v1.23.7 CentOS binary install IPv6 IPv4 Three Masters Two Slaves

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cby-chen edited this page Sep 12, 2022 · 1 revision

二进制安装Kubernetes(k8s) v1.23.7 IPv4/IPv6双栈

Kubernetes 开源不易,帮忙点个star,谢谢了🌹

介绍

kubernetes二进制安装

后续尽可能第一时间更新新版本文档

1.23.3 和 1.23.4 和 1.23.5 和 1.23.6 和 1.23.7 和 1.24.0 和1.24.1 文档以及安装包已生成。

我使用IPV6的目的是在公网进行访问,所以我配置了IPV6静态地址。

若您没有IPV6环境,或者不想使用IPv6,不对主机进行配置IPv6地址即可。

不配置IPV6,不影响后续,不过集群依旧是支持IPv6的。为后期留有扩展可能性。

项目地址:https://github.com/cby-chen/Kubernetes

每个初始版本会打上releases,安装包在releases页面

https://github.com/cby-chen/Kubernetes/releases

(下载更快)我自己的网盘:https://pan.oiox.cn/s/PetV

1.环境

主机名称	IP地址	说明	软件
Master01	10.0.0.81	master节点	kube-apiserver、kube-controller-manager、kube-scheduler、etcd、 kubelet、kube-proxy、nfs-client、haproxy、keepalived
Master02	10.0.0.82	master节点	kube-apiserver、kube-controller-manager、kube-scheduler、etcd、 kubelet、kube-proxy、nfs-client、haproxy、keepalived
Master03	10.0.0.83	master节点	kube-apiserver、kube-controller-manager、kube-scheduler、etcd、 kubelet、kube-proxy、nfs-client、haproxy、keepalived
Node01	10.0.0.84	node节点	kubelet、kube-proxy、nfs-client
Node02	10.0.0.85	node节点	kubelet、kube-proxy、nfs-client
10.0.0.89	VIP

软件	版本
内核	4.18.0-373.el8.x86_64
CentOS 8	v8 或者 v7
kube-apiserver、kube-controller-manager、kube-scheduler、kubelet、kube-proxy	v1.23.7
etcd	v3.5.4
containerd	v1.6.6
cfssl	v1.6.1
cni	v1.1.1
crictl	v1.23.0
haproxy	v1.8.27
keepalived	v2.1.5

网段

物理主机:192.168.1.0/24

service:10.96.0.0/12

pod:172.16.0.0/12

如果有条件建议k8s集群与etcd集群分开安装

1.1.k8s基础系统环境配置

1.2.配置IP

ssh root@10.1.1.112 "nmcli con mod ens160 ipv4.addresses 10.0.0.81/8; nmcli con mod ens160 ipv4.gateway 10.0.0.1; nmcli con mod ens160 ipv4.method manual; nmcli con mod ens160 ipv4.dns "8.8.8.8"; nmcli con up ens160"
ssh root@10.1.1.102 "nmcli con mod ens160 ipv4.addresses 10.0.0.82/8; nmcli con mod ens160 ipv4.gateway 10.0.0.1; nmcli con mod ens160 ipv4.method manual; nmcli con mod ens160 ipv4.dns "8.8.8.8"; nmcli con up ens160"
ssh root@10.1.1.104 "nmcli con mod ens160 ipv4.addresses 10.0.0.83/8; nmcli con mod ens160 ipv4.gateway 10.0.0.1; nmcli con mod ens160 ipv4.method manual; nmcli con mod ens160 ipv4.dns "8.8.8.8"; nmcli con up ens160"
ssh root@10.1.1.105 "nmcli con mod ens160 ipv4.addresses 10.0.0.84/8; nmcli con mod ens160 ipv4.gateway 10.0.0.1; nmcli con mod ens160 ipv4.method manual; nmcli con mod ens160 ipv4.dns "8.8.8.8"; nmcli con up ens160"
ssh root@10.1.1.106 "nmcli con mod ens160 ipv4.addresses 10.0.0.85/8; nmcli con mod ens160 ipv4.gateway 10.0.0.1; nmcli con mod ens160 ipv4.method manual; nmcli con mod ens160 ipv4.dns "8.8.8.8"; nmcli con up ens160"
ssh root@10.0.0.81 "nmcli con mod ens160 ipv6.addresses 2408:8207:78ca:9fa1:181c::10; nmcli con mod ens160 ipv6.gateway fe80::2e2:69ff:fe3f:b198; nmcli con mod ens160 ipv6.method manual; nmcli con mod ens160 ipv6.dns "2001:4860:4860::8888"; nmcli con up ens160"
ssh root@10.0.0.82 "nmcli con mod ens160 ipv6.addresses 2408:8207:78ca:9fa1:181c::20; nmcli con mod ens160 ipv6.gateway fe80::2e2:69ff:fe3f:b198; nmcli con mod ens160 ipv6.method manual; nmcli con mod ens160 ipv6.dns "2001:4860:4860::8888"; nmcli con up ens160"
ssh root@10.0.0.83 "nmcli con mod ens160 ipv6.addresses 2408:8207:78ca:9fa1:181c::30; nmcli con mod ens160 ipv6.gateway fe80::2e2:69ff:fe3f:b198; nmcli con mod ens160 ipv6.method manual; nmcli con mod ens160 ipv6.dns "2001:4860:4860::8888"; nmcli con up ens160"
ssh root@10.0.0.84 "nmcli con mod ens160 ipv6.addresses 2408:8207:78ca:9fa1:181c::40; nmcli con mod ens160 ipv6.gateway fe80::2e2:69ff:fe3f:b198; nmcli con mod ens160 ipv6.method manual; nmcli con mod ens160 ipv6.dns "2001:4860:4860::8888"; nmcli con up ens160"
ssh root@10.0.0.85 "nmcli con mod ens160 ipv6.addresses 2408:8207:78ca:9fa1:181c::50; nmcli con mod ens160 ipv6.gateway fe80::2e2:69ff:fe3f:b198; nmcli con mod ens160 ipv6.method manual; nmcli con mod ens160 ipv6.dns "2001:4860:4860::8888"; nmcli con up ens160"

1.3.设置主机名

hostnamectl set-hostname k8s-master01
hostnamectl set-hostname k8s-master02
hostnamectl set-hostname k8s-master03
hostnamectl set-hostname k8s-node01
hostnamectl set-hostname k8s-node02

1.4.配置yum源

# 对于 CentOS 7
sudo sed -e 's|^mirrorlist=|#mirrorlist=|g' \
 -e 's|^#baseurl=http://mirror.centos.org|baseurl=https://mirrors.tuna.tsinghua.edu.cn|g' \
 -i.bak \
 /etc/yum.repos.d/CentOS-*.repo
# 对于 CentOS 8
sudo sed -e 's|^mirrorlist=|#mirrorlist=|g' \
 -e 's|^#baseurl=http://mirror.centos.org/$contentdir|baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos|g' \
 -i.bak \
 /etc/yum.repos.d/CentOS-*.repo
sed -e 's|^mirrorlist=|#mirrorlist=|g' -e 's|^#baseurl=http://mirror.centos.org/\$contentdir|baseurl=http://10.0.0.123/centos|g' -i.bak /etc/yum.repos.d/CentOS-*.repo

1.5.安装一些必备工具

yum -y install wget jq psmisc vim net-tools nfs-utils telnet yum-utils device-mapper-persistent-data lvm2 git network-scripts tar curl -y

1.6.选择性下载需要工具

1.下载kubernetes1.23.+的二进制包
github二进制包下载地址:https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.23.md
wget https://dl.k8s.io/v1.23.7/kubernetes-server-linux-amd64.tar.gz
2.下载etcdctl二进制包
github二进制包下载地址:https://github.com/etcd-io/etcd/releases
wget https://github.com/etcd-io/etcd/releases/download/v3.5.4/etcd-v3.5.4-linux-amd64.tar.gz
3.containerd二进制包下载
github下载地址:https://github.com/containerd/containerd/releases
containerd下载时下载带cni插件的二进制包。
wget https://github.com/containerd/containerd/releases/download/v1.6.6/cri-containerd-cni-1.6.6-linux-amd64.tar.gz
4.下载cfssl二进制包
github二进制包下载地址:https://github.com/cloudflare/cfssl/releases
wget https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssl_1.6.1_linux_amd64
wget https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssljson_1.6.1_linux_amd64
wget https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssl-certinfo_1.6.1_linux_amd64
5.cni插件下载
github下载地址:https://github.com/containernetworking/plugins/releases
wget https://github.com/containernetworking/plugins/releases/download/v1.1.1/cni-plugins-linux-amd64-v1.1.1.tgz
6.crictl客户端二进制下载
github下载:https://github.com/kubernetes-sigs/cri-tools/releases
wget https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.23.0/crictl-v1.23.0-linux-amd64.tar.gz

1.7.关闭防火墙

systemctl disable --now firewalld

1.8.关闭SELinux

setenforce 0
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config

1.9.关闭交换分区

sed -ri 's/.*swap.*/#&/' /etc/fstab
swapoff -a && sysctl -w vm.swappiness=0
cat /etc/fstab
# /dev/mapper/centos-swap swap swap defaults 0 0

1.10.关闭NetworkManager 并启用 network (lb除外)

systemctl disable --now NetworkManager
systemctl start network && systemctl enable network

1.11.进行时间同步

服务端
yum install chrony -y
cat > /etc/chrony.conf << EOF 
pool ntp.aliyun.com iburst
driftfile /var/lib/chrony/drift
makestep 1.0 3
rtcsync
allow 10.0.0.8/8
local stratum 10
keyfile /etc/chrony.keys
leapsectz right/UTC
logdir /var/log/chrony
EOF
systemctl restart chronyd
systemctl enable chronyd
客户端
yum install chrony -y
cat > /etc/chrony.conf << EOF 
pool 10.0.0.81 iburst
driftfile /var/lib/chrony/drift
makestep 1.0 3
rtcsync
keyfile /etc/chrony.keys
leapsectz right/UTC
logdir /var/log/chrony
EOF
systemctl restart chronyd ; systemctl enable chronyd
使用客户端进行验证
chronyc sources -v

1.12.配置ulimit

ulimit -SHn 65535
cat >> /etc/security/limits.conf <<EOF
* soft nofile 655360
* hard nofile 131072
* soft nproc 655350
* hard nproc 655350
* seft memlock unlimited
* hard memlock unlimitedd
EOF

1.13.配置免密登录

yum install -y sshpass
ssh-keygen -f /root/.ssh/id_rsa -P ''
export IP="10.0.0.81 10.0.0.82 10.0.0.83 10.0.0.84 10.0.0.85"
export SSHPASS=123123
for HOST in $IP;do
 sshpass -e ssh-copy-id -o StrictHostKeyChecking=no $HOST
done

1.14.添加启用源

为 RHEL-8或 CentOS-8配置源
yum install https://www.elrepo.org/elrepo-release-8.el8.elrepo.noarch.rpm
为 RHEL-7 SL-7 或 CentOS-7 安装 ELRepo 
yum install https://www.elrepo.org/elrepo-release-7.el7.elrepo.noarch.rpm
查看可用安装包
yum --disablerepo="*" --enablerepo="elrepo-kernel" list available

1.15.升级内核至4.18版本以上

安装最新的内核
# 我这里选择的是稳定版kernel-ml 如需更新长期维护版本kernel-lt 
yum --enablerepo=elrepo-kernel install kernel-ml
查看已安装那些内核
rpm -qa | grep kernel
kernel-core-4.18.0-358.el8.x86_64
kernel-tools-4.18.0-358.el8.x86_64
kernel-ml-core-5.16.7-1.el8.elrepo.x86_64
kernel-ml-5.16.7-1.el8.elrepo.x86_64
kernel-modules-4.18.0-358.el8.x86_64
kernel-4.18.0-358.el8.x86_64
kernel-tools-libs-4.18.0-358.el8.x86_64
kernel-ml-modules-5.16.7-1.el8.elrepo.x86_64
查看默认内核
grubby --default-kernel
/boot/vmlinuz-5.16.7-1.el8.elrepo.x86_64
若不是最新的使用命令设置
grubby --set-default /boot/vmlinuz-「您的内核版本」.x86_64
重启生效
reboot
v8 整合命令为:
yum install https://www.elrepo.org/elrepo-release-8.el8.elrepo.noarch.rpm -y ; yum --disablerepo="*" --enablerepo="elrepo-kernel" list available -y ; yum --enablerepo=elrepo-kernel install kernel-ml -y ; grubby --default-kernel ; reboot
v7 整合命令为:
yum install https://www.elrepo.org/elrepo-release-7.el7.elrepo.noarch.rpm -y ; yum --disablerepo="*" --enablerepo="elrepo-kernel" list available -y ; yum --enablerepo=elrepo-kernel install kernel-ml -y ; grubby --set-default \$(ls /boot/vmlinuz-* | grep elrepo) ; grubby --default-kernel

