本文主要包含heartbeat drbd mysql,drbd mysql,corosync,corosync pacemaker,corosync怎么读等服务器相关知识,网友希望可以进行参考
1、实验环境：
Node1：192.168.1.17RHEL5.8_32bit，web server）
Node2：192.168.1.18RHEL5.8_32bit，web server）
SteppingStone：192.168.1.19RHEL5.8_32bit）
VIP：192.168.1.20
2、准备工作
<1> 配置主机名
节点名称使用/etc/hosts解析；节点名称必须跟uname -n命令的执行结果一致
Node1：
# hostname node1.ikki.com # vim /etc/sysconfig/network HOSTNAME=node1.ikki.com
Node2：
# hostname node1.ikki.com # vim /etc/sysconfig/network HOSTNAME=node2.ikki.com
<2> 配置节点ssh基于密钥方式互相通信
Node1：
# ssh-keygen -t rsa # ssh-copy-id -i ~/.ssh/id_rsa.pub root@node2
Node2：
# ssh-keygen -t rsa # ssh-copy-id -i ~/.ssh/id_rsa.pub root@node1
<3> 配置各节点基于主机名互相通信
Node1&Node2：
# vim /etc/hosts 192.168.1.17 node1.ikki.com node1 192.168.1.18 node2.ikki.com node2
<4> 配置各节点时间同步
Node1&Node2：
# crontab -e */5 * * * * /sbin/ntpdate 202.120.2.101 &> /dev/null
<5> 配置跳板机SteppingStone）
与Node1和Node2建立ssh互信，且基于主机名通信：
# ssh-keygen -t rsa # ssh-copy-id -i ~/.ssh/id_rsa.pub root@node1 # ssh-copy-id -i ~/.ssh/id_rsa.pub root@node2 # vim /etc/hosts 192.168.1.17 node1.ikki.com node1 192.168.1.18 node2.ikki.com node2
制作同步远程执行命令的step脚本工具：
# vim step
#!/bin/bash
if [ $# -eq 1 ]; then
for I in {1..2}; do
ssh node$I $1;
done
else
echo "Usage:step 'COMMANDs'"
fi
# chmod +x step
# mv step /usr/sbin<6> Node1和Node2两个节点上各提供了一个大小相同的分区作为drbd设备
为各个节点上创建LVM逻辑卷，大小为1G
# fdisk /dev/sda n --> e --> n --> +1G --> w # partprobe /dev/sda
3、安装内核模块和管理工具
安装最新的8.3的版本：
drbd83-8.3.15-2.el5.centos.i386.rpm
kmod-drbd83-8.3.15-3.el5.centos.i686.rpm
在SteppingStone上执行远程安装：
# step 'yum -y --nogpgcheck localinstall drbd83-8.3.8-1.el5.centos.i386.rpm kmod-drbd83-8.3.8-1.el5.centos.i686.rpm'
4、配置drbdNode1）
<1> 复制样例文件为配置文件：
# cp /usr/share/doc/drbd83-8.3.8/drbd.conf /etc
<2> 配置/etc/drbd.d/global-common.conf
global {
usage-count no; # 禁用信息统计
# minor-count dialog-refresh disable-ip-verification
}
common {
protocol C; # 默认使用同步协议
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
}
disk {
on-io-error detach; # 当磁盘IO错误时执行分离
# on-io-error fencing use-bmbv no-disk-barrier no-disk-flushes
# no-disk-drain no-md-flushes max-bio-bvecs
}
net {
# sndbuf-size rcvbuf-size timeout connect-int ping-int ping-timeout max-buffers
# max-epoch-size ko-count allow-two-primaries cram-hmac-alg shared-secret
# after-sb-0pri after-sb-1pri after-sb-2pri data-integrity-alg no-tcp-corki
cram-hmac-alg "sha1"; # 同步时验证所使用的算法
shared-secret "mydrbd7788"; # 共享的密码
}
syncer {
rate 200M; # 同步速率
# rate after al-extents use-rle cpu-mask verify-alg csums-alg
}
}<3> 定义一个资源/etc/drbd.d/mydrbd.res，内容如下：
resource mydrbd {
device /dev/drbd0;
disk /dev/sda5;
meta-disk internal;
on node1.ikki.com {
address 192.168.1.17:7789;
}
on node2.ikki.com {
address 192.168.1.18:7789;
}
}将以上配置的文件全部同步至另外一个节点
# scp -r /etc/drbd.* node2:/etc
5、在两个节点上初始化已定义的资源并启动服务：
<1> 初始化资源Node1和Node2）：
# drbdadm create-md web
<2> 启动服务Node1和Node2）：
# /etc/init.d/drbd start
<3> 查看启动状态Node1）：
# cat /proc/drbd
version: 8.3.15 (api:88/proto:86-97)
GIT-hash: 0ce4d235fc02b5c53c1c52c53433d11a694eab8c build by mockbuild@builder17.centos.org, 2013-03-27 16:04:08
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:b oos:987896<4> 将当前节点设置为主节点Node1）
# drbdadm -- --overwrite-data-of-peer primary mydrbd
注：适用于初次设置
再次查看状态：
# drbd-overview 0:mydrbd Connected Primary/Secondary UpToDate/UpToDate C r-----
注：Primary/Secondary：当前节点/另一节点
6、创建文件系统并挂载主节点Node1）
文件系统的挂载只能在Primary节点进行，因此在主节点上对drbd设备进行格式化：
# mke2fs -j /dev/drbd0 # mkdir /mydata # mount /dev/drbd0 /mydata
7、切换主从节点进行测试
Node1:
# cp /etc/inittab /mydata # umount /mydata # drbdadm secondary mydrbd # drbd-overview 0:mydrbd Connected Secondary/Secondary UpToDate/UpToDate C r-----
Node2:
# drbdadm primary mydrbd # drbd-overview 0:mydrbd Connected Primary/Secondary UpToDate/UpToDate C r----- # mkdir /mydata # mount /dev/drbd0 /mydata # ls /mydata
8、配置openais/corosync+pacemaker
<1> 安装corosync和pacemakerSteppingStone）
# cd /root/corosync/
# ls
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
heartbeat-3.0.3-2.3.el5.i386.rpm
heartbeat-libs-3.0.3-2.3.el5.i386.rpm
libesmtp-1.0.4-5.el5.i386.rpm
pacemaker-1.1.5-1.1.el5.i386.rpm
pacemaker-libs-1.1.5-1.1.el5.i386.rpm
resource-agents-1.0.4-1.1.el5.i386.rpm
# step 'mkdir /root/corosync'
# for I in {1..2};do scp *.rpm node$I:/root/corosync;done
# step 'yum -y --nogpgcheck localinstall /root/corosync/*.r