通過HA實現服務器的高可用性，即通過corosync+drbd+pacemaker實現mysql服務器的高可用集群。
?
案例應用實現主要步驟：
一．準備工作：
二、DRBD安裝配置步驟
三、mysql安裝與配置
四、corosync+pacemaker的安裝和配置?
五、集群管理
?
?
實現詳細步驟：
一．準備工作：
1.1?修改node1.magedu.com主機名，IP地址和系統時間
[root@node1?~]#?hostname??node1.magedu.com?[root@node1?~]#?cat?/etc/sysconfig/network?NETWORKING=yes?NETWORKING_IPV6=no?HOSTNAME=node1.magedu.com?[root@node1?~]#?hwclock?-s?[root@node1?~]#?date?Tue?Feb?7?20:24:22?CST?2012??[root@node1?~]#?[root@node1?~]#?setup? [root@node1?~]#?service?network?restart?Shutting?down?interface?eth0:?[?OK?]?Shutting?down?loopback?interface:?[?OK?]?Bringing?up?loopback?interface:?[?OK?]?Bringing?up?interface?eth0:?[?OK?]?[root@node1?~]#?ifconfig?eth0?eth0?Link?encap:Ethernet?HWaddr?00:0C:29:AE:83:D1??inet?addr:192.168.101.81?Bcast:192.168.101.255?Mask:255.255.255.0?
1.2?修改node2.magedu.com主機名，IP地址和系統時間
[root@node2?~]#?hostname??node2.magedu.com?[root@node2?~]#?cat?/etc/sysconfig/network?NETWORKING=yes?NETWORKING_IPV6=no?HOSTNAME=node2.magedu.com?[root@node2?~]#?hwclock?-s?[root@node2?~]#?date?Tue?Feb?7?20:25:49?CST?2012??[root@node2?~]#?[root@node2?~]#?setup?
[root@node2?~]#?service?network?restart?Shutting?down?interface?eth0:?[?OK?]?Shutting?down?loopback?interface:?[?OK?]?Bringing?up?loopback?interface:?[?OK?]?Bringing?up?interface?eth0:?[?OK?]?[root@node2?~]#?ifconfig?eth0?eth0?Link?encap:Ethernet?HWaddr?00:0C:29:D1:D4:32??inet?addr:192.168.101.82?Bcast:192.168.101.255?Mask:255.255.255.0?
1.3?在node1和node2上配置hosts文件和ssh密鑰信息
有利于以后在一個節點對另一節點直接操作。
1.3.1?在node1上修改/etc/hosts文件
[root@node1?~]#?echo?"192.168.101.81?node1.magedu.com?node1"?>>/etc/hosts?[root@node1?~]#?echo?"192.168.101.82?node2.magedu.com?node2"?>>/etc/hosts?
1.3.1?在node1上修改/etc/hosts文件
[root@node2?~]#?echo?"192.168.101.81?node1.magedu.com?node1"?>>/etc/hosts?[root@node2?~]#?echo?"192.168.101.82?node2.magedu.com?node2"?>>/etc/hosts?
1.3.3?在node1上配置ssh密鑰信息
[root@node1?~]#?ssh-keygen?-t?rsa?#一直輸入空格?[root@node1?~]#?ssh-copy-id?-i?.ssh/id_rsa.pub?root@node2.magedu.com?
