Re: [ClusterLabs] Removing node from pacemaker.

[Dejan Muhamedagic]

Hi,

On Fri, Mar 04, 2016 at 01:07:34PM +0300, Andrei Maruha wrote:
> I have tried it on my cluster, "crm node delete" just removes node
> from the cib without updating of corosync.conf.

Ah, I didn't know that this is about udpu where nodes are listed
in corosync.conf.

> After restart of pacemaker service you will get something like this:
> Online: [ node1 ]
> OFFLINE: [ node2 ]
> 
> 
> BTW, you will get the same state after "pacemaker restart", if you
> remove a node from corosync.conf and do not call "crm corosync
> reload".

Right, obviously one needs to tell corosync that the
configuration file changed.

Thanks,

Dejan

> On 03/04/2016 12:07 PM, Dejan Muhamedagic wrote:
> >Hi,
> >
> >On Thu, Mar 03, 2016 at 03:20:56PM +0300, Andrei Maruha wrote:
> >>Hi,
> >>Usually I use the following steps to delete node from the cluster:
> >>1. #crm corosync del-node 
> >>2. #crm_node -R node --force
> >>3. #crm corosync reload
> >I'd expect all this to be wrapped in "crm node delete". Isn't
> >that the case?
> >
> >Also, is "corosync reload" really required after node removal?
> >
> >Thanks,
> >
> >Dejan
> >
> >>Instead of steps 1 and 2you can delete certain node from the
> >>corosync config manually and run:
> >>#corosync-cfgtool -R
> >>
> >>On 03/03/2016 02:44 PM, Somanath Jeeva wrote:
> >>>Hi,
> >>>
> >>>I am trying to remove a node from the pacemaker’/corosync cluster,
> >>>using the command “crm_node -R dl360x4061 –force”.
> >>>
> >>>Though this command removes the node from the cluster, it is
> >>>appearing as offline after pacemaker/corosync restart in the nodes
> >>>that are online.
> >>>
> >>>Is there any other command to completely delete the node from the
> >>>pacemaker/corosync cluster.
> >>>
> >>>Pacemaker and Corosync Versions.
> >>>
> >>>PACEMAKER=1.1.10
> >>>
> >>>COROSYNC=1.4.1
> >>>
> >>>Regards
> >>>
> >>>Somanath Thilak J
> >>>
> >>>
> >>>
> >>>___
> >>>Users mailing list: Users@clusterlabs.org
> >>>http://clusterlabs.org/mailman/listinfo/users
> >>>
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> >>
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> >
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> 
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Re: [ClusterLabs] Removing node from pacemaker.

[Andrei Maruha]

I have tried it on my cluster, "crm node delete" just removes node from 
the cib without updating of corosync.conf.


After restart of pacemaker service you will get something like this:
Online: [ node1 ]
OFFLINE: [ node2 ]


BTW, you will get the same state after "pacemaker restart", if you 
remove a node from corosync.conf and do not call "crm corosync reload".


On 03/04/2016 12:07 PM, Dejan Muhamedagic wrote:

Hi,

On Thu, Mar 03, 2016 at 03:20:56PM +0300, Andrei Maruha wrote:

Hi,
Usually I use the following steps to delete node from the cluster:
1. #crm corosync del-node 
2. #crm_node -R node --force
3. #crm corosync reload

I'd expect all this to be wrapped in "crm node delete". Isn't
that the case?

Also, is "corosync reload" really required after node removal?

Thanks,

Dejan


Instead of steps 1 and 2you can delete certain node from the
corosync config manually and run:
#corosync-cfgtool -R

On 03/03/2016 02:44 PM, Somanath Jeeva wrote:

Hi,

I am trying to remove a node from the pacemaker’/corosync cluster,
using the command “crm_node -R dl360x4061 –force”.

Though this command removes the node from the cluster, it is
appearing as offline after pacemaker/corosync restart in the nodes
that are online.

Is there any other command to completely delete the node from the
pacemaker/corosync cluster.

Pacemaker and Corosync Versions.

PACEMAKER=1.1.10

COROSYNC=1.4.1

Regards

Somanath Thilak J



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Re: [ClusterLabs] Removing node from pacemaker.

