corosync+drbd實現mariadb高可用集羣
項目介紹
環境中一共有兩個節點，node1提供Mariadb服務，node2爲node1的備份。node
數據庫部署在DRBD磁盤分區，保證數據實時同步到備節點。mysql
正常請求下，node1節點運行VIP，DRBD，Mariadb提供服務，一旦node1節點出現故障，node2節點檢測不到node1節點的心跳，就會啓用DRBD、Mariadb，VIP繼續提供Mariadb服務，保證業務不中斷。linux
架構缺點：不管是corosync仍是drbd都有一個嚴重的問題就是裂腦,要是有分佈式系統能夠將Mariadb部署在分佈式系統上。算法
故障前拓撲:sql
故障後拓撲數據庫
環境說明：bootstrap
主機名vim |
接口centos |
Ip地址api |
用途 |
|
Node1 |
Node1.xmfb.com |
Eth0 |
172.16.4.100 |
集羣主節點，提供Mariadb服務 |
Node2 |
Node2.xmfb.com |
Eth0 |
172.16.4.101 |
備用節點，不斷檢測主節點是否故障，隨時準備接替主節點提供高可用服務 |
VIP |
172.16.4.1 |
用戶訪問集羣使用的地址 |
配置前的準備
（1）節點間時間必須同步：使用ntp協議實現；
[root@node1 ~]# ntpdate 172.16.0.1 #172.16.0.1是我這裏的時間服務器 [root@node2 ~]# ntpdate 172.16.0.1
（2） 節點間須要經過主機名互相通訊，必須解析主機至IP地址；
(a)建議名稱解析功能使用hosts文件來實現；
(b)通訊中使用的名字與節點名字必須保持一致：「uname -n」命令，或「hostname」展現出的名字保持一致；
[root@node1 ~]# sed -i's@\(HOSTNAME=\).*@\1node1.xmfb.com@g' /etc/sysconfig/network [root@node1 ~]# hostname node1.xmfb.com [root@node1 ~]# echo "172.16.4.100node1.xmfb.com node1" >> /etc/hosts [root@node1 ~]# echo "172.16.4.101node2.xmfb.com node2" >> /etc/hosts [root@node2 ~]# sed -i's@\(HOSTNAME=\).*@\1node2.xmfb.com@g' /etc/sysconfig/network [root@node2 ~]# hostname node2.xmfb.com [root@node2 ~]# echo "172.16.4.100 node1.xmfb.comnode1" >> /etc/hosts [root@node2 ~]# echo "172.16.4.101node2.xmfb.com node2" >> /etc/hosts
（3）考慮仲裁設備是否會用到；
（4） 創建各節點之間的root用戶可以基於密鑰認證；
#ssh-keygen -t rsa -P ''
#ssh-copy-id -i /root/.ssh/id_rsa.pub root@HOSTNAME
[root@node1 ~]# ssh-keygen -t rsa -f ~/.ssh/id_rsa-P '' [root@node1 ~]# ssh-copy-id -i .ssh/id_rsa.pubnode2 [root@node2 ~]# ssh-keygen -t rsa -f ~/.ssh/id_rsa-P '' [root@node2 ~]# ssh-copy-id -i .ssh/id_rsa.pubnode1
注意：定義成爲集羣服務中的資源，必定不能開機自動啓動；由於它們將由crm管理；
Corosync配置
安裝corosync
[root@node1~]# yum -y install corosync pacemaker [root@node2~]# yum -y install corosync pacemaker
安裝crm
[root@node1 ~]# yum--nogpgcheck localinstall crmsh-2.1-1.6.x86_64.rpm pssh-2.3.1-2.el6.x86_64.rpm –y [root@node2 ~]# yum --nogpgcheck localinstallcrmsh-2.1-1.6.x86_64.rpm pssh-2.3.1-2.el6.x86_64.rpm -y
複製配置文件模版
[root@node1 ~]# cp/etc/corosync/corosync.conf.example /etc/corosync/corosync.conf
修改配置文件
[root@node1 ~]# vim /etc/corosync/corosync.conf
compatibility: whitetank
totem {
version: 2
secauth: on
threads: 0
interface {
ringnumber: 0
bindnetaddr: 172.16.0.0
mcastaddr: 239.165.17.11
mcastport: 5405
ttl: 1
}
}
logging {
fileline: off
to_stderr: no
to_logfile: no
logfile: /var/log/cluster/corosync.log
