欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

mysql mha

程序员文章站 2022-07-07 22:00:29
1.rpm安装mysql5.7 2.启动mysql,更改root密码 3.主从配置 查看master状态 在slave上设置master 查看slave状态 4.配置3个节点ssh互信 最后测试三个节点之间可以无密码登录 5.安装MHA 安装依赖包 在3个节点安装MHA的node 在slave/MH ......

1.rpm安装mysql5.7

yum remove mariadb* -y
rpm -ivh mysql-community-common-5.7.25-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-5.7.25-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-5.7.25-1.el7.x86_64.rpm
rpm -ivh mysql-community-server-5.7.25-1.el7.x86_64.rpm

2.启动mysql,更改root密码

systemctl start mysqld
grep "temporary password" /var/log/mysqld.log
mysqladmin -uroot -p password

3.主从配置

修改mysql配置文件/etc/my.cnf,添加以下内容
[client]
user=root
password=jpcms123!
[mysqld]
server-id=1
read-only=1
log-bin=mysql-bin
relay-log=mysql-relay-bin
replicate-wild-ignore-table=mysql.%
replicate-wild-ignore-table=test.%
replicate-wild-ignore-table=information_schema.%
创建同步账户
mysql>grant replication slave on *.* to 'repl_user'@'192.168.1.%' identified by 'repl_passwd123!';
mysql>grant all on *.* to 'root'@'192.168.1.%' identified by 'jpcms123456!';    #很重要

查看master状态

mysql mha

在slave上设置master

change master to master_host='192.168.1.111',master_user='repl_user',master_password='repl_passwd123!',master_log_file='mysql-bin.000001',master_log_pos=742;

查看slave状态

start slave;
show slave status\g;

mysql mha

4.配置3个节点ssh互信

ssh-keygen -t rsa
ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.1.111
ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.1.112
ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.1.113

mysql mha

最后测试三个节点之间可以无密码登录

ssh 192.168.1.111 date
ssh 192.168.1.112 date
ssh 192.168.1.113 date

mysql mha

5.安装mha

 安装依赖包

rpm -ivh mysql-community-libs-compat-5.7.25-1.el7.x86_64.rpm
yum install epel-release -y
yum install perl-dbd-mysql perl-config-tiny perl-log-dispatch perl-parallel-forkmanager perl-config-inifiles perl-time-hires

在3个节点安装mha的node

rpm -ivh mha4mysql-node-0.58-0.el7.centos.noarch.rpm

在slave/mha manager节点上安装mha4mysql-manage

rpm -ivh mha4mysql-manager-0.58-0.el7.centos.noarch.rpm

6.配置mha

mkdir -p /etc/mha/scripts
vim /etc/masterha_default.cnf
[server default]
user=root
password=jpcms123456!
ssh_user=root
repl_user=repl_user
repl_password=repl_passwd123!
ping_interval=1
secondary_check_script=masterha_secondary_check -s 192.168.1.111 -s 192.168.1.112 -s 192.168.1.113 --user=repl_user --master_host=localhost.localdomain --master_ip=192.168.1.111 --master_port=3306
master_ip_failover_script="/etc/mha/scripts/master_ip_failover"
# master_ip_online_change_script="/etc/mha/scripts/master_ip_online_change"
# shutdown_script= /script/masterha/power_manager
report_script="/etc/mha/scripts/send_report"
vim /etc/mha/app1.cnf
脚本
#!/usr/bin/env perl
use strict;
use warnings fatal => 'all';
use getopt::long;
my (
 $command, $ssh_user, $orig_master_host, $orig_master_ip,
 $orig_master_port, $new_master_host, $new_master_ip, $new_master_port
);
my $vip = '192.168.1.115/24';
my $key = '1';
my $ssh_start_vip = "/sbin/ifconfig eth0:$key $vip";
my $ssh_stop_vip = "/sbin/ifconfig eth0:$key down";
getoptions(
 'command=s' => \$command,
 'ssh_user=s' => \$ssh_user,
 'orig_master_host=s' => \$orig_master_host,
 'orig_master_ip=s' => \$orig_master_ip,
 'orig_master_port=i' => \$orig_master_port,
 'new_master_host=s' => \$new_master_host,
 'new_master_ip=s' => \$new_master_ip,
 'new_master_port=i' => \$new_master_port,
);
exit &main();
sub main {
 print "\n\nin script test====$ssh_stop_vip==$ssh_start_vip===\n\n";
 if ( $command eq "stop" || $command eq "stopssh" ) {
 my $exit_code = 1;
 eval {
 print "disabling the vip on old master: $orig_master_host \n";
 &stop_vip();
 $exit_code = 0;
 };
 if ($@) {
 warn "got error: $@\n";
 exit $exit_code;
 }
 exit $exit_code;
 }
 elsif ( $command eq "start" ) {
 my $exit_code = 10;
 eval {
 print "enabling the vip - $vip on the new master - $new_master_host \n";
 &start_vip();
 $exit_code = 0;
 };
 if ($@) {
 warn $@;
 exit $exit_code;
 }
 exit $exit_code;
 }
 elsif ( $command eq "status" ) {
 print "checking the status of the script.. ok \n";
 exit 0;
 }
 else {
 &usage();
 exit 1;
 }
}
sub start_vip() {
 `ssh $ssh_user\@$new_master_host \" $ssh_start_vip \"`;
}
sub stop_vip() {
 return 0 unless ($ssh_user);
 `ssh $ssh_user\@$orig_master_host \" $ssh_stop_vip \"`;
}
sub usage {
 print
 "usage: master_ip_failover --command=start|stop|stopssh|status --orig_master_host=host
--orig_master_ip=ip --orig_master_port=port --new_master_host=host --new_master_ip=ip
--new_master_port=port\n";
}

在master上添加vip

ifconfig eth0:1 192.168.1.115/24

 

测试mha

a.通过 masterha_check_ssh 验证 ssh 信任登录是否成功

masterha_check_ssh --conf=/etc/mha/app1.cnf

mysql mha

b.masterha_check_repl 验证 mysql 复制是否成功

masterha_check_repl --conf=/etc/mha/app1.cnf