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  • 变量定义

    1.访问变量文件

    ---
    - hosts: frame
      remote_user: root
      gather_facts: no
      vars_files:
      - /testdir/ansible/testfile.txt
      tasks:
      - debug:
          msg: "{{key_1}}"

    变量文件:

    [root@frontend-1 mytestvar]# cat /testdir/ansible/testfile.txt
    key_1: values_1

    2.判断文件是否存在

    ---
    - hosts: frame
      tasks:
      - name: check wheather  file exist
        shell: ls   /etc/hosts
        register: ls_result
      - name: when last step succeed , echo ok into file /tmp/1025/hosts
        shell: echo 'ok'  > /tmp/1025/hosts
        when: ls_result.rc == 0

     3.把变量的信息输出

    -name: test
    shell: echo 'hello world'
    - debug: var=PermitRootLogin
    TASK [debug] **********************************************************************************************************************************************************************************
    ok: [10.0.0.4] => {
        "PermitRootLogin": {
            "changed": true,
            "cmd": "egrep 'PermitRootLogin yes' /etc/ssh/sshd_config|wc -l",
            "delta": "0:00:00.052518",
            "end": "2020-11-01 00:05:11.867289",
            "failed": false,
            "rc": 0,
            "start": "2020-11-01 00:05:11.814771",
            "stderr": "",
            "stderr_lines": [],
            "stdout": "1",
            "stdout_lines": [
                "1"
            ]
        }
    }

     4. cat a.j2

    {{ PermitRootLogin['stdout_lines'][0]|type_debug }}

     5.ignore_errors

    - hosts: web_servers
    
      tasks:
    
         - name: Run a shell command and register its output as a variable
           ansible.builtin.shell: /usr/bin/foo
           register: foo_result
           ignore_errors: true
    
         - name: Run a shell command using output of the previous task
           ansible.builtin.shell: /usr/bin/bar
           when: foo_result.rc == 5
    用一个例子来演示会更加清晰
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  • 原文地址:https://www.cnblogs.com/hixiaowei/p/13873110.html
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