如何在 ansible 中使用 jinja2 模板创建一个包含多个条目的 json 文件？

Question

我正在尝试创建一个 json 具有多个秘密（字典）和存储 class 的文件。但是模板的创建方式是它会创建多个 json 文件，每个文件都有一个秘密和一个存储空间 class。

我的模板 (resources.j2) 如下所示

    "secret": [
    {
      "name": "secret{{ user_name }}",
      "label": "{{ user_name }}",
      "backend": "{{ local_array_ip }}",
      "username": "{{ user_name }}",
      "password": "{{password | default('test123')}}",
      "namespace": "{{ default_namespace }}"
    }
  ],
  "storageclass": [
    {
      "name": "sc{{ user_name }}",
      "secret": "{{ user_name }}",
      "label": "sc-{{ user_name }}",
      "limitMbps": "800",
      "fstype": "xfs",
      "accessProtocol": "{{ protocol }}"
    }
  ]
}

我正在循环调用的库文件中创建 json

- name: Create config files for mulitple users
    include: lib/create_config_for_multiple_users.yaml
    vars:
      user_name: "{{ userName }}{{iterationCount}}"          
    with_sequence: count="5"
    loop_control:
      loop_var: iterationCount

在 Create_config_for_multiple_users.yml 中，它正在为每个用户创建 json 文件（因此总共创建了 5 个 json 文件）。下面给出了从模板创建 json 文件的方法。

- set_fact:
     tmp_dynamic_json_file: "/tmp/temp-json-{{User}}-{{ lookup('pipe', 'date +%Y-%m-%d-%H-%M-%s') }}.json"


- name: Create dynamic Json file with user
  template:
    dest: "{{tmp_dynamic_json_file}}"
    src: "resources.j2"
  delegate_to: localhost

实际上我想要一个 json 包含多个条目的文件，如下所示。

"secret": [
        {
          "name": "secrettest1",
          "label": "test1",
          "backend": "{{ local_array_ip }}",
          "username": "test1",
          "password": "test123",
          "namespace": "kube-system"
        },
        {
          "name": "secrettest2",
          "label": "test2",
          "backend": "{{ local_array_ip }}",
          "username": "test2",
          "password": "test123",
          "namespace": "kube-system"
        }
      ],
      "storageclass": [
        {
          "name": "sctest1",
          "secret": "test1",
          "label": "sc-test1",
          "limitMbps": "800",
          "fstype": "xfs",
          "accessProtocol": "iscsi"
        },
        {
          "name": "sctest2",
          "secret": "test2",
          "label": "sc-test2",
          "limitMbps": "800",
          "fstype": "xfs",
          "accessProtocol": "iscsi"
        }    
      ]
    }

我不知道如何以只创建一个的方式创建模板 json。

Answer 1

您正在包括 create_config_for_multiple_users.yaml 任务，这些任务有效地迭代了 template: 任务。如果模板任务运行多次，它会创建多个模板。在这种情况下，迭代应该在模板内。模板任务应该只有 used/invoked 一次。

请参阅下面的示例剧本。我像你一样包含了一个任务文件，但这没关系。

  vars:
    userName: 'test'
    local_array_ip: '192.168.1.1'
    default_namespace: 'kube-system'
    protocol: 'iscsi'

  tasks:
  - name: Create config files for mulitple users
    include: create_config.yml

然后在我的create_config.yml中，我使用模板模块：

- name: Create dynamic Json file with user
  template:
    dest: '/tmp/resources.json'
    src: 'resources.json.j2'

然后是模板中用户数的迭代resources.json.j2:

{    
  "secret": [
{% for user_num in range(1, 6) %}
    {
      "name": "secret{{ userName }}{{ user_num }}",
      "label": "{{ userName }}{{ user_num }}",
      "backend": "{{ local_array_ip }}",
      "username": "{{ userName }}{{ user_num }}",
      "password": "{{ password | default('test123') }}",
      "namespace": "{{ default_namespace }}"
    }{% if user_num < 5 %},{% endif %}
      
{% endfor %}
    ],
  "storageclass": [ 
{% for user_num in range(1, 6) %}
    {
      "name": "sc{{ userName }}{{ user_num }}",
      "secret": "{{ userName }}{{ user_num }}",
      "label": "sc-{{ userName }}{{ user_num }}",
      "limitMbps": "800",
      "fstype": "xfs",
      "accessProtocol": "{{ protocol }}"
    }{% if user_num < 5 %},{% endif %}
    
{% endfor %}
  ]
}

我正在创建一个目标 JSON 文件，名称简单 /tmp/resources.json（删节）。

{    
  "secret": [
    {
      "name": "secrettest1",
      "label": "test1",
      "backend": "192.168.1.1",
      "username": "test1",
      "password": "test123",
      "namespace": "kube-system"
    },      
    {
      "name": "secrettest2",
      "label": "test2",
      "backend": "192.168.1.1",
      "username": "test2",
      "password": "test123",
     "namespace": "kube-system"
    },      
  "storageclass": [ 
    {
      "name": "sctest1",
      "secret": "test1",
      "label": "sc-test1",
      "limitMbps": "800",
      "fstype": "xfs",
      "accessProtocol": "iscsi"
    },    
    {
      "name": "sctest2",
      "secret": "test2",
      "label": "sc-test2",
      "limitMbps": "800",
      "fstype": "xfs",
      "accessProtocol": "iscsi"
    },

如何在 ansible 中使用 jinja2 模板创建一个包含多个条目的 json 文件？

How to create one json file with multiple entries using jinja2 template in ansible?

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