MySQL 高可用：mysql-mmm 部署
基本信息和规划：
#服务器信息：
====================================================================
ip address hostname ServerVersion MySql
------------ --------- -------------- -----------
192.168.100.151 server1 CentOS 5.6 MySql 5.0.95
192.168.100.12 server12 CentOS 5.6 MySql 5.6.30
192.168.100.13 server13 CentOS 5.6 MySql 5.6.30
192.168.100.14 server14 CentOS 5.6 MySql 5.6.30
====================================================================
#MySQL-MMM 信息：
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function ip address role VIP
-------- ------------ ------ ---------------
monitor 192.168.100.151 monitor 192.168.100.251
master/agent 192.168.100.12 witer 192.168.100.212
master/agent 192.168.100.13 reader 192.168.100.213
slave/agent 192.168.100.14 reader 192.168.100.214
====================================================================
说明：151 作为 monitor，12 与 13 进行主主复制，14 为 12 的从slave。
MySQL 下载地址：
http://dev.mysql.com/downloads/mysql/
http://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.12-linux-glibc2.5-i686.tar.gz
MySQL-MMM yum源下载地址：(注意服务器对应的版本：epel-release-X-X.noarch.rpm)
http://download.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm
安装 MySQL：（ip 12，13，14 ,151 均安装）
MySQL 安装（RPM安装模式）及目录结构
MySQL 安装（二进制安装模式）
MySQL 安装（源码安装模式）
MySQL 创建3个用户：（ip 12，13，14 ，151均创建）
GRANT REPLICATION CLIENT ON *.* TO 'mmm_monitor'@'192.168.100.%' IDENTIFIED BY 'mmm_monitor';
GRANT SUPER, REPLICATION CLIENT, PROCESS ON *.* TO 'mmm_agent'@'192.168.100.%' IDENTIFIED BY 'mmm_agent';
GRANT REPLICATION SLAVE ON *.* TO 'mmm_replication'@'192.168.100.%' IDENTIFIED BY 'mmm_replication';
FLUSH PRIVILEGES;
配置复制：
12 与 13 配置主主复制：MySQL 高可用：主主复制
12 与 14 配置主从复制：MySQL 高可用：主从复制
#MySQL配置（/etc/my.cnf）如下，注意 server-id 在每台服务器实例中都不一样，与ip一样方便区分。
# cd /var/log/
# mkdir mysql
# chown mysql:mysql mysql
#MySQL配置（/etc/my.cnf）如下，注意 server-id 在每台服务器实例中都不一样，与ip一样方便区分。
[mysqld]
basedir =/usr/local/mysql
datadir =/usr/local/mysql/data
socket=/tmp/mysql.sock
port = 3306
user=mysql
default-storage-engine = innodb
replicate-ignore-db = mysql,information_schema,performance_schema
binlog-ignore-db = mysql,information_schema,performance_schema
server-id = 12
log-bin = /var/log/mysql/mysql-bin.log
log_bin_index = /var/log/mysql/mysql-bin.log.index
relay_log = /var/log/mysql/mysql-bin.relay
relay_log_index = /var/log/mysql/mysql-bin.relay.index
expire_logs_days = 10
max_binlog_size = 100M
log_slave_updates = 1
MySQL-MMM 安装：
cd /usr/local/src
rpm -ivh epel-release-5-4.noarch.rpm
#agent节点安装（ip 12，13，14 执行）
yum -y install mysql-mmm.noarch mysql-mmm-tools.noarch mysql-mmm-agent.noarch
# monitor节点安装（ip 151 执行）
yum -y install mysql-mmm.noarch mysql-mmm-tools.noarch mysql-mmm-monitor.noarch
MySQL-MMM 配置：
#vi /etc/mysql-mmm/mmm_common.conf (ip 12，13，14，151 执行)
active_master_role writer
cluster_interface eth0
pid_path /var/run/mysql-mmm/mmm_agentd.pid
bin_path /usr/libexec/mysql-mmm/
replication_user mmm_replication
replication_password mmm_replication
agent_user mmm_agent
agent_password mmm_agent
ip 192.168.100.12
mode master
peer master13
ip 192.168.100.13
