Using Monit to stop/start/restart OpenSimulator =============================================== Here are some basics to get you started using Monit [ http://mmonit.com/monit/ ] to start/stop/restart your OpenSim process(es). This example will check your sim every 30 seconds, and restart it if it's dead, or if SimFPS drops to 0 for 2 minutes, or CPU usage exceeds 300% (e.g. 3 cores on a quad-core machine... an occasional problem when running OpenSim via mono). I use these with OpenSim's REST console. To enable that, in the [Network] section of your OpenSim.ini , add: console_port = 9100 ConsoleUser = "console_username" ConsolePass = "console_password" setting them to whatever you desire. The nice thing about this is by having the console bind to its own TCP port you can easily firewall it off (though I wish you could just bind it to localhost). One quirk: right now OpenSim's REST console client expects bin/OpenSim.ConsoleClient.ini to exist, even if you use command line options exclusively. So just create an empty file with that name. Next, in the [Startup] section of your OpenSim.ini , add the following to enable the JSON sim stats: Stats_URI = "jsonSimStats" setting it to whatever you desire. The above would make some basic simulator stats available via http://yoursim.example.com:port/jsonSimStats where "port" is whatever you've set http_listener_port to in OpenSim.ini . Also in the [Startup] section, enable the writing of a PID file: PIDFile = "/var/run/opensim/opensim.pid" setting it to whatever you desire. Next, install Monit if you haven't already. With Ubuntu/Debian this is as simple as: # apt-get install monit Next, copy the monit/opensim.conf included here into wherever your Monit config files live. That might be /etc/monit/conf.d , maybe /etc/monit.d , or something similar. In that file make any necessary changes, e.g. to the PID file location, the uid OpenSim runs as, the gid OpenSim runs as, the start/stop mechanism you use to start/stop OpenSim, and the URL to view JSON sim stats for your sim. If you want, there's also an included script for starting/stopping/restarting OpenSim and connecting the REST console client. It's bin/opensim . Copy it to /usr/local/bin or wherever you keep such things. If you use the enclosed bin/opensim , change the following vars to whatever's appropriate for your system: MONO="/usr/bin/mono" PID="/var/run/opensim/${SIM}.pid" OPENSIM_DIR="/usr/lib/opensim" CONSOLE_PORT="9100" CONSOLE_USER="console_username" CONSOLE_PASS="console_password" See /etc/monit/monitrc on your system and change so suit your needs. It'll probably work out of the box without modification, but at a minimum you might want to change: set alert you@yourdomain.com set mail-format { from: monit@yourdomain.com } so email alerts will be sent with the correct from:/to: headers. Assuming you want to get the email notifications when Monit restarts OpenSim. Finally, fire up monit. # /etc/init.d/monit start Clear as mud? Let me know if you think any part needs clarification. -coyled <coyle@knifejaw.com>