Loading... <blockquote>在本博客中,ansible是一个系列文章,我们会尽量以通俗易懂的方式总结ansible的相关知识点。 ansible系列博文直达链接:<a href="https://www.zsythink.net/archives/tag/ansible/" target="_blank" rel="noopener">ansible轻松入门系列</a> “ansible系列”中的每篇文章都建立在前文的基础之上,所以,请按照顺序阅读这些文章,否则有可能在阅读中遇到障碍。</blockquote> 现在我有一个需求,我需要使用ansible在目标主机中创建5个目录,这5个目录的名字是test2、test4、test6、test8、test10,我该怎么办呢?当然,我可以使用shell模块执行一条命令去完成,但是我们现在正在总结”循环”的使用方法,所以,我要用循环完成这个需求,使用循环完成这个任务很简单,我们只需要借助一个循环的关键字,它就是”with_sequence”,放开刚才的需求不说,我们先来看一个”with_sequence”的小示例,示例playbook如下: <div class="enlighter-default enlighter-v-standard enlighter-t-enlighter enlighter-hover enlighter-overflow-scroll"> <div class="enlighter-toolbar"> <div class="enlighter-btn enlighter-btn-raw"></div> <div class="enlighter-btn enlighter-btn-copy"></div> <div class="enlighter-btn enlighter-btn-window"></div> </div> <div class="enlighter"> <div class=""> <div><span class="enlighter-text">---</span></div> </div> <div class=""> <div><span class="enlighter-text">- hosts: test70</span></div> </div> <div class=""> <div><span class="enlighter-text"> remote_user: root</span></div> </div> <div class=""> <div><span class="enlighter-text"> gather_facts: no</span></div> </div> <div class=""> <div><span class="enlighter-text"> tasks:</span></div> </div> <div class=""> <div><span class="enlighter-text"> - debug:</span></div> </div> <div class=""> <div><span class="enlighter-text"> msg: </span><span class="enlighter-s0">"{{ item }}"</span></div> </div> <div class=""> <div><span class="enlighter-text"> with_sequence: start=</span><span class="enlighter-n1">1</span> <span class="enlighter-k1">end</span><span class="enlighter-text">=</span><span class="enlighter-n1">5</span><span class="enlighter-text"> stride=</span><span class="enlighter-n1">1</span></div> </div> </div> </div> 我们先不用纠结上例的”with_sequence”设置是什么意思,我们先来看一下上例的执行效果,先执上述playbook后,debug模块的输出结果如下 <div class="enlighter-default enlighter-v-standard enlighter-t-enlighter enlighter-hover enlighter-overflow-scroll"> <div class="enlighter-toolbar"> <div class="enlighter-btn enlighter-btn-raw"></div> <div class="enlighter-btn enlighter-btn-copy"></div> <div class="enlighter-btn enlighter-btn-window"></div> </div> <div class="enlighter"> <div class=""> <div><span class="enlighter-text">TASK </span><span class="enlighter-g1">[</span><span class="enlighter-text">debug</span><span class="enlighter-g1">]</span> <span class="enlighter-g0">***************************</span></div> </div> <div class=""> <div><span class="enlighter-text">ok: </span><span class="enlighter-g1">[</span><span class="enlighter-text">test70</span><span class="enlighter-g1">]</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">(</span><span class="enlighter-text">item=</span><span class="enlighter-n1">1</span><span class="enlighter-g1">)</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">{</span></div> </div> <div class=""> <div><span class="enlighter-s0">"changed"</span><span class="enlighter-text">: </span><span class="enlighter-k1">false</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"item"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"1"</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"msg"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"1"</span></div> </div> <div class=""> <div><span class="enlighter-g1">}</span></div> </div> <div class=""> <div><span class="enlighter-text">ok: </span><span class="enlighter-g1">[</span><span class="enlighter-text">test70</span><span class="enlighter-g1">]</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">(</span><span class="enlighter-text">item=</span><span class="enlighter-n1">2</span><span class="enlighter-g1">)</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">{</span></div> </div> <div class=""> <div><span class="enlighter-s0">"changed"</span><span class="enlighter-text">: </span><span class="enlighter-k1">false</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"item"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"2"</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"msg"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"2"</span></div> </div> <div class=""> <div><span class="enlighter-g1">}</span></div> </div> <div class=""> <div><span class="enlighter-text">ok: </span><span class="enlighter-g1">[</span><span class="enlighter-text">test70</span><span class="enlighter-g1">]</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">(</span><span class="enlighter-text">item=</span><span class="enlighter-n1">3</span><span