1.16.安装ipvsadm

yum install ipvsadm ipset sysstat conntrack libseccomp -y
cat >> /etc/modules-load.d/ipvs.conf <<EOF 
ip_vs
ip_vs_rr
ip_vs_wrr
ip_vs_sh
nf_conntrack
ip_tables
ip_set
xt_set
ipt_set
ipt_rpfilter
ipt_REJECT
ipip
EOF
systemctl restart systemd-modules-load.service
lsmod | grep -e ip_vs -e nf_conntrack
ip_vs_sh 16384 0
ip_vs_wrr 16384 0
ip_vs_rr 16384 0
ip_vs 180224 6 ip_vs_rr,ip_vs_sh,ip_vs_wrr
nf_conntrack 176128 1 ip_vs
nf_defrag_ipv6 24576 2 nf_conntrack,ip_vs
nf_defrag_ipv4 16384 1 nf_conntrack
libcrc32c 16384 3 nf_conntrack,xfs,ip_vs

1.17.修改内核参数

cat <<EOF > /etc/sysctl.d/k8s.conf
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
fs.may_detach_mounts = 1
vm.overcommit_memory=1
vm.panic_on_oom=0
fs.inotify.max_user_watches=89100
fs.file-max=52706963
fs.nr_open=52706963
net.netfilter.nf_conntrack_max=2310720


net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.tcp_keepalive_intvl =15
net.ipv4.tcp_max_tw_buckets = 36000
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_max_orphans = 327680
net.ipv4.tcp_orphan_retries = 3
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.ip_conntrack_max = 65536
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_timestamps = 0
net.core.somaxconn = 16384

net.ipv6.conf.all.disable_ipv6 = 0
net.ipv6.conf.default.disable_ipv6 = 0
net.ipv6.conf.lo.disable_ipv6 = 0
net.ipv6.conf.all.forwarding = 0

EOF
sysctl --system

1.18.所有节点配置hosts本地解析

cat > /etc/hosts <<EOF
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6

2408:8207:78ca:9fa1:181c::10 k8s-master01
2408:8207:78ca:9fa1:181c::20 k8s-master02
2408:8207:78ca:9fa1:181c::30 k8s-master03
2408:8207:78ca:9fa1:181c::40 k8s-node01
2408:8207:78ca:9fa1:181c::50 k8s-node02

10.0.0.81 k8s-master01
10.0.0.82 k8s-master02
10.0.0.83 k8s-master03
10.0.0.84 k8s-node01
10.0.0.85 k8s-node02
10.0.0.89 lb-vip
EOF

2.k8s基本组件安装

2.1.所有k8s节点安装Containerd作为Runtime

wget https://github.com/containernetworking/plugins/releases/download/v1.1.1/cni-plugins-linux-amd64-v1.1.1.tgz
#创建cni插件所需目录
mkdir -p /etc/cni/net.d /opt/cni/bin 
#解压cni二进制包
tar xf cni-plugins-linux-amd64-v1.1.1.tgz -C /opt/cni/bin/
wget https://github.com/containerd/containerd/releases/download/v1.6.6/cri-containerd-cni-1.6.6-linux-amd64.tar.gz
#解压
tar -C / -xzf cri-containerd-cni-1.6.6-linux-amd64.tar.gz
#创建服务启动文件
cat > /etc/systemd/system/containerd.service <<EOF
[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target

[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/local/bin/containerd
Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
LimitNPROC=infinity
LimitCORE=infinity
LimitNOFILE=infinity
TasksMax=infinity
OOMScoreAdjust=-999

[Install]
WantedBy=multi-user.target
EOF

2.1.1配置Containerd所需的模块

cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF

2.1.2加载模块

systemctl restart systemd-modules-load.service

2.1.3配置Containerd所需的内核

cat <<EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF
# 加载内核
sysctl --system

2.1.4创建Containerd的配置文件

mkdir -p /etc/containerd
containerd config default | tee /etc/containerd/config.toml
修改Containerd的配置文件
sed -i "s#SystemdCgroup\ \=\ false#SystemdCgroup\ \=\ true#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep SystemdCgroup
sed -i "s#k8s.gcr.io#registry.cn-hangzhou.aliyuncs.com/chenby#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep sandbox_image
# 找到containerd.runtimes.runc.options,在其下加入SystemdCgroup = true
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc.options]
 SystemdCgroup = true
 [plugins."io.containerd.grpc.v1.cri".cni]
# 将sandbox_image默认地址改为符合版本地址
 sandbox_image = "registry.cn-hangzhou.aliyuncs.com/chenby/pause:3.6"

2.1.5启动并设置为开机启动

systemctl daemon-reload
systemctl enable --now containerd

2.1.6配置crictl客户端连接的运行时位置

wget https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.23.0/crictl-v1.23.0-linux-amd64.tar.gz
#解压
tar xf crictl-v1.23.0-linux-amd64.tar.gz -C /usr/bin/
#生成配置文件
cat > /etc/crictl.yaml <<EOF
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 10
debug: false
EOF
#测试
systemctl restart containerd
crictl info

2.2.k8s与etcd下载及安装(仅在master01操作)

2.2.1解压k8s安装包

解压k8s安装文件
tar -xf kubernetes-server-linux-amd64.tar.gz --strip-components=3 -C /usr/local/bin kubernetes/server/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy}
解压etcd安装文件
tar -xf etcd-v3.5.4-linux-amd64.tar.gz --strip-components=1 -C /usr/local/bin etcd-v3.5.4-linux-amd64/etcd{,ctl}
# 查看/usr/local/bin下内容
ls /usr/local/bin/
etcd etcdctl kube-apiserver kube-controller-manager kubectl kubelet kube-proxy kube-scheduler

2.2.2查看版本

[root@k8s-master01 ~]# kubelet --version
Kubernetes v1.23.7
[root@k8s-master01 ~]# etcdctl version
etcdctl version: 3.5.4
API version: 3.5
[root@k8s-master01 ~]#

2.2.3将组件发送至其他k8s节点

Master='k8s-master02 k8s-master03'
Work='k8s-node01 k8s-node02'
for NODE in $Master; do echo $NODE; scp /usr/local/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy} $NODE:/usr/local/bin/; scp /usr/local/bin/etcd* $NODE:/usr/local/bin/; done
for NODE in $Work; do scp /usr/local/bin/kube{let,-proxy} $NODE:/usr/local/bin/ ; done

2.3创建证书相关文件

mkdir pki
cd pki
cat > admin-csr.json << EOF 
{
 "CN": "admin",
 "key": {
 "algo": "rsa",
 "size": 2048
 },
 "names": [
 {
 "C": "CN",
 "ST": "Beijing",
 "L": "Beijing",
 "O": "system:masters",
 "OU": "Kubernetes-manual"
 }
 ]
}
EOF
cat > ca-config.json << EOF 
{
 "signing": {
 "default": {
 "expiry": "876000h"
 },
 "profiles": {
 "kubernetes": {
 "usages": [
 "signing",
 "key encipherment",
 "server auth",
 "client auth"
 ],
 "expiry": "876000h"
 }
 }
 }
}
EOF
cat > etcd-ca-csr.json << EOF 
{
 "CN": "etcd",
 "key": {
 "algo": "rsa",
 "size": 2048
 },
 "names": [
 {
 "C": "CN",
 "ST": "Beijing",
 "L": "Beijing",
 "O": "etcd",
 "OU": "Etcd Security"
 }
 ],
 "ca": {
 "expiry": "876000h"
 }
}
EOF
cat > front-proxy-ca-csr.json << EOF 
{
 "CN": "kubernetes",
 "key": {
 "algo": "rsa",
 "size": 2048
 },
 "ca": {
 "expiry": "876000h"
 }
}
EOF
cat > kubelet-csr.json << EOF 
{
 "CN": "system:node:\$NODE",
 "key": {
 "algo": "rsa",
 "size": 2048
 },
 "names": [
 {
 "C": "CN",
 "L": "Beijing",
 "ST": "Beijing",
 "O": "system:nodes",
 "OU": "Kubernetes-manual"
 }
 ]
}
EOF
cat > manager-csr.json << EOF 
{
 "CN": "system:kube-controller-manager",
 "key": {
 "algo": "rsa",
 "size": 2048
 },
 "names": [
 {
 "C": "CN",
 "ST": "Beijing",
 "L": "Beijing",
 "O": "system:kube-controller-manager",
 "OU": "Kubernetes-manual"
 }
 ]
}
EOF
cat > apiserver-csr.json << EOF 
{
 "CN": "kube-apiserver",
 "key": {
 "algo": "rsa",
 "size": 2048
 },
 "names": [
 {
 "C": "CN",
 "ST": "Beijing",
 "L": "Beijing",
 "O": "Kubernetes",
 "OU": "Kubernetes-manual"
 }
 ]
}
EOF
cat > ca-csr.json << EOF 
{
 "CN": "kubernetes",
 "key": {
 "algo": "rsa",
 "size": 2048
 },
 "names": [
 {
 "C": "CN",
 "ST": "Beijing",
 "L": "Beijing",
 "O": "Kubernetes",
 "OU": "Kubernetes-manual"
 }
 ],
 "ca": {
 "expiry": "876000h"
 }
}
EOF
cat > etcd-csr.json << EOF 
{
 "CN": "etcd",
 "key": {
 "algo": "rsa",
 "size": 2048
 },
 "names": [
 {
 "C": "CN",
 "ST": "Beijing",
 "L": "Beijing",
 "O": "etcd",
 "OU": "Etcd Security"
 }
 ]
}
EOF
cat > front-proxy-client-csr.json << EOF 
{
 "CN": "front-proxy-client",
 "key": {
 "algo": "rsa",
 "size": 2048
 }
}
EOF
cat > kube-proxy-csr.json << EOF 
{
 "CN": "system:kube-proxy",
 "key": {
 "algo": "rsa",
 "size": 2048
 },
 "names": [
 {
 "C": "CN",
 "ST": "Beijing",
 "L": "Beijing",
 "O": "system:kube-proxy",
 "OU": "Kubernetes-manual"
 }
 ]
}
EOF
cat > scheduler-csr.json << EOF 
{
 "CN": "system:kube-scheduler",
 "key": {
 "algo": "rsa",
 "size": 2048
 },
 "names": [
 {
 "C": "CN",
 "ST": "Beijing",
 "L": "Beijing",
 "O": "system:kube-scheduler",
 "OU": "Kubernetes-manual"
 }
 ]
}
EOF
cd ..
mkdir bootstrap
cd bootstrap
cat > bootstrap.secret.yaml << EOF 
apiVersion: v1
kind: Secret
metadata:
 name: bootstrap-token-c8ad9c
 namespace: kube-system
type: bootstrap.kubernetes.io/token
stringData:
 description: "The default bootstrap token generated by 'kubelet '."
 token-id: c8ad9c
 token-secret: 2e4d610cf3e7426e
 usage-bootstrap-authentication: "true"
 usage-bootstrap-signing: "true"
 auth-extra-groups: system:bootstrappers:default-node-token,system:bootstrappers:worker,system:bootstrappers:ingress

