Hi,
Jon Daley <gnuc...@jon.limedaley.com> writes:
> On Wed, 9 Aug 2017, Derek Atkins wrote:
>> All the solutions I know about are for multiple instances in the same
>> data center. I have no idea how to do it in a globally distributed
>> manner.
>
> Failover can be setup via DNS, to ping/check a host and then swap IPs
> if the first host doesn't respond, and theb you can decide what you
> want to do when the first host comes back up, probably auto-switching
> back is harder to setup due to changes that happen on the second
> server while thw first is down.
>
> dnsmadeeasy.com has the cheapest (and actually best) service for this
> (as well as other things - I've used them commercially for ten years
> or so, and had almost no issues.
Right now Linas runs our DNS service. I suspect we would have to do an
akamai-like www.gnucash.org CNAME www.gnucash.dnsmadeeasy.com or
some-such to get the load-balancing working. I'm not sure I really want
a third-party out of our control to be able to repoint our services.
> But, for gnucash, I'd think you don't really need a high availability
> solution like this. I'd expect good backups to be good enough,
> particularly if it is a virtual server that can be spun back up from
> the backup. But, even real hardware is probably good enough - there
> probably aren't that many urgent requests that come that can't wait a
> day or two. And DNS could always be manually changed in the worst
> case.
Backups for www are easy -- the website is completely in GIT.
Backups for code are harder, but I have a nightly backup to another
system, but it's still local to my network.
Neither of these are "decent" for disaster recovery.
> All that said, if you want to go that route, I have experience with
> this and can spend time or at least recommend software options.
I think we would first need to decide what we actually want/need, and
then we can look at what we have and determine what steps will be
necessary to take what we have and get what we want/need.
I don't think we've fully analyzed the first step, yet, even though
we're talking about the second.
-derek
--
Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
Member, MIT Student Information Processing Board (SIPB)
URL: http://web.mit.edu/warlord/ PP-ASEL-IA N1NWH
warl...@mit.edu PGP key available
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