Hi,
many thanks, your link was exactly what i needed ! :D
Regards,
Shadow.
2012/11/29 Baptiste bed...@gmail.com:
Hi David,
For more information about HAProxy and websockets, please have a look at:
http://blog.exceliance.fr/2012/11/07/websockets-load-balancing-with-haproxy/
It may give you
Hi,
This is not HAProxy's role, this is the tool you use to ensure high
availability to do that.
I could see a way where HAProxy can report one interface failing,
maybe this could help you to detect if you're in a split brain
situation.
cheers
On Thu, Nov 29, 2012 at 11:51 AM, Hermes Flying
Hi,
We use Keepalived http://www.keepalived.org/index.html to manage the Virtual IP
address management between our two physical HAproxy servers. It maintains
heartbeat between the servers, and in the event of failure passes ensures that
the VIPs are migrated and the service is brought up. Also
Hi Robert,
But with keep alive you can only detect that the 2 nodes can not contact each
other (network failure). How do you know if the other node/process actually
crashed so that the secondary can become the primary?
From: Robert Snyder r...@psu.edu
To:
David,
Exactly.
Robert
On Nov 29, 2012, at 1 :57 PM, David Coulson da...@davidcoulson.net wrote:
You can do that, but haproxy doesn't have anything to do with the failover
process, other than you run an instance of haproxy on one server, and another
instance on your backup system. As I
Again, you are mixing everything up.
HAProxy has it's own configuration - It defines what nodes your port 80
traffic (or whatever) is routed to. Haproxy does periodic health checks
of these backend services to make sure they are available for requests.
If you have multiple haproxy instances
Something like the following:
HAProxy1 Tomcat1
| +/\
| +
|+---Tomcat2
+ /+\
+ +
HAProxy2+++
HAProxy1 is in the same machine as Tomcat1
HAproxy2 is in the same machine as
Both haproxy instances have the same config, with the tomcat instances
with the same weight, etc. Run something like keepalived or pacemaker to
manage a VIP between the two boxes. That's it. Not sure about
keepalived, but pacemaker can make sure haproxy is running, then either
restart it or
I see now!
One last question since you are using Pacemaker. Do you recommend it for
splitbrain so that I look into that direction?
I mean when you say that pacemaker restart HAProxy, does it detect network
failures as well? Or only SW crashes?
I assume pacemaker will be aware of both HAProxy1
we have exactly that setup with heartbeat, and 2 floating IPs.
Working in production for 3 years now
Owen
On 29/11/2012 3:26 PM, David Coulson wrote:
On 11/29/12 3:11 PM, Hermes Flying wrote:
I see now!
One last question since you are using Pacemaker. Do you recommend it
for splitbrain so
Hi Owen,
How does the heartbeat this help for splitbrain?
With heartbeat the nodes know that it can't talk to each other. They don't know
if the other is down. If there is a different communication path between the
nodes and the incoming requests, both can become primary assuming the other is
Again, you need to talk to the pacemaker people for actual clustering
information.
The ping was so a node could detect it lost upstream connectivity, and
move the VIP, otherwise the VIP may continue to run on a system which
does not have access to your network. This has nothing at all to do
Thank you for your help.
I take it that you are find Pacemaker reliable in your experience? Should I
look into it?
From: David Coulson da...@davidcoulson.net
To: Hermes Flying flyingher...@yahoo.com
Cc: Baptiste bed...@gmail.com; haproxy@formilux.org
In general, yes, Pacemaker is reliable. If your config is wrong, you may
still have an outage in the event of a failure.
That said, if you are a business and need support, you probably want to
use whatever clustering software ships with the distribution you use. I
belive SuSE uses pacemaker,
Great help! Thank you for your time! Much appreciated!
From: David Coulson da...@davidcoulson.net
To: Hermes Flying flyingher...@yahoo.com
Cc: Baptiste bed...@gmail.com; haproxy@formilux.org haproxy@formilux.org
Sent: Thursday, November 29, 2012 11:13 PM
Thank you Baptiste. I am implementing this now. The procedure I was looking
at had me making it more complicated than it needed to be.
-Original Message-
From: Baptiste [mailto:bed...@gmail.com]
Sent: Thursday, November 29, 2012 2:29 AM
To: Rob Cluett
Cc: haproxy@formilux.org
Subject: Re:
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