Heartbeat安装与配置

1、环境描述

  服务器A(主) 192.85.1.175

  服务器B(从) 192.85.1.176

  Mysql版本:5.1.61

       系统版本:System OS:ubuntu 10.10 X86

2.安装heartbeat

  1)安装heartbeat

sudo apt-get install heartbeat

   2)配置说明

    heartbeat的安装目录为/etc/ha.d目录下,

     安装完成后,需要三个配置文件,为 ha.cf,haresources,authkeys。

     此时目录下没有这三个文件,需要创建,我们可以在

   /usr/share/doc/heartbeat目录里找到ha.cf、haresources、authkeys三个文件,只需将其拷贝到

/etc/ha.d目录下,即可

*.gz文件,使用 gunzip 命令解压

3.175服务器配置信息:

(1)etc/hosts 文件内容:

192.85.1.175    primary # Added by NetworkManager

(2)ha.cf 文件内容:(主配置文件)

#
#	There are lots of options in this file.  All you have to have is a set
#	of nodes listed {"node ...} one of {serial, bcast, mcast, or ucast},
#	and a value for "auto_failback".
#
#	ATTENTION: As the configuration file is read line by line,
#		   THE ORDER OF DIRECTIVE MATTERS!
#
#	In particular, make sure that the udpport, serial baud rate
#	etc. are set before the heartbeat media are defined!
#	debug and log file directives go into effect when they
#	are encountered.
#
#	All will be fine if you keep them ordered as in this example.
#
#
#       Note on logging:
#       If all of debugfile, logfile and logfacility are not defined, 
#       logging is the same as use_logd yes. In other case, they are
#       respectively effective. if detering the logging to syslog,
#       logfacility must be "none".
#
#	File to write debug messages to
debugfile /var/log/ha-debug  #调试日志文件
#
#
# 	File to write other messages to
#
logfile	/var/log/ha-log  #系统运行日志文件
#
#
#	Facility to use for syslog()/logger 
#
logfacility	local0   # 日志记录等级
#
#
#	A note on specifying "how long" times below...
#
#	The default time unit is seconds
#		10 means ten seconds
#
#	You can also specify them in milliseconds
#		1500ms means 1.5 seconds
#
#
#	keepalive: how long between heartbeats?
#
keepalive 2  #心跳频率,2表示2秒;200ms则表示200毫秒
#
#	deadtime: how long-to-declare-host-dead?
#
#		If you set this too low you will get the problematic
#		split-brain (or cluster partition) problem.
#		See the FAQ for how to use warntime to tune deadtime.
#
deadtime 30  #节点死亡时间,就是过了10秒后还没有收到心跳就认为主节点死亡
#
#	warntime: how long before issuing "late heartbeat" warning?
#	See the FAQ for how to use warntime to tune deadtime.
#
warntime 10   #告警时间
#
#
#	Very first dead time (initdead)
#
#	On some machines/OSes, etc. the network takes a while to come up
#	and start working right after you've been rebooted.  As a result
#	we have a separate dead time for when things first come up.
#	It should be at least twice the normal dead time.
#
initdead 120 #初始化时间
#
#
#	What UDP port to use for bcast/ucast communication?
#
udpport	694  #心跳信息传递的udp端口

#
#	What interfaces to broadcast heartbeats over?
#
bcast	eth0		# Linux  #采用udp广播播来通知心跳,建议在备用节点不只一台时使用
#bcast	eth1 eth2	# Linux
#bcast	le0		# Solaris
#bcast	le1 le2		# Solaris
#
#	Set up a multicast heartbeat medium
#	mcast [dev] [mcast group] [port] [ttl] [loop]
#
#	[dev]		device to send/rcv heartbeats on
#	[mcast group]	multicast group to join (class D multicast address
#			224.0.0.0 - 239.255.255.255)
#	[port]		udp port to sendto/rcvfrom (set this value to the
#			same value as "udpport" above)
#	[ttl]		the ttl value for outbound heartbeats.  this effects
#			how far the multicast packet will propagate.  (0-255)
#			Must be greater than zero.
#	[loop]		toggles loopback for outbound multicast heartbeats.
#			if enabled, an outbound packet will be looped back and
#			received by the interface it was sent on. (0 or 1)
#			Set this value to zero.
#		
#
#bcast eth0 225.0.0.1 694 1 0
#
#	Set up a unicast / udp heartbeat medium
#	ucast [dev] [peer-ip-addr]
#
#	[dev]		device to send/rcv heartbeats on
#	[peer-ip-addr]	IP address of peer to send packets to
#
ucast eth0 192.85.1.175

auto_failback on  #如果主节点重新恢复过来,主节点将主动将资源抢占过来,如果为off,则只当备用节点当掉后,主节点才取回资源

watchdog /dev/watchdog  #看门狗。如果本节点在超过1分钟后还没有发出心跳,那么本节点自动重启
#       
#	Tell what machines are in the cluster
#	node	nodename ...	-- must match uname -n
node	 primary #主节点名称,与uname -n显示必须一致
node	 backup #备用节点名称
#
#	Less common options...
#
#	Treats 10.10.10.254 as a psuedo-cluster-member
#	Used together with ipfail below...
#	note: don't use a cluster node as ping node	
#
ping 192.85.1.1 #通过ping网关来监测心跳是否正常

(3) haresources  (资源配置文件)

primary   192.85.1.177/24http,mysql,phpmyadmin  #虚拟IP配置及对应的访问资源配置


(4) authkeys (认证信息配置文件)

