实验环境:
操作系统:linux-rhel-server-5.4
系统内核版本:2.6.18-164.el5
地址规划:
node1 node1.a.com 192.168.2.10
node2 node2.a.com 192.168.2.20
vip : 192.168.2.100
实验所需安装包:
cluster-glue-1.0.6-1.6.el5.i386.rpm 为了在群集中增加对更多节点的支持
cluster-glue-libs-1.0.6-1.6.el5.i386.rpm
corosync-1.2.7-1.1.el5.i386.rpmcorosync 的主配置文件
corosynclib-1.2.7-1.1.el5.i386.rpm corosync 的库文件
heartbeat-3.0.3-2.3.el5.i386.rpm 我们的heartbeat 在这里是做四层的资源代理用的
heartbeat-libs-3.0.3-2.3.el5.i386.rpm heartbeat 的库文件
libesmtp-1.0.4-5.el5.i386.rpm
openais-1.1.3-1.6.el5.i386.rpm 做丰富pacemake 的内容使用
openaislib-1.1.3-1.6.el5.i386.rpm openais 的库文件
pacemaker-1.1.5-1.1.el5.i386.rpm pacemake 的主配置文档
pacemaker-libs-1.1.5-1.1.el5.i386.rpm pacemaker 的库文件
pacemaker-cts-1.1.5-1.1.el5.i386.rpm
perl-TimeDate-1.16-5.el5.noarch.rpm
resource-agents-1.0.4-1.1.el5.i386.rpm 开启资源代理用的
mysql-5.5.15-linux2.6-i686.tar.gz mysql 的绿色软件
实验步骤:
node1:
修改地址和主机名:
[root@localhost ~]# vim /etc/sysconfig/network
[root@localhost ~]# hostname node1.a.com
[root@node1 ~]# setup
[root@node1 ~]# service network restart
编辑hosts文件:
[root@node1 ~]# vim /etc/hosts
node2:
修改地址和主机名:
[root@mail ~]# vim /etc/sysconfig/network
[root@mail ~]# hostname node2.a.com
[root@node2 ~]# setup
[root@node2 ~]# service network restart
编辑hosts文件:
[root@node2 ~]# vim /etc/hosts
node1
两个主机时间同步:
[root@node1 ~]# hwclock -s
[root@node2 ~]# hwclock –s
两个主机上产生密钥实现无密码的通讯:
[root@node1 ~]# ssh-keygen -t rsa
[root@node1 ~]# ssh-copy-id -i .ssh/id_rsa.pub node2
[root@node2 ~]# ssh-keygen -t rsa
[root@node2 ~]# ssh-copy-id -i .ssh/id_rsa.pub node1
导入安装所需包:
[root@node1 ~]# ll
drwxr-xr-x 2 root root 4096 Feb 17 21:19 Desktop
-rw-r--r-- 1 root root 100168525 Feb 17 21:21 VMwareTools-6.5.0-118166.tar.gz
-rw------- 1 root root 1330 Feb 8 01:27 anaconda-ks.cfg
-rw-rw-rw- 1 root root 8316839 Mar 6 13:09 bind-9.7.4.tar.gz
-rw-r--r-- 1 root root 271360 May 13 15:01 cluster-glue-1.0.6-1.6.el5.i386.rpm
-rw-r--r-- 1 root root 133254 May 13 15:01 cluster-glue-libs-1.0.6-1.6.el5.i386.rpm
-rw-r--r-- 1 root root 170052 May 13 15:01 corosync-1.2.7-1.1.el5.i386.rpm
-rw-r--r-- 1 root root 158502 May 13 15:01 corosynclib-1.2.7-1.1.el5.i386.rpm
-rwxr-xr-x 1 root root 907 Feb 18 21:13 disk.sh
-rw-r--r-- 1 root root 221868 May 13 15:01 drbd83-8.3.8-1.el5.centos.i386.rpm
-rw-r--r-- 1 root root 165591 May 13 15:01 heartbeat-3.0.3-2.3.el5.i386.rpm
-rw-r--r-- 1 root root 289600 May 13 15:01 heartbeat-libs-3.0.3-2.3.el5.i386.rpm
-rw-r--r-- 1 root root 1666 Feb 18 22:34 inittab
-rw-r--r-- 1 root root 35236 Feb 8 01:27 install.log
-rw-r--r-- 1 root root 3995 Feb 8 01:26 install.log.syslog
-rw-r--r-- 1 root root 125974 May 13 15:01 kmod-drbd83-8.3.8-1.el5.centos.i686.rpm
-rw-r--r-- 1 root root 44377 May 13 15:01 ldirectord-1.0.1-1.el5.i386.rpm
