corosync+pacemaker+mysql+drbd 实现mysql的高可用
corosync+pacemaker+mysql+drbd 实现mysql的高可用
====================================
一、了解各组件是什么以及之间的关系
二、安装高可用集群的提前
三、安装corosync+pacemaker
四、编译安装mysql
五、安装drbd
六、mysql与drbd实现mysql数据的镜像
七、利用crmsh配置mysql的高可用
====================================
环境：
OS：Centos 6.x(redhat 6.x)
kernel:2.6.32-358.el6.x86_64
yum源:
[centos] name=sohu-centos baseurl=http://mirrors.sohu.com/centos/$releasever/os/$basearch gpgcheck=1 enable=0 gpgkey=http://mirrors.sohu.com/centos/RPM-GPG-KEY-CentOS-6 [epel] name=sohu-epel baseurl=http://mirrors.sohu.com/fedora-epel/$releasever/$basearch/ enable=1 gpgcheck=0
拓扑图：
部分软件以附件的形式上传，mysql的源码包软件，网上很容易找
望各位博友带着下面的疑问去实现corosync+pacemaker+mysql+drbd mysql的高可用？
1、corosync是什么？pacemaker是什么？corosync与pacemaker的关系？
2、 mysql与drbd之间的连接关系？
3、 corosync、pacemaker、mysql、drbd之间的关系？
4、提到高可用集群，广大博友们就会想到，高可用集群中资源之间是如何建立关系？各个节点会不会抢占资源使其出现脑裂(split-brain)？
出现脑裂可以有fence设备自行解决
一、了解各组件是什么以及之间的关系
corosync：corosync的由来是源于一个Openais的项目，是Openais的一个子 项目，可以实现HA心跳信息传输的功能，是众多实现HA集群软件中之一，heartbeat与corosync是流行的Messaging Layer （集群信息层）工具。而corosync是一个新兴的软件，相比Heartbeat这款很老很成熟的软件，corosync与Heartbeat各有优势，博主就不在这里比较之间的优势了，corosync相对于Heartbeat只能说现在比较流行。
pacemaker：是众多集群资源管理器(Cluster Resource Manager)CRM中的一个，其主要功能是管理来着集群信息层发送来的信息。Pacemaker是集群的核心,它管理集群和集群信息. 集群信息更新通过Corosync通知到各个节点.
常见的CRM有:
heartbeat v1-->haresources
hearbeat v2--->crm
hearbeat v3---->pacemaker
RHCS(cman)----->rgmanager
如下图corosync与pacemaker之间的关系：
mysql：一个开源的关系型数据库
drbd：DRBD:(distributed replication block device)即分布式复制块设备。它的工作原理是：在A主机上有对指定磁盘设备写请求时，数据发送给A主机的kernel，然后通kernel中的一个模块，把相同的数据传送给B主机的kernel中一份，然后B主机再写入自己指定的磁盘设备，从而实现两主机数据的同步,也就实现了写操作高可用。类似于raid1一样，实现数据的镜像，DRBD一般是一主一从，并且所有的读写操作，挂载只能在主节点服务器上进行，，但是主从DRBD服务器之间是可以进行调换的。
各个组件之间的关系：其实mysql与drbd根本没有半毛钱的关系，而drbd与mysql相结合就有很重要的作用了，因为drbd实现数据的镜像，当drbd的主节点挂了之后，drbd的辅助节点还可以提供服务，但是主节点不会主动的切换到辅助的节点上面去，于是乎，高可用集群就派上用场了，因为资源定义为高可用的资源，主节点出现故障之后，高可用集群可以自动的切换到辅助节点上去，实现故障转移继续提供服务。
二、安装高可用集群的提前准备
1）、hosts文件
#把主机名改成jie2.com
[root@jie2 ~]# sed -i s/`grep HOSTNAME /etc/sysconfig/network |awk -F '=' '{print $2}'`/jie2.com/g /etc/sysconfig/network
#把主机名改成jie3.com
[root@jie3 ~]# sed -i s/`grep HOSTNAME /etc/sysconfig/network |awk -F '=' '{print $2}'`/jie3.com/g /etc/sysconfig/network
[root@jie2 ~]# cat >>/etc/hosts << EOF
