Configure Virtual and private IP address
Change IP address for enp0s8 as shown in the screenshot:
Change IP address for enp0s9 as shown in the screenshot:
BASH[root@rac1 ~]# ifconfig
enp0s3: flags=4163 mtu 1500
inet 192.168.29.25 netmask 255.255.255.0 broadcast 192.168.29.255
inet6 fe80::47d0:55a9:8a35:da47 prefixlen 64 scopeid 0x20
inet6 2405:201:e005:2105:a643:f37d:e07a:b2e2 prefixlen 64 scopeid 0x0
ether 08:00:27:87:4d:a3 txqueuelen 1000 (Ethernet)
RX packets 114393 bytes 171006011 (163.0 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 26276 bytes 2285734 (2.1 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
enp0s8: flags=4163 mtu 1500
inet 192.168.29.71 netmask 255.255.255.0 broadcast 192.168.29.255
inet6 fe80::c65c:1143:f8c3:2d64 prefixlen 64 scopeid 0x20
ether 08:00:27:5f:b8:06 txqueuelen 1000 (Ethernet)
RX packets 3 bytes 1240 (1.2 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 83 bytes 12387 (12.0 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
enp0s9: flags=4163 mtu 1500
inet 192.168.10.1 netmask 255.255.255.0 broadcast 192.168.10.255
inet6 fe80::a4a1:56e5:6ed:76de prefixlen 64 scopeid 0x20
ether 08:00:27:5f:c5:3a txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 119 bytes 18594 (18.1 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73 mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10
loop txqueuelen 1000 (Local Loopback)
RX packets 64 bytes 5088 (4.9 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 64 bytes 5088 (4.9 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
virbr0: flags=4099 mtu 1500
inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255
ether 52:54:00:a4:99:a4 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@rac1 ~]#
Edit the /etc/hosts file as shown below:
INFO
public (enp0s3 (Auto generated)) - 192.168.29.25
virtual (enp0s8) - 192.168.29.71
virtual (enp0s9) - 192.168.10.1
BASHcat /etc/hosts
# Public
192.168.29.25 rac1.bracecoder rac1
192.168.29.176 rac2.bracecoder rac2
# Private
192.168.10.1 rac1-priv.bracecoder rac1-priv
192.168.10.2 rac2-priv.bracecoder rac2-priv
# Virtual
192.168.29.71 rac1-vip.bracecoder rac1-vip
192.168.29.72 rac2-vip.bracecoder rac2-vip
# SCAN (in production this should be configured in DNS)
192.168.29.91 rac-scan.bracecoder rac-scan
192.168.29.92 rac-scan.bracecoder rac-scan
192.168.29.93 rac-scan.bracecoder rac-scan
Installing dependent packages:
BASH[root@rac1 ~]# yum install -y oracle-database-preinstall-19c
[root@rac1 ~]# yum install gcc*
[root@rac1 ~]# yum install binutils*
[root@rac1 ~]# yum install -y compat-libst*
[root@rac1 ~]# yum install -y oracleasm*
[root@rac1 ~]# cd /tmp
[root@rac1 tmp]# wget https://bracecoder.in/files/packages/oracleasmlib-2.0.17-1.el8.x86_64.rpm
[root@rac1 tmp]# wget https://bracecoder.in/files/packages/oracleasm-support-2.1.12-1.el8.x86_64.rpm
[root@rac1 tmp]# yum localinstall ./oracleasm-support-2.1.12-1.el8.x86_64.rpm ./oracleasmlib-2.0.17-1.el8.x86_64.rpm
[root@rac1 ~]# groupadd asmadmin
[root@rac1 ~]# groupadd asmdba
[root@rac1 ~]# useradd -u 54323 -g oinstall -G asmadmin,asmdba grid
[root@rac1 ~]# passwd oracle
Changing password for user oracle.
New password:
BAD PASSWORD: The password is shorter than 8 characters
Retype new password:
passwd: all authentication tokens updated successfully.
[root@rac1 ~]# passwd grid
Changing password for user grid.
New password:
BAD PASSWORD: The password is shorter than 8 characters
Retype new password:
passwd: all authentication tokens updated successfully.
