Today we will see how we can install 12c Release 1 RAC (Real Application Clusters) database on 2 Linux 64 bit Virtual Machines using VMWare or Oracle VirtualBox. The “c” in Oracle 12c stands for “Cloud“
There are a few important and interesting changes when it comes to installing 12c as compared to 11g RAC. Oracle seems to have added a lot of new interesting features in 12c.
Please note that we will need 2 Virtual Machines each with 3 GB of RAM. So if you have sufficient memory on your laptop/PC or server then you can host both VMs in same box or you can use 2 boxes which are connected to each other via local network.
Hardware requirements:
Processor with dual core or more
3 GB dedicated RAM for each VM
25 GB space for each VM
Since we are not using shared storage for Virtual Machines, we are sharing disks via NFS from one node to another. Here is how the VMs can be represented. Please note that this is not recommended for production setup, this is just for demo installation on Virtual Machines for learning purpose. For production we must use external storage on SAN or NAS storage.
We could also use shared disk technology of VirtualBox but since we want to keep the VMs independent of Virtualization technology, we are using NFS only.
Note: We also have plug and play type ready to use Virtual Machines also for those who want to learn or explore Oracle RAC without hassles of installing and configuring. Use the link on the top of this page to get these VMs if you want to skip the installation steps and directly start learning/exploring Oracle RAC technology.
For all others you can follow this guide to setup the VMs on your own. Please feel free to contact me if you face any issues using the installation guide. Also feel free to help fellow users by sharing the knowledge in comments section.
Now since we have installed basic Linux VM as per our previous guide, we need to add additional Ethernet card for Oracle clusterware private interconnect IP.
Make sure that the OS is shutdown cleanly and VM shows Powered off status.
In VMWare, select the VM, right click and select Settings. Same option is available in Oracle VirtualBox as well.
You will see above screen. Make sure that the memory is set to 3GB or 2.5GB. Click on “Add” to add new hardware
Select “Network Adapter” from the list and click Next
Select “Host-only” network and click Finish
The settings page should now look as above. Click Ok to close the window.
Start up the Linux operating system in VM and login with root account.
Click on System-> Administration-> Network to open network configuration screen
Click Edit to confirm the IP address.
Optionally you can disable MAC address binding since you will clone this VM to another node.
You will see one interface eth0 here. Now we will add another interface in Linux for the new virtual network card. Click on New
Specify another IP address in different range. Our previous eth0 IP is 192.168.1.121 so we have selected different subnet 192.168.2.121 for eth1
Do not specify any default gateway address here since these servers are generally connected to each other physically so in VM as well we will do the same.
Make sure that the hostname is appearing correctly under DNS tab. You can change hostname here if required.
You will see that still new interface shows as Inactive. Select the interface and click “Activate“
Now both will show up as “Active”. Make sure to save configuration by clicking on “File-> Save”.
Once you have saved the configuration, you can restart network service to see if the new configuration is still active.
[root@dbhost1 ~] service network restart
Comment out entries from /etc/resolv.conf to disable DNS search if you are not using DNS to resolve host names. This will greatly improve performance of VM in general especially NFS
Note: in 12c we need to rename /etc/resolv.conf file if you are not using DNS since the pre-requisites check will fail otherwise.
[root@dbhost1 ~]# mv /etc/resolv.conf /etc/resolv.conf_bak
If you are just modifying existing Linux VM and changing host name only then make sure that the new hostname is already present in following file. For fresh installation this will be already present.
Create following entries in /etc/hosts file
[root@dbhost1 ~]# more /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
#::1 localhost6.localdomain6 localhost6
192.168.1.121 dbhost1.paramlabs.com dbhost1
192.168.1.122 dbhost2.paramlabs.com dbhost2
192.168.1.123 dbhost1-vip.paramlabs.com dbhost1-vip
192.168.1.124 dbhost2-vip.paramlabs.com dbhost2-vip
192.168.2.121 dbhost1-priv.paramlabs.com dbhost1-priv
192.168.2.122 dbhost2-priv.paramlabs.com dbhost2-priv
192.168.1.125 dbhost-scan.paramlabs.com dbhost-scan
192.168.1.121 nfshost.paramlabs.com nfshost
Let me explain why we have made these entries.
dbhost1 and dbhost2 are primary IP addresses for both Virtual nodes. Though we are yet to create node2, let us create these entries so that when we clone/copy this VM, we will already have these entries present in second node.
dbhost1-vip and dbhost2-vip are going to be used as VIP for 11gR2 RAC. These IPs will be assigned to interface aliases on respective host where vip1 and vip2 will be active. This will be handled transparently by Oracle RAC
dbhost1-priv and dbhost2-priv are private interfaces for node1 and node2. These will work as interconnect IP addresses for these nodes. In physical servers, these interfaces are connected through a cross-cable or stand-alone switch (recommended). While in VM, this will be taken care of automatically.
Make sure that you are able to ping primary IP of node1.