>172.16.22.2 jie2.com jie2
>172.16.22.3 jie3.com jie3
>EOF
[root@jie3 ~]# cat >>/etc/hosts << EOF
>172.16.22.2 jie2.com jie2
>172.16.22.3 jie3.com jie3
>EOF
2）、ssh互信
[root@jie2 ~]# ssh-keygen -t rsa -P '' [root@jie2 ~]# ssh-copy-id -i .ssh/id_rsa.pub jie3 [root@jie3 ~]# ssh-keygen -t rsa -P '' [root@jie3 ~]# ssh-copy-id -i .ssh/id_rsa.pub jie2
3）、关闭NetworkManger
[root@jie2 ~]# chkconfig --del NetworkManager [root@jie2 ~]# chkconfig NetworkManager off [root@jie2 ~]# service NetworkManager stop [root@jie3 ~]# chkconfig --del NetworkManager [root@jie3 ~]# chkconfig NetworkManager off [root@jie3 ~]# service NetworkManager stop
4）、时间同步(博主用的是自己的ntp时间服务器)
[root@jie2 ~]#ntpdate 172.16.0.1 [root@jie3 ~]#ntpdate 172.16.0.1
三、安装corosync+pacemaker
1）、安装corosync+pacemaker
#节点jie2.com的操作
[root@jie2 ~]# yum -y install corosync pacemaker
[root@jie2 ~]# yum -y --nogpgcheck install crmsh-1.2.6-4.el6.x86_64.rpm pssh-2.3.1-2.el6.x86_64.rpm #提供crmsh命令接口的软件
#节点jie3.com的操作
[root@jie3 ~]# yum -y install corosync pacemaker
[root@jie3 ~]# yum -y --nogpgcheck install crmsh-1.2.6-4.el6.x86_64.rpm pssh-2.3.1-2.el6.x86_64.rpm
2）、修改配置文件和生成认证文件
配置文件
#节点jie2.com的操作
[root@jie2 ~]# cd /etc/corosync/
[root@jie2 corosync]# mv corosync.conf.example corosync.conf
[root@jie2 corosync]# vim corosync.conf
# Please read the corosync.conf.5 manual page
compatibility: whitetank
totem { #心跳信息传递层
version: 2 #版本
secauth: on #认证信息 一般on
threads: 0 #线程
interface { #定义心跳信息传递的接口
ringnumber: 0
bindnetaddr: 172.16.0.0 #绑定的网络地址，写网络地址
mcastaddr: 226.94.1.1 #多播地址
mcastport: 5405 #多播的端口
ttl: 1 #生存周期
}
}
logging { #日志
fileline: off
to_stderr: no #是否输出在屏幕上
to_logfile: yes #定义自己的日志
to_syslog: no #是否由syslog记录日志
logfile: /var/log/cluster/corosync.log #日志文件的存放路径
debug: off
timestamp: on #时间戳是否关闭
logger_subsys {
subsys: AMF
debug: off
}
}
amf {
mode: disabled
}
service {
ver: 0
name: pacemaker #pacemaker作为corosync的插件进行工作
}
aisexec {
user: root
group: root
}
[root@jie2 corosync]# scp corosync.conf jie3:/etc/corosync/
##把节点jie2.com的配置文件copy到jie3.com中
认证文件
#节点jie2.com的操作
[root@jie2 corosync]# corosync-keygen
Corosync Cluster Engine Authentication key generator.
Gathering 1024 bits for key from /dev/random.
Press keys on your keyboard to generate entropy (bits = 152).