to_syslog: yes
debug: off
timestamp: on
logger_subsys {
subsys: AMF
debug: off
}
}
service {
ver: 0
name:pacemaker
use_mgmtd:yes
}
aisexec {
user:root
group: root
}
生成驗證密鑰
[root@node1 ~]# corosync-keygen
複製配置文件和密鑰到節點2
[root@node1 ~]# scp/etc/corosync/{authkey,corosync.conf} node2:/etc/corosync/
authkey 100% 128 0.1KB/s 00:00
corosync.conf 100% 2790 2.7KB/s 00:00
啓動corosync
[root@node1 ~]# service corosync start;ssh node2'service corosync start'
查看集羣狀態信息
[root@node1 ~]# crm status Last updated: Sun May 31 17:32:28 2015 Last change: Sun May 31 17:32:22 2015 Stack: classic openais (with plugin) Current DC: node1.xmfb.com - partition with quorum Version: 1.1.11-97629de 2 Nodes configured, 2 expected votes 0 Resources configured Online: [ node1.xmfb.com node2.xmfb.com ]
解決corosync中STONITH報錯問題
crm(live)configure# property stonith-enabled=false crm(live)configure# commit
資源轉移配置
crm(live)configure# property no-quorum-policy=ignore
資源粘性配置
crm(live)configure# propertydefault-resource-stickiness=50
Corosync就先配置到這裏，而後配置drbd
drbd配置
配置以前須要配置好作drbd磁盤的分區，並且不要格式化（此處省略）
安裝配置drbd
安裝drbd
rpm -ivh kmod-drbd84-8.4.5-504.1.el6.x86_64.rpmdrbd84-utils-8.9.1-1.el6.elrepo.x86_64.rpm
配置global_common.conf
[root@node1 ~]# vim /etc/drbd.d/global_common.conf
global {
usage-count no;
# minor-countdialog-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-timeout120;
#degr-wfc-timeout 120;
}
disk {
on-io-errordetach; #若是磁盤故障就拆掉，不讓磁盤繼續同步
#fencingresource-only;
}
net {
cram-hmac-alg"sha1"; #同步的算法
shared-secret"mydrbdlab"; #同步的隨機碼
}
syncer {
rate200M; #設置同步的速率
}
}
定義一個資源，文件結尾必須是res
[root@node1 ~]# vim /etc/drbd.d/mystore.res #文件名最好和資源一致。
resource mystore {
onnode1.xmfb.com {
device /dev/drbd0; #資源名稱
disk /dev/sda3; #本地drbd設備
address 172.16.4.100:7789; #drbd節點設置，並且須要保證能夠解析對方的節點
meta-diskinternal; #drbd網絡設置
}
onnode2.xmfb.com {
device /dev/drbd0;
disk /dev/sda3;
address 172.16.4.101:7789;
meta-diskinternal;
}
}
以上文件在兩個節點上必須相同，所以，能夠基於ssh將剛纔配置的文件所有同步至另一個節點。
[root@node1 ~]# scp-r /etc/drbd.* node2:/etc/ drbd.conf 100% 133 0.1KB/s 00:00 mystore.res 100% 201 0.2KB/s 00:00 global_common.conf 100%2197 2.2KB/s 00:00
初始化資源，兩個節點都運行
[root@node1 ~]# drbdadm create-md mystore initializing activity log NOT initializing bitmap Writing meta data... New drbd meta data block successfully created. [root@node2 ~]# drbdadm create-md mystore initializing activity log NOT initializing bitmap Writing meta data... New drbd meta data block successfully created.
