sudo apt-get install supervisor 

In path /etc/supervisor/supervisord.conf we can configure it for any user:

[unix_http_server]
;file=/var/run/supervisor.sock ; (the path to the socket file)
file=/tmp/supervisor.sock ; (the path to the socket file)
chmod=0777 ; sockef file mode (default 0700)

$ service supervisor stop
$ service supervisor start

• supervisorctl status
• supervisorctl start process
• supervisorctl stop process

Add a configuration file .conf in /etc/supervisor/conf.d with a content similar to:

[program:cat]
command=/bin/cat
process_name=%(program_name)s
numprocs=1
directory=/tmp
umask=022
priority=999
autostart=true
autorestart=true
startsecs=10
startretries=3
exitcodes=0,2
stopsignal=TERM
stopwaitsecs=10
user=chrism
redirect_stderr=false
stdout_logfile=/a/path
stdout_logfile_maxbytes=1MB
stdout_logfile_backups=10
stdout_capture_maxbytes=1MB
stderr_logfile=/a/path
stderr_logfile_maxbytes=1MB
stderr_logfile_backups=10
stderr_capture_maxbytes=1MB
environment=A="1",B="2"
serverurl=AUTO

$ supervisorctl reread
$ supervisorctl update

Los eventos en Supervisor son mensajes de un tipo X que lanza Supervisord. Los posibles actualmente son: http://supervisord.org/events.html#event-types

Para ello sólo has de definir un listener (que no es más que otro programa) para supervisor. Se le dice qué programa es el receptor y qué eventos:

[eventlistener:mylistener]
command=my_custom_listener.py
events=PROCESS_STATE,TICK_60

El código de un listener puede ser el siguiente ( date cuenta que sigue un protocolo de OK → READY):

import sys
 
def write_stdout(s):
    sys.stdout.write(s)
    sys.stdout.flush()
 
def write_stderr(s):
    sys.stderr.write(s)
    sys.stderr.flush()
 
def main():
    while 1:
        write_stdout('READY\n') # transition from ACKNOWLEDGED to READY
        line = sys.stdin.readline()  # read header line from stdin
        write_stderr(line) # print it out to stderr
        headers = dict([ x.split(':') for x in line.split() ])
        data = sys.stdin.read(int(headers['len'])) # read the event payload
        write_stderr(data) # print the event payload to stderr
        write_stdout('RESULT 2\nOK') # transition from READY to ACKNOWLEDGED
 
if __name__ == '__main__':
    main()
    import sys

Superlance es un grupo de listeners ya programados que pueden ser utilizados.