Introduction to Mesos
This tutorial is meant to explain how to create a remote CentOS7 Mesos Master node & a remote CentOS7 Mesos Slave node, including how to configure and test the services (Mesos, ZooKeeper, Marathon), and test the cluster.
I used:
- Mesos Master node: 10.145.6.64 / d1p3920-charles-mesos-master.vchslabs.vmware.com
- Mesos Slave node: 10.145.6.68 / d1p3920-charles-mesos-slave.vchslabs.vmware.com
To create the 2 VMs, I cloned an internal CentOS7 Vagrant template already uploaded on the vCenter
Check out this gist
Check out the official Mesos tutorial and follow the "RedHat 7 / CentOS 7" instructions
Add yum repo
$ rpm -Uvh http://repos.mesosphere.io/el/7/noarch/RPMS/mesosphere-el-repo-7-1.noarch.rpm
Install ZooKeeper
$ yum -y install mesosphere-zookeeper
Install Mesos & Marathon
$ yum -y install mesos marathon
Set the ID /var/lib/zookeeper/myid with an unique integer between 1 and 255 on each node
$ echo "1" > /var/lib/zookeeper/myid
ZooKeeper list of server addresses
$ ifconfig eth0 # get IP address (interface eth0)
$ echo "server.1=MESOS_MASTER_IP:2888:3888" >> /etc/zookeeper/conf/zoo.cfg
$ systemctl start zookeeper
$ ps -aux | grep zookeeper
root 1138 java -Dzookeeper.log.dir=. -Dzookeeper.root.logger=INFO,CONSOLE -cp /opt/mesosphere/zookeeper/bin/...
$ systemctl status zookeeper
zookeeper.service - Apache ZooKeeper
Loaded: loaded (/usr/lib/systemd/system/zookeeper.service; enabled)
Active: active (running) since Sun 2015年05月31日 18:26:57 PDT; 18min ago
Main PID: 1138 (java)
CGroup: /system.slice/zookeeper.service
└─1138 java -Dzookeeper.log.dir=. -Dzookeeper.root.logger=INFO,CONSOLE -cp /opt/mesosphere/zookeeper/bin/../build/classes:/opt/mesosphere/zookeeper/bin/../build/lib/*.jar:/opt/m...
May 31 18:32:51 d1p3920-charles-mesos-master.vchslabs.vmware.com zookeeper[1138]: at sun.nio.ch.SelectionKeyImpl.interestOps(SelectionKeyImpl.java:77)
Make sure ZooKeeper service listens on the port 2181
$ ss -ln |grep 2181
tcp LISTEN 0 50 :::2181 :::*
Mesos Master IP
$ ip addr show eth0 | grep 'inet '
inet 10.145.6.64 brd 10.145.6.255 ...
$ echo "10.145.6.64" > /etc/mesos-master/ip
Mesos Master Hostname
$ nslookup 10.145.6.64
Server: 10.132.71.1
Address: 10.132.71.1#53
64.6.145.10.in-addr.arpa name = d1p3920-charles-mesos-master.vchslabs.vmware.com.
$ echo "d1p3920-charles-mesos-master.vchslabs.vmware.com" > /etc/mesos-master/hostname
Cluster name
echo "charles-cluster" > /etc/mesos-master/cluster
ZooKeeper list of Master's IP
echo "zk://MESOS_MASTER_IP:2181/mesos" > /etc/mesos/zk
Quorum
/etc/mesos-master/quorum should remain 1
$ systemctl stop mesos-slave
$ systemctl disable mesos-slave
rm '/etc/systemd/system/multi-user.target.wants/mesos-slave.service'
Restart the Mesos Master service
$ systemctl restart mesos-master
Test Mesos Master service
$ ps -aux | grep mesos-master
root 2395 /usr/sbin/mesos-master --zk=zk://10.145.6.64:2181/mesos --port=5050 --log_dir=/var/log/mesos --cluster=charles-cluster --hostname=d1p3920-charles-mesos-master.vchslabs.vmware.com. --ip=10.145.6.64 --quorum=1 --work_dir=/var/lib/mesos
$ systemctl status mesos-master
Loaded: loaded (/usr/lib/systemd/system/mesos-master.service; enabled)
Active: active (running) since Sun 2015年05月31日 18:32:34 PDT; 24min ago
Main PID: 2395 (mesos-master)
CGroup: /system.slice/mesos-master.service
├─2395 /usr/sbin/mesos-master --zk=zk://10.145.6.64:2181/mesos --port=5050 --log_dir=/var/log/mesos --cluster=charles-cluster --hostname=d1p3920-charles-mesos-master.vchslabs.vm...
├─2411 logger -p user.info -t mesos-master[2395]
└─2412 logger -p user.err -t mesos-master[2395]
May 31 18:57:10 d1p3920-charles-mesos-master.vchslabs.vmware.com mesos-master[2412]: I0531 18:57:10.816542 2420 master.cpp:2273] Processing ACCEPT call for offers: [ 20150531-183234-10741...