啓動drbd
[root@node1 ~]# service drbd start [root@node2 ~]# service drbd start
說明，第一個節點啓動的時候會等待第二個節點啓動，若是第二個節點不啓動那麼第一個節點也沒法啓動
drbd做爲集羣資源須要設置開機不啓動
[root@node1 ~]# chkconfig drbd off [root@node1 ~]# chkconfig --list drbd drbd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
啓動後的配置
查看狀態，因爲都沒有配置主節點因此都是從節點
[root@node1 ~]# cat /proc/drbd version: 8.4.5 (api:1/proto:86-101) GIT-hash: 1d360bde0e095d495786eaeb2a1ac76888e4db96build by root@node1.magedu.com, 2015-01-02 12:06:20 0:cs:Connected ro:Secondary/Secondaryds:Inconsistent/Inconsistent C r----- ns:0 nr:0dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:5252056
設置主從
[root@node1 ~]# drbdadm -- --overwrite-data-of-peerprimary mystore [root@node1 ~]# cat /proc/drbd version: 8.4.5 (api:1/proto:86-101) GIT-hash: 1d360bde0e095d495786eaeb2a1ac76888e4db96build by root@node1.magedu.com, 2015-01-02 12:06:20 0:cs:SyncSource ro:Primary/Secondary ds:UpToDate/Inconsistent C r---n- ns:160720nr:0 dw:0 dr:164648 al:0 bm:0 lo:0 pe:9 ua:5 ap:0 ep:1 wo:f oos:5093336 [>....................]sync'ed: 3.2% (4972/5128)M finish:0:02:40 speed: 31,744 (31,744) K/sec
主從已經設置完成，正在同步數據
格式化掛載drbd設備
[root@node1 ~]# mkfs.ext4 -j /dev/drbd0 [root@node1 ~]# mkdir /mydata [root@node1 ~]# mount /dev/drbd0 /mydata/
drbd複製驗證
在主節點的drbd分區建立一個測試文件
[root@node1 ~]# cd /mydata/ [root@node1 mydata]# touch test [root@node1 mydata]# ls lost+found test
調換主從角色，調換以前須要卸載文件系統，由於主從節點不能同時使用
[root@node1 ~]# umount /mydata/ [root@node1 ~]# drbdadm secondary mystore [root@node1 ~]# drbd-overview 0:mystore/0 Connected Secondary/Secondary UpToDate/UpToDate
從節點掛載查看主節點建立的文件還在說明drbd配置成功
[root@node2 ~]# drbd-overview 0:drbd/0 ConnectedSecondary/Secondary UpToDate/UpToDate C r----- [root@node2 ~]# drbdadm primary mystore [root@node2 ~]# mkdir /mydata [root@node2 ~]# mount /dev/drbd0 /mydata [root@node2 ~]# cd /mydata [root@node2 mydata]# ls lost+found testdrbd
配置corosync+drbd高可用
配置以前須要先關閉drbd
[root@node1 ~]# service drbd stop [root@node2 ~]# service drbd stop
使用corosync定義drbd高可用是由linbit實現的
crm(live)ra# classes lsb ocf / heartbeat linbit pacemaker service stonith crm(live)ra# info ocf:linbit:drbd #查看drbd幫助信息
定義drbd資源和克隆
crm(live)configure# primitive mystorocf:linbit:drbd params drbd_resource="mystore" op monitorrole="Master" interval=10s timeout=20s op monitorrole="Slave" interval=20s timeout=20s op start timeout=240s op stoptimeout=100s crm(live)configure# ms my_mystor mystor metaclone-max="2" clone-node-max="1" master-max="1"master-node-max="1" notify="true"
定義drbd掛載
crm(live)configure# primitive mydataocf:heartbeat:Filesystem params device="/dev/drbd0"directory="/mydata" fstype="ext4" op monitor interval=20stimeout=40s op start timeout=60s op stop timeout=60s
設置位置約束
crm(live)configure# colocationmydata_with_ms_mystor_master inf: mydata my_mystor:Master
順序約束
crm(live)configure#order mydata_after_ms_mystor_master Mandatory: my_mystor:promote mydata:start
轉換測試