---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
 name: kubelet-bootstrap
roleRef:
 apiGroup: rbac.authorization.k8s.io
 kind: ClusterRole
 name: system:node-bootstrapper
subjects:
- apiGroup: rbac.authorization.k8s.io
 kind: Group
 name: system:bootstrappers:default-node-token
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
 name: node-autoapprove-bootstrap
roleRef:
 apiGroup: rbac.authorization.k8s.io
 kind: ClusterRole
 name: system:certificates.k8s.io:certificatesigningrequests:nodeclient
subjects:
- apiGroup: rbac.authorization.k8s.io
 kind: Group
 name: system:bootstrappers:default-node-token
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
 name: node-autoapprove-certificate-rotation
roleRef:
 apiGroup: rbac.authorization.k8s.io
 kind: ClusterRole
 name: system:certificates.k8s.io:certificatesigningrequests:selfnodeclient
subjects:
- apiGroup: rbac.authorization.k8s.io
 kind: Group
 name: system:nodes
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
 annotations:
 rbac.authorization.kubernetes.io/autoupdate: "true"
 labels:
 kubernetes.io/bootstrapping: rbac-defaults
 name: system:kube-apiserver-to-kubelet
rules:
 - apiGroups:
 - ""
 resources:
 - nodes/proxy
 - nodes/stats
 - nodes/log
 - nodes/spec
 - nodes/metrics
 verbs:
 - "*"
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
 name: system:kube-apiserver
 namespace: ""
roleRef:
 apiGroup: rbac.authorization.k8s.io
 kind: ClusterRole
 name: system:kube-apiserver-to-kubelet
subjects:
 - apiGroup: rbac.authorization.k8s.io
 kind: User
 name: kube-apiserver
EOF
cd ..
mkdir coredns
cd coredns
cat > coredns.yaml << EOF 
apiVersion: v1
kind: ServiceAccount
metadata:
 name: coredns
 namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
 labels:
 kubernetes.io/bootstrapping: rbac-defaults
 name: system:coredns
rules:
 - apiGroups:
 - ""
 resources:
 - endpoints
 - services
 - pods
 - namespaces
 verbs:
 - list
 - watch
 - apiGroups:
 - discovery.k8s.io
 resources:
 - endpointslices
 verbs:
 - list
 - watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
 annotations:
 rbac.authorization.kubernetes.io/autoupdate: "true"
 labels:
 kubernetes.io/bootstrapping: rbac-defaults
 name: system:coredns
roleRef:
 apiGroup: rbac.authorization.k8s.io
 kind: ClusterRole
 name: system:coredns
subjects:
- kind: ServiceAccount
 name: coredns
 namespace: kube-system
---
apiVersion: v1
kind: ConfigMap
metadata:
 name: coredns
 namespace: kube-system
data:
 Corefile: |
 .:53 {
 errors
 health {
 lameduck 5s
 }
 ready
 kubernetes cluster.local in-addr.arpa ip6.arpa {
 fallthrough in-addr.arpa ip6.arpa
 }
 prometheus :9153
 forward . /etc/resolv.conf {
 max_concurrent 1000
 }
 cache 30
 loop
 reload
 loadbalance
 }
---
apiVersion: apps/v1
kind: Deployment
metadata:
 name: coredns
 namespace: kube-system
 labels:
 k8s-app: kube-dns
 kubernetes.io/name: "CoreDNS"
spec:
 # replicas: not specified here:
 # 1. Default is 1.
 # 2. Will be tuned in real time if DNS horizontal auto-scaling is turned on.
 strategy:
 type: RollingUpdate
 rollingUpdate:
 maxUnavailable: 1
 selector:
 matchLabels:
 k8s-app: kube-dns
 template:
 metadata:
 labels:
 k8s-app: kube-dns
 spec:
 priorityClassName: system-cluster-critical
 serviceAccountName: coredns
 tolerations:
 - key: "CriticalAddonsOnly"
 operator: "Exists"
 nodeSelector:
 kubernetes.io/os: linux
 affinity:
 podAntiAffinity:
 preferredDuringSchedulingIgnoredDuringExecution:
 - weight: 100
 podAffinityTerm:
 labelSelector:
 matchExpressions:
 - key: k8s-app
 operator: In
 values: ["kube-dns"]
 topologyKey: kubernetes.io/hostname
 containers:
 - name: coredns
 image: registry.cn-beijing.aliyuncs.com/dotbalo/coredns:1.8.6 
 imagePullPolicy: IfNotPresent
 resources:
 limits:
 memory: 170Mi
 requests:
 cpu: 100m
 memory: 70Mi
 args: [ "-conf", "/etc/coredns/Corefile" ]
 volumeMounts:
 - name: config-volume
 mountPath: /etc/coredns
 readOnly: true
 ports:
 - containerPort: 53
 name: dns
 protocol: UDP
 - containerPort: 53
 name: dns-tcp
 protocol: TCP
 - containerPort: 9153
 name: metrics
 protocol: TCP
 securityContext:
 allowPrivilegeEscalation: false
 capabilities:
 add:
 - NET_BIND_SERVICE
 drop:
 - all
 readOnlyRootFilesystem: true
 livenessProbe:
 httpGet:
 path: /health
 port: 8080
 scheme: HTTP
 initialDelaySeconds: 60
 timeoutSeconds: 5
 successThreshold: 1
 failureThreshold: 5
 readinessProbe:
 httpGet:
 path: /ready
 port: 8181
 scheme: HTTP
 dnsPolicy: Default
 volumes:
 - name: config-volume
 configMap:
 name: coredns
 items:
 - key: Corefile
 path: Corefile
---
apiVersion: v1
kind: Service
metadata:
 name: kube-dns
 namespace: kube-system
 annotations:
 prometheus.io/port: "9153"
 prometheus.io/scrape: "true"
 labels:
 k8s-app: kube-dns
 kubernetes.io/cluster-service: "true"
 kubernetes.io/name: "CoreDNS"
spec:
 selector:
 k8s-app: kube-dns
 clusterIP: 10.96.0.10 
 ports:
 - name: dns
 port: 53
 protocol: UDP
 - name: dns-tcp
 port: 53
 protocol: TCP
 - name: metrics
 port: 9153
 protocol: TCP
EOF
cd ..
mkdir metrics-server
cd metrics-server
cat > metrics-server.yaml << EOF 
apiVersion: v1
kind: ServiceAccount
metadata:
 labels:
 k8s-app: metrics-server
 name: metrics-server
 namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
 labels:
 k8s-app: metrics-server
 rbac.authorization.k8s.io/aggregate-to-admin: "true"
 rbac.authorization.k8s.io/aggregate-to-edit: "true"
 rbac.authorization.k8s.io/aggregate-to-view: "true"
 name: system:aggregated-metrics-reader
rules:
- apiGroups:
 - metrics.k8s.io
 resources:
 - pods
 - nodes
 verbs:
 - get
 - list
 - watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
 labels:
 k8s-app: metrics-server
 name: system:metrics-server
rules:
- apiGroups:
 - ""
 resources:
 - pods
 - nodes
 - nodes/stats
 - namespaces
 - configmaps
 verbs:
 - get
 - list
 - watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
 labels:
 k8s-app: metrics-server
 name: metrics-server-auth-reader
 namespace: kube-system
roleRef:
 apiGroup: rbac.authorization.k8s.io
 kind: Role
 name: extension-apiserver-authentication-reader
subjects:
- kind: ServiceAccount
 name: metrics-server
 namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
 labels:
 k8s-app: metrics-server
 name: metrics-server:system:auth-delegator
roleRef:
 apiGroup: rbac.authorization.k8s.io
 kind: ClusterRole
 name: system:auth-delegator
subjects:
- kind: ServiceAccount
 name: metrics-server
 namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
 labels:
 k8s-app: metrics-server
 name: system:metrics-server
roleRef:
 apiGroup: rbac.authorization.k8s.io
 kind: ClusterRole
 name: system:metrics-server
subjects:
- kind: ServiceAccount
 name: metrics-server
 namespace: kube-system
---
apiVersion: v1
kind: Service
metadata:
 labels:
 k8s-app: metrics-server
 name: metrics-server
 namespace: kube-system
spec:
 ports:
 - name: https
 port: 443
 protocol: TCP
 targetPort: https
 selector:
 k8s-app: metrics-server
---
apiVersion: apps/v1
kind: Deployment
metadata:
 labels:
 k8s-app: metrics-server
 name: metrics-server
 namespace: kube-system
spec:
 selector:
 matchLabels:
 k8s-app: metrics-server
 strategy:
 rollingUpdate:
 maxUnavailable: 0
 template:
 metadata:
 labels:
 k8s-app: metrics-server
 spec:
 containers:
 - args:
 - --cert-dir=/tmp
 - --secure-port=4443
 - --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
 - --kubelet-use-node-status-port
 - --metric-resolution=15s
 - --kubelet-insecure-tls
 - --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem # change to front-proxy-ca.crt for kubeadm
 - --requestheader-username-headers=X-Remote-User
 - --requestheader-group-headers=X-Remote-Group
 - --requestheader-extra-headers-prefix=X-Remote-Extra-
 image: registry.cn-beijing.aliyuncs.com/dotbalo/metrics-server:0.5.0
 imagePullPolicy: IfNotPresent
 livenessProbe:
 failureThreshold: 3
 httpGet:
 path: /livez
 port: https
 scheme: HTTPS
 periodSeconds: 10
 name: metrics-server
 ports:
 - containerPort: 4443
 name: https
 protocol: TCP
 readinessProbe:
 failureThreshold: 3
 httpGet:
 path: /readyz
 port: https
 scheme: HTTPS
 initialDelaySeconds: 20
 periodSeconds: 10
 resources:
 requests:
 cpu: 100m
 memory: 200Mi
 securityContext:
 readOnlyRootFilesystem: true
 runAsNonRoot: true
 runAsUser: 1000
 volumeMounts:
 - mountPath: /tmp
 name: tmp-dir
 - name: ca-ssl
 mountPath: /etc/kubernetes/pki
 nodeSelector:
 kubernetes.io/os: linux
 priorityClassName: system-cluster-critical
 serviceAccountName: metrics-server
 volumes:
 - emptyDir: {}
 name: tmp-dir
 - name: ca-ssl
 hostPath:
 path: /etc/kubernetes/pki

---
apiVersion: apiregistration.k8s.io/v1
kind: APIService
metadata:
 labels:
 k8s-app: metrics-server
 name: v1beta1.metrics.k8s.io
spec:
 group: metrics.k8s.io
 groupPriorityMinimum: 100
 insecureSkipTLSVerify: true
 service:
 name: metrics-server
 namespace: kube-system
 version: v1beta1
 versionPriority: 100
EOF

3.相关证书生成

master01节点下载证书生成工具
wget "https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssl_1.6.1_linux_amd64" -O /usr/local/bin/cfssl
wget "https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssljson_1.6.1_linux_amd64" -O /usr/local/bin/cfssljson
chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson

3.1.生成etcd证书

特别说明除外,以下操作在所有master节点操作

3.1.1所有master节点创建证书存放目录

mkdir /etc/etcd/ssl -p

3.1.2master01节点生成etcd证书

cd Kubernetes/pki/
# 生成etcd证书和etcd证书的key(如果你觉得以后可能会扩容,可以在ip那多写几个预留出来)
cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare /etc/etcd/ssl/etcd-ca
cfssl gencert \
 -ca=/etc/etcd/ssl/etcd-ca.pem \
 -ca-key=/etc/etcd/ssl/etcd-ca-key.pem \
 -config=ca-config.json \
 -hostname=127.0.0.1,k8s-master01,k8s-master02,k8s-master03,10.0.0.81,10.0.0.82,10.0.0.83 \
 -profile=kubernetes \
 etcd-csr.json | cfssljson -bare /etc/etcd/ssl/etcd

3.1.3将证书复制到其他节点

Master='k8s-master02 k8s-master03'
for NODE in $Master; do ssh $NODE "mkdir -p /etc/etcd/ssl"; for FILE in etcd-ca-key.pem etcd-ca.pem etcd-key.pem etcd.pem; do scp /etc/etcd/ssl/${FILE} $NODE:/etc/etcd/ssl/${FILE}; done; done

3.2.生成k8s相关证书

特别说明除外,以下操作在所有master节点操作

3.2.1所有k8s节点创建证书存放目录

mkdir -p /etc/kubernetes/pki

3.2.2master01节点生成k8s证书

# 生成一个根证书
cfssl gencert -initca ca-csr.json | cfssljson -bare /etc/kubernetes/pki/ca
# 10.96.0.1是service网段的第一个地址,需要计算,10.0.0.89为高可用vip地址
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-hostname=10.96.0.1,10.0.0.89,127.0.0.1,kubernetes,kubernetes.default,kubernetes.default.svc,kubernetes.default.svc.cluster,kubernetes.default.svc.cluster.local,x.oiox.cn,k.oiox.cn,l.oiox.cn,o.oiox.cn,10.0.0.81,10.0.0.82,10.0.0.83,10.0.0.84,10.0.0.85,10.0.0.86,10.0.0.87,10.0.0.88,10.0.0.89,192.168.1.90,192.168.1.40,192.168.1.41 \
-profile=kubernetes apiserver-csr.json | cfssljson -bare /etc/kubernetes/pki/apiserver

3.2.3生成apiserver聚合证书

cfssl gencert -initca front-proxy-ca-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-ca 
# 有一个警告,可以忽略
cfssl gencert \
-ca=/etc/kubernetes/pki/front-proxy-ca.pem \
-ca-key=/etc/kubernetes/pki/front-proxy-ca-key.pem \
-config=ca-config.json \
-profile=kubernetes front-proxy-client-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-client

