环境说明:
1. 硬件:
说明:按照标准至少需要4块网卡和其他相应硬件,但因为条件限制,故在硬件和设置上做了一些变通。
服务器:PE4300、PE4600
网卡:两个
RAID:两块PERC2/SC
Storage:PV220S和SCSI cable
2. 软件:
OS:RedHat Advance Server 2.1
Kernel: 2.4.9-e.3smp
配制分配:
IP: node1: 10.0.0.1/8
node2: 10.0.0.2/8
Cluster IP: 10.0.0.3 这个地址不同于Microsoft下的Cluster server IP address,该地址是用于管理上用的。
基本步骤:
一、安装OS
说明:为了安装可以顺利进行,建议先移掉RAID卡,否则在拷贝完文件后系统不能正常启动。因为,当使用插卡(RAID/SCSI)连接外置磁盘柜,它们将总是优先于本地硬盘被检测,这个将导致本地的盘符被改变。
按照通常的步骤安装OS,在系统安装完后,将RAID或SCSI卡插回主机,在下次重启时系统将自动发现新设备。但为了保证在每次系统引导时该设备能自动启动,你仍需做以下两步:
a. 编辑 /etc/modules.conf文件,同时增加下面内容到文件内容中
alias scsi_hostadapter megaraid
options scsi_mod max_scsi_luns=255 à可提前增加这一行,因为有共享磁盘柜存
在,并且有多个LUN在上面时,系统要求这样做。
b. 执行
Mkinitrd initrd-2.4.9-e.3smp.img 2.4.9-e.3smp à这行的内容主要还是由内核来决定。
例:
/etc/modules.conf:
alias scsi_hostadapter megaraid
options scsi_mod max_scsi_luns=255
二、物理连接
这部份的步骤与W2K一样,即先用一个节点配制LUN,另一个节点从磁盘读LUN配制,同时保证2块RAID卡的Cluster功能开启,SCSI ID 不能冲突,同时将PV220S的开关拨动到Cluster模式。
三、安装和配制分区
1.建立分驱
说明:建议在此时只开一个节点。在系统启动后,系统可以识别在磁盘柜上新建的LUN。设备名通常是在本地硬盘后顺序编排。例如:当本地是/dev/sda,那么新的设备是/dev/sdb
分区的原则和要求:Quorum分区的要求:不能小于10M,必须是裸设备,不能有文件系统。
Quorum分区只能用于Cluster的状态和配制信息。
Quorum要求两个分区,一个为primary,另一个为slave
Cluster 应用服务的分区:要求一个cluster服务一个分区。例如:你想有SQL、NFS、SAMBA三个Cluster应用服务,那么你必须为三个服务各建一个分区。
例:fdisk /dev/sdb 创建新的分区
/dev/sdb1 àQuorum primary partition
/dev/sdb2 àQuorum slave partition
/dev/sdb3 àSql partition
/dev/sdb4 àNFS partition
/dev/sdb5 àsamba partition
注意:在创建完分驱后,一定要重启主机,建议重启所有设备。
2.建立文件系统??即格式化分区
说明:Quorum 必须是裸设备,所以不需要格式化。但其他分区必须格式化,同时将默认的Block块大小增大到4096,默认为1024。
例:
mkfs ?t ext2 ?j ?b 4096 /dev/sdbx ?-》X代表分区
3.为Cluster 创建Quorum分区
说明:使用命令 cat /proc/devices 确认系统是否支持裸设备,如果你看到下面的输出,说明系统可以支持裸设备。
162 raw
在两台服务器上分别编辑/etc/sysconfig/rawdevices文件,以便将分区绑定到裸设备。
例: /etc/sysconfig/rawdevices
# format:
#
# example: /dev/raw/raw1 /dev/sda1
# /dev/raw/raw2 8 5
/dev/raw/raw1 /dev/sdb1
/dev/raw/raw2 /dev/sdb2
重启服务 service rawdevices restart
4.检查和验证Quoram分区
在两个节点上分别cludiskutil ?p 确保两个节点都能有以下输出:
----- Shared State Header ------
Magic# = 0x39119fcd
Version = 1
Updated on Thu Sep 14 05:43:18 2000
Updated by node 0
四、建立Cluster服务
说明:确保所有网卡正常工作。同时,设置基本的网络要求。
1.编辑/etc/hosts 文件
127.0.0.1 localhost.localdomain localhost
10.0.0.1 node1.test.com node1
10.0.0.2 node2.test.com node2
10.0.0.3 Clusteralias.test.com Clusteralias
2.运行/sbin/cluconfig
说明:系统将自动生成cluster的配制文件/etc/cluster.conf,这一步只需要在其中一个节点上运行。
你将看到以下输出:
Enter cluster name [Cluster]:Cluster
Enter IP address for cluster alias [x.x.x.x]: 10.0.0.3
--------------------------------
Information for Cluster Member 0
--------------------------------
Enter name of cluster member [storage0]: node1
Looking for host storage0 (may take a few seconds)...
