ansible 条件失败时

Question

以下当条件失败并出现解析错误时。

  - name: some task
    debug:
      msg: "{{ansible_host}}"
    when: "({{somevariable}} == 'foo' and ABC_{{bar}}_xyz in group_names) or ({{somevariable}} == 'foo' and ABC_{{bar}}_efg in group_names)"

如果某个变量等于 foo 并且主机属于库存中的几个特定组，我基本上希望此任务运行

错误信息

fatal: [x.x.x.x]: FAILED! => {"msg": "The conditional check '({{somevariable}} == 'foo' and ABC_{{bar}}_xyz in group_names) or ({{somevariable}} == 'foo' and ABC_{{bar}}_efg in group_names)' failed. The error was: error while evaluating conditional (({{somevariable}} == 'foo' and ABC_{{bar}}_xyz in group_names) or ({{somevariable}} == 'foo' and ABC_{{bar}}_efg in group_names)): 'foo' is undefined\n\nThe error appears to be in '/playbooks/playbook.yml': line 23, column 5, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n  - name: some task\n    ^ here\n"}

Answer 1

您不应将{{ }}与when条件一起使用。 请参阅此官方文档。 意味着，您的表达式应如下所示：

when: "(somevariable == 'foo' and 'ABC_' + bar + '_xyz' in group_names) or (somevariable == 'foo' and 'ABC_' + bar + '_efg' in group_names)"