corosync+pacemaker+drbd+mysql 实现mysql的高可用
拓扑如下:但是主从没有做配置,只做了主mysql的高可用
[root@node1 tools]#cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.1.166 node1.example.com node1 192.168.1.167 node2.example.com node2 [root@node1 tools]#yum install pacemaker corosync rpm-build -y [root@node1 tools]#rpm -ivh crmsh-1.2.6-4.el6.src.rpm [root@node1 tools]#rpm -ivh pssh-2.3.1-2.el6.src.rpm [root@node1 tools]# cd /root/rpmbuild/SPECS [root@node1 SPECS]#rpmbuild -bb crmsh.spec #根据提示进行安装所缺的rpm包 [root@node1 SPECS]#rpmbuild -bb pssh-CentOS_CentOS-6.spec #根据提示进行安装所缺的rpm包 在/root/rpmbuild/RPMS/x86_64下会生成相应的rpm包 [root@node1 SPECS]# yum install python-lxml cluster-glue-libs-devel pacemaker-libs-devel asciidoc autoconf automake libtool redhat-rpm-config -y [root@node1 SPECS]# yum install python-devel python-setuptools python-setuptools-devel -y [root@node1 SPECS]# cd /root/rpmbuild/RPMS/x86_64 [root@node1 SPECS]# scp scp crmsh-1.2.6-4.el6.x86_64.rpm pssh-2.3.1-2.el6.x86_64.rpm node1:/tools [root@node1 SPECS]# scp crmsh-1.2.6-4.el6.x86_64.rpm pssh-2.3.1-2.el6.x86_64.rpm node2:/tools [root@node1 tools] yum install --nogpgcheck localinstall pssh-2.3.1-2.el6.x86_64.rpm crmsh-1.2.6-4.el6.x86_64.rpm 创建DRBD的资源盘: [root@node1 ~]# pvcreate /dev/sdb1 [root@node1 ~]# vgcreate vg_data /dev/sdb1 [root@node1 ~]# lvcreate -L 5G -n lv_data vg_data node2做同样的操作
2.配置corosync
[root@node1 tools] cd /etc/corosync [root@node1 corosync] cp corosync.conf.example corosync.conf [root@node1 corosync] vim corosync.conf compatibility: whitetank # 兼容以前的版本 totem { # 心跳传递协议 version: 2 #版本 secauth: on #开启安全认证 threads: 0 #开启的线程,默认就好 # rrp_mode: passive #The Totem Redundant Ring Protocol,通过使用冗余把多个节点连接起来,可允许网络的损坏,有3个方式,active,passive,none,默认是none,active的方式是把所有消息发送到n个冗余的网络,每个消息都被接收n次,passive的方式是所有消息发送到n个冗余网络其中的一个,每个消息被接收1次。只要使用在多个心跳网络(充分保障心跳网络的健壮)。如果只有一个心跳网的话,不用配置,默认就是none interface { ringnumber: 0 #冗余环号 bindnetaddr: 172.16.0.0 #绑定心跳网段 mcastaddr: 226.94.1.1 #心跳组播地址 mcastport: 5405 #心跳组播端口 ttl: 1 #经过几个下一跳。 } # interface { # ringnumber: 1 # bindnetaddr: 192.168.1.0 # mcastaddr: 226.94.1.2 # mcastport: 5406 # ttl: 1 # } } logging { fileline: off #指定要打印的行 to_stderr: no #标准错误输出 to_logfile: yes #记录到文件 to_syslog: no #记录到syslog logfile: /var/log/cluster/corosync.log debug: off timestamp: on #是否打印时间戳 logger_subsys { subsys: AMF debug: off } } amf { mode: disabled } service { ver: 0 name: pacemaker #定义corosync启动时同时启动pacemaker } aisexec { user: root group: root }
[root@node1 corosync]#corosync-keygen #生成key,使用/dev/random生成随机数,这时可能需要敲击键盘,安装些包,卸载包来生成随机数 [root@node1 corosync]# scp corosync.conf authkey node2:/etc/corosync/ [root@node1 ~]#/etc/init.d/corosync start
[root@node1 ~]# grep -e "Corosync Cluster Engine" -e "configuration file" /var/log/cluster/corosync.log corosync [MAIN ] Corosync Cluster Engine (‘1.4.1‘): started and ready to provide service. corosync [MAIN ] Successfully read main configuration file ‘/etc/corosync/corosync.conf‘.
