Ansible内联循环创建列表

huangapple
go评论114阅读模式
英文:

Ansible create a list from a loop inline

问题

我有一个操作手册，内容如下：

  1. - name: 安装 PHP 扩展
  2.   ansible.builtin.apt:
  3.     pkg:
  4.     - php{{ php_version }}{{ item.pkg_extension }}
  5.   loop:
  6.     - { pkg_extension: -mysql }
  7.     - { pkg_extension: -bz2 }
  8.     - { pkg_extension: -curl }
  9.     - { pkg_extension: -gd }
  10.     - { pkg_extension: -imap }
  11.     - { pkg_extension: -mbstring }
  12.     - { pkg_extension: -xml }
  13.     - { pkg_extension: -zip }
  14.   when: php_key_setup is succeeded and nginx_install is succeeded and php_base_install is succeeded
  15.   register: php_install

有时出现我不明白的原因，这个循环中的某个包安装失败。我想将这些包作为列表或字典传递给 apt 模块，就像这样：

  1. - name: 最佳 yum
  2.   ansible.builtin.yum:
  3.     name: "{{ list_of_packages }}"
  4.     state: present

如何从这个循环中创建这个列表，将所有内容连接起来，而不需要额外的步骤来创建这个列表并在之后重复使用它呢？

英文:

I have a playbook that goes like this:

  1.     - name: Install php extensions
  2.       ansible.builtin.apt:
  3.         pkg:
  4.         - php{{ php_version }}{{ item.pkg_extension }}
  5.        loop:
  6.         - { pkg_extension: -mysql }
  7.         - { pkg_extension: -bz2 }
  8.         - { pkg_extension: -curl }
  9.         - { pkg_extension: -gd }
  10.         - { pkg_extension: -imap }
  11.         - { pkg_extension: -mbstring }
  12.         - { pkg_extension: -xml }
  13.         - { pkg_extension: -zip }
  14.       when: php_key_setup is succeeded and nginx_install is succeeded and php_base_install is succeeded
  15.       register: php_install

Sometimes for reasons unknown to me, this fails for one of the packages in the loop. I want to pass these packages as a list or a dictionary to the apt module instead, like in

https://docs.ansible.com/ansible/latest/playbook_guide/playbooks_loops.html#iterating-over-a-simple-list :

  1. - name: Optimal yum
  2.   ansible.builtin.yum:
  3.     name: "{{ list_of_packages }}"
  4.     state: present

How can I create this list from this loop, concatenating everything without adding an extra step to create this list and reuse it afterwards?

答案1

得分: 3

如果您有一个扩展名列表，您可以使用map来对每个项目应用regex_replace过滤器，就像这样：

  1. - hosts: localhost
  2.   gather_facts: false
  3.   vars:
  4.     php_version: 8.3
  5.     php_pkg_extensions:
  6.         - mysql
  7.         - bz2
  8.         - curl
  9.         - gd
  10.         - imap
  11.         - mbstring
  12.         - xml
  13.         - zip
  14.   tasks:
  15.     - name: 安装 PHP 扩展
  16.       ansible.builtin.apt:
  17.         pkg: "{{ packages }}"
  18.       vars:
  19.         packages: >-
  20.           {{
  21.             php_pkg_extensions |
  22.             map('regex_replace', '^(.*)$', 'php%s-\' % (php_version,))
  23.           }}

您不需要php_pkg_extensions变量，但它会使事情更清晰。您可以改为这样编写：

  1. - hosts: localhost
  2.   gather_facts: false
  3.   vars:
  4.     php_version: 8.3
  5.   tasks:
  6.     - name: 安装 PHP 扩展
  7.       ansible.builtin.apt:
  8.         pkg: "{{ packages }}"
  9.       vars:
  10.         packages: >-
  11.           {{
  12.             ["mysql", "bz2", "curl", "gd", "imap", "mbstring", "xml", "zip"] |
  13.             map('regex_replace', '^(.*)$', 'php%s-\' % (php_version,))
  14.           }}
英文:

If you have the list of extensions in a list, you can use map to apply the regex_replace filter to each item, like this:

  1. - hosts: localhost
  2.   gather_facts: false
  3.   vars:
  4.     php_version: 8.3
  5.     php_pkg_extensions:
  6.         - mysql
  7.         - bz2
  8.         - curl
  9.         - gd
  10.         - imap
  11.         - mbstring
  12.         - xml
  13.         - zip
  14.   tasks:
  15.     - name: Install php extensions
  16.       ansible.builtin.apt:
  17.         pkg: "{{ packages }}"
  18.       vars:
  19.         packages: >-
  20.           {{
  21.             php_pkg_extensions |
  22.             map('regex_replace', '^(.*)$', 'php%s-' % (php_version,))
  23.           }}