[root@node1 /]# crm status Last updated: Sun May 31 14:16:28 2015 Last change: Sun May 31 14:16:13 2015 Stack: classic openais (with plugin) Current DC: node2.xmfb.com - partition with quorum Version: 1.1.11-97629de 2 Nodes configured, 2 expected votes 3 Resources configured Online: [ node1.xmfb.com node2.xmfb.com ] Master/SlaveSet: my_mystor [mystor] Masters:[ node1.xmfb.com ] Slaves:[ node2.xmfb.com ] mydata(ocf::heartbeat:Filesystem): Started node1.xmfb.com [root@node1 ~]# crm node standby [root@node2 ~]# crm status Last updated: Sun May 31 22:10:17 2015 Last change: Sun May 31 22:09:20 2015 Stack: classic openais (with plugin) Current DC: node2.xmfb.com - partition with quorum Version: 1.1.11-97629de 2 Nodes configured, 2 expected votes 3 Resources configured Node node1.xmfb.com: standby Online: [ node2.xmfb.com ] Master/SlaveSet: my_mystor [mystor] Masters:[ node2.xmfb.com ] Stopped:[ node1.xmfb.com ] mydata(ocf::heartbeat:Filesystem): Started node2.xmfb.com
drbd主從也是正常的
[root@node2 ~]# drbd-overview 0:mystore/0 Connected Primary/Secondary UpToDate/UpToDate /mydata ext4 4.9G 11M 4.6G1%
Mariadb配置
主節點部署mariadb
建立mariadb用戶和數據目錄
[root@node1 ~]# groupadd -r -g 306 mysql [root@node1 ~]# useradd -r -g 306 -u 306 mysql [root@node1 ~]# mkdir /mydata/data [root@node1 ~]# chown -R mysql.mysql /mydata/data/
安裝mariadb
tar xfmariadb-5.5.43-linux-x86_64.tar.gz -C /usr/local/ cd/usr/local/ ln -smariadb-5.5.43-linux-x86_64/ mysql cd mysql/ chown -Rroot.mysql ./* scripts/mysql_install_db--user=mysql --data=/mydata/data/
設置啓動腳本
cp support-files/mysql.server/etc/rc.d/init.d/mysqld chkconfig --add mysqld chkconfig mysqld off
設置配置文件
[root@node1 ~]# cp support-files/my-large.cnf/etc/my.cnf [root@node1 ~]# vim /etc/my.cnf thread_concurrency = 2 #設置CPU核心數量乘以2 datadir = /mydata/data #設置數據文件目錄 innodb_file_per_table = 1 #使用inoodb引擎，每表一個表文件
優化執行路徑
echo "exportPATH=/usr/local/mysql/bin:$PATH" >> /etc/profile.d/mysql . /etc/profile.d/mysql
啓動測試
[root@node1 mysql]# service mysqld start Starting MySQL... [ OK ] [root@node1 mysql]# mysql Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 2 Server version: 5.5.43-MariaDB-log MariaDB Server Copyright (c) 2000, 2015, Oracle, MariaDBCorporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clearthe current input statement. MariaDB [(none)]>
設置root用戶能夠遠程鏈接
MariaDB [(none)]> GRANT ALL ON *.* TO'root'@'172.16.%.%' IDENTIFIED BY 'centos'; MariaDB [(none)]> FLUSH PRIVILEGES;
設置完成關閉mysql服務
service mysqld stop
設置節點1爲備節點
[root@node1 ~]# crm node standby [root@node1 ~]# crm node online [root@node2 ~]# crm status Last updated: Wed Jun 3 21:19:10 2015 Last change: Wed Jun 3 21:19:07 2015 Stack: classic openais (with plugin) Current DC: node1.xmfb.com - partition with quorum Version: 1.1.11-97629de 2 Nodes configured, 2 expected votes 3 Resources configured Node node1.xmfb.com: standby Online: [ node2.xmfb.com ] Master/SlaveSet: MS_Mysql [mysqldrbd] Masters:[ node2.xmfb.com ] Stopped:[ node1.xmfb.com ] mydata(ocf::heartbeat:Filesystem): Started node2.xmfb.com
備用節點部署mariadb
部署以前確保，主節點安裝的文件已經轉移到備節點
[root@node2 ~]# ll /mydata/ total 20 -rw-r--r-- 1 root root 0 May 31 21:46 a.txt drwxr-xr-x 5 306 306 4096 May 31 22:16 data drwx------ 2 root root 16384 May 31 21:46lost+found [root@node2 ~]# ll /mydata/data/ total 28716 -rw-rw---- 1 306 306 16384 May 31 22:16aria_log.00000001 -rw-rw---- 1 306 306 52 May 31 22:16aria_log_control -rw-rw---- 1 306 306 18874368 May 31 22:16 ibdata1 -rw-rw---- 1 306 306 5242880 May 31 22:16ib_logfile0 -rw-rw---- 1 306 306 5242880 May 31 22:16ib_logfile1 drwx------ 2 306 root 4096 May 31 22:15 mysql -rw-rw---- 1 306 306 476 May 31 22:16mysql-bin.000001 -rw-rw---- 1 306 306 19 May 31 22:16mysql-bin.index -rw-r----- 1 306 root 2414 May 31 22:16 node1.xmfb.com.err drwx------ 2 306 306 4096 May 31 22:15performance_schema drwx------ 2 306 root 4096 May 31 22:14 test
