ansible 安装 nginx
思路：先在一台机器上编译安装好nginx、打包，然后再用ansible去下发。
[root@server ~]# cd /etc/ansible
[root@server ansible]# mkdir nginx_install
[root@server ansible]# cd !$
cd nginx_install
[root@server nginx_install]# mkdir -p roles/{common,install}/{handlers,files,meta,tasks,templates,vars}
说明：roles目录下有两个角色，common为一些准备操作，install为安装nginx的操作。每隔角色下面又有几个目录，handlers下面是当发生改变时要执行的操作，通常用在配置文件发生改变，重启服务时。files为安装时用到的一些文件，meta为说明信息，说明角色依赖等信息，tasks里面是核心的配置文件，templates通常存一些配置文件，启动脚本等模版文件，vars下为定义的变量。
现server端已有编译安装好的nginx，配置好启动脚本，配置好配置文件，以它来做实验，client端要安好库文件 yum install -y gcc pcre-devel zlib-devel
打包nginx，并放在roles/install/files/下面。
[root@server ~]# cd /usr/local
[root@server local]# ls
bin etc games include lib lib64 libexec nginx sbin share src
[root@server local]# tar czvf nginx.tar.gz nginx
[root@server local]# ls
bin games lib libexec nginx.tar.gz share
etc include lib64 nginx sbin src
[root@server local]# cp nginx.tar.gz /etc/ansible/nginx_install/roles/install/files/
[root@server local]# ls !$
ls /etc/ansible/nginx_install/roles/install/files/
nginx.tar.gz
启动脚本、配置文件要放到 roles/install/templates 下面
[root@server ~]# cp /etc/init.d/nginx /etc/ansible/nginx_install/roles/install/templates/ ;cp /usr/local/nginx/conf/nginx.conf /etc/ansible/nginx_install/roles/install/templates/
[root@server ~]# ls !$
ls /etc/ansible/nginx_install/roles/install/templates/
nginx nginx.conf
定义common的tasks，nginx是需要一些依赖包的
[root@server ansible]# cd /etc/ansible/nginx_install/roles/
[root@server roles]# vim ./common/tasks/main.yml
- name: Install initializtion require software
yum: name={{ item }} state=installed
with_items:
-zlib-devel
-pcre-devel
-openssl-devel
定义变量
[root@server roles]# vim ./install/vars/main.yml
nginx_user: www
nginx_basedir: /usr/local/nginx
定义copy文件用于拷贝所有用到的文档到目标机器
[root@server roles]# vim ./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 m
ode=0644
定义install文件
[root@server roles]# vim ./install/tasks/install.yml
- name: Create Nginx User
user: name={{ nginx_user }} state=present createhome=no shell=/sbin/nologin
- name: Start Nginx Service
service: name=nginx state=started
- name: Add Boot Start Nginx Service
shell: chkconfig --level 345 nginx on
- name: Delete Nginx compression files
shell: rm -rf /tmp/nginx.tar.gz
定义tasks目录下的入口文件
[root@server roles]# vim ./install/tasks/main.yml
- include: copy.yml
- include: install.yml
到此两个roles：common和install就定义完成了，接下来定义一个总入口配置文件。
[root@server ansible]# vim /etc/ansible/nginx_install/install.yml
---
- hosts: client.test.com
remote_user: root
gather_facts: True
roles:
- common
- install
执行：
[root@server nginx_install]# ansible-playbook install.yml
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