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corosync+drbd+mysql实现的高可用_MySQL
要求:
一、能够在同一网段内直接通信
二、节点名称,要和uname的结果一样,并保证可以根据节点名称解析到节点的IP地址,配置本地/etc/hosts
三、SSH互信通信
四、保证时间同步
环境准备配置:
test1,192.168.10.55配置
1、配置IP地址- [root@test1~]#vim /etc/sysconfig/network-scripts/ifcfg-eth0
复制代码 2、配置主机名- [root@test1~]#uname -n
- [root@test1~]#hostname master1.local #临时生效
- [root@test1~]#vim /etc/sysconfig/network #永久生效
复制代码 3、配置主机名解析- [root@test1~]#vim /etc/hosts
- 添加:
- 192.168.10.55 master1.local
- 192.168.10.56 master2.local
复制代码 3.2、测试主机名通信- [root@test1~]#ping master1.local
- [root@test1~]#ping master2.local
复制代码 4、配置SSH互信认证- [root@test1~]#ssh-keygen -t rsa -P''
- [root@test1~]#ssh-copy-id -i .ssh/id_rsa.pub root@192.168.10.55
复制代码 5、使用ntp同步时间
在crontab中加入每5分钟执行一次ntpdate命令,用来保证服务器时间是同步的- [root@test1~]#crontab -e
- */5 * * * * /sbin/ntpdate 192.168.10.1 &> /dev/null
复制代码 test2,192.168.10.56配置
1、配置IP地址- [root@test2~]#vim /etc/sysconfig/network-scripts/ifcfg-eth0
复制代码 2、配置主机名- [root@test2~]#uname -n
- [root@test2~]#hostname test2.local #临时生效
- [root@test2~]#vim /etc/sysconfig/network #永久生效
复制代码 3、配置主机名解析- [root@test2~]#vim /etc/hosts
- 添加:
- 192.168.10.55 test1.localtest1
- 192.168.10.56 test2.localtest2
复制代码 3.2、测试主机名通信- [root@test2~]#ping test1.local
- [root@test2~]#ping test1
复制代码 4、配置SSH互信认证- [root@test2~]#ssh-keygen -t rsa -P ''
复制代码 5、使用ntp同步时间
在crontab中加入每5分钟执行一次ntpdate命令,用来保证服务器时间是同步的- [root@test2~]#crontab -e
- */5 * * * * /sbin/ntpdate 192.168.10.1 &> /dev/null
复制代码 安装配置heartbeat
CentOS直接yum安装报错,提示找不到可用的软件包
解决办法:- [root@test1src]#wget http://mirrors.sohu.com/fedora-epel/6/i386/epel-release-6-8.noarch.rpm
- [root@test1src]#rpm -ivh epel-release-6-8.noarch.rpm
复制代码 6.1、安装heartbeat:- [root@test1src]#yum install heartbeat
复制代码 6.2、copy配置文件:- [root@test1src]#cp /usr/share/doc/heartbeat-3.0.4/{ha.cf,authkeys,haresources} /etc/ha.d/
复制代码 6.3、配置认证文件:- [root@test1src]#dd if=/dev/random count=1 bs=512 | md5sum #生成随机数
- [root@test1src]#vim /etc/ha.d/authkeys
- auth1
- 1 md5 d0f70c79eeca5293902aiamheartbeat
- [root@test1src]#chmod 600 authkeys
复制代码 test2节点的heartbeat安装和test1一样,此处略过。
6.4、heartbeat主配置文件参数:- [root@test2~]#vim /etc/ha.d/ha.cf
- #debugfile /var/log/ha-debug #排错日志
- logfile #日志位置
- keepalive 2 #多长时间发送一次心跳检测,默认2秒,可以使用ms
- deadtime 30 #多长时间检测不到主机就认为挂掉
- warntime 10 #如果没有收到心跳信息,那么在等待多长时间就认为对方挂掉
- initdead 120 #第一个节点起来后,等待其他节点的时间
- baud 19200 #串行线缆的发送速率是多少
- auto_failback on #故障恢复后是否转移回来
- ping 10.10.10.254 #pingnode,万一节点主机不通,要ping哪个主机
- ping_group group 110.10.10.254 10.10.10.253 #pingnodegroup,只要组内有一台主机能ping通就可以
- respawn hacluster /usr/lib/heartbeat/ipfail #当一个heartbeat服务停止了,会重启对端的heartbeat服务
- deadping 30 #pingnodes多长时间ping不通,就真的故障了
- #serial serialportname... #串行设备是什么
- serial /dev/ttyS0 #Linux
- serial /dev/cuaa0 #FreeBSD
- serial /dev/cuad0 #FreeBSD6.x
- serial /dev/cua/a #Solaris
- #What interface sto broadcast heartbeats over? #如果使用以太网,定义使用单播、组播还是广播发送心跳信息
- bcast eth0 #广播
- mcast eth0 225.0.0.169410#组播
- ucast eth0 192.168.1.2 #单播,只有两个节点的时候才用单播
- #定义stonith主机
- stonith_host * baytech 10.0.0.3 mylogin mysecret password
- stonith_host ken3 rps 10 /dev/ttyS1 kathy 0
- stonith_host kathy rps 10 /dev/ttyS1 ken 30
- #Tell what machines are in the cluster#告诉集群中有多少个节点,
- 每一个节点用node和主机名写一行,主机名要和uname-n保持一致
- nod ken3
- node kathy
- 一般只要定义心跳信息的发送方式、和集群中的节点就行。
- bcast eth0
- node test1.local
- node test2.local
复制代码 6.5、定义haresources资源配置文件:- [root@test2~]#vim /etc/ha.d/haresources
- #node1 10.0.0.170 Filesystem::/dev/sda1::/data1::ext2 #默认用作主节点的主机名,要跟uname-n一样。VIP是多少。
- 自动挂载哪个设备,到哪个目录下,文件类型是什么。资源类型的参数要用双冒号隔开
- #just.linux-ha.org 135.9.216.110 http #和上面一样,这里使用的资源是在/etc/rc.d/init.d/下面的,
- 默认先到/etc/ha.d/resource.d/目录下找资源,找不到在到/etc/rc.d/init.d/目录找
- master1.localIPaddr::192.168.10.2/24 eth0 mysqld
- master1.localIPaddr::192.168.10.2/24/eth0drbddisk::dataFilesystem::/dev/drbd1::/data::ext3mysqld
- #使用IPaddr脚本来配置VIP
复制代码 6.6、拷贝master1.local的配置文件到master2.local上- [root@test1~]#scp -p ha.cf haresources authkeys master2.local:/etc/ha.d/
复制代码 7、启动heartbeat- [root@test1~]#service heartbeat start
复制代码 7.1、查看heartbeat启动日志- [root@test1~]#tail -f /var/log/messages
- Feb1615:12:45test-1heartbeat:[16056]:info:Configurationvalidated.Startingheartbeat3.0.4
- Feb1615:12:45test-1heartbeat:[16057]:info:heartbeat:version3.0.4
- Feb1615:12:45test-1heartbeat:[16057]:info:Heartbeatgeneration:1455603909
- Feb1615:12:45test-1heartbeat:[16057]:info:glib:UDPBroadcastheartbeatstartedonport694(694)interfaceeth0
- Feb1615:12:45test-1heartbeat:[16057]:info:glib:UDPBroadcastheartbeatclosedonport694interfaceeth0-Status:1
- Feb1615:12:45test-1heartbeat:[16057]:info:glib:pingheartbeatstarted.
- Feb1615:12:45test-1heartbeat:[16057]:info:G_main_add_TriggerHandler:Addedsignalmanualhandler
- Feb1615:12:45test-1heartbeat:[16057]:info:G_main_add_TriggerHandler:Addedsignalmanualhandler
- Feb1615:12:45test-1heartbeat:[16057]:info:G_main_add_SignalHandler:Addedsignalhandlerforsignal17
- Feb1615:12:45test-1heartbeat:[16057]:info:Localstatusnowsetto:'up'
- Feb1615:12:45test-1heartbeat:[16057]:info:Link192.168.10.1:192.168.10.1up.
- Feb1615:12:45test-1heartbeat:[16057]:info:Statusupdatefornode192.168.10.1:statusping
- Feb1615:12:45test-1heartbeat:[16057]:info:Linktest1.local:eth0up.
- Feb1615:12:51test-1heartbeat:[16057]:info:Linktest2.local:eth0up.
- Feb1615:12:51test-1heartbeat:[16057]:info:Statusupdatefornodetest2.local:statusup
- Feb1615:12:51test-1harc(default)[16068]:info:Running/etc/ha.d//rc.d/statusstatus
- Feb1615:12:52test-1heartbeat:[16057]:WARN:1lostpacket(s)for[test2.local][3:5]
- Feb1615:12:52test-1heartbeat:[16057]:info:Nopktsmissingfromtest2.local!
- Feb1615:12:52test-1heartbeat:[16057]:info:Comm_now_up():updatingstatustoactive
- Feb1615:12:52test-1heartbeat:[16057]:info:Localstatusnowsetto:'active'
- Feb1615:12:52test-1heartbeat:[16057]:info:Statusupdatefornodetest2.local:statusactive
- Feb1615:12:52test-1harc(default)[16086]:info:Running/etc/ha.d//rc.d/statusstatus
- Feb1615:13:02test-1heartbeat:[16057]:info:localresourcetransitioncompleted.
- Feb1615:13:02test-1heartbeat:[16057]:info:Initialresourceacquisitioncomplete(T_RESOURCES(us))
- Feb1615:13:02test-1heartbeat:[16057]:info:remoteresourcetransitioncompleted.
- Feb1615:13:02test-1/usr/lib/ocf/resource.d//heartbeat/IPaddr(IPaddr_192.168.10.2)[16138]:INFO:Resourceisstopped
- Feb1615:13:02test-1heartbeat:[16102]:info:LocalResourceacquisitioncompleted.
- Feb1615:13:02test-1harc(default)[16219]:info:Running/etc/ha.d//rc.d/ip-request-respip-request-resp
- Feb1615:13:02test-1ip-request-resp(default)[16219]:receivedip-request-respIPaddr::192.168.10.2/24/eth0OKyes
- Feb1615:13:02test-1ResourceManager(default)[16238]:info:Acquiringresourcegroup:test1.localIPaddr::192.168.10.2/24/eth0mysqld
- Feb1615:13:02test-1/usr/lib/ocf/resource.d//heartbeat/IPaddr(IPaddr_192.168.10.2)[16264]:INFO:Resourceisstopped
- Feb1615:13:03test-1ResourceManager(default)[16238]:info:Running/etc/ha.d/resource.d/IPaddr192.168.10.2/24/eth0start
- Feb1615:13:03test-1IPaddr(IPaddr_192.168.10.2)[16386]:INFO:Addinginetaddress192.168.10.2/24withbroadcastaddress192.168.10.255todeviceeth0
- Feb1615:13:03test-1IPaddr(IPaddr_192.168.10.2)[16386]:INFO:Bringingdeviceeth0up
- Feb1615:13:03test-1IPaddr(IPaddr_192.168.10.2)[16386]:INFO:/usr/libexec/heartbeat/send_arp-i200-r5-p/var/run/resource-agents/send_arp-192.168.10.2eth0192.168.10.2autonot_usednot_used
- Feb1615:13:03test-1/usr/lib/ocf/resource.d//heartbeat/IPaddr(IPaddr_192.168.10.2)[16360]:INFO:Success
- Feb1615:13:03test-1ResourceManager(default)[16238]:info:Running/etc/init.d/mysqldstart
- Feb1615:13:04test-1ntpd[1605]:Listennormallyon15eth0192.168.10.2UDP123
复制代码 首页> mysql教程> 正文
corosync+drbd+mysql实现的高可用_MySQL
作者: PHP中文网|标签:MYSQL corosync+drbd+mysql|2016-5-27 13:45
corosync+drbd+mysql实现的高可用_MySQL
要求:
一、能够在同一网段内直接通信
二、节点名称,要和uname的结果一样,并保证可以根据节点名称解析到节点的IP地址,配置本地/etc/hosts
三、SSH互信通信
四、保证时间同步
环境准备配置:
test1,192.168.10.55配置
1、配置IP地址
- [root@test1~]#vim /etc/sysconfig/network-scripts/ifcfg-eth0
复制代码
2、配置主机名
- [root@test1~]#uname -n
- [root@test1~]#hostname master1.local #临时生效
- [root@test1~]#vim /etc/sysconfig/network #永久生效
复制代码
3、配置主机名解析
- [root@test1~]#vim /etc/hosts
- 添加:
- 192.168.10.55 master1.local
- 192.168.10.56 master2.local
复制代码
3.2、测试主机名通信
- [root@test1~]#ping master1.local
- [root@test1~]#ping master2.local
复制代码
4、配置SSH互信认证
- [root@test1~]#ssh-keygen -t rsa -P ''
- [root@test1~]#ssh-copy-id -i .ssh/id_rsa.pub root@192.168.10.55
复制代码
5、使用ntp同步时间
- 在crontab中加入每5分钟执行一次ntpdate命令,用来保证服务器时间是同步的
- [root@test1~]#crontab -e
- */5 * * * * /sbin/ntpdate 192.168.10.1 &> /dev/null
- test2,192.168.10.56配置
复制代码
1、配置IP地址
- [root@test2~]#vim /etc/sysconfig/network-scripts/ifcfg-eth0
复制代码
2、配置主机名
- [root@test2~]#uname -n
- [root@test2~]#hostname test2.local #临时生效
- [root@test2~]#vim /etc/sysconfig/network #永久生效
复制代码
3、配置主机名解析
- [root@test2~]#vim /etc/hosts
- 添加:
- 192.168.10.55 test1.localtest1
- 192.168.10.56 test2.localtest2
复制代码
3.2、测试主机名通信
- [root@test2~]#ping test1.local
- [root@test2~]#ping test1
复制代码
4、配置SSH互信认证
- [root@test2~]#ssh-keygen -t rsa -P ''
- [root@test2~]#ssh-copy-id -i .ssh/id_rsa.pub root@192.168.10.56
复制代码
5、使用ntp同步时间
- 在crontab中加入每5分钟执行一次ntpdate命令,用来保证服务器时间是同步的
- [root@test2~]#crontab -e
- */5 * * * * /sbin/ntpdate 192.168.10.1 &> /dev/null
- 安装配置heartbeat
- CentOS直接yum安装报错,提示找不到可用的软件包
- 解决办法:
- [root@test1src]#wgethttp://mirrors.sohu.com/fedora-epel/6/i386/epel-release-6-8.noarch.rpm
- [root@test1src]#rpm-ivhepel-release-6-8.noarch.rpm
复制代码
6.1、安装heartbeat:
- [root@test1src]#yum install heartbeat
复制代码
6.2、copy配置文件:
- [root@test1src]#cp /usr/share/doc/heartbeat-3.0.4/{ha.cf,authkeys,haresources} /etc/ha.d/
复制代码
6.3、配置认证文件:
- [root@test1src]#dd if=/dev/random count=1 bs=512 | md5sum #生成随机数
- [root@test1src]#vim /etc/ha.d/authkeys
- auth 1
- 1 md5 d0f70c79eeca5293902aiamheartbeat
- [root@test1src]#chmod 600 authkeys
- test2节点的heartbeat安装和test1一样,此处略过。
复制代码
6.4、heartbeat主配置文件参数:
- [root@test2~]#vim /etc/ha.d/ha.cf
- #debugfile/var/log/ha-debug#排错日志
- logfile#日志位置
- keepalive2#多长时间发送一次心跳检测,默认2秒,可以使用ms
- deadtime30#多长时间检测不到主机就认为挂掉
- warntime10#如果没有收到心跳信息,那么在等待多长时间就认为对方挂掉
- initdead120#第一个节点起来后,等待其他节点的时间
- baud19200#串行线缆的发送速率是多少
- auto_failbackon#故障恢复后是否转移回来
- ping10.10.10.254#pingnode,万一节点主机不通,要ping哪个主机
- ping_groupgroup110.10.10.25410.10.10.253#pingnodegroup,只要组内有一台主机能ping通就可以
- respawnhacluster/usr/lib/heartbeat/ipfail#当一个heartbeat服务停止了,会重启对端的heartbeat服务
- deadping30#pingnodes多长时间ping不通,就真的故障了
- #serialserialportname...#串行设备是什么
- serial/dev/ttyS0#Linux
- serial/dev/cuaa0#FreeBSD
- serial/dev/cuad0#FreeBSD6.x
- serial/dev/cua/a#Solaris
- #Whatinterfacestobroadcastheartbeatsover?#如果使用以太网,定义使用单播、组播还是广播发送心跳信息
- bcasteth0#广播
- mcasteth0225.0.0.169410#组播
- ucasteth0192.168.1.2#单播,只有两个节点的时候才用单播
- #定义stonith主机
- stonith_host*baytech10.0.0.3myloginmysecretpassword
- stonith_hostken3rps10/dev/ttyS1kathy0
- stonith_hostkathyrps10/dev/ttyS1ken30
- #Tellwhatmachinesareinthecluster#告诉集群中有多少个节点,
- 每一个节点用node和主机名写一行,主机名要和uname-n保持一致
- nodeken3
- nodekathy
- 一般只要定义心跳信息的发送方式、和集群中的节点就行。
- bcasteth0
- nodetest1.local
- nodetest2.local
复制代码
6.5、定义haresources资源配置文件:
- [root@test2~]#vim /etc/ha.d/haresources
- #node110.0.0.170Filesystem::/dev/sda1::/data1::ext2#默认用作主节点的主机名,要跟uname-n一样。VIP是多少。
- 自动挂载哪个设备,到哪个目录下,文件类型是什么。资源类型的参数要用双冒号隔开
- #just.linux-ha.org135.9.216.110http#和上面一样,这里使用的资源是在/etc/rc.d/init.d/下面的,
- 默认先到/etc/ha.d/resource.d/目录下找资源,找不到在到/etc/rc.d/init.d/目录找
- master1.local IPaddr::192.168.10.2/24/eth0 mysqld
- master1.localIPaddr::192.168.10.2/24/eth0 drbd disk::dataFilesystem::/dev/drbd1::/data::ext3mysqld
- #使用IPaddr脚本来配置VIP
复制代码
6.6、拷贝master1.local的配置文件到master2.local上
- [root@test1~]#scp -p ha.cf haresources authkeys master2.local:/etc/ha.d/
复制代码
7、启动heartbeat
- [root@test1~]#service heartbeat start
- [root@test1~]#ssh master2.loca 'service heartbeat start' #一定要在test1上通过ssh的方式启动test2节点的heartbeat
复制代码
7.1、查看heartbeat启动日志
- [root@test1~]#tail -f /var/log/messages
- Feb1615:12:45test-1heartbeat:[16056]:info:Configurationvalidated.Startingheartbeat3.0.4
- Feb1615:12:45test-1heartbeat:[16057]:info:heartbeat:version3.0.4
- Feb1615:12:45test-1heartbeat:[16057]:info:Heartbeatgeneration:1455603909
- Feb1615:12:45test-1heartbeat:[16057]:info:glib:UDPBroadcastheartbeatstartedonport694(694)interfaceeth0
- Feb1615:12:45test-1heartbeat:[16057]:info:glib:UDPBroadcastheartbeatclosedonport694interfaceeth0-Status:1
- Feb1615:12:45test-1heartbeat:[16057]:info:glib:pingheartbeatstarted.