[root@ dbhost1~]# ping dbhost1 -c1
PING dbhost1.paramlabs.com (192.168.1.121) 56(84) bytes of data.
64 bytes from dbhost1.paramlabs.com (192.168.1.121): icmp_seq=1 ttl=64 time=0.076 ms
— dbhost1.paramlabs.com ping statistics —
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.076/0.076/0.076/0.000 ms
If you are not using time synchronization using NTP then make sure that the service is stopped.
[root@ dbhost1~]# service ntpd status
ntpd is stopped
Run following on both nodes to rename ntp.conf file
[root@ dbhost1~]# mv /etc/ntp.conf /etc/ntp.conf.orig
Let us now create required users.
First create owner user for Oracle clusterware/grid.
[root@dbhost1 ~]# useradd -g dba -G oinstall grid
[root@dbhost1 ~]# passwd grid
Changing password for user grid.
New UNIX password:
Retype new UNIX password:
passwd: all authentication tokens updated successfully.
Since we already have user named oracle (as part of our linux installation steps), we will make sure that the groups are set correctly. This will be database owner user.
[root@ dbhost1~]# usermod -g dba -G oinstall oracle
[root@ dbhost1~]# passwd oracle
Changing password for user oracle.
New UNIX password:
Retype new UNIX password:
passwd: all authentication tokens updated successfully.
Since the prerequisites are already installed as part of our Linux installation we will skip that for now. The clusterware installation might ask for some more pre-requisites but it will provide a fix script to automatically change the values so we can go ahead here.
Let us create the required directories so that when we clone this VM, the second node also will already have these ready.
[root@dbhost1 ~]# mkdir -p /app/oracle
[root@dbhost1 ~]# mkdir -p /app/12.1.0/grid
[root@dbhost1 ~]# chown grid:dba /app
[root@dbhost1 ~]# chown grid:dba /app/oracle
[root@dbhost1 ~]# chown grid:dba /app/12.1.0
[root@dbhost1 ~]# chown grid:dba /app/12.1.0/grid
[root@dbhost1 ~]# chmod -R g+w /app
Now let us create the mount points. Here we will mount the shared file system on both nodes. For now just create these files. The shared file system will be created in later step.
[root@dbhost1 ~]# mkdir /u01
[root@dbhost1 ~]# mkdir /u02
[root@dbhost1 ~]# mkdir /u03
[root@dbhost1 ~]# chown grid:dba /u01
[root@dbhost1 ~]# chown grid:dba /u02
[root@dbhost1 ~]# chown grid:dba /u03
[root@dbhost1 ~]# chmod g+w /u01
[root@dbhost1 ~]# chmod g+w /u02
[root@dbhost1 ~]# chmod g+w /u03
Now we need to setup shared file system for these nodes since having shared storage is a must for Oracle RAC
Since we are not using any external storage, NAS or SAN, we will host the shared file system on node 1 and share the same with node 2 using NFS. This is not recommended for production but since we are not using external storage for VMs this is the best way to achieve shared file system.
Note: Please do not use VMWare’s shared folders option since it is not cluster-aware and cannot make sure that read/writes from multiple hosts are handled properly. This can cause cluster panic so use NFS only for this VM purpose. Also we are not using VirtualBox shared disk option since we want to keep it generic in nature.
Since we are not using shared storage for Virtual Machines, we are sharing disks via NFS from one node to another. Here is how the VMs can be represented.
Login to Node 1 using root user. Please note that these steps are ONLY to be done on Node 1, not on node 2.
Let us first create the directories which will host the shared data.
[root@dbhost1 ~]# mkdir /shared_1
[root@dbhost1 ~]# mkdir /shared_2
[root@dbhost1 ~]# mkdir /shared_3
[root@dbhost1 ~]# chown grid:dba /shared_1
[root@dbhost1 ~]# chown grid:dba /shared_2
[root@dbhost1 ~]# chown grid:dba /shared_3
[root@dbhost1 ~]# chmod g+w /shared_1
[root@dbhost1 ~]# chmod g+w /shared_2
[root@dbhost1 ~]# chmod g+w /shared_3
Now we need to enable these directories to be shared over NFS. Enter following details in /etc/exports file
You will need uid and guid for user grid. You can find it by executing “id” command while logged in as “grid” user.
[grid@dbhost1 ~]# id
uid=54322(grid) gid=54322(dba) groups=54322(dba),54323(oinstall)
[root@dbhost1 ~]# more /etc/exports/shared_1 *(rw,sync,no_root_squash,insecure,anonuid=54322,anongid=54322)/shared_2 *(rw,sync,no_root_squash,insecure,anonuid=54322,anongid=54322)/shared_3 *(rw,sync,no_root_squash,insecure,anonuid=54322,anongid=54322)
Check if NFS service is running. If not we need to start it.