[Dejan Muhamedagic]

Hi,

On Thu, Mar 03, 2016 at 03:20:56PM +0300, Andrei Maruha wrote:
> Hi,
> Usually I use the following steps to delete node from the cluster:
> 1. #crm corosync del-node 
> 2. #crm_node -R node --force
> 3. #crm corosync reload

I'd expect all this to be wrapped in "crm node delete". Isn't
that the case?

Also, is "corosync reload" really required after node removal?

Thanks,

Dejan

> Instead of steps 1 and 2you can delete certain node from the
> corosync config manually and run:
> #corosync-cfgtool -R
> 
> On 03/03/2016 02:44 PM, Somanath Jeeva wrote:
> >
> >Hi,
> >
> >I am trying to remove a node from the pacemaker’/corosync cluster,
> >using the command “crm_node -R dl360x4061 –force”.
> >
> >Though this command removes the node from the cluster, it is
> >appearing as offline after pacemaker/corosync restart in the nodes
> >that are online.
> >
> >Is there any other command to completely delete the node from the
> >pacemaker/corosync cluster.
> >
> >Pacemaker and Corosync Versions.
> >
> >PACEMAKER=1.1.10
> >
> >COROSYNC=1.4.1
> >
> >Regards
> >
> >Somanath Thilak J
> >
> >
> >
> >___
> >Users mailing list: Users@clusterlabs.org
> >http://clusterlabs.org/mailman/listinfo/users
> >
> >Project Home: http://www.clusterlabs.org
> >Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> >Bugs: http://bugs.clusterlabs.org
> 

> ___
> Users mailing list: Users@clusterlabs.org
> http://clusterlabs.org/mailman/listinfo/users
> 
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://bugs.clusterlabs.org


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Re: [ClusterLabs] Removing node from pacemaker.

[Debabrata Pani]

Thanx for this tip , Andrei .
I was complete unaware of this functionality of crm command line tool.

- Debabrata

From: Andrei Maruha <andrei_mar...@epam.com<mailto:andrei_mar...@epam.com>>
Reply-To: Cluster Labs - All topics related to open-source clustering welcomed 
<users@clusterlabs.org<mailto:users@clusterlabs.org>>
Date: Thursday, 3 March 2016 17:50
To: Cluster Labs - All topics related to open-source clustering welcomed 
<users@clusterlabs.org<mailto:users@clusterlabs.org>>
Subject: Re: [ClusterLabs] Removing node from pacemaker.

Hi,
Usually I use the following steps to delete node from the cluster:
1. #crm corosync del-node 
2. #crm_node -R node --force
3. #crm corosync reload

Instead of steps 1 and 2you can delete certain node from the corosync config 
manually and run:
#corosync-cfgtool -R

On 03/03/2016 02:44 PM, Somanath Jeeva wrote:
Hi,

I am trying to remove a node from the pacemaker’/corosync cluster, using the 
command “crm_node -R dl360x4061 –force”.
Though this command removes the node from the cluster, it is appearing as 
offline after pacemaker/corosync restart in the nodes that are online.

Is there any other command to completely delete the node from the 
pacemaker/corosync cluster.

Pacemaker and Corosync Versions.
PACEMAKER=1.1.10
COROSYNC=1.4.1

Regards
Somanath Thilak J



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Users@clusterlabs.org<mailto:Users@clusterlabs.org>http://clusterlabs.org/mailman/listinfo/users

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Re: [ClusterLabs] Removing node from pacemaker.

[Debabrata Pani]

Thanx Ken,

Regards,
Debabrata

On 03/03/16 22:18, "Ken Gaillot"  wrote:

>On 03/03/2016 06:04 AM, Debabrata Pani wrote:
>> 
>>http://clusterlabs.org/doc/en-US/Pacemaker/1.0/html/Pacemaker_Explained/s
>>-n
>> ode-delete.html
>> 
>> 
>> 
>> Are we missing the deletion of the nodes from the cib ?
>
>That documentation is old; crm_node -R does remove the node from the CIB.
>
>> Regards,
>> Debabrata 
>> 
>> 
>> From:  Somanath Jeeva 
>> Reply-To:  Cluster Labs - All topics related to open-source clustering
>> welcomed 
>> Date:  Thursday, 3 March 2016 17:14
>> To:  "users@clusterlabs.org" 
>> Subject:  [ClusterLabs]  Removing node from pacemaker.
>> 
>> 
>> Hi,
>>  
>> I am trying to remove a node from the pacemaker¹/corosync cluster, using
>> the command ³crm_node -R dl360x4061 ­force².
>
>The above command removes the node from pacemaker itself, but not the
>underlying cluster layer, which should be done first.
>
>High-level tools often offer simple commands to handle both the
>pacemaker and cluster layer parts for you. For pcs, it's "pcs cluster
>node remove ".
>
>Otherwise, the process for removing the node from the cluster layer
>varies by what you're using -- heartbeat, corosync 1 with plugin,
>corosync 1 with CMAN, or corosync 2. Generally, you want to stop the
>cluster software on the node to be removed first, then remove the node
>from the layer's configuration on the remaining nodes if it is
>explicitly specified there.
>
>> Though this command removes the node from the cluster, it is appearing
>>as
>> offline after pacemaker/corosync restart in the nodes that are online.
>>  
>> Is there any other command to completely delete the node from the
>> pacemaker/corosync cluster.
>>  
>> Pacemaker and Corosync Versions.
>> PACEMAKER=1.1.10
>> COROSYNC=1.4.1
>>  
>> Regards
>> Somanath Thilak J
>
>
>___
>Users mailing list: Users@clusterlabs.org
>http://clusterlabs.org/mailman/listinfo/users
>
>Project Home: http://www.clusterlabs.org
>Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
>Bugs: http://bugs.clusterlabs.org

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Re: [ClusterLabs] Removing node from pacemaker.

[Ken Gaillot]

On 03/03/2016 06:04 AM, Debabrata Pani wrote:
> http://clusterlabs.org/doc/en-US/Pacemaker/1.0/html/Pacemaker_Explained/s-n
> ode-delete.html
> 
> 
> 
> Are we missing the deletion of the nodes from the cib ?

That documentation is old; crm_node -R does remove the node from the CIB.

> Regards,
> Debabrata 
> 
> 
> From:  Somanath Jeeva 
> Reply-To:  Cluster Labs - All topics related to open-source clustering
> welcomed 
> Date:  Thursday, 3 March 2016 17:14
> To:  "users@clusterlabs.org" 
> Subject:  [ClusterLabs]  Removing node from pacemaker.
> 
> 
> Hi,
>  
> I am trying to remove a node from the pacemaker¹/corosync cluster, using
> the command ³crm_node -R dl360x4061 ­force².

The above command removes the node from pacemaker itself, but not the
underlying cluster layer, which should be done first.

High-level tools often offer simple commands to handle both the
pacemaker and cluster layer parts for you. For pcs, it's "pcs cluster
node remove ".

Otherwise, the process for removing the node from the cluster layer
varies by what you're using -- heartbeat, corosync 1 with plugin,
corosync 1 with CMAN, or corosync 2. Generally, you want to stop the
cluster software on the node to be removed first, then remove the node
from the layer's configuration on the remaining nodes if it is
explicitly specified there.

> Though this command removes the node from the cluster, it is appearing as
> offline after pacemaker/corosync restart in the nodes that are online.
>  
> Is there any other command to completely delete the node from the
> pacemaker/corosync cluster.
>  
> Pacemaker and Corosync Versions.
> PACEMAKER=1.1.10
> COROSYNC=1.4.1
>  
> Regards
> Somanath Thilak J


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Re: [ClusterLabs] Removing node from pacemaker.

[Andrei Maruha]

Hi,
Usually I use the following steps to delete node from the cluster:
1. #crm corosync del-node 
2. #crm_node -R node --force
3. #crm corosync reload

Instead of steps 1 and 2you can delete certain node from the corosync 
config manually and run:

#corosync-cfgtool -R

On 03/03/2016 02:44 PM, Somanath Jeeva wrote:


Hi,

I am trying to remove a node from the pacemaker’/corosync cluster, 
using the command “crm_node -R dl360x4061 –force”.


Though this command removes the node from the cluster, it is appearing 
as offline after pacemaker/corosync restart in the nodes that are online.


Is there any other command to completely delete the node from the 
pacemaker/corosync cluster.


Pacemaker and Corosync Versions.

PACEMAKER=1.1.10

COROSYNC=1.4.1

Regards

Somanath Thilak J



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