查看初始化成员节点通知是否正常发出:
[root@node1 ~]# grep TOTEM /var/log/cluster/corosync.log corosync [TOTEM ] Initializing transport (UDP/IP Multicast). corosync [TOTEM ] Initializing transmit/receive security: libtomcrypt SOBER128/SHA1HMAC (mode 0). corosync [TOTEM ] The network interface [172.16.0.11] is now up. corosync [TOTEM ] A processor joined or left the membership and a new membership was formed. corosync [TOTEM ] A processor joined or left the membership and a new membership was formed.
检查启动过程中是否有错误产生。下面的错误信息表示packmaker不久之后将不再作为corosync的插件运行,因此,建议使用cman作为集群基础架构服务;此处可安全忽略。
root@node1 ~]# grep ERROR: /var/log/cluster/corosync.log | grep -v unpack_resources Apr 02 21:55:08 corosync [pcmk ] ERROR: process_ais_conf: You have configured a cluster using the Pacemaker plugin for Corosync. The plugin is not supported in this environment and will be removed very soon. Apr 02 21:55:08 corosync [pcmk ] ERROR: process_ais_conf: Please see Chapter 8 of ‘Clusters from Scratch‘ (http://www.clusterlabs.org/doc) for details on using Pacemaker with CMAN
查看corosync的进程
[root@node1 ~]# ps auxf corosync \_ /usr/libexec/pacemaker/cib #集群信息基库 \_ /usr/libexec/pacemaker/stonithd #stonish \_ /usr/libexec/pacemaker/lrmd #ra需要本地代理 本地资源管理器 \_ /usr/libexec/pacemaker/attrd #管理集群资源属性 \_ /usr/libexec/pacemaker/pengine #策略引擎 \_ /usr/libexec/pacemaker/crmd #资源管理
查看当前ring的状态
[root@node1 corosync]# corosync-cfgtool -s Printing ring status. Local node ID 184553644 RING ID 0 id = 172.16.0.11 status = ring 0 active with no faults
node2 做同样的操作
CRM相关的检查:
[root@node1 corosync]# crm_verify -L -V #检查crm在语法配置文件上是否有错误,由于没有stonish设备,可能会报相关的错误。 [root@node1 corosync]# crm configure property stonith-enabled=false 在双节点集群中,由于票数是偶数,当心跳出现问题(脑裂)时,两个节点都将达不到法定票数,默认quorum策略会关闭集群服务,为了避免这种情况,配置quorum策略为【ignore】。 [root@node1 corosync]# crm configure property no-quorum-policy=ignore [root@node1 corosync]# crm configure show node node1.example.com node node2.example.com property $id="cib-bootstrap-options" dc-version="1.1.10-14.el6_5.2-368c726" cluster-infrastructure="classic openais (with plugin)" expected-quorum-votes="2" stonith-enabled="false" no-quorum-policy="ignore"
crm,可以进行交互式配置的。如下:
3.安装配置drbd
[root@node1 ~]# yum install kernel-2.6.32-358.23.2.el6.x86_64.rpm -y 最好验证下 grub里是否添加到了新内核,然后重启。 [root@node1 bak]# ls drbd-8.4.3-33.el6.x86_64.rpm drbd-kmdl-2.6.32-358.el6-8.4.3-33.el6.x86_64.rpm [root@node1 bak]# rpm -ivh drbd*
drbd配置文件:/etc/drbd.conf /etc/drbd.d/*
[root@node1 ~]#cat /etc/drbd.conf include "drbd.d/global_common.conf"; include "drbd.d/*.res";
B半同步:指的是数据已经写到磁盘上,并且这些数据已经发送到对方内存缓冲区,对方的tcp已经收到数据,并宣布写入
C同步:指的是主节点已写入,从节点磁盘也写入
[root@node1 ~]# vim /etc/drbd.d/global_common.conf gobal { usage-count no; #是否参加用户统计 } common { protocol C; #同步 handlers { #定义一系列处理器,用来回应特定事件 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 300;#该选项设定一个时间值,单位是秒。在启用DRBD块时,初始化脚本drbd会阻塞启动进程的运行,直到对等节点的出现。该选项就是用来限制这个等待时间的,默认为0,即不限制,永远等待。 degr-wfc-timeout 300; #该选项也设定一个时间值,单位为秒。也是用于限制等待时间,只是作用的情形不同:它作用于一个降级集群(即那些只剩下一个节点的集群)在重启时的等待时间。 } disk { on-io-error detach;#当发生I/O错误,detach,以diskless mode继续工作。 } net { cram-hmac-alg "sha1"; shared-secret "mydrbd"; } syncer { rate 1000M; } }
