MHAvip漂移
配置
通过MHA自带脚本方式,管理虚拟IP的漂移
获取管理脚本master_ip_failover
cp master_ip_failover /usr/local/bin/ #脚本放在/usr/local/bin/下 记得给脚本X权限
脚本内容
#!/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 = '192.168.50.5/24'; #根据自己的配置修改IP my $key = '0'; #网卡后缀数值,如果是eth0就是0如果是eth1就是1 my $ssh_start_vip = "/sbin/ifconfig eth0:$key $vip"; #开启vip命令 my $ssh_stop_vip = "/sbin/ifconfig eth0:$key down"; #关闭vip命令 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 { if ( $command eq "stop" || $command eq "stopssh" ) { my $exit_code = 1; eval { print "Disabling the VIP on old master:$orig_master_host "; &stop_vip(); $exit_code = 0; }; if ($@) { warn "Got Error: $@ "; 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 "; &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 "; `ssh $ssh_user@$orig_master_host " $ssh_start_vip "`; exit 0; } else { &usage(); exit 1; } } sub start_vip() { `ssh $ssh_user@$new_master_host " $ssh_start_vip "`; } sub stop_vip() { `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 "; }
修改mha配置文件
vim /etc/mha/mha1.cnf [server default] manager_log=/var/log/mha/mha1/manager manager_workdir=/var/log/mha/mha1 master_binlog_dir=/usr/local/mysql/data master_ip_failover_script=/usr/local/bin/master_ip_failover #添加脚本位置 password=123456 ping_interval=2 repl_password=123456 repl_user=rep ssh_user=root user=mha [server1] hostname=192.168.50.149 port=3306 [server2] hostname=192.168.50.151 port=3306 [server3] hostname=192.168.50.152 port=3306 [server4] hostname=192.168.50.153 port=3306
重启动mha管理端完成VIP漂移
ps -ef | grep mha | grep -v grep #查看mha进程 pkill perl #杀掉perl进程 nohup masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null >/var/log/mha/mha1/manager.log 2>&1 &
#启动进程
配置binlog-server备份服务器
主库宕机,也许会造成主库binlog复制不及时而导致数据丢失的情况出现,因此配置binlog-server进行时时同步备份,是必要的一种安全手段。
修改mha配置文件
vim /etc/mha/mha1.cnf 在最后添加模块 [binlog1] #添加binlog模块 no_master=1 #不允许切换为主 hostname=192.168.50.152 #本地IP master_binlog_dir=/data/mysql/binlog/ #binlog存放位置优先级比全局的高
修改后的文件
[server default] manager_log=/var/log/mha/mha1/manager manager_workdir=/var/log/mha/mha1 master_binlog_dir=/usr/local/mysql/data #全局binlog存放处 master_ip_failover_script=/usr/local/bin/master_ip_failover password=123456 ping_interval=2 repl_password=123456 repl_user=rep ssh_user=root user=mha [server1] hostname=192.168.50.149 port=3306 [server2] hostname=192.168.50.151 port=3306 [server3] hostname=192.168.50.152 port=3306 [server4] hostname=192.168.50.153 port=3306 [binlog1] no_master=1 hostname=192.168.50.152 master_binlog_dir=/data/mysql/binlog/
拉取主库上的binlog日志到mysql-db03的存放目录里
mkdir -p /data/mysql/binlog #创建存放目录 cd /data/mysql/binlog/ #进入存放目录 mysqlbinlog -R --host=192.168.50.149 --user=mha --password=123456 --raw --stop-never mysql-bin.000001 & #拉取主库binlog 主库IP ll #查看是否拉取了binlog ps -ef | grep mysqlbinlog | grep -v grep #查看拉取进程
nohup masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > /var/log/mha/mha1/manager.log 2>&1 &
#启动mha进程
ps -ef | grep perl | grep -v grep #查看mha进程
mysql中间件Atlas
Atlas主要功能
- 读写分离
- 从库负载均衡
- IP过滤
- 自动分表
- DBA可平滑上下线DB
- 自动摘除宕机的DB
安装Atlas
rpm -ivh Atlas-2.2.1.el6.x86_64.rpm Preparing... ########################################### [100%] package Atlas-2.2.1-1.x86_64 is already installed
配置Atlas
vim /usr/local/mysql-proxy/conf/test.cnf 12 proxy-backend-addresses = 192.168.50.5:3306 #这里添加VIP地址 15 proxy-read-only-backend-addresses = 192.168.50.152:3306@1,192.168.50.151:3306@1 #从库地址 18 pwds = root:++gAN07C/Q0=,mha:++gAN07C/Q0= #MySQL授权用户账号密码(密码要加密/usr/local/mysql-proxy/bin/encrypt加密工具来加密) 30 log-level = error #日志级别 36 sql-log = ON #打开日志 45 proxy-address = 192.168.0.53:33066 #Atlas的工作监听端口(提供代理服务) 48 admin-address = 192.168.0.53:1234 #Atlas的管理监听端口
启动mysqlbinlog日志备份的进程
mysqlbinlog -R --host=192.168.50.149 --port=3305 --user=mha --password=123456 --raw --stop-never mysql-bin.000001 &
主库IP 获取binlog日志
启动mha管理进程
nohup masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > /var/log/mha/mha1/manager.log 2>&1 &
启动Atlas服务
/usr/local/mysql-proxy/bin/mysql-proxyd test start
#说明:
#为何启动服务需要加test,因为在Atlas配置文件里定义了一个实例名字为test
#Atlas实际是启动了某个实例(当然也可以多实例)
登陆Atlas管理端口
mysql -uuser -ppwd -P1234 -h 192.168.50.152 #登陆Atlas管理端 select * from backends; #输入上边列表里的命令,出现下表 +-------------+-------------------+-------+------+ | backend_ndx | address | state | type | +-------------+-------------------+-------+------+ | 1 | 192.168.50.149:3307 | up | rw | #主库读写 | 2 | 192.168.50.151:3307 | up | ro | #从库读 | 3 | 192.168.50.152:3307 | up | ro | #从库读 +-------------+-------------------+-------+------+
在mysql-db03的本地登陆Atlas代理的3306端口
mysql -uroot -p123456 -h192.168.50.152 #必须创建用户root 且 host写成192.168.50.%才能使用 此时 atlas里授权的账号已实现读写分离 读负载均衡