我正在尝试编写一个 Ansible 剧本,仅在 Nginx 尚未存在且当前版本不存在时才编译 Nginx。然而它每次都会编译,这是不可取的。
这就是我所拥有的:
- shell: /usr/local/nginx/sbin/nginx -v 2>&1
register: nginxVersion
- debug:
var=nginxVersion
- name: install nginx
shell: /var/local/ansible/nginx/makenginx.sh
when: "not nginxVersion == 'nginx version: nginx/1.8.0'"
become: yes
除了每次运行 shell 脚本来编译 Nginx 之外,该脚本都可以正常工作。 nginxVersion 的调试输出为:
ok: [server] => {
"var": {
"nginxVersion": {
"changed": true,
"cmd": "/usr/local/nginx/sbin/nginx -v 2>&1",
"delta": "0:00:00.003752",
"end": "2015-09-25 16:45:26.500409",
"invocation": {
"module_args": "/usr/local/nginx/sbin/nginx -v 2>&1",
"module_name": "shell"
},
"rc": 0,
"start": "2015-09-25 16:45:26.496657",
"stderr": "",
"stdout": "nginx version: nginx/1.8.0",
"stdout_lines": [
"nginx version: nginx/1.8.0"
],
"warnings": []
}
}
}
根据我在正确路线上的文档,我错过了什么简单的技巧?