建立mysql相關用戶
[root@node1 ~]# groupadd -r -g 306 mysql [root@node1 ~]# useradd -r -g 306 -u 306 mysql
安裝mariadb不須要初始化
tar xf mariadb-5.5.43-linux-x86_64.tar.gz -C/usr/local/ cd /usr/local/ ln -s mariadb-5.5.43-linux-x86_64/ mysql cd mysql/ chown -R root.mysql ./*
複製配置文件
[root@node1 ~]# scp /etc/my.cnf node2:/etc/my.cnf
設置啓動腳本
cp support-files/mysql.server/etc/rc.d/init.d/mysqld chkconfig --add mysqld chkconfig mysqld off
優化執行路徑
echo "export PATH=/usr/local/mysql/bin:$PATH">> /etc/profile.d/mysql . /etc/profile.d/mysql
啓動mariadb
[root@node2 ~]# service mysqld start
建立一個數據庫
MariaDB [(none)]> create database testdb; Query OK, 1 row affected (0.06 sec) MariaDB [(none)]> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | test | | testdb | +--------------------+ 5 rows in set (0.00 sec)
關閉mysql服務
[root@node2 ~]# service mysqld stop
切換主從節點
[root@node2 ~]# crm node standby [root@node2 ~]# crm node online [root@node2 ~]# crm status Last updated: Sun May 31 22:32:38 2015 Last change: Sun May 31 22:32:33 2015 Stack: classic openais (with plugin) Current DC: node2.xmfb.com - partition with quorum Version: 1.1.11-97629de 2 Nodes configured, 2 expected votes 3 Resources configured Online: [ node1.xmfb.com node2.xmfb.com ] Master/SlaveSet: my_mystor [mystor] Masters:[ node1.xmfb.com ] Slaves:[ node2.xmfb.com ] mydata(ocf::heartbeat:Filesystem): Started node1.xmfb.com
node1啓動mysql服務
[root@node1 ~]# service mysqld start
登陸數據庫能夠看到node2上面建立的數據庫
MariaDB [(none)]> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | test | | testdb | +--------------------+ 5 rows in set (0.00 sec)
查看完成中止mysql服務
[root@node1 ~]# service mysqld stop
配置mysql高可用集羣
設置vip資源
crm(live)configure# primitive myipocf:heartbeat:IPaddr params ip="172.16.4.1" op monitor interval=10stimeout=20s
定義mysql服務爲集羣資源
crm(live)configure# primitive myserver lsb:mysqldop monitor interval=20s timeout=20s
定義位置約束
crm(live)configure# colocationmyip_with_ms_mystor_master inf: myip my_mystor:Master crm(live)configure# colocation myserver_with_mydatainf: myserver mydata
定義順序約束
crm(live)configure# order myserver_after_mydataMandatory: mydata:start myserver:start crm(live)configure# order myserver_after_myipMandatory: myip:start myserver:start
設置完成commit提交，而且查看狀態
[root@node1 ~]# crm status Last updated: Sun May 31 22:48:39 2015 Last change: Sun May 31 22:48:27 2015 Stack: classic openais (with plugin) Current DC: node2.xmfb.com - partition with quorum Version: 1.1.11-97629de 2 Nodes configured, 2 expected votes 5 Resources configured Online: [ node1.xmfb.com node2.xmfb.com ] Master/SlaveSet: my_mystor [mystor] Masters:[ node1.xmfb.com ] Slaves:[ node2.xmfb.com ] mydata(ocf::heartbeat:Filesystem): Started node1.xmfb.com myip (ocf::heartbeat:IPaddr):Started node1.xmfb.com myserver (lsb:mysqld):Startednode1.xmfb.com
驗證
設置完成以後，使用其餘節點可使用vip地址鏈接mysql
[root@node2 ~]# mysql -u root -h172.16.4.1 –p MariaDB [(none)]> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | test | | testdb | +--------------------+ 5 rows in set (0.01 sec)
主備轉換測試
[root@node1 ~]# crm node standby
節點2已經啓動vip和mysql資源