1.3.4?在node2上配置ssh密鑰信息
[root@node2?~]#?ssh-keygen?-t?rsa?#一直輸入空格?[root@node2?~]#?ssh-copy-id?-i?.ssh/id_rsa.pub?root@node1.magedu.com?[root@node2?~]#?ssh?node1?'ifconfig'?#將看到node2上的信息?The?authenticity?of?host?'node1?(192.168.101.81)'?can't?be?established.?RSA?key?fingerprint?is?d4:f1:06:3b:a0:81:fd:85:65:20:9e:a1:ee:46:a6:8b.?Are?you?sure?you?want?to?continue?connecting?(yes/no)??yes?Warning:?Permanently?added?'node1'?(RSA)?to?the?list?of?known?hosts.?eth0?Link?encap:Ethernet?HWaddr?00:0C:29:AE:83:D1??inet?addr:192.168.101.81?Bcast:192.168.101.255?Mask:255.255.255.0? 1.4?下載相關軟件包：（這里我將下載的軟件包放在/root/ha/下面了，共18個）
[root@node1?~]#?cd?ha/?[root@node1?ha]#?cluster-glue-1.0.6-1.6.el5.i386.rpm?cluster-glue-libs-1.0.6-1.6.el5.i386.rpm?corosync-1.2.7-1.1.el5.i386.rpm?corosynclib-1.2.7-1.1.el5.i386.rpm?drbd83-8.3.8-1.el5.centos.i386.rpm?heartbeat-3.0.3-2.3.el5.i386.rpm?heartbeat-libs-3.0.3-2.3.el5.i386.rpm?kmod-drbd83-8.3.8-1.el5.centos.i686.rpm?ldirectord-1.0.1-1.el5.i386.rpm?libesmtp-1.0.4-5.el5.i386.rpm?mysql-5.5.15-linux2.6-i686.tar.gz?openais-1.1.3-1.6.el5.i386.rpm?openaislib-1.1.3-1.6.el5.i386.rpm?pacemaker-1.1.5-1.1.el5.i386.rpm?pacemaker-cts-1.1.5-1.1.el5.i386.rpm?pacemaker-libs-1.1.5-1.1.el5.i386.rpm?perl-TimeDate-1.16-5.el5.noarch.rpm?resource-agents-1.0.4-1.1.el5.i386.rpm?這里不需要ldirectord-1.0.1-1.el5.i386.rpm，故將其刪除?[root@node1?ha]#?rm?ldirectord-1.0.1-1.el5.i386.rpm??rm:?remove?regular?file?`ldirectord-1.0.1-1.el5.i386.rpm'??y?[root@node1?ha]#?ssh?node2?'mkdir?/root/ha'?[root@node1?ha]#?scp?*.rpm?node2:/root/ha/#將相關軟件包移動到node2上?[root@node1?ha]#?scp?*.rpm?node2:/root/ha/?cluster-glue-1.0.6-1.6.el5.i386.rpm?100%?265KB?265.0KB/s?00:00??cluster-glue-libs-1.0.6-1.6.el5.i386.rpm?100%?130KB?130.1KB/s?00:00??corosync-1.2.7-1.1.el5.i386.rpm?100%?166KB?166.1KB/s?00:00??corosynclib-1.2.7-1.1.el5.i386.rpm?100%?155KB?154.8KB/s?00:00??drbd83-8.3.8-1.el5.centos.i386.rpm?100%?217KB?216.7KB/s?00:00??heartbeat-3.0.3-2.3.el5.i386.rpm?100%?162KB?161.7KB/s?00:00??heartbeat-libs-3.0.3-2.3.el5.i386.rpm?100%?283KB?282.8KB/s?00:00??kmod-drbd83-8.3.8-1.el5.centos.i686.rpm?100%?123KB?123.0KB/s?00:00??libesmtp-1.0.4-5.el5.i386.rpm?100%?59KB?59.0KB/s?00:00??openais-1.1.3-1.6.el5.i386.rpm?100%?202KB?202.2KB/s?00:00??openaislib-1.1.3-1.6.el5.i386.rpm?100%?92KB?92.4KB/s?00:00??pacemaker-1.1.5-1.1.el5.i386.rpm?100%?778KB?778.1KB/s?00:00??pacemaker-cts-1.1.5-1.1.el5.i386.rpm?100%?203KB?203.1KB/s?00:00??pacemaker-libs-1.1.5-1.1.el5.i386.rpm?100%?324KB?324.2KB/s?00:00??perl-TimeDate-1.16-5.el5.noarch.rpm?100%?32KB?32.1KB/s?00:00??resource-agents-1.0.4-1.1.el5.i386.rpm?100%?380KB?379.5KB/s?00:00??[root@node1?ha]#?scp?mysql-5.5.15-linux2.6-i686.tar.gz?node2:/root/ha/?mysql-5.5.15-linux2.6-i686.tar.gz?100%?155MB?10.3MB/s?00:15?
1.5?配置本地yum數據庫
?
