安装ansible

1.安装ansible
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
yum install ansible -y



2.管理被控端，管理机先生成秘钥，然后推送公钥
[root@demo ~]# ssh-keygen
[root@demo ~]# for i in {11..12};do ssh-copy-id -i ~/.ssh/id_rsa.pub root@10.0.0.$i;done

3.配置被管理的主机清单
[root@demo ~]# cat /etc/ansible/hosts
[web]
10.0.0.11
10.0.0.12

4.使用ansible的ad-hoc测试
[root@demo ~]# ansible all -m ping
10.0.0.12 | SUCCESS => {
"changed": false,
"ping": "pong"
}
10.0.0.11 | SUCCESS => {
"changed": false,
"ping": "pong"
}

#执行远程命令
[root@demo ~]# ansible all -m shell -a "df -h"
10.0.0.12 | CHANGED | rc=0 >>
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 98G 3.4G 95G 4% /
devtmpfs 477M 0 477M 0% /dev
tmpfs 488M 0 488M 0% /dev/shm
tmpfs 488M 7.7M 480M 2% /run
tmpfs 488M 0 488M 0% /sys/fs/cgroup
/dev/sda1 197M 102M 96M 52% /boot
tmpfs 98M 0 98M 0% /run/user/0

10.0.0.11 | CHANGED | rc=0 >>
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 98G 1.6G 97G 2% /
devtmpfs 981M 0 981M 0% /dev
tmpfs 992M 124K 992M 1% /dev/shm
tmpfs 992M 9.6M 982M 1% /run
tmpfs 992M 0 992M 0% /sys/fs/cgroup
/dev/sda1 197M 102M 96M 52% /boot
tmpfs 199M 0 199M 0% /run/user/0

5.ansible playbook自动化安装nginx
[root@demo ~]# cat playbook_nginx.yml
- hosts: web
remote_user: root
vars:
http_port: 80
tasks:
- name: Add Nginx Yum Repository
yum_repository:
name: nginx
description: Nginx Repository
baseurl: http://nginx.org/packages/centos/7/$basearch/
gpgcheck: no

- name: Install Nginx Server
yum: name=nginx state=present

- name: Configure Nginx Server
template: src=./default.conf.template dest=/etc/nginx/conf.d/default.conf
notify: Restart Nginx Server

- name: Start Nginx Server
service: name=nginx state=started enabled=yes

handlers:
- name: Restart Nginx Server
service: name=nginx state=restarted


6.default.conf.template文件如下
[root@demo ~]# cat default.conf.template
server {
listen {{ http_port }};
server_name localhost;

location / {
root /usr/share/nginx/html;
index index.html index.htm;
}
}

7.执行ansible-playbook
检查语法
[root@demo ~]# ansible-playbook --syntax playbook_nginx.yml

模拟执行
[root@demo ~]# ansible-playbook -C playbook_nginx.yml

执行
[root@demo ~]# ansible-playbook playbook_nginx.yml