[root@rac1 ~]# usermod -a -G asmdba oracle
[root@rac1 tmp]# 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
Default group to own the driver interface []: oinstall
Start Oracle ASM library driver on boot (y/n) [n]: y
Scan for Oracle ASM disks on boot (y/n) [y]: y
Writing Oracle ASM library driver configuration: done
[root@rac1 tmp]# oracleasm init
Creating /dev/oracleasm mount point: /dev/oracleasm
Loading module "oracleasm": oracleasm
Configuring "oracleasm" to use device physical block size
Mounting ASMlib driver filesystem: /dev/oracleasm
[root@rac1 tmp]#
[root@rac1 tmp]# oracleasm status
Checking if ASM is loaded: yes
Checking if /dev/oracleasm is mounted: yes
[root@rac1 tmp]#
[root@rac1 ~]# systemctl stop firewalld
[root@rac1 ~]# systemctl disable firewalld
Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@rac1 ~]#
[root@rac2 ~]# systemctl status avahi-daemon
[root@rac2 ~]# systemctl stop avahi-daemon
[root@rac2 ~]# systemctl disable avahi-daemon
[root@rac1 ~]# sestatus
SELinux status: enabled
SELinuxfs mount: /sys/fs/selinux
SELinux root directory: /etc/selinux
Loaded policy name: targeted
Current mode: enforcing
Mode from config file: enforcing
Policy MLS status: enabled
Policy deny_unknown status: allowed
Max kernel policy version: 31
[root@rac1 ~]# vi /etc/sysconfig/selinux
[root@rac1 ~]# vi /etc/sysconfig/selinux
SELINUX=disabled
[root@rac1 ~]# init 6
[root@rac1 ~]# sestatus
SELinux status: disabled
[root@rac1 ~]#
mkdir -p /u01/app/oracle/product/19.0.0/db_1
chown -R oracle:oinstall /u01
chmod -R 775 /u01
mkdir -p /u01/app/grid/19.0.0/gridhome_1
mkdir -p /u01/app/gridbase
chown -R grid:oinstall /u01/app/grid/19.0.0/gridhome_1
chown -R grid:oinstall /u01/app/gridbase
chmod -R 775 /u01
Shut down machine
create 3 disks for ASM
INFO
Disk Size Used for which ASM Disk Group?
DISK1 10 GB OCR
DISK2 15 GB DATA
DISK3 15 GB FRA
Follow steps for create disks:
Create remaining 2 disks as same procedure. Makesure 3 disk are shareable:
Now clone the machine. Follow below screenshots:
Add newly created 3 disks to each machine.
Start rac2 machine and change the Private and virtual IP addresses.INFO
public (enp0s3 (Auto generated)) - 192.168.29.217
virtual (enp0s8) - 192.168.1.72
virtual (enp0s9) - 192.168.10.2
BASH[root@rac1 ~]# ifconfig
enp0s3: flags=4163 mtu 1500
inet 192.168.29.217 netmask 255.255.255.0 broadcast 192.168.29.255
inet6 fe80::47d0:55a9:8a35:da47 prefixlen 64 scopeid 0x20
inet6 2405:201:e005:2105:a643:f37d:e07a:b2e2 prefixlen 64 scopeid 0x0
ether 08:00:27:69:68:45 txqueuelen 1000 (Ethernet)
RX packets 748 bytes 282727 (276.1 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 559 bytes 66231 (64.6 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
enp0s8: flags=4163 mtu 1500
inet 192.168.29.72 netmask 255.255.255.0 broadcast 192.168.29.255
inet6 fe80::c65c:1143:f8c3:2d64 prefixlen 64 scopeid 0x20
ether 08:00:27:06:9d:28 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 108 bytes 15983 (15.6 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
enp0s9: flags=4163 mtu 1500
inet 192.168.10.2 netmask 255.255.255.0 broadcast 192.168.10.255
inet6 fe80::a4a1:56e5:6ed:76de prefixlen 64 scopeid 0x20
ether 08:00:27:4c:66:92 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 105 bytes 15725 (15.3 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73 mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10
loop txqueuelen 1000 (Local Loopback)
RX packets 192 bytes 15264 (14.9 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 192 bytes 15264 (14.9 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
virbr0: flags=4099 mtu 1500
inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255
ether 52:54:00:a4:99:a4 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@rac1 ~]#
BASH[root@rac1 ~]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
# Public
192.168.29.25 rac1.bracecoder rac1
192.168.29.217 rac2.bracecoder rac2
# Private
192.168.10.1 rac1-priv.bracecoder rac1-priv
192.168.10.2 rac2-priv.bracecoder rac2-priv
# Virtual
192.168.29.71 rac1-vip.bracecoder rac1-vip
192.168.29.72 rac2-vip.bracecoder rac2-vip
# SCAN (in production this should be configured in DNS)
192.168.29.91 rac-scan.bracecoder rac-scan
192.168.29.92 rac-scan.bracecoder rac-scan
192.168.29.93 rac-scan.bracecoder rac-scan
[root@rac1 ~]#
[root@rac1 ~]# hostnamectl set-hostname rac2.bracecoder
[root@rac1 ~]# cat /etc/hostname
rac2.bracecoder
[root@rac1 ~]# init 0Start both machine. Mount ASM disks on machine 1 as below steps. It will sync automatically on machine 2
BASH[root@rac1 ~]# ls /dev/sd*
/dev/sda /dev/sda1 /dev/sda2 /dev/sdb /dev/sdc /dev/sdd
[root@rac1 ~]# fdisk /dev/sdb
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x268cd046.
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p):
Using default response p
Partition number (1-4, default 1):
First sector (2048-20971519, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-20971519, default 20971519):
Using default value 20971519
Partition 1 of type Linux and of size 10 GiB is set
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@rac1 ~]# fdisk /dev/sdc
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x89013279.
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p):
Using default response p
Partition number (1-4, default 1):
First sector (2048-31457279, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-31457279, default 31457279):
Using default value 31457279
Partition 1 of type Linux and of size 15 GiB is set
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@rac1 ~]# fdisk /dev/sdd
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x39375d5d.
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p):
Using default response p
Partition number (1-4, default 1):
First sector (2048-31457279, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-31457279, default 31457279):
Using default value 31457279
Partition 1 of type Linux and of size 15 GiB is set
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@rac1 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sdd 8:48 0 15G 0 disk
└─sdd1 8:49 0 15G 0 part
sdb 8:16 0 10G 0 disk
└─sdb1 8:17 0 10G 0 part
sr0 11:0 1 1024M 0 rom
sdc 8:32 0 15G 0 disk
└─sdc1 8:33 0 15G 0 part
sda 8:0 0 100.7G 0 disk
├─sda2 8:2 0 99.7G 0 part
│ ├─ol-swap 252:1 0 3.9G 0 lvm [SWAP]
│ ├─ol-home 252:2 0 45.8G 0 lvm /home
│ └─ol-root 252:0 0 50G 0 lvm /
└─sda1 8:1 0 1G 0 part /boot
[root@rac1 ~]#
[root@rac1 ~]# oracleasm createdisk DISK1 /dev/sdb1
Writing disk header: done
Instantiating disk: done
[root@rac1 ~]# oracleasm createdisk DISK2 /dev/sdc1
Writing disk header: done
Instantiating disk: done
[root@rac1 ~]# oracleasm createdisk DISK3 /dev/sdd1
Writing disk header: done
Instantiating disk: done
[root@rac1 ~]# oracleasm scandisks
Reloading disk partitions: done
Cleaning any stale ASM disks...
Scanning system for ASM disks...
[root@rac1 ~]# oracleasm listdisks
DISK1
DISK2
DISK3
[root@rac1 ~]#
[root@rac2 ~]# oracleasm scandisks
Reloading disk partitions: done
Cleaning any stale ASM disks...
Scanning system for ASM disks...
Instantiating disk "DISK1"
Instantiating disk "DISK2"
Instantiating disk "DISK3"
[root@rac2 ~]# oracleasm listdisks
DISK1
DISK2
DISK3
[root@rac2 ~]#Follow below steps for configure Environment variables on oracle account..
In the .bash_profile file of the oracle account in rac2, change the value assigned to ORACLE_SID from orcl1 to orcl2.
RAC1 and RAC2 both apply
BASH[oracle@rac1 ~]$ mv ~/.bash_profile ~/.bash_profile_bk
[oracle@rac1 ~]$ vi ~/.bash_profile
# .bash_profile
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
ORACLE_SID=orcl1; export ORACLE_SID
ORACLE_BASE=/u01/app/oracle; export ORACLE_BASE
ORACLE_HOME=$ORACLE_BASE/product/19.0.0/db_1; export ORACLE_HOME
ORACLE_TERM=xterm; export ORACLE_TERM NLS_DATE_FORMAT="DD-MON-YYYY HH24:MI:SS"; export NLS_DATE_FORMAT
TNS_ADMIN=$ORACLE_HOME/network/admin; export TNS_ADMIN
PATH=.:${PATH}:$ORACLE_HOME/bin
PATH=${PATH}:/usr/bin:/bin:/usr/local/bin
export PATH
LD_LIBRARY_PATH=$ORACLE_HOME/lib
LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:$ORACLE_HOME/oracm/lib
LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/lib:/usr/lib:/usr/local/lib
export LD_LIBRARY_PATH
THREADS_FLAG=native;
export THREADS_FLAG
export TEMP=/tmp
export TMPDIR=/tmp
export EDITOR=vi
umask 022
# .bash_profile
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
ORACLE_SID=orcl2; export ORACLE_SID
ORACLE_BASE=/u01/app/oracle; export ORACLE_BASE
ORACLE_HOME=$ORACLE_BASE/product/19.0.0/db_1; export ORACLE_HOME
ORACLE_TERM=xterm; export ORACLE_TERM NLS_DATE_FORMAT="DD-MON-YYYY HH24:MI:SS"; export NLS_DATE_FORMAT
TNS_ADMIN=$ORACLE_HOME/network/admin; export TNS_ADMIN
PATH=.:${PATH}:$ORACLE_HOME/bin
PATH=${PATH}:/usr/bin:/bin:/usr/local/bin
export PATH
LD_LIBRARY_PATH=$ORACLE_HOME/lib
LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:$ORACLE_HOME/oracm/lib
LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/lib:/usr/lib:/usr/local/lib
export LD_LIBRARY_PATH
THREADS_FLAG=native;
export THREADS_FLAG
export TEMP=/tmp
export TMPDIR=/tmp
export EDITOR=vi
umask 022
[root@rac2 ~]# sudo su - grid
[grid@rac2 ~]$ mv ~/.bash_profile ~/.bash_profile_bk
[grid@rac2 ~]$ vi ~/.bash_profile
[grid@rac2 ~]$
Follow below steps for configure Environment variables on grid account..
In .bash_profile file of the grid account in rac2, change the value assigned to ORACLE_SID from +ASM1 to +ASM2.
BASH# .bash_profile
# OS User: grid
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
ORACLE_SID=+ASM1; export ORACLE_SID
ORACLE_BASE=/u01/app/gridbase; export ORACLE_BASE
# it must not be under the ORACLE_BASE
ORACLE_HOME=/u01/app/grid/19.0.0/gridhome_1; export ORACLE_HOME
ORACLE_TERM=xterm; export ORACLE_TERM
TNS_ADMIN=$ORACLE_HOME/network/admin; export TNS_ADMIN
PATH=.:${PATH}:$ORACLE_HOME/bin
PATH=${PATH}:/usr/bin:/bin:/usr/local/bin
export PATH
export TEMP=/tmp
export TMPDIR=/tmp
umask 022
# .bash_profile
# OS User: grid
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
ORACLE_SID=+ASM2; export ORACLE_SID
ORACLE_BASE=/u01/app/gridbase; export ORACLE_BASE
# it must not be under the ORACLE_BASE
ORACLE_HOME=/u01/app/grid/19.0.0/gridhome_1; export ORACLE_HOME
ORACLE_TERM=xterm; export ORACLE_TERM
TNS_ADMIN=$ORACLE_HOME/network/admin; export TNS_ADMIN
PATH=.:${PATH}:$ORACLE_HOME/bin
PATH=${PATH}:/usr/bin:/bin:/usr/local/bin
export PATH
export TEMP=/tmp
export TMPDIR=/tmp
umask 022Set limit values for database.
BASH[root@rac1 limits.d]# mv /etc/security/limits.d/oracle-database-preinstall-19c.conf /etc/security/limits.d/oracle-database-preinstall-19c.conf.bak
[root@rac1 limits.d]# ls -lrt
total 4
-rw-r--r--. 1 root root 1205 Jul 27 22:50 oracle-database-preinstall-19c.conf.bak
[root@rac1 limits.d]# vi /etc/security/limits.d/oracle-database-preinstall-19c.conf
[root@rac1 limits.d]#
# oracle-rdbms-server-12cR1-preinstall setting for nofile soft limit is 1024
oracle soft nofile 1024
grid soft nofile 1024
# oracle-rdbms-server-12cR1-preinstall setting for nofile hard limit is 65536
oracle hard nofile 65536
grid hard nofile 65536
# oracle-rdbms-server-12cR1-preinstall setting for nproc soft limit is 16384
# refer orabug15971421 for more info.
oracle soft nproc 16384
grid soft nproc 16384
# oracle-rdbms-server-12cR1-preinstall setting for nproc hard limit is 16384
oracle hard nproc 16384
grid hard nproc 16384
# oracle-rdbms-server-12cR1-preinstall setting for stack soft limit is 10240KB
oracle soft stack 10240
grid soft stack 10240
# oracle-rdbms-server-12cR1-preinstall setting for stack hard limit is 32768KB
oracle hard stack 32768
grid hard stack 32768
# oracle-rdbms-server-11gR2-preinstall setting for memlock hard limit is maximum of {128GB (x86_64) / 3GB (x86) or 90 % of RAM}
oracle hard memlock 134217728
grid hard memlock 134217728
# oracle-rdbms-server-11gR2-preinstall setting for memlock soft limit is maximum of {128GB (x86_64) / 3GB (x86) or 90% of RAM}
oracle soft memlock 134217728
grid soft memlock 134217728In rac1 and rac2, set the number of processes a user can create to 2048
BASHvi /etc/security/limits.d/90-nproc.conf
* soft nproc 2048SSH Passwordless login
BASH[root@rac2 ~]# yum install openssh-server openssh-clients
[root@rac2 ~]# yum makecache
[root@rac2 ~]# yum install bind bind-utils -yopen all users(root,grid,oracle) on both rac1 and rac2. Execute follow commands
BASH[root@rac1 ~]# ssh-keygen -t rsa
Open id_rsa.pub file and copy all users under the id_rsa.pub file output texts and save it as a file name called authorized_keys. Do it for all users under rac1 and rac2.BASH[root@rac1 ~]# cd .ssh/
[root@rac1 .ssh]# ls -lrth
total 8.0K
-rw-r--r-- 1 root root 402 Aug 1 16:33 id_rsa.pub
-rw------- 1 root root 1.7K Aug 1 16:33 id_rsa
[root@rac1 .ssh]#
BASH[grid@rac2 ~]$ cat .ssh/authorized_keys
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCdeEWaoIVrxUEvyr8Rqoi4xpmVbtr5YNSUrORg8Lazp1DncOns9RZyn7Q9HcpY2TydjUe+oz+9vePcSvpU5ksq6AG9DTNMffoOw0SPzuHrcTnNRgPky+diVBGMHx1ua2bPu4g6EPCU6PNTTrcTuwG+lnrRv6WsAmY6kcjCaXpN/6CA2ga5mNRtWy5JPUcArCn6u9ouAdJIVVBYm1tEPJNxH9eFdcqA8BWFuZzhD+DF0ebveOhvVZv7G8/Iab970E873GvVg4NWi/IYbZOhDKHEC5Cf/ZK0NHTY53Et9fTDuWFd0+2AwfWmhvcOWjh/Z0mHOyxZgAHKDe7vOlPHK7aj root@rac1.bracecoder
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC/337gSVIsBqJP5dMwWOo6LIesk1mkU5A1Sy3Xq0cGN0d3nC+wf9MC/iKDi/NZsPaQK8vBFNuBJ1G7jIQTyNgCsYvWoElom55jvJc/6Kew8WD9w/v82+/EK8vilWJwK7ryMngxxaHOQLxbfdYmFsgmh3TdzdVWrMwQB0e2IWkPJYWLgD9Ht632gcAI47RAgRmBkwkHkISWMHx9IC97+PQ1mtFi0f02WgiWb00er9JETrhXdHR8lErUkt1X8iHhcc8XGgC4SHhRLqlgiNNvlum4mRAchhAfFiWdi0Fol7MIDxjPK7RouDYeWuSEMyLrEyi7nFwhbBansCqjpn8fgxcF root@rac2.bracecoder
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDLBtn2+a5zaZt8kdqFYowyPwTIX5G9ez/GLPRxq9gkG/yI1fAeED/sp4fjCmP8kspYmZvlCu1VG6KbSqV2gGG/DCQgeWGWXoreYL42Fg5L8eyNeUVOkEEh/YDvWzha4djuanYFoVfPCwuY8/jrng5njMDnX5NwNHDJpRZZld4N/L7Xz21I1ad5sSuxnMFqEY610FgIimiCeWdIc/TdAdQk2uQgFmwgTU4OaDUv8eyP5WpHWuR5c4no2PfABfJwGG66Komj2TWm3+f5mpUtmV3xEOPIfCtpzZEmbKXG8Tj34sPNXSaibmIjw3qofcz4hs1LVMvBnJXT1ZR3esE1eqgV oracle@rac1.bracecoder
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDarC3M1+HHAou1E+AXNPwcgE0Ok694m0S1QFne3bnnyCAPHP0wwkxKWm2mr2+G+DJ3esWznQo8QaOiXPl+SsqvKELfz+jceVkbyxb6tNrKIirLNcvhxB1mX21y8wXpyljw3tZx6zWk4M7bvrw/su9UvPz25pbm4+c1DmsLzWkz16/UuXoqrvxyMFu8sZJ6vQtLFMPZhbpzklgVAGRPW68CGDkEdjGGBJRXW6WS8z3d6PN1+wYvAUwn1utL3QqmE7SafAoQgY1hmGF1Dvu8jPQKwCM++CAm2FwUlck9I5BGU2x7h8LI77chAtcvS6qZd269BdN14m8IqlAYzvZ2MuF3 oracle@rac2.bracecoder
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC9JoRUK1O2gVn9/yO0V4gRDNwcgk5ReMtQvsM4SKn6LRD77KdWjFOONDqZElJTvyUE5smjHrW+MtL7Tme4I7dJW0wF9DOUSv9hMUWUk86mzTist5qr1Vd8yD9sX8g3JhiyeUpN99YcQYESwhy3Rg5u9bHWq4LxojeXHmxxbIIS8ehIiaXwYwWxRlQtCaFAIM4I8m+vjlvrYDcwqql0d3IY3aCkZzxWXJaj+dIeBZyMT3J1p9Yqa52YppuDNwqLKeQ8jSW3T9mh70Y3H5q/5uW/J9dR3biv7WUjclWZc336REVMODoPjqxZVmeHOOH91rKoajZVEGV3w9IrIkDd2ROb grid@rac1.bracecoder
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDJJ36IIw05i9wCv/RwbvOuJXiVYUBRSmGf2D43R2cLGZ96OyNi/gLLQx27nottSkIP8VSZhb3Nn2hDt9lS/D85gI1WZmNFY2bp/9t7/PoW40b2Um/1RI8iX17rfvwtlrT62nJB27orQ/g7r37L5xNfFeJQjwpu34Eua3h3BR3xsPhJSR7hdJWUuys7lxARiIFV/J73lY9rO2kA4vDVqA62R7TJb0MwhHkJeWOtN1Tu8/xvl9Qa2Vh0LC3ZY+yDfd8yY2/NteY5YqbI4aroAnryB8uUBAufDdlh5HRLdrUtc8cvPKzEHbmY+FnODuRoX790nSyKMxutVrO5G2xi6jmf grid@rac2.bracecoder
try to login using ssh [servername] without asking password. If its prompt password check correctly place text under all users.
BASH[oracle@rac2 ~]$ ssh rac1
Last login: Thu Aug 1 16:47:10 2024 from rac2.bracecoder
[oracle@rac1 ~]$ exit
logout
Connection to rac1 closed.
[oracle@rac2 ~]$ ssh rac2
Last login: Thu Aug 1 16:47:44 2024 from rac2.bracecoder
[oracle@rac2 ~]$ exit
logout
Connection to rac2 closed.
[oracle@rac2 ~]$ ssh rac1.bracecoder
Last login: Thu Aug 1 16:48:03 2024 from rac2.bracecoder
[oracle@rac1 ~]$ exit
logout
Connection to rac1.bracecoder closed.
[oracle@rac2 ~]$ ssh rac2.bracecoder
Last login: Thu Aug 1 16:48:13 2024 from rac2.bracecoder
[oracle@rac2 ~]$ exit
logout
Connection to rac2.bracecoder closed.
[oracle@rac2 ~]$
[oracle@rac2 ~]$ ping rac1
PING rac1.bracecoder (192.168.29.25) 56(84) bytes of data.
