Step By Step Instructions on Installing Oracle 11g R1 Clusterware Software (11.1.0.6) 32-bit on CentOS EL 4 Update 5 x86

This document explains the step by step process of installing Oracle 11g R1 (11.1.0.6) Clusterware Software.

Task List:

Setting Up oracle user Environment
Running OUI (oracle Universal Installer) to install 10g RAC Clusterware
Verify CRS status.
Verify Nodeapps status

Setting Up Oracle Environment:

Add the below lines into the .bash_profile under the oracle home directory to set the CRS_HOME in the session.
export CRS_HOME=/u01/app/crs

Running OUI (Oracle Universal Installer) to install Oracle Clusterware:

Complete the following steps to install Oracle Clusterware on your cluster. You need to run the runInstaller from ONLY ONE node (any single node in the cluster). Start the runInstaller command as oracle user from any one node When OUI displays the Welcome page, click Next

Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified
                                                                                                                           
Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable.

If you get the above error, please execute the below command as root and then start the runInstaller by connecting as oracle.

[root@node1-pub ~]# xhost +
access control disabled, clients can connect from any host
[root@node1-pub ~]# su - oracle
[oracle@node1-pub ~]$ /mnt/cdrom/runInstaller

        

At this step, you should not receive any error. If you have configured the Pre-Installation steps correctly, then you will not get any errors. I get one warning here as you can see which is complaining about the low memory than required. I had only 512 MB ram and the required memory is 1GB but I would not worry about this warning and will check the status box.


Check whether the interface has correct subnet mask and type associated to it. If you have configured the network for all the nodes correctly

Enter the filename and location (mount point) for the OCR file. In the Pre-Instalation steps, I have configured ocfs2 for the OCR files (/u02/oradata/ocr).

Use the same mount point as OCR files and enter the filename you want for Voting Disk file. If you choose the External Redundancy, then you need to mention only one location.

At the below step, the Oracle Cluster Verification Utility gets failed because CentOS is not a certified Linux OS for the 11g RAC installation. Simply ignore this error and continue.

Verifying CRS status:

The below commands can be used to verify the CRS status.

crsctl check crs <<-- for the local nodecrsctl check cluster <<-- for remote nodes in the cluster

[root@node1-pub ~]# crsctl check crs
Cluster Synchronization Services appears healthy
Cluster Ready Services appears healthy
Event Manager appears healthy
[root@node1-pub ~]#
For the below command to run successfully, CSS needs to be running on the local node.

[root@node1-pub ~]# crsctl check cluster
node1-pub    ONLINE
node2-pub    ONLINE

Verifying Nodeapps Status:

Now, verify that the nodeapps are configured and running by executing the below command.
[oracle@node2-pub dbs]$ crs_stat -t
Name           Type           Target    State     Host        
------------------------------------------------------------ 
ora....pub.gsd application    ONLINE    ONLINE    node1-pub   
ora....pub.ons application    ONLINE    ONLINE    node1-pub   
ora....pub.vip application    ONLINE    ONLINE    node1-pub   
ora....pub.gsd application    ONLINE    ONLINE    node2-pub   
ora....pub.ons application    ONLINE    ONLINE    node2-pub   
ora....pub.vip application    ONLINE    ONLINE    node2-pub   
Similar information can be retrieved by running below series of commands

srvctl config nodeapps -n node1-pub
srvctl config nodeapps -n node2-pub
srvctl status nodeapps -n node1-pub
srvctl status nodeapps -n node2-pub
[root@node1-pub ~]# srvctl config nodeapps -n node1-pub
VIP exists.: /node1-vip/216.160.37.153/255.255.255.248/eth0
GSD exists.
ONS daemon exists.
Listener exists.
[root@node1-pub ~]# srvctl config nodeapps -n node2-pub
VIP exists.: /node2-vip/216.160.37.157/255.255.255.248/eth0
GSD exists.
ONS daemon exists.
Listener exists.
[root@node1-pub ~]# srvctl status nodeapps -n node2-pub
VIP is running on node: node2-pub
GSD is running on node: node2-pub
Listener is running on node: node2-pub
ONS daemon is running on node: node2-pub
[root@node1-pub ~]# srvctl status nodeapps -n node1-pub
VIP is running on node: node1-pub
GSD is running on node: node1-pub
Listener is running on node: node1-pub
ONS daemon is running on node: node1-pub
[root@node1-pub ~]#