switch to supervisord, first step for multichannel support

docs/ffplayout-engine.service

@@ -1,12 +1,15 @@
 [Unit]
-Description=python and ffmpeg based playout
+Description=Supervisor process control system for UNIX
+Documentation=http://supervisord.org
 After=network.target
 
 [Service]
-ExecStart=/opt/ffplayout-engine/venv/bin/python /opt/ffplayout-engine/ffplayout.py
-ExecReload=/bin/kill -1 $MAINPID
-Restart=always
-RestartSec=1
+ExecStart=/opt/ffplayout-engine/venv/bin/supervisord -n -c /opt/ffplayout-engine/supervisor/supervisord.conf
+ExecStop=/opt/ffplayout-engine/venv/bin/supervisorctl $OPTIONS shutdown
+ExecReload=/opt/ffplayout-engine/venv/bin/supervisorctl $OPTIONS reload
+KillMode=process
+Restart=on-failure
+RestartSec=5s
 User=root
 Group=root
 

requirements-base.txt

@@ -1,3 +1,4 @@
-watchdog
 colorama
 pyyaml
+supervisor
+watchdog

requirements.txt

@@ -1,4 +1,4 @@
-colorama==0.4.3
-pathtools==0.1.2
+colorama==0.4.4
 PyYAML==5.3.1
-watchdog==0.10.3
+supervisor==4.2.1
+watchdog==1.0.2

supervisor/conf.d/engine-001.conf

@@ -0,0 +1,9 @@
+[program:ffplayout-engine-001]
+directory=/opt/ffplayout-engine
+command=./venv/bin/python3 ffplayout.py # -c ffplayout.yml
+killasgroup=true
+stopasgroup=true
+autorestart=true
+autostart=true
+startsecs=2
+startretries=10

supervisor/supervisord.conf

@@ -0,0 +1,14 @@
+[supervisord]
+# user=ffplayout
+
+[include]
+files = conf.d/*.conf
+
+[inet_http_server]
+port=127.0.0.1:9011
+
+[supervisorctl]
+serverurl=http://127.0.0.1:9011
+
+[rpcinterface:supervisor]
+supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface