Run a supervisord program conditionally

Question

Lets say I have two programs in supervisord. Is there a way to run the first program (background process) conditionally without having to move that to a separate script file?

[supervisord]
nodaemon=true
logfile=/tmp/supervisord.log

#Need this program to run conditionally - say based off an environment variable being set
[program:prog1]
command=/bin/prog1

[program:prog2]
command=/bin/prog2 -DFOREGROUND

Answer 1

Resurrecting an old thread, but @nelson's answer is incomplete. Namely, environment variables in supervisor need to be formatted as %(ENV_YOURVARIABLE)s in order to be recognized (notice the prefix ENV_, % sign before brackets and s at the end). Additionally, you have to export it before sending it to bash script:

[program:prog1]
command=bash -c "export INIT_PROG=%(ENV_INIT_PROG)s  && ./conditional-startup.sh"

conditional-startup.sh:

#!/bin/bash

if [ $INIT_PROG = "some value" ]; then
    /bin/prog1
fi

See also:

• Supervisor configuration

Answer 2

Pass conditional value to SERVER1_START and control the flow.

[program:somecommand]
command=bash -c "if [ ${SERVER1_START} = "VALUE-X" ]; then /apps/bin/start.sh 
/apps/server.properties; fi"