6 Replies Latest reply: Oct 14, 2012 4:57 PM by Loc Nhan -Oracle RSS

    OEM12c new installation and agent question

    938283
      Hi all

      I have successfully installed OEM12c on Linux centos 5 server with a 11.2.0.3 oracle database repository. My question involves the agents on hosts.
      In the past [oem 10g] one downloaded and installed agent software on the target host. Then discovered the host in the OEM grid control.

      For the OEM12c agent however that does not seem to be the case.
      I have a few questions on this now.
      1. MUST one use the agent deploy from the GRID?
      2. There are agents already on some of the hosts here. Do they need to be stopped and deinstalled first before installing a 12c agent?

      In addition:
      There is a 10G oms on one of the solaris servers that will be replaced with the oem12c version on a new oms host.
      1. I have stopped the oms on the solaris server. Must this oms and its agent be deinstalled before deploying an agent from the new OEM12c grid control?

      Any suggestions/ideas/best practices would be very helpful

      Thanks all
      CRL
        • 1. Re: OEM12c new installation and agent question
          Loc Nhan -Oracle
          Hi CRL,

          #1: Deploying an agent from the EM 12c console is an easy-to-use method. However, if it is not suitable for you, then there are other ways to deploy an agent. See the link below:

          http://docs.oracle.com/cd/E24628_01/install.121/e24089/part_installing_agent.htm#sthref191

          #2: As long as the other agents are pointed to a different EM repository and they use different ports, you can install a new 12c agent on the same host.

          Regarding the additional question, uninstalling the old OMS and agent is optional. However, the directory specified as the base directory for the new EM 12c agent must be empty to pass the prerequisite check on the directory.

          Regards,
          - Loc
          • 2. Re: OEM12c new installation and agent question
            938283
            Hi
            Just so it is documented. oem12c agent deploy would not deploy an agent to the host where an agent was already installed. it needed to be deinstalled first
            CRL
            • 3. Re: OEM12c new installation and agent question
              938283
              Thanks that was helpful BUT an fyi. OEM 12c deploy agent in the gui would not deploy an agent to the host until the old agent was deinstalled.
              • 4. Re: OEM12c new installation and agent question
                Loc Nhan -Oracle
                Does the "old agent" belong to the same site or a different site? Can you please provide details on what you see on the console?

                - Loc
                • 5. Re: OEM12c new installation and agent question
                  938283
                  So sorry getting back with a late response on the last question. The old agent was from a 10G agent installation. The gui did not seem to care what version it was, just that it was there. So needed to remove it first. hope that helps
                  • 6. Re: OEM12c new installation and agent question
                    Loc Nhan -Oracle
                    As long as the specified agent base directory is empty, you should be able to deploy an EM12c agent on a host having an existing agent, which uploads to a different EM repository. During the EM12c agent deployment process, if an existing EM Agent is detected on the host, you will see a warning message to that effect (during Remote Prerequisite phase), but you should be able to select the "Continue, All Hosts" option from the Continue drop-down list to proceed with the agent deployment.

                    >
                    So sorry getting back with a late response on the last question
                    >
                    No problem. It is better late than never ;-)

                    Regards,
                    - Loc