This articles lists a steps to check before installing Oracle Grid Infrastructure 12cR1 for RAC.
List Of prerequisites to check:
- Check the package: oracle-rdbms-server-12cR1-preinstall
- Kernel Parameters /etc/sysctl.conf
- Security limits /etc/security/limits.conf
- create Groups and user Oracle
# yum install oracle-rdbms-server-12cR1-preinstall-1.0-17.el6.x86_64
- Check User GRID owner of the grid Home
# id grid
uid=54322(grid) gid=54321(oinstall) groups=54321(oinstall),54323(asmdba),54324(asmoper),54325(asmadmin)
- Check User ORACLE owner of the Oracle Home
# id oracle
uid=54321(oracle) gid=54321(oinstall) groups=54321(oinstall),54322(dba),54323(asmdba),54326(oper)
- Check Disks:
- For the diskgroup DATA: We have 10 partitions of 10G
- or the diskgroup FRA: We have 4 partitions of 10G
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 120G 0 disk
├─sda1 8:1 0 500M 0 part /boot
└─sda2 8:2 0 119.5G 0 part
├─vg_oranux-lv_root (dm-0) 249:0 0 109.8G 0 lvm /
└─vg_oranux-lv_swap (dm-1) 249:1 0 9.8G 0 lvm [SWAP]
sdb 8:16 0 10G 0 disk
└─sdb1 8:17 0 10G 0 part
sdc 8:32 0 10G 0 disk
└─sdc1 8:33 0 10G 0 part
sdd 8:48 0 10G 0 disk
└─sdd1 8:49 0 10G 0 part
sde 8:64 0 10G 0 disk
└─sde1 8:65 0 10G 0 part
sdf 8:80 0 10G 0 disk
└─sdf1 8:81 0 10G 0 part
sdg 8:96 0 10G 0 disk
└─sdg1 8:97 0 10G 0 part
sdh 8:112 0 10G 0 disk
└─sdh1 8:113 0 10G 0 part
sdi 8:128 0 10G 0 disk
└─sdi1 8:129 0 10G 0 part
sdj 8:144 0 10G 0 disk
└─sdj1 8:145 0 10G 0 part
sdk 8:160 0 10G 0 disk
└─sdk1 8:161 0 10G 0 part
sdl 8:176 0 10G 0 disk
└─sdl1 8:177 0 10G 0 part
sdm 8:192 0 10G 0 disk
└─sdm1 8:193 0 10G 0 part
sdn 8:208 0 10G 0 disk
└─sdn1 8:209 0 10G 0 part
sdo 8:224 0 10G 0 disk
└─sdo1 8:225 0 10G 0 part
- Configure disks Owner
# oracleasm configure -i
Configuring the Oracle ASM library driver.
This will configure the on-boot properties of the Oracle ASM library
driver. The following questions will determine whether the driver is
loaded on boot and what permissions it will have. The current values
will be shown in brackets ('[]'). Hitting without typing an
answer will keep that current value. Ctrl-C will abort.
Default user to own the driver interface [grid]: grid
Default group to own the driver interface [asmadmin]: asmadmin
Start Oracle ASM library driver on boot (y/n) [y]: y
Scan for Oracle ASM disks on boot (y/n) [y]: y
Writing Oracle ASM library driver configuration: done
# oracleasm configure
ORACLEASM_ENABLED=true
ORACLEASM_UID=grid
ORACLEASM_GID=asmadmin
ORACLEASM_SCANBOOT=true
ORACLEASM_SCANORDER=""
ORACLEASM_SCANEXCLUDE=""
ORACLEASM_SCAN_DIRECTORIES=""
ORACLEASM_USE_LOGICAL_BLOCK_SIZE="false"
- Create an ASM disk:
# oracleasm createdisk DATA01 /dev/sdb1
# oracleasm createdisk DATA02 /dev/sdc1
.......
- List all ASM disks
# oracleasm listdisks
DATA01
DATA02
DATA03
DATA04
DATA05
DATA06
DATA07
DATA08
DATA09
DATA10
FRA01
FRA02
FRA03
FRA04
# ll /dev/oracleasm/disks/
total 0
brw-rw---- 1 grid asmadmin 8, 17 May 30 00:24 DATA01
brw-rw---- 1 grid asmadmin 8, 49 May 30 00:24 DATA02
brw-rw---- 1 grid asmadmin 8, 81 May 30 00:24 DATA03
brw-rw---- 1 grid asmadmin 8, 113 May 30 00:24 DATA04
brw-rw---- 1 grid asmadmin 8, 145 May 30 00:24 DATA05
brw-rw---- 1 grid asmadmin 8, 161 May 30 00:24 DATA06
brw-rw---- 1 grid asmadmin 8, 177 May 30 00:24 DATA07
brw-rw---- 1 grid asmadmin 8, 193 May 30 00:24 DATA08
brw-rw---- 1 grid asmadmin 8, 209 May 30 00:24 DATA09
brw-rw---- 1 grid asmadmin 8, 225 May 30 00:24 DATA10
brw-rw---- 1 grid asmadmin 8, 33 May 30 00:24 FRA01
brw-rw---- 1 grid asmadmin 8, 65 May 30 00:24 FRA02
brw-rw---- 1 grid asmadmin 8, 97 May 30 00:24 FRA03
brw-rw---- 1 grid asmadmin 8, 129 May 30 00:24 FRA04
[root@host01 ~]#
- Check the DNS Resolution: Check Below article how to set up DNS
$ nslookup host02
Server: 192.0.2.53
Address: 192.0.2.53#53
Name: host02.oranux.com.tn
Address: 192.0.2.2
$ nslookup host03
Server: 192.0.2.53
Address: 192.0.2.53#53
Name: host03.oranux.com.tn
Address: 192.0.2.3
$ nslookup host01
Server: 192.0.2.53
Address: 192.0.2.53#53
Name: host01.oranux.com.tn
Address: 192.0.2.1
$ nslookup host01-vip
Server: 192.0.2.53
Address: 192.0.2.53#53
Name: host01-vip.oranux.com.tn
Address: 192.0.2.104
$ nslookup host02-vip
Server: 192.0.2.53
Address: 192.0.2.53#53
Name: host02-vip.oranux.com.tn
Address: 192.0.2.105
$ nslookup host03-vip
Server: 192.0.2.53
Address: 192.0.2.53#53
Name: host03-vip.oranux.com.tn
Address: 192.0.2.106
$ nslookup cluster01-scan
Server: 192.0.2.53
Address: 192.0.2.53#53
Name: cluster01-scan.oranux.com.tn
Address: 192.0.2.102
Name: cluster01-scan.oranux.com.tn
Address: 192.0.2.103
Name: cluster01-scan.oranux.com.tn
Address: 192.0.2.101
- Create Grid Home and Oracle Home
# mkdir -p /u01/app/12.1.0/grid/
# chown -R grid:oinstall /u01/app/
# mkdir -p /u01/app/oracle/product/12.1.0/dbhome_1/
# chown -R oracle:oinstall /u01/app/oracle/
Conclusion
These is the list of system Linux prerequisites lists.
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