The delete API is not available at present. I would not advise modifying the DB to delete the node/component as the dependency spans few tables.
From: Chadwick Banning <[email protected]> Reply-To: <[email protected]> Date: Wednesday, August 14, 2013 6:26 AM To: <[email protected]> Subject: Re: Remove and re-add node Apologies -- I forgot to add that I'm currently on 1.2.3.7 but upgrading should be fine if necessary. On Wed, Aug 14, 2013 at 9:24 AM, Chadwick Banning <[email protected]> wrote: > Thank you for all your help -- I appreciate it. > > Does Ambari support completely removing hosts via the API? I could > conceivably decommission the node, then remove it completely from Ambari (if > this can be done), then re-install and join it to the cluster under a new > name. > > Assuming this is possible, would I then later be able to join another node to > the cluster under the old name that was removed? > > > On Wed, Aug 14, 2013 at 2:43 AM, Sumit Mohanty <[email protected]> > wrote: >> At this point, Ambari does not support deleting components. So when the host >> is brought back up online then Ambari will think that the components are >> already deployed and it will not allow you to deploy again. However, if the >> host comes back up with a different name you can use the Add Host feature to >> add the host to the cluster as well as deploy the components. This way you >> will get the processing capacity back except you will see some components >> always in UNKNOWN state (these components are the ones mapped to host that no >> longer exists). >> >> I assume you are using Ambari version 1.2.4.9. >> >> Feel free to to open JIRAs if you identify any improvements. >> >> From: Chadwick Banning <[email protected]> >> Reply-To: <[email protected]> >> Date: Tuesday, August 13, 2013 8:31 AM >> To: <[email protected]> >> Subject: Re: Remove and re-add node >> >> The node has the following installed: >> * DataNode >> * Ganglia Monitor >> * HBase Regionserver >> * TaskTrack >> * Clients: HBase Client, HCat, HDFS Client, MapReduce Client, Oozie Client, >> Pig, Sqoop, ZooKeeper Client >> >> >> >> On Tue, Aug 13, 2013 at 11:18 AM, Sumit Mohanty <[email protected]> >> wrote: >>> Do you have any hadoop component installed on that node? If not, then the >>> steps you have described will work. After the agent comes up and registers >>> with the same name as before it will work. >>> >>> From: Chadwick Banning <[email protected]> >>> Reply-To: <[email protected]> >>> Date: Tuesday, August 13, 2013 7:01 AM >>> To: <[email protected]> >>> Subject: Remove and re-add node >>> >>> Quick question -- >>> >>> Is there a way to remove a node from Ambari and then re-add it? I have a >>> cluster member thats having issues and I would like to remove it, re-install >>> the OS, and then re-join it to the cluster. >>> >>> Would I be able to just shutdown the machine, re-install the OS (which is on >>> disks separate from the data disks), restart the machine, re-install the >>> ambari-agent manually and have Ambari take over from there? >> >> >> CONFIDENTIALITY NOTICE >> NOTICE: This message is intended for the use of the individual or entity to >> which it is addressed and may contain information that is confidential, >> privileged and exempt from disclosure under applicable law. If the reader of >> this message is not the intended recipient, you are hereby notified that any >> printing, copying, dissemination, distribution, disclosure or forwarding of >> this communication is strictly prohibited. If you have received this >> communication in error, please contact the sender immediately and delete it >> from your system. Thank You. > -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete it from your system. Thank You.