[root@ dbhost1~]# service nfs status
rpc.mountd is stopped
nfsd is stopped
rpc.rquotad is stopped
[root@ dbhost1~]# chkconfig nfs on
[root@ dbhost1~]# service nfs start
Starting NFS services: [ OK ]
Starting NFS quotas: [ OK ]
Starting NFS daemon: [ OK ]
Starting NFS mountd: [ OK ]
Stopping RPC idmapd: [ OK ]
Starting RPC idmapd: [ OK ]
These above steps have enabled the newly created shared directories for NFS mount.
Now following steps need to be done on both Node 1 and Node 2
“Append” following entries in /etc/fstab file
[root@dbhost1 ~]# tail -3 /etc/fstab
nfshost:/shared_1 /u01 nfs rw,bg,hard,nolock,noac,nointr,tcp,vers=3,timeo=600,rsize=32768,wsize=32768,actimeo=0 0 0
nfshost:/shared_2 /u02 nfs rw,bg,hard,nolock,noac,nointr,tcp,vers=3,timeo=600,rsize=32768,wsize=32768,actimeo=0 0 0
nfshost:/shared_3 /u03 nfs rw,bg,hard,nolock,noac,nointr,tcp,vers=3,timeo=600,rsize=32768,wsize=32768,actimeo=0 0 0
[root@dbhost2 ~]# tail -3 /etc/fstab
nfshost:/shared_1 /u01 nfs rw,bg,hard,nolock,noac,nointr,tcp,vers=3,timeo=600,rsize=32768,wsize=32768,actimeo=0 0 0
nfshost:/shared_2 /u02 nfs rw,bg,hard,nolock,noac,nointr,tcp,vers=3,timeo=600,rsize=32768,wsize=32768,actimeo=0 0 0
nfshost:/shared_3 /u03 nfs rw,bg,hard,nolock,noac,nointr,tcp,vers=3,timeo=600,rsize=32768,wsize=32768,actimeo=0 0 0
Let us mount each of these shared directories to the mount points created earlier. This is not required to be done from next restart since system will automatically mount them based on /etc/fstab entries.
[root@dbhost1 ~]# mount /u01
[root@dbhost1 ~]# mount /u02
[root@dbhost1 ~]# mount /u03
Same on node 2
[root@dbhost2 ~]# mount /u01
[root@dbhost2 ~]# mount /u02
[root@dbhost2 ~]# mount /u03
Confirm if these directories are mounted correctly.
[root@dbhost1 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
283G 4.6G 264G 2% /
/dev/sda1 99M 41M 53M 44% /boot
tmpfs 1002M 0 1002M 0% /dev/shm
nfshost:/shared_1 283G 4.6G 264G 2% /u01
nfshost:/shared_2 283G 4.6G 264G 2% /u02
nfshost:/shared_3 283G 4.6G 264G 2% /u03
Same on node 2
[root@dbhost2 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
283G 4.6G 264G 2% /
/dev/sda1 99M 41M 53M 44% /boot
tmpfs 1002M 0 1002M 0% /dev/shm
nfshost:/shared_1 283G 4.6G 264G 2% /u01
nfshost:/shared_2 283G 4.6G 264G 2% /u02
nfshost:/shared_3 283G 4.6G 264G 2% /u03
As I said, next time when you restart, automatically these directories will be mounted,
IMPORTANT NOTE: Whenever you are restarting both servers, make sure that you let Node 1 start properly before starting Node 2. The reason being, the shared file system is hosted on Node 1 so if node 2 starts before node 1 has enabled NFS share during startup, the mount points will not come up on Node 2. This will especially be a problem once our clusterware and RAC database are installed.
Setting up user-equivalence on both nodes (Passwordless SSH setup)
Having passwordless ssh connectivity is a must for RAC installation. This is required for both nodes to communicate with each other and passing commands to each node during runtime and maintenance.
We will setup user-equivalence for both oracle and grid users. Let us start with grid owner user grid first.
Perform following on Node1
We will use all 4 combinations every time. i.e. dbhost1, dbhost1.paramlabs.com (fully qualified domain name), dbhost2, dbhost2.paramlabs.com
[grid@dbhost1 ~]$ ssh grid@dbhost2
The authenticity of host ‘dbhost2 (192.168.1.122)’ can’t be established.
RSA key fingerprint is
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ‘dbhost2,192.168.1.122′ (RSA) to the list of known hosts.
grid@dbhost2’s password:
[grid@dbhost2 ~]$ exit
logout
Connection to dbhost2 closed.
[grid@dbhost1 ~]$ ssh grid@dbhost1
The authenticity of host ‘dbhost1 (192.168.1.121)’ can’t be established.
RSA key fingerprint is
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ‘dbhost1,192.168.1.121′ (RSA) to the list of known hosts.
grid@dbhost1’s password:
[grid@dbhost1 ~]$ exit
logout
Connection to dbhost1 closed.
[grid@dbhost1 ~]$ ssh grid@dbhost1.paramlabs.com
The authenticity of host ‘dbhost1.paramlabs.com (192.168.1.121)’ can’t be established.
