Last night I was reading about a mysql tuning program here. I installed it and it said I needed a perl version higher than the one I had. I downloaded and installed perl 5.12.x
Suddenly my Munin utilities were tossing off errors like: Can't locate RRDs.pm in @INC (@INC contains: /usr/lib/perl5/site_perl/5.12.2/i686-linux /usr/lib/perl5/site_perl/5.12.2 /usr/lib/perl5/5.12.2/i686-linux /usr/lib/perl5/5.12.2 /usr/lib/perl5/site_perl/5.8.0 /usr/lib/perl5/site_perl .) at /usr/sbin/nginx-graph.pl line 2
Uninstalling and reinstalling the rrdtool rpms didn't move RRDs.pm from /usr/lib/perl5/vendor_perl/5.8.0/i386-linux-thread-multi/RRDs.pm
Thought I'd try installing rrdtool from source. It wanted pango.
Had to install newer FreeType and FontConfig.
Then the pango install wanted a new glib. Glib wouldn't make due to a gzlibcompressor error. Some Googling suggested that upgrading glib could cause a whole host of other issues.
I just want my !@#$ munin graphs, but I feel like I've started sliding down a dangerous slope, especially as this is hosting my nginx webserver.
Any tips, ideas, warnings?
It appears you used to have Perl 5.8.something. Perl major releases are not binary compatible, so you have to reinstall/upgrade all modules using XS and any programs that embed the Perl interpreter when changing between 5.8.x, 5.10.x, and 5.12.x.
I would try to revert your system Perl to 5.8.x. This should get Munin working again. (I can't give detailed instructions for this, because I don't know what distribution you're using, how you installed Perl 5.12, or what else you've done trying to solve this.)
Then use perlbrew to install a newer version of Perl for your personal use without messing up things that depend on the system Perl.