[docker-syncd-bfn]: use service dependency in supervisord to start services

platform/barefoot/docker-syncd-bfn/start.sh

@@ -1,9 +1,4 @@
 #!/usr/bin/env bash
 
-rm -f /var/run/rsyslogd.pid
-
-supervisorctl start rsyslogd
-
 . /opt/bfn/install/bin/dma_setup.sh
 # . /opt/bfn/install/bin/bf_kdrv_mod_load /opt/bfn/install
-LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/bfn/install/lib supervisorctl start syncd

platform/barefoot/docker-syncd-bfn/supervisord.conf

@@ -3,33 +3,47 @@ logfile_maxbytes=1MB
 logfile_backups=2
 nodaemon=true
 
+[eventlistener:dependent-startup]
+command=python -m supervisord_dependent_startup
+autostart=true
+autorestart=unexpected
+startretries=0
+exitcodes=0,3
+events=PROCESS_STATE
+
 [eventlistener:supervisor-proc-exit-listener]
 command=/usr/bin/supervisor-proc-exit-listener --container-name syncd
 events=PROCESS_STATE_EXITED
 autostart=true
 autorestart=unexpected
 
-[program:start.sh]
-command=/usr/bin/start.sh
-priority=1
-autostart=true
-autorestart=false
-stdout_logfile=syslog
-stderr_logfile=syslog
-
 [program:rsyslogd]
-command=/usr/sbin/rsyslogd -n
+command=/usr/sbin/rsyslogd -n -iNONE
-priority=2
+priority=1
 autostart=false
 autorestart=false
 stdout_logfile=syslog
 stderr_logfile=syslog
+dependent_startup=true
+
+[program:start]
+command=/usr/bin/start.sh
+priority=2
+autostart=false
+autorestart=false
+startsecs=0
+stdout_logfile=syslog
+stderr_logfile=syslog
+dependent_startup=true
+dependent_startup_wait_for=rsyslogd:running
 
 [program:syncd]
+environment=LD_LIBRARY_PATH="/opt/bfn/install/lib"
 command=/usr/bin/syncd_start.sh
 priority=3
 autostart=false
 autorestart=false
 stdout_logfile=syslog
 stderr_logfile=syslog
-
+dependent_startup=true
+dependent_startup_wait_for=start:exited