apiVersion: v1
kind: Pod
metadata:
  name: client
  namespace: istio-vt-t56-r2
  labels:
    app: client
  annotations:
    sidecar.istio.io/inject: "true"
spec:
  containers:
  - name: curl
    image: curlimages/curl:8.14.1
    command: ["sleep", "infinity"]
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: echo
  namespace: istio-vt-t56-r2
  labels:
    app: echo
spec:
  replicas: 1
  selector:
    matchLabels:
      app: echo
  template:
    metadata:
      labels:
        app: echo
      annotations:
        sidecar.istio.io/inject: "true"
    spec:
      containers:
      - name: echo
        image: mendhak/http-https-echo:37
        env:
        - name: HTTP_PORT
          value: "8080"
        - name: HTTPS_PORT
          value: "8443"
        ports:
        - containerPort: 8080
        - containerPort: 8443
---
apiVersion: v1
kind: Service
metadata:
  name: echo
  namespace: istio-vt-t56-r2
spec:
  selector:
    app: echo
  ports:
  - name: http
    port: 80
    targetPort: 8080
  - name: https
    port: 443
    targetPort: 8443
---
# CORRECTED from spec: net.ipv4.ip_local_port_range is on the kubelet safe sysctls
# allowlist, so it must be set via pod securityContext.sysctls at pod-creation time
# (applied pod-wide, i.e. to the shared netns of BOTH the curl container and the
# istio-proxy sidecar, by the CRI before container start) rather than via a runtime
# `sysctl -w` inside a container -- run 1 showed sysctl -w fails with "Read-only
# file system" for both a NET_ADMIN-capable container and the istio-proxy container
# (drop ALL caps, readOnlyRootFilesystem=true), because /proc/sys is masked at
# runtime regardless of capabilities; only kubelet/CRI-applied pod-level sysctls
# can write it before the netns is handed to the containers.
apiVersion: v1
kind: Pod
metadata:
  name: port-exhaust-client
  namespace: istio-vt-t56-r2
  labels:
    app: port-exhaust-client
  annotations:
    sidecar.istio.io/inject: "true"
spec:
  securityContext:
    sysctls:
    - name: net.ipv4.ip_local_port_range
      value: "32768 32787"   # exactly 20 ephemeral ports, pod-wide (shared with istio-proxy)
  containers:
  - name: curl
    image: curlimages/curl:8.14.1
    command: ["sleep", "infinity"]