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如何有条件地运行 Ansible 剧本？

[英]How to run Ansible playbook conditionally?

 原文  2020-05-31 15:47:10  0   1    ansible

问题描述

how do i run some playbooks based on condition.我如何根据条件运行一些剧本。 I will explain my current scenario - I have a main yml - main.yml which is importing 4 playbooks with conditions as below -我将解释我目前的情况 - 我有一个主要的 yml - main.yml正在导入 4 个剧本，条件如下 -

---
- import_playbook: current-deployment-status.yml

- import_playbook: current-config-status.yml

- import_playbook: full-deployment.yml
  when: target_release_version != current_release

- import_playbook: only-config-change.yml
  #when: config_var.changed  == true and target_release_version == current_release

The 1st playbook current-deployment-status.yml gets the current release version deployed and register a variable current_release .第一个剧本current-deployment-status.yml获取部署的当前发布版本并注册一个变量current_release 。 Likewise the 2nd playbook do some configuration checks and registers into a variable config_var .同样，第二个剧本做一些配置检查并注册到变量config_var中。

Now based on these 2 variables, I have to execute my further playbooks.现在基于这两个变量，我必须执行我进一步的剧本。 If target_release_version == current_release then I don't want to do the deployment so only execute full-deployment.yml when condition meets as above.如果target_release_version == current_release那么我不想进行部署，所以只有在满足上述条件时才执行full-deployment.yml 。

Likewise, if there is only configuration change required and no deployment: config_var.changed == true and target_release_version == current_release , then execute only-config-change.yml同样，如果只需要更改配置而无需部署： config_var.changed == true and target_release_version == current_release ，则执行only-config-change.yml

Is there a way to execute the playbook only when condition meets otherwise skip it and proceed further.有没有办法仅在条件满足时才执行剧本，否则跳过它并继续进行。

Please let me know if someone can guide me in the right direction请让我知道是否有人可以指导我正确的方向

1 个解决方案

解决方案1
 1  2020-05-31 16:47:24

Yes you can achieve it using set_facts ansible module.是的，您可以使用 set_facts ansible 模块来实现它。

main.yml主.yml

---
- import_playbook: current-deployment-status.yml

- import_playbook: current-config-status.yml

- import_playbook: full-deployment.yml
  when: target_release_version != current_release

- import_playbook: only-config-change.yml
  when: config_var.changed  == true and target_release_version == current_release

current-deployment-status.yml当前部署状态.yml

- name : Playbook current-deployment-status
  hosts: all 
  user: ubuntu 
  gather_facts: True

  tasks:
    - name: echo playbook name 
      shell: echo "current-deployment-status.yml"

    - set_fact:
        current_release: "2"

current-config-status.yml当前配置状态.yml

- name : Playbook current-config-status.yml
  hosts: all 
  user: ubuntu 
  gather_facts: True

  tasks:
    - name: echo playbook name 
      shell: echo "current-config-status.yml"

    - name: task2
      shell: echo "another task"
      register: config_var

    - debug: msg="{{config_var.changed}}"

full-deployment.yml完全部署.yml

- name : Playbook
  hosts: all 
  user: ubuntu 
  gather_facts: True

  tasks:
    - name: echo playbook name 
      shell: echo "full_deployment.yml"

only-config-change.yml仅配置更改.yml

- name : Playbook only-config-change.yml
  hosts: all 
  user: ubuntu 
  gather_facts: True

  tasks:
    - name: echo playbook name 
      shell: echo "only-config-change.yml"

ansible-playbook -i 172.31.6.248, main.yml -v --extra-vars "target_release_version=2" ansible-playbook -i 172.31.6.248, main.yml -v --extra-vars "target_release_version=2"

ubuntu@ip-172-31-38-43:~/ansible_test$ ansible-playbook -i 172.31.6.248, main.yml -v --extra-vars "target_release_version=2"
PLAY [Playbook current-deployment-status] ***********************************************************************************************

TASK [Gathering Facts] ******************************************************************************************************************
ok: [172.31.6.248]

TASK [echo playbook name] ***************************************************************************************************************
changed: [172.31.6.248] => {"changed": true, "cmd": "echo \"current-deployment-status.yml\"", "delta": "0:00:00.002429", "end": "2020-05-31 16:46:29.900240", "rc": 0, "start": "2020-05-31 16:46:29.897811", "stderr": "", "stderr_lines": [], "stdout": "current-deployment-status.yml", "stdout_lines": ["current-deployment-status.yml"]}

TASK [set_fact] *************************************************************************************************************************
ok: [172.31.6.248] => {"ansible_facts": {"current_release": "2"}, "changed": false}

PLAY [Playbook current-config-status.yml] ***********************************************************************************************

TASK [Gathering Facts] ******************************************************************************************************************
ok: [172.31.6.248]

TASK [echo playbook name] ***************************************************************************************************************
changed: [172.31.6.248] => {"changed": true, "cmd": "echo \"current-config-status.yml\"", "delta": "0:00:00.002484", "end": "2020-05-31 16:46:30.776486", "rc": 0, "start": "2020-05-31 16:46:30.774002", "stderr": "", "stderr_lines": [], "stdout": "current-config-status.yml", "stdout_lines": ["current-config-status.yml"]}

