Damien Arnodo
4719a77f21
Without -R, iperf3's client sends and the server only receives, so traffic ran campus-host -> dc-server -- backwards for what these roles represent: dc-serverN is the DC-hosted service, campus-hostN is the consumer, and a real service delivers data to the consumer rather than just absorbing uploads from it. Refs #58
89 lines
2.9 KiB
Bash
Executable File
89 lines
2.9 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Generates DC<->Campus traffic over VRF gold using iperf3 (bundled in the
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# network-multitool image every host container runs), with a live
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# server/client bandwidth dashboard. Refs #55.
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set -euo pipefail
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DURATION="${1:?Usage: $0 <duration_seconds>}"
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if ! [[ "$DURATION" =~ ^[0-9]+$ ]] || [[ "$DURATION" -lt 1 ]]; then
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echo "Duration must be a positive integer (seconds)" >&2
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exit 1
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fi
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LAB_PREFIX="clab-arista-evpn-fabric"
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PORT=5301
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# server_name:server_ip:client_name — gold VRF pairs, stitched EVPN
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# Type-5 path DC -> Core -> Campus (see README Host Addressing table)
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PAIRS=(
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"dc-server2:10.34.34.102:campus-host1"
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"dc-server4:10.78.78.104:campus-host2"
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)
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WORKDIR="$(mktemp -d)"
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CLIENT_PIDS=()
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cleanup() {
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for pid in "${CLIENT_PIDS[@]:-}"; do
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kill "$pid" >/dev/null 2>&1 || true
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done
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for pair in "${PAIRS[@]}"; do
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IFS=':' read -r server _ _ <<<"$pair"
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docker exec "${LAB_PREFIX}-${server}" pkill -f "iperf3 -s -p ${PORT}" >/dev/null 2>&1 || true
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done
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rm -rf "$WORKDIR"
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}
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trap cleanup EXIT INT TERM
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echo "Starting iperf3 servers..."
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for pair in "${PAIRS[@]}"; do
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IFS=':' read -r server server_ip _ <<<"$pair"
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docker exec -d "${LAB_PREFIX}-${server}" iperf3 -s -p "$PORT"
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done
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sleep 1
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echo "Starting iperf3 clients for ${DURATION}s..."
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for pair in "${PAIRS[@]}"; do
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IFS=':' read -r server server_ip client <<<"$pair"
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logfile="${WORKDIR}/${client}.log"
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# -R: DC hosts the service, campus is the consumer -- data should flow
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# server -> client (download), not client -> server, to match how a
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# real DC-hosted service/campus-consumer pair behaves.
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docker exec "${LAB_PREFIX}-${client}" iperf3 -c "$server_ip" -p "$PORT" -R \
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-t "$DURATION" -i 1 --forceflush -f m >"$logfile" 2>&1 &
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CLIENT_PIDS+=("$!")
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done
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for ((elapsed = 0; elapsed <= DURATION; elapsed++)); do
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clear
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echo "EVPN/VXLAN lab traffic generator — ${elapsed}/${DURATION}s"
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echo
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echo "Servers (iperf3 -s):"
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for pair in "${PAIRS[@]}"; do
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IFS=':' read -r server server_ip _ <<<"$pair"
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echo " ${server} (${server_ip}:${PORT})"
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done
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echo
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echo "Clients (live bandwidth):"
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for pair in "${PAIRS[@]}"; do
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IFS=':' read -r server server_ip client <<<"$pair"
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logfile="${WORKDIR}/${client}.log"
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last_line="$(grep -E 'Mbits/sec' "$logfile" 2>/dev/null | tail -1 || true)"
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bw="$(sed -E 's/.*[[:space:]]([0-9.]+ Mbits\/sec).*/\1/' <<<"$last_line")"
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[[ -z "$last_line" ]] && bw="waiting..."
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printf " %-13s -> %-13s : %s\n" "$server" "$client" "$bw"
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done
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sleep 1
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done
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wait "${CLIENT_PIDS[@]}" 2>/dev/null || true
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echo
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echo "Done. Summary:"
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for pair in "${PAIRS[@]}"; do
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IFS=':' read -r server _ client <<<"$pair"
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logfile="${WORKDIR}/${client}.log"
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summary="$(grep -E 'receiver' "$logfile" 2>/dev/null || true)"
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echo " ${server} -> ${client}: ${summary:-no data}"
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done
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