ha.cf文件设置了heartbeat的检验机制，没有执行机制。Haresources用来设置当主服务器出现问题时heartbeat的执行机制。其内容为：当主服务器宕机后，该怎样进行切换操作。切换内容通常有IP地址的切换、服务的切换、共享存储的切换，从而使从服务器具有和主服务器同样的IP、SERVICE、SHARESTORAGE，从而使client没有察觉。在两个HA节点上该文件必须完全一致。
-----------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".
# 这文件下面有很多的选 项，你必须设置的有节点列表集{node ...}，{serial,bcast,mcast,或ucast}中的一个，auto_failback的值
#
# ATTENTION: As the configuration file is read line by line,
# THE ORDER OF DIRECTIVE MATTERS!
# 注意：配置文件是逐行读取的，并且选项的顺序是会影响最终结果的。
#
# 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.
# 特别注意，确保 udpport,serial baud rate等配置在心跳检测媒体（heartbeat media）前！他们将影响debug和log file指令。
# 也就是是在定义网卡，串口等心跳检测接口前先要定义端口号。
#
# All will be fine if you keep them ordered as in this example.
# 如果你保持他们在此例子中的顺序的话一切都不会有问 题。
#
# 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".
# 记录日志方面的注意事项：
# 如果debugfile,logfile和logfacility都没 有定义，日志记录就相当于use_logd yes。否则，他们将分别生效。如果要阻止记录日志到syslog，那么logfacility必须设置为“none”
#
# File to write debug messages to
# 写入debug消息的文件
#debugfile /var/log/ha-debug
#
#
# File to write other messages to
# 写 入其他消息的文件
#logfile /var/log/ha-log
#
#
# Facility to use for syslog()/logger
# 用于syslog()/logger的设备
logfacility local0
#
#
# A note on specifying "how long" times below...
# 在下面指定多长时间时应该注意
# The default time unit is seconds
# 缺省的时间单位是秒
# 10 means ten seconds
# 10 就代表10秒
#
# You can also specify them in milliseconds
# 1500ms means 1.5 seconds
# 你也可以指定他们以毫秒为单位
# 1500ms表示 1.5秒
#
# keepalive: how long between heartbeats?
# keepalive: 在heartbeat之间连接保持多久
#keepalive 2
#
# deadtime: how long-to-declare-host-dead?
# deadtime：
# 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.
# 如果这个时间值设置得太低可能会导致出现很难判断的问题，如何使用warntime来调节 deadtime请查看FAQ。
#
#deadtime 30
#
# warntime: how long before issuing "late heartbeat" warning?
# See the FAQ for how to use warntime to tune deadtime.
#
#warntime 10
#
#
# 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.
# 在某些机器/操作系统等中，网络在机器重启后需要花一定的时间启动并正常工作。因此我们必须分开他们初次起来的dead time，这个值应该最少设置为两倍的正常dead time。
#
#initdead 120
#
#
# What UDP port to use for bcast/ucast communication?
# 用于bacst/ucast通讯的UDP 端口
#
#udpport 694
#
# Baud rate for serial ports...
# 串口的 波特率
#baud 19200
#
# serial serialportname ...
# serial 串口名称
#serial /dev/ttyS0 # Linux
#serial /dev/cuaa0 # FreeBSD
#serial /dev/cuad0 # FreeBSD 6.x
#serial /dev/cua/a # Solaris
#
#
# What interfaces to broadcast heartbeats over?
# 广播heartbeats的接口
#
#bcast eth0 # Linux
#bcast eth1 eth2 # Linux
#bcast le0 # Solaris
#bcast le1 le2 # Solaris
#
# Set up a multicast heartbeat medium
# 设置一个多 播心跳介质
# mcast [dev] [mcast group] [port] [ttl] [loop]
#
# [dev] device to send/rcv heartbeats on 发送/接收heartbeats的设备
# [mcast group] multicast group to join (class D multicast address 224.0.0.0 - 239.255.255.255) 加入到的多播组（D类多播地址224.0.0.0 - 239.255.255.255）
# [port] udp port to sendto/rcvfrom udp(set this value to the same value as "udpport" above) 端口用于发送/接收udp（设置这个值跟上面的udpport为相同值）
# [ttl] the ttl value for outbound heartbeats. this effects how far the multicast packet will propagate. (0-255) Must be greater than zero.
