messenger-worker.conf

[program:messenger-consume]
command=php -d memory_limit=%(ENV_CRON_MEMORY_LIMIT)s /src/bin/console %(ENV_CRON_COMMAND)s --limit=10
user=root
numprocs=1
startsecs=0
autostart=true
autorestart=true
startretries=10
process_name=%(program_name)s_%(process_num)02d

run.sh

cat messenger-worker.conf > /etc/supervisor/conf.d/messenger-worker.conf
export CRON_MEMORY_LIMIT=500M
export CRON_COMMAND="messenger:consume mail"

supervisord -n