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cobar mysql 高可用

发表于：2025-01-20 作者：千家信息网编辑

千家信息网最后更新 2025年01月20日，---------------------------------------------server2 IP:172.25.38.2server5 IP:172.25.38.5-----------

千家信息网最后更新 2025年01月20日cobar mysql 高可用

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server2 IP:172.25.38.2

server5 IP:172.25.38.5

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1）安装mysql [server2]、[server5]

yum install -y mysql-server

rpm -qa|grep mysql##安装好，可见已安装的包

mysql-libs-5.1.71-1.el6.x86_64

mysql-5.1.71-1.el6.x86_64

mysql-server-5.1.71-1.el6.x86_64

[server2] ##编辑mysql配置文件

vim /etc/my.cnf

[mysqld]

datadir=/var/lib/mysql

socket=/var/lib/mysql/mysql.sock

user=mysql

# Disabling symbolic-links is recommended to prevent assorted security risks

symbolic-links=0

server-id=2

binlog-do-db=dbtest

binlog-ignore-db=mysql

log-bin=mysql-bin

master-host=172.25.38.5

master-user=ly

master-password=westos

master-port=3306

replicate-ignore-db=mysql

replicate-do-db=dbtest

[mysqld_safe]

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

当配置server2为主时，server5为从时，把以#开头的，把#去掉

[server5]

vim /etc/my.cnf

[mysqld]

datadir=/var/lib/mysql

socket=/var/lib/mysql/mysql.sock

user=mysql

symbolic-links=0

server-id=5

log-bin=mysql-bin

binlog-do-db=dbtest

binlog-ignore-db=mysql

#master-host=172.25.38.2

#master-user=ly

#master-password=westos

#master-port=3306

#replicate-ignore-db=mysql

#replicate-do-db=dbtest

[mysqld_safe]

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

log-error=/var/log/mysqld.log

/etc/init.d/mysqld start##开启数据库

mysqladmin -u root password westos##设置密码

[root@server5 ~]# mysql -p##进入数据库设置

Enter password:

mysql> create user ly@'172.25.38.5' identified by 'westos';##创建用户并设置密码

mysql> grant all on *.* to ly@'172.25.38.5';##授予权限

mysql> flush privleges;##刷新

mysql> show master status;##主节点状态

+------------------+----------+--------------+------------------+

+------------------+----------+--------------+------------------+

+------------------+----------+--------------+------------------+

1 row in set (0.00 sec)

[root@server2 ~]# mysql -p

Enter password:

mysql> change master to master_host='172.25.38.2',master_user='ly',master_password='westos';

mysql> start slave;##开启从节点

mysql> show slave status\G;##查看从的状态

*************************** 1. row ***************************

Slave_IO_State: Waiting for master to send event

Master_Host: 172.25.38.5

Master_User: ly

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: mysql-bin.000004

Read_Master_Log_Pos: 254

Relay_Log_File: mysqld-relay-bin.000005

Relay_Log_Pos: 399

Relay_Master_Log_File: mysql-bin.000004

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

Replicate_Do_DB: dbtest

Replicate_Ignore_DB: mysql

##做同样类似操作，最后做出双向主从同步

[root@server2 ~]# mysql -p

Enter password:

mysql> create user ly@'172.25.38.2' identified by 'westos';

mysql> grant all on *.* to ly@'172.25.38.2';

mysql> flush privileges;

mysql> show master status;

+------------------+----------+--------------+------------------+

+------------------+----------+--------------+------------------+

+------------------+----------+--------------+------------------+

1 row in set (0.00 sec)

[root@server5 ~]# mysql -p

Enter password:

mysql> change master to master_host='172.25.38.2',master_user='ly',master_password='westos';

mysql> start slave;

mysql> show slave status\G;

*************************** 1. row ***************************

Slave_IO_State: Waiting for master to send event

Master_Host: 172.25.38.5

Master_User: ly

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: mysql-bin.0000012

Read_Master_Log_Pos: 254

Relay_Log_File: mysqld-relay-bin.0000013

Relay_Log_Pos: 106

Relay_Master_Log_File: mysql-bin.0000012

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

Replicate_Do_DB: dbtest

Replicate_Ignore_DB: mysql

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2)安装heartbeat [server2]、[server5]

得到如下安装包

heartbeat-3.0.4-2.el6.x86_64.rpm

heartbeat-devel-3.0.4-2.el6.x86_64.rpm

heartbeat-libs-3.0.4-2.el6.x86_64.rpm

ldirectord-3.9.5-3.1.x86_64.rpm

yum install openssl perl-Net-SSLeay perl-TimeDate perl-libwww-perl perl-Compress-Zlib perl-HTML-Parser perl-HTML-Tagset ipvsadm -y##解决依赖性

rpm -ivh heartbeat-libs-3.0.4-2.el6.x86_64.rpm ldirectord-3.9.5-3.1.x86_64.rpm heartbeat-3.0.4-2.el6.x86_64.rpm heartbeat-devel-3.0.4-2.el6.x86_64.rpm

vim /etc/ha.d/ha.cf##编辑配置

34 logfacility local0

48 keepalive 2

56 deadtime 30

61 warntime 10

71 initdead 60

76 udpport 694##端口

91 bcast eth0 # Linux

157 auto_failback on

211 node server5.example.com

212 node server2.example.com

222 ping 172.25.38.250##一个同一网段可ping的IP，最好是网关

255 respawn hacluster /usr/lib64/heartbeat/ipfail

261 apiauth ipfail gid=haclient uid=hacluster

vim /etc/ha.d/haresources##资源配置

server5.example.com IPaddr::172.25.38.100/24/eth0 drbddisk::example Filesystem::/dev/drbd1::/var/lib/mysql::ext4 mysqld

vim /etc/ha.d/authkeys

auth 1

1 crc

#2 sha1 HI!