- Feb1615:12:45test-1heartbeat:[16057]:info:G_main_add_TriggerHandler:Addedsignalmanualhandler
- Feb1615:12:45test-1heartbeat:[16057]:info:G_main_add_TriggerHandler:Addedsignalmanualhandler
- Feb1615:12:45test-1heartbeat:[16057]:info:G_main_add_SignalHandler:Addedsignalhandlerforsignal17
- Feb1615:12:45test-1heartbeat:[16057]:info:Localstatusnowsetto:'up'
- Feb1615:12:45test-1heartbeat:[16057]:info:Link192.168.10.1:192.168.10.1up.
- Feb1615:12:45test-1heartbeat:[16057]:info:Statusupdatefornode192.168.10.1:statusping
- Feb1615:12:45test-1heartbeat:[16057]:info:Linktest1.local:eth0up.
- Feb1615:12:51test-1heartbeat:[16057]:info:Linktest2.local:eth0up.
- Feb1615:12:51test-1heartbeat:[16057]:info:Statusupdatefornodetest2.local:statusup
- Feb1615:12:51test-1harc(default)[16068]:info:Running/etc/ha.d//rc.d/statusstatus
- Feb1615:12:52test-1heartbeat:[16057]:WARN:1lostpacket(s)for[test2.local][3:5]
- Feb1615:12:52test-1heartbeat:[16057]:info:Nopktsmissingfromtest2.local!
- Feb1615:12:52test-1heartbeat:[16057]:info:Comm_now_up():updatingstatustoactive
- Feb1615:12:52test-1heartbeat:[16057]:info:Localstatusnowsetto:'active'
- Feb1615:12:52test-1heartbeat:[16057]:info:Statusupdatefornodetest2.local:statusactive
- Feb1615:12:52test-1harc(default)[16086]:info:Running/etc/ha.d//rc.d/statusstatus
- Feb1615:13:02test-1heartbeat:[16057]:info:localresourcetransitioncompleted.
- Feb1615:13:02test-1heartbeat:[16057]:info:Initialresourceacquisitioncomplete(T_RESOURCES(us))
- Feb1615:13:02test-1heartbeat:[16057]:info:remoteresourcetransitioncompleted.
- Feb1615:13:02test-1/usr/lib/ocf/resource.d//heartbeat/IPaddr(IPaddr_192.168.10.2)[16138]:INFO:Resourceisstopped
- Feb1615:13:02test-1heartbeat:[16102]:info:LocalResourceacquisitioncompleted.
- Feb1615:13:02test-1harc(default)[16219]:info:Running/etc/ha.d//rc.d/ip-request-respip-request-resp
- Feb1615:13:02test-1ip-request-resp(default)[16219]:receivedip-request-respIPaddr::192.168.10.2/24/eth0OKyes
- Feb1615:13:02test-1ResourceManager(default)[16238]:info:Acquiringresourcegroup:test1.localIPaddr::192.168.10.2/24/eth0mysqld
- Feb1615:13:02test-1/usr/lib/ocf/resource.d//heartbeat/IPaddr(IPaddr_192.168.10.2)[16264]:INFO:Resourceisstopped
- Feb1615:13:03test-1ResourceManager(default)[16238]:info:Running/etc/ha.d/resource.d/IPaddr192.168.10.2/24/eth0start
- Feb1615:13:03test-1IPaddr(IPaddr_192.168.10.2)[16386]:INFO:Addinginetaddress192.168.10.2/24withbroadcastaddress192.168.10.255todeviceeth0
- Feb1615:13:03test-1IPaddr(IPaddr_192.168.10.2)[16386]:INFO:Bringingdeviceeth0up
- Feb1615:13:03test-1IPaddr(IPaddr_192.168.10.2)[16386]:INFO:/usr/libexec/heartbeat/send_arp-i200-r5-p/var/run/resource-agents/send_arp-192.168.10.2eth0192.168.10.2autonot_usednot_used
- Feb1615:13:03test-1/usr/lib/ocf/resource.d//heartbeat/IPaddr(IPaddr_192.168.10.2)[16360]:INFO:Success
- Feb1615:13:03test-1ResourceManager(default)[16238]:info:Running/etc/init.d/mysqldstart
- Feb1615:13:04test-1ntpd[1605]:Listennormallyon15eth0192.168.10.2UDP123
复制代码
说明:
1、Link test1.local:eth0 up、Link test2.local:eth0 up #两个节点连接成功并为UP状态。
2、Link 192.168.10.1:192.168.10.1 up #ping节点的IP也已经启动
3、info: Running /etc/init.d/mysqld start #mysql启动成功
4、Listen normally on 15 eth0 192.168.10.2 UDP 123 #VIP启动成功
7.2、查看heartbeat的VIP- [root@test1ha.d]#ipadd | grep "10.2"
- inet 192.168.10.55/24 brd 192.168.10.255 scope global eth0
- inet 192.168.10.2/24 brd 192.168.10.255 scope global secondary eth0
复制代码- [root@test-2ha.d]#ipadd | grep "10.2"
- inet 192.168.10.56/24 brd 192.168.10.255 scope global eth0
复制代码 注:可以看到现在VIP是在master1.local主机上。而master2.local上没有VIP
8、测试效果
8.1、正常情况下连接mysql- [root@test3ha.d]#mysql -uroot -h'192.168.10.2' -p
- Enterpassword:
- WelcometotheMySQLmonitor.Commandsendwith;or\g.
- YourMySQLconnectionidis2
- Serverversion:5.5.44Sourcedistribution
- Copyright(c)2000,2013,Oracleand/oritsaffiliates.Allrightsreserved.
- OracleisaregisteredtrademarkofOracleCorporationand/orits
- affiliates.Othernamesmaybetrademarksoftheirrespective
- owners.
- Type'help;'or'\h'forhelp.Type'\c'toclearthecurrentinputstatement.
- mysql>showvariableslike'server_id';
- +---------------+-------+
- |Variable_name|Value|
- +---------------+-------+
- |server_id|1|
- +---------------+-------+
- 1rowinset(0.00sec)
- mysql>
复制代码 8.2、关闭master1.local上的heartbeat- [root@test1ha.d]#service heartbeat stop
- StoppingHigh-Availabilityservices:Done.
- [root@test1ha.d]#ipadd |grep "192.168.10.2"
- inet 192.168.10.55/24 brd 192.168.10.255 scope global eth0
- [root@test2ha.d]#ipadd | grep"192.168.10.2"
- inet 192.168.10.56/24 brd 192.168.10.255 scope global eth0
- inet 192.168.10.2/24 brd 192.168.10.255 scope global secondary eth0
复制代码 注:这个时候VIP已经漂移到了master2.local主机上,我们在来看看连接mysql的server_id- [root@test2ha.d]#mysql -uroot -h'192.168.10.2' -p
- Enterpassword:
- WelcometotheMySQLmonitor.Commandsendwith;or\g.
- YourMySQLconnectionidis2
- Serverversion:5.5.44Sourcedistribution
- Copyright(c)2000,2013,Oracleand/oritsaffiliates.Allrightsreserved.
- OracleisaregisteredtrademarkofOracleCorporationand/orits
- affiliates.Othernamesmaybetrademarksoftheirrespective
- owners.
- Type'help;'or'\h'forhelp.Type'\c'toclearthecurrentinputstatement.
