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:
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[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
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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
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#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
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2）、ssh互信
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[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
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3）、关闭NetworkManger
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[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
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4）、时间同步(博主用的是自己的ntp时间服务器)
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[root@jie2 ~]
#ntpdate 172.16.0.1
[root@jie3 ~]
#ntpdate 172.16.0.1
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三、安装corosync+pacemaker
1）、安装corosync+pacemaker
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#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
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2）、修改配置文件和生成认证文件
配置文件
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#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
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认证文件
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#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
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3）、开启服务和查看集群中的节点信息
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#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 ]
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四、编译安装mysql(两个节点的操作过程都是一样)
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#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
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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）
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#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
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2）、安装drbd和修改配置文件
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#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/
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3）、初始化drbd的资源并启动
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#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]
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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)
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#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
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5）、格式化drdb分区(此步骤在主节点上操作)
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[root@jie2 ~]
# mke2fs -t ext4 /dev/drbd0
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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
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[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 ]
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2）、验证drbd是否镜像
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#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)
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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
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[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
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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）
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[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
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定义drbd的主从资源
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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
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定义文件系统资源和约束关系
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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
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定义vip资源、mysql服务的资源约束关系
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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
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查看所有定义资源的信息
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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"
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查看资源运行的状态运行在jie3.com上
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[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
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切换节点，看资源是否转移
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[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
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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
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[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
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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）
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[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 ~]
#
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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
本文转自 jie783213507 51CTO博客，原文链接：http://blog.51cto.com/litaotao/1303307，如需转载请自行联系原作者
