wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo

curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

yum install ansible -y

hostnamectl set-hostname standby

vim /etc/sysconfig/network-scripts/ifcfg-eth0

IPADDR=10.0.0.200

UUID行删掉

vim /etc/hosts

10.0.0.200 standby

systemctl restart network

ssh-keygen

ssh-copy-id -i ~/.ssh/id_rsa.pub root@10.0.0.200

[root@demo ~]# for i in {1..12};do ssh-copy-id -i ~/.ssh/id_rsa.pub root@10.0.0.$i;done

[root@demo ~]# vim /etc/ansible/hosts

[web]

10.0.0.100

10.0.0.200

[root@demo ~]# ansible all -m ping

测试成功显示

------------------------------------------------------

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"

执行后结果

----------------------------------------------------------------------

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

----------------------------------------------------------------------

[root@demo ~]# vim  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

[root@demo ~]#vim default.conf.template 

server {

    listen       {{ http_port }};

    server_name  localhost;

    location / {

        root   /usr/share/nginx/html;

        index  index.html index.htm;

    }

}

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