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[MySQL] mysql cluster解决方案

数据库 数据库 发布于：2021-07-04 09:36 | 阅读数：675 | 评论：0

　　Mysql cluster实验
　　1 测试环境：
　　1.1 软件系统版本
　　Gentoo 3.8.13
　　Mysql 5.1.67
　　Haproxy-1.4.24
　　1.2 架构
　　 DSC0000.jpg
　　1.3 主机信息
hostname

Network

interface

IP addr

note

主机编号

Mysql111

Enp2s1

192.168.254.111

master1

1

Mysql112

Enp2s1

192.168.254.112

master2

2

Mysql121

Enp2s1

192.168.254.121

master1/slave1

3

Mysql122

Enp2s1

192.168.254.122

master1/slave2

4

Mysql123

Enp2s1

192.168.254.123

master2/slave3

5

Mysql124

Enp2s1

192.168.254.124

master2/slave4

6

Haproxy110

Enp2s1

192.168.254.110

Double port

0

Enp2s4

192.168.254.120

1.Mysql111和mysql112为主主模式同步数据
2.Mysql121,mysql122,mysql123,mysql124和mysql111，mysql112为主从模式，其中mysql111和mysql121，mysql122为主从； mysql112和mysql123，mysql124为主从
3.当mysql112停止同步，mysql111为主库，代理停止发送请求到mysql112，mysql123，mysql124
4.当mysql111停止同步，mysql112为主库，代理停止发送请求到mysql111，mysql121，mysql122
5.当mysql111和mysql112同时停止同步，集群变为readonly状态
6.当mysql112宕机，mysql111为backup模式，haproxy停止发送请求到mysql112，mysql123，mysql124
7.当mysql111宕机，mysql112为backup模式，haproxy停止发送请求到mysql111，mysql121，mysql122
8.当mysql111和mysql112同时宕机，集群停止工作
2. 准备工作
主机1-6
Vi /etc/mysql/mysql.cnf
DSC0001.jpg
如果有注销掉，或者修改为0.0.0.0
重启数据库
/etc/init.d/mysql restart
3. 配置mysql111和mysql112主主同步
3.1 主机1上
Vi /etc/mysql/my.cnf
DSC0002.jpg
主机 2上
DSC0003.jpg
主机1和2上
/etc/init.d/mysql restart
添加同步用户
Mysql –uroot -p
Grant replication slave on *.* to ‘copy’@’192.168.254.%’ identified by ‘copy’;
DSC0004.jpg
如上图，root是原有的账号，copy是刚才添加的
记录日志文件名称和pos号
DSC0005.jpg

DSC0006.jpg


在主机1上
Change master to
Master_host=’192.168.254.112’,
Master_port=3306,
Master_user=’copy’,
Master_password=’copy’,
Master_log_file=’mysql-bin.000004’
Master_log_pos=’192’;
Start slave;
Show slave status
DSC0007.jpg
在主机2上
Change master to
Master_host=’192.168.254.111’,
Master_port=3306,
Master_user=’copy’,
Master_password=’copy’,
Master_log_file=’mysql-bin.000005’,
Master_log_pos=’106’;
Start slave;
Show slave status
DSC0008.jpg
测试主主同步的可用性
分别在主机1和主机2 上创建个数据库，然后看另一台主机上是否存在就可以了
4. 在主机1,2,3,4,5,6上配置主从同步
在主机3-6上
Vi /etc/mysql/my.cnf
DSC0009.jpg
备注：server-id不能相同，其他换成改主机主机号就可以了

