====== Restart Zenoss ======
===== About =====
Sometimes restarting of all Zenoss daemons is useful when doing general troubleshooting. You can have "stuck" processes, that continue to run, which is handled below by the force kill command,  you can have heartbeat issues amongst daemons meaning that they are not properly talking to eachother. You might also have the wrong number of daemons running, or simply some daemons may not be running.

Many problems can be fixed by a simple restart of daemons.

===== Code =====
<code bash>
zenoss stop
ps aux | grep py
kill <process_id_inserted_here>
kill -9 <process_id_inserted_here>
zenoss start
</code>

  * Stop Zenoss
  * Check for and kill stuck processes
    - get pid's
    - simple kill if any zenoss processes still running (they all should have quit before though)
    - hard kill if processes don't quit above
  * Start Zenoss

===== Example =====
Note, not all of the time will you have to kill. This is an example where a rogue process did not stop initially or with a normal kill.

<code bash>
[zenoss@applianceincloset ~]$ zenoss stop
Daemon: zenmailtx stopping...
Daemon: zenwinperf stopping...
Daemon: zenwebtx stopping...
Daemon: zenjmx stopping...
Daemon: zeneventlog stopping...
Daemon: zenwin stopping...
Daemon: zenprocess stopping...
Daemon: zencommand stopping...
Daemon: zenperfsnmp stopping...
Daemon: zenmodeler stopping...
Daemon: zentrap stopping...
Daemon: zenactions stopping...
Daemon: zenstatus stopping...
Daemon: zensyslog stopping...
Daemon: zenping stopping...
Daemon: zenhub stopping...
Daemon: zopectl . daemon process stopped
Daemon: zeoctl . daemon process stopped

[zenoss@applianceincloset ~]$ ps aux | grep py
raa-web   3055  0.0  0.6  45972 25580 ?        Ssl  Feb10   1:36 /usr/bin/python2.4 /usr/bin/raa-web-scgi /etc/raa/prod.cfg --no-daemon
root      3063  0.2  0.6  80592 25752 ?        Ssl  Feb10 130:04 /usr/bin/python2.4 /usr/bin/raa-service
raa-web  13605  0.2  0.5  46232 23472 ?        S    Mar15   7:19 /usr/bin/python2.4 /usr/bin/raa-web-scgi /etc/raa/prod.cfg --no-daemon
raa-web  15034  0.0  0.5  45972 23404 ?        S    Mar16   0:00 /usr/bin/python2.4 /usr/bin/raa-web-scgi /etc/raa/prod.cfg --no-daemon
zenoss   17273  7.6  0.6  43644 27340 ?        Rl   14:57   0:00 /usr/lib/zope/bin/python /home/zenoss/Products/ZenHub/zenhub.py --configfile /home/zenoss/etc/zenhub.conf --cycle --daemon

Note: raa is an appliance process, they dont need to be restarted.

[zenoss@applianceincloset ~]$ kill 17273
[zenoss@applianceincloset ~]$ ps aux | grep py
raa-web   3055  0.0  0.6  45972 25580 ?        Ssl  Feb10   1:36 /usr/bin/python2.4 /usr/bin/raa-web-scgi /etc/raa/prod.cfg --no-daemon
root      3063  0.2  0.6  80592 25752 ?        Ssl  Feb10 130:04 /usr/bin/python2.4 /usr/bin/raa-service
raa-web  13605  0.2  0.5  46232 23472 ?        S    Mar15   7:20 /usr/bin/python2.4 /usr/bin/raa-web-scgi /etc/raa/prod.cfg --no-daemon
raa-web  15034  0.0  0.5  45972 23404 ?        S    Mar16   0:00 /usr/bin/python2.4 /usr/bin/raa-web-scgi /etc/raa/prod.cfg --no-daemon
zenoss   17273  2.0  0.6  43620 27316 ?        Sl   14:59   0:00 /usr/lib/zope/bin/python /home/zenoss/Products/ZenHub/zenhub.py --configfile /home/zenoss/etc/zenhub.conf --cycle --daemon

Note: the process is still there, it didnt go away

[zenoss@applianceincloset ~]$ kill -9 17298
[zenoss@applianceincloset ~]$ ps aux | grep py
raa-web   3055  0.0  0.6  45972 25580 ?        Ssl  Feb10   1:36 /usr/bin/python2.4 /usr/bin/raa-web-scgi /etc/raa/prod.cfg --no-daemon
root      3063  0.2  0.6  80592 25752 ?        Ssl  Feb10 130:04 /usr/bin/python2.4 /usr/bin/raa-service
raa-web  13605  0.2  0.5  46232 23472 ?        S    Mar15   7:20 /usr/bin/python2.4 /usr/bin/raa-web-scgi /etc/raa/prod.cfg --no-daemon
raa-web  15034  0.0  0.5  45972 23404 ?        S    Mar16   0:00 /usr/bin/python2.4 /usr/bin/raa-web-scgi /etc/raa/prod.cfg --no-daemon
zenoss   17304  0.0  0.0   2912   800 pts/0    S+   15:00   0:00 grep py

Note: now its gone

[zenoss@applianceincloset ~]$ zenoss start
Daemon: zeoctl . daemon process started, pid=17317
Daemon: zopectl . daemon process started, pid=17321
Daemon: zenhub starting...
Daemon: zenping starting...
Daemon: zensyslog starting...
Daemon: zenstatus starting...
Daemon: zenactions starting...
Daemon: zentrap starting...
Daemon: zenmodeler starting...
Daemon: zenperfsnmp starting...
Daemon: zencommand starting...
Daemon: zenprocess starting...
Daemon: zenwin starting...
Daemon: zeneventlog starting...
Daemon: zenjmx starting...
Daemon: zenwebtx starting...
Daemon: zenwinperf starting...
Daemon: zenmailtx starting...
</code>