RSA key fingerprint is
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ‘dbhost1.paramlabs.com’ (RSA) to the list of known hosts.
grid@dbhost1.paramlabs.com’s password:
[grid@dbhost1 ~]$ ssh grid@dbhost2.paramlabs.com
The authenticity of host ‘dbhost2.paramlabs.com (192.168.1.122)’ can’t be established.
RSA key fingerprint is
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ‘dbhost2.paramlabs.com’ (RSA) to the list of known hosts.
grid@dbhost2.paramlabs.com’s password:
Last login: Mon Jul 8 13:24:19 2013 from dbhost1.paramlabs.com
[grid@dbhost1 ~]$ ssh-keygen -t dsa
Generating public/private dsa key pair.
Enter file in which to save the key (/home/grid/.ssh/id_dsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/grid/.ssh/id_dsa.
Your public key has been saved in /home/grid/.ssh/id_dsa.pub.
The key fingerprint is:
xxxxxx grid@dbhost1.paramlabs.com
[grid@dbhost1 ~]$ ls -ltr /home/grid/.ssh/
total 12
-rw-r–r– 1 grid dba 1612 Jul 8 13:25 known_hosts
-rw-r–r– 1 grid dba 616 Jul 8 13:26 id_dsa.pub
-rw——- 1 grid dba 668 Jul 8 13:26 id_dsa
[grid@dbhost2 ~]$ ssh-keygen -t dsa
Generating public/private dsa key pair.
Enter file in which to save the key (/home/grid/.ssh/id_dsa):
Created directory ‘/home/grid/.ssh’.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/grid/.ssh/id_dsa.
Your public key has been saved in /home/grid/.ssh/id_dsa.pub.
The key fingerprint is:
xxxx grid@dbhost2.paramlabs.com
[grid@dbhost2 ~]$ ls -ltr /home/grid/.ssh
total 8
-rw-r–r– 1 grid dba 616 Jul 8 13:28 id_dsa.pub
-rw——- 1 grid dba 668 Jul 8 13:28 id_dsa
[grid@dbhost1 ~]$ scp /home/grid/.ssh/id_dsa.pub grid@dbhost2:/home/grid/.ssh/authorized_keys
grid@dbhost2’s password:
id_dsa.pub 100% 616 0.6KB/s 00:00
[grid@dbhost2 ~]$ scp /home/grid/.ssh/id_dsa.pub grid@dbhost1:/home/grid/.ssh/authorized_keys
The authenticity of host ‘dbhost1 (192.168.1.121)’ can’t be established.
RSA key fingerprint is
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ‘dbhost1,192.168.1.121′ (RSA) to the list of known hosts.
grid@dbhost1’s password:
id_dsa.pub 100% 616 0.6KB/s 00:00
[grid@dbhost1 ~]$ cat /home/grid/.ssh/id_dsa.pub >> /home/grid/.ssh/authorized_keys
[grid@dbhost2 ~]$ cat /home/grid/.ssh/id_dsa.pub >> /home/grid/.ssh/authorized_keys
Now let us test the passwordless connectivity between these 2 nodes using grid user. It should not prompt for password. In that case the test will be successful.
[grid@dbhost1 ~]$ ssh grid@dbhost1
Last login: Mon Jul 8 13:30:02 2013 from dbhost2.paramlabs.com
[grid@dbhost1 ~]$ exit
logout
Connection to dbhost1 closed.
[grid@dbhost1 ~]$ ssh grid@dbhost2
Last login: Mon Jul 8 13:30:10 2013 from dbhost2.paramlabs.com
[grid@dbhost2 ~]$ exit
logout
Connection to dbhost2 closed.
[grid@dbhost1 ~]$ ssh grid@dbhost1.paramlabs.com
Last login: Mon Jul 8 13:31:38 2013 from dbhost1.paramlabs.com
[grid@dbhost1 ~]$ exit
logout
Connection to dbhost1.paramlabs.com closed.
[grid@dbhost1 ~]$ ssh grid@dbhost2.paramlabs.com
Last login: Mon Jul 8 13:31:41 2013 from dbhost1.paramlabs.com
[grid@dbhost2 ~]$ exit
logout
Connection to dbhost2.paramlabs.com closed.
Let’s do the same on dbhost2
[grid@dbhost2 ~]$ ssh grid@dbhost1
Last login: Mon Jul 8 13:31:46 2013 from dbhost1.paramlabs.com
[grid@dbhost1 ~]$ exit
logout
Connection to dbhost1 closed.
[grid@dbhost2 ~]$ ssh grid@dbhost2
Last login: Mon Jul 8 13:31:50 2013 from dbhost1.paramlabs.com
[grid@dbhost2 ~]$ exit
logout
Connection to dbhost2 closed.
[grid@dbhost2 ~]$ ssh grid@dbhost1.paramlabs.com
The authenticity of host ‘dbhost1.paramlabs.com (192.168.1.121)’ can’t be established.