3.2.4生成controller-manage的证书

cfssl gencert \
 -ca=/etc/kubernetes/pki/ca.pem \
 -ca-key=/etc/kubernetes/pki/ca-key.pem \
 -config=ca-config.json \
 -profile=kubernetes \
 manager-csr.json | cfssljson -bare /etc/kubernetes/pki/controller-manager
# 设置一个集群项
kubectl config set-cluster kubernetes \
 --certificate-authority=/etc/kubernetes/pki/ca.pem \
 --embed-certs=true \
 --server=https://10.0.0.89:8443 \
 --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
# 设置一个环境项,一个上下文
kubectl config set-context system:kube-controller-manager@kubernetes \
 --cluster=kubernetes \
 --user=system:kube-controller-manager \
 --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
# 设置一个用户项
kubectl config set-credentials system:kube-controller-manager \
 --client-certificate=/etc/kubernetes/pki/controller-manager.pem \
 --client-key=/etc/kubernetes/pki/controller-manager-key.pem \
 --embed-certs=true \
 --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
# 设置默认环境
kubectl config use-context system:kube-controller-manager@kubernetes \
 --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
cfssl gencert \
 -ca=/etc/kubernetes/pki/ca.pem \
 -ca-key=/etc/kubernetes/pki/ca-key.pem \
 -config=ca-config.json \
 -profile=kubernetes \
 scheduler-csr.json | cfssljson -bare /etc/kubernetes/pki/scheduler
kubectl config set-cluster kubernetes \
 --certificate-authority=/etc/kubernetes/pki/ca.pem \
 --embed-certs=true \
 --server=https://10.0.0.89:8443 \
 --kubeconfig=/etc/kubernetes/scheduler.kubeconfig
kubectl config set-credentials system:kube-scheduler \
 --client-certificate=/etc/kubernetes/pki/scheduler.pem \
 --client-key=/etc/kubernetes/pki/scheduler-key.pem \
 --embed-certs=true \
 --kubeconfig=/etc/kubernetes/scheduler.kubeconfig
kubectl config set-context system:kube-scheduler@kubernetes \
 --cluster=kubernetes \
 --user=system:kube-scheduler \
 --kubeconfig=/etc/kubernetes/scheduler.kubeconfig
kubectl config use-context system:kube-scheduler@kubernetes \
 --kubeconfig=/etc/kubernetes/scheduler.kubeconfig
cfssl gencert \
 -ca=/etc/kubernetes/pki/ca.pem \
 -ca-key=/etc/kubernetes/pki/ca-key.pem \
 -config=ca-config.json \
 -profile=kubernetes \
 admin-csr.json | cfssljson -bare /etc/kubernetes/pki/admin
kubectl config set-cluster kubernetes \
 --certificate-authority=/etc/kubernetes/pki/ca.pem \
 --embed-certs=true \
 --server=https://10.0.0.89:8443 \
 --kubeconfig=/etc/kubernetes/admin.kubeconfig
kubectl config set-credentials kubernetes-admin \
 --client-certificate=/etc/kubernetes/pki/admin.pem \
 --client-key=/etc/kubernetes/pki/admin-key.pem \
 --embed-certs=true \
 --kubeconfig=/etc/kubernetes/admin.kubeconfig
kubectl config set-context kubernetes-admin@kubernetes \
 --cluster=kubernetes \
 --user=kubernetes-admin \
 --kubeconfig=/etc/kubernetes/admin.kubeconfig
kubectl config use-context kubernetes-admin@kubernetes --kubeconfig=/etc/kubernetes/admin.kubeconfig

3.2.5创建ServiceAccount Key ——secret

openssl genrsa -out /etc/kubernetes/pki/sa.key 2048
openssl rsa -in /etc/kubernetes/pki/sa.key -pubout -out /etc/kubernetes/pki/sa.pub

3.2.6将证书发送到其他master节点

for NODE in k8s-master02 k8s-master03; do for FILE in $(ls /etc/kubernetes/pki | grep -v etcd); do scp /etc/kubernetes/pki/${FILE} $NODE:/etc/kubernetes/pki/${FILE}; done; for FILE in admin.kubeconfig controller-manager.kubeconfig scheduler.kubeconfig; do scp /etc/kubernetes/${FILE} $NODE:/etc/kubernetes/${FILE}; done; done

3.2.7查看证书

ls /etc/kubernetes/pki/
admin.csr apiserver-key.pem ca.pem front-proxy-ca.csr front-proxy-client-key.pem scheduler.csr
admin-key.pem apiserver.pem controller-manager.csr front-proxy-ca-key.pem front-proxy-client.pem scheduler-key.pem
admin.pem ca.csr controller-manager-key.pem front-proxy-ca.pem sa.key scheduler.pem
apiserver.csr ca-key.pem controller-manager.pem front-proxy-client.csr sa.pub
# 一共23个就对了
ls /etc/kubernetes/pki/ |wc -l
23

4.k8s系统组件配置

4.1.etcd配置

4.1.1master01配置

cat > /etc/etcd/etcd.config.yml << EOF 
name: 'k8s-master01'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://10.0.0.81:2380'
listen-client-urls: 'https://10.0.0.81:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://10.0.0.81:2380'
advertise-client-urls: 'https://10.0.0.81:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://10.0.0.81:2380,k8s-master02=https://10.0.0.82:2380,k8s-master03=https://10.0.0.83:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
 cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
 key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
 client-cert-auth: true
 trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
 auto-tls: true
peer-transport-security:
 cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
 key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
 peer-client-cert-auth: true
 trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
 auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF

4.1.2master02配置

cat > /etc/etcd/etcd.config.yml << EOF 
name: 'k8s-master02'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://10.0.0.82:2380'
listen-client-urls: 'https://10.0.0.82:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://10.0.0.82:2380'
advertise-client-urls: 'https://10.0.0.82:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://10.0.0.81:2380,k8s-master02=https://10.0.0.82:2380,k8s-master03=https://10.0.0.83:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
 cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
 key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
 client-cert-auth: true
 trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
 auto-tls: true
peer-transport-security:
 cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
 key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
 peer-client-cert-auth: true
 trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
 auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF

4.1.3master03配置

cat > /etc/etcd/etcd.config.yml << EOF 
name: 'k8s-master03'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://10.0.0.83:2380'
listen-client-urls: 'https://10.0.0.83:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://10.0.0.83:2380'
advertise-client-urls: 'https://10.0.0.83:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://10.0.0.81:2380,k8s-master02=https://10.0.0.82:2380,k8s-master03=https://10.0.0.83:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
 cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
 key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
 client-cert-auth: true
 trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
 auto-tls: true
peer-transport-security:
 cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
 key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
 peer-client-cert-auth: true
 trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
 auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF

4.2.创建service(所有master节点操作)

4.2.1创建etcd.service并启动

cat > /usr/lib/systemd/system/etcd.service << EOF

[Unit]
Description=Etcd Service
Documentation=https://coreos.com/etcd/docs/latest/
After=network.target

[Service]
Type=notify
ExecStart=/usr/local/bin/etcd --config-file=/etc/etcd/etcd.config.yml
Restart=on-failure
RestartSec=10
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
Alias=etcd3.service

EOF

4.2.2创建etcd证书目录

mkdir /etc/kubernetes/pki/etcd
ln -s /etc/etcd/ssl/* /etc/kubernetes/pki/etcd/
systemctl daemon-reload
systemctl enable --now etcd

4.2.3查看etcd状态

export ETCDCTL_API=3
etcdctl --endpoints="10.0.0.83:2379,10.0.0.82:2379,10.0.0.81:2379" --cacert=/etc/kubernetes/pki/etcd/etcd-ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem endpoint status --write-out=table
+-------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+-------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| 10.0.0.83:2379 | 7cb7be3df5c81965 | 3.5.2 | 20 kB | false | false | 2 | 9 | 9 | |
| 10.0.0.82:2379 | c077939949ab3f8b | 3.5.2 | 20 kB | false | false | 2 | 9 | 9 | |
| 10.0.0.81:2379 | 2ee388f67565dac9 | 3.5.2 | 20 kB | true | false | 2 | 9 | 9 | |
+-------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
[root@k8s-master01 pki]#

5.高可用配置

5.1在master01和master02和master03服务器上操作

5.1.1安装keepalived和haproxy服务

yum -y install keepalived haproxy

5.1.2修改haproxy配置文件(配置文件一样)

# cp /etc/haproxy/haproxy.cfg /etc/haproxy/haproxy.cfg.bak
cat >/etc/haproxy/haproxy.cfg<<"EOF"
global
 maxconn 2000
 ulimit-n 16384
 log 127.0.0.1 local0 err
 stats timeout 30s

defaults
 log global
 mode http
 option httplog
 timeout connect 5000
 timeout client 50000
 timeout server 50000
 timeout http-request 15s
 timeout http-keep-alive 15s


frontend monitor-in
 bind *:33305
 mode http
 option httplog
 monitor-uri /monitor

frontend k8s-master
 bind 0.0.0.0:8443
 bind 127.0.0.1:8443
 mode tcp
 option tcplog
 tcp-request inspect-delay 5s
 default_backend k8s-master


backend k8s-master
 mode tcp
 option tcplog
 option tcp-check
 balance roundrobin
 default-server inter 10s downinter 5s rise 2 fall 2 slowstart 60s maxconn 250 maxqueue 256 weight 100
 server k8s-master01 10.0.0.81:6443 check
 server k8s-master02 10.0.0.82:6443 check
 server k8s-master03 10.0.0.83:6443 check
EOF

5.1.3配置keepalived master节点

#cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
cat > /etc/keepalived/keepalived.conf << EOF
! Configuration File for keepalived

global_defs {
 router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
 script "/etc/keepalived/check_apiserver.sh"
 interval 5 
 weight -5
 fall 2
 rise 1
}
vrrp_instance VI_1 {
 state MASTER
 interface ens160
 mcast_src_ip 10.0.0.81
 virtual_router_id 51
 priority 100
 nopreempt
 advert_int 2
 authentication {
 auth_type PASS
 auth_pass K8SHA_KA_AUTH
 }
 virtual_ipaddress {
 10.0.0.89
 }
 track_script {
 chk_apiserver 
} }

EOF

5.1.4lb02配置keepalived backup节点

# cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
cat > /etc/keepalived/keepalived.conf << EOF
! Configuration File for keepalived

global_defs {
 router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
 script "/etc/keepalived/check_apiserver.sh"
 interval 5 
 weight -5
 fall 2
 rise 1

}
vrrp_instance VI_1 {
 state BACKUP
 interface ens160
 mcast_src_ip 192.168.1.82
 virtual_router_id 51
 priority 50
 nopreempt
 advert_int 2
 authentication {
 auth_type PASS
 auth_pass K8SHA_KA_AUTH
 }
 virtual_ipaddress {
 10.0.0.89
 }
 track_script {
 chk_apiserver 
} }

EOF

5.1.5配置keepalived backup节点

# cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
cat > /etc/keepalived/keepalived.conf << EOF
! Configuration File for keepalived

global_defs {
 router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
 script "/etc/keepalived/check_apiserver.sh"
 interval 5 
 weight -5
 fall 2
 rise 1

}
vrrp_instance VI_1 {
 state BACKUP
 interface ens160
 mcast_src_ip 192.168.1.83
 virtual_router_id 51
 priority 30
 nopreempt
 advert_int 2
 authentication {
 auth_type PASS
 auth_pass K8SHA_KA_AUTH
 }
 virtual_ipaddress {
 10.0.0.89
 }
 track_script {
 chk_apiserver 
} }

EOF

5.1.5健康检查脚本配置

cat > /etc/keepalived/check_apiserver.sh << EOF
#!/bin/bash

err=0
for k in \$(seq 1 3)
do
 check_code=\$(pgrep haproxy)
 if [[ \$check_code == "" ]]; then
 err=\$(expr \$err + 1)
 sleep 1
 continue
 else
 err=0
 break
 fi
done

if [[ \$err != "0" ]]; then
 echo "systemctl stop keepalived"
 /usr/bin/systemctl stop keepalived
 exit 1
else
 exit 0
fi
EOF
# 给脚本授权
chmod +x /etc/keepalived/check_apiserver.sh

5.1.6启动服务

systemctl daemon-reload
systemctl enable --now haproxy
systemctl enable --now keepalived

5.1.7测试高可用

# 能ping同
[root@k8s-node02 ~]# ping 10.0.0.89
# 能telnet访问
[root@k8s-node02 ~]# telnet 10.0.0.89 8443
# 关闭主节点,看vip是否漂移到备节点

6.k8s组件配置(区别于第4点)

所有k8s节点创建以下目录

mkdir -p /etc/kubernetes/manifests/ /etc/systemd/system/kubelet.service.d /var/lib/kubelet /var/log/kubernetes

6.1.创建apiserver(所有master节点)

6.1.1master01节点配置

cat > /usr/lib/systemd/system/kube-apiserver.service << EOF

[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/local/bin/kube-apiserver \
 --v=2 \
 --logtostderr=true \
 --allow-privileged=true \
 --bind-address=0.0.0.0 \
 --secure-port=6443 \
 --insecure-port=0 \
 --advertise-address=10.0.0.81 \
 --service-cluster-ip-range=10.96.0.0/12,fd00::/108 \
 --feature-gates=IPv6DualStack=true \
 --service-node-port-range=30000-32767 \
 --etcd-servers=https://10.0.0.81:2379,https://10.0.0.82:2379,https://10.0.0.83:2379 \
 --etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \
 --etcd-certfile=/etc/etcd/ssl/etcd.pem \
 --etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \
 --client-ca-file=/etc/kubernetes/pki/ca.pem \
 --tls-cert-file=/etc/kubernetes/pki/apiserver.pem \
 --tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \
 --kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \
 --kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \
 --service-account-key-file=/etc/kubernetes/pki/sa.pub \
 --service-account-signing-key-file=/etc/kubernetes/pki/sa.key \
 --service-account-issuer=https://kubernetes.default.svc.cluster.local \
 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \
 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \
 --authorization-mode=Node,RBAC \
 --enable-bootstrap-token-auth=true \
 --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \
 --proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \
 --proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \
 --requestheader-allowed-names=aggregator \
 --requestheader-group-headers=X-Remote-Group \
 --requestheader-extra-headers-prefix=X-Remote-Extra- \
 --requestheader-username-headers=X-Remote-User \
 --enable-aggregator-routing=true
 # --token-auth-file=/etc/kubernetes/token.csv

