我尝试为我的流浪汉机器编写playbook.yml,我遇到了以下问题。 Ansible提示我设置这些变量,我将这些变量设置为null / false / no / [just enter],但无论如何都要执行角色!我该如何防止这种行为?如果没有设置任何变量,我只想要没有动作。
---
- name: Deploy Webserver
hosts: webservers
vars_prompt:
run_common: "Run common tasks?"
run_wordpress: "Run Wordpress tasks?"
run_yii: "Run Yii tasks?"
run_mariadb: "Run MariaDB tasks?"
run_nginx: "Run Nginx tasks?"
run_php5: "Run PHP5 tasks?"
roles:
- { role: common, when: run_common is defined }
- { role: mariadb, when: run_mariadb is defined }
- { role: wordpress, when: run_wordpress is defined }
- { role: yii, when: run_yii is defined }
- { role: nginx, when: run_nginx is defined }
- { role: php5, when: run_php5 is defined }
答案 0 :(得分:24)
我相信在使用vars_prompt时将始终定义变量,因此“已定义”将始终为true。您可能想要的是这些内容:
- name: Deploy Webserver
hosts: webservers
vars_prompt:
- name: run_common
prompt: "Product release version"
default: "Y"
roles:
- { role: common, when: run_common == "Y" }
编辑:要回答你的问题,不,它不会引发错误。我制作了一个略有不同的版本并使用ansible 1.4.4进行了测试:
- name: Deploy Webserver
hosts: localohst
vars_prompt:
- name: run_common
prompt: "Product release version"
default: "N"
roles:
- { role: common, when: run_common == "Y" or run_common == "y" }
而角色/ common / tasks / main.yml包含:
- local_action: debug msg="Debug Message"
如果您运行上面的示例并按Enter键,接受默认值,则跳过该角色:
Product release version [N]:
PLAY [Deploy Webserver] *******************************************************
GATHERING FACTS ***************************************************************
ok: [localhost]
TASK: [common | debug msg="Debug Message"] ************************************
skipping: [localhost]
PLAY RECAP ********************************************************************
localhost : ok=1 changed=0 unreachable=0 failed=0
但是如果你运行它并在提示时输入Y或y,那么角色将根据需要执行:
Product release version [N]:y
PLAY [Deploy Webserver] *******************************************************
GATHERING FACTS ***************************************************************
ok: [localhost]
TASK: [common | debug msg="Debug Message"] ************************************
ok: [localhost] => {
"item": "",
"msg": "Debug Message"
}
PLAY RECAP ********************************************************************
localhost : ok=2 changed=0 unreachable=0 failed=0