You don't need the php_pkg_extensions variable, but it makes things much cleaner. You could instead write:

  1. - hosts: localhost
  2.   gather_facts: false
  3.   vars:
  4.     php_version: 8.3
  5.   tasks:
  6.     - name: Install php extensions
  7.       ansible.builtin.apt:
  8.         pkg: "{{ packages }}"
  9.       vars:
  10.         packages: >-
  11.           {{
  12.             ["mysql", "bz2", "curl", "gd", "imap", "mbstring", "xml", "zip"] |
  13.             map('regex_replace', '^(.*)$', 'php%s-' % (php_version,))
  14.           }}

答案2

得分: 2

  1. 给定以下变量
  3. ```yaml
  4.   php_version: 8.3
  5.   php_pkg_extensions:
  6.     - mysql
  7.     - bz2
  8.     - curl
  9.     - gd
  10.     - imap
  11.     - mbstring
  12.     - xml
  13.     - zip

声明列表

  1.   packages: "{{ ['php' ~ php_version]|
  2.                 product(php_pkg_extensions)|
  3.                 map('join', '-') }}"

将得到

  1.   packages:
  2.   - php8.3-mysql
  3.   - php8.3-bz2
  4.   - php8.3-curl
  5.   - php8.3-gd
  6.   - php8.3-imap
  7.   - php8.3-mbstring
  8.   - php8.3-xml
  9.   - php8.3-zip

<hr>

<sup>

用于测试的完整playbook示例

  1. - hosts: localhost
  3.   vars:
  5.     php_version: 8.3
  6.     php_pkg_extensions:
  7.         - mysql
  8.         - bz2
  9.         - curl
  10.         - gd
  11.         - imap
  12.         - mbstring
  13.         - xml
  14.         - zip
  15.     packages: "{{ ['php' ~ php_version]|
  16.                   product(php_pkg_extensions)|
  17.                   map('join', '-') }}"
  19.   tasks:
  21.     - debug:
  22.         var: packages
  24.     - name: 安装php扩展
  25.       ansible.builtin.apt:
  26.         pkg: "{{ packages }}"
  27.       when: install_php_extensions|d(false)|bool

</sup>

  2. <details>
  3. <summary>英文:</summary>
  5. Given the variables
  7. ```yaml
  8.   php_version: 8.3
  9.   php_pkg_extensions:
  10.     - mysql
  11.     - bz2
  12.     - curl
  13.     - gd
  14.     - imap
  15.     - mbstring
  16.     - xml
  17.     - zip

Declare the list

  1.   packages: &quot;{{ [&#39;php&#39; ~ php_version]|
  2.                 product(php_pkg_extensions)|
  3.                 map(&#39;join&#39;, &#39;-&#39;) }}&quot;

gives what you want

  1.   packages:
  2.   - php8.3-mysql
  3.   - php8.3-bz2
  4.   - php8.3-curl
  5.   - php8.3-gd
  6.   - php8.3-imap
  7.   - php8.3-mbstring
  8.   - php8.3-xml
  9.   - php8.3-zip

<hr>

<sup>

Example of a complete playbook for testing

  1. - hosts: localhost
  3.   vars:
  5.     php_version: 8.3
  6.     php_pkg_extensions:
  7.         - mysql
  8.         - bz2
  9.         - curl
  10.         - gd
  11.         - imap
  12.         - mbstring
  13.         - xml
  14.         - zip
  15.     packages: &quot;{{ [&#39;php&#39; ~ php_version]|
  16.                   product(php_pkg_extensions)|
  17.                   map(&#39;join&#39;, &#39;-&#39;) }}&quot;
  19.   tasks:
  21.     - debug:
  22.         var: packages
  24.     - name: Install php extensions
  25.       ansible.builtin.apt:
  26.         pkg: &quot;{{ packages }}&quot;
  27.       when: install_php_extensions|d(false)|bool

</sup>

huangapple
  • 本文由 发表于 2023年7月10日 23:08:31
  • 转载请务必保留本文链接：https://go.coder-hub.com/76655082.html
  • ansible
  • ansible-template
  • jinja2
匿名

发表评论

匿名网友

:?: :razz: :sad: :evil: :!: :smile: :oops: :grin: :eek: :shock: :???: :cool: :lol: :mad: :twisted: :roll: :wink: :idea: :arrow: :neutral: :cry: :mrgreen:

确定