# 外流的 heartbeats的ttl值。这个影响多播包能传播多远。（0-255）必须要大于0 。
# [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.
# 为多播heartbeat开关loopback。如 果enabled，一个外流的包将被回环到原处并由发送它的接口接收。（0或者1）设置这个值为0。
#
#mcast eth0 225.0.0.1 694 1 0
#
# Set up a unicast / udp heartbeat medium
# 配 置一个unicast / udp heartbeat 介质
# ucast [dev] [peer-ip-addr]
#
# [dev] device to send/rcv heartbeats on 用于发送/接收heartbeat的设备
# [peer-ip-addr] IP address of peer to send packets to 包被发送到的对等的IP地址
#
#ucast eth0 192.168.1.2
#
#
# About boolean values...
# 关于boolean值
# Any of the following case-insensitive values will work for true:
# 下面的非大 小写敏感的值将认为是true：
# true, on, yes, y, 1
# Any of the following case-insensitive values will work for false:
# 下面的非大小写敏感的值将认为是false：
# false, off, no, n, 0
#
#
#
# auto_failback: determines whether a resource will
# automatically fail back to its "primary" node, or remain
# on whatever node is serving it until that node fails, or
# an administrator intervenes.
# auto_failback: 决定一个resource是否自动恢复到它的primary节点，或者不管什么节点，都继续运行在上面直到节点出现故障或管# 理员进行干预。
#
#
# The possible values for auto_failback are:
# auto_failback 的可能值有：
# on - enable automatic failbacks
# on - 允许自动failbacks
# off - disable automatic failbacks
# off - 禁止自动failbacks
# legacy - enable automatic failbacks in systems where all nodes do not yet support the auto_failback option.
# legacy - 在所有节点都还不支持auto_failback的选项中允许自动failbacks
# auto_failback "on" and "off" are backwards compatible with the old "nice_failback on" setting.
# auto_failback "on"和"off"向后兼容旧的"nice_failback on"设置。
#
# See the FAQ for information on how to convert from "legacy" to "on" without a flash cut.
# (i.e., using a "rolling upgrade" process)
# 查看FAQ获取如何从"legacy"转为到"on"并不会闪断的 信息。
#
#
# The default value for auto_failback is "legacy", which
# will issue a warning at startup. So, make sure you put
# an auto_failback directive in your ha.cf file.
# (note: auto_failback can be any boolean or "legacy")
# 缺省的auto_failback值是“legacy”，它在启动的时候会 发送一个警告。因此，确保你在ha.cf文件中配置了auto_failback指令。
#
auto_failback on
#
#
# Basic STONITH support
# Using this directive assumes that there is one stonith
# device in the cluster. Parameters to this device are
# read from a configuration file. The format of this line is:
# 基本上STONITH支持
# 使用这个指令假设有一个stonith设备在集群中。这个设备的参数 从一个配置文件中读取，这行的格式是：
#
# stonith
#
# NOTE: it is up to you to maintain this file on each node in the
# cluster!
# 注意：在集群中的每个节点上的这个文 件都靠你去维护。
#
#stonith baytech /etc/ha.d/conf/stonith.baytech
#
# STONITH support
# You can configure multiple stonith devices using this directive.
# 你可以使用这个指令配置多个stonith设备：
# The format of the line is:
# 这行的格式是：
# stonith_host
#
# is the machine the stonith device is attached to or * to mean it is accessible from any host.
# 表示stonith设备联结到的机器或者用*来表示从任何主机都可以访问。
# is the type of stonith device (a list of supported drives is in /usr/lib/stonith.)
# 是stonith设备的类型（支持的设备的列表在/usr/lib/stonith中）
# are driver specific parameters. To see the format for a particular device, run:
# 是驱动指定的参数，要查看特定设备的格式，运行：
# stonith -l -t
#
#
# Note that if you put your stonith device access information in
# here, and you make this file publically readable, you're asking
# for a denial of service attack ;-)
# 需要注意如果你将你的stonith设备的访问信息放在这里，并且你让这个文件开放读权限，那么你是在召唤一个DoS攻 击。
#
# To get a list of supported stonith devices, run
# 要得到支持的 stonith设备的列表，运行
# stonith -L
#
# For detailed information on which stonith devices are supported
# and their detailed configuration options, run this command:
# 要哪个stonith设备是支持的详细信息和它们详细的 配置选项，运行这个命令：
# stonith -h
#
#stonith_host * baytech 10.0.0.3 mylogin mysecretpassword
