条件不满足时如何跳过任务

Question

如果my_environmentvar为“prod”，则让角色执行以下任务以创建cron作业。在

当条件不满足时，我希望剧本跳过该任务，而不是失败：

---
- name: Configure cron job to export patch logs
  cron:
    name: export patch logs daily
    minute: 0
    hour: 0
    user: root
    cron_file: patch_logs
    job: "/usr/local/bin/aws s3 cp /var/log/dpkg.log s3://{{ patch_logs_bucket }}/dpkg.log.$(hostname).$(date +\\%F)"
  when: my_environment == "prod"

失败消息：

^{pr2}$

Answer 1

我们可以使用jinja2快捷方式“default（False）”“d（False）”。在

when: my_environment|d(False) == "prod"

Answer 2

when:

my_environment is defined

my_environment != ”prod”

Answer 3

在这里找到https://ansible-docs.readthedocs.io/zh/stable-2.0/rst/playbooks_conditionals.html#the-when-statement

- shell: echo "This certainly isn't epic!"
  when: not epic

或者

^{pr2}$