mysql服务器的HA集群之corosync+drbd+pacemaker实现 上
通过HA实现服务器的高可用性,即通过corosync+drbd+pacemaker实现mysql服务器的高可用集群。
案例应用实现主要步骤:
一.准备工作:
二、DRBD安装配置步骤
三、mysql安装与配置
四、corosync+pacemaker的安装和配置
五、集群管理
实现详细步骤:
一.准备工作:
1.1 修改node1.magedu.com主机名,IP地址和系统时间
- [root@node1 ~]# hostname
- node1.magedu.com
- [root@node1 ~]# cat /etc/sysconfig/network
- NETWORKING=yes
- NETWORKING_IPV6=no
- HOSTNAME=node1.magedu.com
- [root@node1 ~]# hwclock -s
- [root@node1 ~]# date
- Tue Feb 7 20:24:22 CST 2012
- [root@node1 ~]#
- [root@node1 ~]# setup
- [root@node1 ~]# service network restart
- Shutting down interface eth0: [ OK ]
- Shutting down loopback interface: [ OK ]
- Bringing up loopback interface: [ OK ]
- Bringing up interface eth0: [ OK ]
- [root@node1 ~]# ifconfig eth0
- eth0 Link encap:Ethernet HWaddr 00:0C:29:AE:83:D1
- inet addr:192.168.101.81 Bcast:192.168.101.255 Mask:255.255.255.0
1.2 修改node2.magedu.com主机名,IP地址和系统时间
- [root@node2 ~]# hostname
- node2.magedu.com
- [root@node2 ~]# cat /etc/sysconfig/network
- NETWORKING=yes
- NETWORKING_IPV6=no
- HOSTNAME=node2.magedu.com
- [root@node2 ~]# hwclock -s
- [root@node2 ~]# date
- Tue Feb 7 20:25:49 CST 2012
- [root@node2 ~]#
- [root@node2 ~]# setup
- [root@node2 ~]# service network restart
- Shutting down interface eth0: [ OK ]
- Shutting down loopback interface: [ OK ]
- Bringing up loopback interface: [ OK ]
- Bringing up interface eth0: [ OK ]
- [root@node2 ~]# ifconfig eth0
- eth0 Link encap:Ethernet HWaddr 00:0C:29:D1:D4:32
- inet addr:192.168.101.82 Bcast:192.168.101.255 Mask:255.255.255.0
1.3 在node1和node2上配置hosts文件和ssh密钥信息
有利于以后在一个节点对另一节点直接操作。
1.3.1 在node1上修改/etc/hosts文件
- [root@node1 ~]# echo "192.168.101.81 node1.magedu.com node1" >>/etc/hosts
- [root@node1 ~]# echo "192.168.101.82 node2.magedu.com node2" >>/etc/hosts
1.3.1 在node1上修改/etc/hosts文件
- [root@node2 ~]# echo "192.168.101.81 node1.magedu.com node1" >>/etc/hosts
- [root@node2 ~]# echo "192.168.101.82 node2.magedu.com node2" >>/etc/hosts
1.3.3 在node1上配置ssh密钥信息
- [root@node1 ~]# ssh-keygen -t rsa #一直输入空格
- [root@node1 ~]# ssh-copy-id -i .ssh/id_rsa.pub root@node2.magedu.com
1.3.4 在node2上配置ssh密钥信息
- [root@node2 ~]# ssh-keygen -t rsa #一直输入空格
- [root@node2 ~]# ssh-copy-id -i .ssh/id_rsa.pub root@node1.magedu.com
- [root@node2 ~]# ssh node1 'ifconfig' #将看到node2上的信息
- The authenticity of host 'node1 (192.168.101.81)' can't be established.
- RSA key fingerprint is d4:f1:06:3b:a0:81:fd:85:65:20:9e:a1:ee:46:a6:8b.
- Are you sure you want to continue connecting (yes/no)? yes
- Warning: Permanently added 'node1' (RSA) to the list of known hosts.
