建立微服務 new-app

[email protected]:~$ 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.

[email protected]:~$ oc get project
NAME      DISPLAY NAME   STATUS
myci                     Active

[email protected]:~$ 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.

應用建立成功。
1、順便驗證一下service 的功能，此時build完成，部署完成，微服務成功啟動，但是沒有建立service。此時進入啟動的為服務容器內部，env檢查環境變數，肯定沒有service的資訊，因為沒有建立。
2、建立service
oc create -f service.yaml
yaml檔案內容如下：

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、執行擴充套件，把pod數量擴充套件微兩個：

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

4、進入容器內部，檢視兩個pod的環境變數：
第一個pod：

第二個pod：

我們發現，雖然建立了service，原來的pod裡面仍然沒有注入service的資訊，必須重啟pod以後，service的環境變數資訊才能注入到pod中。
繼續往下template

匯出模板template

執行模板匯入命令：
oc export bc,dc,svc,is,route -o json –as-template=”test-template” > ~/test-template.yaml
本地生成yaml檔案：
test-template.yaml

匯入模板 create template

1、模板建立
oc create -f test-template.yaml
2、在web console 中使用模板建立專案,搜尋test-template模板

3、建立

4、建立完成

5、檢視進度

6、完成後，訪問測試微服務