leader_file check

docker/Dockerfile

@@ -6,6 +6,9 @@ RUN pip install --no-cache-dir -r /requirements.txt
 
 ADD main.py /
 
-ENTRYPOINT ["/usr/local/bin/python3", "/main.py"]
+ADD run_manager.sh /
+ADD launch_light_manager.sh /
+
+ENTRYPOINT ["/run_manager.sh"]
 
 

launch_light_manager.sh

@@ -0,0 +1,2 @@
+#!/bin/sh
+/usr/local/bin/python3 /main.py

run_manager.sh

@@ -0,0 +1,67 @@
+#!/bin/sh
+FILE=/services/leader_file.txt
+
+function start_light_manager() {
+ echo "Starting Light Manager"
+ /launch_light_manager.sh &
+
+}
+
+
+function stop_light_manager() {
+
+ cont=0
+ while pgrep -f /launch_light_manager.sh > /dev/null 2>&1; do
+
+ force=""
+
+ if [ $cont -gt 9 ]; then
+ echo "Forcing kill /launch_light_manager.sh"
+ force="-9"
+ fi
+
+ ppid=$(ps | grep /launch_light_manager.sh | awk '{print $1}' | head -n 1)
+
+ pkill $force -P $ppid
+
+
+ if [ $? -eq 0 ]; then # il processo esisteva ed è stato killato
+ echo "Killed /launch_light_manager.sh "
+ fi
+
+ echo "Waiting for /launch_light_manager.sh death ..."
+
+ sleep 1
+ cont=$((cont+1))
+ done
+
+}
+
+
+function check() {
+
+ if [[ -f $FILE ]] ; then
+
+ # il file esiste
+
+ if ! pgrep -f /launch_light_manager.sh > /dev/null 2>&1 ; then
+ start_light_manager
+ fi
+
+ else
+
+ # il file non esiste
+ stop_light_manager
+
+ fi
+
+}
+
+trap "echo 'Ricevuto Signal SIGUSR1'; check" SIGUSR1
+
+while true;
+ do
+ check
+ sleep 5 &
+ wait $!
+done