- eth0 Link encap:Ethernet HWaddr 00:0C:29:AE:83:D1
- inet addr:192.168.101.81 Bcast:192.168.101.255 Mask:255.255.255.0
1.4 下载相关软件包:(这里我将下载的软件包放在/root/ha/下面了,共18个)
- [root@node1 ~]# cd ha/
- [root@node1 ha]#
- cluster-glue-1.0.6-1.6.el5.i386.rpm
- cluster-glue-libs-1.0.6-1.6.el5.i386.rpm
- corosync-1.2.7-1.1.el5.i386.rpm
- corosynclib-1.2.7-1.1.el5.i386.rpm
- drbd83-8.3.8-1.el5.centos.i386.rpm
- heartbeat-3.0.3-2.3.el5.i386.rpm
- heartbeat-libs-3.0.3-2.3.el5.i386.rpm
- kmod-drbd83-8.3.8-1.el5.centos.i686.rpm
- ldirectord-1.0.1-1.el5.i386.rpm
- libesmtp-1.0.4-5.el5.i386.rpm
- mysql-5.5.15-linux2.6-i686.tar.gz
- openais-1.1.3-1.6.el5.i386.rpm
- openaislib-1.1.3-1.6.el5.i386.rpm
- pacemaker-1.1.5-1.1.el5.i386.rpm
- pacemaker-cts-1.1.5-1.1.el5.i386.rpm
- pacemaker-libs-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
- 这里不需要ldirectord-1.0.1-1.el5.i386.rpm,故将其删除
- [root@node1 ha]# rm ldirectord-1.0.1-1.el5.i386.rpm
- rm: remove regular file `ldirectord-1.0.1-1.el5.i386.rpm'? y
- [root@node1 ha]# ssh node2 'mkdir /root/ha'
- [root@node1 ha]# scp *.rpm node2:/root/ha/#将相关软件包移动到node2上
- [root@node1 ha]# scp *.rpm node2:/root/ha/
- cluster-glue-1.0.6-1.6.el5.i386.rpm 100% 265KB 265.0KB/s 00:00
- cluster-glue-libs-1.0.6-1.6.el5.i386.rpm 100% 130KB 130.1KB/s 00:00
- corosync-1.2.7-1.1.el5.i386.rpm 100% 166KB 166.1KB/s 00:00
- corosynclib-1.2.7-1.1.el5.i386.rpm 100% 155KB 154.8KB/s 00:00
- drbd83-8.3.8-1.el5.centos.i386.rpm 100% 217KB 216.7KB/s 00:00
- heartbeat-3.0.3-2.3.el5.i386.rpm 100% 162KB 161.7KB/s 00:00
- heartbeat-libs-3.0.3-2.3.el5.i386.rpm 100% 283KB 282.8KB/s 00:00
- kmod-drbd83-8.3.8-1.el5.centos.i686.rpm 100% 123KB 123.0KB/s 00:00
- libesmtp-1.0.4-5.el5.i386.rpm 100% 59KB 59.0KB/s 00:00
- openais-1.1.3-1.6.el5.i386.rpm 100% 202KB 202.2KB/s 00:00
- openaislib-1.1.3-1.6.el5.i386.rpm 100% 92KB 92.4KB/s 00:00
- pacemaker-1.1.5-1.1.el5.i386.rpm 100% 778KB 778.1KB/s 00:00
- pacemaker-cts-1.1.5-1.1.el5.i386.rpm 100% 203KB 203.1KB/s 00:00
- pacemaker-libs-1.1.5-1.1.el5.i386.rpm 100% 324KB 324.2KB/s 00:00
- perl-TimeDate-1.16-5.el5.noarch.rpm 100% 32KB 32.1KB/s 00:00
- resource-agents-1.0.4-1.1.el5.i386.rpm 100% 380KB 379.5KB/s 00:00
- [root@node1 ha]# scp mysql-5.5.15-linux2.6-i686.tar.gz node2:/root/ha/
- mysql-5.5.15-linux2.6-i686.tar.gz 100% 155MB 10.3MB/s 00:15
1.5 配置本地yum数据库
- [root@node1 ha]#
- [root@node1 ha]# mkdir /mnt/cdrom/
- [root@node1 ha]# mount /dev/cdrom /mnt/cdrom/
- mount: block device /dev/cdrom is write-protected, mounting read-only
- [root@node1 ha]# yum list all
- [root@node1 ha]#
- [root@node1 ha]# scp /etc/yum.repos.d/server.repo node2:/etc/yum.repos.d/