RSA key fingerprint is
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ‘dbhost1.paramlabs.com’ (RSA) to the list of known hosts.
Last login: Mon Jul 8 13:32:09 2013 from dbhost2.paramlabs.com
[grid@dbhost1 ~]$ exit
logout
Connection to dbhost1.paramlabs.com closed.
[grid@dbhost2 ~]$ ssh grid@dbhost2.paramlabs.com
The authenticity of host ‘dbhost2.paramlabs.com (192.168.1.122)’ can’t be established.
RSA key fingerprint is
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ‘dbhost2.paramlabs.com’ (RSA) to the list of known hosts.
Last login: Mon Jul 8 13:32:11 2013 from dbhost2.paramlabs.com
[grid@dbhost2 ~]$ exit
logout
Connection to dbhost2.paramlabs.com closed.
This concludes passwordless ssh setup for grid user. Let us do the same exercise for oracle user.
Let us generate public key for dbhost1. Accept defaults and press enter whenever prompted.
[oracle@dbhost1 ~]$ ssh-keygen -t dsa
Generating public/private dsa key pair.
Enter file in which to save the key (/home/oracle/.ssh/id_dsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/oracle/.ssh/id_dsa.
Your public key has been saved in /home/oracle/.ssh/id_dsa.pub.
The key fingerprint is:
xxxxx oracle@dbhost1.paramlabs.com
Now let us generate public key for dbhost2. Accept defaults and press enter whenever prompted.
[oracle@dbhost2 ~]$ ssh-keygen -t dsa
Generating public/private dsa key pair.
Enter file in which to save the key (/home/oracle/.ssh/id_dsa):
Created directory ‘/home/oracle/.ssh’.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/oracle/.ssh/id_dsa.
Your public key has been saved in /home/oracle/.ssh/id_dsa.pub.
The key fingerprint is:
xxxxx oracle@dbhost2.paramlabs.com
[oracle@dbhost1 ~]$ ls -ltr /home/oracle/.ssh/
total 8
-rw-r–r– 1 oracle oinstall 618 Jul 8 19:55 id_dsa.pub
-rw——- 1 oracle oinstall 672 Jul 8 19:55 id_dsa
[oracle@dbhost2 ~]$ ls -ltr /home/oracle/.ssh/
total 8
-rw-r–r– 1 oracle oinstall 618 Jul 8 19:55 id_dsa.pub
-rw——- 1 oracle oinstall 668 Jul 8 19:55 id_dsa
Now we need to copy this public key to second host in order to authorize it to connect to this host using this (oracle) user without password. We will save this public key in a file named authorized_keys on node 2.
[oracle@dbhost1~]$ cd /home/oracle/.ssh/
[oracle@dbhost1 .ssh]$ scp id_dsa.pub oracle@dbhost2:/home/oracle/.ssh/authorized_keys
The authenticity of host ‘dbhost2 (192.168.1.122)’ can’t be established.
RSA key fingerprint is
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ‘dbhost2,192.168.1.122′ (RSA) to the list of known hosts.
oracle@dbhost2’s password:
id_dsa.pub
[oracle@dbhost2 ~]$ cd /home/oracle/.ssh/
[oracle@dbhost2 ~]$ scp id_dsa.pub oracle@dbhost1:/home/oracle/.ssh/authorized_keys
The authenticity of host ‘dbhost1 (192.168.1.121)’ can’t be established.
RSA key fingerprint is
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ‘dbhost1,192.168.1.121′ (RSA) to the list of known hosts.
oracle@dbhost1’s password:
id_dsa.pub 100% 618 0.6KB/s 00:00
Also we will append the public key for dbhost1 to itself as well so that it can do ssh to samebox without password (2 of the 4 combinations)
[oracle@dbhost1 .ssh]$ cat id_dsa.pub >> authorized_keys
[oracle@dbhost2 .ssh]$ cat id_dsa.pub >> authorized_keys
Now let us test the passwordless connectivity between these 2 nodes using oracle user.
[oracle@dbhost1 .ssh]$ ssh oracle@dbhost1
The authenticity of host ‘dbhost1 (192.168.1.121)’ can’t be established.
RSA key fingerprint is
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ‘dbhost1,192.168.1.121′ (RSA) to the list of known hosts.
Last login: Mon Jul 8 19:54:43 2013 from 192.168.1.181
[oracle@dbhost1 ~]$ exit
logout
Connection to dbhost1 closed.
[oracle@dbhost1 .ssh]$ ssh oracle@dbhost2
Last login: Mon Jul 8 19:54:49 2013 from 192.168.1.181
[oracle@dbhost2 ~]$ exit
logout
Connection to dbhost2 closed.
[oracle@dbhost1 .ssh]$ ssh oracle@dbhost1.paramlabs.com
The authenticity of host ‘dbhost1.paramlabs.com (192.168.1.121)’ can’t be established.
RSA key fingerprint is a
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ‘dbhost1.paramlabs.com’ (RSA) to the list of known hosts.