#遇到这个情况，表示电脑的随机数不够，各位朋友可以不停的随便敲键盘，或者安装软件也可以生成随机数
[root@jie2 corosync]# scp authkey jie3:/etc/corosync/
#把认证文件也复制到jie3.com主机上
3）、开启服务和查看集群中的节点信息
#节点jie2.com的操作
[root@jie2 ~]# service corosync start
Starting Corosync Cluster Engine (corosync): [ OK ]
[root@jie2 ~]# crm status
Last updated: Thu Aug 8 14:43:13 2013
Last change: Sun Sep 1 16:41:18 2013 via crm_attribute on jie3.com
Stack: classic openais (with plugin)
Current DC: jie3.com - partition with quorum
Version: 1.1.8-7.el6-394e906
2 Nodes configured, 2 expected votes
Online: [ jie2.com jie3.com ]
#节点jie3.com的操作
[root@jie3 ~]# service corosync start
Starting Corosync Cluster Engine (corosync): [ OK ]
[root@jie3 ~]# crm status
Last updated: Thu Aug 8 14:43:13 2013
Last change: Sun Sep 1 16:41:18 2013 via crm_attribute on jie3.com
Stack: classic openais (with plugin)
Current DC: jie3.com - partition with quorum
Version: 1.1.8-7.el6-394e906
2 Nodes configured, 2 expected votes
Online: [ jie2.com jie3.com ]
四、编译安装mysql(两个节点的操作过程都是一样)
#节点jie2.com的操作 #1)、解压编译安装 [root@jie2 ~]# tar xf mysql-5.5.33.tar.gz [root@jie2 ~]# yum -y groupinstall "Development tools" "Server Platform Development" [root@jie2 ~]# cd mysql-5.5.33 [root@jie2 mysql-5.5.33]# yum -y install cmake [root@jie2 mysql-5.5.33]# cmake . -DCMAKE_INSTALL_PREFIX=/usr/local/mysql \ -DMYSQL_DATADIR=/mydata/data -DSYSCONFDIR=/etc \ -DWITH_INNOBASE_STORAGE_ENGINE=1 -DWITH_ARCHIVE_STORAGE_ENGINE=1 \ -DWITH_BLACKHOLE_STORAGE_ENGINE=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 [root@jie2 mysql-5.5.33]# make && make install #2)、建立配置文件和脚本文件 [root@jie2 mysql-5.5.33]# cp /usr/local/mysql/support-files/my-large.cnf /etc/my.cnf [root@jie2 mysql-5.5.33]# cp /usr/local/mysql/support-files/mysql.server /etc/rc.d/init.d/mysqld [root@jie2 mysql-5.5.33]# cd /usr/local/mysql/ [root@jie2 mysql]# useradd -r -u 306 mysql [root@jie2 mysql]# chown -R root:mysql ./* #3)、关联系统识别的路径 [root@jie2 mysql]#echo "PATH=/usr/local/mysql/bin:$PATH" >/etc/profile.d/mysqld.sh [root@jie2 mysql]#source /etc/profile.d/mysqld.sh [root@jie2 mysql]#echo "/usr/local/mysql/lib" >/etc/ld.so.conf.d/mysqld.conf [root@jie2 mysql]#ldconfig -v | grep mysql [root@jie2 mysql]#ln -sv /usr/local/mysql/include/ /usr/local/mysqld
先别初始化数据库，安装drbd把drbd挂载到目录下，然后初始化数据库把数据库的数据存放到drbd挂载的目录。
五、安装drbd
安装rpm包的drbd软件必须保证找相同内核版本的drbd-kmdl软件
1）、先划分一个分区，此分区做成drbd镜像(RHEL 6.x的重新格式化一个新的分区之后要重启系统）
#节点jie2.com的操作
[root@jie2 ~]# fdisk /dev/sda
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 3
First cylinder (7859-15665, default 7859):
Using default value 7859
Last cylinder, +cylinders or +size{K,M,G} (7859-15665, default 15665): +5G
Command (m for help): w
#节点jie3.com的操作
[root@jie3 ~]# fdisk /dev/sda
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 3
First cylinder (7859-15665, default 7859):
Using default value 7859
Last cylinder, +cylinders or +size{K,M,G} (7859-15665, default 15665): +5G
Command (m for help): w
2）、安装drbd和修改配置文件
#1)、安装drbd
#节点jie2.com的操作
[root@jie2 ~]# rpm -ivh drbd-kmdl-2.6.32-358.el6-8.4.3-33.el6.x86_64.rpm
warning: drbd-kmdl-2.6.32-358.el6-8.4.3-33.el6.x86_64.rpm: Header V4 DSA/SHA1 Signature, key ID 66534c2b: NOKEY