[root@node1 ~]# vim /etc/drbd.d/mydata.res resource mydata { on node1.example.com { device /dev/drbd0; disk /dev/vg_data/lv_data; address 10.1.1.11:7789; meta-disk internal; } on node2.example.com { device /dev/drbd0; disk /dev/vg_data/lv_data; address 10.1.1.12:7789; meta-disk internal; } }
两个配置文件,两个节点要相同
[root@node1 ~]#drbdadm create-md mydata#2个节点都运行 Writing meta data... initializing activity log NOT initializing bitmap lk_bdev_save(/var/lib/drbd/drbd-minor-0.lkbd) failed: No such file or directory New drbd meta data block successfully created. lk_bdev_save(/var/lib/drbd/drbd-minor-0.lkbd) failed: No such file or directory [root@node1 ~]# /etc/init.d/drbd start #2个节点都运行 [root@node1 ~]# drbdadm primary --force mydata #只在节点1运行 [root@node1 drbd.d]# drbd-overview 0:mydata/0 Connected Primary/Secondary UpToDate/UpToDate C r----- [root@node1 drbd.d]#mkfs.ext4 /dev/drbd0 [root@node1 drbd.d]#mount /dev/drbd0 /mnt [root@node1 drbd.d]#cp /etc/passwd /mnt [root@node1 drbd.d]#umount /mnt [root@node1 drbd.d]#drbdadm secondary mydata [root@node1 ~]# drbd-overview 0:mydata/0 Connected Secondary/Secondary UpToDate/UpToDate C r----- 在node2进行测试 [root@node2 ~]#drbdadm primary mydata [root@node2 ~]#mount /dev/drbd0 /mnt [root@node2 ~]# ls /mnt lost+found passwd #发现了passwd,并开验证下。 [root@node2 ~]# drbd-overview 0:mydata/0 Connected Primary/Secondary UpToDate/UpToDate C r----- /mnt ext4 5.0G 138M 4.6G 3%
然后反过来再测一遍,没有问题的话就说明drbd 配置成功了。
[root@node2 ~]# umont /mnt 关闭2个节点的drbd,并确定开机不自动启动 [root@node1 ~]#/etc/init.d/drbd stop [root@node1 ~]#chkconfig drbd off
4.配置drbd的资源
[root@node1 ~]# crm conf crm(live)configure# primitive mysql_drbd ocf:linbit:drbd params drbd_resource=mydata op monitor role=Master interval=10 timeout=20 op monitor role=Slave interval=20 timeout=20 op start timeout=240 op stop timeout=100 on-fail=restart crm(live)configure# ms ms_mysql_drbd mysql_drbd meta master-max=1 master-node-max=1 clone-max=2 clone-node-max=1 notify=true crm(live)configure# verify crm(live)configure# commit crm(live)configure# cd crm(live)# status Last updated: Thu Apr 3 01:11:31 2014 Last change: Thu Apr 3 01:11:23 2014 via cibadmin on node1.example.com Stack: classic openais (with plugin) Current DC: node2.example.com - partition with quorum Version: 1.1.10-14.el6_5.2-368c726 2 Nodes configured, 2 expected votes 2 Resources configured Online: [ node1.example.com node2.example.com ] Master/Slave Set: ms_mysql_drbd [mysql_drbd] Masters: [ node2.example.com ] Slaves: [ node1.example.com ]
验证drbd:
root@node1 drbd.d]# drbd-overview 0:mydata/0 Connected Secondary/Primary UpToDate/UpToDate C r----- 做下测试: [root@node2 ~]# crm crm(live)# node crm(live)node# standby [root@node2 ~]# crm status Node node2.example.com: standby Online: [ node1.example.com ] Master/Slave Set: ms_mysql_drbd [mysql_drbd] Masters: [ node1.example.com ] Stopped: [ node2.example.com ] [root@node1 ~]# drbd-overview 0:mydata/0 WFConnection Primary/Unknown UpToDate/DUnknown C r----- [root@node2 ~]# crm node online [root@node2 ~]# crm status Online: [ node1.example.com node2.example.com ] Master/Slave Set: ms_mysql_drbd [mysql_drbd] Masters: [ node1.example.com ] Slaves: [ node2.example.com ] [root@node2 ~]# drbd-overview 0:mydata/0 Connected Secondary/Primary UpToDate/UpToDate C r-----
现在DRBD资源已经添加成功,现在把它创建成文件系统,并自动挂载到master上的mydata 目录下。
