如何在 ansible playbook 中循环变量

Question

我有以下剧本，可以打印出安装在三个 jenkins 服务器上的插件列表：

---
- hosts: all
  remote_user: user
  tasks:
      - name: Obtaining a list of Jenkins Plugins
        jenkins_script:
          script: 'println(Jenkins.instance.pluginManager.plugins)'
          url: 'http://server1.usa.com:8080/'
          user: 'admin'
          password: 'password'

      - name: Obtaining a list of Jenkins Plugins
        jenkins_script:
          script: 'println(Jenkins.instance.pluginManager.plugins)'
          url: 'http://server2.usa.com:8080/'
          user: 'admin'
          password: 'password'

      - name: Obtaining a list of Jenkins Plugins
        jenkins_script:
          script: 'println(Jenkins.instance.pluginManager.plugins)'
          url: 'http://server3.usa.com:8080/'
          user: 'admin'
          password: 'password'

但是，这显然不是最有效的方法。我查看了 ansible playbooks 中的循环和变量——但我似乎在绕圈子。这是我目前所拥有的：

- name: Obtaining a list of Jenkins Plugins
  jenkins_script:
    script: 'println(Jenkins.instance.pluginManager.plugins)'
    url: {{ item  }}
    with_items:
      - 'http://server1.usa.com:8080/'
      - 'http://server2.usa.com:8080/'
      - 'http://server3.usa.com:8080/'
    user: 'admin'
    password: 'password'

这是错误信息：

fatal: [server]: FAILED! => {"failed": true, "msg": "the field 'args' has an invalid value, which appears to include a variable that is undefined. The error was: 'item' is undefined\n\nThe error appears to have been in '/home/user/varspb.yml': line 5, column 9, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n  tasks:\n      - name: Obtaining a list of Jenkins Plugins\n        ^ here\n"}

我确定这是一个简单的错误，但有人知道我哪里出错了吗？

Answer 1

如果您的值以{{ item }} 之类的变量开头，则需要引用它以插入变量"{{ item }}"。此外，您的 yaml 和任务块中存在各种格式问题。我设法用这个解决了你的任务：

- name: Obtaining a list of Jenkins Plugins
  jenkins_script:
    script: 'println(Jenkins.instance.pluginManager.plugins)'
    url: "{{ item  }}"
    user: 'admin'
    password: 'password'
  with_items:
    - 'http://server1.usa.com:8080/'
    - 'http://server2.usa.com:8080/'
    - 'http://server3.usa.com:8080/'