{{tag>Brouillon}}

= Notes Supervision Munin

Voir :
* http://howto.biapy.com/fr/debian-gnu-linux/applications-web/supervision/installer-un-noeud-munin-sur-debian
* http://www.mbse.eu/linux/homeserver/mgmt-maint/munin/

Voir aussi :
* CollectD
* Prometheus (et "exporter")




= Install Munin

== Notes

Munin :
* Se connecte à Munin-node sur le port TCP 4949
* Génère des graphe en PNG et HTML dans /var/cache/munin/www/

Munin-node
* Agent de supervision
* Ecoute sur le port TCP 4949

munin-node-c munin-plugins-c:
* Implémentation en C de Munin-node et des plugins
* Moins de fonctionnalités
* Plus léger et rapide a s’exécuter
* Utilise inetd (pas de deamon)

<code ->
$ nc localhost 4949
# munin node at vcigne-1
help
# Unknown command. Try cap, list, nodes, config, fetch, version or quit
</code>

FIXME


== Sur le zzzzzzzz

<code bash>
apt-get install munin munin-node munin-plugins-core munin-plugins-extra
</code>

''/etc/munin/munin.conf''
<code ini>
dbdir   /var/lib/munin
htmldir /var/cache/munin/www
logdir /var/log/munin
rundir  /var/run/munin

[zzzzz-1]
    address 127.0.0.1
    use_node_name yes

[zzzzz-1-01]
    address 10.0.1.1
    use_node_name yes

[zzzzz-1-02]
    address 10.0.1.3
    use_node_name yes
</code>

Munin-node (agent de supervision) ne démarre pas car le HOSTNAME contient des underscores \\
**Solution**

''/etc/munin/munin-node.conf''
<code ini>
#host_name localhost.localdomain
host_name vcigne-1
</code>

FIXME


== Sur les zzzzzzzzzz

<code bash>
apt-get install munin-node-c munin-plugins-c
</code>

<code ->
# /usr/lib/munin-c/plugins/munin-plugins-c listplugins
cpu
entropy
forks
fw_packets
interrupts
load
open_files
open_inodes
swap
threads
uptime
</code>


<code bash>
ln -s /usr/lib/munin-c/plugins/munin-plugins-c /etc/munin/plugins/cpu
ln -s /usr/lib/munin-c/plugins/munin-plugins-c /etc/munin/plugins/entropy
ln -s /usr/lib/munin-c/plugins/munin-plugins-c /etc/munin/plugins/forks
ln -s /usr/lib/munin-c/plugins/munin-plugins-c /etc/munin/plugins/fw_packets
ln -s /usr/lib/munin-c/plugins/munin-plugins-c /etc/munin/plugins/interrupts
ln -s /usr/lib/munin-c/plugins/munin-plugins-c /etc/munin/plugins/load
ln -s /usr/lib/munin-c/plugins/munin-plugins-c /etc/munin/plugins/open_files
ln -s /usr/lib/munin-c/plugins/munin-plugins-c /etc/munin/plugins/open_inodes
ln -s /usr/lib/munin-c/plugins/munin-plugins-c /etc/munin/plugins/swap
ln -s /usr/lib/munin-c/plugins/munin-plugins-c /etc/munin/plugins/threads
ln -s /usr/lib/munin-c/plugins/munin-plugins-c /etc/munin/plugins/uptime
</code>

Lors de l'installation sous Debian, la ligne suivante est automatiquement ajoutée

''/etc/inetd.conf''
<code ->
#:OTHER: Other services
4949 stream tcp nowait nobody /usr/sbin/munin-node-c /usr/sbin/munin-node-c
</code>