ansible_facts.packages "skipping"我的包检查

Question

我想检查我的包是否已安装，但我希望所有包类型都有一个名称。

让我解释一下:我正在寻找 OB2 包，但它们有很多，所以我正在寻找 OB2* 但它跳过了我的搜索。

我用不带通配符的名称 (*) 进行了测试，但效果并不好:

- name: Gather the package facts
  ansible.builtin.package_facts:
    manager: auto

- name: Print the package facts
  ansible.builtin.debug:
    var: ansible_facts.packages
    
- name: Check whether a package called OB2 is installed
  ansible.builtin.debug:
    msg: "{{ ansible_facts.packages['OB2*'] | length }} versions of OB2are installed!"
  when: "'OB2*' in ansible_facts.packages"

是否有解决方案可以在 ansible_facts.package 中找到所有以 OB2 开头的输出？

Answer 1

ansible_facts.packages is a dictionary .该字典中没有名为 OB2* 或 OB2 的键，因为没有包具有这个确切的名称。

如果要获取名称以字符串 "OB2" 开头的所有键，一种方法是过滤掉所有其他键。

• 使用 dict2items filter 将您的字典转换为键/值列表
• 使用selectattr filter并申请 match test找到相关条目。
• 由于 key 名称也包含在 value 列表中每个元素内的参数 name 中，您可以只保留 值 使用 map(attribute='someattr') filter
• 最后，flatten the list获取包含所有包版本的单个列表

这是一个说明这个概念的剧本。例如，我将 “zlib” 用作前缀。只需将其改回适合您需要的任何内容即可

 ---
 - hosts: localhost
   gather_facts: false
 
   vars:
     package_prefix: "zlib"
 
     filtered_packages: "{{ ansible_facts.packages | dict2items 
       | selectattr('key', 'match', package_prefix) 
       | map(attribute='value') | flatten }}"
 
   tasks:
     - name: gather package facts
       ansible.builtin.package_facts:
 
     - name: debug the raw variable
       debug:
         var: filtered_packages
 
     - name: count relevant packages
       vars:
         pkg_num: "{{ filtered_packages | count }}"
       debug:
         msg: "There are {{ pkg_num }} packages
           which name starts with {{ package_prefix }}"
 
     - name: show some info about relevant packages
       debug:
         msg: "Package named {{ item.name }} is in category {{ item.category }}
           and has version {{ item.version }}"
       loop: "{{ filtered_packages }}"

在我的 Ubuntu 本地机器上给出:

PLAY [localhost] *****************************************************************************************************************

TASK [gather package facts] ******************************************************************************************************
ok: [localhost]

TASK [debug the raw variable] ****************************************************************************************************
ok: [localhost] => {
    "filtered_packages": [
        {
            "arch": "amd64",
            "category": "libs",
            "name": "zlib1g",
            "origin": "Ubuntu",
            "source": "apt",
            "version": "1:1.2.11.dfsg-2ubuntu1.3"
        },
        {
            "arch": "amd64",
            "category": "libdevel",
            "name": "zlib1g-dev",
            "origin": "Ubuntu",
            "source": "apt",
            "version": "1:1.2.11.dfsg-2ubuntu1.3"
        }
    ]
}

TASK [count relevant packages] ***************************************************************************************************
ok: [localhost] => {
    "msg": "There are 2 packages which name starts with zlib"
}

TASK [show some info about relevant packages] ************************************************************************************
ok: [localhost] => (item={'name': 'zlib1g', 'version': '1:1.2.11.dfsg-2ubuntu1.3', 'arch': 'amd64', 'category': 'libs', 'origin': 'Ubuntu', 'source': 'apt'}) => {
    "msg": "Package named zlib1g is in category libs and has version 1:1.2.11.dfsg-2ubuntu1.3"
}
ok: [localhost] => (item={'name': 'zlib1g-dev', 'version': '1:1.2.11.dfsg-2ubuntu1.3', 'arch': 'amd64', 'category': 'libdevel', 'origin': 'Ubuntu', 'source': 'apt'}) => {
    "msg": "Package named zlib1g-dev is in category libdevel and has version 1:1.2.11.dfsg-2ubuntu1.3"
}

PLAY RECAP ***********************************************************************************************************************
localhost                  : ok=4    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0