[root@node2 ~]# crm status Last updated: Sun May 31 22:57:34 2015 Last change: Sun May 31 22:57:23 2015 Stack: classic openais (with plugin) Current DC: node2.xmfb.com - partition with quorum Version: 1.1.11-97629de 2 Nodes configured, 2 expected votes 5 Resources configured Online: [ node1.xmfb.com node2.xmfb.com ] Master/SlaveSet: my_mystor [mystor] Masters:[ node2.xmfb.com ] Slaves:[ node1.xmfb.com ] mydata(ocf::heartbeat:Filesystem): Started node2.xmfb.com myip (ocf::heartbeat:IPaddr):Started node2.xmfb.com myserver (lsb:mysqld):Startednode2.xmfb.com
鏈接數據庫依舊正常
[root@node2 ~]# mysql -u root -h172.16.4.1 -p Enter password: Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 2 Server version: 5.5.43-MariaDB-log MariaDB Server Copyright (c) 2000, 2015, Oracle, MariaDBCorporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clearthe current input statement. MariaDB [(none)]> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | test | | testdb | +--------------------+ 5 rows in set (0.06 sec)
建立一個表
MariaDB [(none)]> use testdb; Database changed MariaDB [testdb]> create table t1 (id int,namevarchar(20)); Query OK, 0 rows affected (0.10 sec) MariaDB [testdb]> show tables; +------------------+ | Tables_in_testdb | +------------------+ | t1 | +------------------+ 1 row in set (0.00 sec)
再次進行主從切換
[root@node2 ~]# crm node standby [root@node2 ~]# crm node online
節點轉移到node1
[root@node2 ~]# crm status Last updated: Sun May 31 23:03:37 2015 Last change: Sun May 31 23:03:32 2015 Stack: classic openais (with plugin) Current DC: node2.xmfb.com - partition with quorum Version: 1.1.11-97629de 2 Nodes configured, 2 expected votes 5 Resources configured Online: [ node1.xmfb.com node2.xmfb.com ] Master/SlaveSet: my_mystor [mystor] Masters:[ node1.xmfb.com ] Slaves:[ node2.xmfb.com ] mydata(ocf::heartbeat:Filesystem): Started node1.xmfb.com myip (ocf::heartbeat:IPaddr):Started node1.xmfb.com myserver (lsb:mysqld):Startednode1.xmfb.com
數據庫訪問依舊正常
MariaDB [testdb]> show tables; +------------------+ | Tables_in_testdb | +------------------+ | t1 | +------------------+ 1 row in set (0.00 sec)
Corosync最終配置環境
crm(live)configure# show node node1.xmfb.com \ attributes standby=on node node2.xmfb.com \ attributes standby=off primitive mydata Filesystem \ params device="/dev/drbd0" directory="/mydata"fstype=ext4 \ opmonitor interval=20s timeout=40s \ opstart timeout=60s interval=0 \ opstop timeout=60s interval=0 primitive myip IPaddr \ params ip=172.16.4.1 \ opmonitor interval=10s timeout=20s primitive myserver lsb:mysqld \ opmonitor interval=20s timeout=20s primitive mystor ocf:linbit:drbd \ params drbd_resource=mystore \ opmonitor role=Master interval=10s timeout=20s \ opmonitor role=Slave interval=20s timeout=20s \ opstart timeout=240s interval=0 \ opstop timeout=100s interval=0 ms my_mystor mystor \ metaclone-max=2 clone-node-max=1 master-max=1 master-node-max=1 notify=true colocation mydata_with_ms_mystor_master inf: mydatamy_mystor:Master colocation myip_with_ms_mystor_master inf: myipmy_mystor:Master colocation myserver_with_mydata inf: myservermydata order mydata_after_ms_mystor_master Mandatory:my_mystor:promote mydata:start order myserver_after_mydata Mandatory: mydata:startmyserver:start order myserver_after_myip Mandatory: myip:startmyserver:start property cib-bootstrap-options: \ dc-version=1.1.11-97629de \ cluster-infrastructure="classic openais (with plugin)" \ expected-quorum-votes=2 \ stonith-enabled=false \ no-quorum-policy=ignore \ default-resource-stickiness=50 \ last-lrm-refresh=1433085584
彩色corosync配置示例：
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