根据条件选择变量

Question

我有以下变量：

secureVar:

  cosmosconstr: ""

  postgresUrl: ""

它可以为空或包含数据库 url，具体取决于我需要在 kubernetes 中有条件地创建外部服务：

- name: Get DB data

  when: (secureVars | from_json)['cosmosconstr'] | length == 0 and (secureVars | from_json)['postgresUrl'] | length == 0

  shell: ./python/db_credentials.py -dp {{ deploymentPrefix }}

  register: dbData

- name: Generate external services templates

  when: (secureVars | from_json)['cosmosconstr'] | length == 0 and (secureVars | from_json)['postgresUrl'] | length == 0

  action: template src=k8s/common/external-services.j2 dest=/tmp/k8s-external-svc.yml

  vars:

    cosmosUrl: "{{ dbData.stdout_lines[0] | urlsplit('hostname') }}"

    postgresUrl: "{{ dbData.stdout_lines[1] }}"

- name: Generate external services templates

  when: (secureVars | from_json)['cosmosconstr'] | length > 0 and (secureVars | from_json)['postgresUrl'] | length > 0

  action: template src=k8s/common/external-services.j2 dest=/tmp/k8s-external-svc.yml

  vars:

    cosmosUrl: "{{ ( secureVars | from_json )['cosmosconstr'] | urlsplit('hostname') }}"

    postgresUrl: "{{ ( secureVars | from_json )['postgresUrl'] }}"

这就是我现在正在做的事情，我想设置一个条件，以便如果跳过 dbData 我会使用secureVars，如果没有跳过我会使用 dbData，问题是，我无法检查是否dbData.skipped等于 true，因为如果它没有被跳过，它不包含skipped属性

Answer 1

您可能希望使用默认的 False 值。什么时候： dbData.skiped | 默认（'假'）从 OP 编辑：我最终这样做了："{% if dbData.skipped is defined %}{{ ( secureVars.stdout | from_json )['postgresUrl'] }}{% else %}{{ dbData.stdout_lines[1] }}{% endif %}"