Install the Ansible automation tool:
Check Python version
python -V
Check if there is ansible rpm package in the yum repository
yum list |grep ansible
Install ansible service
yum install -y ansible
Modify ansible configuration and host list hosts
1) Close the command prompt when using ansible to connect to the client for the first time:
sed -i "s@\#host_key_checking = False@host_key_checking = False@g" /etc/ansible/ansible.cfg
Specify the log path:
sed -i "s@\#log_path = \/var\/log\/ansible.log@log_path = \/var\/log\/ansible.log@g" /etc/ansible/ansible.cfg
2) Add all host IPs to the /etc/ansible/hosts file:
define host groups and hosts
cat >/etc/ansible/hosts<<EOF
[app]
192.168.137.132
192.168.137.133
EOF
Replenish:
默认ssh的端口为22端口，如果为其他端口号，可在主机名后面加上端口号；
如:192.168.159.131:9604 ，也可以修改配置文件中的remote_port变量值；
/etc/ansible/hosts也可以定义一个主机范围，如192.168.159.[100:200] ，表示192.168.159.100 - 192.168.159.200 的主机。
Create and configure SSH public key authentication (password-free login):
Follow the prompts to use the default configuration and press Enter all the way:
ssh-keygen -t rsa
Distribute the public key to each host through the ansible command:
ansible all -m authorized_key -a "user=root key='{
{ lookup('file', '/root/.ssh/id_rsa.pub') }}' path=/root/.ssh/authorized_keys manage_dir=no" --ask-pass -c paramiko
Log in to 192.168.137.133 to view: 
Modify the ansible configuration and specify the private key file path:
sed -i "s@\#private_key_file = \/path\/to\/file@private_key_file = \/root\/.ssh\/id_rsa@g" /etc/ansible/ansible.cfg
ping command test:
ansible all -m ping
Use ansible-playbook to install mysql in batches:
cd /etc/ansible #进入目录
mkdir deploy-yml #创建目录
cat >/etc/ansible/deploy-yml/mysql.yml<<EOF #创建 mysql.yml 文件
- hosts: mysql-test
remote_user: root
gather_facts: False
roles:
- mysql
EOF
Enter roles to create the mysql directory, and create the following directories and files:
The directories that are not used temporarily are empty: templates, files, handlers, meta
Create a directory structure under /etc/ansible/roles/mysql/
mkdir files handlers meta tasks templates vars
Create copy.yml under tasks
cat >tasks/copy.yml<<EOF
#复制源码至目标服务器
- name: copy mysql source code to client
copy: src={
{
mysql_package}} dest={
{
install_dir}} owner=root group=root
#复制模板文件至目标服务器
- name: copy mysql install script to client
template: src={
{
shell_dir}} dest={
{
install_dir}} owner=root group=root mode=0775
EOF
Create install.yml under tasks
cat >tasks/install.yml<<EOF
#执行模板文件进行安装
- name: install mysql
shell: bash {
{
install_dir}}/{
{
shell_name}}
EOF
Create main.yml under tasks
cat >tasks/main.yml<<EOF
#引用copy、install模块
- include: copy.yml
- include: install.yml
EOF
Create main.yml under vars
cat >vars/main.yml<<EOF
mysql_version: mysql-5.7.12
#这里事先下好了包 放在指定路径下即可
mysql_package: /usr/local/mysql-5.7.12-linux-glibc2.5-x86_64.tar.gz
shell_name : insmysql.sh
install_dir: /usr/local
shell_dir: /install/insmysql.sh
EOF
Create a mysql-test group in /etc/ansible/hosts and add the ip that needs to install mysql
Only one machine is used here for testing, and the machines can be directly added under the mysql-test group in batches - - all machines must be SSH-free password-free login
cat >>/etc/ansible/hosts<<EOF
[mysql-test]
192.168.137.133
EOF
Test with ansible-playbook -C mysql.yml
After the test is ok, " ansible-playbook mysql.yml " executes