说明:
app
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master1 master2
(db1) (db2)
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slave1 slave2
(db3) (db4)
mysql-mmm官网 http://mysql-mmm.org/start
mysql-mmm 系统CentOS 6.5 64位 Mysql版本 5.5.37,实验为5台测试机
monitor监控2主2从
master1和master2互为备份
slave1是master1的从
slave2是master2的从
ip地址
monitor 192.168.1.1
master1 192.168.1.2
master2 192.168.1.3
slave1 192.168.1.4
slave2 192.168.1.5
修改各主机的名字 /etc/sysconfig/network 比如monitor: HOSTNAME=monitor
修改各主机 /etc/hosts
192.168.1.1 monitor
192.168.1.2 db1
192.168.1.3 db2
192.168.1.4 db3
192.168.1.5 db4
配置monitor和各agent双机互信修改文件可以很方便
# ssh-keygen -t rsa
# for i in db1 db2 db3 db4; do ssh-copy-id -i ~/.ssh/id_rsa.pub root@$i;done
# for i in db1 db2 db3 db4; do ssh $i 'date';done #检测
如果时间不同步则
ntpdate 0.asia.pool.ntp.org ;hwclock -w
yum install ntp ntpdate -y
service ntpd restart
在其他节点和此节点时间同步 ntpdate monitor
如果提示ntpdate[35485]: no server suitable for synchronization found 是因为NTP server没有和其自身或者其他的server同步,则在 /etc/ntp.conf 添加以下,然后重启ntp服务
server 127.127.1.0 fudge
127.127.1.0 stratum 8
安装mysql-mmm:
下面是两种安装方式:
安装方式1:
所有服务器执行 wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm rpm -Uvh epel-release-6-8.noarch.rpm monitor执行: yum install mysql-mmm* mysql agent 执行: yum install mysql-mmm-agent
安装方式2:
yum install perl-CPAN #CPAN是perl的包管理器
perl -MCPAN -e shell#选择地区、国家和源
install Algorithm::Diff
install DBI
force install DBD::mysql
monitor要装的包
# perl -MCPAN -e shell cpan> install Algorithm::Diff cpan> install Class::Singleton cpan> install Log::Dispatch cpan> install Log::Log4perl cpan> install Mail::Send cpan> install Proc::Daemon cpan> install Thread::Queue cpan> install Time::HiRes cpan> install DBI cpan>install DBD::mysql
agent要装的包
# perl -MCPAN -e shell cpan> install Algorithm::Diff cpan> install DBI cpan>install Log::Dispatch cpan> install Log::Log4perl cpan> install Mail::Send cpan> install Net::ARP cpan> install Proc::Daemon cpan> install Time::HiRes cpan>install DBD::mysql cpan>install File::stat cpan>install File:basename
tar zxf mysql-mmm-2.2.1.tar.gz cd mysql-mmm-2.2.1 make instal mysql-mmm文件位置及作用如下: /usr/lib/perl5/vendor_perl/5.8.8/MMM MMM 使用的 perl 模块 /usr/lib/mysql-mmm MMM 的脚本�I件 /usr/sbin MMM 的命令保存路径 /var/log/mysql-mmm MMM 的日志保存路径 /etc MMM 配置文件保存的路径 /etc/mysql-mmm MMM 配置文件保存的路径,优先级最高 /etc/init.d/ agentd 和 monitor 的启劢关闭脚本
mysql安装略过
依次配置各个my.cnf 的server-id为1,2,3,4 比如db1:
server-id = 1
read_only = 1
配置mysql主主
master1:
mysql> grant replication slave on *.* to "zhuzhu"@"192.168.1.%" identified by "zhuzhu"; mysql> grant process, super, replication client on *.* to 'mmm_agent'@'192.168.1.%' identified by 'mmm_agent'; mysql> grant replication client on *.* to "mmm_monitor"@"192.168.1.%" identified by "mmm_monitor"; mysql> flush privileges; mysql> show master status\G
#查看master1 mysql-bin的日志文件名称和MASTER_LOG_POS的值,在master2上执行CHANGE MASTER TO MASTER_HOST 时使用,这里master1的MASTER_LOG_FILE='mysql-bin.000010',MASTER_LOG_POS=107
mysql> CHANGE MASTER TO MASTER_HOST='192.168.1.3',MASTER_USER='zhuzhu',MASTER_PASSWORD='zhuzhu',MASTER_PORT=3306,MASTER_LOG_FILE='mysql-bin.000006', MASTER_LOG_POS=1180,MASTER_CONNECT_RETRY=10; mysql> start slave; mysql> show slave status\G
master2:
mysql> grant replication slave on *.* to "zhuzhu"@"192.168.1.%" identified by "zhuzhu"; mysql> grant process, super, replication client on *.* to 'mmm_agent'@'192.168.1.%' identified by 'mmm_agent'; mysql> grant replication client on *.* to "mmm_monitor"@"192.168.1.%" identified by "mmm_monitor"; mysql> flush privileges; mysql> show master status\G