64 bytes from rac1.bracecoder (192.168.29.25): icmp_seq=1 ttl=64 time=0.384 ms
64 bytes from rac1.bracecoder (192.168.29.25): icmp_seq=2 ttl=64 time=0.311 ms
64 bytes from rac1.bracecoder (192.168.29.25): icmp_seq=3 ttl=64 time=0.347 ms
^C
--- rac1.bracecoder ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2006ms
rtt min/avg/max/mdev = 0.311/0.347/0.384/0.033 ms
[oracle@rac2 ~]$ ping rac2
PING rac2.bracecoder (192.168.29.217) 56(84) bytes of data.
64 bytes from rac2.bracecoder (192.168.29.217): icmp_seq=1 ttl=64 time=0.047 ms
64 bytes from rac2.bracecoder (192.168.29.217): icmp_seq=2 ttl=64 time=0.056 ms
64 bytes from rac2.bracecoder (192.168.29.217): icmp_seq=3 ttl=64 time=0.016 ms
^C
--- rac2.bracecoder ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2054ms
rtt min/avg/max/mdev = 0.016/0.039/0.056/0.018 ms
[oracle@rac2 ~]$ ping rac1.bracecoder
PING rac1.bracecoder (192.168.29.25) 56(84) bytes of data.
64 bytes from rac1.bracecoder (192.168.29.25): icmp_seq=1 ttl=64 time=0.467 ms
64 bytes from rac1.bracecoder (192.168.29.25): icmp_seq=2 ttl=64 time=0.574 ms
64 bytes from rac1.bracecoder (192.168.29.25): icmp_seq=3 ttl=64 time=0.387 ms
^C
--- rac1.bracecoder ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2059ms
rtt min/avg/max/mdev = 0.387/0.476/0.574/0.076 ms
[oracle@rac2 ~]$ ping rac2.bracecoder
PING rac2.bracecoder (192.168.29.217) 56(84) bytes of data.
64 bytes from rac2.bracecoder (192.168.29.217): icmp_seq=1 ttl=64 time=0.067 ms
64 bytes from rac2.bracecoder (192.168.29.217): icmp_seq=2 ttl=64 time=0.054 ms
64 bytes from rac2.bracecoder (192.168.29.217): icmp_seq=3 ttl=64 time=0.213 ms
^C
--- rac2.bracecoder ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2060ms
rtt min/avg/max/mdev = 0.054/0.111/0.213/0.072 ms
[oracle@rac2 ~]$ ping rac1-priv.bracecoder
PING rac1-priv.bracecoder (192.168.10.1) 56(84) bytes of data.
64 bytes from rac1-priv.bracecoder (192.168.10.1): icmp_seq=1 ttl=64 time=0.462 ms
64 bytes from rac1-priv.bracecoder (192.168.10.1): icmp_seq=2 ttl=64 time=0.345 ms
64 bytes from rac1-priv.bracecoder (192.168.10.1): icmp_seq=3 ttl=64 time=0.519 ms
^C
--- rac1-priv.bracecoder ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2050ms
rtt min/avg/max/mdev = 0.345/0.442/0.519/0.072 ms
[oracle@rac2 ~]$ ping rac2-priv.bracecoder
PING rac2-priv.bracecoder (192.168.10.2) 56(84) bytes of data.
64 bytes from rac2-priv.bracecoder (192.168.10.2): icmp_seq=1 ttl=64 time=0.047 ms
64 bytes from rac2-priv.bracecoder (192.168.10.2): icmp_seq=2 ttl=64 time=0.117 ms
64 bytes from rac2-priv.bracecoder (192.168.10.2): icmp_seq=3 ttl=64 time=0.018 ms
^C
--- rac2-priv.bracecoder ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2014ms
rtt min/avg/max/mdev = 0.018/0.060/0.117/0.042 ms
[oracle@rac2 ~]$ ping rac1-vip.bracecoder
PING rac1-vip.bracecoder (192.168.29.71) 56(84) bytes of data.
64 bytes from rac1-vip.bracecoder (192.168.29.71): icmp_seq=1 ttl=64 time=0.442 ms
64 bytes from rac1-vip.bracecoder (192.168.29.71): icmp_seq=2 ttl=64 time=0.668 ms
64 bytes from rac1-vip.bracecoder (192.168.29.71): icmp_seq=3 ttl=64 time=0.947 ms
^C
--- rac1-vip.bracecoder ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2005ms
rtt min/avg/max/mdev = 0.442/0.685/0.947/0.208 ms
[oracle@rac2 ~]$ ping rac2-vip.bracecoder
PING rac2-vip.bracecoder (192.168.29.72) 56(84) bytes of data.
