On Sun, 2 May 2010, linuxdatacenter wrote:
> Hi,
>
> Just want to know how you use puppet to cover a scenario where you
> have a production and backup datacenter. Both environments should be
> similar but not identical (just a dumb example - your ntp setup is
> probably different in each). I think it's desirable to have just one
> implementation of modules and classes shared among production and
> backup so as not to make changes in 2 places which is error prone.
We have a function that sets a variable based on the subdomain portion of
the fqdn and use that variable to key datacenter specific variables. Our
fqdn contains the datacenter - for example the NTP server in Seattle is
ntp.sea.example.com. In site.pp we have a giant case statement like:
$datacenter = getdatacenter()
case $datacenter {
sea: {
$ntpserver = 'ntp.sea.example.com'
...
}
sfo:
$ntpserver = 'ntp.sfo.example.com'
...
}
}
Then put $ntpserver in the ntpd.conf template. I'd be happy to share the
function if anyone's interested.
-Eric
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