mode master
peer master12
ip 192.168.100.14
mode slave
hosts master12, master13
ips 192.168.100.251
mode exclusive
hosts master12, master13, master14
ips 192.168.100.212, 192.168.100.213, 192.168.100.214
mode balanced
#vi /etc/mysql-mmm/mmm_agent.conf (ip 12，13，14 执行)
#在 ip 12 改为
this master12
#在 ip 13 改为
this master13
#在 ip 14 改为
this master14
#vi /etc/mysql-mmm/mmm_mon.conf (ip 151 执行)
include mmm_common.conf
ip 192.168.100.151
pid_path /var/run/mysql-mmm/mmm_mond.pid
bin_path /usr/libexec/mysql-mmm
status_path /var/lib/mysql-mmm/mmm_mond.status
ping_ips 192.168.100.12, 192.168.100.13, 192.168.100.14
auto_set_online 60
monitor_user mmm_monitor
monitor_password mmm_monitor
debug 0
MySQL-MMM 启动
# 在 agent 启动（ip 12，13，14 执行）
# chkconfig mysql-mmm-agent on
# service mysql-mmm-agent start
/etc/init.d/mysql-mmm-agent start
# 在 monitor 启动（ip 151）
# chkconfig mysql-mmm-monitor on
# service mysql-mmm-monitor start
/etc/init.d/mysql-mmm-monitor start
配置完成！！！
# 在 monitor 检查和维护
mmm_control help #mmm_control 帮助信息
ping - ping monitor
show - show status
checks [|all [|all]] - show checks status
set_online - set host online
set_offline - set host offline
mode - print current mode.
set_active - switch into active mode.
set_manual - switch into manual mode.
set_passive - switch into passive mode.
move_role [--force] - move exclusive role to host
(Only use --force if you know what you are doing!)
set_ip - set role with ip to host
检查：
#monitor 启动服务器时，等待连接：
[root@server1 src]# mmm_control show
master12(192.168.100.12) master/AWAITING_RECOVERY. Roles:
master13(192.168.100.13) master/AWAITING_RECOVERY. Roles:
master14(192.168.100.14) slave/AWAITING_RECOVERY. Roles:
#正常情况下：
[root@server1 src]# mmm_control show
master12(192.168.100.12) master/ONLINE. Roles: reader(192.168.100.213)
master13(192.168.100.13) master/ONLINE. Roles: reader(192.168.100.214), writer(192.168.100.251)
master14(192.168.100.14) slave/ONLINE. Roles: reader(192.168.100.212)
#切换“writer”到 master12：
[root@server1 src]# mmm_control move_role writer master12
OK: Role 'writer' has been moved from 'master13' to 'master12'. Now you can wait some time and check new roles info!
#切换后：
[root@server1 src]# mmm_control show
master12(192.168.100.12) master/ONLINE. Roles: reader(192.168.100.213), writer(192.168.100.251)
master13(192.168.100.13) master/ONLINE. Roles: reader(192.168.100.214)
master14(192.168.100.14) slave/ONLINE. Roles: reader(192.168.100.212)
#验证群集
[root@server1 src]# mmm_control checks all
master12 ping [last change: 2016/04/23 18:33:14] OK
master12 mysql [last change: 2016/04/23 18:33:28] OK
master12 rep_threads [last change: 2016/04/23 18:33:14] OK
master12 rep_backlog [last change: 2016/04/23 18:33:14] OK: Backlog is null
master13 ping [last change: 2016/04/23 18:33:14] OK
master13 mysql [last change: 2016/04/23 18:33:14] OK
master13 rep_threads [last change: 2016/04/23 18:33:14] OK
master13 rep_backlog [last change: 2016/04/23 18:33:14] OK: Backlog is null
master14 ping [last change: 2016/04/23 18:33:14] OK
master14 mysql [last change: 2016/04/23 18:33:14] OK