-rw-r--r-- 1 root root 60458 May 13 15:01 libesmtp-1.0.4-5.el5.i386.rpm
-rw-r--r-- 1 root root 37158912 May 13 15:01 mysql-5.5.15-linux2.6-i686.tar.gz
-rw-r--r-- 1 root root 207085 May 13 15:01 openais-1.1.3-1.6.el5.i386.rpm
-rw-r--r-- 1 root root 94614 May 13 15:01 openaislib-1.1.3-1.6.el5.i386.rpm
-rw-r--r-- 1 root root 796813 May 13 15:01 pacemaker-1.1.5-1.1.el5.i386.rpm
-rw-r--r-- 1 root root 207925 May 13 15:01 pacemaker-cts-1.1.5-1.1.el5.i386.rpm
-rw-r--r-- 1 root root 332026 May 13 15:01 pacemaker-libs-1.1.5-1.1.el5.i386.rpm
-rw-r--r-- 1 root root 1640 Feb 18 22:33 passwd
-rw-r--r-- 1 root root 32818 May 13 15:01 perl-TimeDate-1.16-5.el5.noarch.rpm
-rw-r--r-- 1 root root 388632 May 13 15:01 resource-agents-1.0.4-1.1.el5.i386.rpm
drwxr-xr-x 7 root root 4096 Sep 19 2008 vmware-tools-distrib
drbd的安装:
解压安装所依赖的包:
[root@node1 ~]# mount /dev/cdrom /mnt/cdrom/
[root@node1 ~]# yum localinstall -y *.rpm –nogpgcheck
[root@node1 ~]# scp /root/*rpm node2:/root/
[root@node2 ~]# mount /dev/cdrom /mnt/cdrom/
[root@node2 ~]# yum localinstall -y *.rpm –nogpgcheck
在各主机上增加一个大小类型都相关的drbd 设备(sda4):
[root@node1 ~]# fdisk /dev/sda
[root@node1 ~]# partprobe /dev/sda
[root@node1 ~]# cat /proc/partitions
[root@node2 ~]# fdisk /dev/sda
[root@node2 ~]# partprobe /dev/sda
[root@node2 ~]# cat /proc/partitions
编辑drbd配置文件:
[root@node1 ~]# cp /usr/share/doc/drbd83-8.3.8/drbd.conf /etc/
[root@node1 ~]# cd /etc/drbd.d/
[root@node1 drbd.d]# cp global_common.conf global_common.conf.bak
[root@node1 drbd.d]# vim global_common.conf
global {
usage-count yes;
}
common {
protocol C;
handlers {
pri-lost-after-sb "/usr/lib/drbd/notify-pri-lost-after-sb.sh; /usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ; reboot -f";
local-io-error "/usr/lib/drbd/notify-io-error.sh; /usr/lib/drbd/notify-emergency-shutdown.sh; echo o >; /proc/sysrq-trigger ; halt -f";
}
startup {
wfc-timeout 120;
degr-wfc-timeout 120;
}
disk {
on-io-error detach;
}
net {
cram-hmac-alg "sha1";
shared-secret "mydrbdlab";
}
syncer {
rate 100M;
}
}
定义mysql 的资源:
[root@node1 drbd.d]# vim mysql.res
resource mysql{
on node1.a.com {
device /dev/drbd0;
disk /dev/sda4;
address 192.168.2.10:7789;
meta-disk internal;
}
on node2.a.com {
device /dev/drbd0;
disk /dev/sda4;
address 192.168.2.20:7789;
meta-disk internal;
}
}
将主机node1上的文件拷到node2上:
[root@node1 drbd.d]# scp -r /etc/drbd.* node2:/etc/
初始化定义的mysql 的资源并启动相应的服务:
[root@node1 drbd.d]# drbdadm create-md mysql
[root@node2 drbd.d]# drbdadm create-md mysql
[root@node1 ~]# service drbd start
将node1设为主节点:
[root@node1 ~]# drbdadm -- --overwrite-data-of-peer primary mysql
查看两个主机的角色:
[root@node1 ~]# drbd-overview
[root@node2 ~]# drbd-overview
格式化磁盘:
[root@node1 ~]# mkfs -t ext3 /dev/drbd0
