Ansible - 检查项目列表

Ansible - 检查项目列表

我有一些期望在某些命令的输出中包含的字符串列表。如何创建一个 ansible 脚本来测试并在其中一个或多个条目不包含的情况下执行任务?

因此我的 ansible 脚本可能如下所示:

vars:
  musthave:
    - value1
    - value2
tasks:
- name: Check the configured values
  command: "cat configfile"
  register: current_configuration
  changed_when: false

- set a variable if one or more of the musthave's are missing in current_configuration.stdout
  ...

- name: Execute task to reconfigure system
  command: "reconfigure..."
  when: true = variable

那么有没有类似的东西

variable = false
for s in musthave:
    if not s in current_configuration.stdout:
        variable |= true

答案1

虽然使用建议的社区模块可能更容易解决问题,但我更喜欢不意味着要安装更多库的解决方案。以下是我想出的解决方案。

我最初的请求是检查命令输出中可能出现的特定值是否存在。准备一个列表来计算差异是一个缺点,但副作用是您可以计算两个方向上的差异。

所以现在我不仅可以检查缺失的条目,还可以检查过多的条目。

- name: print hostvars
  debug:
    var: hostvars[{{ ansible_host }}]['certificate_domains']

- name: print certificate
  delegate_to: silver.fritz.box
  command: "openssl x509 -in /home/hiran/homeserver.crt -noout -text"
  register: certificate

- name: grab subject's common name and alternative names
  set_fact:
    commonName: "{{ certificate.stdout | regex_search('Subject.*CN\\s=\\s([\\.a-zA-Z]+)', '\\1') }}"
    altNames: "{{ certificate.stdout | regex_findall('DNS:([\\.a-zA-Z]+)') }}"
- name: prepare the lists so they can be subtracted from each other
  set_fact:
    contained: "{{ (commonName + altNames) | unique }}"
    musthave: "{{ hostvars[{{ ansible_host }}]['certificate_domains'] | unique }}"
- name: calculate differences
  set_fact:
    missing: "{{ musthave | difference(contained) }}"
    toomuch: "{{ contained | difference(musthave) }}"

- name: show difference
  debug:
    msg: Something is wrong
  when: (missing | length)>0 or (toomuch | length)>0

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