ttcn3-bts: Fix most OML test failing after osmo-bts shutdown optimization

Since osmo-bts.git 0a6bdb024f5429a35c56178496158c9b1c3ee032, the process
is quickly terminated during shutdown if no TRX is running. Since in the
OML tests the TTCN3 components implements the OML IPA server side, most
of the time when osmo-bts starts it finds no one listening on the
address and exits immediately. This makes respawn.sh script run osmo-bts
lots of times per seconds (since osmo-bts terminates quicker now). As a
result, it quickly consumes the 500 launch threshold and exits without
starting osmo-bts being launched anymore.
As a result, only first tests pass, and all the later ones fail because
osmo-bts never connects.

Let's add a sleep 1 between respawns in respawn.sh only when running OML
tests (not needed in the others since there's an osmo-bsc always
running). This also clears a lot of output in the logs of osmo-bts
processes restarting over and over again.

Change-Id: I10d3e1ef8325dd78f9ae2b95fbfd1c6d893bf8a4

osmo-bts-master/respawn.sh

@@ -2,6 +2,8 @@
 
 trap "kill 0" EXIT
 
+SLEEP_BEFORE_RESPAWN=${SLEEP_BEFORE_RESPAWN:-0}
+
 i=0
 max_i=500
 while [ $i -lt $max_i ]; do
@@ -10,6 +12,10 @@ while [ $i -lt $max_i ]; do
 	LAST_PID=$!
 	wait $LAST_PID
 	echo "$i: stopped pid $LAST_PID with status $?"
+	if [ $SLEEP_BEFORE_RESPAWN -gt 0 ]; then
+		echo "sleeping $SLEEP_BEFORE_RESPAWN seconds..."
+		sleep $SLEEP_BEFORE_RESPAWN
+	fi
 	i=$(expr $i + 1)
 done
 echo "exiting after $max_i runs"

ttcn3-bts-test/jenkins.sh

@@ -24,6 +24,7 @@ start_bsc() {
 start_bts() {
 	local variant
 	variant="$1"
+	sleep_time_respawn="$2"
 	echo Starting container with BTS
 	if [ -z "$variant" ]; then
 		echo ERROR: You have to specify a BTS variant
@@ -34,6 +35,7 @@ start_bts() {
 			--ulimit core=-1 \
 			-v $VOL_BASE_DIR/bts:/data \
 			-v $VOL_BASE_DIR/unix:/data/unix \
+			-e "SLEEP_BEFORE_RESPAWN=$sleep_time_respawn" \
 			--name ${BUILD_TAG}-bts -d \
 			$DOCKER_ARGS \
 			$REPO_USER/osmo-bts-$IMAGE_SUFFIX \
@@ -127,7 +129,7 @@ mkdir $VOL_BASE_DIR/virtphy
 
 # 1) classic test suite with BSC for OML and trxcon+fake_trx
 start_bsc
-start_bts trx
+start_bts trx 0
 start_fake_trx
 start_trxcon
 start_testsuite
@@ -139,7 +141,7 @@ docker container kill ${BUILD_TAG}-trxcon
 docker container kill ${BUILD_TAG}-fake_trx
 docker container kill ${BUILD_TAG}-bts
 cp virtphy/osmo-bts.cfg $VOL_BASE_DIR/bts/
-start_bts virtual
+start_bts virtual 0
 start_virtphy
 # ... and execute the testsuite again with different cfg
 cp virtphy/BTS_Tests.cfg $VOL_BASE_DIR/bts-tester/
@@ -151,7 +153,7 @@ docker container kill ${BUILD_TAG}-bsc
 docker container kill ${BUILD_TAG}-virtphy
 docker container kill ${BUILD_TAG}-bts
 cp oml/osmo-bts.cfg $VOL_BASE_DIR/bts/
-start_bts trx
+start_bts trx 1
 start_fake_trx
 start_trxcon
 # ... and execute the testsuite again with different cfg