Ansible 检查命令的输出，如果字符串与条件匹配，则返回不正确的值

Question

我编写了一个剧本来检查命令“docker ps --all”输出，然后检查行输出中是否有名称“ansiblecontrol”，然后获取图像的值。这是我的剧本：

---
- name: Check and update Docker toolkit status
  hosts: dockerhost0
  become: yes
  become_method: su

  tasks:
    - name: Check list of docker containers in host
      command: docker ps --all
      register: docker_ps_output

    - name: Debug Docker output
      debug:
        msg: "{{ docker_ps_output.stdout_lines }}"

    - name: Set fact based on command output
      set_fact:
        toolstatus: >-
          {% set found = 'unavailable' %}
          {% for line in docker_ps_output.stdout_lines %}
            {% if 'ansiblecontroll' in line %}
              {% set parts = line.split() %}
              {% set found = parts[1] %}
            {% endif %}
          {% endfor %}
          {{ found }}

    - name: Debug toolstatus
      debug:
        msg: "Toolstatus is set to: {{ toolstatus }}"

这是输出：

TASK [Check list of docker containers in host] **************************************************************************************************************************
changed: [dockerhost0]

TASK [Debug Docker output] **********************************************************************************************************************************************
ok: [dockerhost0] => {
    "msg": [
        "CONTAINER ID  IMAGE                                       COMMAND    CREATED       STATUS           PORTS  NAMES", 
        "468bc9a43749  localhost/toolac.di.1.0.0.2024.28.2:latest  /bin/bash  3 weeks ago   Up 3 weeks ago          ansiblecontrol", 
        "ad73b324913e  localhost/toolac.di.1.0.0.2024.12.4:latest  /bin/bash  3 months ago  Up 3 months ago         acnode"
    ]
}

TASK [Set fact based on command output] *********************************************************************************************************************************
ok: [dockerhost0]

TASK [Debug toolstatus] *************************************************************************************************************************************************
ok: [dockerhost0] => {
    "msg": "Toolstatus is set to:                   unavailable"
}

尽管输出中出现字符串“ansiblecontrol”，但返回值不正确。我的条件处理代码有什么问题？返回值应该是“localhost/toolac.di.1.0.0.2024.28.2:latest”而不是“unavailable”

Answer 1

如果您的目标是“找到用于

anisblecontrol

容器的图像（如果存在）”，那么最简单的解决方案将是这样的：

- hosts: localhost
  gather_facts: false
  tasks:
  - name: get information about ansiblecontrol container
    docker_container_info:
      name: ansiblecontrol
    register: container

  - debug:
      var: container.container.Config.Image

这依赖于

community.docker

集合。它将成功检索有关

anisblecontrol

容器的信息（在这种情况下，您可以获取如图所示的图像名称），或者第一个任务将失败，因为容器不存在。