Last login: Mon Jul 8 19:58:48 2013 from dbhost1.paramlabs.com
[oracle@dbhost1 ~]$ exit
logout
Connection to dbhost1.paramlabs.com closed.
[oracle@dbhost1 .ssh]$ ssh oracle@dbhost2.paramlabs.com
The authenticity of host ‘dbhost2.paramlabs.com (192.168.1.122)’ can’t be established.
RSA key fingerprint is
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ‘dbhost2.paramlabs.com’ (RSA) to the list of known hosts.
Last login: Mon Jul 8 19:58:51 2013 from dbhost1.paramlabs.com
[oracle@dbhost2 ~]$ exit
logout
Connection to dbhost2.paramlabs.com closed.
Now do the similar steps on Node 2 (dbhost2)
[oracle@dbhost2 .ssh]$ ssh oracle@dbhost1
Last login: Mon Jul 8 19:58:57 2013 from dbhost1.paramlabs.com
[oracle@dbhost1 ~]$ exit
logout
Connection to dbhost1 closed.
[oracle@dbhost2 .ssh]$ ssh oracle@dbhost2
The authenticity of host ‘dbhost2 (192.168.1.122)’ can’t be established.
RSA key fingerprint is
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ‘dbhost2,192.168.1.122′ (RSA) to the list of known hosts.
Last login: Mon Jul 8 19:59:02 2013 from dbhost1.paramlabs.com
[oracle@dbhost2 ~]$ exit
logout
Connection to dbhost2 closed.
[oracle@dbhost2 .ssh]$ ssh oracle@dbhost1.paramlabs.com
The authenticity of host ‘dbhost1.paramlabs.com (192.168.1.121)’ can’t be established.
RSA key fingerprint is
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ‘dbhost1.paramlabs.com’ (RSA) to the list of known hosts.
Last login: Mon Jul 8 19:59:17 2013 from dbhost2.paramlabs.com
[oracle@dbhost1 ~]$ exit
logout
Connection to dbhost1.paramlabs.com closed.
[oracle@dbhost2 .ssh]$ ssh oracle@dbhost2.paramlabs.com
The authenticity of host ‘dbhost2.paramlabs.com (192.168.1.122)’ can’t be established.
RSA key fingerprint is
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ‘dbhost2.paramlabs.com’ (RSA) to the list of known hosts.
Last login: Mon Jul 8 19:59:20 2013 from dbhost2.paramlabs.com
[oracle@dbhost2 ~]$ exit
logout
Connection to dbhost2.paramlabs.com closed.
The grid infrastructure (clusterware) or database installation needs to be started only on one node since it will propagate the files to remote node automatically during the installation.
If you have the setup files on your host machine, you can share the setup folder to the VM using VMWare or Oracle VirtualBox shared folder option.
Following screen shows how to share a folder to VM using VMWare. This can be done even when the VM is online.
The files which you share using above option will be available by default at /mnt/hgfs/ directory under Linux.
Now let us start the Oracle Clusterware installation.
Before proceeding, please make following change if you are not using DNS if you did not do this already in previous step.
[root@dbhost1 ~]# mv /etc/resolv.conf /etc/resolv.conf_bak
[root@dbhost2 ~]# mv /etc/resolv.conf /etc/resolv.conf_bak
Login with grid user (grid owner)
[grid@dbhost1 ~]$ cd /mnt/hgfs/Setup/grid/
Start the installation using ./runInstaller script
[grid@dbhost1 grid]$ ./runInstaller
Select “Skip software updates” and click Next
Select “Install and Configure Oracle Grid Infrastructure for a Cluster” and click Next
You can see an interesting new feature here called “Flex cluster“. This allows to flexibly use set of servers assigned in a flex server to select roles like database, application etc. We will discuss about this in details later.
Select “Configure a Standard cluster” and click Next
Select “Advanced installation” and click Next
Click Next
Enter details as follows and click Next. You can change the values as you want but make sure to use same values as you entered if required in other screens.
Cluster Name: dbhost-cluster
SCAN Name: dbhost-scan.paramlabs.com
SCAN Port: 1521
Deselect GNS. Click Next
You will see only first host here. We need to add second node in the cluster. Click Add
Enter details of second host and virtual hostname (dbhost2-vip.paramlabs.com) and click OK
Select both nodes. Click “SSH connectivity“. And select Test. The test should be successful.
Click Next
There is a new concept of Oracle Flex ASM storage in 12c. If you are planning to use it then you can select “ASM and Private” for second interface or you can also assign a different interface later.
We will use only shared file system so we will select only “Private” here.
Select Private for eth1 and leave public for eth0 (automatically detected). Click Next
Oracle recommends that you create a Grid Infrastructure Management Repository.
This repository is an optional component, but if you do not select this feature during installation, then you lose access to Oracle Database Quality of Service management, Memory Guard, and Cluster Health Monitor. You cannot enable these features after installation except by reinstalling Oracle Grid Infrastructure.