master14 rep_threads [last change: 2016/04/23 18:33:14] OK
master14 rep_backlog [last change: 2016/04/23 18:33:14] OK: Backlog is null
测试：
#创建一个mysql测试帐户(在 ip 12，13，14 执行)
grant select,insert,update,delete on *.* to 'test'@'192.168.100.%' identified by 'test';
flush privileges;
#在 192.168.100.151 中连接 writer 角色的虚拟IP。可以操作数据。
mysql -h 192.168.100.251 -u test -p
#停止 192.168.100.12 （writer 角色）的 mysqld 服务
service mysqld stop
#查看群集信息，12 处于 HARD_OFFLINE 状态，writer 自动切换到 13。
[root@server1 src]# mmm_control show
master12(192.168.100.12) master/HARD_OFFLINE. Roles:
master13(192.168.100.13) master/ONLINE. Roles: reader(192.168.100.214), writer(192.168.100.251)
master14(192.168.100.14) slave/ONLINE. Roles: reader(192.168.100.212), reader(192.168.100.213)
#继续在刚才连接的 192.168.100.251 中操作数据。
1. 客户端将重新连接；
2. 操作数据时，13 写入，会同步到 14 中；
#启动 192.168.100.12 的 mysqld 服务（刚才操作的数据会从主库 13 同步到主库 12。群集中需要一点时间恢复）
service mysqld start
=========================================================================
测试二：双主高可用
=========================================================================
文档：https://launchpadlibrarian.net/368918243/mysql-mmm-2.2.2.pdf
安装：http://mysql-mmm.org/mmm2:guide
下载安装：
# 下载安装
wget http://mysql-mmm.org/_media/:mmm2:mysql-mmm-2.2.1.tar.gz
tar zxvf :mmm2:mysql-mmm-2.2.1.tar.gz
cd mysql-mmm-2.2.1
make install配置以下几个文件：
两台服务器配置一样，注意 cluster_interface 与现有的网卡名称一样
# vim /etc/mysql-mmm/mmm_common.conf
active_master_role writer
cluster_interface ens33
pid_path /var/run/mmm_agentd.pid
bin_path /usr/lib/mysql-mmm/
replication_user mmm_replication
replication_password mmm_replication
agent_user mmm_agent
agent_password mmm_agent
ip 192.168.1.171
mode master
peer server172
ip 192.168.1.172
mode master
peer server171
hosts server171, server172
ips 192.168.1.181
mode exclusive
hosts server171, server172
ips 192.168.1.182,192.168.1.183
mode balanced
每天服务器配置的不一样，只配置当前服务器名称（如本测试服务器 192.168.1.172 名称为 server172，另一台服务器同理）
vim /etc/mysql-mmm/mmm_agent.conf
include mmm_common.conf
this server172监控服务器只要一台
vim /etc/mysql-mmm/mmm_mon.conf
include mmm_common.conf
ip 127.0.0.1
pid_path /var/run/mmm_mond.pid
bin_path /usr/lib/mysql-mmm/
status_path /var/lib/misc/mmm_mond.status
ping_ips 192.168.1.171, 192.168.1.172
monitor_user mmm_monitor
monitor_password mmm_monitor
debug 0
# vim /etc/mysql-mmm/mmm_tools.conf
启动服务
service mysql-mmm-agent status
service mysql-mmm-monitor status
/etc/init.d/mysql-mmm-agent start
/etc/init.d/mysql-mmm-monitor start
chkconfig --add /etc/rc.d/init.d/mysql-mmm-agent
chkconfig --add /etc/rc.d/init.d/mysql-mmm-monitor检查 & 日志
mmm_control --help
mmm_control show
mmm_control checks all
# 日志
tail -f /var/log/mysql-mmm/mmm_mond.log
tail -f /var/log/mysql-mmm/mmm_agentd.log
测试，连接 writer 角色的虚拟IP。测试故障转移
# 测试，连接 writer 角色的虚拟IP
mysql -h 192.168.1.181 -u root -p
mysql -h 192.168.1.181 -P3306 -u test -p
show variables like 'server_id';
# writer 角色所在服务器 server172重启mysql实例，角色将切换
[root@server172 ~]# service mysqld stop
# 重启服务后，角色不会变
[root@server172 ~]# service mysqld start
# 设置在线后，此实例作为 reader 角色 （双主同步自动恢复）
[root@server172 ~]# mmm_control set_online server172