$ systemctl restart marathon.service
$ ps -aux | grep marathon
root java -Djava.library.path=/usr/local/lib:/usr/lib:/usr/lib64 -Djava.util.logging.SimpleFormatter.format=%2$s%5$s%6$s%n -Xmx512m -cp /usr/bin/marathon mesosphere.marathon.Main --zk zk://10.145.6.64:2181/marathon --master zk://10.145.6.64:2181/mesos
$ systemctl status marathon
marathon.service - Marathon
Loaded: loaded (/usr/lib/systemd/system/marathon.service; enabled)
Active: active (running) since Sun 2015年05月31日 18:26:57 PDT; 32min ago
Main PID: 1140 (java)
CGroup: /system.slice/marathon.service
├─1140 java -Djava.library.path=/usr/local/lib:/usr/lib:/usr/lib64 -Djava.util.logging.SimpleFormatter.format=%2$s%5$s%6$s%n -Xmx512m -cp /usr/bin/marathon mesosphere.marathon.M...
├─1199 logger -p user.info -t marathon[1140]
└─1200 logger -p user.notice -t marathon[1140]
May 31 18:58:53 d1p3920-charles-mesos-master.vchslabs.vmware.com marathon[1199]: [2015年05月31日 18:58:53,360] INFO 10.113.229.247 - - [01/Jun/2015:01:58:53 +0000] "GET /v2/apps//hello-marat...
There is no Mesos Slave node registered so far... mesos master console
Add yum repo
$ rpm -Uvh http://repos.mesosphere.io/el/7/noarch/RPMS/mesosphere-el-repo-7-1.noarch.rpm
Install Mesos & telnet (for testing ports)
$ yum -y install mesos telnet
Ping the VM at its IP address
$ ping 10.145.6.64
PING 10.145.6.64 (10.145.6.64) 56(84) bytes of data.
64 bytes from 10.145.6.64: icmp_seq=1 ttl=64 time=0.979 ms
64 bytes from 10.145.6.64: icmp_seq=2 ttl=64 time=0.456 ms
....
Test if the port 2181, used by ZooKeeper on the Mesos Master node, is open
$ telnet 10.145.6.64 2181
Trying 10.145.6.64...
Connected to 10.145.6.64.
Escape character is '^]'.
;
Connection closed by foreign host.
Mesos Slave IP
$ ip addr show eth0 | grep 'inet '
inet 10.145.6.68 brd 10.145.6.255 ...
$ echo "10.145.6.68" > /etc/mesos-slave/ip
Mesos Slave Hostname
$ nslookup 10.145.6.68
Server: 10.132.71.1
Address: 10.132.71.1#53
68.6.145.10.in-addr.arpa name = d1p3920-charles-mesos-slave.vchslabs.vmware.com.
$ echo "d1p3920-charles-mesos-slave.vchslabs.vmware.com" > /etc/mesos-slave/hostname
ZooKeeper list of Master's IP
echo "zk://MESOS_MASTER_IP:2181/mesos" > /etc/mesos/zk
$ systemctl stop mesos-master
$ systemctl disable mesos-master
rm '/etc/systemd/system/multi-user.target.wants/mesos-master.service'
Start Mesos Slave service
$ systemctl restart mesos-slave
Test Mesos Master service
$ ps -aux | grep mesos-slave
root /usr/sbin/mesos-slave --master=zk://10.145.6.64:2181/mesos --log_dir=/var/log/mesos --hostname=d1p3920-charles-mesos-slave.vchslabs.vmware.com. --ip=10.145.6.68
$ systemctl status mesos-slave.service
systemctl status mesos-slave.service
mesos-slave.service - Mesos Slave
Loaded: loaded (/usr/lib/systemd/system/mesos-slave.service; enabled)
Active: active (running) since Sun 2015年05月31日 18:34:06 PDT; 38min ago
Main PID: 32373 (mesos-slave)
CGroup: /system.slice/mesos-slave.service
├─32373 /usr/sbin/mesos-slave --master=zk://10.145.6.64:2181/mesos --log_dir=/var/log/mesos --hostname=d1p3920-charles-mesos-slave.vchslabs.vmware.com. --ip=10.145.6.68
├─32383 logger -p user.info -t mesos-slave[32373]
└─32384 logger -p user.err -t mesos-slave[32373]
May 31 19:02:07 localhost.localdomain mesos-slave[32384]: I0531 19:02:07.241608 32385 slave.cpp:3648] Current disk usage 6.79%. Max allowed age: 5.824677064796389days
A slave node is registered into the Mesos Master
mesos slave0
The 1rst node appears in the list of registered nodes on the master
mesos slave1
Here is the summary of the 1rst Mesos Slave node
mesos slave2
$ mesos-resolve `cat /etc/mesos/zk`
2015年05月31日 19:14:28,941:32455(0x7f0c8a303700):ZOO_INFO@log_env@712: Client environment:zookeeper.version=zookeeper C client 3.4.5
2015年05月31日 19:14:28,941:32455(0x7f0c8a303700):ZOO_INFO@log_env@716: Client environment:host.name=localhost.localdomain
