![]() From here, Monit needs to be built from source.Then, download and unpack Monit: wget tar zxf monit-5.6.tar.gz rm -f monit-5.6.tar.gz cd monit-5.6 That way, you always know where to find the temperamental data/source code you use for new installations.įirst, step into the /usr/local/src directory: cd /usr/local/src For organizational purposes, it is good practice to use /usr/local/src. Next, you will want to download and unpack Monit.This can be done with the following command: As a prerequisite to installing Monit, you'll want to make sure you have "development tools" installed.Monit is designed to make babysitting any resulting up-time issues during your troubleshooting much less painful, but it will not automatically fix an ongoing issue. Monit is quite extensible and can be easily customized or expanded for monitoring all kinds of services for small and large networks.Installing Monit will not fix the core problems that cause system services to go unresponsive. It will automatically restart any service or script. So for it I created the file /etc/monit/conf.d/flask_api and the contents are: check process flask_api with pidfile /var/run/flask_api.pid start = "/bin/su - user -c 'cd path /usr/bin/python3/app.py'" stop = "/usr/bin/killall python3" # path: the full dir_path Ex- /home/user/Desktop/Flask_APIĪnd that’s it. I created a small Flask API to deploy a Deep Learning model and wanted to restart it everytime the system restarts. So we can create the file /etc/monit/conf.d/ngix and the contents are: check process nginx with pidfile /run/nginx.pid start program = "systemctl start nginx" stop program = "systemctl stop nginx" Now to create a check for Ngix we have to drop in the process definition file into the config-directiory of Monit. # Set START to yes to start the monit START=yes Now, If we want Monit to also start at boot so I need to edit the service configuration file at /etc/default/monit and ensure “START” is set to “yes”. ![]() We can then use monit with the -t flag to verify the syntax of the configuration file is correct: $ sudo monit -t Control file syntax OK That’s it for the configuration file, though you might want to read through it and adjust other options for your environment or setup. So incase we want to enable the Monit HTTP Interface, we can edit the following lines accordingly set httpd port 2812 and use address 0.0.0.0 # only accept connection from localhost allow 0.0.0.0/0.0.0.0 # allow localhost to connect to the server allow admin:monit # require user 'admin' with password 'monit' Monit also comes with its own simple web interface and can be made available on the local network (since it’s all behind a firewall and not public anyway, if your not on a trusted network or to just want to be more secure you might want it listening on https and also protected by a login since the web interface allows you to start/stop jobs/commands). set daemon 60 # check services at 1-minute intervals with start delay 240 # delay the first check by 4-minutesīy default Monit check immediately after Monit start… You can simply comment or remove the 2nd line(with start delay 240) We can change the timings (in seconds) for how often the daemon is going to check for the status of the service (whether the service is running or not). Now we can edit the configuration file, which on the linux machine can be located at /etc/monit/monitrc Lets start by installing monit, which is very simple…. Monit conducts automatic maintenance and repair and can execute meaningful causal actions in error situations. Monit is a small Open Source utility for managing and monitoring Unix systems. But they shutdown/ stop working due to the server/ OS being patched or rebooted. Many times we might have services that are essential to be up and running in the background. A simple way to monitor and restart services using Monit
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