创建挂载点并挂载:
[root@node1 ~]# mkdir /mysqldata
[root@node1 ~]# mount /dev/drbd0 /mysqldata/
[root@node1 ~]# cd /mysqldata/
在挂载磁盘上创建两个文件:
[root@node1 mysqldata]# touch f1 f2
[root@node1 mysqldata]# ll /mysqldata/
将node1和node2的主,副模式进行切换:
[root@node1 ~]# umount /mysqldata/
[root@node1 ~]# drbdadm secondary mysql
[root@node2 ~]# drbdadm primary mysql
node2上创建挂载点,并查看node1上信息是否同步过来:
[root@node2 ~]# mkdir /mysqldata
[root@node2 ~]# mount /dev/drbd0 /mysqldata/
[root@node2 ~]# ll /mysqldata/
[root@node2 ~]# cd /mysqldata/
node2上创建一个文件:
[root@node2 mysqldata]# touch f3
[root@node2 ~]# umount /mysqldata/
进行模式切换,查看node2上信息是否同步到node1上:
[root@node2 ~]# drbdadm secondary mysql
[root@node1 ~]# drbdadm primary mysql
[root@node1 ~]# mount /dev/drbd0 /mysqldata/
mysql的安装:
创建mysql组和账户:
[root@node1 ~]# groupadd -r mysql
[root@node1 ~]# useradd -g mysql -r mysql
[root@node1 ~]# mkdir /mysqldata/data
data 目录要用存放mysql 的数据,故改变其属主属组:
[root@node1 ~]# chown -R mysql.mysql /mysqldata/data/
[root@node1 ~]# tar zxvf mysql-5.5.15-linux2.6-i686.tar.gz -C /usr/local/
[root@node1 ~]# cd /usr/local/
创建mysql链接:
[root@node1 local]# ln -sv mysql-5.5.15-linux2.6-i686/ mysql
[root@node1 local]# cd mysql
[root@node1 mysql]# chown -R mysql.mysql .
初始化mysql 数据库:
[root@node1 mysql]# scripts/mysql_install_db --user=mysql --datadir=/mysqldata/data
[root@node1 mysql]# chown -R root .
为mysql 提供主配置文件:
[root@node1 mysql]# cp support-files/my-large.cnf /etc/my.cnf
[root@node1 mysql]# vim /etc/my.cnf
修改mysql启动服务:
[root@node1 mysql]# cp support-files/mysql.server /etc/rc.d/init.d/mysqld
[root@node1 mysql]# scp /etc/my.cnf node2:/etc/
[root@node1 mysql]# scp /etc/rc.d/init.d/mysqld node2:/etc/rc.d/init.d/
[root@node1 mysql]# chkconfig --add mysqld
确保开机不能自动启动,我们要用CRM 控制:
[root@node1 mysql]# chkconfig mysqld off
[root@node1 mysql]# service mysqld start
[root@node1 mysql]# service mysqld stop
[root@node1 mysql]# ls /mysqldata/data/
输出mysql 的man 手册至man 命令的查找路径:
[root@node1 mysql]# vim /etc/man.config
[root@node1 mysql]# ln -sv /usr/local/mysql/include /usr/include/mysql
输出mysql 的库文件给系统库查找路径:
[root@node1 mysql]# echo '/usr/local/mysql/lib/' >/etc/ld.so.conf.d/mysql.conf
让系统重新载入系统库:
[root@node1 mysql]# ldconfig
[root@node1 mysql]# vim /etc/profile
重新读取环境变量:
[root@node1 mysql]# . /etc/profile
[root@node1 mysql]# echo $PATH
node2上mysql的安装,和node1上大致相同:
[root@node1 mysql]# umount /mysqldata/
[root@node1 ~]# drbdadm secondary mysql
[root@node2 ~]# drbdadm primary mysql
[root@node2 ~]# groupadd -r mysql
[root@node2 ~]# useradd -g mysql -r mysql
[root@node2 ~]# mount /dev/drbd0 /mysqldata/
[root@node2 ~]# tar -zxvf mysql-5.5.15-linux2.6-i686.tar.gz -C /usr/local/
[root@node2 ~]# cd /usr/local/
[root@node2 local]# chown -R root:mysql .
[root@node2 local]# ln -sv mysql-5.5.15-linux2.6-i686/ mysql
[root@node2 local]# cd mysql
[root@node2 mysql]# chown -R root .
[root@node2 mysql]# chown -R mysql.mysql .
[root@node2 mysql]# scripts/mysql_install_db --user=mysql --datadir=/mysqldata/data
[root@node2 mysql]# service mysqld start
[root@node2 mysql]# service mysqld stop
[root@node2 mysql]# ls /mysqldata/data/
[root@node2 mysql]# umount /dev/drbd0
corosync的配置:
切换到主配置文件的目录:
[root@node1 ~]# cd /etc/corosync/
[root@node1 corosync]# cp corosync.conf.example corosync.conf
[root@node1 corosync]# vim corosync.conf
需要补充的一些东西:
创建cluster目录:
[root@node1 corosync]# mkdir /var/log/cluster
为了便面其他主机加入该集群,需要认证,生成一authkey:
[root@node1 corosync]# corosync-keygen
将node1 上的文件拷贝到node2 上面:
[root@node1 corosync]# scp -p authkey corosync.conf node2:/etc/corosync/
[root@node1 corosync]# ssh node2 'mkdir /var/log/cluster'
启动 corosync的服务:
[root@node1 corosync]# service corosync start
[root@node2 ~]# service corosync start
验证corosync 引擎是否正常启动:
[root@node1 corosync]# grep -i -e "corosync cluster engine" -e "configuration file" /var/log/messages
查看初始化成员节点通知是否发出:
[root@node1 corosync]# grep -i totem /var/log/messages
检查过程中是否有错误产生:
[root@node1 corosync]# grep -i error: /var/log/messages |grep -v unpack_resources
检查pacemaker 时候已经启动了
[root@node1 corosync]# grep -i pcmk_startup /var/log/messages
node2上面做同样的检测:
[root@node2 ~]# grep -i -e "corosync cluster engine" -e "configuration file" /var/log/messages
[root@node2 ~]# grep -i totem /var/log/messages
[root@node2 ~]# grep -i error: /var/log/messages |grep -v unpack_resources
[root@node2 ~]# grep -i pcmk_startup /var/log/messages
在node1 上查看群集的状态:
[root@node1 corosync]# crm status
进行测试:
禁用stonith:
[root@node1 ~]# crm configure property stonith-enabled=false
对于双节点的集群来说,我们要配置此选项来忽略quorum,即这时候票数不起作用,一个
节点也能正常运行:
[root@node1 ~]# crm configure property no-quorum-policy=ignore
为资源指定默认黏性值:
[root@node1 ~]# crm configure rsc_defaults resource-stickiness=100
查看当前集群的配置信息:
[root@node1 ~]# crm configure show
将已经配置好的DRBD 设备/dev/drbd0 定义为集群服务;
[root@node1 ~]# service drbd stop
[root@node1 ~]# chkconfig drbd off
[root@node1 ~]# ssh node2 "service drbd stop"
[root@node1 ~]# ssh node2 "chkconfig drbd off"
提供drbd 的RA,并查看:
[root@node1 ~]# crm ra classes
[root@node1 ~]# crm ra info ocf:linbit:drbd
[root@node1 ~]# crm
crm(live)# configure
crm(live)configure# primitive mysqldrbd ocf:heartbeat:drbd params drbd_resource="mysql" op monitor role="Master" interval="30s" op monitor role="Slave" interval="31s" op start timeout="240s" op stop timeout="100s"
crm(live)configure# ms MS_mysqldrbd mysqldrbd meta master-max=1 master-node-max=1 clone-max=2 clone-node-max=1 notify="true"
crm(live)configure# show mysqldrbd
crm(live)configure# show MS_mysqldrbd
crm(live)configure# verify
crm(live)configure# commit
crm(live)configure# exit