TASK [task2] ****************************************************************************************************************************
changed: [172.31.6.248] => {"changed": true, "cmd": "echo \"another task\"", "delta": "0:00:00.002473", "end": "2020-05-31 16:46:31.048677", "rc": 0, "start": "2020-05-31 16:46:31.046204", "stderr": "", "stderr_lines": [], "stdout": "another task", "stdout_lines": ["another task"]}

TASK [debug] ****************************************************************************************************************************
ok: [172.31.6.248] => {
    "msg": true
}

PLAY [Playbook full_deployment.yml] *****************************************************************************************************

TASK [Gathering Facts] ******************************************************************************************************************
skipping: [172.31.6.248] => {"changed": false, "skip_reason": "Conditional result was False"}

TASK [echo playbook name] ***************************************************************************************************************
skipping: [172.31.6.248] => {"changed": false, "skip_reason": "Conditional result was False"}

PLAY [Playbook only-config-change.yml] **************************************************************************************************

TASK [Gathering Facts] ******************************************************************************************************************
ok: [172.31.6.248]

TASK [echo playbook name] ***************************************************************************************************************
changed: [172.31.6.248] => {"changed": true, "cmd": "echo \"only-config-change.yml\"", "delta": "0:00:00.002585", "end": "2020-05-31 16:46:32.017156", "rc": 0, "start": "2020-05-31 16:46:32.014571", "stderr": "", "stderr_lines": [], "stdout": "only-config-change.yml", "stdout_lines": ["only-config-change.yml"]}

PLAY RECAP ******************************************************************************************************************************
172.31.6.248               : ok=9    changed=4    unreachable=0    failed=0

ansible-playbook -i 172.31.6.248, main.yml -v --extra-vars "target_release_version=3" ansible-playbook -i 172.31.6.248, main.yml -v --extra-vars "target_release_version=3"

PLAY [Playbook current-deployment-status] ***********************************************************************************************

TASK [Gathering Facts] ******************************************************************************************************************
ok: [172.31.6.248]

TASK [echo playbook name] ***************************************************************************************************************
changed: [172.31.6.248] => {"changed": true, "cmd": "echo \"current-deployment-status.yml\"", "delta": "0:00:00.002490", "end": "2020-05-31 16:48:28.611482", "rc": 0, "start": "2020-05-31 16:48:28.608992", "stderr": "", "stderr_lines": [], "stdout": "current-deployment-status.yml", "stdout_lines": ["current-deployment-status.yml"]}

TASK [set_fact] *************************************************************************************************************************
ok: [172.31.6.248] => {"ansible_facts": {"current_release": "2"}, "changed": false}

PLAY [Playbook current-config-status.yml] ***********************************************************************************************

TASK [Gathering Facts] ******************************************************************************************************************
ok: [172.31.6.248]

TASK [echo playbook name] ***************************************************************************************************************
changed: [172.31.6.248] => {"changed": true, "cmd": "echo \"current-config-status.yml\"", "delta": "0:00:00.002565", "end": "2020-05-31 16:48:29.440319", "rc": 0, "start": "2020-05-31 16:48:29.437754", "stderr": "", "stderr_lines": [], "stdout": "current-config-status.yml", "stdout_lines": ["current-config-status.yml"]}

TASK [task2] ****************************************************************************************************************************
changed: [172.31.6.248] => {"changed": true, "cmd": "echo \"another task\"", "delta": "0:00:00.002459", "end": "2020-05-31 16:48:29.703006", "rc": 0, "start": "2020-05-31 16:48:29.700547", "stderr": "", "stderr_lines": [], "stdout": "another task", "stdout_lines": ["another task"]}

TASK [debug] ****************************************************************************************************************************
ok: [172.31.6.248] => {
    "msg": true
}

PLAY [Playbook full_deployment.yml] *****************************************************************************************************

TASK [Gathering Facts] ******************************************************************************************************************
ok: [172.31.6.248]

TASK [echo playbook name] ***************************************************************************************************************
changed: [172.31.6.248] => {"changed": true, "cmd": "echo \"full_deployment.yml\"", "delta": "0:00:00.002509", "end": "2020-05-31 16:48:30.610648", "rc": 0, "start": "2020-05-31 16:48:30.608139", "stderr": "", "stderr_lines": [], "stdout": "full_deployment.yml", "stdout_lines": ["full_deployment.yml"]}

PLAY [Playbook only-config-change.yml] **************************************************************************************************

TASK [Gathering Facts] ******************************************************************************************************************
skipping: [172.31.6.248] => {"changed": false, "skip_reason": "Conditional result was False"}

TASK [echo playbook name] ***************************************************************************************************************
skipping: [172.31.6.248] => {"changed": false, "skip_reason": "Conditional result was False"}

PLAY RECAP ******************************************************************************************************************************
172.31.6.248               : ok=9    changed=4    unreachable=0    failed=0

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