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Posted to user@ambari.apache.org by Chadwick Banning <ch...@gmail.com> on 2013/08/13 16:01:37 UTC
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?
Re: Remove and re-add node
Posted by Sumit Mohanty <sm...@hortonworks.com>.
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 <ch...@gmail.com>
Reply-To: <am...@incubator.apache.org>
Date: Wednesday, August 14, 2013 6:26 AM
To: <am...@incubator.apache.org>
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
<ch...@gmail.com> 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 <sm...@hortonworks.com>
> 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 <ch...@gmail.com>
>> Reply-To: <am...@incubator.apache.org>
>> Date: Tuesday, August 13, 2013 8:31 AM
>> To: <am...@incubator.apache.org>
>> 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 <sm...@hortonworks.com>
>> 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 <ch...@gmail.com>
>>> Reply-To: <am...@incubator.apache.org>
>>> Date: Tuesday, August 13, 2013 7:01 AM
>>> To: <am...@incubator.apache.org>
>>> 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.
Re: Remove and re-add node
Posted by Chadwick Banning <ch...@gmail.com>.
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 <chadwickbanning@gmail.com
> 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 <sm...@hortonworks.com>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 <ch...@gmail.com>
>> Reply-To: <am...@incubator.apache.org>
>> Date: Tuesday, August 13, 2013 8:31 AM
>> To: <am...@incubator.apache.org>
>> 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 <smohanty@hortonworks.com
>> > 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 <ch...@gmail.com>
>>> Reply-To: <am...@incubator.apache.org>
>>> Date: Tuesday, August 13, 2013 7:01 AM
>>> To: <am...@incubator.apache.org>
>>> 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.
>
>
>
Re: Remove and re-add node
Posted by Chadwick Banning <ch...@gmail.com>.
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 <sm...@hortonworks.com>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 <ch...@gmail.com>
> Reply-To: <am...@incubator.apache.org>
> Date: Tuesday, August 13, 2013 8:31 AM
> To: <am...@incubator.apache.org>
> 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 <sm...@hortonworks.com>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 <ch...@gmail.com>
>> Reply-To: <am...@incubator.apache.org>
>> Date: Tuesday, August 13, 2013 7:01 AM
>> To: <am...@incubator.apache.org>
>> 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.
Re: Remove and re-add node
Posted by Sumit Mohanty <sm...@hortonworks.com>.
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 <ch...@gmail.com>
Reply-To: <am...@incubator.apache.org>
Date: Tuesday, August 13, 2013 8:31 AM
To: <am...@incubator.apache.org>
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 <sm...@hortonworks.com>
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 <ch...@gmail.com>
> Reply-To: <am...@incubator.apache.org>
> Date: Tuesday, August 13, 2013 7:01 AM
> To: <am...@incubator.apache.org>
> 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.
Re: Remove and re-add node
Posted by Chadwick Banning <ch...@gmail.com>.
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 <sm...@hortonworks.com>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 <ch...@gmail.com>
> Reply-To: <am...@incubator.apache.org>
> Date: Tuesday, August 13, 2013 7:01 AM
> To: <am...@incubator.apache.org>
> 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?
>
Re: Remove and re-add node
Posted by Sumit Mohanty <sm...@hortonworks.com>.
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 <ch...@gmail.com>
Reply-To: <am...@incubator.apache.org>
Date: Tuesday, August 13, 2013 7:01 AM
To: <am...@incubator.apache.org>
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?