基於heartbeat的NFS HA實現
Version: 1.0
Maintainer: hutuworm
Update: 2003-09-30
※系統說明
本系統由兩台Dell PowerEdge 2650（HUTUNFS1 & HUTUNFS2）和一台磁盤陣列組成，磁盤陣列
劃分為ld0 & ld1兩個RAID5邏輯盤（Logical Disk）。操作系統為RedHat 7.3 Linux。設置NFS HA
的目的是，當HUTUNFS1失敗時HUTUNFS2自動接管。
1 安裝heartbeat 1.0.3 for RedHat 7.3
http://www.ultramonkey.org/download/heartbeat/1.0.3/redhat_7.3/
heartbeat-1.0.3-1.rh.7.3.1.i386.rpm
heartbeat-lDirectord-1.0.3-1.rh.7.3.1.i386.rpm
heartbeat-pils-1.0.3-1.rh.7.3.1.i386.rpm
heartbeat-stonith-1.0.3-1.rh.7.3.1.i386.rpm
2 設置配置文件:
HUTUNFS1為master，HUTUNFS2為slave。
2.1 HUTUNFS1 192.168.0.30
/etc/ha.d/ha.cf
# define nodes in cluster
node hutunfs1
node hutunfs2
# time a system must be unreachable before considered dead (seconds)
deadtime 5
# set up for the serial heartbeat pulse
# 如果兩台服務器之間用心跳線連接，heartbeat支持串行心跳監測。
#serial /dev/ttyS0
#baud 19200
# interface to run the network heartbeat pulse
udp bond0
/etc/ha.d/authkeys
auth 3
3 md5 hutuworm
/etc/ha.d/haresources
hutunfs1 192.168.0.30 Filesystem::/dev/sdc1::/ld0::ext3 nfslock nfs
hutunfs1 192.168.0.30 Filesystem::/dev/sdd1::/ld1::ext3 nfslock nfs
/etc/eXPorts
#
# Export the shared disk, allowing read/write Access and
# synchronous I/O with no write delay.
/ld0 192.168.0.*(rw,sync,no_wdelay)
/ld1 192.168.0.*(rw,sync,no_wdelay)
/etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 hutunfs1 localhost.localdomain localhost
192.168.0.30 hutunfs1
192.168.0.31 hutunfs2
2.2 HUTUNFS2 192.168.0.31
/etc/ha.d/ha.cf
/etc/ha.d/authkeys
/etc/ha.d/haresources
/etc/exports
以上四個文件與HUTUNFS1相同
/etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 hutunfs2 localhost.localdomain localhost
192.168.0.30 hutunfs1
192.168.0.31 hutunfs2
3. 在HUTUNFS1 & HUTUNFS2上運行ntsysv，確認nfs服務關閉，heartbeat服務打開。
先重起HUTUNFS1，再重起HUTUNFS2，HUTUNFS1作為master運行，HUTUNFS2作為slave運行。
當HUTUNFS1失效時，HUTUNFS2將自動接管192.168.0.30，並同時開啟NFS服務。
