ansible最佳实战部署nginx

1、先看下整体目录架构

[root@bogon ~]# cd /etc/ansible/

[root@bogon ansible]# tree

.

├── ansible.cfg

├── group_vars

│   └── all

├── hosts

├── roles

│   └── webservs

│       ├── handlers

│       │   └── main.yml

│       ├── README.md

│       ├── tasks

│       │   ├── install_nginx.yaml

│       │   └── main.yaml

│       └── templates

│           ├── index.html.j2

│           └── nginx.conf.j2

├── site.retry

└── site.yaml

6 directories, 11 files

2、初始化一个role

[root@bogon ~]# ansible-galaxy init /etc/ansible/roles/websrvs

查看已经创建的role

[root@bogon ~]# ls /etc/ansible/roles/

webservs

把初始化后， role里面没用的目录删除，没有的目录就创建，按照第一步的目录架构来

3、配置ansible.cfg

[root@bogon ansible]# cat ansible.cfg

[defaults]

inventory = /etc/ansible/hosts

sudo_user=root

remote_port=22

host_key_checking=False

remote_user=root

log_path=/var/log/ansible.log

module_name=command

private_key_file=/root/.ssh/id_rsa

4、配置变量all文件，注意：名字只能写成all，写其他的就报错

[root@bogon group_vars]# cat all

---

# vars file for /etc/ansible/roles/webservs

worker_processes: 4

worker_connections: 768

max_open_files: 65506

5、配置site.yaml作为执行入口文件，里面定义都对哪些roles操作

[root@bogon ansible]# cat site.yaml

---

# this playbook deploy the whole application stack in this site

- name: configuration and deploy webservers and application code

  hosts: webservers

  roles:

    - webservs

6、配置handlers文件 ，就是触发器，比如满足条件后启动nginx

[root@bogon webservs]# cat handlers/main.yml

---

# handlers file for /etc/ansible/roles/webservs

- name: restart nginx

  service: name=nginx state=restarted

7、配置tasks， 这是具体执行操作的yaml文件

[root@bogon webservs]# cat tasks/main.yaml

---

- include: install_nginx.yaml

[root@bogon webservs]# cat tasks/install_nginx.yaml

---

# tasks file for /etc/ansible/roles/webservs

- name: install nginx

  command: yum install nginx -y

- name: copy nginx config file

  template: src=nginx.conf.j2 dest=/etc/nginx/nginx.conf

  notify: restart nginx

- name: copy index.html

  template:

    src: index.html.j2

    dest: /usr/share/nginx/www/index.html

    mode: 0644

  notify: restart nginx

- name: see file

  command: ls /root

  notify: restart nginx

8、配置templates。  就是准备需要的模板文件，没有就不用准备

[root@bogon webservs]# cat templates/nginx.conf.j2

worker_processes {{ worker_processes }};

worker_rlimit_nofile {{ max_open_files }};

events {

    worker_connections {{ worker_connections }};

}

http {

    server {

        listen       80;

        root  /usr/share/nginx/www;

        index index.html index.htm default.html index.php;

        server_name loclhost;

        location / {

            try_files  / =404;

        }

    }

}

[root@bogon webservs]# cat templates/index.html.j2

<html>

  <head>

    <title>welcome to american</title>

  </head>

  <body>

  <h1>nginx, confitured by ansible</h1>

  <p>if you can see this, ansible successfully installed nginx.</p>

  <p>{{ ansible_hostname }}</p>

  </body>

</html>

9、执行部署

[root@bogon ansible]# ls

ansible.cfg  group_vars  hosts  roles  site.retry  site.yaml

[root@bogon ansible]# ansible-playbook site.yaml
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ansible最佳实战部署nginx

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