Heartbeat+DRBD+NFS

添加路由心跳线

master:
# route add -host 10.20.23.111  dev eth2
# echo "/sbin/route add -host 10.20.23.111  dev eth2" >>/ect/rc.local

backup
# route add -host 10.20.23.115  dev eth2
# echo "/sbin/route add -host 10.20.23.115  dev eth2" >>/ect/rc.local

配置heartbeat

1、安装heartbeat(主备操作一致)
# yum install heartbeat*

2、配置文件
1) 主配置文件
# cat >/etc/ha.d/ha.cf<<EOF
  debugfile /var/log/ha-debug
  logfile /var/log/ha-log
  logfacility local0
  keepalive 2
  deadtime 30
  warntime 10
  initdead 60
  mcast eth1 225.0.0.1 694 1 0
  auto_failback on
  node master
  node backup
EOF
2) 认证配置
# cat >/etc/ha.d/authkeys <<EOF
  auth 1
  1 sha1 c4f9375f9834b4e7f0a528cc65c055702bf5f24a
EOF
# chmod 600 /etc/ha.d/authkeys
3) 资源配置
# cat >/etc/ha.d/haresources <<EOF
  master    IPaddr::10.0.0.73/25/eth0  
EOF

3、启动主的heartbeat
# /etc/init.d/heartbeat start

4、查看vip
# ip add|grep 10.0.0.

5、测试
# /etc/init.d/heartbeat stop                #停掉主
# ip add|grep 10.0.0.                       #查看备vip

6、主备切换
# /usr/share/heartbeat/hb_standby
# /usr/share/heartbeat/hb_takeover

配置drbd

1、主备各添加一块5G磁盘
2、对新磁盘进行分区
# fdisk -l
# parted /dev/sdb mklabel gpt                       #调整分区表
# parted /dev/sdb mkpart primary ext4 0 1000        #增加一个分区
# parted /dev/sdb mkpart primary ext4 1001 -1       #增加一个分区
# parted /dev/sdb p                                 #查看分区结果

3、格式化
# mkfs.ext4 /dev/sdb1
# tune2fs -c -1 /dev/sdb1                           #取消磁盘检查

4、安装DRBD软件
# yum install drbd  kmod-drbd84 -y
# modprobe drbd                                     #加载到内核
# lsmod | grep drbd

5、开机加载到内核
# echo "modprobe drbd" >>/etc/rc.local
# echo "modprobe drbd" >/etc/sysconfig/modules/drbd.modules     
# chmod 755 /etc/sysconfig/modules/drbd.modules

6、编辑配置文件(主备配置一致)
# vim drbd.conf
  global {
      usage-count no;                               #是否参加DRBD使用者统计,默认是yes
  }   
  common {   
    syncer {
         rate 100M;                                 #主备网络速率
         verify-alg crc32c;
    }
  }   
  # primary
  for 
  drbd1
  resource data {                                   #data是资源名字
    protocol C;                                     #协议   
    disk {                                          #磁盘错误控制
      on-io-error   detach;                         #分离
    }
    on master {                                     #节点hostname
      device    /dev/drbd0;
      disk      /dev/sdb1;                          #drbd0对应的磁盘
      address   10.0.0.82:7788;                     #监听地址,心跳IP
      meta-disk /dev/sdb2[0];                       #存放meta信息
    }
    on backup {  
      device     /dev/drbd0;
      disk       /dev/sdb1;
      address    10.0.0.83:7788;
      meta-disk  /dev/sdb2[0];
    }
  }

7、初始化drbd  
# drbdadm create-md data
# drbdadm up all 或  # /etc/init.d/drbd start
  
8、查看状态
# cat /proc/drbd
# /etc/init.d/drbd status
  
9、同步DRBD数据
# drbdadm -- --overwrite-data-of-peer primary data
  
10、挂载drbd
# mount /dev/drbd0 /data

配置nfs

1、安装nfs
# yum install -y rpcbind nfs-utils

2、配置nfs共享目录
# cat  /etc/exports
  /data  10.0.0.0/24(rw,sync,all_squash)

3、启动rpcbind和nfs服务
# /etc/init.d/rpcbind start; chkconfig rpcbind off
# /etc/init.d/nfs start; chkconfig nfs off 

4、查看并挂载
# rpcinfo -p 127.0.0.1                #查看状态
# showmount -e 10.0.0.72
# mount -t nfs 10.0.0.72:/data /data/data1
# df -h

整合Heartbeat、DRBD和NFS服务

1、修改heartbeat配置文件
# vim haresources
  master  drbddisk::data Filesystem::/dev/drbd0::/data::ext4 nfsd IPaddr::10.0.0.72/25/eth0

2、编辑管理nfs脚本
# vim /etc/ha.d/resource.d/nfsd
  #!/bin/bash  
    case $1 in
  start)  
      /etc/init.d/nfs restart  
      ;;  
  stop)  
     for proc in rpc.mountd rpc.rquotad nfsd nfsd   
        do 
              killall -9
  $proc  
     done 
      ;;  
  esac  
# chmod +x /etc/ha.d/resource.d/nfsd

3、测试nfs高可用
# /etc/init.d/heartbeat stop
# /etc/init.d/heartbeat start
NFS有2分钟左右的延迟,通过编写脚本,umount和mount命令控制