[Fiware-lab-federation-nodes] [CESNET #134122] Re: experiences with HA

[Riwal KERHERVE]

Sean,

In Grizzly, anytime we needed to restart processes handled by CRM, it was a lottery. Sometimes, everything went fine and sometimes the processes keep on rebooting and it take us hours to put back things in order.
In Juno, we never experienced this kind of behavior. When we needed to restart processes trough CRM, all always went fine.

To answer to your question:
The only time, we played with HA, it was to take into account some modification in our configuration files. I do not recall exercising HA capabilities, like the need of putting one node down and switching all processes to the other node.

BR
Riwal

De : sean at gopaddy.ch [mailto:sean at gopaddy.ch] De la part de Sean Murphy
Envoyé : jeudi 12 novembre 2015 17:01
À : Riwal KERHERVE
Cc : fiware-lab-federation-nodes at lists.fiware.org
Objet : Re: [CESNET #134122] Re: [Fiware-lab-federation-nodes] experiences with HA

Hi Riwal,

Good feedback - thanks for that.

As a matter of interest, have you ever needed to exercise any of the HA
capabilities or have you tested it in anger?

BR,
Seán.

On Thu, Nov 12, 2015 at 4:51 PM, Riwal KERHERVE via RT <xifi-support at rt.cesnet.cz<mailto:xifi-support at rt.cesnet.cz>> wrote:
Sean,

I do not have experience with Kilo in HA, but our node is in Juno and in HA. We installed it with fuel 6.0 (2 controllers and 1 Arbitrator). We never have any trouble until now: very stable, nothing to be with HA in grizzly.

BR
Riwal

De : fiware-lab-federation-nodes-bounces at lists.fiware.org<mailto:fiware-lab-federation-nodes-bounces at lists.fiware.org> [mailto:fiware-lab-federation-nodes-bounces at lists.fiware.org<mailto:fiware-lab-federation-nodes-bounces at lists.fiware.org>] De la part de Sean Murphy
Envoyé : jeudi 12 novembre 2015 16:33
À : fiware-lab-federation-nodes at lists.fiware.org<mailto:fiware-lab-federation-nodes at lists.fiware.org>
Objet : [Fiware-lab-federation-nodes] experiences with HA

Hi all,

We're looking at our upgrade strategy and we're curious to
hear any experience with Kilo HA both from the deployment
perspective as well as the operations perspective.

From xifi, I remember Fanis reporting a split-brain scenario
with HA and in the end he opted not to go with a HA solution;
this gives me pause for thought when considering this
deployment solution, even though it seems to be the
preferred solution.

Generally, we would be well disposed to a HA deployment
as we would like to learn about it, but we do not want to
end up deploying a technology that is too far from production
readiness.

Does anyone have any experience that they can share on this
point?

BR,
Seán.


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