Ignoring SIGURG in all cases

main.go

@@ -76,7 +76,11 @@ func main() {
 	go func() {
 
 		for sig := range stop {
-			if proc == nil {
+			if sig == syscall.SIGURG {
+				// SIGURG is used by Golang for it's own purposes, ignore it as these signals
+				// are most likely "junk" from Golang not from K8s/Docker
+				log(fmt.Sprintf("Received signal '%v', ignoring", sig))
+			} else if proc == nil {
 				// Signal received before the process even started. Let's just exit.
 				log(fmt.Sprintf("Received signal '%v', exiting", sig))
 				kill(1) // Attempt to stop sidecars if configured

scripts/self_destruct.sh

@@ -3,5 +3,10 @@
 # Helpful when testing signal handling
 # use:
 #       ./scuttle /bin/bash scripts/self_destruct.sh
-kill -INT $(pidof scuttle)
+scuttle_pid=$(pidof scuttle)
+echo "------ Sending SIGURG, should be ignored ------ "
+kill -URG $scuttle_pid
+echo "------ Sending SIGINT, Scuttle should pass to child, child should exit, scuttle should exit ------ "
+kill -INT $scuttle_pid
+# Print "." until process ends
 while 1>0; do echo -n "." && sleep 1; done;