创建微服务 new-app

vito@caas:~$ oc new-project myci
Already 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.git

to build a new example application in Ruby.

vito@caas:~$ oc get project
NAME      DISPLAY NAME   STATUS
myci                     Active

vito@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: v1
kind: Service
metadata:
  labels:
    app: test-svc
  name: test-svc
  namespace: myci
spec:
  ports:
    - name: test-ci
      port: 8081
      protocol: TCP
      targetPort: 8081
  selector:
    app: test-hello
  sessionAffinity: None
  type: ClusterIP
status:
  loadBalancer: {}

3、执行扩展，把pod数量扩展微两个：

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