ansible - 在主机上执行任务的正确方法

Question

我有一个包含以下主机的 list ，如下所示(第一个集群)

[elasticsearch-cluster-india]
elasticsearch-01-mumbai ansible_host=10.0.87.19
elasticsearch-02-mumbai ansible_host=10.0.87.20
elasticsearch-03-mumbai ansible_host=10.0.87.21

我有下面不同的集群

[elasticsearch-cluster-kyrgyzstan]
elasticsearch-01-bishkek ansible_host=10.0.92.2
elasticsearch-02-bishkek ansible_host=10.0.92.3
elasticsearch-03-bishkek ansible_host=10.0.92.4

我想运行以下任务

- name: Set up snapshot cron job
  cron:
    name: "Elasticsearch backup"
    minute: 59
    hour: 23
    job: "{{ es_snapshot_snapshot_script_path }}/snapshot_es.sh"

那么如何仅在我组中的第一台主机上执行此任务？ 我只想在主机 elasticsearch-01-bishkek 和 elasticsearch-01-mumbai

上执行此任务

Answer 1

向主机添加变量:

[elasticsearch-cluster-india]
elasticsearch-01-mumbai ansible_host=10.0.87.19 do_backup=yes
elasticsearch-02-mumbai ansible_host=10.0.87.20
elasticsearch-03-mumbai ansible_host=10.0.87.21

然后检查它:

- name: Set up snapshot cron job
  cron:
    name: "Elasticsearch backup"
    minute: 59
    hour: 23
    job: "{{ es_snapshot_snapshot_script_path }}/snapshot_es.sh"
  when: do_backup|default(false)|bool