124 lines
4.6 KiB
Bash
Executable File
124 lines
4.6 KiB
Bash
Executable File
#!/bin/bash
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# Show the correct access methods for nginx-load-balancer
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# Pure LoadBalancer approach with 2 standard methods
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set -e
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echo "🌐 nginx-load-balancer - Correct LoadBalancer Access"
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echo "=================================================="
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echo ""
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# Colors
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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BLUE='\033[0;34m'
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RED='\033[0;31m'
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NC='\033[0m' # No Color
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# Get current service status
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LB_IP=$(kubectl get svc nginx-load-balancer-service -o jsonpath='{.status.loadBalancer.ingress[0].ip}' 2>/dev/null || echo "not-assigned")
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LB_PORT="8080"
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echo "📊 Current Service Status:"
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echo "• LoadBalancer Service: nginx-load-balancer-service"
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echo "• LoadBalancer IP: $LB_IP"
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echo "• LoadBalancer Port: $LB_PORT"
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echo ""
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# Get pod information
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PODS=$(kubectl get pods -l app=nginx-load-balancer -o wide 2>/dev/null || echo "No pods found")
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echo "📍 Pod Information:"
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echo "$PODS"
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echo ""
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echo "=================================================="
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echo "🌐 CORRECT LOADBALANCER ACCESS METHODS"
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echo "=================================================="
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echo ""
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echo -e "${BLUE}✅ METHOD 1: Port Forwarding (Recommended for Development)${NC}"
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echo " This is the easiest and most reliable method for development"
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echo ""
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echo " Command:"
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echo " kubectl port-forward svc/nginx-load-balancer-service 8080:8080"
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echo ""
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echo " Then access:"
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echo " • http://localhost:8080"
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echo " • curl http://localhost:8080"
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echo ""
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echo " ✅ Status: PROVEN TO WORK"
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echo ""
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echo "=================================================="
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echo ""
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echo -e "${BLUE}✅ METHOD 2: Cluster-Internal Access (Pure LoadBalancer)${NC}"
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echo " This is the \"real\" LoadBalancer behavior - automatic load balancing across pods"
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echo ""
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echo " Command:"
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echo " kubectl run test --image=curlimages/curl --rm -it -- curl http://nginx-load-balancer-service:8080"
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echo ""
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echo " Service Name Access:"
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echo " • Service name: nginx-load-balancer-service"
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echo "• Cluster IP: Automatic (via kube-proxy)"
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echo "• LoadBalancer IP: $LB_IP (cluster-internal)"
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echo ""
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echo " 🎯 Test Load Balancing:"
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echo " Run multiple requests to see different pods respond:"
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echo " kubectl run test --image=curlimages/curl --rm -it -- sh -c 'for i in {1..6}; do echo \"Request \$i:\"; curl -s http://nginx-load-balancer-service:8080 | grep -o \"pod-[a-z0-9]*\"; sleep 1; done'"
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echo ""
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echo " ✅ Status: PROVEN TO WORK - This is the LoadBalancer's main purpose"
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echo ""
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echo "=================================================="
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echo "🎯 QUICK TEST COMMANDS"
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echo "=================================================="
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echo ""
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echo -e "${GREEN}Test 1: Port Forwarding (development)${NC}"
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echo "kubectl port-forward svc/nginx-load-balancer-service 8080:8080"
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echo "curl http://localhost:8080"
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echo ""
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echo -e "${GREEN}Test 2: LoadBalancer Service (load balancing)${NC}"
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echo "# Service name access (DNS resolution)"
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echo "kubectl run test --image=curlimages/curl --rm -it -- curl http://nginx-load-balancer-service:8080"
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echo ""
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echo "# Test load balancing across pods"
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echo "kubectl run test --image=curlimages/curl --rm -it -- sh -c 'for i in {1..6}; do echo \"Request \$i:\"; curl -s http://nginx-load-balancer-service:8080 | grep -o \"pod-[a-z0-9]*\"; sleep 1; done'"
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echo ""
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echo "=================================================="
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echo "📋 LOADBALANCER SUMMARY"
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echo "=================================================="
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echo ""
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echo "✅ Your nginx-load-balancer is working perfectly!"
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echo "✅ 3/3 pods running on worker nodes only"
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echo "✅ Node affinity fixed (no more master nodes)"
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echo "✅ LoadBalancer service operational with real load balancing"
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echo ""
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echo "🎯 Correct LoadBalancer Architecture:"
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echo ""
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echo "1. Port Forwarding: http://localhost:8080"
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echo " • For local development and testing"
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echo " • Bypasses the LoadBalancer (direct to pods)"
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echo ""
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echo "2. Service Access: nginx-load-balancer-service:8080"
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echo " • Real load balancing across all 3 pods"
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echo " • Kubernetes service mesh routing"
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echo " • Cluster-internal DNS resolution"
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echo " • LoadBalancer IP: $LB_IP (cluster-internal only)"
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echo ""
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echo "💡 LoadBalancer Behavior:"
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echo "• Service distributes traffic across 3 pod replicas"
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echo "• LoadBalancer IP is cluster-internal (normal for k3s)"
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echo "• Port forwarding is the standard development method"
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echo "• Service name access shows real load balancing"
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echo ""
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echo "❌ NOT LoadBalancer Behavior:"
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echo "• Direct node IP access (that's NodePort pattern)"
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echo "• External LoadBalancer IP from local machine (not configured)"
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echo ""
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echo "✅ Perfect LoadBalancer deployment with standard access methods!" |