apiVersion: v1
kind: Pod
metadata:
  name: redis-internal-test
  namespace: redis-demo
spec:
  containers:
  - name: test
    image: redis:7-alpine
    command: ["sh", "-c"]
    args:
    - |
      echo "=== Testing Redis from inside cluster ==="
      echo "1. Testing DNS resolution..."
      nslookup redis-headless.redis-demo.svc.cluster.local
      
      echo ""
      echo "2. Testing individual pod DNS..."
      nslookup redis-0.redis-headless.redis-demo.svc.cluster.local
      nslookup redis-1.redis-headless.redis-demo.svc.cluster.local
      nslookup redis-2.redis-headless.redis-demo.svc.cluster.local
      
      echo ""
      echo "3. Testing Redis connectivity..."
      redis-cli -h redis-0.redis-headless.redis-demo.svc.cluster.local ping
      redis-cli -h redis-1.redis-headless.redis-demo.svc.cluster.local ping
      redis-cli -h redis-2.redis-headless.redis-demo.svc.cluster.local ping
      
      echo ""
      echo "4. Testing Redis operations..."
      redis-cli -h redis-headless.redis-demo.svc.cluster.local set test-key "from-cluster"
      VALUE=$(redis-cli -h redis-headless.redis-demo.svc.cluster.local get test-key)
      echo "SET/GET result: $VALUE"
      
      echo ""
      echo "=== Internal test completed ==="
      sleep 3600