- mysql>showvariableslike'server_id';
- +---------------+-------+
- |Variable_name|Value|
- +---------------+-------+
- |server_id|2|
- +---------------+-------+
- 1rowinset(0.00sec)
- mysql>
复制代码 注:server_id已经从1变成了2,证明此时访问的是master2.local主机上的mysql服务
测试完毕。下面配置drbd让两台mysql服务器之间使用同一个文件系统,以实现mysql的写高可用。
9、配置DRBD
DRBD:(Distributed Replicated Block Device)分布式复制块设备,是linux内核中的一个模块。DRBD作为磁盘镜像来讲,它一定是主从架构的,它决不允许两个节点同时读写,仅允许一个节点能读写,从节点不能读写和挂载,
但是DRDB有双主的概念,主、从的角色可以切换。DRBD分别将位于两台主机上的硬盘或磁盘分区做成镜像设备,当我们客户端的程序向主节点发起存储请求的时候,这个数据会在底层以TCP/IP协议按位同布一份到备节点,
所以这能保证只要我们在主节点上存的数据,备节点上在按位一定有一模一样的一份数据。这是在两台主机上实现的,这意味着DRBD是工作在内核模块当中。不像RAID1的镜像是在同一台主机上实现的。
DRBD双主模型的实现:一个节点在数据访问的时候,它一定会将数据、元数据载入内存的,而且它对于某个文件内核中加锁的操作,另一个节点的内核是看不到的,那如果它能将它自己施加的锁通知给另一个节点的内核就可以了。
在这种情况下,我们就只能通过message layer(heartbeat、corosync都可)、pathmaker(把DRBD定义成资源),然后把这两个主机上对应的镜像格式化成集群文件系统(GFS2/OCFS2)。
这就是基于结合分布式文件锁管理器(DLM Distributed Lock Manager)以及集群文件系统所完成的双主模型。DRBD集群只允许有两个节点,要么双主,要么主从。
9.1、DRBD的三种工作模型
A、数据在本地DRBD存储完成后向应用程序返回存储成功的消息,异步模型。效率高,性能好。数据不安全
B、数据在本地DRBD存储完成后并且通过TCP/IP把所有数据发送到从DRBD中,才向本地的应用程序返回存储成功的消息,半同步模型。一般不用。
C、数据在本地DRBD存储完成后,通过TCP/IP把所有数据发送到从DRBD中,从DRBD存储完成后才向应用程序返回成功的消息,同步模型。效率低,性能若,但是数据安全可靠性大,用的最多。
9.2、DRBD的资源
1、资源名称,可以是任意的ascii码不包含空格的字符
2、DRBD设备,在双方节点上,此DRBD设备的设备文件,一般为/dev/drbdN,其主设备号相同都是147,此设备号用来标识不通的设备
3、磁盘配置,在双方节点上,各自提供的存储设备,可以是个分区,可以是任何类型的块设备,也可以是lvm
4、网络配置,双方数据同步时,所使用的网络属性
9.3、安装DRBD
drbd在2.6.33开始,才整合进内核的。
9.3.1、下载drbd- [root@test1~]#wget http://oss.linbit.com/drbd/8.4/drbd-8.4.3.tar.gz -O /usr/local/src/drbd-8.4.3.tar.gz
复制代码 9.3.2、安装drbd软件- [root@test1 ~]#cd /usr/local/src
- [root@test1 src]#tar -zxvf drbd-8.4.3.tar.gz
- [root@test1 src]#cd /usr/local/src/drbd-8.4.3
- [root@test1 drbd-8.4.3]#./configure --prefix=/usr/local/drbd --with-km
- [root@test1 drbd-8.4.3]#make
复制代码- [root@test1drbd-8.4.3]#make install
- [root@test1drbd-8.4.3]#mkdir -p /usr/local/drbd/var/run/drbd
- [root@test1drbd-8.4.3]#cp /usr/local/drbd/etc/rc.d/init.d/drbd /etc/rc.d/init.d/
复制代码 9.3.3、安装drbd模块- [root@test1 drbd-8.4.3]#cd drbd/
- [root@test1 drbd]#make clean
- [root@test1 drbd]#make
- [root@test1 drbd]#cp drbd.ko /lib/modules/`uname-r` /kernel/lib/
- [root@test1 drbd]#modprobe drbd
- [root@test1 drbd]#lsmod |grep drbd
复制代码 9.3.4、为drbd创建新分区- [root@test1 drbd]#fdisk /dev/sdb
- WARNING:DOS-compatiblemodeisdeprecated.It'sstronglyrecommendedto
- switchoffthemode(command'c')andchangedisplayunitsto
- sectors(command'u').
- Command(mforhelp):n
- Commandaction
- eextended
- pprimarypartition(1-4)
- p
- Partitionnumber(1-4):1
- Firstcylinder(1-1305,default1):
- Usingdefaultvalue1
- Lastcylinder,+cylindersor+size{K,M,G}(1-1305,default1305):+9G
- Command(mforhelp):w
- Thepartitiontablehasbeenaltered!
- Callingioctl()tore-readpartitiontable.
- AWRNING:Re-readingthepartitiontablefailedwitherror16:Deviceorresourcebusy.
- Thekernelstillusestheoldtable.
- Thenewtablewillbeusedatthenextreboot.
- Syncingdisks.
- [root@test1 drbd]#partprobe /dev/sdb
复制代码 test2节点的drbd安装和分区配置步骤略过,和test1上一样安装,test2节点的drbd配置文件保证和test1节点一样,使用scp传到test2节点即可
10、配置drbd
10.1、配置drbd的通用配置文件- [root@test1 drbd.d]#cd /usr/local/drbd/etc/drbd.d
- [root@test1 drbd.d]#vim global_common.conf
- global{#global是全局配置
- usage-countno;#官方用来统计有多少个客户使用drbd的
- #minor-countdialog-refreshdisable-ip-verification
- }
- common{#通用配置,用来配置所有资源那些相同属性的。为drbd提供默认属性的
- protocolC;#默认使用协议C,即同步模型。
- handlers{#处理器段,用来配置drbd的故障切换操作
- #TheseareEXAMPLEhandlersonly.
- #Theymayhavesevereimplications,
- #likehardresettingthenodeundercertaincircumstances.
- #Becarefulwhenchosingyourpoison.
- pri-on-incon-degr"/usr/lib/drbd/notify-pri-on-incon-degr.sh;/usr/lib/drbd/notify-emergency-reboot.sh;echob>/proc/sysrq-trigger;reboot-f";#
- pri-lost-after-sb"/usr/lib/drbd/notify-pri-lost-after-sb.sh;/usr/lib/drbd/notify-emergency-reboot.sh;echob>/proc/sysrq-trigger;reboot-f";#脑裂之后的操作
- local-io-error"/usr/lib/drbd/notify-io-error.sh;/usr/lib/drbd/notify-emergency-shutdown.sh;echoo>/proc/sysrq-trigger;halt-f";#本地i/o错误之后的操作
- #fence-peer"/usr/lib/drbd/crm-fence-peer.sh";
- #split-brain"/usr/lib/drbd/notify-split-brain.shroot";
- #out-of-sync"/usr/lib/drbd/notify-out-of-sync.shroot";
- #before-resync-target"/usr/lib/drbd/snapshot-resync-target-lvm.sh-p15---c16k";
- #after-resync-target/usr/lib/drbd/unsnapshot-resync-target-lvm.sh;
- }
- startup{
- #wfc-timeoutdegr-wfc-timeoutoutdated-wfc-timeoutwait-after-sb#设备启动时,两个节点要同步,设置节点的等待时间,超时时间等
- }
- options{
- #cpu-maskon-no-data-accessible
- }
- disk{
- on-io-errordetach;#一旦发生i/o错误,就把磁盘卸载。不继续进行同步
- #sizemax-bio-bvecson-io-errorfencingdisk-barrierdisk-flushes
- #disk-drainmd-flushesresync-rateresync-afteral-extents
- #c-plan-aheadc-delay-targetc-fill-targetc-max-rate
- #c-min-ratedisk-timeout
- }
- net{#设置网络的buffers/cache大小,初始化时间等
- #protocoltimeoutmax-epoch-sizemax-buffersunplug-watermark
- #connect-intping-intsndbuf-sizercvbuf-sizeko-count
- #allow-two-primariescram-hmac-algshared-secretafter-sb-0pri
- #after-sb-1priafter-sb-2prialways-asbprr-conflict
- #ping-timeoutdata-integrity-algtcp-corkon-congestion
- #congestion-fillcongestion-extentscsums-algverify-alg
- #use-rle
- cram-hmac-alg"sha1";#数据加密使用的算法
- shared-secret"mydrbd1fa2jg8";#验证密码
- }
- syncer{
- rate200M;#定义数据传输速率
- }
- }
复制代码 10.2、配置资源文件,资源配置文件的名字要和资源文件中的一样- [root@test1 drbd.d]#vim mydrbd.res
- resource mydrbd{#资源名称,可以是任意的ascii码不包含空格的字符
- on test1.local{#节点1,每个节点必须要能使用名称的方式解析对方节点
- device /dev/drbd0;#drbd设备的文件名叫什么
- disk /dev/sdb1;#分区设备是哪个
- address 192.168.10.55:7789;#节点ip和监听的端口
- meta-disk internal; #drbd的meta(原数据)放在什么地方,internal是放在设备内部
- }
- on test2.local{
- device /dev/drbd0;
- disk /dev/sdb1;
- address 192.168.10.56:7789;
- meta-disk internal;
- }
- }
复制代码 10.3、两个节点的配置文件一样,使用工具把配置文件传到另一个节点- [root@test1 drbd.d]#scp -r /usr/local/drbd/etc/drbd.* test2.local:/usr/local/drbd/etc/
复制代码 10.4、在每个节点上初始化已定义的资源- [root@test1 drbd.d]#drbdadm create-md mydrbd
- --==Thankyouforparticipatingintheglobalusagesurvey==--
- Theserver'sresponseis:
- Writingmetadata...
- initializingactivitylog
- NOTinitializedbitmap
- Newdrbdmetadatablocksuccessfullycreated.
- [root@test1 drbd.d]#
-
- [root@test2 drbd.d]#drbdadm create-md mydrbd
- --==Thankyouforparticipatingintheglobalusagesurvey==--
- Theserver'sresponseis:
- Writingmetadata...
- initializingactivitylog
- NOTinitializedbitmap
- Newdrbdmetadatablocksuccessfullycreated.