[root@node1?ha]#??[root@node1?ha]#?mkdir?/mnt/cdrom/?[root@node1?ha]#?mount?/dev/cdrom?/mnt/cdrom/?mount:?block?device?/dev/cdrom?is?write-protected,?mounting?read-only?[root@node1?ha]#?yum?list?all?[root@node1?ha]#??[root@node1?ha]#?scp?/etc/yum.repos.d/server.repo?node2:/etc/yum.repos.d/?server.repo?100%?647?0.6KB/s?00:00??[root@node1?ha]#?[root@node1?ha]#?ssh?node2?'mkdir?/mnt/cdrom/'?[root@node1?ha]#?ssh?node2?'mount?/dev/cdrom?/mnt/cdrom/'?[root@node1?ha]#?ssh?node2?'yum?list?all'?
1.6?在node1上新增磁盤
[root@node1?ha]#?cd?[root@node1?~]#?fdisk?-l??Disk?/dev/sda:?21.4?GB,?21474836480?bytes?255?heads,?63?sectors/track,?2610?cylinders?Units?=?cylinders?of?16065?*?512?=?8225280?bytes??Device?Boot?Start?End?Blocks?Id?System?/dev/sda1?*?1?13?104391?83?Linux?/dev/sda2?14?1318?10482412+?83?Linux?/dev/sda3?1319?1579?2096482+?82?Linux?swap?/?Solaris?[root@node1?~]#?fdisk?/dev/sda?p/n/p//+1000M/p/w?[root@node1?~]#?fdisk?-l??Disk?/dev/sda:?21.4?GB,?21474836480?bytes?255?heads,?63?sectors/track,?2610?cylinders?Units?=?cylinders?of?16065?*?512?=?8225280?bytes??Device?Boot?Start?End?Blocks?Id?System?/dev/sda1?*?1?13?104391?83?Linux?/dev/sda2?14?1318?10482412+?83?Linux?/dev/sda3?1319?1579?2096482+?82?Linux?swap?/?Solaris?/dev/sda4?1580?1702?987997+?83?Linux?[root@node1?~]#?partprobe?/dev/sda?[root@node1?~]#?cat?/proc/partitions??major?minor?#blocks?name??8?0?20971520?sda?8?1?104391?sda1?8?2?10482412?sda2?8?3?2096482?sda3?8?4?987997?sda4?[root@node1?~]#? 1.7?在node2上新增磁盤
[root@node2?ha]#?cd?[root@node2?~]#?fdisk?-l??Disk?/dev/sda:?21.4?GB,?21474836480?bytes?255?heads,?63?sectors/track,?2610?cylinders?Units?=?cylinders?of?16065?*?512?=?8225280?bytes??Device?Boot?Start?End?Blocks?Id?System?/dev/sda1?*?1?13?104391?83?Linux?/dev/sda2?14?1318?10482412+?83?Linux?/dev/sda3?1319?1579?2096482+?82?Linux?swap?/?Solaris?[root@node2?~]#?fdisk?/dev/sda?p/n/p//+1000M/p/w?[root@node2?~]#?fdisk?-l??Disk?/dev/sda:?21.4?GB,?21474836480?bytes?255?heads,?63?sectors/track,?2610?cylinders?Units?=?cylinders?of?16065?*?512?=?8225280?bytes??Device?Boot?Start?End?Blocks?Id?System?/dev/sda1?*?1?13?104391?83?Linux?/dev/sda2?14?1318?10482412+?83?Linux?/dev/sda3?1319?1579?2096482+?82?Linux?swap?/?Solaris?/dev/sda4?1580?1702?987997+?83?Linux?[root@node2?~]#?partprobe?/dev/sda?[root@node2?~]#?cat?/proc/partitions??major?minor?#blocks?name??8?0?20971520?sda?8?1?104391?sda1?8?2?10482412?sda2?8?3?2096482?sda3?8?4?987997?sda4?[root@node2?~]#? 二、DRBD安裝配置步驟
在node1和node2做以下操作：
我下載的軟件包是：（我放在/root/ha/下了）
drbd83-8.3.8-1.el5.centos.i386.rpm?
