11g RAC INSTALL 准备工作part2

共享磁盘：

另加一个虚机，为这三台主机提供服务

10.100.21.222Disk /dev/sdb: 96.6 GB, 96636764160 bytes255 heads, 63 sectors/track, 11748 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00000000

其中15G预分配给 OCR 资源 剩余 预分配给+DATA

FDISK这样分区：

   Device Boot      Start         End      Blocks   Id  System/dev/sdb1               1         654     5253223+  83  Linux/dev/sdb2             655        1308     5253255   83  Linux/dev/sdb3            1309        1962     5253255   83  Linux/dev/sdb4            1963       11748    78606045    5  Extended/dev/sdb5            1963        4574    20980858+  83  Linux/dev/sdb6            4575        7186    20980858+  83  Linux/dev/sdb7            7187       11748    36644233+  83  Linux

reboot os 使其配置生效

[root@racdata ~]# partprobeWarning: WARNING: the kernel failed to re-read the partition table on /dev/sda (Device or resource busy).  As a result, it may not reflect all of your changes until after reboot.[root@racdata ~]# reboot 

ISCSI 配置(因为这里没有存储,所以用ISCSI来设置)

racdata 机器安装,rac节点也安装下

[root@racdata ~]#  rpm -aq|grep scsilsscsi-0.23-3.el6.x86_64scsi-target-utils-1.0.24-16.0.2.el6.x86_64iscsi-initiator-utils-6.2.0.873-14.0.1.el6.x86_64

[root@racdb01 ~]# cat /etc/tgt/targets.conf <target iqn.2017-09.racdata:asm>backing-store /dev/sdb1            backing-store /dev/sdb2            backing-store /dev/sdb3                      backing-store /dev/sdb5            backing-store /dev/sdb6            backing-store /dev/sdb7 initiator-address 10.100.21.0/24write-cache off      </target>

配置的命名规则：
iqn = iSCSI Qualified Name

iSCSI target的名称规则如下：

iqn.2014-07.dev.iscsi-target:iscsidisk

iqn.年份-月份.域名反写.设备识别

每个在同一个target上的backing-store 称为逻辑单元号（Logical Unit Number，LUN），这个实验中有6个LUN。

[root@racdata ~]# vim /etc/tgt/targets.conf [root@racdata ~]# /etc/init.d/tgtd  start Starting SCSI target daemon:                               [  OK  ][root@racdata ~]# netstat -anlp|grep tgttcp        0      0 0.0.0.0:3260                0.0.0.0:*                   LISTEN      9597/tgtd           tcp        0      0 :::3260                     :::*                        LISTEN      9597/tgtd           unix  2      [ ACC ]     STREAM     LISTENING     21166  9597/tgtd           /var/run/tgtd.ipc_abstract_namespace.0unix  2      [ ]         DGRAM                    25893  9597/tgtd   [root@racdata ~]# tgt-admin --showTarget 1: iqn.2017-09.racdata:asm    System information:        Driver: iscsi        State: ready    I_T nexus information:    LUN information:        LUN: 0            Type: controller            SCSI ID: IET     00010000            SCSI SN: beaf10            Size: 0 MB, Block size: 1            Online: Yes            Removable media: No            Prevent removal: No            Readonly: No            Backing store type: null            Backing store path: None            Backing store flags:         LUN: 1            Type: disk            SCSI ID: IET     00010001            SCSI SN: beaf11            Size: 5379 MB, Block size: 512            Online: Yes            Removable media: No            Prevent removal: No            Readonly: No            Backing store type: rdwr            Backing store path: /dev/sdb1            Backing store flags:         LUN: 2            Type: disk            SCSI ID: IET     00010002            SCSI SN: beaf12            Size: 5379 MB, Block size: 512            Online: Yes            Removable media: No            Prevent removal: No            Readonly: No            Backing store type: rdwr            Backing store path: /dev/sdb2            Backing store flags:         LUN: 3            Type: disk            SCSI ID: IET     00010003            SCSI SN: beaf13            Size: 5379 MB, Block size: 512            Online: Yes            Removable media: No            Prevent removal: No            Readonly: No            Backing store type: rdwr            Backing store path: /dev/sdb3            Backing store flags:         LUN: 4            Type: disk            SCSI ID: IET     00010004            SCSI SN: beaf14            Size: 21484 MB, Block size: 512            Online: Yes            Removable media: No            Prevent removal: No            Readonly: No            Backing store type: rdwr            Backing store path: /dev/sdb5            Backing store flags:         LUN: 5            Type: disk            SCSI ID: IET     00010005            SCSI SN: beaf15            Size: 21484 MB, Block size: 512            Online: Yes            Removable media: No            Prevent removal: No            Readonly: No            Backing store type: rdwr            Backing store path: /dev/sdb6            Backing store flags:         LUN: 6            Type: disk            SCSI ID: IET     00010006            SCSI SN: beaf16            Size: 37524 MB, Block size: 512            Online: Yes            Removable media: No            Prevent removal: No            Readonly: No            Backing store type: rdwr            Backing store path: /dev/sdb7            Backing store flags:     Account information:    ACL information:        10.100.21.0/24[root@racdata ~]# 

客户端执行

chkconfig iscsid on;chkconfig iscsi on;iscsiadm -m discovery -t sendtargets -p 10.100.21.222

输出结果

[root@racdb01 ~]# iscsiadm -m discovery -t sendtargets -p 10.100.21.22210.100.21.222:3260,1 iqn.2017-09.racdata:asm