class="enlighter-g1">)</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">{</span></div> </div> <div class=""> <div><span class="enlighter-s0">"changed"</span><span class="enlighter-text">: </span><span class="enlighter-k1">false</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"item"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"3"</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"msg"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"3"</span></div> </div> <div class=""> <div><span class="enlighter-g1">}</span></div> </div> <div class=""> <div><span class="enlighter-text">ok: </span><span class="enlighter-g1">[</span><span class="enlighter-text">test70</span><span class="enlighter-g1">]</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">(</span><span class="enlighter-text">item=</span><span class="enlighter-n1">4</span><span class="enlighter-g1">)</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">{</span></div> </div> <div class=""> <div><span class="enlighter-s0">"changed"</span><span class="enlighter-text">: </span><span class="enlighter-k1">false</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"item"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"4"</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"msg"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"4"</span></div> </div> <div class=""> <div><span class="enlighter-g1">}</span></div> </div> <div class=""> <div><span class="enlighter-text">ok: </span><span class="enlighter-g1">[</span><span class="enlighter-text">test70</span><span class="enlighter-g1">]</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">(</span><span class="enlighter-text">item=</span><span class="enlighter-n1">5</span><span class="enlighter-g1">)</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">{</span></div> </div> <div class=""> <div><span class="enlighter-s0">"changed"</span><span class="enlighter-text">: </span><span class="enlighter-k1">false</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"item"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"5"</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"msg"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"5"</span></div> </div> <div class=""> <div><span class="enlighter-g1">}</span></div> </div> </div> </div> 如输出信息所示,debug模块被循环调用了5次,msg的值从1一直输出到了5,值的大小每次增加1,没错,这正是”with_sequence”关键字的作用,”with_sequence”可以帮助我们按照顺序生成数字序列,上例的playbook中,with_sequence的设置是”start=1 end=5 stride=1″,其中start=1表示从1开始,end=5表示到5结束, stride=1表示步长为1,即从1到5每次增加1。 我们也可以换一种书写格式,如下格式如上例中的格式效果相同 <div class="enlighter-default enlighter-v-standard enlighter-t-enlighter enlighter-hover enlighter-overflow-scroll"> <div class="enlighter-toolbar"> <div class="enlighter-btn enlighter-btn-raw"></div> <div class="enlighter-btn enlighter-btn-copy"></div> <div class="enlighter-btn enlighter-btn-window"></div> </div> <div class="enlighter"> <div class=""> <div><span class="enlighter-text"> with_sequence:</span></div> </div> <div class=""> <div><span class="enlighter-text"> start=</span><span class="enlighter-n1">1</span></div> </div> <div class=""> <div><span class="enlighter-k1">end</span><span class="enlighter-text">=</span><span class="enlighter-n1">5</span></div> </div> <div class=""> <div><span class="enlighter-text"> stride=</span><span class="enlighter-n1">1</span></div> </div> </div> </div> 其实,还有一种更简单的写法,能够生成连续的数字序列,写法如下: <div class="enlighter-default enlighter-v-standard enlighter-t-enlighter enlighter-hover enlighter-overflow-scroll"> <div class="enlighter-toolbar"> <div class="enlighter-btn enlighter-btn-raw"></div> <div class="enlighter-btn enlighter-btn-copy"></div> <div class="enlighter-btn enlighter-btn-window"></div> </div> <div class="enlighter"> <div class=""> <div><span class="enlighter-text">---</span></div> </div> <div class=""> <div><span class="enlighter-text">- hosts: test70</span></div> </div> <div class=""> <div><span class="enlighter-text"> remote_user: root</span></div> </div> <div class=""> <div><span class="enlighter-text"> gather_facts: no</span></div> </div> <div class=""> <div><span class="enlighter-text"> tasks:</span></div> </div> <div class=""> <div><span class="enlighter-text"> - debug:</span></div> </div> <div class=""> <div><span class="enlighter-text"> msg: </span><span class="enlighter-s0">"{{item}}"</span></div> </div> <div class=""> <div><span class="enlighter-text"> with_sequence: count=</span><span class="enlighter-n1">5</span></div> </div> </div> </div> 上例中count=5表示数字序列默认从1开始,到5结束,默认步长为1,与上述两种写法的效果相同。 