kmod-drbd83-8.3.8-1.el5.centos.i686.rpm
2.1、安裝DRBD?套件
[root@node1?~]#?cd?ha/?[root@node1?ha]#?ls?[root@node1?ha]#?yum?localinstall?-y?drbd83-8.3.8-1.el5.centos.i386.rpm?kmod-drbd83-8.3.8-1.el5.centos.i686.rpm?–nogpgcheck?...?Installed:?drbd83.i386?0:8.3.8-1.el5.centos?kmod-drbd83.i686?0:8.3.8-1.el5.centos??Complete!?[root@node1?ha]#?cd??[root@node2?~]#?cd?ha/?[root@node2?ha]#?ls?[root@node2?ha]#?yum?localinstall?-y?drbd83-8.3.8-1.el5.centos.i386.rpm?kmod-drbd83-8.3.8-1.el5.centos.i686.rpm?–nogpgcheck?...?Installed:?drbd83.i386?0:8.3.8-1.el5.centos?kmod-drbd83.i686?0:8.3.8-1.el5.centos??Complete!?[root@node2?ha]#?cd? 2.2、加載DRBD?模塊
[root@node1?~]#?modprobe?drbd?[root@node1?~]#?lsmod?|grep?drbd?drbd?228528?0??[root@node1?~]#??[root@node1?~]#?ssh?node2?'modprobe?drbd'?[root@node1?~]#?ssh?node2?'lsmod?|grep?drbd'?drbd?228528?0??[root@node1?~]#?
2.3、修改配置文件?
drbd.conf配置文件DRBD運行時,會讀取一個配置文件/etc/drbd.conf.這個文件里描述了DRBD設備與硬盤分區的映射關系
2.3.1?在node1上以下配置
[root@node1?~]#?cp?/usr/share/doc/drbd83-8.3.8/drbd.conf?/etc/?cp:?overwrite?`/etc/drbd.conf'??y?[root@node1?~]#?cat?/etc/drbd.conf??#?You?can?find?an?example?in?/usr/share/doc/drbd.../drbd.conf.example??include?"drbd.d/global_common.conf";?include?"drbd.d/*.res";?[root@node1?~]#?cd?/etc/drbd.d/?[root@node1?drbd.d]#?ll?total?4?-rwxr-xr-x?1?root?root?1418?Jun?4?2010?global_common.conf?[root@node1?drbd.d]#?cp?global_common.conf?global_common.conf.bak?#修改全局配置文件（說明略）?[root@node1?drbd.d]#?vim?global_common.conf?global?{?usage-count?yes;?}?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";?}?startup?{?wfc-timeout?120;?degr-wfc-timeout?100;?}?disk?{?on-io-error?detach;?}?net?{?cram-hmac-alg?"sha1";?shared-secret?"mydrbd123";?}?syncer?{?rate?100M;?}?}?#修改資源配置文件（說明略）?[root@node1?drbd.d]#?vim?/etc/drbd.d/mysql.res??resource?mysql?{?on?node1.magedu.com?{?device?/dev/drbd0;?disk?/dev/sda4;?address?192.168.101.81:7898;?meta-disk?internal;?}?on?node2.magedu.com?{?device?/dev/drbd0;?disk?/dev/sda4;?address?192.168.101.82:7898;?meta-disk?internal;?}?}? 2.3.2?復制配置到node2上：
[root@node1?drbd.d]#?scp?/etc/drbd.conf?node2:/etc/?drbd.conf?100%?133?0.1KB/s?00:00??[root@node1?drbd.d]#?scp?/etc/drbd.d/*?node2:/etc/drbd.d/?global_common.conf?100%?682?0.7KB/s?00:00??global_common.conf.bak?100%?1418?1.4KB/s?00:00??mysql.res?100%?468?0.5KB/s?00:00?
2.4、?檢測配置文件,?創建nfs?的資源?
//分別在node1和node2上初始化定義的mysql的資源?
