5.4.3.2. 在本地测试 k8s Ansible 模块

流程

1. 安装 community.kubernetes 集合：

   $ ansible-galaxy collection install community.kubernetes

2. 初始化基于 Ansible 的新 Operator 项目：

   $ operator-sdk new --type ansible \
       --kind Test1 \
       --api-version test1.example.com/v1alpha1 test1-operator

   输出示例

   Create test1-operator/tmp/init/galaxy-init.sh
   Create test1-operator/tmp/build/Dockerfile
   Create test1-operator/tmp/build/test-framework/Dockerfile
   Create test1-operator/tmp/build/go-test.sh
   Rendering Ansible Galaxy role [test1-operator/roles/test1]...
   Cleaning up test1-operator/tmp/init
   Create test1-operator/watches.yaml
   Create test1-operator/deploy/rbac.yaml
   Create test1-operator/deploy/crd.yaml
   Create test1-operator/deploy/cr.yaml
   Create test1-operator/deploy/operator.yaml
   Run git init ...
   Initialized empty Git repository in /home/user/go/src/github.com/user/opsdk/test1-operator/.git/
   Run git init done

   $ cd test1-operator

3. 使用您想要的 Ansible 逻辑来修改 roles/test1/tasks/main.yml 文件。本示例通过变量切换来创建和删除命名空间。

   - name: set test namespace to "{{ state }}"
     community.kubernetes.k8s:
       api_version: v1
       kind: Namespace
       state: "{{ state }}"
       name: test
     ignore_errors: true 1

   1

   设置 ignore_errors: true 可确保删除不存在的项目不会失败。

4. 修改 roles/test1/defaults/main.yml 文件，将默认 state 设置为 present:

   state: present

5. 在顶层目录中创建一个 Ansible playbook playbook.yml 文件，其中包含 test1 角色：

   - hosts: localhost
     roles:
       - test1

6. 运行 playbook：

   $ ansible-playbook playbook.yml

   输出示例

    [WARNING]: provided hosts list is empty, only localhost is available. Note that the implicit localhost does not match 'all'
   
   PLAY [localhost] ***************************************************************************
   
   PROCEDURE [Gathering Facts] *********************************************************************
   ok: [localhost]
   
   Task [test1 : set test namespace to present]
   changed: [localhost]
   
   PLAY RECAP *********************************************************************************
   localhost                  : ok=2    changed=1    unreachable=0    failed=0

7. 检查是否已创建命名空间：

   $ oc get namespace

   输出示例

   NAME          STATUS    AGE
   default       Active    28d
   kube-public   Active    28d
   kube-system   Active    28d
   test          Active    3s

8. 重新运行 playbook，设置 state 为 absent：

   $ ansible-playbook playbook.yml --extra-vars state=absent

   输出示例

    [WARNING]: provided hosts list is empty, only localhost is available. Note that the implicit localhost does not match 'all'
   
   PLAY [localhost] ***************************************************************************
   
   PROCEDURE [Gathering Facts] *********************************************************************
   ok: [localhost]
   
   Task [test1 : set test namespace to absent]
   changed: [localhost]
   
   PLAY RECAP *********************************************************************************
   localhost                  : ok=2    changed=1    unreachable=0    failed=0

9. 检查是否已删除命名空间：

   $ oc get namespace

   输出示例

   NAME          STATUS    AGE
   default       Active    28d
   kube-public   Active    28d
   kube-system   Active    28d