64 bytes from rac2-vip.bracecoder (192.168.29.72): icmp_seq=1 ttl=64 time=0.048 ms
64 bytes from rac2-vip.bracecoder (192.168.29.72): icmp_seq=2 ttl=64 time=0.059 ms
64 bytes from rac2-vip.bracecoder (192.168.29.72): icmp_seq=3 ttl=64 time=0.012 ms
^C
--- rac2-vip.bracecoder ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2033ms
rtt min/avg/max/mdev = 0.012/0.039/0.059/0.021 ms
[oracle@rac2 ~]$Config nslookup
BASHsystemctl stop named
systemctl disable named
export DNS_IP="192.168.29.25"
export DNS_DOMAIN="bracecoder"
export DNS_NETWORK="192.168.29.0/24"
export DNS_BACKWARD="29.168.192.in-addr.arpa"
export DNS_FORWARD=$DNS_DOMAIN
export DNS_BACKWARD_FILE="backward.$DNS_DOMAIN"
export DNS_FORWARD_FILE="forward.$DNS_DOMAIN"
export DNS_HOSTNAME="rac1"
export DNS_FQDN=$DNS_HOSTNAME.$DNS_DOMAIN
export DNS_IP="192.168.29.217"
export DNS_DOMAIN="bracecoder"
export DNS_NETWORK="192.168.29.0/24"
export DNS_BACKWARD="29.168.192.in-addr.arpa"
export DNS_FORWARD=$DNS_DOMAIN
export DNS_BACKWARD_FILE="backward.$DNS_DOMAIN"
export DNS_FORWARD_FILE="forward.$DNS_DOMAIN"
export DNS_HOSTNAME="rac2"
export DNS_FQDN=$DNS_HOSTNAME.$DNS_DOMAIN
rac1 and rac2:
BASH
cat > /etc/named.conf <rac1:
BASHcat > /var/named/forward.bracecoder <rac2:
BASHcat > /var/named/forward.bracecoder <
rac1:
BASHcat > /var/named/backward.bracecoder <
rac2:
BASH
cat > /var/named/backward.bracecoder <
BASH# change the owner
chown named:named /var/named/forward.bracecoder
chown named:named /var/named/backward.bracecoder
named-checkzone bracecoder /var/named/forward.bracecoder
rac2> named-checkzone 192.168.29.217 /var/named/backward.bracecoder
rac1> named-checkzone 192.168.29.25 /var/named/backward.bracecoder
systemctl start named
systemctl enable named
rac1:
BASH[root@rac1 ~]# cat /etc/resolv.conf
# Generated by NetworkManager
search bracecoder
nameserver 192.168.29.25
domain rac1.bracecoder
nameserver 2405:201:e005:2105::c0a8:1d01
[root@rac1 ~]#rac2:
BASH[root@rac2 ~]# cat /etc/resolv.conf
# Generated by NetworkManager
search bracecoder
nameserver 192.168.29.217
domain rac2.bracecoder
nameserver 2405:201:e005:2105::c0a8:1d01
[root@rac2 ~]#rac1:
BASH
[root@rac1 ~]# cat /etc/resolv.conf
# Generated by NetworkManager
search bracecoder
nameserver 192.168.29.25
domain rac1.bracecoder
nameserver 2405:201:e005:2105::c0a8:1d01
[root@rac1 ~]#
rac2:
BASH
[root@rac2 ~]# cat /etc/resolv.conf
# Generated by NetworkManager
search bracecoder
nameserver 192.168.29.217
domain rac2.bracecoder
nameserver 2405:201:e005:2105::c0a8:1d01
[root@rac2 ~]#BASH$ sudo systemctl restart chronyd.service
$ systemctl is-active chronyd.service
active
$ chronyc sources
[root@rac4 gridhome_1]#
$ sudo yum install chrony
$ sudo timedatectl set-ntp true
That’s it.INFO
If you would have any questions or concerns, please leave your comments. I would be glad to explain in more details. Thank you so much for all your feedback and support!
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