//檢測配置文件（兩次執行如下命令)
在node1上：
[root@node1?drbd.d]#?drbdadm?adjust?mysql?--==?Thank?you?for?participating?in?the?global?usage?survey?==--?The?server's?response?is:??0:?Failure:?(119)?No?valid?meta-data?signature?found.??==>?Use?'drbdadm?create-md?res'?to?initialize?meta-data?area.?<==??Command?'drbdsetup?0?disk?/dev/sda4?/dev/sda4?internal?--set-defaults?--create-device?--on-io-error=detach'?terminated?with?exit?code?10??[root@node1?drbd.d]#?drbdadm?adjust?mysql?drbdsetup?0?show:5:?delay-probe-volume?0k?=>?0k?out?of?range?[4..1048576]k.?[root@node1?drbd.d]#?drbdadm?create-md?mysql?Writing?meta?data...?initializing?activity?log?NOT?initialized?bitmap?New?drbd?meta?data?block?successfully?created.?[root@node1?drbd.d]#?ll?/dev/drbd0?brw-r-----?1?root?disk?147,?0?Feb?7?20:44?/dev/drbd0?在node2上：?[root@node2?~]#?drbdadm?create-md?mysql??--==?Thank?you?for?participating?in?the?global?usage?survey?==--?The?server's?response?is:??Writing?meta?data...?initializing?activity?log?NOT?initialized?bitmap?New?drbd?meta?data?block?successfully?created.??[root@node2?~]#?ll?/dev/drbd0?brw-rw----?1?root?root?147,?0?Feb?7?20:47?/dev/drbd0? 2.5??啟動DRBD服務，查看DRBD狀態?
[root@node1?drbd.d]#?service?drbd?start?Starting?DRBD?resources:?[??mysql?Found?valid?meta?data?in?the?expected?location,?1011703808?bytes?into?/dev/sda4.?d(mysql)?s(mysql)?n(mysql)?]......??[root@node2?~]#?service?drbd?start?Starting?DRBD?resources:?[??mysql?Found?valid?meta?data?in?the?expected?location,?1011703808?bytes?into?/dev/sda4.?d(mysql)?s(mysql)?n(mysql)?].??[root@node1?drbd.d]#?service?drbd?status?drbd?driver?loaded?OK;?device?status:?version:?8.3.8?(api:88/proto:86-94)?GIT-hash:?d78846e52224fd00562f7c225bcc25b2d422321d?build?by?mockbuild@builder10.centos.org,?2010-06-04?08:04:16?m:res?cs?ro?ds?p?mounted?fstype?0:mysql?Connected?Secondary/Secondary?Inconsistent/Inconsistent?C?[root@node1?drbd.d]#?drbd-overview??0:mysql?Connected?Secondary/Secondary?Inconsistent/Inconsistent?C?r----??[root@node2?~]#?service?drbd?status?drbd?driver?loaded?OK;?device?status:?version:?8.3.8?(api:88/proto:86-94)?GIT-hash:?d78846e52224fd00562f7c225bcc25b2d422321d?build?by?mockbuild@builder10.centos.org,?2010-06-04?08:04:16?m:res?cs?ro?ds?p?mounted?fstype?0:mysql?Connected?Secondary/Secondary?Inconsistent/Inconsistent?C?[root@node2?~]#?drbd-overview?0:mysql?Connected?Secondary/Secondary?Inconsistent/Inconsistent?C?r----? 2.6??設置DRBD的主節點：
從上面的信息中可以看出此時兩個節點均處于Secondary狀態。于是，我們接下來需要將其中一個節點設置為Primary，這里將node1設置為主節點，故要在node1上執行如下命令：可以看到文件同步過程。
[root@node1?drbd.d]#?drbdadm?--?--overwrite-data-of-peer?primary?mysql??[root@node1?drbd.d]#?drbd-overview??0:mysql?SyncSource?Primary/Secondary?UpToDate/Inconsistent?C?r----??[===>................]?sync'ed:?23.6%?(761048/987928)K?delay_probe:?20?[root@node1?drbd.d]#?drbd-overview??0:mysql?SyncSource?Primary/Secondary?UpToDate/Inconsistent?C?r----??[========>...........]?sync'ed:?47.6%?(522296/987928)K?delay_probe:?42?[root@node1?drbd.d]#?[root@node1?drbd.d]#?drbd-overview??0:mysql?Connected?Primary/Secondary?UpToDate/UpToDate?C?r----?