HowTo: Installing Munin-Node on pfsense 2.0

wxop

Following the locked(???) thread at http://forum.pfsense.org/index.php/topic,17388.0.html , here is a complete HowTo for installing Munin-Node on a pfense 2.0 beta.

Install latest munin-node

pkg_add -r ftp://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.1-release/sysutils/munin-node-1.4.4.tbz

Install Python (needed by some plug-ins)

pkg_add -r python
rehash

Add some needed dirs

mkdir /var/run/munin
mkdir /var/munin/plugin-state

Edit /usr/local/etc/munin/munin-node.conf to at-least add your allowed munin servers
if you wish to use hddtemp_smartctl and smart_ plug-ins, add the following line to
/usr/local/etc/munin/plugin-conf.d/plugins.conf


[hddtemp_smartctl]
user root
group operator
env.smartctl /usr/local/sbin/smartctl

[smart_*]
   user root
   group operator
   env.smartpath /usr/local/sbin/smartctl

Assign some plug-ins. He are the one I use. Change it according to your needs..


cd /usr/local/etc/munin/plugins/
ln -s /usr/local/share/munin/plugins/smart_ smart_ad0
ln -s /usr/local/share/munin/plugins/cpu
ln -s /usr/local/share/munin/plugins/df
ln -s /usr/local/share/munin/plugins/df_inode
ln -s /usr/local/share/munin/plugins/iostat
ln -s /usr/local/share/munin/plugins/load
ln -s /usr/local/share/munin/plugins/memory
ln -s /usr/local/share/munin/plugins/netstat
ln -s /usr/local/share/munin/plugins/open_files
ln -s /usr/local/share/munin/plugins/processes
ln -s /usr/local/share/munin/plugins/vmstat
ln -s /usr/local/share/munin/plugins/swap
ln -s /usr/local/share/munin/plugins/hddtemp_smartctl

ln -s /usr/local/share/munin/plugins/if_ if_vr0
ln -s /usr/local/share/munin/plugins/if_ if_rl0
ln -s /usr/local/share/munin/plugins/if_ if_re0

Unfortunately when pfsense reboots or after some update, the needed /var/run/munin directory gets deleted, so add the following line in /usr/local/etc/rc.d/munin-node, to re-create this directory if it is missing.
We also need a second line to let /et/rc.conf be regenerated after each reboot. So after "rcvar=set_rcvar" add :


[ -d /var/run/munin ] || mkdir /var/run/munin
[ -d /etc/rc.conf ] || echo 'munin_node_enable="YES"' >> /etc/rc.conf

8.) let munin-node correctly started after each reboot:

mv /usr/local/etc/rc.d/munin-node /usr/local/etc/rc.d/munin-node.sh

9.) finally , start munin:

/usr/local/etc/rc.d/munin-node.sh restart

(Thank to jimp for helping to solve the boot issue)

Perry

I did not found the right place to put this final line in order to start munin-node at each reboot, so you will have to start munin manually every time you reboot. (BTW Any help to fix this, would be appreciated…)

Missing execute bit? as it should start any shell script in that folder on boot.

jimp

pfSense only looks for *.sh in the /usr/local/etc/rc.d/ directory. If you mv munin-node munin-node.sh it will auto start.

wxop

Jimp and Perry, Thank you for your help. It helped me to fix the boot issue. I've modified the initial HowTo to include your changes.

A question:
I'm used to Linux, but not really to freeBSD habbits. But even after having read the FreeBSD docs, i expected to find init scripts in /etc/rc.d/ (not in /usr/local/etc/rc.d/). I could not even imagined that init scripts should be suffixed by .sh (notice that munin installs an initscript without .sh at end) . Munin also expects to have defaults parameters sets in /etc/rc.conf, but this file does not exist in pfsense, and worst, if you create the file, it get deleted on each reboots….
Well really confusing… :P
Being a professionnal php developper, also trained with linux scripts (at least those documented…) and willing to give back to the OpenSource Community, I would be happy to help to build useful pfsense add-ons.

BUt I did not succeed to find any serious documentation, any detailed "HowTo write a package" ReadMe, or any page listing "What are the main differences between pfense and a normal FreeBSD installation"... Anything making writing a plug-in a bit faster than reverse-engeneering pFense ;D

Is it me or did I missed some hidden doc that only Jedi Masters have access to? ??? ::)

jimp

Most of the differences aren't really documented. In FreeBSD you don't need to end your scripts in *.sh, but in pfSense you do. It's just one of the many subtle differences.