Restart=on-failure
RestartSec=10s
LimitNOFILE=65535

[Install]
WantedBy=multi-user.target

EOF

6.1.2master02节点配置

cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/local/bin/kube-apiserver \
 --v=2 \
 --logtostderr=true \
 --allow-privileged=true \
 --bind-address=0.0.0.0 \
 --secure-port=6443 \
 --insecure-port=0 \
 --advertise-address=10.0.0.82 \
 --service-cluster-ip-range=10.96.0.0/12,fd00::/108 \
 --feature-gates=IPv6DualStack=true \
 --service-node-port-range=30000-32767 \
 --etcd-servers=https://10.0.0.81:2379,https://10.0.0.82:2379,https://10.0.0.83:2379 \
 --etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \
 --etcd-certfile=/etc/etcd/ssl/etcd.pem \
 --etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \
 --client-ca-file=/etc/kubernetes/pki/ca.pem \
 --tls-cert-file=/etc/kubernetes/pki/apiserver.pem \
 --tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \
 --kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \
 --kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \
 --service-account-key-file=/etc/kubernetes/pki/sa.pub \
 --service-account-signing-key-file=/etc/kubernetes/pki/sa.key \
 --service-account-issuer=https://kubernetes.default.svc.cluster.local \
 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \
 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \
 --authorization-mode=Node,RBAC \
 --enable-bootstrap-token-auth=true \
 --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \
 --proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \
 --proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \
 --requestheader-allowed-names=aggregator \
 --requestheader-group-headers=X-Remote-Group \
 --requestheader-extra-headers-prefix=X-Remote-Extra- \
 --requestheader-username-headers=X-Remote-User \
 --enable-aggregator-routing=true
 # --token-auth-file=/etc/kubernetes/token.csv

Restart=on-failure
RestartSec=10s
LimitNOFILE=65535

[Install]
WantedBy=multi-user.target

EOF

6.1.3master03节点配置

cat > /usr/lib/systemd/system/kube-apiserver.service << EOF

[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/local/bin/kube-apiserver \
 --v=2 \
 --logtostderr=true \
 --allow-privileged=true \
 --bind-address=0.0.0.0 \
 --secure-port=6443 \
 --insecure-port=0 \
 --advertise-address=10.0.0.83 \
 --service-cluster-ip-range=10.96.0.0/12,fd00::/108 \
 --feature-gates=IPv6DualStack=true \
 --service-node-port-range=30000-32767 \
 --etcd-servers=https://10.0.0.81:2379,https://10.0.0.82:2379,https://10.0.0.83:2379 \
 --etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \
 --etcd-certfile=/etc/etcd/ssl/etcd.pem \
 --etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \
 --client-ca-file=/etc/kubernetes/pki/ca.pem \
 --tls-cert-file=/etc/kubernetes/pki/apiserver.pem \
 --tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \
 --kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \
 --kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \
 --service-account-key-file=/etc/kubernetes/pki/sa.pub \
 --service-account-signing-key-file=/etc/kubernetes/pki/sa.key \
 --service-account-issuer=https://kubernetes.default.svc.cluster.local \
 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \
 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \
 --authorization-mode=Node,RBAC \
 --enable-bootstrap-token-auth=true \
 --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \
 --proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \
 --proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \
 --requestheader-allowed-names=aggregator \
 --requestheader-group-headers=X-Remote-Group \
 --requestheader-extra-headers-prefix=X-Remote-Extra- \
 --requestheader-username-headers=X-Remote-User \
 --enable-aggregator-routing=true
 # --token-auth-file=/etc/kubernetes/token.csv

Restart=on-failure
RestartSec=10s
LimitNOFILE=65535

[Install]
WantedBy=multi-user.target

EOF

6.1.4启动apiserver(所有master节点)

systemctl daemon-reload && systemctl enable --now kube-apiserver
# 注意查看状态是否启动正常
systemctl status kube-apiserver

6.2.配置kube-controller-manager service

所有master节点配置,且配置相同
172.16.0.0/12为pod网段,按需求设置你自己的网段
cat > /usr/lib/systemd/system/kube-controller-manager.service << EOF

[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/local/bin/kube-controller-manager \
 --v=2 \
 --logtostderr=true \
 --address=127.0.0.1 \
 --root-ca-file=/etc/kubernetes/pki/ca.pem \
 --cluster-signing-cert-file=/etc/kubernetes/pki/ca.pem \
 --cluster-signing-key-file=/etc/kubernetes/pki/ca-key.pem \
 --service-account-private-key-file=/etc/kubernetes/pki/sa.key \
 --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig \
 --leader-elect=true \
 --use-service-account-credentials=true \
 --node-monitor-grace-period=40s \
 --node-monitor-period=5s \
 --pod-eviction-timeout=2m0s \
 --controllers=*,bootstrapsigner,tokencleaner \
 --allocate-node-cidrs=true \
 --service-cluster-ip-range=10.96.0.0/12,fd00::/108 \
 --cluster-cidr=172.16.0.0/12,fc00::/48 \
 --node-cidr-mask-size-ipv4=24 \
 --node-cidr-mask-size-ipv6=64 \
 --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \
 --feature-gates=IPv6DualStack=true

Restart=always
RestartSec=10s

[Install]
WantedBy=multi-user.target

EOF

6.2.1启动kube-controller-manager,并查看状态

systemctl daemon-reload
systemctl enable --now kube-controller-manager
systemctl status kube-controller-manager

6.3.配置kube-scheduler service

6.3.1所有master节点配置,且配置相同

cat > /usr/lib/systemd/system/kube-scheduler.service << EOF

[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/local/bin/kube-scheduler \
 --v=2 \
 --logtostderr=true \
 --address=127.0.0.1 \
 --leader-elect=true \
 --kubeconfig=/etc/kubernetes/scheduler.kubeconfig

Restart=always
RestartSec=10s

[Install]
WantedBy=multi-user.target

EOF

6.3.2启动并查看服务状态

systemctl daemon-reload
systemctl enable --now kube-scheduler
systemctl status kube-scheduler

7.TLS Bootstrapping配置

7.1在master01上配置

cd /root/Kubernetes/bootstrap
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true --server=https://10.0.0.89:8443 \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config set-credentials tls-bootstrap-token-user \
--token=c8ad9c.2e4d610cf3e7426e \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config set-context tls-bootstrap-token-user@kubernetes \
--cluster=kubernetes \
--user=tls-bootstrap-token-user \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config use-context tls-bootstrap-token-user@kubernetes \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
# token的位置在bootstrap.secret.yaml,如果修改的话到这个文件修改
mkdir -p /root/.kube ; cp /etc/kubernetes/admin.kubeconfig /root/.kube/config

7.2查看集群状态,没问题的话继续后续操作

kubectl get cs
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME STATUS MESSAGE ERROR
scheduler Healthy ok 
controller-manager Healthy ok 
etcd-0 Healthy {"health":"true","reason":""} 
etcd-2 Healthy {"health":"true","reason":""} 
etcd-1 Healthy {"health":"true","reason":""} 
kubectl create -f bootstrap.secret.yaml

8.node节点配置

8.1.在master01上将证书复制到node节点

cd /etc/kubernetes/
 
for NODE in k8s-master02 k8s-master03 k8s-node01 k8s-node02; do ssh $NODE mkdir -p /etc/kubernetes/pki; for FILE in pki/ca.pem pki/ca-key.pem pki/front-proxy-ca.pem bootstrap-kubelet.kubeconfig; do scp /etc/kubernetes/$FILE $NODE:/etc/kubernetes/${FILE}; done; done

8.2.kubelet配置

8.2.1所有k8s节点创建相关目录

mkdir -p /var/lib/kubelet /var/log/kubernetes /etc/systemd/system/kubelet.service.d /etc/kubernetes/manifests/
所有k8s节点配置kubelet service
cat > /usr/lib/systemd/system/kubelet.service << EOF

[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes
After=containerd.service
Requires=containerd.service

[Service]
ExecStart=/usr/local/bin/kubelet \
 --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig \
 --kubeconfig=/etc/kubernetes/kubelet.kubeconfig \
 --config=/etc/kubernetes/kubelet-conf.yml \
 --network-plugin=cni \
 --cni-conf-dir=/etc/cni/net.d \
 --cni-bin-dir=/opt/cni/bin \
 --container-runtime=remote \
 --runtime-request-timeout=15m \
 --container-runtime-endpoint=unix:///run/containerd/containerd.sock \
 --cgroup-driver=systemd \
 --node-labels=node.kubernetes.io/node= \
 --feature-gates=IPv6DualStack=true

Restart=always
StartLimitInterval=0
RestartSec=10

[Install]
WantedBy=multi-user.target
EOF

注意若是CentOS7,将 --node-labels=node.kubernetes.io/node='' 替换为 --node-labels=node.kubernetes.io/node= 将 '' 删除

8.2.2所有k8s节点创建kubelet的配置文件

cat > /etc/kubernetes/kubelet-conf.yml <<EOF
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
authentication:
 anonymous:
 enabled: false
 webhook:
 cacheTTL: 2m0s
 enabled: true
 x509:
 clientCAFile: /etc/kubernetes/pki/ca.pem
authorization:
 mode: Webhook
 webhook:
 cacheAuthorizedTTL: 5m0s
 cacheUnauthorizedTTL: 30s
cgroupDriver: systemd
cgroupsPerQOS: true
clusterDNS:
- 10.96.0.10
clusterDomain: cluster.local
containerLogMaxFiles: 5
containerLogMaxSize: 10Mi
contentType: application/vnd.kubernetes.protobuf
cpuCFSQuota: true
cpuManagerPolicy: none
cpuManagerReconcilePeriod: 10s
enableControllerAttachDetach: true
enableDebuggingHandlers: true
enforceNodeAllocatable:
- pods
eventBurst: 10
eventRecordQPS: 5
evictionHard:
 imagefs.available: 15%
 memory.available: 100Mi
 nodefs.available: 10%
 nodefs.inodesFree: 5%
evictionPressureTransitionPeriod: 5m0s
failSwapOn: true
fileCheckFrequency: 20s
hairpinMode: promiscuous-bridge
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 20s
imageGCHighThresholdPercent: 85
imageGCLowThresholdPercent: 80
imageMinimumGCAge: 2m0s
iptablesDropBit: 15
iptablesMasqueradeBit: 14
kubeAPIBurst: 10
kubeAPIQPS: 5
makeIPTablesUtilChains: true
maxOpenFiles: 1000000
maxPods: 110
nodeStatusUpdateFrequency: 10s
oomScoreAdj: -999
podPidsLimit: -1
registryBurst: 10
registryPullQPS: 5
resolvConf: /etc/resolv.conf
rotateCertificates: true
runtimeRequestTimeout: 2m0s
serializeImagePulls: true
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 4h0m0s
syncFrequency: 1m0s
volumeStatsAggPeriod: 1m0s
EOF

8.2.3启动kubelet

systemctl daemon-reload
systemctl restart kubelet
systemctl enable --now kubelet

8.2.4查看集群

[root@k8s-master01 ~]# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master01 Ready <none> 2m33s v1.23.7
k8s-master02 Ready <none> 2m26s v1.23.7
k8s-master03 Ready <none> 2m27s v1.23.7
k8s-node01 Ready <none> 21s v1.23.7
k8s-node02 Ready <none> 21s v1.23.7
[root@k8s-master01 ~]#

8.3.kube-proxy配置

8.3.1此配置只在master01操作

cd /root/Kubernetes/
kubectl -n kube-system create serviceaccount kube-proxy
kubectl create clusterrolebinding system:kube-proxy \
--clusterrole system:node-proxier \
--serviceaccount kube-system:kube-proxy
SECRET=$(kubectl -n kube-system get sa/kube-proxy \
 --output=jsonpath='{.secrets[0].name}')
JWT_TOKEN=$(kubectl -n kube-system get secret/$SECRET \
--output=jsonpath='{.data.token}' | base64 -d)
PKI_DIR=/etc/kubernetes/pki
K8S_DIR=/etc/kubernetes
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://10.0.0.89:8443 \
--kubeconfig=${K8S_DIR}/kube-proxy.kubeconfig
kubectl config set-credentials kubernetes \
--token=${JWT_TOKEN} \
--kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config set-context kubernetes \
--cluster=kubernetes \
--user=kubernetes \
--kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config use-context kubernetes \
--kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig

