CP/DP Split: handle kill signal

Problem: The data plane container was not properly handling the kill signal when the Pod was Terminated.

Solution: Update the entrypoint to catch the proper signals.

Author: sjberman

build/entrypoint.sh

@@ -6,11 +6,12 @@ handle_term() {
     echo "received TERM signal"
     echo "stopping nginx-agent ..."
     kill -TERM "${agent_pid}" 2>/dev/null
+    wait -n ${agent_pid}
     echo "stopping nginx ..."
     kill -TERM "${nginx_pid}" 2>/dev/null
 }
 
-trap 'handle_term' TERM
+trap 'handle_term' TERM QUIT
 
 rm -rf /var/run/nginx/*.sock