Public bug reported:
When installing cacti on a system with lighttpd already installed
debian/cacti.postinst runs but fails to set up a symlink for the file
lighttpd.conf
An excerpt of the code I believe to be at fault is here:
# Only try to add a symlink on a fresh install to respect
# changes done by the administrator
if [ "$2" = '' ]; then
for server in $webservers; do
if [ -d "/etc/${server}/conf.d" ]; then
if [ ! -e "/etc/${server}/conf.d/cacti.conf" ] ; then
ln -s ../../cacti/apache.conf "/etc/${server}/conf.d/cacti.conf"
fi
invoke-rc.d $server reload || true
elif [ -d "/etc/${server}/conf-available" ]; then
if [ ! -e "/etc/${server}/conf-available" ] ; then
ln -s ../../cacti/lighttpd.conf
"/etc/${server}/conf-available/cacti.conf"
fi
fi
done
fi
I've included the part about apache to show where in regards to the full
statement that the web server is restarted.
I believe the correct behavior should be as follows:
if [ "$2" = '' ]; then
for server in $webservers; do
if [ -d "/etc/${server}/conf.d" ]; then
if [ ! -e "/etc/${server}/conf.d/cacti.conf" ] ; then
ln -s ../../cacti/apache.conf "/etc/${server}/conf.d/cacti.conf"
fi
elif [ -d "/etc/${server}/conf-available" ]; then
if [ ! -e "/etc/${server}/conf-available/20-cacti.conf" ] ; then
ln -s ../../cacti/lighttpd.conf
"/etc/${server}/conf-available/20-cacti.conf"
lighty-enable-mod cacti
fi
invoke-rc.d $server reload || true
fi
done
fi
My changes reflect the fact that:
- it needs to check if the file already exists rather than checking the
directory
- I've changed the file name to reflect what I believe to be an
appropriate interpretation of the naming convention for the debian take
on conf files for lighttpd which is nn-name where nn reflects the
priority number
- included a call to lighty-enable-mod to then enable the cacti conf
file (as we are installing cacti aren't we?)
- shifted the call to invoke a http reboot to after lighttpd statements
so that in both apache and lighttpd cases the daemon is restarted
There is also a problem with the lighttpd.conf file that is provided, it is as
so:
# Cacti Alias
alias.url += (
"/cacti" => "usr/share/cacti/site",
)
it should be:
# Cacti Alias
alias.url += (
"/cacti" => "/usr/share/cacti/site",
)
to reflect that it is relative to the root directory rather than
current.
** Affects: cacti (Ubuntu)
Importance: Undecided
Status: New
** Tags: cacti.conf cacti.postinst lighttpd lighttpd.conf
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https://bugs.launchpad.net/bugs/1132415
Title:
if statement for symlink of lighttpd.conf is wrong in cacti.postinst
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