- server.repo 100% 647 0.6KB/s 00:00
- [root@node1 ha]#
- [root@node1 ha]# ssh node2 'mkdir /mnt/cdrom/'
- [root@node1 ha]# ssh node2 'mount /dev/cdrom /mnt/cdrom/'
- [root@node1 ha]# ssh node2 'yum list all'
1.6 在node1上新增磁盘
- [root@node1 ha]# cd
- [root@node1 ~]# fdisk -l
- Disk /dev/sda: 21.4 GB, 21474836480 bytes
- 255 heads, 63 sectors/track, 2610 cylinders
- Units = cylinders of 16065 * 512 = 8225280 bytes
- Device Boot Start End Blocks Id System
- /dev/sda1 * 1 13 104391 83 Linux
- /dev/sda2 14 1318 10482412+ 83 Linux
- /dev/sda3 1319 1579 2096482+ 82 Linux swap / Solaris
- [root@node1 ~]# fdisk /dev/sda
- p/n/p//+1000M/p/w
- [root@node1 ~]# fdisk -l
- Disk /dev/sda: 21.4 GB, 21474836480 bytes
- 255 heads, 63 sectors/track, 2610 cylinders
- Units = cylinders of 16065 * 512 = 8225280 bytes
- Device Boot Start End Blocks Id System
- /dev/sda1 * 1 13 104391 83 Linux
- /dev/sda2 14 1318 10482412+ 83 Linux
- /dev/sda3 1319 1579 2096482+ 82 Linux swap / Solaris
- /dev/sda4 1580 1702 987997+ 83 Linux
- [root@node1 ~]# partprobe /dev/sda
- [root@node1 ~]# cat /proc/partitions
- major minor #blocks name
- 8 0 20971520 sda
- 8 1 104391 sda1
- 8 2 10482412 sda2
- 8 3 2096482 sda3
- 8 4 987997 sda4
- [root@node1 ~]#
1.7 在node2上新增磁盘
- [root@node2 ha]# cd
- [root@node2 ~]# fdisk -l
- Disk /dev/sda: 21.4 GB, 21474836480 bytes
- 255 heads, 63 sectors/track, 2610 cylinders
- Units = cylinders of 16065 * 512 = 8225280 bytes
- Device Boot Start End Blocks Id System
- /dev/sda1 * 1 13 104391 83 Linux
- /dev/sda2 14 1318 10482412+ 83 Linux
- /dev/sda3 1319 1579 2096482+ 82 Linux swap / Solaris
- [root@node2 ~]# fdisk /dev/sda
- p/n/p//+1000M/p/w
- [root@node2 ~]# fdisk -l
- Disk /dev/sda: 21.4 GB, 21474836480 bytes
- 255 heads, 63 sectors/track, 2610 cylinders
- Units = cylinders of 16065 * 512 = 8225280 bytes
- Device Boot Start End Blocks Id System
- /dev/sda1 * 1 13 104391 83 Linux
- /dev/sda2 14 1318 10482412+ 83 Linux
- /dev/sda3 1319 1579 2096482+ 82 Linux swap / Solaris
- /dev/sda4 1580 1702 987997+ 83 Linux
- [root@node2 ~]# partprobe /dev/sda
- [root@node2 ~]# cat /proc/partitions
- major minor #blocks name
- 8 0 20971520 sda
- 8 1 104391 sda1
- 8 2 10482412 sda2
- 8 3 2096482 sda3
- 8 4 987997 sda4
- [root@node2 ~]#
二、DRBD安装配置步骤
在node1和node2做以下操作:
我下载的软件包是:(我放在/root/ha/下了)
drbd83-8.3.8-1.el5.centos.i386.rpm
kmod-drbd83-8.3.8-1.el5.centos.i686.rpm
2.1、安装DRBD 套件
- [root@node1 ~]# cd ha/
- [root@node1 ha]# ls
- [root@node1 ha]# yum localinstall -y drbd83-8.3.8-1.el5.centos.i386.rpm kmod-drbd83-8.3.8-1.el5.centos.i686.rpm –nogpgcheck
- ...
