ansible-playbook配置思路：
1.通过vars中的main.yml配置变量，主要为源码存放目录及安装目录
2.通过tasks中的copy.yml将源码文件传输到异地服务器上源码存放目录
3.通过tasks中的install.yml调用模板mysql_install.sh，将mysql安装到变量中定义的安装目录
4.通过tasks中的main.yml调用copy模块和install模块
5.通过mysql.yml调用剧本(playbook)：mysql8https://www.cndba.cn/hbhe0316/article/4829https://www.cndba.cn/hbhe0316/article/4829

https://www.cndba.cn/hbhe0316/article/4829https://www.cndba.cn/hbhe0316/article/4829

https://www.cndba.cn/hbhe0316/article/4829

[root@master ansible]# cd /etc/ansible
[root@master ansible]# mkdir -p roles/mysql8/{files,handlers,meta,tasks,templates,vars}
[root@master ansible]# cd /etc/ansible
[root@master ansible]# cat mysql8.yml
- hosts: dbservers
remote_user: root
gather_facts: False
roles:
- mysql8
[root@master mysql8]# pwd
/etc/ansible/roles/mysql8
[root@master mysql8]# tree
.
├── files
│   └── mysql-8.0.20-linux-glibc2.12-x86_64.tar.xz
├── handlers
├── meta
├── tasks
│   ├── copy.yml
│   ├── install.yml
│   └── main.yml
├── templates
│   └── mysql8install.sh
└── vars
└── main.yml

说明：
files：存放需要同步到异地服务器的源码文件及配置文件；
handlers：当资源发生变化时需要进行的操作，若没有此目录可以不建或为空；
meta：角色定义可留空；
tasks：mysql安装过程成需要进行的执行的任务；
templates：用于执行mysql安装的模板文件，一般为脚本；
vars：本次安装定义的变量

[root@master mysql_install]# cat tasks/copy.yml
- name: copy mysql source code to client
copy: src={{mysql_version}}.tar.gz dest=/root/{{mysql_version}}.tar.gz owner=root group=root
- name: copy mysql install script to client
template: src=mysql8install.sh dest=/root/mysql8install.sh owner=root group=root mode=0755
[root@master mysql_install]# cat tasks/install.yml
- name: install mysql
shell: /bin/sh /root/mysql8install.sh
[root@master mysql_install]# cat tasks/main.yml
- include: copy.yml
- include: install.yml

[root@master mysql8]# cd /etc/ansible/roles/mysql8
[root@master mysql8]# cat templates/mysql8install.sh
#!/bin/bash
start_time=$(date +%s)
#yum -y install gcc gcc-c++ openssl openssl-devel libaio libaio-devel  ncurses  ncurses-devel  >> /dev/null
tar xvf /root/mysql-8.0.20-linux-glibc2.12-x86_64.tar.xz  -C / >> /dev/null
mv  /mysql-8.0.20-linux-glibc2.12-x86_64  /mysql
# 创建数据库文件目录和创建日志目录
mkdir  /mysql/{data,log}
#创建mysql组和用户
groupadd mysql
useradd -r -g mysql -s /bin/false mysql
chown  -R  mysql:mysql /mysql
#配置/etc/my.cnf
cat > /etc/my.cnf <<EOF
[mysqld]
port=3306
datadir=/mysql/data
log-error=/mysql/log/mysql-err.log
user=mysql
[client]
socket=/tmp/mysql.sock
EOF
#配置环境变量
echo "export PATH=$PATH:/mysql/bin"  >>  /etc/profile
source /etc/profile
#初始化数据库
/mysql/bin/mysqld  --initialize  --user=mysql  --basedir=/mysql　--datadir=/mysql/data   >>  /dev/null
#制作启动文件
cp  /mysql/support-files/mysql.server  /etc/init.d/mysqld
sed  -i  's/^basedir=/basedir=//mysql/'  /etc/init.d/mysqld
sed  -i  's/^datadir=/datadir=//mysql//data/'  /etc/init.d/mysqld
chmod  755 /etc/init.d/mysqld
#启动mysql服务
/etc/init.d/mysqld start
#关闭mysql服务　
#/etc/init.d/mysqld stop
echo "#####mysql8安装完成#####"
#修改mysql登录密码
b=`grep  'temporary password' /mysql/log/mysql-err.log`
a=`echo ${b##*localhost:}`
echo $a
#创建/mysql/bin/mysql软连接，便于命令行直接执行mysql
ln  -s  /mysql/bin/mysql   /usr/bin/mysql
#mysql -e　可以直接在命令行执行命令,wwwwww是设定的新密码
mysql -uroot -p"${a}" -e  "ALTER USER 'root'@'localhost'  IDENTIFIED  BY 'wwwwww'"  --connect-expired-password
echo  "#####mysql8密码修改成功#####"
end_time=$(date +%s)
cost_time=$((end_time - start_time))

使用ansible安装
[root@master ansible]# cd /etc/ansible
[root@master ansible]# ansible-playbook /etc/ansible/mysql8.yml

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