#stonith_host ken3 rps10 /dev/ttyS1 kathy 0
#stonith_host kathy rps10 /dev/ttyS1 ken3 0
#
# Watchdog is the watchdog timer. If our own heart doesn't beat for
# a minute, then our machine will reboot.
# Watchdog是一个watchdog计时器，如果我们的心 超过一分钟不跳，我们的机器将会reboot。
#
# NOTE: If you are using the software watchdog, you very likely
# wish to load the module with the parameter "nowayout=0" or
# compile it without CONFIG_WATCHDOG_NOWAYOUT set. Otherwise even
# an orderly shutdown of heartbeat will trigger a reboot, which is
# very likely NOT what you want.
# 注意：如果你使用软件watchdog，你很可能希望用参数“nowayout=0”来加载这个模块或编译它的时候去掉
# CONFIG_WATCHDOG_NOWAYOUT 设置。否则，即使一个有序的关闭heartbeat也会触发重启，这很可能不是你想要的。
#
#watchdog /dev/watchdog
#
# Tell what machines are in the cluster
# 说 明说明机器在这个集群里面
# node nodename ... -- must match uname -n
# node nodename ... --必须要匹配uname -n
#node ken3
#node kathy
#
# Less common options...
# 非常用的选项
# 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
# 将10.10.10.254看成一个伪集群成员，与下面的 ipfail一起使用。
# 注意：不要使用一个集群节点作为ping节点
#
#ping 10.10.10.254
#
# Treats 10.10.10.254 and 10.10.10.253 as a psuedo-cluster-member
# called group1. If either 10.10.10.254 or 10.10.10.253 are up
# then group1 is up
# Used together with ipfail below...
# 将 10.10.10.254和10.10.10.254看成一个叫group1的伪集群成员。如果10.10.10.254或10.10.10.253是 up的，那么group1为up
# 与下面的ipfail一起使用。
#
#ping_group group1 10.10.10.254 10.10.10.253
#
# HBA ping derective for Fiber Channel
# Treats fc-card-name as psudo-cluster-member
# used with ipfail below ...
# 用 于Fiber Channel的HBA ping指令，将fc-card-name看成是伪集群成员，与下面的ipfail一起使用。
#
# You can obtain HBAAPI from http://hbaapi.sourceforge.net. You need
# to get the library specific to your HBA directly from the vender
# To install HBAAPI stuff, all You need to do is to compile the common
# part you obtained from the sourceforge. This will produce libHBAAPI.so
# which you need to copy to /usr/lib. You need also copy hbaapi.h to
# /usr/include.
# 你可以从http://hbaapi.sourceforge.net获 取HBAAPI，你需要从vender获得用于你的HBA指令的特定的库来安装HBAAPI。
# 你所需要做的是编译你从sourceforge 获得的通用部分，它会生成libHBAAPI.so，然后你要将它拷贝到/usr/lib目录。同时
# 你也要吧hbaapi.h拷贝到/usr /include 。
#
# The fc-card-name is the name obtained from the hbaapitest program
# that is part of the hbaapi package. Running hbaapitest will produce
# a verbose output. One of the first line is similar to:
# Apapter number 0 is named: qlogic-qla2200-0
# Here fc-card-name is qlogic-qla2200-0.
# fc-card-name是从hbaapitest程序获取的名字，它 是hbaapi包的一部分。运行hbaapitest将生成一个冗长的输出，其中第一行类似：
# Apapter number 0 is named: qlogic-qla2200-0
# 在这里fc-card-name是qlogic-qla2200-0
#
#hbaping fc-card-name
#
#
# Processes started and stopped with heartbeat. Restarted unless
# they exit with rc=100
# 与heartbeat 一起启动和停止的进程。重启，除非它们的以rc=100退出。
#
#respawn userid /path/name/to/run
#respawn hacluster /usr/lib/heartbeat/ipfail
#
# Access control for client api
# default is no access
# 用于客户端api的访问控制，缺省为不可访问。
#
#apiauth client-name gid=gidlist uid=uidlist