[root@node1 ~]# crm status
验正当前主机是否已经成为mysql 资源的Primary 节点:
[root@node1 ~]# drbdadm role mysql
[root@node1 ~]# crm
crm(live)# configure
crm(live)configure# primitive MysqlFS ocf:heartbeat:Filesystem params device="/dev/drbd0" directory="/mydata" fstype="ext3" op start timeout=60s op stop timeout=60s
crm(live)configure# commit
crm(live)configure# exit
开始测试
mysql 资源的定义(node1 上操作)
先为mysql 集群创建一个IP 地址资源,通过集群提供服务时使用,这个地址就是客户端访
问mysql 服务器使用的ip 地址;
[root@node1 ~]# crm configure primitive myip ocf:heartbeat:IPaddr params ip=192.168.2.100
配置mysqld 服务为高可用资源:
[root@node1 ~]# crm configure primitive mysqlserver lsb:mysqld
[root@node1 ~]# crm status
============
Last updated: Sat May 12 15:40:57 2012
Stack: openais
Current DC: node1.a.com - partition with quorum
Version: 1.1.5-1.1.el5-01e86afaaa6d4a8c4836f68df80ababd6ca3902f
2 Nodes configured, 2 expected votes
4 Resources configured.
============
Online: [ node1.a.com node2.a.com ]
Master/Slave Set: MS_mysqldrbd [mysqldrbd]
Masters: [ node1.a.com ]
Slaves: [ node2.a.com ]
MysqlFS (ocf::heartbeat:Filesystem): Started node1.a.com
myip (ocf::heartbeat:IPaddr): Started node2.a.com
定义如下的约束:
[root@node1 ~]# crm
crm(live)# configure
crm(live)configure# colocation MysqlFS_with_mysqldrbd inf: MysqlFS MS_mysqldrbd:Master myip mysqlserver
crm(live)configure# order MysqlFS_after_mysqldrbd inf: MS_mysqldrbd:promote MysqlFS:start
crm(live)configure# order myip_after_MysqlFS mandatory: MysqlFS myip
crm(live)configure# order mysqlserver_after_myip mandatory: myip mysqlserver
验证是否有错:
crm(live)configure# verify
crm(live)configure# commit
crm(live)configure# exit
查看配置信息:
[root@node1 ~]# crm configure show
node node1.a.com
node node2.a.com
primitive MysqlFS ocf:heartbeat:Filesystem \
params device="/dev/drbd0" directory="/mydata" fstype="ext3" \
op start interval="0" timeout="60s" \
op stop interval="0" timeout="60s"
primitive myip ocf:heartbeat:IPaddr \
params ip="192.168.2.100"
primitive mysqldrbd ocf:heartbeat:drbd \
params drbd_resource="mysql" \
op monitor interval="30s" role="Master" \
op monitor interval="31s" role="Slave" \
op start interval="0" timeout="240s" \
op stop interval="0" timeout="100s"
primitive mysqlserver lsb:mysqld
ms MS_mysqldrbd mysqldrbd \
meta master-max="1" master-node-max="1" clone-max="2" clone-node-max="1" notify="true"
colocation MysqlFS_with_mysqldrbd inf: MysqlFS MS_mysqldrbd:Master myip mysqlserver
order MysqlFS_after_mysqldrbd inf: MS_mysqldrbd:promote MysqlFS:start
order myip_after_MysqlFS inf: MysqlFS myip
order mysqlserver_after_myip inf: myip mysqlserver
property $id="cib-bootstrap-options" \
dc-version="1.1.5-1.1.el5-01e86afaaa6d4a8c4836f68df80ababd6ca3902f" \
cluster-infrastructure="openais" \
expected-quorum-votes="2" \
stonith-enabled="false" \
no-quorum-policy="ignore"
rsc_defaults $id="rsc-options" \
resource-stickiness="100"
查看运行状态:
