drbd配置和报错

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环境：redhat 6.5 内核：2.6.32-431.el6.x86_64（drbd对内核有要求，如果不匹配会报错）

node1:192.168.1.61

node2:192.168.1.67

两台服务器都加了一块900Ghdd盘

1.首先把两台服务器名字修改

vim /etc/host

192.168.1.61 node1
192.168.1.67 node2

vim /etc/sysconfig/network

NETWORKING=yes
HOSTNAME=node2

2.把900G硬盘分区并格式化

fdisk /dev/sdb（n-p-1-回车-回车-m）

mkfs.ext4 /dev/sdb1

reboot

3.yum install -y kernel-devel kernel-headers flex

从官网上下载drbd-8.4.3.tar.gz包www.drbd.org

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/2.6.32-431.el6.x86_64/

make install

cp /usr/local/drbd/etc/rc.d/init/d/drbd /etc/rc.d/init.d/

chkconfig --add drbd

chkconfig drbd on

cd drbd

make clean

make KDIR=/usr/src/kernels/2.6.32-431.el6.x86_64/

cp drbd.ko /lib/modules/`uname -r`/kernel/lib

nodprobe drbd

lsmod | grep drbd （查看drbd模块加载是否成功）

drbd 325658 3
libcrc32c 1246 1 drbd

4.配置文件

cd /usr/local/drbd/etc

cat 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";

主配置文件里面已经包含了全局配置文件和drbd目录下以.res结尾的文件

cd drbd.d

vim global_common.conf

global {
usage-count yes; #是否参加drbd的使用者统计，默认此选项为yes
# minor-count dialog-refresh disable-ip-verification
}
common {
protocol C; #使用drbd的同步协议
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# wfc-timeout degr-wfc-timeout outdated-wfc-timeout wait-after-sb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 {
on-io-error detach; #配置I/O错误处理策略为分离
# size max-bio-bvecs 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
}
net {

allow-two-primaries yes;
after-sb-0pri discard-zero-changes;
after-sb-1pri discard-secondary;
after-sb-2pri disconnect; (红色部分可以不用添加；如果添加为双主模式)
# 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
}
syncer {
rate 1024M; #设置主备节点同步时的网络速率
}
}

vim drbd.res （添加该配置文件）
resource r1 { #这个r1是定义资源的名字
on node1 { #on开头，后面是主机名称
device /dev/drbd0; #drbd设备名称
disk /dev/sdb1; #drbd0使用的磁盘分区为sdb1
address 192.168.1.61:7789; #设置drbd监听地址与端口
meta-disk internal;
}
on node2 {
device /dev/drbd0;
disk /dev/sdb1;
address 192.168.1.67:7789;
meta-disk internal;
}
}

5.初始化资源

drbdadm create-md r1

Writing meta data...
initializing activity log
NOT initializing bitmap
New drbd meta data block successfully created.
success

service drbd start

Starting DRBD resources: [
create res: r1
prepare disk: r1
adjust disk: r1
adjust net: r1
]
.

netstat -anput|grep 7789

tcp 0 0 192.168.1.67:7789 192.168.1.61:46249 ESTABLISHED -
tcp 0 0 192.168.1.67:37779 192.168.1.61:7789 ESTABLISHED -

到此已完成drbd的安装配置

6.drbd一些常见的报错

Q1:drbdadm create-md r1: exited with coolcode 40？

执行drbdadm create-md r1时出现如下信息

open(/dev/sdb1) failed: No such file or directory
Command 'drbdmeta 0 v08 /dev/sdb1 internal create-md' terminated with exit coolcode 20
drbdadm create-md r1: exited with coolcode 40

原因：没有fdisk /dev/sdb建立分区

Q2:执行drbdadm create-md r1出现

Failure: (104) Can not open backing device.

Command 'drbdsetup attach 1 /dev/sdb1 /dev/sdb1 internal' terminated with exit code 10

原因：可能硬盘有raid信息，进入webbios清除raid信息，重新安装系统

Q3:挂载drbd分区mount /dev/drbd0 /ceshi

mount: you must specify the filesystem type

原因：查看当前节点状态drbdadm role r1

Secondary/Secondary

如果都为Secondary修改当前状态

drbdadm primary r1

备节点没有权限挂载修改drbd分区

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