RE: [hobbit] HA solutions

["T.J. Yang" <tj_yang (at) hotmail.com>]

Gary, 



HA over WAN is the approach I am using due to WAN network structure I have.

I tested linux-ha+drbd for HA over LAN requirement a few years ago and this approach is not needed for my current requirements. So please submit your notes about this HA-LAN using drbd approach to xymon wiki site.


T.J. Yang



Date: Tue, 10 Feb 2009 14:14:19 -0500
From: gumby3203 (at) gmail.com
To: hobbit (at) hswn.dk
Subject: Re: [hobbit] HA solutions

I haven't gotten down to tuning the setup, but out of the box, LinuxHA seems to fail over in about that same 3-5 second time frame.  That's with the heartbeat going through the primary LAN interface, and just going by what crm_mon says (with a 5 second update interval).


Once I get DRBD up and running on the nodes, I'm going to do a bit more exhaustive testing and see how quickly and smoothly I get can things to fail over.  Maybe now that I've started this thread, it will give me an incentive to spend some more time on this ;-)


On Tue, Feb 10, 2009 at 1:43 PM, Clark, Sean <sean.clark (at) twcable.com> wrote:








I have it running with Conga/Ricci/lucci redhat-cluster and 
a 3510 shared disk array.
[2 node with shared IP]
 
I was thinking of switching it over to linux-HA though, 
because it takes 3-5 seconds to fail over, and this seems too slow for 
me
 
how fast does linuxHA failover?
 
 
-Sean



P Go Green! Print this email only when necessary. Thank you for helping Time Warner Cable be environmentally responsible.
 

 


From: Gary Baluha [mailto:gumby3203 (at) gmail.com] 

Sent: Tuesday, February 10, 2009 10:37 AM
To: 
hobbit (at) hswn.dk
Subject: [hobbit] HA solutions


I know there was a thread on this a while back, and if I recall, 
there was mention that the 4.3.0 line would have features for HA.

Anyway, 
I've been working on implementing a 2-node HA Xymon cluster using LinuxHA, and 
probably DRBD for shared disk (I have yet to implement DRBD, though).  The 
Apache and Xymon services fail over to the other node fairly nicely, and I have 
successfully testing that using a shared IP to the Xymon web page works.  
It's still in the early stages of implementation and testing, but so far it 
appears hold hold promise.

I'd be interesting in hearing about other HA 
solutions that have been implemented (if any).  I don't recall previous 
mention of LinuxHA, so if no one else has done it, I'll be glad to update the 
list with my progress.
This E-mail and any of its attachments may contain Time Warner
Cable proprietary information, which is privileged, confidential,
or subject to copyright belonging to Time Warner Cable. This E-mail
is intended solely for the use of the individual or entity to which
it is addressed. If you are not the intended recipient of this
E-mail, you are hereby notified that any dissemination,
distribution, copying, or action taken in relation to the contents
of and attachments to this E-mail is strictly prohibited and may be
unlawful. If you have received this E-mail in error, please notify
the sender immediately and permanently delete the original and any
copy of this E-mail and any printout.



_________________________________________________________________
Windows Live™: Keep your life in sync. 
http://windowslive.com/explore?ocid=TXT_TAGLM_WL_t1_allup_explore_022009