corosync+pacemaker+mysql+drbd 實現mysql的高可用
====================================
一、瞭解各組件是什麼以及之間的關係
二、安裝高可用集羣的提前
三、安裝corosync+pacemaker
四、編譯安裝mysql
五、安裝drbd
六、mysql與drbd實現mysql數據的鏡像
七、利用crmsh配置mysql的高可用
====================================
環境：
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
拓撲圖：
部分軟件以附件的形式上傳，mysql的源碼包軟件，網上很容易找
望各位博友帶着下面的疑問去實現corosync+pacemaker+mysql+drbd mysql的高可用？
1、corosync是什麼？pacemaker是什麼？corosync與pacemaker的關係？
2、 mysql與drbd之間的連接關係？
3、 corosync、pacemaker、mysql、drbd之間的關係？
4、提到高可用集羣，廣大博友們就會想到，高可用集羣中資源之間是如何建立關係？各個節點會不會搶佔資源使其出現腦裂(split-brain)？
出現腦裂可以有fence設備自行解決
一、瞭解各組件是什麼以及之間的關係
corosync：corosync的由來是源於一個Openais的項目，是Openais的一個子 項目，可以實現HA心跳信息傳輸的功能，是衆多實現HA集羣軟件中之一，heartbeat與corosync是流行的Messaging Layer （集羣信息層）工具。而corosync是一個新興的軟件，相比Heartbeat這款很老很成熟的軟件，corosync與Heartbeat各有優勢，博主就不在這裏比較之間的優勢了，corosync相對於Heartbeat只能說現在比較流行。
pacemaker：是衆多集羣資源管理器(Cluster Resource Manager)CRM中的一個，其主要功能是管理來着集羣信息層發送來的信息。Pacemaker是集羣的核心,它管理集羣和集羣信息. 集羣信息更新通過Corosync通知到各個節點.
常見的CRM有:
heartbeat v1-->haresources
hearbeat v2--->crm
hearbeat v3---->pacemaker
RHCS(cman)----->rgmanager
如下圖corosync與pacemaker之間的關係：
mysql：一個開源的關係型數據庫
drbd：DRBD:(distributed replication block device)即分佈式複製塊設備。它的工作原理是：在A主機上有對指定磁盤設備寫請求時，數據發送給A主機的kernel，然後通kernel中的一個模塊，把相同的數據傳送給B主機的kernel中一份，然後B主機再寫入自己指定的磁盤設備，從而實現兩主機數據的同步,也就實現了寫操作高可用。類似於raid1一樣，實現數據的鏡像，DRBD一般是一主一從，並且所有的讀寫操作，掛載只能在主節點服務器上進行，，但是主從DRBD服務器之間是可以進行調換的。
各個組件之間的關係：其實mysql與drbd根本沒有半毛錢的關係，而drbd與mysql相結合就有很重要的作用了，因爲drbd實現數據的鏡像，當drbd的主節點掛了之後，drbd的輔助節點還可以提供服務，但是主節點不會主動的切換到輔助的節點上面去，於是乎，高可用集羣就派上用場了，因爲資源定義爲高可用的資源，主節點出現故障之後，高可用集羣可以自動的切換到輔助節點上去，實現故障轉移繼續提供服務。
二、安裝高可用集羣的提前準備
1）、hosts文件
#把主機名改成jie2.com
[root@jie2 ~]# sed -i s/`grep HOSTNAME /etc/sysconfig/network |awk -F '=' '{print $2}'`/jie2.com/g /etc/sysconfig/network
#把主機名改成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
>EOF2）、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）、關閉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）、時間同步(博主用的是自己的ntp時間服務器)
[root@jie2 ~]#ntpdate 172.16.0.1 [root@jie3 ~]#ntpdate 172.16.0.1
三、安裝corosync+pacemaker
1）、安裝corosync+pacemaker
#節點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命令接口的軟件
#節點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.rpm2）、修改配置文件和生成認證文件
配置文件
#節點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 { #心跳信息傳遞層
version: 2 #版本
secauth: on #認證信息 一般on
threads: 0 #線程
interface { #定義心跳信息傳遞的接口
ringnumber: 0
bindnetaddr: 172.16.0.0 #綁定的網絡地址，寫網絡地址
mcastaddr: 226.94.1.1 #多播地址
mcastport: 5405 #多播的端口
ttl: 1 #生存週期
}
}
logging { #日誌
fileline: off
to_stderr: no #是否輸出在屏幕上
to_logfile: yes #定義自己的日誌
to_syslog: no #是否由syslog記錄日誌
logfile: /var/log/cluster/corosync.log #日誌文件的存放路徑
debug: off
timestamp: on #時間戳是否關閉
logger_subsys {
subsys: AMF
debug: off
}
}
amf {
mode: disabled
}
service {
ver: 0
name: pacemaker #pacemaker作爲corosync的插件進行工作
}
aisexec {
user: root
group: root
}
[root@jie2 corosync]# scp corosync.conf jie3:/etc/corosync/
##把節點jie2.com的配置文件copy到jie3.com中認證文件
#節點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).