当我们不指定stride的值时,stride的值默认为1,但是,当end的值小于start的值时,则必须指定stride的值,而且stride的值必须是负数,示例如下: <div class="enlighter-default enlighter-v-standard enlighter-t-enlighter enlighter-hover enlighter-overflow-scroll"> <div class="enlighter-toolbar"> <div class="enlighter-btn enlighter-btn-raw"></div> <div class="enlighter-btn enlighter-btn-copy"></div> <div class="enlighter-btn enlighter-btn-window"></div> </div> <div class="enlighter"> <div class=""> <div><span class="enlighter-text">---</span></div> </div> <div class=""> <div><span class="enlighter-text">- hosts: test70</span></div> </div> <div class=""> <div><span class="enlighter-text"> remote_user: root</span></div> </div> <div class=""> <div><span class="enlighter-text"> gather_facts: no</span></div> </div> <div class=""> <div><span class="enlighter-text"> tasks:</span></div> </div> <div class=""> <div><span class="enlighter-text"> - debug:</span></div> </div> <div class=""> <div><span class="enlighter-text"> msg: </span><span class="enlighter-s0">"{{item}}"</span></div> </div> <div class=""> <div><span class="enlighter-text"> with_sequence: start=</span><span class="enlighter-n1">6</span> <span class="enlighter-k1">end</span><span class="enlighter-text">=</span><span class="enlighter-n1">2</span><span class="enlighter-text"> stride=</span><span class="enlighter-n1">-2</span></div> </div> </div> </div> 上例中start的值为6,end的值为2,stride的值为-2,表示从6开始,每次减2,到2结束,上例playbook的执行结果如下: <div class="enlighter-default enlighter-v-standard enlighter-t-enlighter enlighter-hover enlighter-overflow-scroll"> <div class="enlighter-toolbar"> <div class="enlighter-btn enlighter-btn-raw"></div> <div class="enlighter-btn enlighter-btn-copy"></div> <div class="enlighter-btn enlighter-btn-window"></div> </div> <div class="enlighter"> <div class=""> <div><span class="enlighter-text">TASK </span><span class="enlighter-g1">[</span><span class="enlighter-text">debug</span><span class="enlighter-g1">]</span> <span class="enlighter-g0">***************************</span></div> </div> <div class=""> <div><span class="enlighter-text">ok: </span><span class="enlighter-g1">[</span><span class="enlighter-text">test70</span><span class="enlighter-g1">]</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">(</span><span class="enlighter-text">item=</span><span class="enlighter-n1">6</span><span class="enlighter-g1">)</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">{</span></div> </div> <div class=""> <div><span class="enlighter-s0">"changed"</span><span class="enlighter-text">: </span><span class="enlighter-k1">false</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"item"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"6"</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"msg"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"6"</span></div> </div> <div class=""> <div><span class="enlighter-g1">}</span></div> </div> <div class=""> <div><span class="enlighter-text">ok: </span><span class="enlighter-g1">[</span><span class="enlighter-text">test70</span><span class="enlighter-g1">]</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">(</span><span class="enlighter-text">item=</span><span class="enlighter-n1">4</span><span class="enlighter-g1">)</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">{</span></div> </div> <div class=""> <div><span class="enlighter-s0">"changed"</span><span class="enlighter-text">: </span><span class="enlighter-k1">false</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"item"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"4"</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"msg"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"4"</span></div> </div> <div class=""> <div><span class="enlighter-g1">}</span></div> </div> <div class=""> <div><span class="enlighter-text">ok: </span><span class="enlighter-g1">[</span><span class="enlighter-text">test70</span><span class="enlighter-g1">]</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">(</span><span class="enlighter-text">item=</span><span class="enlighter-n1">2</span><span class="enlighter-g1">)</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">{</span></div> </div> <div class=""> <div><span class="enlighter-s0">"changed"</span><span class="enlighter-text">: </span><span class="enlighter-k1">false</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"item"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"2"</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"msg"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"2"</span></div> </div> <div