openshift 学习笔记-5 template使用

创建微服务 new-app

vito@caas:~$ oc new-project myciAlready on project "myci" on server "https://openshift-cluster.example.com:8443".You can add applications to this project with the 'new-app' command. For example, try:    oc new-app centos/ruby-22-centos7~https://github.com/openshift/ruby-ex.gitto build a new example application in Ruby.vito@caas:~$ oc get projectNAME      DISPLAY NAME   STATUSmyci                     Activevito@caas:~$ oc new-app golang-builder:1.01~http://172.18.103.111/liujunbang/mybank.git --name=test-hello--> Found image 3de3f0e (3 weeks old) in image stream "openshift/golang-builder" under tag "1.01" for "golang-builder:1.01"    builder golang 1.8     ------------------     Platform for building golang    Tags: builder, golang    * A source build using source code from http://172.18.103.111/liujunbang/mybank.git will be created      * The resulting image will be pushed to image stream "test-hello:latest"      * Use 'start-build' to trigger a new build    * This image will be deployed in deployment config "test-hello"    * The image does not expose any ports - if you want to load balance or send traffic to this component      you will need to create a service with 'expose dc/test-hello --port=[port]' later--> Creating resources ...    imagestream "test-hello" created    buildconfig "test-hello" created    deploymentconfig "test-hello" created--> Success    Build scheduled, use 'oc logs -f bc/test-hello' to track its progress.    Run 'oc status' to view your app.

应用创建成功。
1、顺便验证一下service 的功能，此时build完成，部署完成，微服务成功启动，但是没有创建service。此时进入启动的为服务容器内部，env检查环境变量，肯定没有service的信息，因为没有创建。
2、创建service
oc create -f service.yaml
yaml文件内容如下：

apiVersion: v1kind: Servicemetadata:  labels:    app: test-svc  name: test-svc  namespace: mycispec:  ports:    - name: test-ci      port: 8081      protocol: TCP      targetPort: 8081  selector:    app: test-hello  sessionAffinity: None  type: ClusterIPstatus:  loadBalancer: {}

3、执行扩展，把pod数量扩展微两个：

$ oc scale dc test-hello --replicas=2deploymentconfig "test-hello" scaled

4、进入容器内部，查看两个pod的环境变量：
第一个pod：

第二个pod：

我们发现，虽然创建了service，原来的pod里面仍然没有注入service的信息，必须重启pod以后，service的环境变量信息才能注入到pod中。
继续往下template

导出模板template

执行模板导入命令：
oc export bc,dc,svc,is,route -o json –as-template=”test-template” > ~/test-template.yaml
本地生成yaml文件：
test-template.yaml

导入模板 create template

1、模板创建
oc create -f test-template.yaml
2、在web console 中使用模板创建项目,搜索test-template模板

3、创建

4、创建完成

5、查看进度

6、完成后，访问测试微服务