openshift 学习笔记-5 template使用

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