Question

在我的剧本中，我提供了Jenkins构建ID，如下所示： -e frontend_build_id=43

此ID用于标记在构建过程中创建的Docker映像。稍后，我要删除旧图像，如下所示：

- name: remove old frontend images
  docker_image:
    state: absent
    name: "{{ docker_registry }}/{{ frontend_image_name }}"
    tag: "{{ item }}"
    force: yes
    with_sequence:
      start="{{ frontend_build_id }} - 10" end="{{ frontend_build_id }} - 1" stride=1

但是我遇到以下错误：

TASK [FrontEnd : remove old frontend images] ***********************************
fatal: [10.98.68.116]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'item' is undefined\n\nThe error appears to have been in '/home/jenkins/workspace/myproject_development/roles/FrontEnd/tasks/main.yml': line 31, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: remove old frontend images\n  ^ here\n"}

我该怎么办？
也许以某种方式用loop来实现这一目标更好？

Answer 1

这是您要寻找的顺序吗？

with_sequence:
  start="{{ frontend_build_id - 10 }}" end="{{ frontend_build_id - 1 }}" stride=1

“ 步幅”的默认值为1。为简单起见，可以将其删除。

with_sequence:
  start="{{ frontend_build_id - 10 }}" end="{{ frontend_build_id - 1 }}"

Loop' range '将执行相同的操作。结束元素不包括在内，应递增。

loop: "{{ range(frontend_build_id - 10, frontend_build_id)|list }}"

将变量“ frontend_build_id ”显式转换为整数将使其更可靠。将每个对“ frontend_build_id ”的引用更改为“ frontend_build_id | int ”。例如：

with_sequence:
  start="{{ frontend_build_id|int - 10 }}" end="{{ frontend_build_id|int - 1 }}"

这应该可以解决问题

--'unicode'和'int'的不受支持的操作数类型

Ansible：with_sequence变量的开始和结束

1 个答案: