系统版本：centos6.4最小化
node1:192.168.31.111
node2:192.168.31.112
编译环境：yum -y groupinstall "Development tools" "Server Platform Development"
drbd版本：drbd-8.4.7-1.tar.gz、drbd-utils-8.9.5.tar.gz
前提条件：
1、节点node1、node2基于ssh互信
2、节点之间时间同步
3、节点名称与hostname（uname -n）一致，不要使用dns解析
详细看操作：
node1：
ssh-keygen -t rsa -f ~/.ssh/id_rsa -P ''
ssh-copy-id -i .ssh/id_rsa.pub [email protected]
node2:
ssh-keygen -t rsa -f ~/.ssh/id_rsa -P ''
ssh-copy-id -i .ssh/id_rsa.pub [email protected]
yum -y install rdate
rdate -s time-b.nist.gov
crontab -u root -e
*/2 * * * * /usr/bin/rdate -s time-b.nist.gov
vim /etc/hosts
192.168.31.111 node1
192.168.31.112 node2
hostname node1
vim /etc/sysconfig/network
HOSTNAME=node1
vim /etc/hosts
192.168.31.111 node1
192.168.31.112 node2
hostname node2
vim /etc/sysconfig/network
HOSTNAME=node2
准备操作搞定于是编译安装drbd：
为了避免编译过程遇到的错误，先安装下依赖包
yum -y install libxslt docbook-style-xsl
tar xf drbd-8.4.7-1.tar.gz
cd drbd-8.4.7-1
make && make install
cd /root
tar xf drbd-utils-8.9.5.tar.gz
cd drbd-utils-8.9.5
./configure --prefix=/usr/local/drbd --sysconfdir=/etc/
make && make install
modprobe drbd
lsmod |grep drbd
#########################################################
为我的系统加上一块5G的磁盘（node1和node2分别加上）
node1：
fdisk /dev/sdb
p,n,p,1,+3G,w
partx /dev/sdb
node2同理
配置drbd文件：
三个配置文件：
/etc/drbd.conf,/etc/drbd.d/global_common.conf,再就是自己创建的资源配置文件/etc/drbd.d/web.res
vi global_common.conf
global {
usage-count yes;
# minor-count dialog-refresh disable-ip-verification
# cmd-timeout-short 5; cmd-timeout-medium 121; cmd-timeout-long 600;
}
common {
handlers {
# These are EXAMPLE handlers only.
# They may have severe implications,
# like hard resetting the node under certain circumstances.
# Be careful when chosing your poison.
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 degr-wfc-timeout outdated-wfc-timeout wait-after-sb
}
options {
# cpu-mask on-no-data-accessible
}
disk {
# size on-io-error fencing disk-barrier disk-flushes
# disk-drain md-flushes resync-rate resync-after al-extents
# c-plan-ahead c-delay-target c-fill-target c-max-rate
# c-min-rate disk-timeout
on-io-error detach;
}
net {
# protocol timeout max-epoch-size max-buffers unplug-watermark
# connect-int ping-int sndbuf-size rcvbuf-size ko-count
# allow-two-primaries cram-hmac-alg shared-secret after-sb-0pri
# after-sb-1pri after-sb-2pri always-asbp rr-conflict
# ping-timeout data-integrity-alg tcp-cork on-congestion
# congestion-fill congestion-extents csums-alg verify-alg
# use-rle
cram-hmac-alg "sha1";
shared-secret "mydrbdlab";
}
}
资源配置文件：
vi web.res
resource web {
on node1 {
device /dev/drbd0;
disk /dev/sdb1;
address 192.168.31.111:7789;
meta-disk internal;
}
on node2 {
device /dev/drbd0;
disk /dev/sdb1;
address 192.168.31.112:7789;
