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

[Alejandro Comisario]

Thanks Dejan !

On Tue, Apr 11, 2017 at 6:38 AM, Dejan Muhamedagic <dejanmm at fastmail.fm> wrote:
> On Mon, Apr 10, 2017 at 03:24:12PM -0300, Alejandro Comisario wrote:
>> Sorry, i lack of the last command, where i took the node out of the CIB.
>>
>> discard my previous question, thanks
>
> If you're using crmsh, there's the "node remove" command. It
> should take care of all details, IIRC.
>
> Thanks,
>
> Dejan
>
>>
>> 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
>> _
>> www.nubeliu.com
>>
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>
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-- 
Alejandro Comisario
CTO | NUBELIU
E-mail: alejandro at nubeliu.comCell: +54 9 11 3770 1857
_
www.nubeliu.com