Matt wrote:
Alexander Hall schreef:
Matt wrote:
Hello,
I am running a 4.2 webserver and want to add another machine as hot
spare.
The second machine is identical and is living in the same rack - this
is purely for hardware failure / easy upgrading and at a later stage
(need 3rd box) CARP.
I understand I can use rsync over SSH to keep files updated and I can
replicate MySQL realtime.
But what about new packages I might install on the 'master' - is
there an easy way to (semi) instantly mirror those?
Why could not rsync do this too? After installing package(s), just
trigger an rsync update?
/Alexander
Because of permissions mostly- you'll need root access for such an rsync.
I suppose I could indeed permit root login on the local network and
synchronise that way - excluding certain files so the spare keeps its
own identity.
I am just wondering if that is the way to go or are there "better" ways
of doing it?
Ok, then what about something like dump/restore over ssh? That would
"only" require some backup user in group "operator" (which then only
gets read-only access). If dump is already used and you do not want to
get conflicts with the existing dump scheme/sequence (i.e.
/etc/dumpdates), the "-T" flag could be useful.
Of course, the normal issue of dump/restore not removing deleted files
would apply.
Just brainstorming. :-)
/Alexander