- Installed:
- drbd83.i386 0:8.3.8-1.el5.centos kmod-drbd83.i686 0:8.3.8-1.el5.centos
- Complete!
- [root@node1 ha]# cd
- [root@node2 ~]# cd ha/
- [root@node2 ha]# ls
- [root@node2 ha]# yum localinstall -y drbd83-8.3.8-1.el5.centos.i386.rpm kmod-drbd83-8.3.8-1.el5.centos.i686.rpm –nogpgcheck
- ...
- Installed:
- drbd83.i386 0:8.3.8-1.el5.centos kmod-drbd83.i686 0:8.3.8-1.el5.centos
- Complete!
- [root@node2 ha]# cd
2.2、加载DRBD 模块
- [root@node1 ~]# modprobe drbd
- [root@node1 ~]# lsmod |grep drbd
- drbd 228528 0
- [root@node1 ~]#
- [root@node1 ~]# ssh node2 'modprobe drbd'
- [root@node1 ~]# ssh node2 'lsmod |grep drbd'
- drbd 228528 0
- [root@node1 ~]#
2.3、修改配置文件
drbd.conf配置文件DRBD运行时,会读取一个配置文件/etc/drbd.conf.这个文件里描述了DRBD设备与硬盘分区的映射关系
2.3.1 在node1上以下配置
- [root@node1 ~]# cp /usr/share/doc/drbd83-8.3.8/drbd.conf /etc/
- cp: overwrite `/etc/drbd.conf'? y
- [root@node1 ~]# cat /etc/drbd.conf
- # You can find an example in /usr/share/doc/drbd.../drbd.conf.example
- include "drbd.d/global_common.conf";
- include "drbd.d/*.res";
- [root@node1 ~]# cd /etc/drbd.d/
- [root@node1 drbd.d]# ll
- total 4
- -rwxr-xr-x 1 root root 1418 Jun 4 2010 global_common.conf
- [root@node1 drbd.d]# cp global_common.conf global_common.conf.bak
- #修改全局配置文件(说明略)
- [root@node1 drbd.d]# vim global_common.conf
- global {
- usage-count yes;
- }
- common {
- protocol C;
- handlers {
- pri-on-incon-degr "/usr/lib/drbd/notify-pri-on-incon-degr.sh; /usr/lib/drbd/notify-emergency-reboot.sh; echo b > /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; 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 100;
- }
- disk {
- on-io-error detach;
- }
- net {
- cram-hmac-alg "sha1";
- shared-secret "mydrbd123";
- }
- syncer {
- rate 100M;
- }
- }
- #修改资源配置文件(说明略)
- [root@node1 drbd.d]# vim /etc/drbd.d/mysql.res
- resource mysql {
- on node1.magedu.com {
- device /dev/drbd0;
- disk /dev/sda4;
- address 192.168.101.81:7898;
- meta-disk internal;
- }
- on node2.magedu.com {
- device /dev/drbd0;
- disk /dev/sda4;
- address 192.168.101.82:7898;
- meta-disk internal;
- }
- }
2.3.2 复制配置到node2上:
- [root@node1 drbd.d]# scp /etc/drbd.conf node2:/etc/
- drbd.conf 100% 133 0.1KB/s 00:00
- [root@node1 drbd.d]# scp /etc/drbd.d/* node2:/etc/drbd.d/
- global_common.conf 100% 682 0.7KB/s 00:00
- global_common.conf.bak 100% 1418 1.4KB/s 00:00
- mysql.res 100% 468 0.5KB/s 00:00
2.4、 检测配置文件, 创建nfs 的资源
//分别在node1和node2上初始化定义的mysql的资源
//检测配置文件(两次执行如下命令)
在node1上:
- [root@node1 drbd.d]# drbdadm adjust mysql
- --== Thank you for participating in the global usage survey ==--
- The server's response is:
- 0: Failure: (119) No valid meta-data signature found.
