本案例演示了如何通过datafoundry平台提供的mysql后端服务来部署wordpress应用,部署流程如下:
为了能够让wordpress自动适配后端服务提供的环境变量,我们对dockerhub官方wordpress镜像进行了微调,先来部署wordpress
oc new-app https://github.com/datafoundry/wordpress.git
--> Found Docker image 10e778c (12 days old) from Docker Hub for "library/php:5.6-apache"
* An image stream will be created as "php:5.6-apache" that will track the source image
* A Docker build using source code from https://github.com/datafoundry/wordpress.git will be created
* The resulting image will be pushed to image stream "wordpress:latest"
* Every time "php:5.6-apache" changes a new build will be triggered
* This image will be deployed in deployment config "wordpress"
* Port 80/tcp will be load balanced by service "wordpress"
* Other containers can access this service through the hostname "wordpress"
* WARNING: Image "wordpress" runs as the 'root' user which may not be permitted by your cluster administrator
--> Creating resources with label app=wordpress ...
imagestream "php" created
imagestream "wordpress" created
buildconfig "wordpress" created
deploymentconfig "wordpress" created
service "wordpress" created
--> Success
Build scheduled, use 'oc logs -f bc/wordpress' to track its progress.
Run 'oc status' to view your app.
查看部署结果
oc get pods
NAME READY STATUS RESTARTS AGE
wordpress-1-build 0/1 Completed 0 3m
wordpress-1-deploy 1/1 Running 0 1m
wordpress-1-hfzhs 0/1 CrashLoopBackOff 3 1m
因为没有提供mysql后端服务,wordpress一直在重启,我们现在来创建mysql backingservice
在通过datafoundry平台生成一个MySQL的后端服务之前我们可以先查看一下目前datafoundry平台已经集成的后端服务
oc get bs -n openshift
注意:
* 后端服务是datafoundry特有功能,所以必须要使用datafoundry客户端连接datafoundry服务端后查看;
* 在查看datafoundry平台已集成的后端时要添加后端服务默认的集成命名空间openshift;
以上命令输出结果为:
NAME LABELS BINDABLE STATUS
Cassandra asiainfo.io/servicebroker=etcd true Active
ETCD asiainfo.io/servicebroker=etcd true Active
Greenplum asiainfo.io/servicebroker=rdb true Active
Kafka asiainfo.io/servicebroker=etcd true Active
MongoDB asiainfo.io/servicebroker=rdb true Active
Mysql asiainfo.io/servicebroker=rdb true Active
PostgreSQL asiainfo.io/servicebroker=rdb true Active
RabbitMQ asiainfo.io/servicebroker=etcd true Active
Redis asiainfo.io/servicebroker=etcd true Active
Spark asiainfo.io/servicebroker=etcd true Active
Storm asiainfo.io/servicebroker=etcd true Active
ZooKeeper asiainfo.io/servicebroker=etcd true Active
可以看到datafoundry平台已经集成非常丰富的后端服务组件,下面我们创建一个Mysql后端服务实例
在创建实例之前,我们要先通过oc describe bs <backingservcie-name> 获取应用所需的后端服务计划(plan),例如我们获取mysql后端服务的服务计划为:
oc describe bs Mysql -n openshift
Name: Mysql
Created: 21 hours ago
Labels: asiainfo.io/servicebroker=rdb
Annotations: <none>
Description: A MYSQL DataBase
Status: Active
Bindable: true
Updateable: false
documentationUrl: http://docs.mysql.com
longDescription: OpenSoure RDMBS Mysql
providerDisplayName: asiainfoLDP
supportUrl: http://www.mysql.com
displayName: Mysql
────────────────────
Plan: Experimental
PlanID: 56660431-6032-43D0-A114-FFA3BF521B66
PlanDesc: share a mysql database in one instance
PlanFree: true
Bullets:
20 GB of Disk
20 connections
PlanCosts:
CostUnit: MONTHLY
Amount:
eur: 49
usd: 99
CostUnit: 1GB of messages over 20GB
Amount:
eur: 0.49
usd: 0.99
我们选取Experimental计划创建mysql后端实例
oc new-backingserviceinstance mysql-inst1 \
--backingservice_name=Mysql \
--planid=56660431-6032-43D0-A114-FFA3BF521B66
Backing Service Instance has been created.
查看后端服务列表
oc get bsi
NAME SERVICE PLAN BOUND STATUS
mysql-inst1 Mysql Experimental 0 Unbound
查看后端服务详细信息
oc describe bsi mysql-inst1
Name: mysql-inst1
Created: 5 minutes ago
Labels: <none>
Annotations: <none>
Status: Unbound
DashboardUrl: http://e412377c9b5f3db:1394e5f077d1519@phpmyadmin-service-broker-db.app.dataos.io?db=8c60f229ef4dac0
BackingServiceName: Mysql
BackingServicePlanName: Experimental
BackingServicePlanGuid: 56660431-6032-43D0-A114-FFA3BF521B66
Parameters:
instance_id: 340082e4-1734-11e6-a653-fa163edcfb45
Bound: 0
Events:
FirstSeen LastSeen Count From SubobjectPath Type Reason Message
--------- -------- ----- ---- ------------- -------- ------ -------
5m 5m 1 {bsi } Normal Provisioning bsi provisioning done, instanceid: 340082e4-1734-11e6-a653-fa163edcfb45
以上服务实例创建完成,我们继续把mysql backingservice绑定到workdpress应用中
oc bind mysql-inst1 wordpress
oc env dc/wordpress MYSQLBSI=MYSQLINST1 BSITYPE=MYSQL
查看部署结果,POD已正常启动,给wordpress生成一个route地址后就可以访问了
oc get pods
NAME READY STATUS RESTARTS AGE
wordpress-1-build 0/1 Completed 0 7m
wordpress-2-55q5a 1/1 Running 0 41s