Preparing... ################################# [100%]
[root@jie2 ~]# rpm -ivh drbd-8.4.3-33.el6.x86_64.rpm
warning: drbd-8.4.3-33.el6.x86_64.rpm: Header V4 DSA/SHA1 Signature, key ID 66534c2b: NOKEY
Preparing... ################################## [100%]
#节点jie3.com的操作
[root@jie3 ~]# rpm -ivh drbd-kmdl-2.6.32-358.el6-8.4.3-33.el6.x86_64.rpm
warning: drbd-kmdl-2.6.32-358.el6-8.4.3-33.el6.x86_64.rpm: Header V4 DSA/SHA1 Signature, key ID 66534c2b: NOKEY
Preparing... ################################# [100%]
[root@jie3 ~]# rpm -ivh drbd-8.4.3-33.el6.x86_64.rpm
warning: drbd-8.4.3-33.el6.x86_64.rpm: Header V4 DSA/SHA1 Signature, key ID 66534c2b: NOKEY
Preparing... ################################## [100%]
#2)、修改drbd的配置文件
#节点jie2.com的操作
[root@jie2 ~]# cd /etc/drbd.d/
[root@jie2 drbd.d]# cat global_common.conf #全局配置文件
global {
usage-count no;
# minor-count dialog-refresh disable-ip-verification
}
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";
# fence-peer "/usr/lib/drbd/crm-fence-peer.sh";
# split-brain "/usr/lib/drbd/notify-split-brain.sh root";
# out-of-sync "/usr/lib/drbd/notify-out-of-sync.sh root";
# before-resync-target "/usr/lib/drbd/snapshot-resync-target-lvm.sh -p 15 -- -c 16k";
# after-resync-target /usr/lib/drbd/unsnapshot-resync-target-lvm.sh;
}
startup {
#wfc-timeout 120;
#degr-wfc-timeout 120;
}
disk {
on-io-error detach;
#fencing resource-only;
}
net {
cram-hmac-alg "sha1";
shared-secret "mydrbdlab";
}
syncer {
rate 1000M;
}
}
[root@jie2 drbd.d]# cat mydata.res #资源配置文件
resource mydata {
on jie2.com {
device /dev/drbd0;
disk /dev/sda3;
address 172.16.22.2:7789;
meta-disk internal;
}
on jie3.com {
device /dev/drbd0;
disk /dev/sda3;
address 172.16.22.3:7789;
meta-disk internal;
}
}
#把配置文件copy到节点jie3.com上面
[root@jie2 drbd.d]# scp global_common.conf mydata.res jie3:/etc/drbd.d/
3）、初始化drbd的资源并启动
#节点jie2.com的操作
#创建drbd的资源
[root@jie2 ~]# drbdadm create-md mydata
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. #提示已经创建成功
lk_bdev_save(/var/lib/drbd/drbd-minor-0.lkbd) failed: No such file or directory
#启动服务
[root@jie2 ~]# service drbd start
Starting DRBD resources: [
create res: mydata
prepare disk: mydata
adjust disk: mydata
adjust net: mydata
]
.......... [ok]
#节点jie3.com的操作
#创建drbd的资源
[root@jie3 ~]# drbdadm create-md mydata
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. #提示已经创建成功
lk_bdev_save(/var/lib/drbd/drbd-minor-0.lkbd) failed: No such file or directory
#启动服务
[root@jie3 ~]# service drbd start
Starting DRBD resources: [
create res: mydata
prepare disk: mydata
adjust disk: mydata
adjust net: mydata
]
.......... [ok]
4）、设置一个主节点，然后同步drbd的数据(此步骤只需在一个节点上操作)
#设置jie2.com为drbd的主节点
[root@jie2 ~]# drbdadm primary --force mydata
[root@jie2 ~]# cat /proc/drbd #查看同步进度
version: 8.4.3 (api:1/proto:86-101)
GIT-hash: 89a294209144b68adb3ee85a73221f964d3ee515 build by gardner@, 2013-05-27 04:30:21
0: cs:SyncSource ro:Primary/Secondary ds:UpToDate/Inconsistent C r---n-
ns:1897624 nr:0 dw:0 dr:1901216 al:0 bm:115 lo:0 pe:3 ua:3 ap:0 ep:1 wo:f oos:207988
[=================>..] sync'ed: 90.3% (207988/2103412)K