[root@node1 ~]# crm status
·
============
Last updated: Sat May 12 15:49:26 2012
Stack: openais
Current DC: node1.a.com - partition with quorum
Version: 1.1.5-1.1.el5-01e86afaaa6d4a8c4836f68df80ababd6ca3902f
2 Nodes configured, 2 expected votes
4 Resources configured.
============
Online: [ node1.a.com node2.a.com ]
Master/Slave Set: MS_mysqldrbd [mysqldrbd]
Masters: [ node1.a.com ]
Slaves: [ node2.a.com ]
MysqlFS (ocf::heartbeat:Filesystem): Started node1.a.com
myip (ocf::heartbeat:IPaddr): Started node1.a.com
mysqlserver (lsb:mysqld): Started node1.a.com
可见,服务现在在node1 上正常运行:
在node1 上的操作,查看mysql 的运行状态:
[root@node1 ~]# service mysqld status
MySQL running (6578) [ OK ]
查看是否自动挂载
[root@node1 ~]# mount
/dev/hdc on /mnt/cdrom type iso9660 (ro)
/dev/drbd0 on /mysqldata type ext3 (rw)
查看目录
[root@node1 ~]# ls /mysqldata/
data f1 f2 lost+found
查看vip 的状态
[root@node1 ~]# ifconfig
----------------------- Page 21-----------------------
eth0 Link encap:Ethernet HWaddr 00:0C:29:1D:88:6F
inet addr:192.168.2.10 Bcast:192.168.2.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe1d:886f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:117137 errors:0 dropped:0 overruns:0 frame:0
TX packets:813068 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:12124664 (11.5 MiB) TX bytes:1147189896 (1.0 GiB)
Interrupt:67 Base address:0x2000
eth0:0 Link encap:Ethernet HWaddr 00:0C:29:1D:88:6F
inet addr:192.168.2.100 Bcast:192.168.2.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:67 Base address:0x2000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:6067 errors:0 dropped:0 overruns:0 frame:0
TX packets:6067 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:8873981 (8.4 MiB) TX bytes:8873981 (8.4 MiB)
继续测试:
在node1 上操作,让node1 下线:
[root@node1 ~]# crm node standby
查看集群运行的状态:
[root@node1 ~]# crm status
============
Last updated: Sat May 12 15:56:11 2012
Stack: openais
Current DC: node1.a.com - partition with quorum
Version: 1.1.5-1.1.el5-01e86afaaa6d4a8c4836f68df80ababd6ca3902f
2 Nodes configured, 2 expected votes
4 Resources configured.
============
Node node1.a.com: standby
Online: [ node2.a.com ]
Master/Slave Set: MS_mysqldrbd [mysqldrbd]
Masters: [ node2.a.com ]
Stopped: [ mysqldrbd:0 ]
MysqlFS (ocf::heartbeat:Filesystem): Started node2.a.com
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myip (ocf::heartbeat:IPaddr): Started node2.a.com
mysqlserver (lsb:mysqld): Started node2.a.com
可见我们的资源已经都切换到了node2 上:
查看node2 的运行状态:
[root@node2 ~]# service mysqld status
MySQL running (7805) [ OK ]
查看目录
[root@node2 ~]# ls /mysqldata/
data f1 f2 f3 lost+found
ok,现在一切正常,我们可以验证mysql 服务是否能被正常访问:
我们定义的是通过VIP:192.168.2.100 来访问mysql 服务,现在node2 上建立一个可以让某个
网段主机能访问的账户(这个内容会同步drbd 设备同步到node1 上):
[root@node2 ~]# mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.5.15-log MySQL Community Server (GPL)
Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>; grant all on *.* to test@'192.168.%.%' identified by '123456';
Query OK, 0 rows affected (0.01 sec)
mysql>; flush privileges;
Query OK, 0 rows affected (0.06 sec)
mysql>; exit
Bye
然后我们通过另一台主机进行访问:
[root@node1 ~]# mysql -u test -h 192.168.2.100
[root@node1 ~]# mysql -u test -h 192.168.2.100
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.5.15-log MySQL Community Server (GPL)
Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
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mysql>;
这样我们的mysql 的高可用性的群集就实现成功啦。