We will discuss this feature in another post. Let us select “Yes” here. You can choose No as well if you are not planning to do advanced activities on cluster as mentioned above. Click Next
Select “Use Shared File System” and click Next
Important Note: Since having normal redundancy increases the load on VM to make sure NFS communicates and keeps all these files in sync all the time, we might face issues during normal run of the Oracle RAC.
So please select EXTERNAL REDUNDANCY which means that you are going to mirror this disk using external methods. Though we are not using any external mirroring here but still for the non-production and learning purpose we can take this risk.
Enter following value in External Redundancy box. Click Next
/u02/storage/ocr
Important Note: Since having normal redundancy increases the load on VM to make sure NFS communicates and keeps all these files in sync all the time, we might face issues during normal run of the Oracle RAC.
So please select EXTERNAL REDUNDANCY which means that you are going to mirror this disk using external methods. Though we are not using any external mirroring here but still for the non-production and learning purpose we can take this risk.
Enter following value in External Redundancy box. Click Next
/u03/storage/vdsk
Select “Do not use IPMI” and click Next
We have selected dba for all the above groups, you can choose different if you wish to. Click Next
If you chose dba as all above groups, you might see above message box, click Yes
Enter following values and click Next
Oracle Base: /app/grid
Software Location: /app/12.1.0/grid
Click Next
Click Next
In 12c the installer itself can run various root user scripts on its own if we provide root password here. Select the checkbox and enter root password. You can skip this as well but in that case you will be prompted to run scripts manually. Click Next
Click on zeroconf check and select “more details” from bottom pan.
We can fix is as follows.
[root@dbhost1 ~]# cp -pr /etc/sysconfig/network /etc/sysconfig/network.bak
Update the file as follows.
[root@dbhost1 ~]# more /etc/sysconfig/network
# Added NOZEROCONF as pre-requisite for 12c
NOZEROCONF=yes
NETWORKING=yes
NETWORKING_IPV6=yes
HOSTNAME=dbhost1.paramlabs.com
[root@dbhost2 ~]# cp -pr /etc/sysconfig/network /etc/sysconfig/network.bak
Update the file as follows.
[root@dbhost2 ~]# more /etc/sysconfig/network
# Added NOZEROCONF as pre-requisite for 12c
NOZEROCONF=yes
NETWORKING=yes
NETWORKING_IPV6=yes
HOSTNAME=dbhost2.paramlabs.com
You can see that some of the dependencies installer can fix on its own. Click “Fix & Check Again” to see what all it can fix automatically.
You will see above screen if you have already provided root password earlier. Click OK to let it run the fix scripts and start validation again.
You can see result of fixup script on second tab.
We can ignore this since we know 3 GB is good enough for this J
Click “Ignore all” and click Next
Click Yes
Save Response file if required. Click Next
At this point it will prompt that installer will run root scripts automatically using previous password. Click Yes
You can click details of current activity by clicking on “Details” button.
At this point installer will error out with following message.
No need to panic. This is expected since we did not use DNS and installer tries to resolve the SCAN name using DNS. You can confirm this in the log file.
===================
INFO: PRVG-1101 : SCAN name “dbhost-scan.paramlabs.com” failed to resolve
INFO: ERROR:
INFO: PRVF-4657 : Name resolution setup check for “dbhost-scan.paramlabs.com” (IP address: 192.168.1.125) failed
INFO: ERROR:
INFO: PRVF-4664 : Found inconsistent name resolution entries for SCAN name “dbhost-scan.paramlabs.com”
INFO: Checking SCAN IP addresses…
INFO: Check of SCAN IP addresses passed
INFO: Verification of SCAN VIP and Listener setup failed
==================
Click Skip
Click Next
Click Yes
Click Close to finish the installation
Verify that the cluster services are started properly on both nodes.
[grid@dbhost1 logs]$ /app/12.1.0/grid/bin/srvctl status nodeapps
VIP dbhost1-vip.paramlabs.com is enabled
VIP dbhost1-vip.paramlabs.com is running on node: dbhost1
VIP dbhost2-vip.paramlabs.com is enabled
VIP dbhost2-vip.paramlabs.com is running on node: dbhost2
Network is enabled
Network is running on node: dbhost1
Network is running on node: dbhost2
ONS is enabled
ONS daemon is running on node: dbhost1
ONS daemon is running on node: dbhost2
This concludes the 12c Grid infrastructure installation. Next step is installation of database software and creating RAC database.
You can start database installation from <stage>/database directory as follows. Make sure to use database owner user oracle.
[oracle@dbhost1 ~]$ cd /mnt/hgfs/Setup/database/
[oracle@dbhost1 database]$ ./runInstaller
Deselect the checkbox and click Next
Click Yes
Select “Skip software updates” and click Next
Select “Create and configure a database“. We can also install database software and later create database using DBCA. But here we will choose to create database as well. Click Next
Select “Server class” and click Next
Select “Oracle Real Application Clusters database installation” and click Next
Select “Admin managed” and click Next
Make sure to select both nodes. Click “SSH connectivity“.
