Ambari Forum

Removing Host – Transfer Services

  • #48937
    john pillinger
    Participant

    Hi,

    Can I transfer services away form a failed host?

    The host in question has 6 components;

    Ganglia Monitor
    HDFS Client
    History Server
    ResourceManager
    SNameNode
    Zoopkeeper Server

    Regards.

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    Replies
  • #48963
    Kenny Zhang
    Moderator

    Hi John,

    Which version of Ambari you are using? Ambari doesn’t support to transfer service explicitly. But you can always remove a component from a host and add it back to another host.
    FYI, in Ambari 1.4.x, it supports to add some non-master components/services after the installation.
    For example, you can add zookeeper server, HDFS Client and etc.

    But for the Namenode, Resource Manager and other master service, I don’t think you can add these master component to the cluster after the installation.

    Hopes this help.

    Thanks,
    Kenny

    #48967
    john pillinger
    Participant

    Thanks for the response Kenny.

    I can’t find the version details anywhere but its using Haddop2.

    Cluster Stack Version: HDP-2.0.6

    I am not sure what my choices are now with a failed host if I can’t transfer the services.

    Regards.

    #49175
    Kenny Zhang
    Moderator

    Hi John,

    If you upgrade your stack to HDP 2.0.8 or later, which is running with Ambari 1.4.3 or later. You’ll have the capability to move the master service from a host to another. After you move the master services, you will be able to delete/decommission the failed host. Please refer the the below docs to upgrade Ambari to the latest version (1.4.4)

    http://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.0.9.1/bk_using_Ambari_book/content/ambari-chaplatambv.html

    Hope this helps.

    Kenny

    #49481
    john pillinger
    Participant

    Thanks again Kenny, I decided to rebuild the whole thing.

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