class=""> <div><span class="enlighter-g1">}</span></div> </div> </div> </div> 看完上述总结,你肯定已经明白了”with_sequence”循环的用法,所以,我们可以使用”with_sequence”完成上述创建目录的需求,示例playbook如下: <div class="enlighter-default enlighter-v-standard enlighter-t-enlighter enlighter-hover enlighter-overflow-scroll"> <div class="enlighter-toolbar"> <div class="enlighter-btn enlighter-btn-raw"></div> <div class="enlighter-btn enlighter-btn-copy"></div> <div class="enlighter-btn enlighter-btn-window"></div> </div> <div class="enlighter"> <div class=""> <div><span class="enlighter-text">---</span></div> </div> <div class=""> <div><span class="enlighter-text">- hosts: test70</span></div> </div> <div class=""> <div><span class="enlighter-text"> remote_user: root</span></div> </div> <div class=""> <div><span class="enlighter-text"> gather_facts: no</span></div> </div> <div class=""> <div><span class="enlighter-text"> tasks:</span></div> </div> <div class=""> <div><span class="enlighter-text"> - file:</span></div> </div> <div class=""> <div><span class="enlighter-text"> path: </span><span class="enlighter-s0">"/testdir/testdir/test{{ item }}"</span></div> </div> <div class=""> <div><span class="enlighter-text"> state: directory</span></div> </div> <div class=""> <div><span class="enlighter-text"> with_sequence:</span></div> </div> <div class=""> <div><span class="enlighter-text"> start=</span><span class="enlighter-n1">2</span></div> </div> <div class=""> <div><span class="enlighter-k1">end</span><span class="enlighter-text">=</span><span class="enlighter-n1">10</span></div> </div> <div class=""> <div><span class="enlighter-text"> stride=</span><span class="enlighter-n1">2</span></div> </div> </div> </div> “with_sequence”还有一个小功能,就是”格式化”输出数据的功能,”格式化数据”的方法与C语言的printf函数的使用方法类似,如果你不了解printf函数,可以参考博客中的文章:<a href="https://www.zsythink.net/archives/1411" target="_blank" rel="noopener">printf命令总结</a>,这篇文章介绍了linux下printf命令的用法,虽然C语言的printf与linux的printf命令的使用方法并不完全相同,但是大致类似,还是能够对理解”with_sequence”的格式化功能有所帮助的,此处假设你已经阅读了对应的文章或者已经理解了printf的使用方法,那么我们来看一个格式化数据的小示例,playbook如下: <div class="enlighter-default enlighter-v-standard enlighter-t-enlighter enlighter-hover enlighter-overflow-scroll"> <div class="enlighter-toolbar"> <div class="enlighter-btn enlighter-btn-raw"></div> <div class="enlighter-btn enlighter-btn-copy"></div> <div class="enlighter-btn enlighter-btn-window"></div> </div> <div class="enlighter"> <div class=""> <div><span class="enlighter-text">---</span></div> </div> <div class=""> <div><span class="enlighter-text">- hosts: test70</span></div> </div> <div class=""> <div><span class="enlighter-text"> remote_user: root</span></div> </div> <div class=""> <div><span class="enlighter-text"> gather_facts: no</span></div> </div> <div class=""> <div><span class="enlighter-text"> tasks:</span></div> </div> <div class=""> <div><span class="enlighter-text"> - debug:</span></div> </div> <div class=""> <div><span class="enlighter-text"> msg: </span><span class="enlighter-s0">"{{item}}"</span></div> </div> <div class=""> <div><span class="enlighter-text"> with_sequence: start=</span><span class="enlighter-n1">2</span> <span class="enlighter-k1">end</span><span class="enlighter-text">=</span><span class="enlighter-n1">6</span><span class="enlighter-text"> stride=</span><span class="enlighter-n1">2</span><span class="enlighter-text"> format=</span><span class="enlighter-s0">"number is %0.2f"</span></div> </div> </div> </div> 如上例所示,使用”format”可以指定数据输出的格式,上例中我指定的数据格式为”number is %0.2f”,其中,”number is “是我指定的固定字符串,” %0.2f”表示将数字格式化为一个保留两位小数点的浮点数,那么上例的playbook执行后debug模块输出信息如下: <div class="enlighter-default enlighter-v-standard enlighter-t-enlighter enlighter-hover enlighter-overflow-scroll"> <div class="enlighter-toolbar"> <div class="enlighter-btn enlighter-btn-raw"></div> <div class="enlighter-btn enlighter-btn-copy"></div> <div class="enlighter-btn enlighter-btn-window"></div> </div> <div class="enlighter"> <div class=""> <div><span class="enlighter-text">TASK </span><span class="enlighter-g1">[</span><span class="enlighter-text">debug</span><span class="enlighter-g1">]</span> <span class="enlighter-g0">***************************</span></div> </div> <div class=""> <div><span class="enlighter-text">ok: </span><span class="enlighter-g1">[</span><span class="enlighter-text">test70</span><span class="enlighter-g1">]</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">(</span><span class="enlighter-text">item=number is </span><span class="enlighter-n0">2.00</span><span