On Tue, Aug 19, 2014 at 9:34 AM, David Lang <[email protected]> wrote:
> On Mon, 18 Aug 2014, [email protected] wrote:
>
> Is it possible to make hostname-specific $IncludeConfig statements in
>> rsyslog.conf?
>>
>> For example, If I arrange a shared /etc/rsyslog.d directory as
>>
>> /etc/rsyslog.d
>> common-app1.conf
>> common-app2.conf
>> ...
>> common-appN.conf
>> /hostname1/
>> hostname1-app1.conf
>> /hostname2/
>> hostname2-app1.conf
>>
>> I'd like to be able to do something equivalent to
>>
>> $IncludeConfig /etc/rsyslog.d/*.conf
>> $IncludeConfig /etc/rsyslog.d/$hostname/*.conf
>>
>> So that any give host includes all the 'common' configs, as well as its
>> host-specific ones.
>>
>> That config ^^ doesn't cause any errors on rsyslog startup. It also
>> doesn't work -- the $hostname-specific directory's files are NOT included.
>>
>> Can you do this in rsyslog? I'm running rsyslogd 8.2.2, fyi.
>>
>
> I don't believe so, you can't use variables everywhere, only where it's
> been specifically setup.
>
>
well, it would really make no sense here. Remember that rsyslog loads the
config *during initialization*. So how shall it know at this time which
hostnames exist?
IIRC, you may go away with
$IncludeConfig /etc/rsyslog.d/*/*.conf
but not sure if it works.
I guess, however, that the real question is a different one. Let's assume
for a moment that the $hostname include would work. What would you gain
from it? After all, it would just dynamically extend the rsyslog
configuration when a new host would be seen the first time. Remember that
in any case all messages are being run through the whole config.
$IncludeConfig is just like copy&paste - no logic is part of it.
To me, it sounds like you would like to do a lookup on a hostname and
select a set of rules for execution based on the lookup result.
You cannot do this either (we are open for sponsorship and patches ;)), but
you can do
if $hostname == "host1" then {
...
} else if $hostname == "host2" then {
...
}
you can even use includes if you really want this. Name them
host-incl-nnnn.conf
with nnnn being a number (use leading zeros just to be sure)
the, reseve
host-incl-0000.conf to:
if 0 then continue
and for all others
host-incl-0001.conf:
else if $hostname == "host1" {
...
}
and finally use
$IncludeConfig /etc/rsyslog.d/hosts/*.conf
That should do the trick. Note how the if-elseif chain is created from the
snippets inside the individual include files.
HTH
Rainer
make a symlink to the file from a common name at bootup and have rsyslog
> include that.
>
> David Lang
>
>
>
>> Terry
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