- [root@test2 drbd.d]#
复制代码 10.5、分别启动两个节点的drbd服务- [root@test1drbd.d]#service drbd start
- [root@test2drbd.d]#service drbd start
复制代码 11、测试drbd的同步
11.1、查看drbd的启动状态- [root@test1 drbd.d]#cat /proc/drbd
- version:8.4.3(api:1/proto:86-101)
- GIT-hash:89a294209144b68adb3ee85a73221f964d3ee515buildbyroot@test1.local,2016-02-2310:23:03
- 0:cs:Connectedro:Secondary/Secondaryds:Inconsistent/InconsistentCr-----#两个节点都是从,将来可以把一个提升为主。Inconsistent处于没有同步的状态
- ns:0nr:0dw:0dr:0al:0bm:0lo:0pe:0ua:0ap:0ep:1wo:boos:0
复制代码 11.2、提升一个节点为主,并覆盖从节点的drbd分区数据。在要提升为主的节点上执行- [root@test1 drbd.d]#drbdadm -- --overwrite-data-of-peer primary mydrbd
复制代码 11.3、查看主节点同步状态- [root@test1drbd.d]#watch -n 1 cat /proc/drbd
- Every1.0s:cat/proc/drbdTueFeb2317:10:552016
- version:8.4.3(api:1/proto:86-101)
- GIT-hash:89a294209144b68adb3ee85a73221f964d3ee515buildbyroot@test1.local,2016-02-2310:23:03
- 0:cs:SyncSourcero:Primary/Secondaryds:UpToDate/InconsistentCr---n-
- ns:619656nr:0dw:0dr:627840al:0bm:37lo:1pe:8ua:64ap:0ep:1wo:boos:369144
- [=============>.......]sync'ed:10.3%(369144/987896)K
- finish:0:00:12speed:25,632(25,464)K/sec
复制代码 11.4、查看从节点的状态- [root@test2 drbd]#cat /proc/drbd
- version:8.4.3(api:1/proto:86-101)
- GIT-hash:89a294209144b68adb3ee85a73221f964d3ee515buildbyroot@test2.local,2016-02-2216:05:34
- 0:cs:Connectedro:Secondary/Primaryds:UpToDate/UpToDateCr-----
- ns:4nr:9728024dw:9728028dr:1025al:1bm:577lo:0pe:0ua:0ap:0ep:1wo:foos:0
复制代码 11.5、在主节点格式化分区并挂在写入数据测试- [root@test1 drbd]#mke2fs -j /dev/drbd0
- [root@test1 drbd]#mkdir /mydrbd
- [root@test1 drbd]#mount /dev/drdb0/mydrbd
- [root@test1 drbd]#cd /mydrbd
- [root@test1 mydrbd]#touch drbd_test_file
- [root@test1 mydrbd]#ls /mydrbd/
- drbd_test_filelost+found
复制代码 11.6、把主节点降级为从,把从节点提升为主。查看数据是否同步
11.1、主节点操作
11.1.1、卸载分区,注意卸载的时候要退出挂在目录,否则会显示设备忙,不能卸载- [root@test1 mydrbd]#cd ~
- [root@test1~]#umount /mydrbd
- [root@test1~]#drbdadm secondary mydrbd
复制代码 11.1.2、查看现在的drbd状态- [root@test1~]#cat /proc/drbd
- version:8.4.3(api:1/proto:86-101)
- GIT-hash:89a294209144b68adb3ee85a73221f964d3ee515buildbyroot@test2.local,2016-02-2216:05:34
- 0:cs:Connectedro:Secondary/Secondaryds:UpToDate/UpToDateCr-----
- ns:4nr:9728024dw:9728028dr:1025al:1bm:577lo:0pe:0ua:0ap:0ep:1wo:foos:0
复制代码 注:可以看到,现在drbd的两个节点的状态都是secondary的,下面把从节点提升为主
11.2、从节点操作
11.2.1、提升操作- [root@test1~]#drdbadm primary mydrbd
复制代码 11.2.2、挂在drbd分区- [root@test1~]#mkdir /mydrbd
- [root@test1~]#mount /dev/drbd0 /mydrbd/
复制代码 11.2.3、查看是否有数据- [root@test2~]#ls /myddrbd/
- drbd_test_filelost+found
复制代码 注:可以看到从节点切换成主后,已经同步了数据。drbd搭建完成。下面结合corosync+mysql配置双主高可用。
12、结合corosync+drbd+mysql实现数据库双主高可用
将drbd配置为corosync双节点高可用集群中的资源,能够实现主从角色的自动切换,注意,要把某一个服务配置为高可用集群的资源,一定不能让这个服务开机自动启动。
12.1、关闭两台节点的drbd开机自启动
12.1.1、主节点操作- [root@test1 drbd.d]#chkconfig drbd off
- [root@test1 drbd.d]#chkconfig --list | grep drbd
- drbd0:off1:off2:off3:off4:off5:off6:off
复制代码 12.1.2、从节点操作- [root@test2 drbd.d]#chkconfig drbd off
- [root@test2 drbd.d]#chkconfig --list | grep drbd
- drbd0:off1:off2:off3:off4:off5:off6:off
复制代码 12.2、卸载drbd的文件系统并把主节点降级为从节点
12.2.1、从节点操作,注意,这里的从节点刚才提升为主了。现在把他降级- [root@test2 drbd]#umount /mydata/
- [root@test2 drbd]#drbdadm secondary mydrbd
- [root@test2 drbd]#cat /proc/drbd
- version:8.4.3(api:1/proto:86-101)
- GIT-hash:89a294209144b68adb3ee85a73221f964d3ee515buildbyroot@test2.local,2016-02-2216:05:34
- 0:cs:Connectedro:Secondary/Secondaryds:UpToDate/UpToDateCr-----
- ns:8nr:9728024dw:9728032dr:1073al:1bm:577lo:0pe:0ua:0ap:0ep:1wo:foos:0
复制代码 注:确保两个节点都是secondary
12.3、停止两个节点的drbd服务
12.3.1、从节点操作- [root@test2 drbd]#service drbd stop
- StoppingallDRBDresources:.
- [root@test2 drbd]#
复制代码 12.3.2、主节点操作- [root@test1 drbd.d]#service drbd stop
- StoppingallDRBDresources:.
- [root@test1 drbd.d]#
复制代码 12.4、安装corosync并创建日志目录
12.4.1、主节点操作- [root@test1 drbd.d]#wget -P /etc/yum.repos.d http://download.opensuse.org/repositories/network
- [root@test1 drbd.d]#yum install corosync pacemaker crmsh
- [root@test1 drbd.d]#mkdir /var/log/cluster
复制代码 12.4.2、从节点操作
[root@test1drbd.d]#wget-P/etc/yum.repos.d<a rel="nofollow" target="_blank"></a><a rel="nofollow" target="_blank">http://download.opensuse.org/repositories/network</a>:/ha-clustering:/Stable/CentOS_CentOS-6/network:ha-clustering:Stable.repo
[root@test2drbd.d]#mkdir/var/log/cluster
[root@test2drbd.d]#yuminstallcorosyncpacemakercrmsh
12.5、corosync配置文件
12.5.1、主节点操作
[root@test1drbd.d]#cd/etc/corosync/
[root@test1corosync]#cpcorosync.conf.examplecorosync.conf
12.6、配置主节点配置文件,生成corosync秘钥文件并复制给从节点(包括主配置文件)
12.6.1、主节点操作
[root@test1corosync]#vimcorosync.conf
#Pleasereadthecorosync.conf.5manualpage
compatibility:whitetank
totem{
version:2#secauth:Enablemutualnodeauthentication.Ifyouchooseto
#enablethis("on"),thendoremembertocreateashared
#secretwith"corosync-keygen".
secauth:on
threads:2
#interface:defineatleastoneinterfacetocommunicate
#over.Ifyoudefinemorethanoneinterfacestanza,youmust
#alsosetrrp_mode.
interface{
#Ringsmustbeconsecutivelynumbered,startingat0.
ringnumber:0
#Thisisnormallythe*network*addressofthe
#interfacetobindto.Thisensuresthatyoucanuse
#identicalinstancesofthisconfigurationfile
#acrossallyourclusternodes,withouthavingto
#modifythisoption.
bindnetaddr:192.168.10.0
#However,ifyouhavemultiplephysicalnetwork
#interfacesconfiguredforthesamesubnet,thenthe
#networkaddressaloneisnotsufficienttoidentify
#theinterfaceCorosyncshouldbindto.Inthatcase,
#configurethe*host*addressoftheinterface
#instead:
bindnetaddr:192.168.10.0
#Whenselectingamulticastaddress,considerRFC
#2365(which,amongotherthings,specifiesthat
#239.255.x.xaddressesarelefttothediscretionof
#thenetworkadministrator).Donotreusemulticast
#addressesacrossmultipleCorosyncclusterssharing
#thesamenetwork.
mcastaddr:239.212.16.19
#CorosyncusestheportyouspecifyhereforUDP
#messaging,andalsotheimmediatelypreceding
#port.Thusifyousetthisto5405,Corosyncsends
#messagesoverUDPports5405and5404.
mcastport:5405
#Time-to-liveforclustercommunicationpackets.The
#numberofhops(routers)thatthisringwillallow
#itselftopass.Notethatmulticastroutingmustbe
#specificallyenabledonmostnetworkrouters.
ttl:1#每一个数据报文不允许经过路由
}
}
logging{
#Logthesourcefileandlinewheremessagesarebeing
#generated.Whenindoubt,leaveoff.Potentiallyusefulfor
#debugging.
fileline:off
#Logtostandarderror.Whenindoubt,settono.Usefulwhen
#runningintheforeground(wheninvoking"corosync-f")
to_stderr:no
#Logtoalogfile.Whensetto"no",the"logfile"option
#mustnotbeset.
to_logfile:yes
logfile:/var/log/cluster/corosync.log
#Logtothesystemlogdaemon.Whenindoubt,settoyes.
to_syslog:no
#Logdebugmessages(veryverbose).Whenindoubt,leaveoff.
debug:off
#Logmessageswithtimestamps.Whenindoubt,settoon
#(unlessyouareonlyloggingtosyslog,wheredouble
#timestampscanbeannoying).
