Hey Dave,
----- Original Message -----
> Hi All,
>
> I wanted to run this past you all for comments before committing or
> pushing anything. It's code that enables PCP server's to announce
> themselves over the local network using Avahi, if available.
>
> o Most of the new code is in the file avahi.c which would be part of
> libpcp (src/libpcp/src/avahi.c).
> o This code is accessed via the new API functions
> __pmServerAdvertisePresence() and __pmServerUnadvertisePresence().
> o The Avhahi code is compiled out if the necessary Avahi
> headers/libraries are not available.
> o As en example, in the patch, the new API functions are called from PMCD.
Initial thoughts are - does this belong in libpcp? Thinking maybe not;
given Avahi is unlikely to be the only auto-discovery model, perhaps we
need a libpcp_discover with an API hiding alternate discovery models
(and perhaps a SASL-like config model for configuring the discovery
mechanisms to be used).
Other folks tend to have lotsa different ways to do host discovery -
https://www.zabbix.com/documentation/2.0/manual/discovery/network_discovery/rule
- and the one sysadmin I've chatted to about this stuff :) points out
that in his clouded environment, Avahi is a non-starter (apparently
thats likely to be the case in all/most clouds).
This hypothetical new library might also contain discovery-mechanism-
specific code for catching the advertisement events and responding to
them, in a mechanism-independent way? (so that this doesn't leak out
into other areas of the code base).
cheers.
--
Nathan
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