[root@node1?drbd.d]#?[root@node1?drbd.d]#?cat?/proc/drbd??version:?8.3.8?(api:88/proto:86-94)?GIT-hash:?d78846e52224fd00562f7c225bcc25b2d422321d?build?by?mockbuild@builder10.centos.org,?2010-06-04?08:04:16?0:?cs:Connected?ro:Primary/Secondary?ds:UpToDate/UpToDate?C?r----?ns:987928?nr:0?dw:0?dr:987928?al:0?bm:61?lo:0?pe:0?ua:0?ap:0?ep:1?wo:b?oos:0?[root@node1?drbd.d]#???[root@node2?~]#?drbd-overview?0:mysql?SyncTarget?Secondary/Primary?Inconsistent/UpToDate?C?r----??[=====>..............]?sync'ed:?32.7%?(670680/987928)K?queue_delay:?0.1?ms?[root@node2?~]#?drbd-overview?0:mysql?SyncTarget?Secondary/Primary?Inconsistent/UpToDate?C?r----??[===========>........]?sync'ed:?61.6%?(384536/987928)K?queue_delay:?11.6?ms?[root@node2?~]#?[root@node2?~]#?drbd-overview?0:mysql?Connected?Secondary/Primary?UpToDate/UpToDate?C?r----??[root@node2?~]#?[root@node2?~]#?cat?/proc/drbd?version:?8.3.8?(api:88/proto:86-94)?GIT-hash:?d78846e52224fd00562f7c225bcc25b2d422321d?build?by?mockbuild@builder10.centos.org,?2010-06-04?08:04:16?0:?cs:Connected?ro:Secondary/Primary?ds:UpToDate/UpToDate?C?r----?ns:0?nr:987928?dw:987928?dr:0?al:0?bm:61?lo:0?pe:0?ua:0?ap:0?ep:1?wo:b?oos:0? 注：Primary/Secondary?說明當前節點為主節點；Secondary/Primary?說明當前節點為從節點。使用：watch -n 1 'cat /proc/drbd'查看同步過程！
2.7?創建文件系統（只可以在primary節點上進行，這里在node1上創建）?
[root@node1?drbd.d]#?mkfs?-t?ext3?/dev/drbd0?[root@node1?drbd.d]#?mkdir?-pv?/mnt/mysqldata?mkdir:?created?directory?`/mnt/mysqldata'?[root@node1?drbd.d]#?ssh?node2?'mkdir?-pv?/mnt/mysqldata'?mkdir:?created?directory?`/mnt/mysqldata'?[root@node1?drbd.d]#?mount?/dev/drbd0?/mnt/mysqldata/?[root@node1?drbd.d]#?[root@node1?drbd.d]#?cd?/mnt/mysqldata/?[root@node1?mysqldata]#?ll?total?16?drwx------?2?root?root?16384?Feb?7?21:26?lost+found?[root@node1?mysqldata]#?echo?"123"?>f1?[root@node1?mysqldata]#?touch?f2?[root@node1?mysqldata]#?ll?total?20?-rw-r--r--?1?root?root?4?Feb?7?21:28?f1?-rw-r--r--?1?root?root?0?Feb?7?21:28?f2?drwx------?2?root?root?16384?Feb?7?21:26?lost+found?[root@node1?mysqldata]#?
2.8將node2設置為primary節點?
[root@node1?mysqldata]#?cd?[root@node1?~]#?umount?/mnt/mysqldata/?[root@node1?~]#?drbdadm?secondary?mysql?[root@node1?~]#?drbd-overview??0:mysql?Connected?Secondary/Secondary?UpToDate/UpToDate?C?r----??[root@node1?~]#?將node2設置為primary節點?[root@node2?~]#?drbd-overview??0:mysql?Connected?Secondary/Secondary?UpToDate/UpToDate?C?r----??[root@node2?~]#?drbdadm?primary?mysql?[root@node2?~]#?drbd-overview??0:mysql?Connected?Primary/Secondary?UpToDate/UpToDate?C?r----??[root@node2?~]#?mount?/dev/drbd0?/mnt/mysqldata/?[root@node2?~]#?cd?/mnt/mysqldata/?[root@node2?mysqldata]#?ll?total?20?-rw-r--r--?1?root?root?4?Feb?7?21:28?f1?-rw-r--r--?1?root?root?0?Feb?7?21:28?f2?drwx------?2?root?root?16384?Feb?7?21:26?lost+found?
此處看到在node1上創建的文件在這里都顯示了，
最后將node2的/mnt/mysqldata/卸載
[root@node2 mysqldata]# cd?
[root@node2 ~]# umount /mnt/mysqldata/
至此DRBD配置成功！！！
?
?
轉載于:https://blog.51cto.com/qcbetter/960688
總結
以上是生活随笔為你收集整理的mysql服务器的HA集群之corosync+drbd+pacemaker实现 上的全部內容，希望文章能夠幫你解決所遇到的問題。
如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。
