Ansible的k8s模块完全兼容OpenShift资源

Ansible和Openshift

Ansible的k8s模块完全兼容openshift资源

安装

使用k8s模块需要安装openshift的python扩展

$ pip install --ignore-installed openshift

安装过程中报如下错误
TypeError: find_packages() got an unexpected keyword argument include
需要升级setuptools

$ pip install -U setuptools

在执行k8s命令的主机上登录kubernetes/openshift平台

$ oc login https://master.example.com:8443 -u admin -p
password

测试

使用ansible k8s模块创建namespace

$ oc -i hosts all -m k8s -a 'state=present name=testproject kind=Project'

使用ansible k8s模块基于dc.yaml文件创建dc

1. 创建dc.yaml文件

$ oc run nginx --image=nginx -n testproject --dry-run -o yaml

将内容输入到nginx-dc.yaml文件中,去掉些默认值，添加namespace

$ cat nginx-dc.yaml
apiVersion: v1
kind: DeploymentConfig
metadata:
  labels:
    run: nginx
  name: nginx
  namespace: testproject
spec:
  replicas: 1
  selector:
    run: nginx
  template:
    metadata:
      labels:
        run: nginx
    spec:
      containers:
      - image: nginx
        name: nginx

2. 使用ansible创建

$ ansible -i hosts all -m k8s -a 'state=present src=/root/sample/nginx-dc.yaml'

使用ansible k8s模块基于模板文件创建dc

1. 创建playbook文件

---
- hosts: all
  tasks: 
  - name: create nginx yaml
    k8s:
      state: present
      definition: "{{ lookup('template', '/root/sample/dc.yaml') | from_yaml }}"
EOF

2. 使用ansible-playbook创建nginx应用

$ ansible-playbook -i hosts playbook.yaml

删除nginx DeploymentConfig

$ ansible -i hosts all -m k8s -a 'state=absent kind=DeploymentConfig namespace=testproject name=nginx'