#查看master2 mysql-bin的日志文件名称和MASTER_LOG_POS的值,在master1上执行CHANGE MASTER TO MASTER_HOST 时使用,这里master2的MASTER_LOG_FILE='mysql-bin.000006',MASTER_LOG_POS=1180
mysql> CHANGE MASTER TO MASTER_HOST='192.168.1.2',MASTER_USER='zhuzhu',MASTER_PASSWORD='zhuzhu',MASTER_PORT=3306,MASTER_LOG_FILE='mysql-bin.000010', MASTER_LOG_POS=107,MASTER_CONNECT_RETRY=10; mysql> start slave; mysql> show slave status\G
配置mysql主从
slave1:
mysql> stop slave; mysql> CHANGE MASTER TO MASTER_HOST='192.168.1.2',MASTER_USER='zhuzhu',MASTER_PASSWORD='zhuzhu',MASTER_PORT=3306,MASTER_LOG_FILE='mysql-bin.000010', MASTER_LOG_POS=107,MASTER_CONNECT_RETRY=10; mysql> start slave; mysql> show slave status\G
slave2:
mysql> stop slave; mysql> CHANGE MASTER TO MASTER_HOST='192.168.1.3',MASTER_USER='zhuzhu',MASTER_PASSWORD='zhuzhu',MASTER_PORT=3306,MASTER_LOG_FILE='mysql-bin.000006', MASTER_LOG_POS=1180,MASTER_CONNECT_RETRY=10; mysql> start slave; mysql> show slave status\G
在两个slave上面创建monitor的账号
grant replication client on *.* to "mmm_monitor"@"192.168.1.%" identified by "mmm_monitor"; grant process, super, replication client on *.* to 'mmm_agent'@'192.168.1.%' identified by 'mmm_agent'; flush privileges; show slave status\G
在db1 新建用户,稍后用于测试
mysql> grant all on *.* to user@"192.168.1.%" identified by "123456";
mysql> flush privileges;
在db1创建一个表,在db4测试是否同步成功
mysql> create database testdb; Query OK, 1 row affected (0.02 sec) mysql> use testdb; Database changed mysql> create table user (id int(4),name varchar(10)); Query OK, 0 rows affected (0.07 sec) mysql> insert into user values(1,"tom"); Query OK, 1 row affected (0.01 sec)
配置mysql-mmm:
配置mmm_agent.conf
monitor: /etc/mysql-mmm目录下 mmm_agent.conf 注释#this db1
agent: db1(192.168.1.2)--db4(192.168.1.5) 上mmm_agent.conf 依次为this db1,,this db4
配置mmm_common.conf
monitor:
[root@monitor mysql-mmm]# vim mmm_common.conf active_master_role writer <host default> cluster_interface eth0 pid_path /var/run/mysql-mmm/mmm_agentd.pid bin_path /usr/libexec/mysql-mmm/ replication_user zhuzhu replication_password zhuzhu agent_user mmm_agent agent_password mmm_agent </host> <host db1> ip 192.168.1.2 mode master peer db2 </host> <host db2> ip 192.168.1.3 mode master peer db1 </host> <host db3> ip 192.168.1.4 mode slave </host> <host db4> ip 192.168.1.5 mode slave </host> <role writer> hosts db1, db2 ips 192.168.1.100 mode exclusive </role> <role reader> hosts db1,db2,db3,db4 ips 192.168.1.101, 192.168.1.102,192.168.1.103,192.168.1.104 mode balanced </role>
配置agent: 把此配置文件mmm_common.conf复制到各agent /etc/mysql-mmm
配置mmm_mon.conf
monitor:
[root@monitor mysql-mmm]# vim mmm_mon.conf include mmm_common.conf <monitor> ip 192.168.1.1 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 192.168.1.2,192.168.1.3,192.168.1.4,192.168.1.5 auto_set_online 60 # The kill_host_bin does not exist by default, though the monitor will # throw a warning about it missing. See the section 5.10 "Kill Host # Functionality" in the PDF documentation. # # kill_host_bin /usr/libexec/mysql-mmm/monitor/kill_host # </monitor> <host default> monitor_user mmm_monitor monitor_password mmm_monitor </host> debug 0
启动服务mysql-mmm:
先启agent,再启monitor,顺序不要错了
在各个agent节点启动服务# service mysql-mmm-agent restart
在monitor节点启动监控服务 # service mysql-mmm-monitor start
monitor节点查看
[root@monitor mysql-mmm]# mmm_control show
db1(192.168.1.2) master/ONLINE. Roles: reader(192.168.1.102), writer(192.168.1.100)
db2(192.168.1.3) master/ONLINE. Roles: reader(192.168.1.101)
db3(192.168.1.4) slave/ONLINE. Roles: reader(192.168.1.104)
db4(192.168.1.5) slave/ONLINE. Roles: reader(192.168.1.103)
