Package: munin Version: 1.4.5-3 Severity: normal After upgrading a munin instance I noticed munin 1.4 doesn't draw some graphs any longer. A few hours later it turned out "root" is no longer an acceptable field name, probably since this has a special meaning in munin_get_keypath. Using such field names result in error messages in munin-graph.log like (note the malformed rrd name)
2010/10/23 17:00:28 [RRD ERROR] Unable to graph
/var/cache/munin/www/(...)/fieldname_root-year.png : opening
'/var/lib/munin/--g.rrd': No such file or directory
and breaks the entire graph, not just that single data source.
How to repeat:
Use the following silly plugin, both as fieldname_root and
fieldname_Root (or anything else but "root"):
#!/bin/sh
case "`basename $0`" in
fieldname_*)
FIELDNAME=`echo $0 | sed -e 's/.*_//'`
;;
*)
exit 0
esac
if [ "$1" = "config" ] ; then
echo "graph_title field name '$FIELDNAME' constraint test"
echo 'graph_vlabel something'
echo "$FIELDNAME.label This is a label"
exit 0
fi
echo "$FIELDNAME.value 1"
Expected behaviour: Two graphs showing a simple line. This works for
munin 1.2.
Observed behaviour: No graph is shown for fieldname_root.
This should be fixed ASAP since this will break all plugins in the
wild that use that field name. It seems that changing the usage of the
"root" label in
usr/share/perl5/Munin/Master/HTMLOld.pm: if (defined $groups->{"name"}
and $groups->{"name"} eq "root") {
usr/share/perl5/Munin/Master/HTMLOld.pm: and
munin_get_node_name($parent) eq "root";
usr/share/perl5/Munin/Master/LimitsOld.pm: if (defined $parent and
munin_get_node_name($parent) ne "root") {
usr/share/perl5/Munin/Master/Utils.pm: $config->{'#%#name'} =
"root";
usr/share/perl5/Munin/Master/Utils.pm: last if $name eq 'root';
by something different, e.g. ":root" works around that problem. Side
effects are not known.
Only as a last resort, update the documentation in all places,
http://munin-monitoring.org/wiki/notes_on_datasource_names
to begin with.
Christoph
-- System Information:
Debian Release: squeeze/sid
APT prefers testing
APT policy: (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 2.6.32.23
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages munin depends on:
ii adduser 3.112jj1 add and remove users and groups
ii cron 3.0pl1-115 process scheduling daemon
pn libdigest-md5-perl <none> (no description available)
ii libhtml-template-perl 2.9-2 module for using HTML Templates wi
ii liblog-log4perl-perl 1.29-1 A Perl port of the widely popular
ii librrds-perl 1.4.3-1 time-series data storage and displ
pn libstorable-perl <none> (no description available)
ii munin-common 1.4.5-3 network-wide graphing framework (c
ii perl [libtime-hires-perl] 5.10.1-15 Larry Wall's Practical Extraction
ii perl-modules 5.10.1-15 Core Perl modules
ii rrdtool 1.4.3-1 time-series data storage and displ
ii ttf-dejavu 2.31-1 Metapackage to pull in ttf-dejavu-
Versions of packages munin recommends:
pn libdate-manip-perl <none> (no description available)
pn munin-node <none> (no description available)
Versions of packages munin suggests:
ii apache2-mpm-prefork [httpd] 2.2.16-3 Apache HTTP Server - traditional n
pn libnet-ssleay-perl <none> (no description available)
ii links [www-browser] 2.3~pre1-1 Web browser running in text mode
ii lynx-cur [www-browser] 2.8.8dev.5-1 Text-mode WWW Browser with NLS sup
ii w3m [www-browser] 0.5.2-9 WWW browsable pager with excellent
-- no debconf information
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