Ansible 使用 Playbook 安装 Nginx

思路：先在一台机器上编译安装好 Nginx，打包，然后通过 Ansible 下发

[root@localhost ~]$ cd /etc/ansible/
[root@localhost ansible]$ mkdir nginx_install
[root@localhost ansible]$ cd nginx_install/
[root@localhost nginx_install]$ mkdir -p roles/{common,install}/{handlers,files,meta,tasks,templates,vars}

[root@localhost nginx_install]$ tree ./
./
└── roles                # 定义角色目录，common为一些准备操作，install为安装nginx的操作    
    ├── common
    │   ├── files        # 存放安装包的目录
    │   ├── handlers     # 存放当发生变更是要执行的操作，如修改配置文件、重启服务等
    │   ├── meta         # 存放说明信息，如说明角色依赖等信息
    │   ├── tasks        # 存放核心的任务配置文件
    │   ├── templates    # 存放配置文件、启动文件等模板文件
    │   └── vars         # 用来定义变量的目录
    └── install
        ├── files
        ├── handlers
        ├── meta
        ├── tasks
        ├── templates
        └── vars

编译安装 Nginx ：

[root@localhost ~]$ cd /usr/local/src/
[root@localhost ~]$ yum install -y pcre-devel zlib-devel gcc gcc-c++
[root@localhost src]$ wget http://nginx.org/download/nginx-1.12.2.tar.gz
[root@localhost src]$ tar xf nginx-1.12.2.tar.gz 
[root@localhost src]$ cd nginx-1.12.2/
[root@localhost nginx-1.12.2]$ ./configure --prefix=/usr/local/nginx
[root@localhost nginx-1.12.2]$ make && make install
[root@localhost nginx-1.12.2]$ vim /etc/init.d/nginx          # https://coding.net/u/aminglinux/p/aminglinux-book/git/blob/master/D15Z/etc_init.d_nginx
[root@localhost nginx-1.12.2]$ chmod 755 /etc/init.d/nginx
[root@localhost nginx-1.12.2]$ chkconfig --add nginx
[root@localhost nginx-1.12.2]$ chkconfig nginx on
[root@localhost nginx-1.12.2]$ cd /usr/local/nginx/conf/
[root@localhost conf]$ mv nginx.conf nginx.conf.bak
[root@localhost conf]$ vim nginx.conf                         # https://coding.net/u/aminglinux/p/aminglinux-book/git/blob/master/D15Z/nginx.conf
[root@localhost conf]$ /usr/local/nginx/sbin/nginx -t
[root@localhost conf]$ /etc/init.d/nginx start
[root@localhost conf]$ netstat -tunlp | grep 80

打包：

[root@localhost ~]$ cd /etc/ansible/nginx_install/roles/install/files/
[root@localhost files]$ tar czf nginx.tar.gz --exclude "nginx.conf" --exclude "vhost" /usr/local/nginx

拷贝配置文件和启动文件到模板目录：

[root@localhost ~]$ cp /usr/local/nginx/conf/nginx.conf /etc/ansible/nginx_install/roles/install/templates/
[root@localhost ~]$ cp /etc/init.d/nginx /etc/ansible/nginx_install/roles/install/templates/

安装一些依赖包：

[root@localhost ~]$ cd /etc/ansible/nginx_install/roles/
[root@localhost roles]$ cat common/tasks/main.yml
- name: Install initializtion require software
  yum: name={{ item }} state=installed
  with_items:
    - zlib-devel
    - pcre-devel

定义一些变量：

[root@localhost roles]$ cat install/vars/main.yml 
nginx_user: www
nginx_port: 80
nginx_basedir: /usr/local/nginx

把用到的文档拷贝到目标机器：

[root@localhost roles]$ cat install/tasks/copy.yml 
- name: Copy Nginx Software
  copy: src=nginx.tar.gz dest=/tmp/nginx.tar.gz owner=root group=root

- name: Uncompression Nginx Software
  shell: tar zxf /tmp/nginx.tar.gz -C /usr/local/

- name: Copy Nginx Start Script
  template: src=nginx dest=/etc/init.d/nginx owner=root group=root mode=0755

- name: Copy Nginx Config
  template: src=nginx.conf dest={{ nginx_basedir }}/conf/ owner=root group=root mode=0644

创建用户 ，启动服务 ，删除压缩包：

[root@localhost roles]$ cat install/tasks/install.yml
- name: Create Nginx User
  user: name={{ nginx_user }} state=present createhome=no shell=/sbin/nologin

- name: Start Nginx Service
  shell: /etc/init.d/nginx start

- name: Add Boot Start Nginx Service
  shell: chkconfig --level 345 nginx on

- name: Delete Nginx compression files
  shell: rm -rf /tmp/nginx.tar.gz

创建 main.yml ，去调用 copy.yml 和 install.yml：

[root@localhost roles]$ cat install/tasks/main.yml
- include: copy.yml
- include: install.yml

最后，创建总入口文件：

[root@localhost ~]$ cat /etc/ansible/nginx_install/install.yml
---
- hosts: 192.168.119.134
  remote_user: root
  gather_facts: True
  roles:
    - common
    - install

执行 yaml 安装 Nginx：

[root@localhost ~]$ ansible-playbook /etc/ansible/nginx_install/install.yml