2015年05月31日 19:14:28,941:32455(0x7f0c8a303700):ZOO_INFO@log_env@723: Client environment:os.name=Linux
2015年05月31日 19:14:28,941:32455(0x7f0c8a303700):ZOO_INFO@log_env@724: Client environment:os.arch=3.10.0-123.el7.x86_64
2015年05月31日 19:14:28,941:32455(0x7f0c8a303700):ZOO_INFO@log_env@725: Client environment:os.version=#1 SMP Mon Jun 30 12:09:22 UTC 2014
2015年05月31日 19:14:28,941:32455(0x7f0c8a303700):ZOO_INFO@log_env@733: Client environment:user.name=root
2015年05月31日 19:14:28,941:32455(0x7f0c8a303700):ZOO_INFO@log_env@741: Client environment:user.home=/root
2015年05月31日 19:14:28,941:32455(0x7f0c8a303700):ZOO_INFO@log_env@753: Client environment:user.dir=/etc/mesos-slave
2015年05月31日 19:14:28,941:32455(0x7f0c8a303700):ZOO_INFO@zookeeper_init@786: Initiating client connection, host=10.145.6.64:2181 sessionTimeout=10000 watcher=0x7f0c9155f1e0 sessionId=0 sessionPasswd=<null> context=0x7f0c74001160 flags=0
2015年05月31日 19:14:28,942:32455(0x7f0c858ee700):ZOO_INFO@check_events@1703: initiated connection to server [10.145.6.64:2181]
2015年05月31日 19:14:28,956:32455(0x7f0c858ee700):ZOO_INFO@check_events@1750: session establishment complete on server [10.145.6.64:2181], sessionId=0x14dacbaa0b80013, negotiated timeout=10000
WARNING: Logging before InitGoogleLogging() is written to STDERR
I0531 19:14:28.956903 32463 group.cpp:313] Group process (group(1)@127.0.0.1:49647) connected to ZooKeeper
I0531 19:14:28.956985 32463 group.cpp:790] Syncing group operations: queue size (joins, cancels, datas) = (0, 0, 0)
I0531 19:14:28.957010 32463 group.cpp:385] Trying to create path '/mesos' in ZooKeeper
I0531 19:14:28.959980 32463 detector.cpp:138] Detected a new leader: (id='9')
I0531 19:14:28.960134 32463 group.cpp:659] Trying to get '/mesos/info_0000000009' in ZooKeeper
I0531 19:14:28.961226 32463 detector.cpp:452] A new leading master (UPID=master@10.145.6.64:5050) is detected
10.145.6.64:5050
Best way to test: launch a task through mesos-execute from mesos-slave node
$ export MASTER=$(mesos-resolve `cat /etc/mesos/zk`)
$ echo $MASTER
10.145.6.64:5050
$ mesos-execute --master=$MASTER --name="cluster-test" --command="sleep 5"
I0531 19:15:50.273203 32492 sched.cpp:157] Version: 0.22.1
I0531 19:15:50.277058 32497 sched.cpp:254] New master detected at master@10.145.6.64:5050
I0531 19:15:50.277282 32497 sched.cpp:264] No credentials provided. Attempting to register without authentication
I0531 19:15:50.279747 32497 sched.cpp:448] Framework registered with 20150531-183234-1074172170-5050-2395-0003
Framework registered with 20150531-183234-1074172170-5050-2395-0003
task cluster-test submitted to slave 20150531-183234-1074172170-5050-2395-S0
Received status update TASK_RUNNING for task cluster-test
Received status update TASK_FINISHED for task cluster-test
I0531 19:15:55.405704 32496 sched.cpp:1589] Asked to stop the driver
I0531 19:15:55.405743 32496 sched.cpp:831] Stopping framework '20150531-183234-1074172170-5050-2395-0003'
Under Slaves / Completed Frameworks, the list Completed Executors executed list Executor details showing tasks tasks
$ journalctl -u mesos-slave
Problem
$ mesos-execute --master=$MASTER --name="cluster-test" --command="sleep 5"
**************************************************
Scheduler driver bound to loopback interface! Cannot communicate with remote master(s). You might want to set 'LIBPROCESS_IP' environment variable to use a routable IP address.
**************************************************
Solution: set LIBPROCESS_IP as an env variable
$ export LIBPROCESS_IP=10.145.6.68
Clear the cache saved from prior run
$ systemctl stop mesos-slave
$ rm -f /tmp/mesos/meta/slaves/latest
$ systemctl start mesos-slave
$ systemctl status mesos-slave
The iptables on a CentOS 7 VM should look like this
$ iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination