Question

我正在尝试编写一个ansible脚本，该脚本在同一mongo服务器上的多个数据库上的多个集合上配置相同的id。如何运行with_items $ n次？

集合是已知的，并且MongoDb具有相同的配置名称

我最初使用with_items尝试了几种方法。我认为我应该能够使用with_nested，但似乎不喜欢我如何将$ n格式化为列表。

- set_fact:
    mongo_list: "{{range(1, {{ number_devsims }} + 1) | list}}"

- name: Updating simid
  command: "mongo \"{{ mongo_db_name }}-{{ item[1] }}\" --eval 'db.{{ item[0] }}.update({}, {$set : {simid : \"{{ devsim_eng_simid }}\"}})'"
  with_nested:
    - ['engines', 'servers', 'simulations']
    - "{{ mongo_list}}"

理想情况下，我希望能够为每个mongo更新所有集合。例如

- set_fact:
    mongo_list: [1, 2]

TASK [devsim_data : Updating simid] *********************************************************************************
Wednesday 21 August 2019  10:42:51 -0700 (0:00:07.602)       0:00:37.450 ****** 
 [WARNING]: The loop variable 'item' is already in use. You should set the `loop_var` value in the `loop_control`
option for the task to something else to avoid variable collisions and unexpected behavior.

changed: [eco] => (item=['engines', 1])
changed: [eco] => (item=['engines', 2])
changed: [eco] => (item=['servers', 1])
changed: [eco] => (item=['servers', 2])
changed: [eco] => (item=['simulations', 1])
changed: [eco] => (item=['simulations', 2])

我的set_fact出现的错误是

TASK [devsim_data : set_fact] ***************************************************************************************
Wednesday 21 August 2019  10:50:40 -0700 (0:00:00.066)       0:00:17.668 ****** 
fatal: [eco]: FAILED! => {"msg": "template error while templating string: expected token ':', got '}'. String: {{range(1, {{ number_devsims }} + 1) | list}}"}

Answer 1

问题是您试图将{{标记嵌套在另一个Jinja表达式内：

    mongo_list: "{{range(1, {{ number_devsims }} + 1) | list}}"

由于您已经在Jinja上下文中，所以不需要嵌套{{...}}；这应该是：

    mongo_list: "{{range(1, number_devsims + 1) | list}}"

有了这个修复程序，我认为其他所有事情都应该工作。我将您的command任务包装在一个debug任务中进行测试，如下所示：

---
- hosts: localhost
  gather_facts: false
  vars:
    number_devsims: 2
    mongo_db_name: example
    devsim_eng_simid: example-eng-simid
  tasks:
    - set_fact:
        mongo_list: "{{range(1, number_devsims + 1) | list}}"

    - name: Updating simid
      debug:
        msg:
          command: "mongo \"{{ mongo_db_name }}-{{ item[1] }}\" --eval 'db.{{ item[0] }}.update({}, {$set : {simid : \"{{ devsim_eng_simid }}\"}})'"
      with_nested:
        - ['engines', 'servers', 'simulations']
        - "{{ mongo_list}}"

结果是：

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

TASK [set_fact] ******************************************************************************************************************************************************************************************************************************************************************************
ok: [localhost]

TASK [Updating simid] ************************************************************************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=['engines', 1]) => {
    "msg": {
        "command": "mongo \"example-1\" --eval 'db.engines.update({}, {$set : {simid : \"example-eng-simid\"}})'"
    }
}
ok: [localhost] => (item=['engines', 2]) => {
    "msg": {
        "command": "mongo \"example-2\" --eval 'db.engines.update({}, {$set : {simid : \"example-eng-simid\"}})'"
    }
}
ok: [localhost] => (item=['servers', 1]) => {
    "msg": {
        "command": "mongo \"example-1\" --eval 'db.servers.update({}, {$set : {simid : \"example-eng-simid\"}})'"
    }
}
ok: [localhost] => (item=['servers', 2]) => {
    "msg": {
        "command": "mongo \"example-2\" --eval 'db.servers.update({}, {$set : {simid : \"example-eng-simid\"}})'"
    }
}
ok: [localhost] => (item=['simulations', 1]) => {
    "msg": {
        "command": "mongo \"example-1\" --eval 'db.simulations.update({}, {$set : {simid : \"example-eng-simid\"}})'"
    }
}
ok: [localhost] => (item=['simulations', 2]) => {
    "msg": {
        "command": "mongo \"example-2\" --eval 'db.simulations.update({}, {$set : {simid : \"example-eng-simid\"}})'"
    }
}

PLAY RECAP ***********************************************************************************************************************************************************************************************************************************************************************************
localhost                  : ok=2    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

Ansible循环with_items $ n次

1 个答案: