metrics: Add iperf udp benchmark

This PR adds the iperf udp benchmark for bandwdith measurement
for network metrics.

Fixes #8246

Signed-off-by: Gabriela Cervantes <gabriela.cervantes.tellez@intel.com>

tests/metrics/network/iperf3_kubernetes/k8s-network-metrics-iperf3-udp.sh

@@ -0,0 +1,192 @@
+#!/bin/bash
+#
+# Copyright (c) 2023 Intel Corporation
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# This test measures the following UDP network essentials:
+# - bandwith simplex
+#
+# These metrics/results will be got from the interconnection between
+# a client and a server using iperf3 tool.
+# The following cases are covered:
+#
+# case 1:
+#  container-server <----> container-client
+#
+# case 2"
+#  container-server <----> host-client
+
+set -o pipefail
+
+SCRIPT_PATH=$(dirname "$(readlink -f "$0")")
+
+source "${SCRIPT_PATH}/../../lib/common.bash"
+iperf_file=$(mktemp iperfresults.XXXXXXXXXX)
+TEST_NAME="${TEST_NAME:-network-iperf3-udp}"
+COLLECT_ALL="${COLLECT_ALL:-false}"
+IPERF_DEPLOYMENT="${SCRIPT_PATH}/runtimeclass_workloads/iperf3-deployment.yaml"
+IPERF_DAEMONSET="${SCRIPT_PATH}/runtimeclass_workloads/iperf3-daemonset.yaml"
+
+function remove_tmp_file() {
+	rm -rf "${iperf_file}"
+}
+
+trap remove_tmp_file EXIT
+
+function iperf3_udp_all_collect_results() {
+	metrics_json_init
+	metrics_json_start_array
+	local json="$(cat << EOF
+	{
+		"bandwidth": {
+			"Result" : $bandwidth_result,
+			"Units" : "$bandwidth_units"
+		}
+	}
+EOF
+)"
+	metrics_json_add_array_element "$json"
+	metrics_json_end_array "Results"
+}
+
+function iperf3_udp_bandwidth() {
+	# Start server
+	local transmit_timeout="120"
+
+	kubectl exec -i "$client_pod_name" -- sh -c "iperf3 -c ${server_ip_add} -u -b 1G -t $transmit_timeout" | grep receiver | cut -d' ' -f13 > "${iperf_file}"
+	export bandwidth_result=$(cat "${iperf_file}")
+	export bandwidth_units="Mbits/sec"
+
+	if [ "$COLLECT_ALL" == "true" ]; then
+		iperf3_udp_all_collect_results
+	else
+		metrics_json_init
+		metrics_json_start_array
+
+		local json="$(cat << EOF
+		{
+			"bandwidth": {
+				"Result" : $bandwidth_result,
+				"Units" : "$bandwidth_units"
+			}
+		}
+EOF
+)"
+		metrics_json_add_array_element "$json"
+		metrics_json_end_array "Results"
+	fi
+}
+
+function iperf3_udp_start_deployment() {
+	cmds=("bc")
+	check_cmds "${cmds[@]}"
+
+	# Check no processes are left behind
+	check_processes
+
+	wait_time=20
+	sleep_time=2
+
+	# Create deployment
+	kubectl create -f "${IPERF_DEPLOYMENT}"
+
+	# Check deployment creation
+	local cmd="kubectl wait --for=condition=Available deployment/iperf3-server-deployment"
+	waitForProcess "${wait_time}" "${sleep_time}" "${cmd}"
+
+	# Create DaemonSet
+	kubectl create -f "${IPERF_DAEMONSET}"
+
+	# Get the names of the server pod
+	export server_pod_name=$(kubectl get pods -o name | grep server | cut -d '/' -f2)
+
+	# Verify the server pod is working
+	local cmd="kubectl get pod ${server_pod_name} -o yaml | grep 'phase: Running'"
+	waitForProcess "${wait_time}" "${sleep_time}" "${cmd}"
+
+	# Get the names of client pod
+	export client_pod_name=$(kubectl get pods -o name | grep client | cut -d '/' -f2)
+
+	# Verify the client pod is working
+	local cmd="kubectl get pod ${client_pod_name} -o yaml | grep 'phase: Running'"
+	waitForProcess "${wait_time}" "${sleep_time}" "${cmd}"
+
+	# Get the ip address of the server pod
+	export server_ip_add=$(kubectl get pod "${server_pod_name}" -o jsonpath='{.status.podIP}')
+}
+
+function iperf3_udp_deployment_cleanup() {
+	info "iperf: deleting deployments and services"
+	kubectl delete pod "${server_pod_name}" "${client_pod_name}"
+	kubectl delete -f "${IPERF_DAEMONSET}"
+	kubectl delete -f "${IPERF_DEPLOYMENT}"
+	kill_kata_components && sleep 1
+	kill_kata_components
+	check_processes
+	info "End of iperf3 test"
+}
+
+# The deployment must be removed in
+# any case the script terminates.
+trap iperf3_udp_deployment_cleanup EXIT
+
+function help() {
+echo "$(cat << EOF
+Usage: $0 "[options]"
+	Description:
+		This script implements a number of network metrics
+		using iperf3 with UDP.
+
+	Options:
+		-a      Run all tests
+		-b      Run bandwidth tests
+		-h      Help
+EOF
+)"
+}
+
+function main() {
+	init_env
+	iperf3_udp_start_deployment
+
+	local OPTIND
+	while getopts ":abh:" opt
+	do
+		case "$opt" in
+		a)      # all tests
+			test_all="1"
+			;;
+		b)      # bandwith test
+			test_bandwith="1"
+			;;
+		h)
+			help
+			exit 0;
+			;;
+		:)
+			echo "Missing argument for -$OPTARG";
+			help
+			exit 1;
+			;;
+		esac
+	done
+	shift $((OPTIND-1))
+
+	[[ -z "$test_bandwith" ]] && \
+	[[ -z "$test_all" ]] && \
+		help && die "Must choose at least one test"
+
+	if [ "$test_bandwith" == "1" ]; then
+		iperf3_udp_bandwidth
+	fi
+
+	if [ "$test_all" == "1" ]; then
+		export COLLECT_ALL=true && iperf3_udp_bandwidth
+	fi
+
+	info "iperf3: saving test results"
+	metrics_json_save
+}
+
+main "$@"