Supervisor is a client server system that allows its users to control a number of processes on UNIX-like operating systems It was inspired by the following Convenience It is often inconvenient to need to write rc d scripts for every single process instance rc d scripts are a great lowest-common-denominator form of process initialization autostart management but they can be painful to write and maintain Additionally rc d scripts cannot automatically restart a crashed process and many programs do not restart themselves properly on a crash Supervisord starts processes as its subprocesses and can be configured to automatically restart them on a crash It can also automatically be configured to start processes on its own invocation Accuracy It s often difficult to get accurate up down status on processes on UNIX Pidfiles often lie Supervisord starts processes as subprocesses so it always knows the true up down status of its children and can be queried conveniently for this data Delegation Users who need to control process state often need only to do that They don t want or need full-blown shell access to the machine on which the processes are running Processes which listen on low TCP ports often need to be started and restarted as the root user a UNIX misfeature It s usually the case that it s perfectly fine to allow normal people to stop or restart such a process but providing them with shell access is often impractical and providing them with root access or sudo access is often impossible It s also rightly difficult to explain to them why this problem exists If supervisord is started as root it is possible to allow normal users to control such processes without needing to explain the intricacies of the problem to them Supervisorctl allows a very limited form of access to the machine essentially allowing users to see process status and control supervisord-controlled subprocesses by emitting stop start and restart commands from a straightforward shell or web UI Process Groups Proc

📌 Process Supervisor (Raipur)
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📍 Raipur