8.3.2将kubeconfig发送至其他节点

for NODE in k8s-master02 k8s-master03; do scp /etc/kubernetes/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig; done
for NODE in k8s-node01 k8s-node02; do scp /etc/kubernetes/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig; done

8.3.3所有k8s节点添加kube-proxy的配置和service文件

cat > /usr/lib/systemd/system/kube-proxy.service << EOF
[Unit]
Description=Kubernetes Kube Proxy
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/local/bin/kube-proxy \
 --config=/etc/kubernetes/kube-proxy.yaml \
 --v=2

Restart=always
RestartSec=10s

[Install]
WantedBy=multi-user.target

EOF

cat > /etc/kubernetes/kube-proxy.yaml << EOF
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 0.0.0.0
clientConnection:
 acceptContentTypes: ""
 burst: 10
 contentType: application/vnd.kubernetes.protobuf
 kubeconfig: /etc/kubernetes/kube-proxy.kubeconfig
 qps: 5
clusterCIDR: 172.16.0.0/12,fc00::/48 
configSyncPeriod: 15m0s
conntrack:
 max: null
 maxPerCore: 32768
 min: 131072
 tcpCloseWaitTimeout: 1h0m0s
 tcpEstablishedTimeout: 24h0m0s
enableProfiling: false
healthzBindAddress: 0.0.0.0:10256
hostnameOverride: ""
iptables:
 masqueradeAll: false
 masqueradeBit: 14
 minSyncPeriod: 0s
 syncPeriod: 30s
ipvs:
 masqueradeAll: true
 minSyncPeriod: 5s
 scheduler: "rr"
 syncPeriod: 30s
kind: KubeProxyConfiguration
metricsBindAddress: 127.0.0.1:10249
mode: "ipvs"
nodePortAddresses: null
oomScoreAdj: -999
portRange: ""
udpIdleTimeout: 250ms

EOF

8.3.4启动kube-proxy

 systemctl daemon-reload
 systemctl enable --now kube-proxy

9.安装Calico

9.1以下步骤只在master01操作

9.1.1更改calico网段

# vim calico.yaml
vim calico-ipv6.yaml
# calico-config ConfigMap处
 "ipam": {
 "type": "calico-ipam",
 "assign_ipv4": "true",
 "assign_ipv6": "true"
 },
 - name: IP
 value: "autodetect"
 - name: IP6
 value: "autodetect"
 - name: CALICO_IPV4POOL_CIDR
 value: "172.16.0.0/16"
 - name: CALICO_IPV6POOL_CIDR
 value: "fc00::/48"
 - name: FELIX_IPV6SUPPORT
 value: "true"
# kubectl apply -f calico.yaml
kubectl apply -f calico-ipv6.yaml

9.1.2查看容器状态

[root@k8s-master01 ~]# kubectl get pod -A
kube-system calico-kube-controllers-6f6595874c-2j9l8 1/1 Running 0 67s
kube-system calico-node-k8rb4 1/1 Running 0 67s
kube-system calico-node-lkcls 1/1 Running 0 67s
kube-system calico-node-mr8rl 1/1 Running 0 67s
kube-system calico-node-q84pm 1/1 Running 0 67s
kube-system calico-node-v7dwl 1/1 Running 0 67s
kube-system calico-typha-6b6cf8cbdf-cb2wl 1/1 Running 0 67s
[root@k8s-master01 ~]#

10.安装CoreDNS

10.1以下步骤只在master01操作

10.1.1修改文件

cd CoreDNS/
sed -i "s#KUBEDNS_SERVICE_IP#10.96.0.10#g" coredns.yaml
cat coredns.yaml | grep clusterIP:
 clusterIP: 10.96.0.10

10.1.2安装

kubectl create -f coredns.yaml 
serviceaccount/coredns created
clusterrole.rbac.authorization.k8s.io/system:coredns created
clusterrolebinding.rbac.authorization.k8s.io/system:coredns created
configmap/coredns created
deployment.apps/coredns created
service/kube-dns created

11.安装Metrics Server

11.1以下步骤只在master01操作

11.1.1安装Metrics-server

在新版的Kubernetes中系统资源的采集均使用Metrics-server,可以通过Metrics采集节点和Pod的内存、磁盘、CPU和网络的使用率

安装metrics server
cd metrics-server/
kubectl create -f . 
serviceaccount/metrics-server created
clusterrole.rbac.authorization.k8s.io/system:aggregated-metrics-reader created
clusterrole.rbac.authorization.k8s.io/system:metrics-server created
rolebinding.rbac.authorization.k8s.io/metrics-server-auth-reader created
clusterrolebinding.rbac.authorization.k8s.io/metrics-server:system:auth-delegator created
clusterrolebinding.rbac.authorization.k8s.io/system:metrics-server created
service/metrics-server created
deployment.apps/metrics-server created
apiservice.apiregistration.k8s.io/v1beta1.metrics.k8s.io created

11.1.2稍等片刻查看状态

kubectl top node
NAME CPU(cores) CPU% MEMORY(bytes) MEMORY% 
k8s-master01 154m 1% 1715Mi 21% 
k8s-master02 151m 1% 1274Mi 16% 
k8s-master03 523m 6% 1345Mi 17% 
k8s-node01 84m 1% 671Mi 8% 
k8s-node02 73m 0% 727Mi 9%

12.集群验证

12.1部署pod资源

cat<<EOF | kubectl apply -f -
apiVersion: v1
kind: Pod
metadata:
 name: busybox
 namespace: default
spec:
 containers:
 - name: busybox
 image: busybox:1.28
 command:
 - sleep
 - "3600"
 imagePullPolicy: IfNotPresent
 restartPolicy: Always
EOF
# 查看
kubectl get pod
NAME READY STATUS RESTARTS AGE
busybox 1/1 Running 0 17s

12.2用pod解析默认命名空间中的kubernetes

kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 17h
kubectl exec busybox -n default -- nslookup kubernetes
3Server: 10.96.0.10
Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local
Name: kubernetes
Address 1: 10.96.0.1 kubernetes.default.svc.cluster.local

12.3测试跨命名空间是否可以解析

kubectl exec busybox -n default -- nslookup kube-dns.kube-system
Server: 10.96.0.10
Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local
Name: kube-dns.kube-system
Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local

12.4每个节点都必须要能访问Kubernetes的kubernetes svc 443和kube-dns的service 53

telnet 10.96.0.1 443
Trying 10.96.0.1...
Connected to 10.96.0.1.
Escape character is '^]'.
 telnet 10.96.0.10 53
Trying 10.96.0.10...
Connected to 10.96.0.10.
Escape character is '^]'.
curl 10.96.0.10:53
curl: (52) Empty reply from server

12.5Pod和Pod之前要能通

kubectl get po -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
busybox 1/1 Running 0 17m 172.27.14.193 k8s-node02 <none> <none>
 kubectl get po -n kube-system -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
calico-kube-controllers-5dffd5886b-4blh6 1/1 Running 0 77m 172.25.244.193 k8s-master01 <none> <none>
calico-node-fvbdq 1/1 Running 1 (75m ago) 77m 10.0.0.81 k8s-master01 <none> <none>
calico-node-g8nqd 1/1 Running 0 77m 10.0.0.84 k8s-node01 <none> <none>
calico-node-mdps8 1/1 Running 0 77m 10.0.0.85 k8s-node02 <none> <none>
calico-node-nf4nt 1/1 Running 0 77m 10.0.0.83 k8s-master03 <none> <none>
calico-node-sq2ml 1/1 Running 0 77m 10.0.0.82 k8s-master02 <none> <none>
calico-typha-8445487f56-mg6p8 1/1 Running 0 77m 10.0.0.85 k8s-node02 <none> <none>
calico-typha-8445487f56-pxbpj 1/1 Running 0 77m 10.0.0.81 k8s-master01 <none> <none>
calico-typha-8445487f56-tnssl 1/1 Running 0 77m 10.0.0.84 k8s-node01 <none> <none>
coredns-5db5696c7-67h79 1/1 Running 0 63m 172.25.92.65 k8s-master02 <none> <none>
metrics-server-6bf7dcd649-5fhrw 1/1 Running 0 61m 172.18.195.1 k8s-master03 <none> <none>
# 进入busybox ping其他节点上的pod
kubectl exec -ti busybox -- sh
/ # ping 10.0.0.84
PING 10.0.0.84 (10.0.0.84): 56 data bytes
64 bytes from 10.0.0.84: seq=0 ttl=63 time=0.358 ms
64 bytes from 10.0.0.84: seq=1 ttl=63 time=0.668 ms
64 bytes from 10.0.0.84: seq=2 ttl=63 time=0.637 ms
64 bytes from 10.0.0.84: seq=3 ttl=63 time=0.624 ms
64 bytes from 10.0.0.84: seq=4 ttl=63 time=0.907 ms
# 可以连通证明这个pod是可以跨命名空间和跨主机通信的

12.6创建三个副本,可以看到3个副本分布在不同的节点上(用完可以删了)

cat > deployments.yaml << EOF
apiVersion: apps/v1
kind: Deployment
metadata:
 name: nginx-deployment
 labels:
 app: nginx
spec:
 replicas: 3
 selector:
 matchLabels:
 app: nginx
 template:
 metadata:
 labels:
 app: nginx
 spec:
 containers:
 - name: nginx
 image: nginx:1.14.2
 ports:
 - containerPort: 80

EOF
kubectl apply -f deployments.yaml 
deployment.apps/nginx-deployment created
kubectl get pod 
NAME READY STATUS RESTARTS AGE
busybox 1/1 Running 0 6m25s
nginx-deployment-9456bbbf9-4bmvk 1/1 Running 0 8s
nginx-deployment-9456bbbf9-9rcdk 1/1 Running 0 8s
nginx-deployment-9456bbbf9-dqv8s 1/1 Running 0 8s
# 删除nginx
[root@k8s-master01 ~]# kubectl delete -f deployments.yaml

13.安装dashboard

cd dashboard/
kubectl create -f .
serviceaccount/admin-user created
clusterrolebinding.rbac.authorization.k8s.io/admin-user created
namespace/kubernetes-dashboard created
serviceaccount/kubernetes-dashboard created
service/kubernetes-dashboard created
secret/kubernetes-dashboard-certs created
secret/kubernetes-dashboard-csrf created
secret/kubernetes-dashboard-key-holder created
configmap/kubernetes-dashboard-settings created
role.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrole.rbac.authorization.k8s.io/kubernetes-dashboard created
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
deployment.apps/kubernetes-dashboard created
service/dashboard-metrics-scraper created
deployment.apps/dashboard-metrics-scraper created

13.1创建管理员用户

cat > admin.yaml << EOF
apiVersion: v1
kind: ServiceAccount
metadata:
 name: admin-user

 namespace: kube-system
---

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding 
metadata: 
 name: admin-user
 annotations:
 rbac.authorization.kubernetes.io/autoupdate: "true"
roleRef:
 apiGroup: rbac.authorization.k8s.io
 kind: ClusterRole
 name: cluster-admin
subjects:

- kind: ServiceAccount
 name: admin-user
 namespace: kube-system

EOF

13.2执行yaml文件

kubectl apply -f admin.yaml -n kube-system
serviceaccount/admin-user created
clusterrolebinding.rbac.authorization.k8s.io/admin-user created

13.3更改dashboard的svc为NodePort,如果已是请忽略

kubectl edit svc kubernetes-dashboard -n kubernetes-dashboard
 type: NodePort

13.4查看端口号

kubectl get svc kubernetes-dashboard -n kubernetes-dashboard
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes-dashboard NodePort 10.98.201.22 <none> 443:31245/TCP 10m

13.5查看token

kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep admin-user | awk '{print 1ドル}')
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes-dashboard NodePort 10.107.222.221 <none> 443:31824/TCP 30s
[root@k8s-master01 dashboard]# kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep admin-user | awk '{print 1ドル}')
Name: admin-user-token-qfmf6
Namespace: kube-system
Labels: <none>
Annotations: kubernetes.io/service-account.name: admin-user
 kubernetes.io/service-account.uid: 944c5bf6-059a-4e5e-8b18-462956dd0466
Type: kubernetes.io/service-account-token
Data
====
namespace: 11 bytes
token: eyJhbGciOiJSUzI1NiIsImtpZCI6IjZ3RFhuV1U5dmgwbmJESEdHYjR2SUNHeWFjdzMwWnRUb2pYZXNGNUlrb2cifQ.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJrdWJlLXN5c3RlbSIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VjcmV0Lm5hbWUiOiJhZG1pbi11c2VyLXRva2VuLXFmbWY2Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9zZXJ2aWNlLWFjY291bnQubmFtZSI6ImFkbWluLXVzZXIiLCJrdWJlcm5ldGVzLmlvL3NlcnZpY2VhY2NvdW50L3NlcnZpY2UtYWNjb3VudC51aWQiOiI5NDRjNWJmNi0wNTlhLTRlNWUtOGIxOC00NjI5NTZkZDA0NjYiLCJzdWIiOiJzeXN0ZW06c2VydmljZWFjY291bnQ6a3ViZS1zeXN0ZW06YWRtaW4tdXNlciJ9.I7QJPtETU3FuIqQEMyq7T0yC7wsr7-mQSlcxr4qBl3JKqODOdp2t3wBgpE76rb8eHtFb7PdJa5-hmsyDPbtOwXoji2RKkt_ODBX0hpc-cS8OC4VFgTTnQVNTObLn1nP2sPTlAMJHkN5gza1W-lJanpXDwm-pzxUfVyoBn0a_AWwCc7AamhFrkSGHwEyoOFiN7-UuLAfWnjJtiiWWhugQbduzhvO78QGCWHGwewpSZ74qzfZgQftchXhJa_284_L9LhIFyh8qin5eoRZUi0ALz3wHsGD0L8hMXWqqSnHPswO3SkBRUMtt9CNCqDpH9WeNMNyut7m5MAg5I0nWMhggJQ
ca.crt: 1363 bytes

