Homelabv4/scripts/run-network-benchmark.sh

#!/bin/bash
set -e

echo "Starting Network Benchmark Between Nodes..."
echo ""

# Deploy iperf3 server on node-41
echo "Deploying iperf3 server on node-41..."
cat <<EOF | kubectl apply -f -
apiVersion: v1
kind: Pod
metadata:
  name: iperf3-server
  namespace: default
  labels:
    app: iperf3-server
spec:
  nodeSelector:
    kubernetes.io/hostname: talos-node-41
  containers:
  - name: iperf3
    image: networkstatic/iperf3:latest
    command: ["iperf3"]
    args: ["-s"]
    ports:
    - containerPort: 5201
      protocol: TCP
    securityContext:
      allowPrivilegeEscalation: false
      capabilities:
        drop:
          - ALL
      runAsNonRoot: true
      runAsUser: 1000
  securityContext:
    runAsNonRoot: true
    runAsUser: 1000
    seccompProfile:
      type: RuntimeDefault
---
apiVersion: v1
kind: Service
metadata:
  name: iperf3-server
  namespace: default
spec:
  selector:
    app: iperf3-server
  ports:
  - protocol: TCP
    port: 5201
    targetPort: 5201
  type: ClusterIP
EOF

echo "Waiting for server to be ready..."
kubectl wait --for=condition=ready pod/iperf3-server -n default --timeout=60s
sleep 2

echo ""
echo "=========================================="
echo "Test 1: node-42 → node-41"
echo "=========================================="
kubectl run iperf3-client-42 \
  --image=networkstatic/iperf3:latest \
  --restart=Never \
  --rm -i \
  --overrides='
{
  "spec": {
    "nodeSelector": {
      "kubernetes.io/hostname": "talos-node-42"
    },
    "securityContext": {
      "runAsNonRoot": true,
      "runAsUser": 1000,
      "seccompProfile": {
        "type": "RuntimeDefault"
      }
    },
    "containers": [{
      "name": "iperf3-client-42",
      "image": "networkstatic/iperf3:latest",
      "stdin": true,
      "tty": true,
      "command": ["iperf3", "-c", "iperf3-server", "-t", "10", "-P", "4"],
      "securityContext": {
        "allowPrivilegeEscalation": false,
        "capabilities": {
          "drop": ["ALL"]
        },
        "runAsNonRoot": true,
        "runAsUser": 1000
      }
    }]
  }
}' 2>/dev/null || true

echo ""
echo "=========================================="
echo "Test 2: node-43 → node-41"
echo "=========================================="
kubectl run iperf3-client-43 \
  --image=networkstatic/iperf3:latest \
  --restart=Never \
  --rm -i \
  --overrides='
{
  "spec": {
    "nodeSelector": {
      "kubernetes.io/hostname": "talos-node-43"
    },
    "securityContext": {
      "runAsNonRoot": true,
      "runAsUser": 1000,
      "seccompProfile": {
        "type": "RuntimeDefault"
      }
    },
    "containers": [{
      "name": "iperf3-client-43",
      "image": "networkstatic/iperf3:latest",
      "stdin": true,
      "tty": true,
      "command": ["iperf3", "-c", "iperf3-server", "-t", "10", "-P", "4"],
      "securityContext": {
        "allowPrivilegeEscalation": false,
        "capabilities": {
          "drop": ["ALL"]
        },
        "runAsNonRoot": true,
        "runAsUser": 1000
      }
    }]
  }
}' 2>/dev/null || true

echo ""
echo "=========================================="
echo "Test 3: node-44 → node-41"
echo "=========================================="
kubectl run iperf3-client-44 \
  --image=networkstatic/iperf3:latest \
  --restart=Never \
  --rm -i \
  --overrides='
{
  "spec": {
    "nodeSelector": {
      "kubernetes.io/hostname": "talos-node-44"
    },
    "securityContext": {
      "runAsNonRoot": true,
      "runAsUser": 1000,
      "seccompProfile": {
        "type": "RuntimeDefault"
      }
    },
    "containers": [{
      "name": "iperf3-client-44",
      "image": "networkstatic/iperf3:latest",
      "stdin": true,
      "tty": true,
      "command": ["iperf3", "-c", "iperf3-server", "-t", "10", "-P", "4"],
      "securityContext": {
        "allowPrivilegeEscalation": false,
        "capabilities": {
          "drop": ["ALL"]
        },
        "runAsNonRoot": true,
        "runAsUser": 1000
      }
    }]
  }
}' 2>/dev/null || true

echo ""
echo "=========================================="
echo "Cleaning up..."
kubectl delete pod iperf3-server -n default
kubectl delete service iperf3-server -n default

echo ""
echo "Network benchmark complete!"