重启mysql
/etc/init.d/mysql restart
在主机3-4上
Mysql –uroot –p
Change master to
Master_host=’192.168.254.111’,
Master_port=3306,
Master_user=’copy’,
Master_password=’copy’,
Master_log_file=’mysql-bin.000005’,
Master_log_pos=’106’;
Start slave;
Show slave status;
DSC00010.jpg
在主机5-6上
Mysql –uroot –p
Change master to
Master_host=’192.168.254.112’,
Master_port=3306,
Master_user=’copy’,
Master_password=’copy’,
Master_log_file=’mysql-bin.000004’,
Master_log_pos=’192’;
Start slave;
Show slave status;
DSC00011.jpg
测试
同上，分别在1和2上创建1个数据库，看是否同步
5 安装xinetd
在主机1-6上
Emerge –av xinetd
Rc-update add xinetd default
/etc/init.d/xinetd start
在主机1-2上
Vi /etc/xinetd.d/mysqlchk
#
# /etc/xinetd.d/mysqlchk
#
service mysqlchk_write
{
flags     = REUSE
socket_type = stream
port    = 9200
wait    = no
user    = nobody
server    = /opt/mysqlchk_status.sh
log_on_failure  += USERID
disable   = no
only_from   =192.168.254.0/24
}
service mysqlchk_replication
{
flags     = REUSE
socket_type = stream
port    = 9201
wait    = no
user    = nobody
server    = /opt/mysqlchk_replication.sh
log_on_failure  += USERID
disable   = no
only_from   = 192.168.254.0/24
}
添加服务端口
Mysqlchk_write9200/tcp# mysqlchk_write
Mysqlchk_replication9201/tcp# mysqlchk_replication
备注：
如果9200和9201端口被占用也可以使用其他端口号
在主机1上
Vi /opt/mysqlchk_status.sh
#!/bin/bash
MYSQL_HOST="localhost"
MYSQL_PORT="3306"
MYSQL_USERNAME="root"
MYSQL_PASSWORD="root"
ERROR_MSG=`/usr/bin/mysql --host=$MYSQL_HOST --port=$MYSQL_PORT --user=$MYSQL_USERNAME --password=$MYSQL_PASSWORD -e "show databases;" 2>dev/null`
if [ "$ERROR_MSG" != "" ]
then
# mysql is fine, return http 200
/bin/echo -e "HTTP/1.1 200 OK\r\n"
/bin/echo -e "Content-Type: Content-Type:text\r\n"
/bin/echo -e "\r\n"
/bin/echo -e "MySQL is running.\r\n"
/bin/echo -e "\r\n"
else
#mysql is down, return http 503
/bin/echo -e "HTTP/1.1 503 Service Unavailable\r\n"
/bin/echo -e "Content-Type: Content-Type:text/plain\r\n"
/bin/echo -e "\r\n"
/bin/echo -e "MYSQL is *down*.\r\n"
/bin/echo -e "\r\n"
fi
Vi /opt/mysqlchk_replication.sh
#!/bin/bash
MYSQL_HOST="localhost"
MYSQL_PORT="3306"
MYSQL_USERNAME="root"
MYSQL_PASSWORD="root"
/usr/bin/mysql --host=$MYSQL_HOST --port=$MYSQL_PORT --user=$MYSQL_USERNAME --password=$MYSQL_PASSWORD -e "show slave status;" > /tmp/check_repl.txt
iostat=`grep "Slave_IO_Running" /tmp/check_repl.txt | awk '{print $2}'`
sqlstat=`grep "Slave_SQL_Running" /tmp/check_repl.txt | awk '{print $2}'`
#echo iostat:$iostat and sqlstat:$sqlstat
if [ "$iostat" = "No" ] || [ "$sqlstat" = "No" ];
then
#mysql is down,return http 503
/bin/echo -e "HTTP/1.1 503 Service Unavailable\r\n"
/bin/echo -e "Content-Type: Content-Type:text/plain\r\n"
/bin/echo -e "\r\n"
/bin/echo -e "MySQL replication is *down*.\r\n"
/bin/echo -e "\r\n"
else
#mysql is fine,return http 200
/bin/echo -e "HTTP/1.1 200 OK\r\n"
/bin/echo -e "Content-Type: Content-Type:text/plain\r\n"
/bin/echo -e "\r\n"
/bin/echo -e "MySQL replication is running.\r\n"
/bin/echo -e "\r\n"
fi
在主机2上
Vi /opt/mysqlchk_status.sh
#!/bin/bash
MYSQL_HOST="localhost"
MYSQL_PORT="3306"
MYSQL_USERNAME="root"
MYSQL_PASSWORD="root"