13.6登录dashboard

https://10.0.0.81:31245/

eyJhbGciOiJSUzI1NiIsImtpZCI6IjZ3RFhuV1U5dmgwbmJESEdHYjR2SUNHeWFjdzMwWnRUb2pYZXNGNUlrb2cifQ.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJrdWJlLXN5c3RlbSIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VjcmV0Lm5hbWUiOiJhZG1pbi11c2VyLXRva2VuLXFmbWY2Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9zZXJ2aWNlLWFjY291bnQubmFtZSI6ImFkbWluLXVzZXIiLCJrdWJlcm5ldGVzLmlvL3NlcnZpY2VhY2NvdW50L3NlcnZpY2UtYWNjb3VudC51aWQiOiI5NDRjNWJmNi0wNTlhLTRlNWUtOGIxOC00NjI5NTZkZDA0NjYiLCJzdWIiOiJzeXN0ZW06c2VydmljZWFjY291bnQ6a3ViZS1zeXN0ZW06YWRtaW4tdXNlciJ9.I7QJPtETU3FuIqQEMyq7T0yC7wsr7-mQSlcxr4qBl3JKqODOdp2t3wBgpE76rb8eHtFb7PdJa5-hmsyDPbtOwXoji2RKkt_ODBX0hpc-cS8OC4VFgTTnQVNTObLn1nP2sPTlAMJHkN5gza1W-lJanpXDwm-pzxUfVyoBn0a_AWwCc7AamhFrkSGHwEyoOFiN7-UuLAfWnjJtiiWWhugQbduzhvO78QGCWHGwewpSZ74qzfZgQftchXhJa_284_L9LhIFyh8qin5eoRZUi0ALz3wHsGD0L8hMXWqqSnHPswO3SkBRUMtt9CNCqDpH9WeNMNyut7m5MAg5I0nWMhggJQ

14.ingress安装

14.1写入配置文件,并执行

[root@hello ~/yaml]# vim deploy.yaml
[root@hello ~/yaml]#
[root@hello ~/yaml]#
[root@hello ~/yaml]# cat deploy.yaml
apiVersion: v1
kind: Namespace
metadata:
 name: ingress-nginx
 labels:
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
---
# Source: ingress-nginx/templates/controller-serviceaccount.yaml
apiVersion: v1
kind: ServiceAccount
metadata:
 labels:
 helm.sh/chart: ingress-nginx-4.0.10
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/version: 1.1.0
 app.kubernetes.io/managed-by: Helm
 app.kubernetes.io/component: controller
 name: ingress-nginx
 namespace: ingress-nginx
automountServiceAccountToken: true
---
# Source: ingress-nginx/templates/controller-configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:
 labels:
 helm.sh/chart: ingress-nginx-4.0.10
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/version: 1.1.0
 app.kubernetes.io/managed-by: Helm
 app.kubernetes.io/component: controller
 name: ingress-nginx-controller
 namespace: ingress-nginx
data:
 allow-snippet-annotations: 'true'
---
# Source: ingress-nginx/templates/clusterrole.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
 labels:
 helm.sh/chart: ingress-nginx-4.0.10
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/version: 1.1.0
 app.kubernetes.io/managed-by: Helm
 name: ingress-nginx
rules:
 - apiGroups:
 - ''
 resources:
 - configmaps
 - endpoints
 - nodes
 - pods
 - secrets
 - namespaces
 verbs:
 - list
 - watch
 - apiGroups:
 - ''
 resources:
 - nodes
 verbs:
 - get
 - apiGroups:
 - ''
 resources:
 - services
 verbs:
 - get
 - list
 - watch
 - apiGroups:
 - networking.k8s.io
 resources:
 - ingresses
 verbs:
 - get
 - list
 - watch
 - apiGroups:
 - ''
 resources:
 - events
 verbs:
 - create
 - patch
 - apiGroups:
 - networking.k8s.io
 resources:
 - ingresses/status
 verbs:
 - update
 - apiGroups:
 - networking.k8s.io
 resources:
 - ingressclasses
 verbs:
 - get
 - list
 - watch
---
# Source: ingress-nginx/templates/clusterrolebinding.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
 labels:
 helm.sh/chart: ingress-nginx-4.0.10
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/version: 1.1.0
 app.kubernetes.io/managed-by: Helm
 name: ingress-nginx
roleRef:
 apiGroup: rbac.authorization.k8s.io
 kind: ClusterRole
 name: ingress-nginx
subjects:
 - kind: ServiceAccount
 name: ingress-nginx
 namespace: ingress-nginx
---
# Source: ingress-nginx/templates/controller-role.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
 labels:
 helm.sh/chart: ingress-nginx-4.0.10
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/version: 1.1.0
 app.kubernetes.io/managed-by: Helm
 app.kubernetes.io/component: controller
 name: ingress-nginx
 namespace: ingress-nginx
rules:
 - apiGroups:
 - ''
 resources:
 - namespaces
 verbs:
 - get
 - apiGroups:
 - ''
 resources:
 - configmaps
 - pods
 - secrets
 - endpoints
 verbs:
 - get
 - list
 - watch
 - apiGroups:
 - ''
 resources:
 - services
 verbs:
 - get
 - list
 - watch
 - apiGroups:
 - networking.k8s.io
 resources:
 - ingresses
 verbs:
 - get
 - list
 - watch
 - apiGroups:
 - networking.k8s.io
 resources:
 - ingresses/status
 verbs:
 - update
 - apiGroups:
 - networking.k8s.io
 resources:
 - ingressclasses
 verbs:
 - get
 - list
 - watch
 - apiGroups:
 - ''
 resources:
 - configmaps
 resourceNames:
 - ingress-controller-leader
 verbs:
 - get
 - update
 - apiGroups:
 - ''
 resources:
 - configmaps
 verbs:
 - create
 - apiGroups:
 - ''
 resources:
 - events
 verbs:
 - create
 - patch
---
# Source: ingress-nginx/templates/controller-rolebinding.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
 labels:
 helm.sh/chart: ingress-nginx-4.0.10
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/version: 1.1.0
 app.kubernetes.io/managed-by: Helm
 app.kubernetes.io/component: controller
 name: ingress-nginx
 namespace: ingress-nginx
roleRef:
 apiGroup: rbac.authorization.k8s.io
 kind: Role
 name: ingress-nginx
subjects:
 - kind: ServiceAccount
 name: ingress-nginx
 namespace: ingress-nginx
---
# Source: ingress-nginx/templates/controller-service-webhook.yaml
apiVersion: v1
kind: Service
metadata:
 labels:
 helm.sh/chart: ingress-nginx-4.0.10
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/version: 1.1.0
 app.kubernetes.io/managed-by: Helm
 app.kubernetes.io/component: controller
 name: ingress-nginx-controller-admission
 namespace: ingress-nginx
spec:
 type: ClusterIP
 ports:
 - name: https-webhook
 port: 443
 targetPort: webhook
 appProtocol: https
 selector:
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/component: controller
---
# Source: ingress-nginx/templates/controller-service.yaml
apiVersion: v1
kind: Service
metadata:
 annotations:
 labels:
 helm.sh/chart: ingress-nginx-4.0.10
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/version: 1.1.0
 app.kubernetes.io/managed-by: Helm
 app.kubernetes.io/component: controller
 name: ingress-nginx-controller
 namespace: ingress-nginx
spec:
 type: NodePort
 externalTrafficPolicy: Local
 ipFamilyPolicy: SingleStack
 ipFamilies:
 - IPv4
 ports:
 - name: http
 port: 80
 protocol: TCP
 targetPort: http
 appProtocol: http
 - name: https
 port: 443
 protocol: TCP
 targetPort: https
 appProtocol: https
 selector:
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/component: controller
---
# Source: ingress-nginx/templates/controller-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
 labels:
 helm.sh/chart: ingress-nginx-4.0.10
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/version: 1.1.0
 app.kubernetes.io/managed-by: Helm
 app.kubernetes.io/component: controller
 name: ingress-nginx-controller
 namespace: ingress-nginx
spec:
 selector:
 matchLabels:
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/component: controller
 revisionHistoryLimit: 10
 minReadySeconds: 0
 template:
 metadata:
 labels:
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/component: controller
 spec:
 dnsPolicy: ClusterFirst
 containers:
 - name: controller
 image: registry.cn-hangzhou.aliyuncs.com/chenby/controller:v1.1.3 
 imagePullPolicy: IfNotPresent
 lifecycle:
 preStop:
 exec:
 command:
 - /wait-shutdown
 args:
 - /nginx-ingress-controller
 - --election-id=ingress-controller-leader
 - --controller-class=k8s.io/ingress-nginx
 - --configmap=$(POD_NAMESPACE)/ingress-nginx-controller
 - --validating-webhook=:8443
 - --validating-webhook-certificate=/usr/local/certificates/cert
 - --validating-webhook-key=/usr/local/certificates/key
 securityContext:
 capabilities:
 drop:
 - ALL
 add:
 - NET_BIND_SERVICE
 runAsUser: 101
 allowPrivilegeEscalation: true
 env:
 - name: POD_NAME
 valueFrom:
 fieldRef:
 fieldPath: metadata.name
 - name: POD_NAMESPACE
 valueFrom:
 fieldRef:
 fieldPath: metadata.namespace
 - name: LD_PRELOAD
 value: /usr/local/lib/libmimalloc.so
 livenessProbe:
 failureThreshold: 5
 httpGet:
 path: /healthz
 port: 10254
 scheme: HTTP
 initialDelaySeconds: 10
 periodSeconds: 10
 successThreshold: 1
 timeoutSeconds: 1
 readinessProbe:
 failureThreshold: 3
 httpGet:
 path: /healthz
 port: 10254
 scheme: HTTP
 initialDelaySeconds: 10
 periodSeconds: 10
 successThreshold: 1
 timeoutSeconds: 1
 ports:
 - name: http
 containerPort: 80
 protocol: TCP
 - name: https
 containerPort: 443
 protocol: TCP
 - name: webhook
 containerPort: 8443
 protocol: TCP
 volumeMounts:
 - name: webhook-cert
 mountPath: /usr/local/certificates/
 readOnly: true
 resources:
 requests:
 cpu: 100m
 memory: 90Mi
 nodeSelector:
 kubernetes.io/os: linux
 serviceAccountName: ingress-nginx
 terminationGracePeriodSeconds: 300
 volumes:
 - name: webhook-cert
 secret:
 secretName: ingress-nginx-admission
---
# Source: ingress-nginx/templates/controller-ingressclass.yaml
# We don't support namespaced ingressClass yet
# So a ClusterRole and a ClusterRoleBinding is required
apiVersion: networking.k8s.io/v1
kind: IngressClass
metadata:
 labels:
 helm.sh/chart: ingress-nginx-4.0.10
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/version: 1.1.0
 app.kubernetes.io/managed-by: Helm
 app.kubernetes.io/component: controller
 name: nginx
 namespace: ingress-nginx
spec:
 controller: k8s.io/ingress-nginx
---
# Source: ingress-nginx/templates/admission-webhooks/validating-webhook.yaml
# before changing this value, check the required kubernetes version
# https://kubernetes.io/docs/reference/access-authn-authz/extensible-admission-controllers/#prerequisites
apiVersion: admissionregistration.k8s.io/v1
kind: ValidatingWebhookConfiguration
metadata:
 labels:
 helm.sh/chart: ingress-nginx-4.0.10
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/version: 1.1.0
 app.kubernetes.io/managed-by: Helm
 app.kubernetes.io/component: admission-webhook
 name: ingress-nginx-admission
webhooks:
 - name: validate.nginx.ingress.kubernetes.io
 matchPolicy: Equivalent
 rules:
 - apiGroups:
 - networking.k8s.io
 apiVersions:
 - v1
 operations:
 - CREATE
 - UPDATE
 resources:
 - ingresses
 failurePolicy: Fail
 sideEffects: None
 admissionReviewVersions:
 - v1
 clientConfig:
 service:
 namespace: ingress-nginx
 name: ingress-nginx-controller-admission
 path: /networking/v1/ingresses
---
# Source: ingress-nginx/templates/admission-webhooks/job-patch/serviceaccount.yaml
apiVersion: v1
kind: ServiceAccount
metadata:
 name: ingress-nginx-admission
 namespace: ingress-nginx
 annotations:
 helm.sh/hook: pre-install,pre-upgrade,post-install,post-upgrade
 helm.sh/hook-delete-policy: before-hook-creation,hook-succeeded
 labels:
 helm.sh/chart: ingress-nginx-4.0.10
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/version: 1.1.0
 app.kubernetes.io/managed-by: Helm
 app.kubernetes.io/component: admission-webhook
---
# Source: ingress-nginx/templates/admission-webhooks/job-patch/clusterrole.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
 name: ingress-nginx-admission
 annotations:
 helm.sh/hook: pre-install,pre-upgrade,post-install,post-upgrade
 helm.sh/hook-delete-policy: before-hook-creation,hook-succeeded
 labels:
 helm.sh/chart: ingress-nginx-4.0.10
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/version: 1.1.0
 app.kubernetes.io/managed-by: Helm
 app.kubernetes.io/component: admission-webhook
rules:
 - apiGroups:
 - admissionregistration.k8s.io
 resources:
 - validatingwebhookconfigurations
 verbs:
 - get
 - update
---
# Source: ingress-nginx/templates/admission-webhooks/job-patch/clusterrolebinding.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
 name: ingress-nginx-admission
 annotations:
 helm.sh/hook: pre-install,pre-upgrade,post-install,post-upgrade
 helm.sh/hook-delete-policy: before-hook-creation,hook-succeeded
 labels:
 helm.sh/chart: ingress-nginx-4.0.10
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/version: 1.1.0
 app.kubernetes.io/managed-by: Helm
 app.kubernetes.io/component: admission-webhook
roleRef:
 apiGroup: rbac.authorization.k8s.io
 kind: ClusterRole
 name: ingress-nginx-admission
subjects:
 - kind: ServiceAccount
 name: ingress-nginx-admission
 namespace: ingress-nginx
---
# Source: ingress-nginx/templates/admission-webhooks/job-patch/role.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
 name: ingress-nginx-admission
 namespace: ingress-nginx
 annotations:
 helm.sh/hook: pre-install,pre-upgrade,post-install,post-upgrade
 helm.sh/hook-delete-policy: before-hook-creation,hook-succeeded
 labels:
 helm.sh/chart: ingress-nginx-4.0.10
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/version: 1.1.0
 app.kubernetes.io/managed-by: Helm
 app.kubernetes.io/component: admission-webhook
rules:
 - apiGroups:
 - ''
 resources:
 - secrets
 verbs:
 - get
 - create
---
# Source: ingress-nginx/templates/admission-webhooks/job-patch/rolebinding.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
 name: ingress-nginx-admission
 namespace: ingress-nginx
 annotations:
 helm.sh/hook: pre-install,pre-upgrade,post-install,post-upgrade
 helm.sh/hook-delete-policy: before-hook-creation,hook-succeeded
 labels:
 helm.sh/chart: ingress-nginx-4.0.10
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/version: 1.1.0
 app.kubernetes.io/managed-by: Helm
 app.kubernetes.io/component: admission-webhook
roleRef:
 apiGroup: rbac.authorization.k8s.io
 kind: Role
 name: ingress-nginx-admission
subjects:
 - kind: ServiceAccount
 name: ingress-nginx-admission
 namespace: ingress-nginx
---
# Source: ingress-nginx/templates/admission-webhooks/job-patch/job-createSecret.yaml
apiVersion: batch/v1
kind: Job
metadata:
 name: ingress-nginx-admission-create
 namespace: ingress-nginx
 annotations:
 helm.sh/hook: pre-install,pre-upgrade
 helm.sh/hook-delete-policy: before-hook-creation,hook-succeeded
 labels:
 helm.sh/chart: ingress-nginx-4.0.10
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/version: 1.1.0
 app.kubernetes.io/managed-by: Helm
 app.kubernetes.io/component: admission-webhook
spec:
 template:
 metadata:
 name: ingress-nginx-admission-create
 labels:
 helm.sh/chart: ingress-nginx-4.0.10
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/version: 1.1.0
 app.kubernetes.io/managed-by: Helm
 app.kubernetes.io/component: admission-webhook
 spec:
 containers:
 - name: create
 image: registry.cn-hangzhou.aliyuncs.com/chenby/kube-webhook-certgen:v1.1.1 
 imagePullPolicy: IfNotPresent
 args:
 - create
 - --host=ingress-nginx-controller-admission,ingress-nginx-controller-admission.$(POD_NAMESPACE).svc
 - --namespace=$(POD_NAMESPACE)
 - --secret-name=ingress-nginx-admission
 env:
 - name: POD_NAMESPACE
 valueFrom:
 fieldRef:
 fieldPath: metadata.namespace
 securityContext:
 allowPrivilegeEscalation: false
 restartPolicy: OnFailure
 serviceAccountName: ingress-nginx-admission
 nodeSelector:
 kubernetes.io/os: linux
 securityContext:
 runAsNonRoot: true
 runAsUser: 2000
---
# Source: ingress-nginx/templates/admission-webhooks/job-patch/job-patchWebhook.yaml
apiVersion: batch/v1
kind: Job
metadata:
 name: ingress-nginx-admission-patch
 namespace: ingress-nginx
 annotations:
 helm.sh/hook: post-install,post-upgrade
 helm.sh/hook-delete-policy: before-hook-creation,hook-succeeded
 labels:
 helm.sh/chart: ingress-nginx-4.0.10
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/version: 1.1.0
 app.kubernetes.io/managed-by: Helm
 app.kubernetes.io/component: admission-webhook
spec:
 template:
 metadata:
 name: ingress-nginx-admission-patch
 labels:
 helm.sh/chart: ingress-nginx-4.0.10
 app.kubernetes.io/name: ingress-nginx
 app.kubernetes.io/instance: ingress-nginx
 app.kubernetes.io/version: 1.1.0
 app.kubernetes.io/managed-by: Helm
 app.kubernetes.io/component: admission-webhook
 spec:
 containers:
 - name: patch
 image: registry.cn-hangzhou.aliyuncs.com/chenby/kube-webhook-certgen:v1.1.1 
 imagePullPolicy: IfNotPresent
 args:
 - patch
 - --webhook-name=ingress-nginx-admission
 - --namespace=$(POD_NAMESPACE)
 - --patch-mutating=false
 - --secret-name=ingress-nginx-admission
 - --patch-failure-policy=Fail
 env:
 - name: POD_NAMESPACE
 valueFrom:
 fieldRef:
 fieldPath: metadata.namespace
 securityContext:
 allowPrivilegeEscalation: false
 restartPolicy: OnFailure
 serviceAccountName: ingress-nginx-admission
 nodeSelector:
 kubernetes.io/os: linux
 securityContext:
 runAsNonRoot: true
 runAsUser: 2000
[root@hello ~/yaml]#