timestamp:on
logger_subsys{
subsys:AMF
debug:off
}
}
service{
ver:0
name:pacemaker
}
aisexec{
user:root
group:root
}
[root@test1corosync]#corosync-keygen
[root@test1corosync]#scp-pauthkeycorosync.conftest2.local:/etc/corosync/
12.7、启动corosync
12.7.1、主节点操作(注意:两个corosync的启动操作都要在主节点上进行)
[root@test1corosync]#servicecorosyncstart
StartingCorosyncClusterEngine(corosync):[OK]
[root@test1corosync]#sshtest2.local'servicecorosyncstart'
root@test2.local'spassword:
StartingCorosyncClusterEngine(corosync):[OK]
12.8、查看集群状态
12.8.1、问题:安装之后系统没有crm命令,不能使用crm的交互式模
[root@test1corosync]#crmstatus
-bash:crm:commandnotfound
解决办法:安装ha-cluster的yum源,在安装crmsh软件包
[root@test1corosync]#wget -P /etc/yum.repos.d/ http://download.opensuse.org/repositories/network
参考文档:http://www.dwhd.org/20150530_014731.html 中的第二,安装crmsh步骤
安装完成后就可以使用crm命令行模式了
12.8.2、查看集群节点状态
[root@test1corosync]#crm status
Lastupdated:WedFeb2413:47:172016
Lastchange:WedFeb2411:26:062016
Stack:classicopenais(withplugin)
CurrentDC:test2.local-partitionwithquorum
Version:1.1.11-97629de
2Nodesconfigured,2expectedvotes
0Resourcesconfigured
Online:[test1.localtest2.local]
Fulllistofresources:
注:显示有2个nodes已配置并处于在线状态
12.8.3、查看pacemaker是否启动
[root@test1corosync]#greppcmk_startup/var/log/cluster/corosync.log
Feb2411:05:15corosync[pcmk]info:pcmk_startup:CRM:Initialized
Feb2411:05:15corosync[pcmk]Logging:Initializedpcmk_startup
12.8.4、检查集群引擎是否启动
[root@test1corosync]#grep-e"CorosyncClusterEngine"-e"configurationfile"/var/log/cluster/corosync.log
Feb2411:04:16corosync[MAIN]CorosyncClusterEngine('1.4.7'):startedandreadytoprovideservice.
Feb2411:04:16corosync[MAIN]Successfullyreadmainconfigurationfile'/etc/corosync/corosync.conf'.
注:经过上面的步骤,可以确认corosync的服务已经启动并没有问题了
12.9、配置corosync的属性
12.9.1、禁用STONITH设备以保证verify不会出错
[root@test1corosync]#crmconfigure
crm(live)configure#propertystonith-enabled=false
crm(live)configure#verify
crm(live)configure#commit
12.9.2、配置当不具备法定票数的时候不能关闭服务
crm(live)configure#propertyno-quorum-policy=ignore
crm(live)configure#verify
crm(live)configure#commit
12.9.3、配置资源默认粘性值
crm(live)configure#rsc_defaultsresource-stickiness=100
crm(live)configure#verify
crm(live)configure#commit
12.9.3、查看当前的配置
crm(live)configure#show
nodetest1.local
nodetest2.local
propertycib-bootstrap-options:\
dc-version=1.1.11-97629de\
cluster-infrastructure="classicopenais(withplugin)"\
expected-quorum-votes=2\
stonith-enabled=false\
no-quorum-policy=ignore
rsc_defaultsrsc-options:\
resource-stickiness=100
12.10、配置集群资源
12.10.1、定义drbd的资源
crm(live)configure#primitivemysqldrbdocf:linbit:drbdparamsdrbd_resource=mydrbdopstarttimeout=240opstoptimeout=100opmonitorrole=Masterinterval=10timeout=20opmonitorrole=Slaveinterval=20timeout=20
注:ocf:资源代理,这里用linbit代理drbd。drbd_resource=mydrbd:drbd的资源名字。starttimeout:启动超时时间。stoptimeout:停止超时时间。monitorrole=Master:定义主节点的监控时间,interval:监控间隔,timeout:超时时间。monitorrole=Slave:定义从节点的监控时间,interval:监控间隔,timeout:超时时间
crm(live)configure#show#查看配置
nodetest1.local
nodetest2.local
primitivemydrbdocf:linbit:drbd\
paramsdrbd_resource=mydrbd\
opstarttimeout=240interval=0\
opstoptimeout=100interval=0\
opmonitorrole=Masterinterval=10stimeout=20s\
opmonitorrole=Slaveinterval=20stimeout=20s
propertycib-bootstrap-options:\
dc-version=1.1.11-97629de\
cluster-infrastructure="classicopenais(withplugin)"\
expected-quorum-votes=2\
stonith-enabled=false\
no-quorum-policy=ignore
rsc_defaultsrsc-options:\
resource-stickiness=100
crm(live)configure#verify#验证配置
12.10.2、定义drbd的主从资源
crm(live)configure#msms_mysqldrbdmysqldrbdmetamaster-max=1master-node-max=1clone-max=2clone-node-max=1notify=true
注:msms_mydrbdmydrbd:把mydrbd做成主从,这个资源名称叫ms_mydrbd。meta:定义元数据属性。master-max=1:最多有1个主资源,master-node-max=1:最多有1个主节点,clone-max=2:最多有2个克隆,clone-node-max=1:每个节点上,可以启动几个克隆资源。
crm(live)configure#verify
crm(live)configure#commit
crm(live)configure#show
nodetest1.local
nodetest2.local
primitivemydrbdocf:linbit:drbd\
paramsdrbd_resource=mydrbd\
opstarttimeout=240interval=0\
opstoptimeout=100interval=0\
opmonitorrole=Masterinterval=10stimeout=20s\
opmonitorrole=Slaveinterval=20stimeout=20s
msms_mydrbdmydrbd\
metamaster-max=1master-node-max=1clone-max=2clone-node-max=1
propertycib-bootstrap-options:\
dc-version=1.1.11-97629de\
cluster-infrastructure="classicopenais(withplugin)"\
expected-quorum-votes=2\
stonith-enabled=false\
no-quorum-policy=ignore
rsc_defaultsrsc-options:\
resource-stickiness=100
注:可以看到现在配置有一个primitive mydrbd的资源,一个ms的主从类型。
12.10.3、查看集群节点状态
crm(live)configure#cd
crm(live)#status
Lastupdated:ThuFeb2514:45:522016
Lastchange:ThuFeb2514:44:442016
Stack:classicopenais(withplugin)
CurrentDC:test1.local-partitionwithquorum
Version:1.1.11-97629de
2Nodesconfigured,2expectedvotes
2Resourcesconfigured
Online:[test1.localtest2.local]
Fulllistofresources:
Master/SlaveSet:ms_mysqldrbd[mysqldrbd]
Masters:[test1.local]
Slaves:[test2.local]
注:正常状态,已经可以看到主从状态,test1是master。
错误状态:
Master/SlaveSet:ms_mydrbd[mydrbd]
mydrbd(ocf::linbit:drbd):FAILEDtest2.local(unmanaged)
mydrbd(ocf::linbit:drbd):FAILEDtest1.local(unmanaged)
Failedactions:
mydrbd_stop_0ontest2.local'notconfigured'(6):call=87,status=complete,last-rc-change='ThuFeb2514:17:342016',queued=0ms,exec=34ms
mydrbd_stop_0ontest2.local'notconfigured'(6):call=87,status=complete,last-rc-change='ThuFeb2514:17:342016',queued=0ms,exec=34ms
mydrbd_stop_0ontest1.local'notconfigured'(6):call=72,status=complete,last-rc-change='ThuFeb2514:17:342016',queued=0ms,exec=34ms
mydrbd_stop_0ontest1.local'notconfigured'(6):call=72,status=complete,last-rc-change='ThuFeb2514:17:342016',queued=0ms,exec=34ms解决办法:定义资源的时候要注意,drbd_resource=mydrbd的名字是drbd资源的名字且主从资源的名称不能和drbd资源的名称一样,还有各种超时设置中不要加s。测试了很久,才找到这个问题。。。。如有不同看法,请各位大神赐教,谢谢。
12.10.4、验证主从的切换
[root@test1~]#crmnodestandbytest1.local#将主节点下线
[root@test1~]#crmstatus注:查看状态,显示主节点已经不在线,而test2成为了master
Lastupdated:ThuFeb2514:51:582016
Lastchange:ThuFeb2514:51:442016
Stack:classicopenais(withplugin)
CurrentDC:test1.local-partitionwithquorum
Version:1.1.11-97629de
2Nodesconfigured,2expectedvotes
2Resourcesconfigured
Nodetest1.local:standby
Online:[test2.local]
Fulllistofresources:
Master/SlaveSet:ms_mysqldrbd[mysqldrbd]
Masters:[test2.local]
Stopped:[test1.local]
[root@test1~]#crmnodeonlinetest1.local#重新将test1上线
[root@test1~]#crmstatus#查看状态,显示test依旧为master,而test1成为了slave
Lastupdated:ThuFeb2514:52:552016
Lastchange:ThuFeb2514:52:392016
Stack:classicopenais(withplugin)
CurrentDC:test1.local-partitionwithquorum
Version:1.1.11-97629de
2Nodesconfigured,2expectedvotes
2Resourcesconfigured
Online:[test1.localtest2.local]
Fulllistofresources:
Master/SlaveSet:ms_mysqldrbd[mysqldrbd]
Masters:[test2.local]
Slaves:[test1.local]
12.10.5、定义文件系统资源
[root@test1~]#crm
crm(live)#configure
crm(live)configure#primitivemystoreocf:heartbeat:Filesystemparamsdevice=/dev/drbd0directory=/mydrbdfstype=ext3opstarttimeout=60opstoptimeout=60注:这里的语句表示,primitivemystore:定义一个资源mystore,使用heartbeat的文件系统,params参数定义:drbd的设备名,挂在目录,文件系统类型,和启动停止超时时间