#apiauth ipfail gid=haclient uid=hacluster
###########################
#
# Unusual options.
# 非常选项
###########################
#
# hopfudge maximum hop count minus number of nodes in config
#hopfudge 1
#
# deadping - dead time for ping nodes 上面设置的用来ping的节点的死亡时间
#deadping 30
#
# hbgenmethod - Heartbeat generation number creation method，Normally these are stored on disk and incremented as needed.
# hbgenmethod - Heartbeat产生数字的生产方法。通常执行存储在磁盘上并在需要时进行增量。
#
#hbgenmethod time
#
# realtime - enable/disable realtime execution (high priority, etc.) defaults to on
# realtime - 允许/禁止实时执行（高优先级）缺省为on
#realtime off
#
# debug - set debug level .defaults to zero
# debug - 设置debug等级，缺省为0
#debug 1
#
# API Authentication - replaces the fifo-permissions-based system of the past
# APT认证 - 代替以前的fifo-permission-base系统
#
# You can put a uid list and/or a gid list.If you put both, then a process is authorized if it qualifies under either the uid list, or under the gid list.
# 可以放上一个uid列表和/或gid列表。如果两个都放，那么符合uid列表或gid列表中的进程都将通过验证
#
#
# The groupname "default" has special meaning. If it is specified, then
# this will be used for authorizing groupless clients, and any client groups
# not otherwise specified.
# 组名“default”有特定的意思。如果它被指定，那么它将用于验证无组的客户端和任何没有另 外指定的客户组
#
# There is a subtle exception to this. "default" will never be used in the
# following cases (actual default auth directives noted in brackets)
# 这是一个复杂的表达式，“default”将从不用于下面的情况（现实中缺省的 验证指令记录在括号中）
# ipfail (uid=HA_CCMUSER)
# ccm (uid=HA_CCMUSER)
# ping (gid=HA_APIGROUP)
# cl_status (gid=HA_APIGROUP)
#
# This is done to avoid creating a gaping security hole and matches the most likely desired configuration.
# 它 避免生成一个安全漏洞缺口并匹配到了可能很多人最渴望的配置。
#
#apiauth ipfail uid=hacluster
#apiauth ccm uid=hacluster
#apiauth cms uid=hacluster
#apiauth ping gid=haclient uid=alanr,root
#apiauth default gid=haclient
# message format in the wire, it can be classic or netstring,
# default: classic
# 网线中的信息格式，可以是classic或netstring
#
#msgfmt classic/netstring
#
# Do we use logging daemon?
# If logging daemon is used, logfile/debugfile/logfacility in this file
# are not meaningful any longer. You should check the config file for logging
# daemon (the default is /etc/logd.cf)
# more infomartion can be fould in http://www.linux-ha.org/ha_2ecf_2fUseLogdDirective
# Setting use_logd to "yes" is recommended
# 我们是否使用记录监控？
# 如果使用了记录监控，此文件里面的 logfile/debugfile/logfacility将不再有意义。你应该检查在配置文件中是否有记录监控（缺省为/etc/logd.cf）
# 更 多的信息可以在http://www.linux-ha.org/ha_2ecf_2fUseLogdDirective中 找到。推荐配置use_logd为yes。
#
# use_logd yes/no
#
# the interval we reconnect to logging daemon if the previous connection failed
# default: 60 seconds
# 如果前一个连接失败了，我们再次连接到记录监控器的间隔。
#conn_logd_time 60
#
#
# Configure compression module
# It could be zlib or bz2, depending on whether u have the corresponding
# library in the system.
# 配置压缩模块
# 它可 以为zlib或bz2，基于我们的系统中是否有相应的库。
#
#compression bz2
#
# Confiugre compression threshold
# This value determines the threshold to compress a message,
# e.g. if the threshold is 1, then any message with size greater than 1 KB
# will be compressed, the default is 2 (KB)
# 配置压缩的限度
# 这个值决定压缩一个信息的限度，例如：如果限度为1，那么任何大于1KB的消息都会被压缩，缺省为 2（KB）
#compression_threshold 2