meta-disk internal;
}
}
将在node1上配置好的文件传送到node2上
scp /etc/drbd.d/global_common.conf /etc/drbd.d/web.res node2:/etc/drbd.d/
由于两个节点现在都是初建立drbd于是进行初始化：
在node1和node2上分别执行：
drbdadm create-md web（web为资源名称）
在node1和node2上分别执行：
启动drbd
service drbd start
查看drbd状态：
cat /proc/drbd
[root@node1 drbd.d]#
[root@node1 drbd.d]# cat /proc/drbd
version: 8.4.6 (api:1/proto:86-101)
GIT-hash: 833d830e0152d1e457fa7856e71e11248ccf3f70 build by root@node1, 2016-05-13 20:06:11
0: cs:Connected ro:Secondary/Secondary ds:Inconsistent/Inconsistent C r-----
ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:3156604
可以看出两个节点目前都是secondary，于是将node1改变为primary，执行以下操作：
drbdsetup /dev/drbd0 primary -o（这个命令本人亲测在自己的系统出错）改用下面的命令替换这个
drbdadm -- --overwrite-data-of-peer primary web（web为资源名称）
watch -n 1 ‘cat /proc/drbd’：每一秒同步一次命令执行的结果
同步数据完成后再次查看cat /proc/drbd
[root@node1 drbd.d]# cat /proc/drbd
version: 8.4.6 (api:1/proto:86-101)
GIT-hash: 833d830e0152d1e457fa7856e71e11248ccf3f70 build by root@node1, 2016-05-13 20:06:11
0: cs:SyncSource ro:Primary/Secondary ds:UpToDate/Inconsistent C r-----
ns:1692760 nr:0 dw:0 dr:1693424 al:0 bm:0 lo:0 pe:2 ua:0 ap:0 ep:1 wo:f oos:1464956
[=========>..........] sync'ed: 53.7% (1464956/3156604)K
finish: 0:00:56 speed: 25,864 (17,804) K/sec
[root@node1 ~]# cat /proc/drbd
version: 8.4.6 (api:1/proto:86-101)
GIT-hash: 833d830e0152d1e457fa7856e71e11248ccf3f70 build by root@node1, 2016-05-13 20:06:11
0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r-----
ns:3272832 nr:0 dw:116228 dr:3157977 al:40 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
至此安装配置已经完成
接下来挂载刚刚的分区
mkdir /mnt/drbd
mke2fs -j /dev/drbd0
mount /dev/drbd0 /mnt/drbd
cd /mnt/drbd
[root@node1 drbd]# ls
lost+found
创建一个文件：dd if=/dev/zero of=/mnt/drbd/tmp.txt bs=10K count=20
[root@node1 drbd]# ls
lost+found tmp.txt
注意：只有primary节点才能挂载
于是为了验证从节点是否同步到了数据，该主节点必须卸载，然后让刚刚的从节点挂载上去查看
操作如下：
umount /mnt/drbd
drbdadm secondary web
cat /proc/drbd
[root@node1 ~]# cat /proc/drbd
version: 8.4.6 (api:1/proto:86-101)
GIT-hash: 833d830e0152d1e457fa7856e71e11248ccf3f70 build by root@node1, 2016-05-13 20:06:11
0: cs:Connected ro:Secondary/Secondary ds:UpToDate/UpToDate C r-----
ns:3273108 nr:0 dw:116504 dr:3158338 al:41 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
node2:
drbdadm primary web
[root@node2 mnt]# cat /proc/drbd
version: 8.4.6 (api:1/proto:86-101)
GIT-hash: 833d830e0152d1e457fa7856e71e11248ccf3f70 build by root@node2, 2016-05-13 20:12:04
0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r-----
ns:0 nr:3273108 dw:3273108 dr:664 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
mkdir /mnt/drbd
mount /dev/drbd0 /mnt/drbd
[root@node2 ~]# cd /mnt/drbd/
[root@node2 drbd]# ls
lost+found tmp.txt
可以清晰的查看到tmp.txt文件，至此同步数据完成