[root@monitor mysql-mmm]# mmm_control checks all
db4 ping [last change: 2014/12/31 15:15:22] OK
db4 mysql [last change: 2014/12/31 15:15:22] OK
db4 rep_threads [last change: 2014/12/31 15:15:22] OK
db4 rep_backlog [last change: 2014/12/31 15:15:22] OK: Backlog is null
db2 ping [last change: 2014/12/31 15:15:22] OK
db2 mysql [last change: 2014/12/31 15:15:22] OK
db2 rep_threads [last change: 2014/12/31 15:15:22] OK
db2 rep_backlog [last change: 2014/12/31 15:15:22] OK: Backlog is null
db3 ping [last change: 2014/12/31 15:15:22] OK
db3 mysql [last change: 2014/12/31 15:15:22] OK
db3 rep_threads [last change: 2014/12/31 15:15:22] OK
db3 rep_backlog [last change: 2014/12/31 15:15:22] OK: Backlog is null
db1 ping [last change: 2014/12/31 15:15:22] OK
db1 mysql [last change: 2014/12/31 15:15:22] OK
db1 rep_threads [last change: 2014/12/31 15:15:22] OK
db1 rep_backlog [last change: 2014/12/31 15:15:22] OK: Backlog is null
查看db1的ip地址
[root@db1 mysql-mmm]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:0a:5e:93 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.2/24 brd 192.168.1.255 scope global eth0
inet 192.168.1.104/32 scope global eth0
inet 192.168.1.100/32 scope global eth0
inet6 fe80::20c:29ff:fe0a:5e93/64 scope link
valid_lft forever preferred_lft forever
检查及测试mysql-mmm:
在monitor节点登录可以写入的VIP
# mysql -uuser -p123456 -h 192.168.1.100
mysql> insert into user values(2,"jerry");
在db4查看是否有此数据
mysql> select * from testdb.user; +------+-------+ | id | name | +------+-------+ | 1 | tom | | 2 | jerry | +------+-------+ 2 rows in set (0.00 sec)
模拟主mysql服务关闭,测试VIP是否会移动到master2
在db1 service mysqld stop
monitor查看结果
[root@monitor mysql-mmm]# mmm_control show
db1(192.168.1.2) master/HARD_OFFLINE. Roles:
db2(192.168.1.3) master/ONLINE. Roles: reader(192.168.1.101), writer(192.168.1.100)
db3(192.168.1.4) slave/ONLINE. Roles: reader(192.168.1.102), reader(192.168.1.104)
db4(192.168.1.5) slave/ONLINE. Roles: reader(192.168.1.103)
然后把db1的mysql服务再次启动,在monitor查看
[root@monitor mysql-mmm]# mmm_control show
db1(192.168.1.2) master/ONLINE. Roles: reader(192.168.1.104)
db2(192.168.1.3) master/ONLINE. Roles: reader(192.168.1.101), writer(192.168.1.100)
db3(192.168.1.4) slave/ONLINE. Roles: reader(192.168.1.102)
db4(192.168.1.5) slave/ONLINE. Roles: reader(192.168.1.103)
手动把VIP迁移回db1
[root@monitor mysql-mmm]# mmm_control move_role writer db1
OK: Role 'writer' has been moved from 'db2' to 'db1'. Now you can wait some time and check new roles info!
[root@monitor mysql-mmm]# mmm_control show
db1(192.168.1.2) master/ONLINE. Roles: reader(192.168.1.104), writer(192.168.1.100)
db2(192.168.1.3) master/ONLINE. Roles: reader(192.168.1.101)
db3(192.168.1.4) slave/ONLINE. Roles: reader(192.168.1.102)
db4(192.168.1.5) slave/ONLINE. Roles: reader(192.168.1.103)
模拟slave节点当机:如果把db4直接关机,那么就出现下面的状态
monitor其他常用命令
mmm_control ping
mmm_control show
mmm_control checks all
mmm_control set_online db1
mmm_control move_role writer db1
mysql-mmm 数据一致性方面不是很好
mysql-mmm模拟master2(读)执行的时候加锁lock,往master1(写)插入数据后,把master1关闭(模拟当机),查看数据完整性
1,在master2(读)上面use testdb; lock tables user read;
2,这时候把master1(写)插入一条数据 use testdb; insert into user values (4,"marry");再service mysqld stop
3,master2上show processlist; unlock tables; select * from testdb.user;
4,master1现在为OFFLINE,master2为写入
5,再把master1 service mysqld start,master1 select * from testdb.user; 数据正常
不过slave插入了2条相同数据(master1 sql服务关闭前插入一条,VIP转移master2后又插入一条)
mysql-mmm problem
http://code.openark.org/blog/mysql/problems-with-mmm-for-mysql
http://www.xaprb.com/blog/2011/05/04/whats-wrong-with-mmm/