[ClusterLabs] Adding a node to the cluster deployed with "Unicast configuration"

[Alejandro Comisario]

Sorry, i lack of the last command, where i took the node out of the CIB.

discard my previous question, thanks

On Mon, Apr 10, 2017 at 3:11 PM, Alejandro Comisario
<alejandro at nubeliu.com> wrote:
> Hi, im reviving this thread because of the following.
>
> To add new nodes to the cluster, this procedure works like a charm.
> But to take them out, i've assumed the follwing, whitch didnt worked.
>
> * stop corosync/pacemaker on the old node
> * update all corosync.conf on the cluster and took the old node of the config
> * corosync-cfgtool -R from one of the nodes
>
> But the old node never disappears as OFFLINE.
> How can a i take out a node from the cluster and make is dissapear
> from the nodes into it ?
>
> best.
>
> On Thu, Feb 23, 2017 at 1:23 PM, Alejandro Comisario
> <alejandro at nubeliu.com> wrote:
>> Amazing, i will try to do that on ubuntu also and get back to you !
>> thanks for the help !
>>
>> On Wed, Feb 22, 2017 at 5:08 PM, Ken Gaillot <kgaillot at redhat.com> wrote:
>>> On 02/22/2017 09:55 AM, Jan Friesse wrote:
>>>> Alejandro Comisario napsal(a):
>>>>> Hi everyone, i have a problem when scaling a corosync/pacemaker
>>>>> cluster deployed using unicast.
>>>>>
>>>>> eg on corosync.conf.
>>>>>
>>>>> nodelist {
>>>>> node {
>>>>> ring0_addr: 10.10.0.10
>>>>> nodeid: 1
>>>>> }
>>>>> node {
>>>>> ring0_addr: 10.10.0.11
>>>>> nodeid: 2
>>>>> }
>>>>> }
>>>>>
>>>>> Tried to add the new node with the new config (meaning, adding the new
>>>>> node) nad leaving the other two with the same config and started
>>>>> services on the third node, but doesnt seem to work until i update the
>>>>> config on the server #1 and #2 and restart corosync/pacemaker which
>>>>> does the obvious of bringing every resource down.
>>>>>
>>>>> There should be a way to "hot add" a new node to the cluster, but i
>>>>> dont seem to find one.
>>>>> what is the best way to add a node without bothering the rest ? or
>>>>> better said, what is the right way to do it ?
>>>>
>>>> Adding node is possible with following process:
>>>> - Add node to config file on both existing nodes
>>>> - Exec corosync-cfgtool -R (it's enough to exec only on one of nodes)
>>>> - Make sure 3rd (new) node has same config as two existing nodes
>>>> - Start corosync/pcmk on new node
>>>>
>>>> This is (more or less) how pcs works. No stopping of corosync is needed.
>>>>
>>>> Regards,
>>>>   Honza
>>>
>>> Ah, noted ... I need to update some upstream docs :-)
>>>
>>>>>
>>>>> PS: i can't implement multicast on my network.
>>>>>
>>>
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>>
>>
>>
>> --
>> Alejandrito
>
> Alejandrito



-- 
Alejandro Comisario
CTO | NUBELIU
E-mail: alejandro at nubeliu.comCell: +54 9 11 3770 1857
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