finish: 0:00:07 speed: 26,792 (27,076) K/sec
[root@jie2 ~]# watch -n1 'cat /proc/drbd' 此命令可以动态的查看
[root@jie2 ~]# cat /proc/drbd
version: 8.4.3 (api:1/proto:86-101)
GIT-hash: 89a294209144b68adb3ee85a73221f964d3ee515 build by gardner@, 2013-05-27 04:30:21
0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r-----
ns:120 nr:354 dw:435 dr:5805 al:6 bm:9 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0 #当两边都为UpToDate时，表示两边已经同步
5）、格式化drdb分区(此步骤在主节点上操作)
[root@jie2 ~]# mke2fs -t ext4 /dev/drbd0
六、mysql与drbd实现mysql数据的镜像
1）、在drbd的主节点上，挂载drbd的分区，然后初始化数据库
[root@jie2 ~]# mkdir /mydata #创建用于挂载drbd的目录
[root@jie2 ~]# mount /dev/drbd0 /mydata/
[root@jie2 ~]# mkdir /mydata/data
[root@jie2 ~]#chown -R mysql.mysql /mydata #把文件的属主和属组改成mysql
[root@jie2 ~]#vim /etc/my.cnf #修改mysql的配置文件
datadir = /mydata/data
innodb_file_per_table =1
[root@jie2 ~]#/usr/local/mysql/scripts/mysql_install_db --user=mysql --datadir=/mydata/data/ --basedir=/usr/local/mysql #初始化数据库
[root@jie2 ~]# service mysqld start
Starting MySQL ....... [ OK ]
2）、验证drbd是否镜像
#节点jie2.com的操作
#1)、先在drbd的主节点上面创建一个数据库
[root@jie2 ~]# mysql
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
4 rows in set (0.00 sec)
mysql> create database jie2;
Query OK, 1 row affected (0.01 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| jie2 |
| mysql |
| performance_schema |
| test |
+--------------------+
5 rows in set (0.00 sec)
mysql>\q
#2)、停掉mysql服务，卸载drbd挂载的目录
[root@jie2 ~]# service mysqld stop
[root@jie2 ~]# umount /dev/drbd0 #卸载drbd的挂载点
[root@jie2 ~]# drbdadm secondary mydata #把此节点改为drbd的备用节点
#节点jie3.com的操作
#3）、把jie3.com变为drbd的主节点
[root@jie3 ~]#drbdadm primary mydata #把此节点改为drbd的主节点
[root@jie3 ~]# mkdir /mydata
[root@jie3 ~]#chown -R mysql.mysql /mydata
[root@jie3 ~]#mount /dev/drdb0 /mydata
[root@jie3 ~]#vim /etc/my.cnf
datadir = /mydata/data
innodb_file_per_table = 1
[root@jie3 ~]# service mysqld start #此节点上不用初始化数据库，直接开启服务即可
Starting MySQL ....... [ OK ]
[root@jie3 ~]# mysql
mysql> show databases; #可以看见jie2数据库
+--------------------+
| Database |
+--------------------+
| information_schema |
| jie2 |
| mysql |
| performance_schema |
| test |
+--------------------+
5 rows in set (0.00 sec)
七、利用crmsh配置mysql的高可用
需要定义集群资源而mysql、drbd都是集群的资源，由集群管理的资源开机是一定不能够自行启动的。
1）、关闭drbd的服务和关闭mysql的服务
[root@jie2 ~]#service mysqld stop [root@jie2 ~]#service drbd stop [root@jie3 ~]#service mysqld stop [root@jie3 ~]#umount /dev/drbd0 #之前drbd已经挂载到jie3.com节点上了 [root@jie3 ~]#service drdb stop
2）、定义集群资源
定义drbd的资源(提供drbd的资源代理RA由OCF类别中的linbit提供）
[root@jie2 ~]# crm crm(live)# configure crm(live)configure# property stonith-enabled=false crm(live)configure# property no-quorum-policy=ignore crm(live)configure# primitive mysqldrbd 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 crm(live)configure#verify #可以检查语法
定义drbd的主从资源
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# verify
定义文件系统资源和约束关系
crm(live)configure# primitive mystore ocf:heartbeat:Filesystem params device="/dev/drbd0" directory="/mydata" fstype="ext4" op monitor interval=40 timeout=40 op start timeout=60 op stop timeout=60 crm(live)configure# verify crm(live)configure# colocation mystore_with_ms_mysqldrbd inf: mystore ms_mysqldrbd:Master crm(live)configure# order ms_mysqldrbd_before_mystore mandatory: ms_mysqldrbd:promote mystore:start crm(live)configure# verify