#通讯密钥,两台机器上的文件内容必须完全一致

auth 3

3 md5 Hello

#authkeys需要设置读写权限:chmod 600 ./authkeys

4.176服务器配置信息:

(1)etc/hosts 文件内容:

192.85.1.176    backup # Added by NetworkManager

(2)ha.cf 文件内容:

#
#	There are lots of options in this file.  All you have to have is a set
#	of nodes listed {"node ...} one of {serial, bcast, mcast, or ucast},
#	and a value for "auto_failback".
#
#	ATTENTION: As the configuration file is read line by line,
#		   THE ORDER OF DIRECTIVE MATTERS!
#
#	In particular, make sure that the udpport, serial baud rate
#	etc. are set before the heartbeat media are defined!
#	debug and log file directives go into effect when they
#	are encountered.
#
#	All will be fine if you keep them ordered as in this example.
#
#
#       Note on logging:
#       If all of debugfile, logfile and logfacility are not defined, 
#       logging is the same as use_logd yes. In other case, they are
#       respectively effective. if detering the logging to syslog,
#       logfacility must be "none".
#
#	File to write debug messages to
debugfile /var/log/ha-debug  #调试日志文件
#
#
# 	File to write other messages to
#
logfile	/var/log/ha-log  #系统运行日志文件
#
#
#	Facility to use for syslog()/logger 
#
logfacility	local0   # 日志记录等级
#
#
#	A note on specifying "how long" times below...
#
#	The default time unit is seconds
#		10 means ten seconds
#
#	You can also specify them in milliseconds
#		1500ms means 1.5 seconds
#
#
#	keepalive: how long between heartbeats?
#
keepalive 2  #心跳频率,2表示2秒;200ms则表示200毫秒
#
#	deadtime: how long-to-declare-host-dead?
#
#		If you set this too low you will get the problematic
#		split-brain (or cluster partition) problem.
#		See the FAQ for how to use warntime to tune deadtime.
#
deadtime 30  #节点死亡时间,就是过了10秒后还没有收到心跳就认为主节点死亡
#
#	warntime: how long before issuing "late heartbeat" warning?
#	See the FAQ for how to use warntime to tune deadtime.
#
warntime 10   #告警时间
#
#
#	Very first dead time (initdead)
#
#	On some machines/OSes, etc. the network takes a while to come up
#	and start working right after you've been rebooted.  As a result
#	we have a separate dead time for when things first come up.
#	It should be at least twice the normal dead time.
#
initdead 120 #初始化时间
#
#
#	What UDP port to use for bcast/ucast communication?
#
udpport	694  #心跳信息传递的udp端口

#
#	What interfaces to broadcast heartbeats over?
#
bcast	eth0		# Linux  #采用udp广播播来通知心跳,建议在备用节点不只一台时使用
#bcast	eth1 eth2	# Linux
#bcast	le0		# Solaris
#bcast	le1 le2		# Solaris
#
#	Set up a multicast heartbeat medium
#	mcast [dev] [mcast group] [port] [ttl] [loop]
#
#	[dev]		device to send/rcv heartbeats on
#	[mcast group]	multicast group to join (class D multicast address
#			224.0.0.0 - 239.255.255.255)
#	[port]		udp port to sendto/rcvfrom (set this value to the
#			same value as "udpport" above)
#	[ttl]		the ttl value for outbound heartbeats.  this effects
#			how far the multicast packet will propagate.  (0-255)
#			Must be greater than zero.
#	[loop]		toggles loopback for outbound multicast heartbeats.
#			if enabled, an outbound packet will be looped back and
#			received by the interface it was sent on. (0 or 1)
#			Set this value to zero.
#		
#
#bcast eth0 225.0.0.1 694 1 0
#
#	Set up a unicast / udp heartbeat medium
#	ucast [dev] [peer-ip-addr]
#
#	[dev]		device to send/rcv heartbeats on
#	[peer-ip-addr]	IP address of peer to send packets to
#
ucast eth0 192.85.1.176

auto_failback on  #如果主节点重新恢复过来,主节点将主动将资源抢占过来,如果为off,则只当备用节点当掉后,主节点才取回资源

watchdog /dev/watchdog  #看门狗。如果本节点在超过1分钟后还没有发出心跳,那么本节点自动重启
#       
#	Tell what machines are in the cluster
#	node	nodename ...	-- must match uname -n
node	 primary #主节点名称,与uname -n显示必须一致
node	 backup #备用节点名称
#
#	Less common options...
#
#	Treats 10.10.10.254 as a psuedo-cluster-member
#	Used together with ipfail below...
#	note: don't use a cluster node as ping node	
#
ping 192.85.1.1 #通过ping网关来监测心跳是否正常

(3) haresources

primary   192.85.1.177/24http,mysql,phpmyadmin   #虚拟IP配置及对应的访问资源配置
 

(4) authkeys

#通讯密钥,两台机器上的文件内容必须完全一致

auth 3

3 md5 Hello

#authkeys需要设置读写权限:chmod 600 ./authkeys

 

5.HA服务的启动、关闭以及测试

启动HA: service heartbeat start  或  /etc/init.d/heartbeat

关闭HA; service heartbeat stop  或  /etc/init.d/heartbeat

系统在启动时已经自动把heartbeat加载了。

使用http服务测试 heartbeat

首先启动httpd服务

#service httpd start

编辑各自主机的测试用html文件,放到/var/www/html/目录下。

启动node1的heartbeat,并执行这个指令进行监控: heartbeat status

例如直接使用  http://192.85.1.177/phpmyadmin  ,可以登录管理数据库



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