Ansible 检查字典列表中是否存在值

Question

下面是我的变量列表

hostlist:
  - { name: 'host1', ip_addr: '192.168.2.31', hostgrp: 'physical_workstation' }
  - { name: 'host2', ip_addr: '192.168.2.32', hostgrp: 'physical_workstation' }
  - { name: 'host3', ip_addr: '192.168.2.33', hostgrp: 'virtual_machine' }

我踩在下面

- name: Conditional test
  debug:
    msg: "hello world"
  when: hostlist|selectattr("name", "equalto", "host1")|list|length != 0

这不起作用，如下所示错误

The error was: TemplateRuntimeError: no test named 'equalto'

有升级Jinaj2的解决方案。但是有没有其他方法可以代替使用 selectattr.我不想升级 Jinja2

Answer 1

创建名称列表并测试名称是in列表，例如

    - debug:
        msg: "hello world"
      loop:
        - 'host1'
        - 'host9'
      when: item in _names
      vars:
        _names: "{{ hostlist|map(attribute='name')|list }}"

给予

ok: [localhost] => (item=host1) => 
  msg: hello world
skipping: [localhost] => (item=host9)

只检查host1

    - debug:
        msg: "hello world"
      when: "'host1' in _names"
      vars:
        _names: "{{ hostlist|map(attribute='name')|list }}"

给予

ok: [localhost] => (item=host1) => 
  msg: hello world

Ansible 检查字典列表中是否存在值

Ansible check if value exists in dictionary list

jinja2

ansible