重启所有rac节点服务器：

[root@racdb03 ~]# fdisk -l[root@racdb01 ~]# fdisk -l|grep sdDisk /dev/sda: 536.9 GB, 536870912000 bytes/dev/sda1               1        4178    33554432   82  Linux swap / Solaris/dev/sda2   *        4178       65271   490732544   83  LinuxDisk /dev/sdb: 5379 MB, 5379300864 bytesDisk /dev/sdc: 5379 MB, 5379333120 bytesDisk /dev/sdd: 5379 MB, 5379333120 bytesDisk /dev/sde: 21.5 GB, 21484399104 bytesDisk /dev/sdf: 21.5 GB, 21484399104 bytesDisk /dev/sdg: 37.5 GB, 37523695104 bytes

你会发现磁盘都映射过来的。

在其中某一个rac节点，给映射过来的磁盘都格式化一下: 你会发现

[root@racdb01 ~]# fdisk -l|grep sdDisk /dev/sda: 536.9 GB, 536870912000 bytes/dev/sda1               1        4178    33554432   82  Linux swap / Solaris/dev/sda2   *        4178       65271   490732544   83  LinuxDisk /dev/sdb: 5379 MB, 5379300864 bytes/dev/sdb1               1        1020     5248889   83  LinuxDisk /dev/sdc: 5379 MB, 5379333120 bytes/dev/sdc1               1        1020     5248889   83  LinuxDisk /dev/sdd: 5379 MB, 5379333120 bytes/dev/sdd1               1        1020     5248889   83  LinuxDisk /dev/sde: 21.5 GB, 21484399104 bytes/dev/sde1               1       20489    20980720   83  LinuxDisk /dev/sdf: 21.5 GB, 21484399104 bytes/dev/sdf1               1       20489    20980720   83  LinuxDisk /dev/sdg: 37.5 GB, 37523695104 bytes/dev/sdg1               1       35785    36643824   83  Linux

在其中某一个节点创建asm磁盘

[root@racdb01 ~]# which oracleasm/usr/sbin/oracleasm

每个节点都执行

[root@racdb01 ~]# /etc/init.d/oracleasm configureConfiguring the Oracle ASM library driver.This will configure the on-boot properties of the Oracle ASM librarydriver.  The following questions will determine whether the driver isloaded on boot and what permissions it will have.  The current valueswill be shown in brackets ('[]').  Hitting <ENTER> without typing ananswer will keep that current value.  Ctrl-C will abort.Default user to own the driver interface []: gridDefault group to own the driver interface []: oinstallStart Oracle ASM library driver on boot (y/n) [n]: yScan for Oracle ASM disks on boot (y/n) [y]: yWriting Oracle ASM library driver configuration: doneInitializing the Oracle ASMLib driver:                     [  OK  ]Scanning the system for Oracle ASMLib disks:               [  OK  ][root@racdb01 ~]# oracleasm createdisk ocr01 /dev/sdb1Writing disk header: doneInstantiating disk: done[root@racdb01 ~]# oracleasm createdisk ocr02 /dev/sdc1Writing disk header: doneInstantiating disk: done[root@racdb01 ~]# oracleasm createdisk ocr03 /dev/sdd1Writing disk header: doneInstantiating disk: done[root@racdb01 ~]# oracleasm createdisk data01 /dev/sde1Writing disk header: doneInstantiating disk: done[root@racdb01 ~]# oracleasm createdisk data02 /dev/sdf1Writing disk header: doneInstantiating disk: done[root@racdb01 ~]# oracleasm createdisk data03 /dev/sdg1Writing disk header: doneInstantiating disk: done

其他节点：

[root@racdb02 ~]# oracleasm scandisksReloading disk partitions: doneCleaning any stale ASM disks...Scanning system for ASM disks...Instantiating disk "OCR01"Instantiating disk "OCR02"Instantiating disk "OCR03"Instantiating disk "DATA01"Instantiating disk "DATA02"Instantiating disk "DATA03"root@racdb02 ~]# cat /etc/sysconfig/oracleasm## This is a configuration file for automatic loading of the Oracle# Automatic Storage Management library kernel driver.  It is generated# By running /etc/init.d/oracleasm configure.  Please use that method# to modify this file## ORACLEASM_ENABLED: 'true' means to load the driver on boot.ORACLEASM_ENABLED=true# ORACLEASM_UID: Default user owning the /dev/oracleasm mount point.ORACLEASM_UID=grid# ORACLEASM_GID: Default group owning the /dev/oracleasm mount point.ORACLEASM_GID=oinstall# ORACLEASM_SCANBOOT: 'true' means scan for ASM disks on boot.ORACLEASM_SCANBOOT=true# ORACLEASM_SCANORDER: Matching patterns to order disk scanningORACLEASM_SCANORDER="sd"# ORACLEASM_SCANEXCLUDE: Matching patterns to exclude disks from scanORACLEASM_SCANEXCLUDE="sda"# ORACLEASM_USE_LOGICAL_BLOCK_SIZE: 'true' means use the logical block size# reported by the underlying disk instead of the physical. The default# is 'false'ORACLEASM_USE_LOGICAL_BLOCK_SIZE=false

这里我们没有DNS服务器，和所谓的时间服务器

总结： rac的安装和部署其实不是多难的事情，主要是前期的配置比较复杂，不过只要勇于尝试，认证总结，总是能搞透的。

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