Ansible 模板和神社 {%block%}

Question

我需要在我的 Ansible 角色中使用多个模板文件和 Jinja 的 {% block block_name %} 在远程主机上生成一个文件

例如，

main.conf.j2:

value1 = 123
value2 = 456

{% block test %} {% endblock %}

value3 = 789

{% block example %} {% endblock %}

value4 = abcd

test.conf.j2:

{% block test %}
more text here
{% endblock %}

example.conf.j2

{% block example %}
....
example_param = 'example!'
....
{% endblock %}

下一步是什么？我必须在 test.conf.j2 和 example.conf.j2 中使用 {% extends 'nginx.conf.j2' %} 吗？如果是这样——我的 Ansible 任务会怎样？甚至其他东西？

如果我尝试这样的事情：

- name: Copy config
  template:
    src: "{{ item }}"
    dest: "{{ conf_file_path }}"
  with_items:
    - "main.conf.j2"
    - "test.conf.j2"
    - "example.conf.j2"
    - "abcd.conf.j2"

它仅适用于 main.conf.j2 和 test.conf.j2，但会忽略 example.conf.j2 和其他模板

Answer 1

Q: "What's the next step? I must use {% extends 'nginx.conf.j2' %} ... ?"

答：是的。 extends 是必需的。例如

    - template:
        src: test.j2
        dest: test

使用模板

    shell> cat main.j2
    value1 = 123
    {% block test %}
    value = default value in main.j2
    {% endblock %}
    value3 = 789

    shell> cat test.j2 
    {% extends 'main.j2' %}
    {% block test %}
    value = custom value in test.j2
    {% endblock %}

给予

    shell> cat test 
    value1 = 123
    value = custom value in test.j2
    value3 = 789

Q: "How will look my Ansible task?"

    - name: Copy config
      template:
        src: "{{ item }}"
        dest: "{{ conf_file_path }}"
      with_items:
        - "main.conf.j2"
        - "test.conf.j2"
        - "example.conf.j2"
        - "abcd.conf.j2"

A：循环会在每次迭代中重复覆盖dest文件。参见 template。

FWIW。可以使用 blockinfile and loop the lookup 个模板。例如

    - template:
        src: main2.j2
        dest: test
    - blockinfile:
        marker: "# {mark} ANSIBLE MANAGED BLOCK {{ item }}"
        path: test
        block: "{{ lookup('template', item) }}"
      loop:
        - test.conf.j2
        - example.conf.j2

使用模板

    shell> cat main2.j2
    value1 = 123
    
    # BEGIN ANSIBLE MANAGED BLOCK test.conf.j2
    value_test = default value in main2.j2
    # END ANSIBLE MANAGED BLOCK test.conf.j2
    
    # BEGIN ANSIBLE MANAGED BLOCK example.conf.j2
    value_example = default value in main2.j2
    # END ANSIBLE MANAGED BLOCK example.conf.j2
    
    value3 = 789

    shell> cat test.conf.j2
    value_test = custom value in test.conf.j2

    shell> cat example.conf.j2
    value_example = custom value in example.conf.j2

给予

    shell> cat test 
    value1 = 123
    
    # BEGIN ANSIBLE MANAGED BLOCK test.conf.j2
    value_test = custom value in test.conf.j2
    # END ANSIBLE MANAGED BLOCK test.conf.j2
    
    # BEGIN ANSIBLE MANAGED BLOCK example.conf.j2
    value_example = custom value in example.conf.j2
    # END ANSIBLE MANAGED BLOCK example.conf.j2
    
    value3 = 789

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