Enter number of heartbeat channels (minimum = 1) [1]: 1
Information about Channel 0
Channel type: net or serial [net]:
Enter hostname of the cluster member on heartbeat channel 0 [node1]: node1
Looking for host node1 (may take a few seconds)...
Information about Quorum Partitions
Enter Primary Quorum Partition [/dev/raw/raw1]: /dev/raw/raw1
Enter Shadow Quorum Partition [/dev/raw/raw2]: /dev/raw/raw2
Information About the Power Switch That Power Cycles Member ’storage0’
Choose one of the following power switches:
o NONE
o RPS10
o BAYTECH
o APCSERIAL
o APCMASTER
o WTI_NPS
Power switch [NONE]: NONE
Information for Cluster Member 1
--------------------------------
Enter name of cluster member [node2]: node2
Looking for host storage1 (may take a few seconds)...
Information about Channel 0
Enter hostname of the cluster member on heartbeat channel 0 [node2]: node2
Looking for host storage1 (may take a few seconds)...
Information about Quorum Partitions
Enter Primary Quorum Partition [/dev/raw/raw1]: /dev/raw/raw1
Enter Shadow Quorum Partition [/dev/raw/raw2]: /dev/raw/raw2
Information About the Power Switch That Power Cycles Member ’node2’
Choose one of the following power switches:
o NONE
o RPS10
o BAYTECH
o APCSERIAL
o APCMASTER
o WTI_NPS
Power switch [NONE]: NONE
Cluster name: Development Cluster
Cluster alias IP address: 10.0.0.154
Cluster alias netmask: 255.255.254.0
--------------------
Member 0 Information
--------------------
Name: node1
Primary quorum partition: /dev/raw/raw1
Shadow quorum partition: /dev/raw/raw2
Heartbeat channels: 1
Channel type: net, Name: node1
Power switch IP address or hostname: node1
--------------------
Member 1 Information
--------------------
Name: node2
Primary quorum partition: /dev/raw/raw1
Shadow quorum partition: /dev/raw/raw2
Heartbeat channels: 1
Channel type: net, Name: node2
Save the cluster member information? yes/no [yes]:
Writing to configuration file...done
Configuration information has been saved to /etc/cluster.conf.
----------------------------
Setting up Quorum Partitions
----------------------------
Running cludiskutil -I to initialize the quorum partitions: done
Saving configuration information to quorum partitions: done
Do you wish to allow remote monitoring of the cluster? yes/no [yes]: yes
----------------------------------------------------------------
Configuration on this member is complete.
To configure the next member, invoke the following command on that system:
# /sbin/cluconfig --init=/dev/raw/raw1
See the manual to complete the cluster installation
3.配制第二个节点
只需执行 cluconfig --init=/dev/raw/raw1
4.启动Cluster服务
分别在两个节点上执行 service cluster start
你将看到下面的几个Daemon
• cluquorumd ― Quorum daemon