crm(live)configure#verify
12.10.6、定义排列约束以确保Filesystem和主节点在一起。
crm(live)configure#colocationmystore_withms_mysqldrbdinf:mystorems_mysqldrbd:Master
crm(live)configure#verify
12.10.7、定义Order约束,以确保主从资源必须要先成为主节点以后才能挂在文件系统
crm(live)configure#ordermystore_after_ms_mysqldrbdmandatory:ms_mysqldrbd:promotemystore:start注:这里的语句表示,mystore_after_ms_mysqldrbdmandatory:,mystore在ms_mysqldrbd之后启动,mandatory(代表强制的),先启动ms_mysqldrbd,promote(角色切换成功后),在启动mystore:start
crm(live)configure#verify
crm(live)configure#commit
crm(live)configure#cd
crm(live)#status#查看状态,可以看到文件系统已经自动挂在到主节点test1.local上了。
Lastupdated:ThuFeb2515:29:392016
Lastchange:ThuFeb2515:29:362016
Stack:classicopenais(withplugin)
CurrentDC:test1.local-partitionwithquorum
Version:1.1.11-97629de
2Nodesconfigured,2expectedvotes
3Resourcesconfigured
Online:[test1.localtest2.local]
Fulllistofresources:
Master/SlaveSet:ms_mysqldrbd[mysqldrbd]
Masters:[test1.local]
Slaves:[test2.local]
mystore(ocf::heartbeat:Filesystem):Startedtest1.local
[root@test1~]#ls/mydrbd/#已经有之前创建的文件了。
inittablost+found
12.10.8、切换主从节点,验证文件系统是否会自动挂载
[root@test1~]#crmnodestandbytest1.local
[root@test1~]#crmnodeonlinetest1.local
[root@test1~]#crmstatus
Lastupdated:ThuFeb2515:32:392016
Lastchange:ThuFeb2515:32:362016
Stack:classicopenais(withplugin)
CurrentDC:test1.local-partitionwithquorum
Version:1.1.11-97629de
2Nodesconfigured,2expectedvotes
3Resourcesconfigured
Online:[test1.localtest2.local]
Fulllistofresources:
Master/SlaveSet:ms_mysqldrbd[mysqldrbd]
Masters:[test2.local]
Slaves:[test1.local]
mystore(ocf::heartbeat:Filesystem):Startedtest2.local
[root@test2~]#ls/mydrbd/
inittablost+found
12.9.12、配置mysql
12.9.12.1、关闭mysqld的开机自启动
[root@test1~]#chkconfigmysqldoff
[root@test2~]#chkconfigmysqldoff#一定要记住,只要是高可用集群中的资源的服务,一定不能开机自启动
12.9.12.2、配置主节点1的mysql服务(mysql安装就不写了,直接进入mysql的配置)
[root@test1mysql]#mkdir/mydrbd/data
[root@test1mysql]#chown-Rmysql.mysql/mydrbd/data/
[root@test1mysql]#./scripts/mysql_install_db--user=mysql--datadir=/mydrbd/data/--basedir=/usr/local/mysql/
InstallingMySQLsystemtables...
16022516:07:12[Note]/usr/local/mysql//bin/mysqld(mysqld5.5.44)startingasprocess18694...
OK
Fillinghelptables...
16022516:07:18[Note]/usr/local/mysql//bin/mysqld(mysqld5.5.44)startingasprocess18701...
OK
Tostartmysqldatboottimeyouhavetocopy
support-files/mysql.servertotherightplaceforyoursystem
PLEASEREMEMBERTOSETAPASSWORDFORTHEMySQLrootUSER!
Todoso,starttheserver,thenissuethefollowingcommands:
/usr/local/mysql//bin/mysqladmin-urootpassword'new-password'
/usr/local/mysql//bin/mysqladmin-uroot-htest1.localpassword'new-password'
Alternativelyyoucanrun:
/usr/local/mysql//bin/mysql_secure_installation
whichwillalsogiveyoutheoptionofremovingthetest
databasesandanonymoususercreatedbydefault.Thisis
stronglyrecommendedforproductionservers.
Seethemanualformoreinstructions.
YoucanstarttheMySQLdaemonwith:
cd/usr/local/mysql/;/usr/local/mysql//bin/mysqld_safe&
YoucantesttheMySQLdaemonwithmysql-test-run.pl
cd/usr/local/mysql//mysql-test;perlmysql-test-run.pl
Pleasereportanyproblemsat
[root@test1mysql]#servicemysqldstart
StartingMySQL.....[OK]
[root@test1mysql]#mysql-uroot
WelcometotheMySQLmonitor.Commandsendwith;or\g.
YourMySQLconnectionidis2
Serverversion:5.5.44Sourcedistribution
Copyright(c)2000,2013,Oracleand/oritsaffiliates.Allrightsreserved.
OracleisaregisteredtrademarkofOracleCorporationand/orits
affiliates.Othernamesmaybetrademarksoftheirrespective
owners.
Type'help;'or'\h'forhelp.Type'\c'toclearthecurrentinputstatement.
mysql>showdatabases;
+--------------------+
|Database|
+--------------------+
|information_schema|
|mysql|
|performance_schema|
|test|
+--------------------+
4rowsinset(0.06sec)
mysql>createdatabasedrbd_mysql;
QueryOK,1rowaffected(0.00sec)
mysql>showdatabases;
+--------------------+
|Database|
+--------------------+
|information_schema|
|drbd_mysql|
|mysql|
|performance_schema|
|test|
+--------------------+
5rowsinset(0.00sec)
mysql>
12.9.12.3、配置从节点的mysql
注:因为刚才已经在test1.local上的共享存储上初始化了mysql的data目录,在test2.local上就不用重复初始化了。
[root@test1mysql]#crmstatus
Lastupdated:ThuFeb2516:14:142016
Lastchange:ThuFeb2515:35:162016
Stack:classicopenais(withplugin)
CurrentDC:test1.local-partitionwithquorum
Version:1.1.11-97629de
2Nodesconfigured,2expectedvotes
3Resourcesconfigured
Online:[test1.localtest2.local]
Fulllistofresources:
Master/SlaveSet:ms_mysqldrbd[mysqldrbd]
Masters:[test1.local]
Slaves:[test2.local]
mystore(ocf::heartbeat:Filesystem):Startedtest1.local
1、先让test2.local成为master才能继续操作
[root@test1mysql]#crmnodestandbytest1.local
[root@test1mysql]#crmnodeonlinetest1.local
[root@test1mysql]#crmstatus
Lastupdated:ThuFeb2516:14:462016
Lastchange:ThuFeb2516:14:302016
Stack:classicopenais(withplugin)
CurrentDC:test1.local-partitionwithquorum
Version:1.1.11-97629de
2Nodesconfigured,2expectedvotes
3Resourcesconfigured
Nodetest1.local:standby
Online:[test2.local]
Fulllistofresources:
Master/SlaveSet:ms_mysqldrbd[mysqldrbd]
Masters:[test2.local]
Stopped:[test1.local]
mystore(ocf::heartbeat:Filesystem):Startedtest2.local#要确保让test2.local成为master节点
2、test2.local的mysql配置
[root@test2~]#vim/etc/my.cnf
添加:
datadir=/mydrbd/data
[root@test2~]#servicemysqldstart
StartingMySQL.[OK]
[root@test2~]#mysql-uroot
WelcometotheMySQLmonitor.Commandsendwith;or\g.
YourMySQLconnectionidis1
Serverversion:5.5.44Sourcedistribution
Copyright(c)2000,2013,Oracleand/oritsaffiliates.Allrightsreserved.
OracleisaregisteredtrademarkofOracleCorporationand/orits
affiliates.Othernamesmaybetrademarksoftheirrespective
owners.
Type'help;'or'\h'forhelp.Type'\c'toclearthecurrentinputstatement.
mysql>showdatabases;
+--------------------+
|Database|
+--------------------+
|information_schema|
|drbd_mysql|
|mysql|
|performance_schema|
|test|
+--------------------+
5rowsinset(0.10sec)
mysql>
12.9.13、定义mysql资源
1、停止mysql
[root@test2~]#servicemysqldstop
ShuttingdownMySQL.[OK]
2、定义mysql资源
[root@test1mysql]#crmconfigure
crm(live)configure#primitivemysqldlsb:mysqld
crm(live)configure#verify
3、定义mysql和主节点约束
crm(live)configure#colocationmysqld_with_mystoreinf:mysqldmystore#注:因为mystore一定和主节点在一起,那么我们就定义mysql和mystore的约束。
crm(live)configure#verify
4、定义mysql和mystore启动次序约束
crm(live)configure#ordermysqld_after_mystoremandatory:mystoremysqld#一定要弄清楚启动的先后次序,mysql是在mystore之后启动的。
crm(live)configure#verify
crm(live)configure#commit
crm(live)configure#cd
crm(live)#status
Lastupdated:ThuFeb2516:44:292016
Lastchange:ThuFeb2516:42:162016
Stack:classicopenais(withplugin)
CurrentDC:test1.local-partitionwithquorum
Version:1.1.11-97629de
2Nodesconfigured,2expectedvotes
4Resourcesconfigured
Online:[test1.localtest2.local]
Fulllistofresources:
Master/SlaveSet:ms_mysqldrbd[mysqldrbd]
Masters:[test2.local]
Slaves:[test1.local]
mystore(ocf::heartbeat:Filesystem):Startedtest2.local
mysqld(lsb:mysqld):Startedtest2.local注:现在主节点在test2.local上。
5、验证test2.local上的mysql登录是否正常和角色切换后是否正常
[root@test2~]#mysql-uroot
WelcometotheMySQLmonitor.Commandsendwith;or\g.
