+# Abort if there are no more servers left in the array.
+#
+for index in "${!TEST_GROUPS[@]}"; do
+ VIRL_SERVER[${index}]=""
+ while [[ ! "${VIRL_SERVER[${index}]}" ]]; do
+ num_hosts=${#VIRL_SERVERS[@]}
+ if [ $num_hosts == 0 ]
+ then
+ echo "No more VIRL candidate hosts available, failing."
+ exit 127
+ fi
+ element=$[ $RANDOM % $num_hosts ]
+ virl_server_candidate=${VIRL_SERVERS[$element]}
+ virl_server_status=$(ssh ${SSH_OPTIONS} ${VIRL_USERNAME}@${virl_server_candidate} cat $VIRL_SERVER_STATUS_FILE 2>&1)
+ echo VIRL HOST $virl_server_candidate status is \"$virl_server_status\"
+ if [ "$virl_server_status" == "$VIRL_SERVER_EXPECTED_STATUS" ]
+ then
+ # Candidate is in good status. Select this server.
+ VIRL_SERVER[${index}]="$virl_server_candidate"
+ else
+ # Candidate is in bad status. Remove from array.
+ VIRL_SERVERS=("${VIRL_SERVERS[@]:0:$element}" "${VIRL_SERVERS[@]:$[$element+1]}")
+ fi
+ done
+done
+
+echo "Selected VIRL servers: ${VIRL_SERVER[@]}"
+
+# Temporarily download VPP packages from nexus.fd.io
+if [ "${#}" -ne "0" ]; then
+ arr=(${@})
+ echo ${arr[0]}
+else
+ rm -f *.deb
+ VPP_STABLE_VER=$(cat ${SCRIPT_DIR}/VPP_STABLE_VER)
+ VPP_REPO_URL=$(cat ${SCRIPT_DIR}/VPP_REPO_URL)
+ VPP_CLASSIFIER="-deb"
+ wget -q "${VPP_REPO_URL}/vpp/${VPP_STABLE_VER}/vpp-${VPP_STABLE_VER}${VPP_CLASSIFIER}.deb" || exit
+ wget -q "${VPP_REPO_URL}/vpp-dbg/${VPP_STABLE_VER}/vpp-dbg-${VPP_STABLE_VER}${VPP_CLASSIFIER}.deb" || exit
+ wget -q "${VPP_REPO_URL}/vpp-dev/${VPP_STABLE_VER}/vpp-dev-${VPP_STABLE_VER}${VPP_CLASSIFIER}.deb" || exit
+ wget -q "${VPP_REPO_URL}/vpp-dpdk-dev/${VPP_STABLE_VER}/vpp-dpdk-dev-${VPP_STABLE_VER}${VPP_CLASSIFIER}.deb" || exit
+ wget -q "${VPP_REPO_URL}/vpp-dpdk-dkms/${VPP_STABLE_VER}/vpp-dpdk-dkms-${VPP_STABLE_VER}${VPP_CLASSIFIER}.deb" || exit
+ wget -q "${VPP_REPO_URL}/vpp-lib/${VPP_STABLE_VER}/vpp-lib-${VPP_STABLE_VER}${VPP_CLASSIFIER}.deb" || exit
+ wget -q "${VPP_REPO_URL}/vpp-plugins/${VPP_STABLE_VER}/vpp-plugins-${VPP_STABLE_VER}${VPP_CLASSIFIER}.deb" || exit
+fi
+
+VPP_DEBS=(*.deb)
+echo ${VPP_DEBS[@]}
+VIRL_DIR_LOC="/tmp"
+VPP_DEBS_FULL=(${VPP_DEBS[@]})
+
+# Prepend directory location at remote host to deb file list
+for index in "${!VPP_DEBS_FULL[@]}"; do
+ VPP_DEBS_FULL[${index}]=${VIRL_DIR_LOC}/${VPP_DEBS_FULL[${index}]}
+done
+
+echo "Updated file names: " ${VPP_DEBS_FULL[@]}
+
+cat ${VIRL_PKEY}
+
+# Copy the files to VIRL hosts
+DONE=""
+for index in "${!VIRL_SERVER[@]}"; do
+ # Do not copy files in case they have already been copied to the VIRL host
+ [[ "${DONE[@]}" =~ "${VIRL_SERVER[${index}]}" ]] && copy=0 || copy=1
+
+ if [ "${copy}" -eq "0" ]; then
+ echo "VPP deb files have already been copied to the VIRL host ${VIRL_SERVER[${index}]}"
+ else
+ scp ${SSH_OPTIONS} *.deb \
+ ${VIRL_USERNAME}@${VIRL_SERVER[${index}]}:${VIRL_DIR_LOC}/
+
+ result=$?
+ if [ "${result}" -ne "0" ]; then
+ echo "Failed to copy VPP deb files to VIRL host ${VIRL_SERVER[${index}]}"
+ echo ${result}
+ exit ${result}
+ else
+ echo "VPP deb files successfully copied to the VIRL host ${VIRL_SERVER[${index}]}"
+ fi
+ DONE+=(${VIRL_SERVER[${index}]})
+ fi
+done
+
+# Start a simulation on VIRL server
+
+function stop_virl_simulation {
+ for index in "${!VIRL_SERVER[@]}"; do
+ ssh ${SSH_OPTIONS} ${VIRL_USERNAME}@${VIRL_SERVER[${index}]}\
+ "stop-testcase ${VIRL_SID[${index}]}"
+ done
+}
+
+# Upon script exit, cleanup the simulation execution
+trap stop_virl_simulation EXIT
+
+for index in "${!VIRL_SERVER[@]}"; do
+ echo "Starting simulation nr. ${index} on VIRL server ${VIRL_SERVER[${index}]}"
+ VIRL_SID[${index}]=$(ssh ${SSH_OPTIONS} \
+ ${VIRL_USERNAME}@${VIRL_SERVER[${index}]} \
+ "start-testcase -c ${VIRL_TOPOLOGY} -r ${VIRL_RELEASE} ${VPP_DEBS_FULL[@]}")
+ retval=$?
+ if [ "$?" -ne "0" ]; then
+ echo "VIRL simulation start failed on ${VIRL_SERVER[${index}]}"
+ exit ${retval}
+ fi
+ if [[ ! "${VIRL_SID[${index}]}" =~ session-[a-zA-Z0-9_]{6} ]]; then
+ echo "No VIRL session ID reported."
+ exit 127
+ fi
+ echo "VIRL simulation started on ${VIRL_SERVER[${index}]}"
+
+ ssh_do ${VIRL_USERNAME}@${VIRL_SERVER[${index}]}\
+ cat /scratch/${VIRL_SID[${index}]}/topology.yaml
+
+ # Download the topology file from VIRL session and rename it
+ scp ${SSH_OPTIONS} \
+ ${VIRL_USERNAME}@${VIRL_SERVER[${index}]}:/scratch/${VIRL_SID[${index}]}/topology.yaml \
+ topologies/enabled/topology${index}.yaml
+
+ retval=$?
+ if [ "$?" -ne "0" ]; then
+ echo "Failed to copy topology file from VIRL simulation nr. ${index} on VIRL server ${VIRL_SERVER[${index}]}"
+ exit ${retval}
+ fi
+done
+
+echo ${VIRL_SID[@]}
+
+virtualenv --system-site-packages env