#3 md5 Hello!

两台配置一样，直接scp过去就好。

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3）配置drbd

在两台主机上添加硬盘，最好一样大小，方便操作

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得到如下包

drbd-8.4.2.tar.gz

或者8个如下安装包

drbd-8.4.2-2.el6.x86_64.rpm

drbd-xen-8.4.2-2.el6.x86_64.rpm

drbd-udev-8.4.2-2.el6.x86_64.rpm

drbd-utils-8.4.2-2.el6.x86_64.rpm

drbd-pacemaker-8.4.2-2.el6.x86_64.rpm

drbd-heartbeat-8.4.2-2.el6.x86_64.rpm

drbd-bash-completion-8.4.2-2.el6.x86_64.rpm

drbd-km-2.6.32_431.el6.x86_64-8.4.2-2.el6.x86_64.rpm

以tar包方式进行安装如下：

rpm -ivh drbd-*

yum install gcc flex rpm-build kernel-devel -y

cp /root/drbd-8.4.0.tar.gz /root/rpmbuild/SOURCES/

tar zxf drbd-8.4.0.tar.gz

cd drbd-8.4.0

./configure --enable-spec

./configure --enable-spec --with-km

在当前目录下得到两个文件

drbd.spec drbd-km.spec

rpmbuild -bb drbd.spec

rpmbuild -bb drbd-km.spec

cd /root/rpmbuild/RPMS/x86_64

rpm -ivh *

scp /root/rpmbuild/RPMS/x86_64/* 172.25.38.5:/root

并且执行 rpm -ivh drbd-*

vim /etc/drbd.d/example.res

1 resource example {

2 meta-disk internal;

3 device /dev/drbd1;

4 syncer {

5 verify-alg sha1;

6 }

7 on server5.example.com {

8 disk /dev/vdb;

9 address 172.25.38.5:7789;

10 }

11 on server2.example.com {

12 disk /dev/vdb;

13 address 172.25.38.2:7789;

14 }

15 }

drbdadm create-md example

/etc/init.d/drbd start

drbdadm primary example

cat /proc/drbd#在两台主机上查看同步状态

mkfs.ext4 /dev/drbd1#数据同步结束后创建文件系统

mount /dev/drbd1 /var/www/html#挂载文件系统

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4)安装jdk

得到

jdk-6u32-linux-x64.bin

sh jdk-6u32-linux-x64.bin

mv jdk-6u32-linux-x64 java

mv java /usr/local

vim /etc/profile

export JAVA_HOME=/usr/local/java

export CLASSPATH=.:$JAVA_HOME/bin:$JAVA_HOME/jre/lib

export PATH=$PATH:$JAVA_HOME/bin

source /etc/profile

cd /home/

测试:

vim test.java

class test {

public static void main(String[] args)

{

System.out.println("Hello world!");

}

java test

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5) 安装cobar

cobar-server-1.2.6.zip

unzip cobar-server-1.2.6.zip

cd /root/cobar-server-1.2.6/conf

vim schema.xml

172.25.38.5:3306/dbtest

root

westos

STRICT_TRANS_TABLES

vim server.xml

westos

dbtest

512

cd /root/cobar-server-1.2.6/bin

[root@server2 bin]# ./startup.sh

"/usr/local/java/bin/java" -Dcobar.home="/root/cobar-server-1.2.6" -classpath "/root/cobar-server-1.2.6/conf:/root/cobar-server-1.2.6/lib/classes:/root/cobar-server-1.2.6/lib/cobar-common-1.2.6.jar:/root/cobar-server-1.2.6/lib/cobar-config-1.2.6.jar:/root/cobar-server-1.2.6/lib/cobar-net-1.2.6.jar:/root/cobar-server-1.2.6/lib/cobar-parser-1.2.6.jar:/root/cobar-server-1.2.6/lib/cobar-route-1.2.6.jar:/root/cobar-server-1.2.6/lib/cobar-server-1.2.6.jar:/root/cobar-server-1.2.6/lib/log4j-1.2.16.jar:/root/cobar-server-1.2.6/lib/slf4j-api-1.6.4.jar:/root/cobar-server-1.2.6/lib/slf4j-log4j12-1.6.4.jar" -server -Xms1024m -Xmx1024m -Xmn256m -Xss128k -XX:+AggressiveOpts -XX:+UseBiasedLocking -XX:+UseFastAccessorMethods -XX:+DisableExplicitGC -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:+UseCMSCompactAtFullCollection -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=75 com.alibaba.cobar.CobarStartup >> "/root/cobar-server-1.2.6/logs/console.log" 2>&1 &

[root@server2 bin]# /etc/init.d/drbd start

Starting DRBD resources: [

]

[root@server2 bin]# ip addr show

1: lo: 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: mtu 1500 qdisc pfifo_fast state UP qlen 1000

link/ether 52:54:00:f6:11:cd brd ff:ff:ff:ff:ff:ff

inet 172.25.38.2/24 brd 172.25.38.255 scope global eth0