4. 示例Ansible Playbook 以下是一个完整的Ansible Playbook示例,演示了如何在任务中实际应用带有多个条件的when语句: yaml --- - name: Example Playbook with Multiple Conditions hosts: all tasks: - name: Install Apache on CentOS 7 or RHEL 7 yum:
如果上述操作对应的Ansible中,也就是一份安装从库的playbook,内部不仅要在从库上执行相关命令,还需要跨机器到主库上执行一些相关命令,类似这种一个任务不是在当前机器执行,而是需要委派到其它机器上执行的操作,就需要用到delegate_to 如下示例,演示了在指定机器增加一条hosts记录解析 - name: add test domain to an...
上面我们曾提到过,module具有“幂等”性,所以当远程主机被人改动时,可以重放playbooks达到恢复的目的。playbooks本身可以识别这种改动,并且有一个基本的event system(事件系统),可以响应这种改动。 (当发生改动时)“notify”这个actions会在playbook的每一个tasks结束时被触发,而且即使有多个不同的tasks通知改动的发生,“...
In the above example, we have first declared the variable named test, and in the task, we are checking the value of the variable. If it is 1, then only the particular task is executed. You can provide when conditions to any number of tasks in the playbook. Examples of Ansible When Gi...
-name:Example playbookhosts:myHostsvars:log_path:/home/ansible/logfolder/log_file:log.logtasks:-name:Create empty log fileansible.builtin.shell:mkdir {{ log_path }} || touch {{log_path }}{{ log_file }}register:tmpchanged_when:-tmp.rc == 0-'tmp.stderr!="mkdir:cannotcreatedirectory...
In this example, the playbook will install the appropriate firewall package based on the operating system distribution of the target host. The "when" condition in Ansible is not limited to just simple comparisons. Users can also use more complex conditions by combining multiple conditions using log...
tasks:-shell:/usr/bin/billybass --mode="take me to the river"register:bass_resultchanged_when:"bass_result.rc!=2"# this will never report 'changed' status-shell:wall 'beep'changed_when:False You can also combine multiple conditions to override “changed” result: ...
PlayBook语法实例 playbook是由一个或多个play组成的列表,play的主要功能在于将事先归并为一组的主机装扮成事先通过Ansible中的tasks定义好的角色(play的内容被称为tasks,即任务),从根本上来讲所谓tasks无非是调用Ansible的一个module,将多个play组织在一个playbook中即可以让它们联同起来按事先编排的机制一同工作. 下...
Find moreansible playbook exampleshere Table of Contents The Ansible when Statement How to use ansible when Statement Example 1: Shutdown the Debian flavoured servers Example 2: Install HTTPD when httpd is not installed already Example 3: [Multiple Conditions in Single when statement] Shutdown only...
playbook是由一个或多个play组成的列表,play的主要功能在于将事先归并为一组的主机装扮成事先通过Ansible中的tasks定义好的角色(play的内容被称为tasks,即任务),从根本上来讲所谓tasks无非是调用Ansible的一个module,将多个play组织在一个playbook中即可以让它们联同...