- ==> Use 'drbdadm create-md res' to initialize meta-data area. <==
- Command 'drbdsetup 0 disk /dev/sda4 /dev/sda4 internal --set-defaults --create-device --on-io-error=detach' terminated with exit code 10
- [root@node1 drbd.d]# drbdadm adjust mysql
- drbdsetup 0 show:5: delay-probe-volume 0k => 0k out of range [4..1048576]k.
- [root@node1 drbd.d]# drbdadm create-md mysql
- Writing meta data...
- initializing activity log
- NOT initialized bitmap
- New drbd meta data block successfully created.
- [root@node1 drbd.d]# ll /dev/drbd0
- brw-r----- 1 root disk 147, 0 Feb 7 20:44 /dev/drbd0
- 在node2上:
- [root@node2 ~]# drbdadm create-md mysql
- --== Thank you for participating in the global usage survey ==--
- The server's response is:
- Writing meta data...
- initializing activity log
- NOT initialized bitmap
- New drbd meta data block successfully created.
- [root@node2 ~]# ll /dev/drbd0
- brw-rw---- 1 root root 147, 0 Feb 7 20:47 /dev/drbd0
2.5 启动DRBD服务,查看DRBD状态
- [root@node1 drbd.d]# service drbd start
- Starting DRBD resources: [
- mysql
- Found valid meta data in the expected location, 1011703808 bytes into /dev/sda4.
- d(mysql) s(mysql) n(mysql) ]......
- [root@node2 ~]# service drbd start
- Starting DRBD resources: [
- mysql
- Found valid meta data in the expected location, 1011703808 bytes into /dev/sda4.
- d(mysql) s(mysql) n(mysql) ].
- [root@node1 drbd.d]# service drbd status
- drbd driver loaded OK; device status:
- version: 8.3.8 (api:88/proto:86-94)
- GIT-hash: d78846e52224fd00562f7c225bcc25b2d422321d build by mockbuild@builder10.centos.org, 2010-06-04 08:04:16
- m:res cs ro ds p mounted fstype
- 0:mysql Connected Secondary/Secondary Inconsistent/Inconsistent C
- [root@node1 drbd.d]# drbd-overview
- 0:mysql Connected Secondary/Secondary Inconsistent/Inconsistent C r----
- [root@node2 ~]# service drbd status
- drbd driver loaded OK; device status:
- version: 8.3.8 (api:88/proto:86-94)
- GIT-hash: d78846e52224fd00562f7c225bcc25b2d422321d build by mockbuild@builder10.centos.org, 2010-06-04 08:04:16
- m:res cs ro ds p mounted fstype
- 0:mysql Connected Secondary/Secondary Inconsistent/Inconsistent C
- [root@node2 ~]# drbd-overview
- 0:mysql Connected Secondary/Secondary Inconsistent/Inconsistent C r----
2.6 设置DRBD的主节点:
从上面的信息中可以看出此时两个节点均处于Secondary状态。于是,我们接下来需要将其中一个节点设置为Primary,这里将node1设置为主节点,故要在node1上执行如下命令:可以看到文件同步过程。
- [root@node1 drbd.d]# drbdadm -- --overwrite-data-of-peer primary mysql
- [root@node1 drbd.d]# drbd-overview
- 0:mysql SyncSource Primary/Secondary UpToDate/Inconsistent C r----
- [===>................] sync'ed: 23.6% (761048/987928)K delay_probe: 20
- [root@node1 drbd.d]# drbd-overview
- 0:mysql SyncSource Primary/Secondary UpToDate/Inconsistent C r----
- [========>...........] sync'ed: 47.6% (522296/987928)K delay_probe: 42
- [root@node1 drbd.d]#
- [root@node1 drbd.d]# drbd-overview
- 0:mysql Connected Primary/Secondary UpToDate/UpToDate C r----
- [root@node1 drbd.d]#
- [root@node1 drbd.d]# cat /proc/drbd
- version: 8.3.8 (api:88/proto:86-94)
