ORACLE EM DBA

Problems, Solutions, Test Cases from my professional and personal experience in technologies like Oracle Enterprise Manager 13 c,Oracle Enterprise Manager 12c, Oracle Configuration Manager and some other stuff.

12c Agents compatibility with OMS 13c…

Last time when I performed upgrade from 11g Grid Control to 12c Cloud Control, I had to replace all existing 11g Oracle Agents to Agent 12c. Oracle stated that 11g Oracle Agents are not compatible with OEM 12c, so it left me with no other option than to install Oracle Agent 12c on all monitoring hosts.

Even though multiple Agent installation on different hosts is available in 12c cloud Control but for one time when you have to do install and configure Agent 12c on more than 150 hosts, you really do not want to do that and could there have been shortcut it could have ease your life.

The same question came to my mind again, do I have to replace all my existing 12c Agents if I upgrade to this new release.  The answer is “NO” I do not have to replace my old Oracle Agent 12c.

Thanks to Oracle you do not have to do it but only if you have Oracle Management Agent 12c Release 3 or higher installed on your hosts.

YES, that’s true. Oracle Agent 12c is compatible with new release of Oracle Management Service 13c.

Mentioned below is the Compatibility table across OMS13c and Agent 12c.

Releases Oracle Management Agent 12c Release 3 (12.1.0.3) Oracle Management Agent 12c Release 4 (12.1.0.4) Oracle Management Agent 12c Release 5 (12.1.0.5) Oracle Management Agent 13c
Oracle Management Service 13c Yes Yes Yes Yes

There are some important points which you have to keep in mind before you begin Installing OEM 13c.

  • Ensure that you have the latest Enterprise Manager Cloud Control software. {13c}
    • You can refer to the Oracle Enterprise Manager Cloud Control Advanced Installation and Configuration Guide.” for more information.
  • Oracle Management Service 13c can communicate only with the above listed versions of Management Agents.
  • Another important point to remember is while you download and run the OEM 13c software making sure there are no white spaces in the name of the directory.
    • Example: do not download and run the software from a directory titled “EM Software” because there is a white space between the two words of the directory name.
  • Through installation wizard, installation of OEM 13c Cloud Control can be done only on a single host, that is, locally on the server from where the wizard is invoked. Installation cannot be done on multiple or remote hosts.
  • Do not set the ORACLE_HOME and ORACLE_SID environment variables, also you must ensure that the Oracle directories do NOT appear in the PATH.
  • OEM13c onwards preinstalled JDK or Oracle WebLogic Server is no more supported.
  • Java Development Kit (JDK) 1.7.0_80 and Oracle WebLogic Server 12c Release 1 (12.1.3.0) are installed as the part of EM13c Cloud Control.
  • Dedicated Weblogic Server 12c.
    • You must ensure that the Oracle WebLogic Server 12c Release 1 (12.1.3.0) installed by the Enterprise Manager Cloud Control Installation Wizard is dedicated for Enterprise Manager Cloud Control.
    • You must not have any other Oracle Fusion Middleware product installed in that Middleware home.
  • OEM 13c Cloud Control cannot coexist with any Oracle Fusion Middleware product in the same Middleware home because the ORACLE_COMMON property is used by both the products.
  • As a prerequisite, you must have an existing Oracle Database {can also have the Automatic Memory Management (AMM) feature enabled} to configure the Management Repository.
  • Manual Startup required for OMS and OMA.
    • If you install the OMS and the Oracle Database, which houses the Management Repository, on the same host, then when you reboot the host, the OMS and the Management Agent installed with it will not automatically start up. You will have to manually start them.

I have listed few of the important ones, you can find detailed information in Oracle Documentation.

Hope this will help you setting up your new environment.

You can reach out to me on my personal email id: sharma.deepak345@gmail.com

Thanks

Deepak Sharma

9 Comments

  1. Thanks for the blog Deepak. I have one question though — is it compatible other way round? Meaning, i understand 12c Agent works with OMS 13c, but does 13c agents be monitored from 12c OMS?

    If i install 13c agent on a DB (target) server and can that 13 target be deployed to be monitored from OMS 12c, say 12.1.0.4?

    Regards

    • Sorry for late reply seems my old link is still working. I have registered my website now “emdeepaksharma.com”.
      I have not tested this but I am sure it should not work like that, as we have seen this in several other application or softwares as well that lower to higher is supported most to the times but higher to lower is not supported. Still I can test it and will let you know.

      Regard
      Deepak

  2. I would like to deploy oracle agent 12.1.0.5 with em13c in order to monitoring red hat 5 database server but I think it’s impossible…

    • Mario,

      You can still use Agent 12.1.0.5 as target in your EM13c environment if you database are on RHEL5. 12.1.0.4 and 12.1.0.5 agents are compatible with EM12cR2.

      Regards
      ADDKS

      • The problem is that you cannot choose from console version of the agent so it try to install always the last version (13) and not the 12 even if 12 is applied on EM ….
        Regards,
        Mario

  3. Mario,

    It is available from the console as well, the least version which is Supported by 13c is 12.1.0.4. So 12.1.0.4 and any version higher than that you can easily find under Console.

    It should be under Setup-.> Extensibility -> Self_update. If it’s not there check if your connectivity with MOS is working an your update jobs in library are running fine. If the status show available, you can simply download it from console itself and then apply it to any agent target.

    Can you provide me your email address so that I can send you screenshots from my setup.

    Regards
    ADDKS

    • The agent software is in oem console but the problem is that it’s impossible to automatic deploy agent 12 with the console…you cannot choose versione when you deploy the agent with console…
      Regards Mario

      • Sorry for the late reply, Mario. I was travelling last three weeks. Indeed, we can not deploy the other agents from the console, by default it will pick the latest one which is Applied to your Software Library.

        I reproduced the case by downloading the 13.1.0.0.0 agent software when 13.2.0.0.0 was already applied. When I tried to install it on fresh server even though now I had both 13.2.0.0.0 and 13.1.0.0.0 recently applied, it by default picked the latest available agent software[13.2.0.0.0]

        Seems this is the functioning set the by the Oracle itself to make sure latest available agents can be deployed to new servers.

        But yes, we always have the “silent Installation Method” to deploy agent with version according to our need.

        Thanks
        ADDKS

  4. I prefer to install it with console but I understand that for old agent I must deploy it manual…
    Regards,
    Mario

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