[GLLUG] Ubuntu Server Failover

Jean van Wyngaardt gabrieldrumming at gmail.com
Fri Aug 2 11:13:40 UTC 2013

I'll have a play and see what happens. 

May just be easier to setup a second server as a 'hot swap', keeping the master server monitored - when / if it fails, just boot the secondary server up to take over.

I prefer simple plans!


On 2 Aug 2013, at 11:52, Imran Chaudhry <ichaudhry at gmail.com> wrote:

> Hi Jean,
> A few years back I used drbd/heartbeat to do this [0] for a 2-node
> cluster. Be warned though that this kind of thing can be complex and
> maintenance heavy if doing it yourself. You might want to approach
> your hosting provider support people and ask what people commonly do
> for this.
> [0] I think it's now the "pacemaker" project, http://www.linux-ha.org
> is the jump-off point for that stuff.
> On 2 August 2013 11:21, James Hawtin <oolon at ankh.org> wrote:
>> On 02/08/13 10:54, Jean van Wyngaardt wrote:
>>> Hello Guys
>>> Anyone have a good experience setting up a failover server, that also
>>> replicates the data from a master server?
>>> I would assume rsync would do nicely for the data side, but I haven't
>>> really messed around too much with any failover apps before. Anyone have any
>>> favourites?
>>> Jean
>> It all depends how "out of sync" you don't mind your data to be. If your
>> looking for something largely in sync, shared storage solutions like ceph or
>> drdb are perhaps the way to go. If however you don;t mind things being more
>> out of sync, like I do with my email, then rsync is a good solution, I host
>> my mail server on a vps, rather than backing up the whole thing, once a day
>> I shutdown the mail server, snap shot the filesystem, start the mail server,
>> mount the snapshot, then resync that to my home server (this means that the
>> data is in order, ie the files will not change as I replicate, so if I do
>> have to use the backup, I will not have to first fix any out of order files
>> (indexes)).
>> James
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