定义vip资源、mysql服务的资源约束关系
crm(live)configure# primitive myvip ocf:heartbeat:IPaddr params ip="172.16.22.100" op monitor interval=20 timeout=20 on-fail=restart crm(live)configure# primitive myserver lsb:mysqld op monitor interval=20 timeout=20 on-fail=restart crm(live)configure# verify crm(live)configure# colocation myserver_with_mystore inf: myserver mystore crm(live)configure# order mystore_before_myserver mandatory: mystore:start myserver:start crm(live)configure# verify crm(live)configure# colocation myvip_with_myserver inf: myvip myserver crm(live)configure# order myvip_before_myserver mandatory: myvip myserver crm(live)configure# verify crm(live)configure# commit
查看所有定义资源的信息
crm(live)configure# show
node jie2.com \
attributes standby="off"
node jie3.com \
attributes standby="off"
primitive myserver lsb:mysqld \
op monitor interval="20" timeout="20" on-fail="restart"
primitive mysqldrbd 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" interval="0" \
op stop timeout="100" interval="0"
primitive mystore ocf:heartbeat:Filesystem \
params device="/dev/drbd0" directory="/mydata" fstype="ext4" \
op monitor interval="40" timeout="40" \
op start timeout="60" interval="0" \
op stop timeout="60" interval="0"
primitive myvip ocf:heartbeat:IPaddr \
params ip="172.16.22.100" \
op monitor interval="20" timeout="20" on-fail="restart" \
meta target-role="Started"
ms ms_mysqldrbd mysqldrbd \
meta master-max="1" master-node-max="1" clone-max="2" clone-node-max="1" notify="true"
colocation myserver_with_mystore inf: myserver mystore
colocation mystore_with_ms_mysqldrbd inf: mystore ms_mysqldrbd:Master
colocation myvip_with_myserver inf: myvip myserver
order ms_mysqldrbd_before_mystore inf: ms_mysqldrbd:promote mystore:start
order mystore_before_myserver inf: mystore:start myserver:start
order myvip_before_myserver inf: myvip myserver
property $id="cib-bootstrap-options" \
dc-version="1.1.8-7.el6-394e906" \
cluster-infrastructure="classic openais (with plugin)" \
expected-quorum-votes="2" \
stonith-enabled="false" \
no-quorum-policy="ignore"
查看资源运行的状态运行在jie3.com上
[root@jie2 ~]# crm status
Last updated: Thu Aug 8 17:55:30 2013
Last change: Sun Sep 1 16:41:18 2013 via crm_attribute on jie3.com
Stack: classic openais (with plugin)
Current DC: jie3.com - partition with quorum
Version: 1.1.8-7.el6-394e906
2 Nodes configured, 2 expected votes
5 Resources configured.
Online: [ jie2.com jie3.com ]
Master/Slave Set: ms_mysqldrbd [mysqldrbd]
Masters: [ jie3.com ]
Slaves: [ jie2.com ]
mystore (ocf::heartbeat:Filesystem): Started jie3.com
myvip (ocf::heartbeat:IPaddr): Started jie3.com
myserver (lsb:mysqld): Started jie3.com
切换节点，看资源是否转移
[root@jie3 ~]# crm node standby jie3.com #把此节点设置为备用节点
[root@jie3 ~]# crm status
Last updated: Mon Sep 2 01:45:07 2013
Last change: Mon Sep 2 01:44:59 2013 via crm_attribute on jie3.com
Stack: classic openais (with plugin)