ERROR_MSG=`/usr/bin/mysql --host=$MYSQL_HOST --port=$MYSQL_PORT --user=$MYSQL_USERNAME --password=$MYSQL_PASSWORD -e "show databases;" 2>dev/null`
if [ "$ERROR_MSG" != "" ]
then
# mysql is fine, return http 200
/bin/echo -e "HTTP/1.1 200 OK\r\n"
/bin/echo -e "Content-Type: Content-Type:text\r\n"
/bin/echo -e "\r\n"
/bin/echo -e "MySQL is running.\r\n"
/bin/echo -e "\r\n"
else
#mysql is down, return http 503
/bin/echo -e "HTTP/1.1 503 Service Unavailable\r\n"
/bin/echo -e "Content-Type: Content-Type:text/plain\r\n"
/bin/echo -e "\r\n"
/bin/echo -e "MYSQL is *down*.\r\n"
/bin/echo -e "\r\n"
fi
Vi /opt/mysqlchk_replication.sh
#!/bin/bash
MYSQL_HOST="localhost"
MYSQL_PORT="3306"
MYSQL_USERNAME="root"
MYSQL_PASSWORD="root"
/usr/bin/mysql --host=$MYSQL_HOST --port=$MYSQL_PORT --user=$MYSQL_USERNAME --password=$MYSQL_PASSWORD -e "show slave status;" > /tmp/check_repl.txt
iostat=`grep "Slave_IO_Running" /tmp/check_repl.txt | awk '{print $2}'`
sqlstat=`grep "Slave_SQL_Running" /tmp/check_repl.txt | awk '{print $2}'`
#echo iostat:$iostat and sqlstat:$sqlstat
if [ "$iostat" = "No" ] || [ "$sqlstat" = "No" ];
then
#mysql is down,return http 503
/bin/echo -e "HTTP/1.1 503 Service Unavailable\r\n"
/bin/echo -e "Content-Type: Content-Type:text/plain\r\n"
/bin/echo -e "\r\n"
/bin/echo -e "MySQL replication is *down*.\r\n"
/bin/echo -e "\r\n"
else
#mysql is fine,return http 200
/bin/echo -e "HTTP/1.1 200 OK\r\n"
/bin/echo -e "Content-Type: Content-Type:text/plain\r\n"
/bin/echo -e "\r\n"
/bin/echo -e "MySQL replication is running.\r\n"
/bin/echo -e "\r\n"
fi
在主机3-6上
Vi /etc/xinetd.d/mysqlchk
#
# /etc/xinetd.d/mysqlchk
#
#
service mysqlchk_replication
{
flags       = REUSE
socket_type   = stream
port      = 9201
wait      = no
user      = nobody
server      = /opt/mysqlchk_replication.sh
log_on_failure    += USERID
disable     = no
only_from     = 192.168.254.0/24
}
Vi /opt/mysqlchk_replication.sh
#!/bin/bash
MYSQL_HOST="localhost"
MYSQL_PORT="3306"
MYSQL_USERNAME="root"
MYSQL_PASSWORD="root"
/usr/bin/mysql --host=$MYSQL_HOST --port=$MYSQL_PORT --user=$MYSQL_USERNAME --password=$MYSQL_PASSWORD -e "show slave status\G">/tmp/check_repl.txt
iostat=`grep "Slave_IO_Running" /tmp/check_repl.txt | awk '{print $2}'`
sqlstat=`grep "Slave_SQL_Running" /tmp/check_repl.txt | awk '{print $2}'`
# echo iostat:$iostat and sqlstat:$sqlstat
if [ "$iostat" = "No" ] || [ "$sqlstat" = "No" ]
then
#mysql is down,return http 503
/bin/echo -e "HTTP/1.1 503 Service Unavailable\r\n"
/bin/echo -e "Content-Type: Content-Type:text/plain\r\n"
/bin/echo -e "\r\n"
/bin/echo -e "MySQL replication is *down*.\r\n"
/bin/echo -e "\r\n"
else
#mysql is fine,return http 200
/bin/echo -e "HTTP/1.1 200 OK\r\n"
/bin/echo -e "Content-Type: Content-Type:text/plain\r\n"
/bin/echo -e "\r\n"
/bin/echo -e "MySQL replication is running.\r\n"
/bin/echo -e "\r\n"
fi
在主机1-6上
Chmod +x /opt/mysql*.sh
重启系统或者重启xinetd
reboot
|| /etc/init.d/xinetd restart
查看监听端口
在主机1-2上
DSC00012.jpg
如上图9201和9200开始监听
在主机3-6上
DSC00013.jpg
如上图9201开始监听
7 haproxy 安装配置
下载haproxy*.tar.gz，这里我下载的是最新版本1.4.24
