baalchina

集群的作用有很多，比如HA(high availability)，比如负载均衡等。我这里只做HA，保证可用性。

 

软件用的是开源的heartbeat，http://www.linux-ha.org

安装详解：

下载软件包：

#wget http://hg.linux-ha.org/lha-2.1/archive/STABLE-2.1.4.tar.bz2

 

解压编译并安装

 

 

#./ConfigureMe configure

#make

#make install

 

可能会少很多软件包，一个个打上就行了。我的CentOS 5.3，安装的时候自定义只选择开发工具，需要以下的包：

#yum install libnet
#yum install glib2-devel
#yum install libxml2-devel(这个没说，但是后面是需要的)

#yum install PyXML

 

另外需要注意的是，如果他告诉你缺某个包，你yum之后，重新make还是会报错的，需要重新./configure再make。这点比较诡异。

扫尾搞定配置文件

cp doc/ha.cf /etc/ha.d/
cp doc/haresources /etc/ha.d/
cp doc/authkeys /etc/ha.d/
cp ldirectord/ldirectord.cf /etc/ha.d/

 

服务的启动、停止等

 

/etc/rc.d/init.d/heartbeat start | stop | restert| status

 

安装的Troubleshooting

 

configure: WARNING: The following recommended components noted earlier are missing:
     uuid library, Python.h, security/pam_appl.h, gnutls/gnutls.h, gnutls/gnutls.h
    We will continue but you may have lost some non-critical functionality.
configure: error: The following required components noted earlier are missing:
     glib2-devel, libnet
    Please supply them and try again.

./bootstrap exiting due to error (sorry!).

这个是缺少包了。把几个包yum一下就行了。

题外话：

libnet也可以自己编译，这个比较诡异。

wget http://ncu.dl.sourceforge.net/project/libnet/libnet/0.10.11/libnet-0.10.11.tar.gz
cd libnet
cp makfiles/linux.mak port.mak(注意是makfile不是makefile啊)

 

#yum install hearbeat

提示如下：

Installing:
heartbeat               i386       2.1.3-3.el5.centos       extras       1.7 M
Installing for dependencies:
PyXML                   i386       0.8.4-4                  base         1.1 M
heartbeat-pils          i386       2.1.3-3.el5.centos       extras       213 k
heartbeat-stonith       i386       2.1.3-3.el5.centos       extras       311 k

原来是要PyXML这个包，注意大小写

 

接下来继续编译，安装
make又错：

cc1: warnings being treated as errors
xml.c: In function 'write_xml_file':
xml.c:635: warning: unused variable 'in'
xml.c: In function 'get_message_xml':
xml.c:775: error: 'BZ_OK' undeclared (first use in this function)
xml.c:775: error: (Each undeclared identifier is reported only once
xml.c:775: error: for each function it appears in.)
xml.c:796: warning: implicit declaration of function 'BZ2_bzBuffToBuffDecompress'
xml.c:799: error: 'BZ_OUTBUFF_FULL' undeclared (first use in this function)
gmake[3]: *** [xml.lo] 错误 1
gmake[3]: Leaving directory `/root/Heartbeat-STABLE-2-1-STABLE-2.1.4/lib/crm/common'
gmake[2]: *** [all-recursive] 错误 1
gmake[2]: Leaving directory `/root/Heartbeat-STABLE-2-1-STABLE-2.1.4/lib/crm'
gmake[1]: *** [all-recursive] 错误 1
gmake[1]: Leaving directory `/root/Heartbeat-STABLE-2-1-STABLE-2.1.4/lib'
make: *** [all-recursive] 错误 1

这个应该是bz报错，bz是什么？bzip2？

不管了

yum install bzip2-devel

继续

编译完成之后有这个提示：

chown hacluster /var/lib/heartbeat/cores/hacluster
chown: “hacluster”: 无效的用户
gmake[2]: [install-exec-local] 错误 1 (忽略)
chmod 700 /var/lib/heartbeat/cores/hacluster
cd /usr/lib/heartbeat;                          \
        for file in `ls /usr/share/heartbeat`;                  \
        do if [  -d $file ]; then continue; fi; \
                rm -f $file && ln -s /usr/share/heartbeat/$file .;      \
        done
gmake[2]: Nothing to be done for `install-data-am'.
gmake[2]: Leaving directory `/root/Heartbeat-STABLE-2-1-STABLE-2.1.4'
gmake[1]: Leaving directory `/root/Heartbeat-STABLE-2-1-STABLE-2.1.4'

注意用户问题哦。

 

 

[root@linux-ha-a ~]# /etc/rc.d/init.d/heartbeat start
logd is already running
Starting High-Availability services:
[失败]
heartbeat: udpport setting must precede media statementsheartbeat[20883]: 2009/08/13_06:26:00 ERROR: Invalid user id name [hacluster]
heartbeat[20883]: 2009/08/13_06:26:00 ERROR: Bad uid list [hacluster]
heartbeat[20883]: 2009/08/13_06:26:00 ERROR: Invalid apiauth directive [ipfail uid=hacluster]

这个就是结果啦。

解决方法：

useradd hacluster
groupadd haclient

chown hacluster /var/lib/heartbeat/cores/hacluster
chmod 700 /var/lib/heartbeat/cores/hacluster

 

这个报错：

heartbeat: udpport setting must precede media statementsheartbeat[21237]: 2009/08/13_06:39:21 ERROR: Auth Key [1] not found in keyfile [/etc/ha.d/authkeys]
heartbeat[21237]: 2009/08/13_06:39:21 ERROR: Authentication configuration error.
heartbeat[21237]: 2009/08/13_06:39:21 ERROR: Configuration error, heartbeat not started.

这个有点好玩，意思是udpport的设置必须在media设置之前。但是实际上是authkey报错造成的，解决方法就是正确配置authkey。