Click Test
This confirms that passwordless ssh is setup between both nodes with oracle user. Click OK
Select “Advanced install” and click Next
Click Next
Select “Enterprise Edition” and click Next
Select Oracle base as above and click Next
Select “General purpose” and click Next
Enter Global database name as “rac12c.paramlabs.com” or whichever desired name and click Next
Select appropriate total memory to be assigned. Click on “Character sets” tab
Select “Unicode” and click Next
Select “File system” and enter value as “/u01/oradata”. Click Next
Note: Oracle Enterprise Manager Database Express is always installed and configured by default irrespective of whether you register Oracle Enterprise Manager Cloud Control.
Since we do not have 12c Cloud control yet, we have kept it unchecked. If you have one then provide details here and click Next
Since this is only for testing, we are deselecting recovery. If required then check this. Click Next
We are entering same password for all users here to keep everything simple. Click Next
Click Yes
Select appropriate groups but here we are using only “dba” group. Click Next
The error for SCAN is since we are not using DNS. We can manually make sure that SCAN is reachable from both nodes.
===================
[root@dbhost1 ~]# ping -c 1 dbhost-scan.paramlabs.com
PING dbhost-scan.paramlabs.com (192.168.1.125) 56(84) bytes of data.
64 bytes from dbhost-scan.paramlabs.com (192.168.1.125): icmp_seq=1 ttl=64 time=0.044 ms
— dbhost-scan.paramlabs.com ping statistics —
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.044/0.044/0.044/0.000 ms
[root@dbhost2 ~]# ping -c 1 dbhost-scan.paramlabs.com
PING dbhost-scan.paramlabs.com (192.168.1.125) 56(84) bytes of data.
64 bytes from dbhost-scan.paramlabs.com (192.168.1.125): icmp_seq=1 ttl=64 time=0.498 ms
— dbhost-scan.paramlabs.com ping statistics —
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.498/0.498/0.498/0.000 ms
===================
Click “Ignore All” to ignore this error. Click Next
Click Yes
Save Response file if required and click “Install” to start installation
It will prompt us to execute above script as root user on both nodes manually.
[root@dbhost1 ~]# /app/oracle/product/12.1.0/dbhome_1/root.sh
Performing root user operation for Oracle 12c
The following environment variables are set as:
ORACLE_OWNER= oracle
ORACLE_HOME= /app/oracle/product/12.1.0/dbhome_1
Enter the full pathname of the local bin directory: [/usr/local/bin]:
The contents of “dbhome” have not changed. No need to overwrite.
The contents of “oraenv” have not changed. No need to overwrite.
The contents of “coraenv” have not changed. No need to overwrite.
Entries will be added to the /etc/oratab file as needed by
Database Configuration Assistant when a database is created
Finished running generic part of root script.
Now product-specific root actions will be performed.
[root@dbhost2 ~]# /app/oracle/product/12.1.0/dbhome_1/root.sh
Performing root user operation for Oracle 12c
The following environment variables are set as:
ORACLE_OWNER= oracle
ORACLE_HOME= /app/oracle/product/12.1.0/dbhome_1
Enter the full pathname of the local bin directory: [/usr/local/bin]:
The contents of “dbhome” have not changed. No need to overwrite.
The contents of “oraenv” have not changed. No need to overwrite.
The contents of “coraenv” have not changed. No need to overwrite.
Entries will be added to the /etc/oratab file as needed by
Database Configuration Assistant when a database is created
Finished running generic part of root script.
Now product-specific root actions will be performed.
Now it will automatically launch the database configuration assistant since we selected option of creating database as well.
Above is the summary screen. Make a note of EM database “Express” URL for future reference.
Click Close to finish the installation.
Let us make sure if database is registered and started properly.
[oracle@dbhost1 database]$ export ORACLE_HOME=/app/oracle/product/12.1.0/dbhome_1
[oracle@dbhost1 database]$ export PATH=$ORACLE_HOME/bin:$PATH
[oracle@dbhost1 database]$ export ORACLE_SID=rac12c1
[oracle@dbhost1 database]$ srvctl status database -d rac12c
Instance rac12c1 is running on node dbhost1
Instance rac12c2 is running on node dbhost2
[oracle@dbhost1 database]$ sqlplus / as sysdba
Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.1.0 – 64bit Production
With the Partitioning, Real Application Clusters, OLAP, Advanced Analytics
and Real Application Testing options
SQL> select instance_name, status from gv$instance;
INSTANCE_NAME STATUS
—————- ————
rac12c1 OPEN
rac12c2 OPEN
This concludes 12c RAC database installation. A lot of new posts will come soon where we will discuss the new features, tips and tricks of 12c. Also a new set of trainings will be introduced for 12c as we explore 12c in more details.
Happy learning !
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