YourMySQLconnectionidis2
Serverversion:5.5.44Sourcedistribution
Copyright(c)2000,2013,Oracleand/oritsaffiliates.Allrightsreserved.
OracleisaregisteredtrademarkofOracleCorporationand/orits
affiliates.Othernamesmaybetrademarksoftheirrespective
owners.
Type'help;'or'\h'forhelp.Type'\c'toclearthecurrentinputstatement.
mysql>showdatabases;#test2.local上已经启动好了mysql并自动挂在了drbd资源
+--------------------+
|Database|
+--------------------+
|information_schema|
|drbd_mysql|
|mysql|
|performance_schema|
|test|
+--------------------+
5rowsinset(0.07sec)
mysql>createdatabasemydb;#创建一个数据库,然后切换到test1.local节点上,看是否正常
QueryOK,1rowaffected(0.00sec)
mysql>showdatabases;
+--------------------+
|Database|
+--------------------+
|information_schema|
|drbd_mysql|
|mydb|
|mysql|
|performance_schema|
|test|
+--------------------+
6rowsinset(0.00sec)
mysql>exit
[root@test1mysql]#crmnodestandbytest2.local#将test2.local主节点standby,让test1.local自动成为master
[root@test1mysql]#crmnodeonlinetest2.local
[root@test1mysql]#crmstatus
Lastupdated:ThuFeb2516:53:242016
Lastchange:ThuFeb2516:53:192016
Stack:classicopenais(withplugin)
CurrentDC:test1.local-partitionwithquorum
Version:1.1.11-97629de
2Nodesconfigured,2expectedvotes
4Resourcesconfigured
Online:[test1.localtest2.local]
Fulllistofresources:
Master/SlaveSet:ms_mysqldrbd[mysqldrbd]
Masters:[test1.local]
Slaves:[test2.local]
mystore(ocf::heartbeat:Filesystem):Startedtest1.local#test1.local已经成为master
mysqld(lsb:mysqld):Startedtest1.local
[root@test1mysql]#mysql-uroot#在test1.local上登录mysql
WelcometotheMySQLmonitor.Commandsendwith;or\g.
YourMySQLconnectionidis1
Serverversion:5.5.44Sourcedistribution
Copyright(c)2000,2013,Oracleand/oritsaffiliates.Allrightsreserved.
OracleisaregisteredtrademarkofOracleCorporationand/orits
affiliates.Othernamesmaybetrademarksoftheirrespective
owners.
Type'help;'or'\h'forhelp.Type'\c'toclearthecurrentinputstatement.
mysql>showdatabases;
+--------------------+
|Database|
+--------------------+
|information_schema|
|drbd_mysql|
|mydb|#已经有刚才在test2.local上创建的mydb数据库。目前,一切正常
|mysql|
|performance_schema|
|test|
+--------------------+
6rowsinset(0.15sec)
mysql>
12.9.14、定义VIP资源及约束关系
crm(live)configure#primitivemyipocf:heartbeat:IPaddrparamsip=192.168.10.3nic=eth0cidr_netmask=24#这里出了一个错误,浪费半天时间,是因为子网掩码写的255.255.255.0,应该写成24,忘记命令的时候,要多使用table和help。
crm(live)configure#verify
crm(live)configure#colocationmyip_with_ms_mysqldrbdinf:ms_mysqldrbd:Mastermyip#定义vip和ms_mysqldrbd的约束关系
crm(live)configure#verify
crm(live)configure#commit
crm(live)configure#cd
crm(live)#status#查看状态
Lastupdated:FriFeb2610:05:162016
Lastchange:FriFeb2610:05:122016
Stack:classicopenais(withplugin)
CurrentDC:test1.local-partitionwithquorum
Version:1.1.11-97629de
2Nodesconfigured,2expectedvotes
5Resourcesconfigured
Online:[test1.localtest2.local]
Fulllistofresources:
Master/SlaveSet:ms_mysqldrbd[mysqldrbd]
Masters:[test1.local]
Slaves:[test2.local]
mystore(ocf::heartbeat:Filesystem):Startedtest1.local
mysqld(lsb:mysqld):Startedtest1.local
myip(ocf::heartbeat:IPaddr):Startedtest1.local#vip已经启动在test1.local节点上了。
12.9.15、测试连接VIP
[root@test1~]#ipaddr#查看test1.local上是否绑定VIP
1:lo:mtu65536qdiscnoqueuestateUNKNOWN
link/loopback00:00:00:00:00:00brd00:00:00:00:00:00
inet127.0.0.1/8scopehostlo
inet6::1/128scopehost
valid_lftforeverpreferred_lftforever
2:eth0:mtu1500qdiscpfifo_faststateUPqlen1000
link/ether00:0c:29:34:7d:9fbrdff:ff:ff:ff:ff:ff
inet192.168.10.55/24brd192.168.10.255scopeglobaleth0
inet192.168.10.3/24brd192.168.10.255scopeglobalsecondaryeth0#VIP已经绑定到test1.local上的eth0接口上
inet6fe80::20c:29ff:fe34:7d9f/64scopelink
valid_lftforeverpreferred_lftforever
[root@test-3~]#mysql-uroot-h192.168.10.3-p#使用VIP连接mysql,这里要给连接的客户端授权,不然不能登录
Enterpassword:
WelcometotheMySQLmonitor.Commandsendwith;or\g.
YourMySQLconnectionidis6
Serverversion:5.5.44Sourcedistribution
Copyright(c)2000,2013,Oracleand/oritsaffiliates.Allrightsreserved.
OracleisaregisteredtrademarkofOracleCorporationand/orits
affiliates.Othernamesmaybetrademarksoftheirrespective
owners.
Type'help;'or'\h'forhelp.Type'\c'toclearthecurrentinputstatement.
mysql>showdatabases;#下面有我们刚才创建的两个库
+--------------------+
|Database|
+--------------------+
|information_schema|
|drbd_mysql|
|mydb|
|mysql|
|performance_schema|
|test|
+--------------------+
6rowsinset(0.08sec)
模拟test1.local故障:
[root@test1mysql]#crmnodestandbytest1.local#将test1.local降级为slave,看vip是否会自动切换
[root@test1mysql]#crmnodeonlinetest1.local
[root@test1mysql]#crmstatus
Lastupdated:FriFeb2610:20:382016
Lastchange:FriFeb2610:20:352016
Stack:classicopenais(withplugin)
CurrentDC:test1.local-partitionwithquorum
Version:1.1.11-97629de
2Nodesconfigured,2expectedvotes
5Resourcesconfigured
Online:[test1.localtest2.local]
Fulllistofresources:
Master/SlaveSet:ms_mysqldrbd[mysqldrbd]
Masters:[test2.local]
Slaves:[test1.local]
mystore(ocf::heartbeat:Filesystem):Startedtest2.local
mysqld(lsb:mysqld):Startedtest2.local
myip(ocf::heartbeat:IPaddr):Startedtest2.local#vip已经在test2.local节点上了。
查看test2的IP信息:
[root@test2~]#ipaddr#在test2.local上查看VIP绑定信息
1:lo:mtu65536qdiscnoqueuestateUNKNOWN
link/loopback00:00:00:00:00:00brd00:00:00:00:00:00
inet127.0.0.1/8scopehostlo
inet6::1/128scopehost
valid_lftforeverpreferred_lftforever
2:eth0:mtu1500qdiscpfifo_faststateUPqlen1000
link/ether00:0c:29:fd:7f:e5brdff:ff:ff:ff:ff:ff
inet192.168.10.56/24brd192.168.10.255scopeglobaleth0
inet192.168.10.3/24brd192.168.10.255scopeglobalsecondaryeth0#VIP已经在test2.local上的eth0接口上。
inet6fe80::20c:29ff:fefd:7fe5/64scopelink
valid_lftforeverpreferred_lftforever
测试连接MySQL:
[root@test-3~]#mysql-uroot-h192.168.10.3-p#连接mysql
Enterpassword:
WelcometotheMySQLmonitor.Commandsendwith;or\g.
YourMySQLconnectionidis1
Serverversion:5.5.44Sourcedistribution
Copyright(c)2000,2013,Oracleand/oritsaffiliates.Allrightsreserved.
OracleisaregisteredtrademarkofOracleCorporationand/orits
affiliates.Othernamesmaybetrademarksoftheirrespective
owners.
Type'help;'or'\h'forhelp.Type'\c'toclearthecurrentinputstatement.
mysql>showdatabases;#一切正常。
+--------------------+
|Database|
+--------------------+
|information_schema|
|drbd_mysql|
|mydb|
|mysql|
|performance_schema|
|test|
+--------------------+
6rowsinset(0.06sec)
到此,corosync+drbd+mysql已经配置完毕,文档不够详细,没有corosync、heartbeat、drbd、mysql结合的原理讲解,没有发生脑裂后的处理办法和预防方法。以后有时间在加上吧。
以上就是corosync+drbd+mysql实现的高可用_MySQL的内容
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