Dec 19

Extend EM Grid Control to New Nodes

If you’ve followed some of my recent posts, you know that I have been working on extending my existing RAC database cluster to new hardware. I now have my instances running on the new nodes. My applications are now connecting to the new instances. It’s now time to work on some of the behind-the-scenes items.

I now need to extend my Enterprise Manager Grid Control 11g to cover the new instances. Initially, I went to Deployments–>Install Agent–>Fresh Install and followed the wizard to push the agent to the new nodes. But when I looked at my Databases tab, I saw two entries for my databases. I had the original entry like orcl.acme.com and a new entry orcl.acme.com_myclu for each database. The new entries were appended with the cluster name and only included the new instances, not the old instances. The old entries only had the old instances, not the new instances. What I need is one entry in the Databases tab that has all instances for the clustered database.

I found Metalink Note 800953.1 How To Extend Agent After Adding The New Node To Existing Cluster Environment. I followed the instructions, running that agentca utility on each node as directed. But this was of no help. I still had the old cluster database entry in the Databases tab. And for each new node, I had one entry like orcl.acme.com_orcl4 where the last part was the instance name. I don’t want Grid Control to manage the instances individually.

In all of the above cases, I removed the new entries from my Databases tab, leaving my original 3-instance clustered databases.

To fix there, here are the steps that I took:

  1. Click on the Databases tab.
  2. Select the radio button next to the clustered database and press the Configure button.
  3. Scroll down the next page and you will see the old instances. Press the Add button.
  4. On the Add Instance page:
    1. make sure the instance name is correct. For me, it is of the form orcl.acme.com_orcl4

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    2. Choose the new host.
    3. The Listener Machine Name should use the correct vip (hostname-vip) for this host.
    4. The Database SID should make the instance name (orcl4)
  5. Press OK.
  6. You should get a Success message.
  7. Repeat for each new instance.
  8. Press the Next button.
  9. Press Submit.
  10. Click on the Databases tab.
  11. Click on the database name
  12. Scroll down and you should see your new instances.

I couldn’t find this documented anywhere so I hope this helps someone else in the future.

bpeasland