Tar zxvf haproxy-1.4.24.tar.gz
Cd haproxy-1.4.24
Make TARGET=linux2628
Make install
配置haproxy配置文件
## 在源码包里example目录下有个，可以参考！这里配置如下
Vi /etc/haproxy.cfg
global
maxconn 40000
debug
#quiet
user haproxy
group haproxy
nbproc 1
log 127.0.0.1 local3
spread-checks 2
defaults
timeout server 3s
timeout connect 3s
timeout client 60s
timeout http-request 3s
timeout queue 3s
frontend db_write
bind 192.168.254.110:3306
default_backend cluster_db_write
frontend db_read
bind 192.168.254.120:3306
default_backend cluster_db_read
frontend web_haproxy_status
bind *:80
default_backend web_status
frontend monitor_mysql111
bind 127.0.0.1:9301
mode http
acl no_repl_mysql111 nbsrv(mysql111_replication) eq 0
acl no_repl_mysql112 nbsrv(mysql112_replication) eq 0
acl no_mysql111 nbsrv(mysql111_status) eq 0
acl no_mysql112 nbsrv(mysql112_status) eq 0
monitor-uri /dbs
monitor fail unless no_repl_mysql111 no_repl_mysql112 no_mysql112
monitor fail if no_mysql111 no_mysql112
frontend monitor_mysql112
bind 127.0.0.1:9302
mode http
acl no_repl_mysql111 nbsrv(mysql111_replication) eq 0
acl no_repl_mysql112 nbsrv(mysql112_replication) eq 0
acl no_mysql111 nbsrv(mysql111_status) eq 0
acl no_mysql112 nbsrv(mysql112_status) eq 0
monitor-uri /dbs
monitor fail unless no_repl_mysql111 no_repl_mysql112 no_mysql111
monitor fail if no_mysql111 no_mysql112
frontend monitor_mysql121
bind 127.0.0.1:9303
mode http
acl no_repl_mysql121 nbsrv(mysql121_replication) eq 0
acl no_repl_mysql111 nbsrv(mysql111_replication) eq 0
acl no_mysql112 nbsrv(mysql112_status) eq 1
monitor-uri /dbs
monitor fail if no_repl_mysql121
monitor fail if no_repl_mysql111  no_mysql112
frontend monitor_mysql122
bind 127.0.0.1:9304
mode http
acl no_repl_mysql122 nbsrv(mysql122_replication) eq 0
acl no_repl_mysql111 nbsrv(mysql111_replication) eq 0
acl no_mysql112 nbsrv(mysql112_status) eq 1
monitor-uri /dbs
monitor fail if no_repl_mysql122
monitor fail if no_repl_mysql111 no_mysql112
frontend monitor_mysql123
bind 127.0.0.1:9305
mode http
acl no_repl_mysql123 nbsrv(mysql123_replication) eq 0
acl no_repl_mysql112 nbsrv(mysql112_replication) eq 0
acl no_mysql111 nbsrv(mysql111_status) eq 1
monitor-uri /dbs
monitor fail if no_repl_mysql123
monitor fail if no_repl_mysql112 no_mysql111
frontend monitor_mysql124
bind 127.0.0.1:9306
mode http
acl no_repl_mysql124 nbsrv(mysql124_replication) eq 0
acl no_repl_mysql112 nbsrv(mysql112_replication) eq 0
acl no_mysql111 nbsrv(mysql111_status) eq 1
monitor-uri /dbs
monitor fail if no_repl_mysql124
monitor fail if no_repl_mysql112 no_mysql111
frontend monitor_splitbrain
bind 127.0.0.1:9300
mode http
acl no_repl01 nbsrv(mysql111_replication) eq 0
acl no_repl02 nbsrv(mysql112_replication) eq 0
acl mysql111 nbsrv(mysql111_status) eq 1
acl mysql112 nbsrv(mysql112_status) eq 1
monitor-uri /dbs
monitor fail unless no_repl01 no_repl02 mysql111 mysql112
backend mysql111_replication
mode tcp
balance roundrobin
option tcpka
option httpchk
server mysql111 192.168.254.111:3306 check port 9201 inter 1s rise 1 fall 1
backend mysql112_replication
mode tcp
balance roundrobin
option tcpka
option httpchk