- GIT-hash: d78846e52224fd00562f7c225bcc25b2d422321d build by mockbuild@builder10.centos.org, 2010-06-04 08:04:16
- 0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r----
- ns:987928 nr:0 dw:0 dr:987928 al:0 bm:61 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0
- [root@node1 drbd.d]#
- [root@node2 ~]# drbd-overview
- 0:mysql SyncTarget Secondary/Primary Inconsistent/UpToDate C r----
- [=====>..............] sync'ed: 32.7% (670680/987928)K queue_delay: 0.1 ms
- [root@node2 ~]# drbd-overview
- 0:mysql SyncTarget Secondary/Primary Inconsistent/UpToDate C r----
- [===========>........] sync'ed: 61.6% (384536/987928)K queue_delay: 11.6 ms
- [root@node2 ~]#
- [root@node2 ~]# drbd-overview
- 0:mysql Connected Secondary/Primary UpToDate/UpToDate C r----
- [root@node2 ~]#
- [root@node2 ~]# cat /proc/drbd
- version: 8.3.8 (api:88/proto:86-94)
- GIT-hash: d78846e52224fd00562f7c225bcc25b2d422321d build by mockbuild@builder10.centos.org, 2010-06-04 08:04:16
- 0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r----
- ns:0 nr:987928 dw:987928 dr:0 al:0 bm:61 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0
注:Primary/Secondary 说明当前节点为主节点;Secondary/Primary 说明当前节点为从节点。使用:watch -n 1 'cat /proc/drbd'查看同步过程!
2.7 创建文件系统(只可以在primary节点上进行,这里在node1上创建)
- [root@node1 drbd.d]# mkfs -t ext3 /dev/drbd0
- [root@node1 drbd.d]# mkdir -pv /mnt/mysqldata
- mkdir: created directory `/mnt/mysqldata'
- [root@node1 drbd.d]# ssh node2 'mkdir -pv /mnt/mysqldata'
- mkdir: created directory `/mnt/mysqldata'
- [root@node1 drbd.d]# mount /dev/drbd0 /mnt/mysqldata/
- [root@node1 drbd.d]#
- [root@node1 drbd.d]# cd /mnt/mysqldata/
- [root@node1 mysqldata]# ll
- total 16
- drwx------ 2 root root 16384 Feb 7 21:26 lost+found
- [root@node1 mysqldata]# echo "123" >f1
- [root@node1 mysqldata]# touch f2
- [root@node1 mysqldata]# ll
- total 20
- -rw-r--r-- 1 root root 4 Feb 7 21:28 f1
- -rw-r--r-- 1 root root 0 Feb 7 21:28 f2
- drwx------ 2 root root 16384 Feb 7 21:26 lost+found
- [root@node1 mysqldata]#
2.8将node2设置为primary节点
- [root@node1 mysqldata]# cd
- [root@node1 ~]# umount /mnt/mysqldata/
- [root@node1 ~]# drbdadm secondary mysql
- [root@node1 ~]# drbd-overview
- 0:mysql Connected Secondary/Secondary UpToDate/UpToDate C r----
- [root@node1 ~]#
- 将node2设置为primary节点
- [root@node2 ~]# drbd-overview
- 0:mysql Connected Secondary/Secondary UpToDate/UpToDate C r----
- [root@node2 ~]# drbdadm primary mysql
- [root@node2 ~]# drbd-overview
- 0:mysql Connected Primary/Secondary UpToDate/UpToDate C r----
- [root@node2 ~]# mount /dev/drbd0 /mnt/mysqldata/
- [root@node2 ~]# cd /mnt/mysqldata/
- [root@node2 mysqldata]# ll
- total 20
- -rw-r--r-- 1 root root 4 Feb 7 21:28 f1
- -rw-r--r-- 1 root root 0 Feb 7 21:28 f2
- drwx------ 2 root root 16384 Feb 7 21:26 lost+found
此处看到在node1上创建的文件在这里都显示了,
最后将node2的/mnt/mysqldata/卸载
[root@node2 mysqldata]# cd
[root@node2 ~]# umount /mnt/mysqldata/
至此DRBD配置成功!!!
转载于:https://blog.51cto.com/qcbetter/960688
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