[root@node1 ~]# mkdir /mydata #node2 也创建 [root@node1 ~]# crm conf crm(live)configure# primitive mystore ocf:heartbeat:Filesystem params device=/dev/drbd0 directory=/mydata op monitor interval=20 timeout=40 op start timeout=60 op stop timeout=60 on-fail=restart crm(live)configure# verify crm(live)configure#colocation mystore_with_ms-mysql-drbd inf: mystore ms_mysql_drbd:Master crm(live)configure# order ms-mysql-drbd_before_mystore inf: ms_mysql_drbd:promote mystore:start crm(live)configure# commit crm(live)configure# cd crm(live)# status Last updated: Thu Apr 3 01:49:23 2014 Last change: Thu Apr 3 01:48:40 2014 via cibadmin on node1.example.com Stack: classic openais (with plugin) Current DC: node2.example.com - partition with quorum Version: 1.1.10-14.el6_5.2-368c726 2 Nodes configured, 2 expected votes 3 Resources configured Online: [ node1.example.com node2.example.com ] Master/Slave Set: ms_mysql_drbd [mysql_drbd] Masters: [ node1.example.com ] Slaves: [ node2.example.com ] mystore (ocf::heartbeat:Filesystem): Started node1.example.com
以上看到drbd资源和文件系统资源已经配置成功。
5.安装mysql
[root@node2 ~]# yum install bison gcc gcc-c++ autoconf automake ncurses-devel cmake -y [root@node2 ~]#groupadd -r mysql [root@node2 ~]#useradd -g mysql -r -d /mydata/data mysql [root@node2 ~]#cmake . -DCMAKE_INSTALL_PREFIX=/usr/local/mysql -DMYSQL_DATADIR=/data/mydata -DSYSCONFDIR=/etc -DWITH_INNOBASE_STORAGE=1 -DWITH_ARCHIVE_STORAGE=1 -DWITH_BLACKHOLE_STORAGE=1 -DWITH_READLINE=1 -DWITH_SSL=system -DWITH_ZLIB=system -DWITH_LIBWRAP=0 -DMYSQL_UNIX_ADDR=/tmp/mysql.sock -DDEFAULT_CHARSET=utf8 -DDEFAULT_COLLATION=utf8_general_ci make && make install
这个是参考,我偷懒了,从别的机器上把mysql打包过来的
[root@node2 local]#tar -zxvf mysql.tar.gz [root@node2 local]#cd mysql [root@node2 mysql]#cp supports-file/my-large.cnf /etc/my.cnf [root@node2 mysql]#cp supports-file/mysql.server /etc/rc.d/init.d/mysqld [root@node2 mysql]#scripts/mysql_install_db --user=mysql --datadir=/data/mydata/ [root@node2 mysql]#chmod a+x /etc/rc.d/init.d/mysqld [root@node2 mysql]#vim /etc/my.cnf datadir=/data/mydata [root@node2 mysql]# chkconfig --add mysqld [root@node2 mysql]# chkconfig mysqld off [root@node2 mysql]# /etc/init.d/mysqld start
[root@node1 local]# useradd -r -u 306 mysql [root@node1 local]#tar -zxvf mysql.tar.gz [root@node1 local]#cd mysql [root@node1 mysql]#cp supports-file/my-large.cnf /etc/my.cnf [root@node1 mysql]#cp supports-file/mysql.server /etc/rc.d/init.d/mysqld [root@node1 mysql]#chmod a+x /etc/rc.d/init.d/mysqld [root@node1 mysql]#vim /etc/my.cnf datadir=/data/mydata [root@node1 mysql]# chkconfig --add mysqld [root@node1 mysql]# chkconfig mysqld off [root@node1 mysql]# /etc/init.d/mysqld star
能启动成功说明mysql安装完成。
6.配置mysql服务资源
[root@node1 mysql]# crm conf crm(live)configure# primitive vip ocf:heartbeat:IPaddr2 params ip="192.168.1.161" nic="eth0" op monitor interval="20" timeout="20" on-fail="restart" crm(live)configure# primitive myserver lsb:mysqld crm(live)configure# group mysql vip mystore myserver crm(live)configure# order vip-mystore_before_myserver inf: (vip mystore) myserver crm(live)configure#verify crm(live)configure#commit
[root@node1 mysql]# crm node standby
进行网络故障测试,ifdown eth0,也是可以发生切换的,可惜的是mysql脚本也应该用ocf的,但是我测试时,使用ocf脚本不成功,没办法才选了lsb,这也许是这次试验的不足吧。
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