Current DC: jie3.com - partition with quorum
Version: 1.1.8-7.el6-394e906
2 Nodes configured, 2 expected votes
5 Resources configured.
Node jie3.com: standby
Online: [ jie2.com ]
Master/Slave Set: ms_mysqldrbd [mysqldrbd]
Masters: [ jie2.com ] #资源已然转到jie2.com上面
Stopped: [ mysqldrbd:1 ]
mystore (ocf::heartbeat:Filesystem): Started jie2.com
myvip (ocf::heartbeat:IPaddr): Started jie2.com
myserver (lsb:mysqld): Started jie2.com
由于定义了drbd的资源约束，Masters运行在那个节点，则此节点不可能成为drbd的辅助节点
[root@jie3 ~]# cat /proc/drbd
version: 8.4.3 (api:1/proto:86-101)
GIT-hash: 89a294209144b68adb3ee85a73221f964d3ee515 build by gardner@, 2013-05-27 04:30:21
0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r-----
ns:426 nr:354 dw:741 dr:6528 al:8 bm:9 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
[root@jie3 ~]# drbdadm secondary mydata
0: State change failed: (-12) Device is held open by someone
Command 'drbdsetup secondary 0' terminated with exit code 11
手动的停掉myvip资源还是会启动（因为定义资源是指定了on-fail=restart）
[root@jie2 ~]# ifconfig | grep eth0
eth0 Link encap:Ethernet HWaddr 00:0C:29:1F:74:CF
inet addr:172.16.22.2 Bcast:172.16.255.255 Mask:255.255.0.0
inet6 addr: fe80::20c:29ff:fe1f:74cf/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2165062 errors:0 dropped:0 overruns:0 frame:0
TX packets:4109895 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:167895762 (160.1 MiB) TX bytes:5731508707 (5.3 GiB)
eth0:0 Link encap:Ethernet HWaddr 00:0C:29:1F:74:CF
inet addr:172.16.22.100 Bcast:172.16.255.255 Mask:255.255.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[root@jie2 ~]# ifconfig eth0:0 down
[root@jie2 ~]# ifconfig | grep eth0
eth0 Link encap:Ethernet HWaddr 00:0C:29:1F:74:CF
inet addr:172.16.22.2 Bcast:172.16.255.255 Mask:255.255.0.0
inet6 addr: fe80::20c:29ff:fe1f:74cf/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2165242 errors:0 dropped:0 overruns:0 frame:0
TX packets:4110094 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:167917669 (160.1 MiB) TX bytes:5731537035 (5.3 GiB)
[root@jie2 ~]# crm status
Last updated: Thu Aug 8 18:29:27 2013
Last change: Mon Sep 2 01:44:59 2013 via crm_attribute on jie3.com
Stack: classic openais (with plugin)
Current DC: jie3.com - partition with quorum
Version: 1.1.8-7.el6-394e906
2 Nodes configured, 2 expected votes
5 Resources configured.
Node jie3.com: standby
Online: [ jie2.com ]
Master/Slave Set: ms_mysqldrbd [mysqldrbd]
Masters: [ jie2.com ]
Stopped: [ mysqldrbd:1 ]
mystore (ocf::heartbeat:Filesystem): Started jie2.com
myvip (ocf::heartbeat:IPaddr): Started jie2.com
myserver (lsb:mysqld): Started jie2.com
Failed actions:
myvip_monitor_20000 (node=jie2.com, call=47, rc=7, status=complete): not running
myserver_monitor_20000 (node=jie3.com, call=209, rc=7, status=complete): not running
[root@jie2 ~]# ifconfig | grep eth0
eth0 Link encap:Ethernet HWaddr 00:0C:29:1F:74:CF
inet addr:172.16.22.2 Bcast:172.16.255.255 Mask:255.255.0.0
inet6 addr: fe80::20c:29ff:fe1f:74cf/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2165681 errors:0 dropped:0 overruns:0 frame:0
TX packets:4110535 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:168015864 (160.2 MiB) TX bytes:5731617112 (5.3 GiB)
eth0:1 Link encap:Ethernet HWaddr 00:0C:29:1F:74:CF
inet addr:172.16.22.100 Bcast:172.16.255.255 Mask:255.255.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[root@jie2 ~]#
自此mysql的高可用已经完成。本博客没对crm命令参数进行解释