#遇到這個情況，表示電腦的隨機數不夠，各位朋友可以不停的隨便敲鍵盤，或者安裝軟件也可以生成隨機數
[root@jie2 corosync]# scp authkey jie3:/etc/corosync/
#把認證文件也複製到jie3.com主機上3）、開啓服務和查看集羣中的節點信息
#節點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 ]
#節點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、編譯安裝mysql(兩個節點的操作過程都是一樣)
#節點jie2.com的操作 #1)、解壓編譯安裝 [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)、建立配置文件和腳本文件 [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)、關聯繫統識別的路徑 [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
先別初始化數據庫，安裝drbd把drbd掛載到目錄下，然後初始化數據庫把數據庫的數據存放到drbd掛載的目錄。
五、安裝drbd
安裝rpm包的drbd軟件必須保證找相同內核版本的drbd-kmdl軟件
1）、先劃分一個分區，此分區做成drbd鏡像(RHEL 6.x的重新格式化一個新的分區之後要重啓系統）
#節點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
#節點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): w2）、安裝drbd和修改配置文件
#1)、安裝drbd
#節點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%]
#節點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
#節點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 #資源配置文件
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到節點jie3.com上面
[root@jie2 drbd.d]# scp global_common.conf mydata.res jie3:/etc/drbd.d/3）、初始化drbd的資源並啓動
#節點jie2.com的操作
#創建drbd的資源
[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. #提示已經創建成功
lk_bdev_save(/var/lib/drbd/drbd-minor-0.lkbd) failed: No such file or directory
#啓動服務
[root@jie2 ~]# service drbd start
Starting DRBD resources: [
create res: mydata
prepare disk: mydata
adjust disk: mydata
adjust net: mydata
]
.......... [ok]
#節點jie3.com的操作
#創建drbd的資源
[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. #提示已經創建成功
lk_bdev_save(/var/lib/drbd/drbd-minor-0.lkbd) failed: No such file or directory
#啓動服務
[root@jie3 ~]# service drbd start
Starting DRBD resources: [
create res: mydata
prepare disk: mydata
adjust disk: mydata
adjust net: mydata
]
.......... [ok]4）、設置一個主節點，然後同步drbd的數據(此步驟只需在一個節點上操作)
#設置jie2.com爲drbd的主節點
[root@jie2 ~]# drbdadm primary --force mydata
[root@jie2 ~]# cat /proc/drbd #查看同步進度
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' 此命令可以動態的查看
[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 #當兩邊都爲UpToDate時，表示兩邊已經同步5）、格式化drdb分區(此步驟在主節點上操作)
[root@jie2 ~]# mke2fs -t ext4 /dev/drbd0
六、mysql與drbd實現mysql數據的鏡像
1）、在drbd的主節點上，掛載drbd的分區，然後初始化數據庫
[root@jie2 ~]# mkdir /mydata #創建用於掛載drbd的目錄
[root@jie2 ~]# mount /dev/drbd0 /mydata/
[root@jie2 ~]# mkdir /mydata/data
[root@jie2 ~]#chown -R mysql.mysql /mydata #把文件的屬主和屬組改成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 #初始化數據庫
[root@jie2 ~]# service mysqld start
Starting MySQL ....... [ OK ]2）、驗證drbd是否鏡像
#節點jie2.com的操作
#1)、先在drbd的主節點上面創建一個數據庫
[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服務，卸載drbd掛載的目錄
[root@jie2 ~]# service mysqld stop
[root@jie2 ~]# umount /dev/drbd0 #卸載drbd的掛載點
[root@jie2 ~]# drbdadm secondary mydata #把此節點改爲drbd的備用節點
#節點jie3.com的操作
#3）、把jie3.com變爲drbd的主節點
[root@jie3 ~]#drbdadm primary mydata #把此節點改爲drbd的主節點
[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 #此節點上不用初始化數據庫，直接開啓服務即可
Starting MySQL ....... [ OK ]
[root@jie3 ~]# mysql
mysql> show databases; #可以看見jie2數據庫
+--------------------+
| 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
需要定義集羣資源而mysql、drbd都是集羣的資源，由集羣管理的資源開機是一定不能夠自行啓動的。
1）、關閉drbd的服務和關閉mysql的服務
[root@jie2 ~]#service mysqld stop [root@jie2 ~]#service drbd stop [root@jie3 ~]#service mysqld stop [root@jie3 ~]#umount /dev/drbd0 #之前drbd已經掛載到jie3.com節點上了 [root@jie3 ~]#service drdb stop
2）、定義集羣資源
定義drbd的資源(提供drbd的資源代理RA由OCF類別中的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 #可以檢查語法
定義drbd的主從資源
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
定義文件系統資源和約束關係
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
定義vip資源、mysql服務的資源約束關係
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
查看所有定義資源的信息
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"查看資源運行的狀態運行在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切換節點，看資源是否轉移
[root@jie3 ~]# crm node standby jie3.com #把此節點設置爲備用節點
[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 ] #資源已然轉到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由於定義了drbd的資源約束，Masters運行在那個節點，則此節點不可能成爲drbd的輔助節點
[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手動的停掉myvip資源還是會啓動（因爲定義資源是指定了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的高可用已經完成。本博客沒對crm命令參數進行解釋