利发国际lifa222 » 利发国际lifa222 » Linux » CentOS6.5下DRBD+HeartBeat+NFS配置(一)

CentOS6.5下DRBD+HeartBeat+NFS配置(一)

 

DRBD配置

Distributed Replicated Block Device(DRBD)是一个用软件实现的、无共享的、服务器之间镜像块设备内容的存储复制解决方案。
 
我们可以理解为它其实就是个网络Raid 1,两台服务器间就算某台因断电或宕机也不会对数据有任何影响,而真正的热切换可以通过Heartbeat方案解决,不需要人工干预。
 
一、环境描述
系统版本:centos6.6 x64(内核2.6.32-504.16.2.el6.x86_64)
DRBD版本:DRBD-8.4.3
 
node1(主节点)IP: 192.168.0.191 主机名:drbd1.corp.com
node2(从节点)IP: 192.168.0.192 主机名:drbd2.corp.com
 
(node1) 仅为主节点配置
(node2) 仅为从节点配置
(node1,node2) 为主从节点共同配置
 
二、安装前准备:(node1,node2)
1、关闭iptables和SELINUX,避免安装过程中报错。
1 2 3 4 5 6 7 # service iptables stop # chkconfig iptables off # setenforce 0 # vi /etc/selinux/config --------------- SELINUX=disabled ---------------
2、配置hosts文件
1 2 3 # vi /etc/hosts 192.168.0.191  drbd1.corp.com 192.168.0.192  drbd2.corp.com
3、在两台虚拟机分别添加一块10G硬盘分区作为DRBD设备磁盘,分别都为sdb1,大小10G,并在本地系统创建/store目录,不做挂载操作。
1 2 3 4 5 # fdisk /dev/sdb ---------------- n-p-1-1-"+10G"-w ---------------- # mkdir /store
4、时间同步:
1 # ntpdate -u asia.pool.ntp.org
三、DRBD的安装配置:
1、安装依赖包:(node1,node2)
1 # yum install gcc gcc-c++ make glibc flex kernel-devel kernel-headers
2、安装DRBD:(node1,node2)
1 2 3 4 5 6 7 8 9 10 # wget http://oss.linbit.com/drbd/8.4/drbd-8.4.3.tar.gz # tar zxvf drbd-8.4.3.tar.gz # cd drbd-8.4.3 # ./configure --prefix=/usr/local/drbd --with-km # make KDIR=/usr/src/kernels/2.6.32-504.16.2.el6.x86_64/ # make install # mkdir -p /usr/local/drbd/var/run/drbd # cp /usr/local/drbd/etc/rc.d/init.d/drbd /etc/rc.d/init.d # chkconfig --add drbd # chkconfig drbd on
3、加载DRBD模块:(node1,node2)
1 # modprobe drbd
查看DRBD模块是否加载到内核:
1 2 3 # lsmod |grep drbd drbd 310172 4 libcrc32c 1246 1 drbd
4、参数配置:(node1,node2)
1 # vi /usr/local/drbd/etc/drbd.conf
清空文件内容,并添加如下配置:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 resource r0{ protocol C;   startup { wfc-timeout 0; degr-wfc-timeout 120;} disk { on-io-error detach;} net{ timeout 60; connect-int 10; ping-int 10; max-buffers 2048; max-epoch-size 2048; } syncer { rate 200M;}   on drbd1.corp.com{ device /dev/drbd0; disk /dev/sdb1; address 192.168.0.191:7788; meta-disk internal; } on drbd2.corp.com{ device /dev/drbd0; disk /dev/sdb1; address 192.168.0.192:7788; meta-disk internal; } }
注:请修改上面配置中的主机名、IP、和disk为自己的具体配置
 
5、创建DRBD设备并激活r0资源:(node1,node2)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 # mknod /dev/drbd0 b 147 0 # drbdadm create-md r0   等待片刻,显示success表示drbd块创建成功 Writing meta data... initializing activity log NOT initializing bitmap New drbd meta data block successfully created.   --== Creating metadata ==-- As with nodes, we count the total number of devices mirrored by DRBD at http://usage.drbd.org.   The counter works anonymously. It creates a random number to identify the device and sends that random number, along with the kernel and DRBD version, to usage.drbd.org.   http://usage.drbd.org/cgi-bin/insert_usage.pl?   nu=716310175600466686&ru=15741444353112217792&rs=1085704704   * If you wish to opt out entirely, simply enter 'no'. * To continue, just press [RETURN]   success
再次输入该命令:
1 2 3 4 5 6 7 8 # drbdadm create-md r0 成功激活r0 [need to type 'yes' to confirm] yes   Writing meta data... initializing activity log NOT initializing bitmap New drbd meta data block successfully created.
6、启动DRBD服务:(node1,node2)
1 # service drbd start
注:需要主从共同启动方能生效
 
7、查看状态:(node1,node2)
1 2 3 4 5 6 # service drbd status drbd driver loaded OK; device status: version: 8.4.3 (api:1/proto:86-101) GIT-hash: 89a294209144b68adb3ee85a73221f964d3ee515 build by root@drbd1.corp.com, 2015-05-12 21:05:41 m:res cs ro ds p mounted fstype 0:r0 Connected Secondary/Secondary Inconsistent/Inconsistent C
这里ro:Secondary/Secondary表示两台主机的状态都是备机状态,ds是磁盘状态,显示的状态内容为“Inconsistent不一致”,这是因为DRBD无法判断哪一方为主机,应以哪一方的磁盘数据作为标准。
 
8、将drbd1.example.com主机配置为主节点:(node1)
1 # drbdsetup /dev/drbd0 primary --force
分别查看主从DRBD状态:
(node1)
1 2 3 4 5 6 # service drbd status drbd driver loaded OK; device status: version: 8.4.3 (api:1/proto:86-101) GIT-hash: 89a294209144b68adb3ee85a73221f964d3ee515 build by root@drbd1.corp.com, 2015-05-12 21:05:41 m:res cs ro ds p mounted fstype 0:r0 Connected Primary/Secondary UpToDate/UpToDate C
(node2)
1 2 3 4 5 6 # service drbd status drbd driver loaded OK; device status: version: 8.4.3 (api:1/proto:86-101) GIT-hash: 89a294209144b68adb3ee85a73221f964d3ee515 build by root@drbd2.corp.com, 2015-05-12 21:05:46 m:res cs ro ds p mounted fstype 0:r0 Connected Secondary/Primary UpToDate/UpToDate C
ro在主从服务器上分别显示 Primary/Secondary和Secondary/Primary
ds显示UpToDate/UpToDate
表示主从配置成功。
 
9、挂载DRBD:(node1)
从刚才的状态上看到mounted和fstype参数为空,所以我们这步开始挂载DRBD到系统目录/store
1 2 # mkfs.ext4 /dev/drbd0 # mount /dev/drbd0 /store
注:Secondary节点上不允许对DRBD设备进行任何操作,包括挂载;所有的读写操作只能在Primary节点上进行,只有当Primary节点挂掉时,Secondary节点才能提升为Primary节点,并自动挂载DRBD继续工作。
 
成功挂载后的DRBD状态:(node1)
1 2 3 4 5 6 # service drbd status drbd driver loaded OK; device status: version: 8.4.3 (api:1/proto:86-101) GIT-hash: 89a294209144b68adb3ee85a73221f964d3ee515 build by root@drbd1.corp.com, 2015-05-12 21:05:41 m:res cs ro ds p mounted fstype 0:r0 Connected Primary/Secondary UpToDate/UpToDate C /store ext4
原文链接:CentOS6.5下DRBD+HeartBeat+NFS配置(一),转载请注明来源!
1