server mysql112 192.168.254.112:3306 check port 9201 inter 1s rise 1 fall 1
backend mysql121_replication
mode tcp
balance roundrobin
option tcpka
option httpchk
server mysql121 192.168.254.121:3306 check port 9201 inter 1s rise 1 fall 1
backend mysql122_replication
mode tcp
balance roundrobin
option tcpka
option httpchk
server mysql122 192.168.254.122:3306 check port 9201 inter 1s rise 1 fall 1
backend mysql123_replication
mode tcp
balance roundrobin
option tcpka
option httpchk
server mysql123 192.168.254.123:3306 check port 9201 inter 1s rise 1 fall 1
backend mysql124_replication
mode tcp
balance roundrobin
option tcpka
option httpchk
server mysql124 192.168.254.124:3306 check port 9201 inter 1s rise 1 fall 1
backend mysql111_status
mode tcp
balance roundrobin
option tcpka
option httpchk
server mysql111 192.168.254.111:3306 check port 9200 inter 1s rise 2 fall 2
backend mysql112_status
mode tcp
balance roundrobin
option tcpka
option httpchk
server mysql112 192.168.254.112:3306 check port 9200 inter 1s rise 2 fall 2
backend cluster_db_write
mode tcp
option tcpka
balance roundrobin
option httpchk GET /dbs
server mysql111 192.168.254.111:3306 weight 1 check port 9201 inter 1s rise 5 fall 1
server mysql112 192.168.254.112:3306 weight 1 check port 9201 inter 1s rise 5 fall 1 backup
server mysql111_backup 192.168.254.111:3306 weight 1 check port 9301 inter 1s rise 2 fall 2 addr 127.0.0.1 backup
server mysql112_backup 192.168.254.112:3306 weight 1 check port 9302 inter 1s rise 2 fall 2 addr 127.0.0.1 backup
backend cluster_db_read
mode tcp
option tcpka
balance roundrobin
option httpchk GET /dbs
server mysql111 192.168.254.111:3306 weight 1 track cluster_db_write/mysql111
server mysql112 192.168.254.112:3306 weight 1 track cluster_db_write/mysql112
server mysql111_backup 192.168.254.111:3306 weight 1 track cluster_db_write/mysql111_backup
server mysql112_backup 192.168.254.112:3306 weight 1 track cluster_db_write/mysql112_backup
server mysql111_splitbrain 192.168.254.111:3306 weight 1 check port 9300 inter 1s rise 1 fall 2 addr 127.0.0.1
server mysql112_splitbrain 192.168.254.112:3306 weight 1 check port 9300 inter 1s rise 1 fall 2 addr 127.0.0.1
server mysql121_slave 192.168.254.121:3306 weight 1 check port 9303 inter 1s rise 5 fall 1 addr 127.0.0.1
server mysql122_slave 192.168.254.122:3306 weight 1 check port 9304 inter 1s rise 5 fall 1 addr 127.0.0.1
server mysql123_slave 192.168.254.123:3306 weight 1 check port 9305 inter 1s rise 5 fall 1 addr 127.0.0.1
server mysql124_slave 192.168.254.124:3306 weight 1 check port 9306 inter 1s rise 5 fall 1 addr 127.0.0.1
backend web_status
mode http
stats enable
#stats scope
#stats hide-version
stats refresh 5s
stats uri /status
stats realm Haproxy/statistics
stats auth copy:copy
启动haproxy
/usr/local/sbin/haproxy –f /etc/haproxy.cfg
查看状态
DSC00014.jpg
访问haproxy监控页面
http://192.168.254.110/status
DSC00015.jpg

DSC00016.jpg


到这里配置完成
测试，按照以下步骤看是否可以达到要求
1.停止主机2,的同步
2.停止主机1,2的同步
3.停止主机1的同步
4.断开主机1网络或者关闭它
5.断开主机2网络或者关闭它
6.同时端口主机1,2网络或者关闭它们

　　
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