14.2启用后端,写入配置文件执行

[root@hello ~/yaml]# vim backend.yaml
[root@hello ~/yaml]# cat backend.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
 name: default-http-backend
 labels:
 app.kubernetes.io/name: default-http-backend
 namespace: kube-system
spec:
 replicas: 1
 selector:
 matchLabels:
 app.kubernetes.io/name: default-http-backend
 template:
 metadata:
 labels:
 app.kubernetes.io/name: default-http-backend
 spec:
 terminationGracePeriodSeconds: 60
 containers:
 - name: default-http-backend
 image: registry.cn-hangzhou.aliyuncs.com/chenby/defaultbackend-amd64:1.5 
 livenessProbe:
 httpGet:
 path: /healthz
 port: 8080
 scheme: HTTP
 initialDelaySeconds: 30
 timeoutSeconds: 5
 ports:
 - containerPort: 8080
 resources:
 limits:
 cpu: 10m
 memory: 20Mi
 requests:
 cpu: 10m
 memory: 20Mi
---
apiVersion: v1
kind: Service
metadata:
 name: default-http-backend
 namespace: kube-system
 labels:
 app.kubernetes.io/name: default-http-backend
spec:
 ports:
 - port: 80
 targetPort: 8080
 selector:
 app.kubernetes.io/name: default-http-backend
[root@hello ~/yaml]#

14.3安装测试应用

[root@hello ~/yaml]# vim ingress-demo-app.yaml
[root@hello ~/yaml]#
[root@hello ~/yaml]# cat ingress-demo-app.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
 name: hello-server
spec:
 replicas: 2
 selector:
 matchLabels:
 app: hello-server
 template:
 metadata:
 labels:
 app: hello-server
 spec:
 containers:
 - name: hello-server
 image: registry.cn-hangzhou.aliyuncs.com/lfy_k8s_images/hello-server
 ports:
 - containerPort: 9000
---
apiVersion: apps/v1
kind: Deployment
metadata:
 labels:
 app: nginx-demo
 name: nginx-demo
spec:
 replicas: 2
 selector:
 matchLabels:
 app: nginx-demo
 template:
 metadata:
 labels:
 app: nginx-demo
 spec:
 containers:
 - image: nginx
 name: nginx
---
apiVersion: v1
kind: Service
metadata:
 labels:
 app: nginx-demo
 name: nginx-demo
spec:
 selector:
 app: nginx-demo
 ports:
 - port: 8000
 protocol: TCP
 targetPort: 80
---
apiVersion: v1
kind: Service
metadata:
 labels:
 app: hello-server
 name: hello-server
spec:
 selector:
 app: hello-server
 ports:
 - port: 8000
 protocol: TCP
 targetPort: 9000
---
apiVersion: networking.k8s.io/v1
kind: Ingress 
metadata:
 name: ingress-host-bar
spec:
 ingressClassName: nginx
 rules:
 - host: "hello.chenby.cn"
 http:
 paths:
 - pathType: Prefix
 path: "/"
 backend:
 service:
 name: hello-server
 port:
 number: 8000
 - host: "demo.chenby.cn"
 http:
 paths:
 - pathType: Prefix
 path: "/nginx" 
 backend:
 service:
 name: nginx-demo
 port:
 number: 8000
[root@hello ~/yaml]#
[root@hello ~/yaml]# kubectl get ingress
NAME CLASS HOSTS ADDRESS PORTS AGE
ingress-demo-app <none> app.demo.com 10.0.0.81 80 20m
ingress-host-bar nginx hello.chenby.cn,demo.chenby.cn 10.0.0.81 80 2m17s
[root@hello ~/yaml]#

14.4执行部署

root@hello:~# kubectl apply -f deploy.yaml 
namespace/ingress-nginx created
serviceaccount/ingress-nginx created
configmap/ingress-nginx-controller created
clusterrole.rbac.authorization.k8s.io/ingress-nginx created
clusterrolebinding.rbac.authorization.k8s.io/ingress-nginx created
role.rbac.authorization.k8s.io/ingress-nginx created
rolebinding.rbac.authorization.k8s.io/ingress-nginx created
service/ingress-nginx-controller-admission created
service/ingress-nginx-controller created
deployment.apps/ingress-nginx-controller created
ingressclass.networking.k8s.io/nginx created
validatingwebhookconfiguration.admissionregistration.k8s.io/ingress-nginx-admission created
serviceaccount/ingress-nginx-admission created
clusterrole.rbac.authorization.k8s.io/ingress-nginx-admission created
clusterrolebinding.rbac.authorization.k8s.io/ingress-nginx-admission created
role.rbac.authorization.k8s.io/ingress-nginx-admission created
rolebinding.rbac.authorization.k8s.io/ingress-nginx-admission created
job.batch/ingress-nginx-admission-create created
job.batch/ingress-nginx-admission-patch created
root@hello:~# 
root@hello:~# kubectl apply -f backend.yaml 
deployment.apps/default-http-backend created
service/default-http-backend created
root@hello:~# 
root@hello:~# kubectl apply -f ingress-demo-app.yaml 
deployment.apps/hello-server created
deployment.apps/nginx-demo created
service/nginx-demo created
service/hello-server created
ingress.networking.k8s.io/ingress-host-bar created
root@hello:~#

14.5过滤查看ingress端口

[root@hello ~/yaml]# kubectl get svc -A | grep ingress
default ingress-demo-app ClusterIP 10.68.231.41 <none> 80/TCP 51m
ingress-nginx ingress-nginx-controller NodePort 10.68.93.71 <none> 80:32746/TCP,443:30538/TCP 32m
ingress-nginx ingress-nginx-controller-admission ClusterIP 10.68.146.23 <none> 443/TCP 32m
[root@hello ~/yaml]#

15.安装命令行自动补全功能

yum install bash-completion -y
source /usr/share/bash-completion/bash_completion
source <(kubectl completion bash)
echo "source <(kubectl completion bash)" >> ~/.bashrc

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