class="enlighter-g1">)</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">{</span></div> </div> <div class=""> <div><span class="enlighter-s0">"changed"</span><span class="enlighter-text">: </span><span class="enlighter-k1">false</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"item"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"number is 2.00"</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"msg"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"number is 2.00"</span></div> </div> <div class=""> <div><span class="enlighter-g1">}</span></div> </div> <div class=""> <div><span class="enlighter-text">ok: </span><span class="enlighter-g1">[</span><span class="enlighter-text">test70</span><span class="enlighter-g1">]</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">(</span><span class="enlighter-text">item=number is </span><span class="enlighter-n0">4.00</span><span class="enlighter-g1">)</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">{</span></div> </div> <div class=""> <div><span class="enlighter-s0">"changed"</span><span class="enlighter-text">: </span><span class="enlighter-k1">false</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"item"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"number is 4.00"</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"msg"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"number is 4.00"</span></div> </div> <div class=""> <div><span class="enlighter-g1">}</span></div> </div> <div class=""> <div><span class="enlighter-text">ok: </span><span class="enlighter-g1">[</span><span class="enlighter-text">test70</span><span class="enlighter-g1">]</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">(</span><span class="enlighter-text">item=number is </span><span class="enlighter-n0">6.00</span><span class="enlighter-g1">)</span><span class="enlighter-text"> =</span><span class="enlighter-g1">></span> <span class="enlighter-g1">{</span></div> </div> <div class=""> <div><span class="enlighter-s0">"changed"</span><span class="enlighter-text">: </span><span class="enlighter-k1">false</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"item"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"number is 6.00"</span><span class="enlighter-text">,</span></div> </div> <div class=""> <div><span class="enlighter-s0">"msg"</span><span class="enlighter-text">: </span><span class="enlighter-s0">"number is 6.00"</span></div> </div> <div class=""> <div><span class="enlighter-g1">}</span></div> </div> </div> </div> 从输出结果可以看出,最终的信息格式与我们所指定的格式完全一致。 “with_sequence”说完了,再来了解一个新的关键字,它就是”with_random_choice” “with_random_choice”的用法非常简单,使用”with_random_choice”可以从列表的多个值中随机返回一个值,先来看一个小示例,playbook如下: <div class="enlighter-default enlighter-v-standard enlighter-t-enlighter enlighter-hover enlighter-overflow-scroll"> <div class="enlighter-toolbar"> <div class="enlighter-btn enlighter-btn-raw"></div> <div class="enlighter-btn enlighter-btn-copy"></div> <div class="enlighter-btn enlighter-btn-window"></div> </div> <div class="enlighter"> <div class=""> <div><span class="enlighter-text">---</span></div> </div> <div class=""> <div><span class="enlighter-text">- hosts: test70</span></div> </div> <div class=""> <div><span class="enlighter-text"> remote_user: root</span></div> </div> <div class=""> <div><span class="enlighter-text"> gather_facts: no</span></div> </div> <div class=""> <div><span class="enlighter-text"> tasks:</span></div> </div> <div class=""> <div><span class="enlighter-text"> - debug:</span></div> </div> <div class=""> <div><span class="enlighter-text"> msg: </span><span class="enlighter-s0">"{{item}}"</span></div> </div> <div class=""> <div><span class="enlighter-text"> with_random_choice:</span></div> </div> <div class=""> <div><span class="enlighter-text"> - </span><span class="enlighter-n1">1</span></div> </div> <div class=""> <div><span class="enlighter-text"> - </span><span class="enlighter-n1">2</span></div> </div> <div class=""> <div><span class="enlighter-text"> - </span><span class="enlighter-n1">3</span></div> </div> <div class=""> <div><span class="enlighter-text"> - </span><span class="enlighter-n1">4</span></div> </div> <div class=""> <div><span class="enlighter-text"> - </span><span class="enlighter-n1">5</span></div> </div> </div> </div> 如上例所示,我们定义了一个列表,列表中有5个值,我们使用”with_random_choice”处理这个列表。 连续执行上例playbook,可以看出每次返回的结果是从列表中随机选中的一个,具体返回结果我就不粘贴了,快动手试试吧~ 这篇文章就总结到这里,希望能够对你有所帮助。 转载自朱双印日志https://www.zsythink.net/archives/2790 Last modification:May 29, 2024 © Allow specification reprint Like 如果觉得我的文章对你有用,请随意赞赏