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127 lines
4.3 KiB
Bash
Executable File
127 lines
4.3 KiB
Bash
Executable File
#!/bin/bash
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# Diagnostic script for 502 Bad Gateway error
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set -e
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NAMESPACE=${1:-production}
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APP_NAME="peikarband"
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echo "🔍 Diagnosing 502 Bad Gateway for $APP_NAME in namespace $NAMESPACE"
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echo "=========================================="
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echo ""
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# Colors
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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NC='\033[0m'
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# 1. Check Pods
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echo "1️⃣ Checking Pods..."
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echo "-------------------"
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PODS=$(kubectl get pods -n $NAMESPACE -l app.kubernetes.io/name=$APP_NAME --no-headers 2>/dev/null || echo "")
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if [ -z "$PODS" ]; then
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echo -e "${RED}❌ No pods found!${NC}"
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exit 1
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fi
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kubectl get pods -n $NAMESPACE -l app.kubernetes.io/name=$APP_NAME
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echo ""
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# Check pod status
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POD_STATUS=$(kubectl get pods -n $NAMESPACE -l app.kubernetes.io/name=$APP_NAME -o jsonpath='{.items[0].status.phase}' 2>/dev/null || echo "Unknown")
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POD_NAME=$(kubectl get pods -n $NAMESPACE -l app.kubernetes.io/name=$APP_NAME -o jsonpath='{.items[0].metadata.name}' 2>/dev/null || echo "")
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if [ "$POD_STATUS" != "Running" ]; then
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echo -e "${RED}❌ Pod is not Running! Status: $POD_STATUS${NC}"
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echo ""
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echo "Pod events:"
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kubectl describe pod -n $NAMESPACE $POD_NAME | tail -20
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echo ""
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fi
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# 2. Check Service
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echo "2️⃣ Checking Service..."
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echo "----------------------"
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kubectl get svc -n $NAMESPACE -l app.kubernetes.io/name=$APP_NAME
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echo ""
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# 3. Check Ingress
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echo "3️⃣ Checking Ingress..."
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echo "-----------------------"
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kubectl get ingress -n $NAMESPACE -l app.kubernetes.io/name=$APP_NAME
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echo ""
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# 4. Check Pod Logs
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if [ -n "$POD_NAME" ]; then
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echo "4️⃣ Recent Pod Logs (last 30 lines)..."
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echo "--------------------------------------"
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kubectl logs -n $NAMESPACE $POD_NAME --tail=30 || echo "Could not fetch logs"
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echo ""
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fi
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# 5. Check Readiness/Liveness
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if [ -n "$POD_NAME" ]; then
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echo "5️⃣ Checking Probe Status..."
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echo "----------------------------"
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READY=$(kubectl get pod -n $NAMESPACE $POD_NAME -o jsonpath='{.status.conditions[?(@.type=="Ready")].status}' 2>/dev/null || echo "Unknown")
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echo "Ready: $READY"
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# Check container status
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CONTAINER_STATUS=$(kubectl get pod -n $NAMESPACE $POD_NAME -o jsonpath='{.status.containerStatuses[0].ready}' 2>/dev/null || echo "Unknown")
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echo "Container Ready: $CONTAINER_STATUS"
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echo ""
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fi
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# 6. Test from inside pod
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if [ -n "$POD_NAME" ] && [ "$POD_STATUS" == "Running" ]; then
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echo "6️⃣ Testing /ping endpoint from inside pod..."
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echo "---------------------------------------------"
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kubectl exec -n $NAMESPACE $POD_NAME -- curl -s http://localhost:8000/ping || echo -e "${RED}❌ /ping failed!${NC}"
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echo ""
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fi
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# 7. Check Service Endpoints
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echo "7️⃣ Checking Service Endpoints..."
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echo "---------------------------------"
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SVC_NAME=$(kubectl get svc -n $NAMESPACE -l app.kubernetes.io/name=$APP_NAME -o jsonpath='{.items[0].metadata.name}' 2>/dev/null || echo "")
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if [ -n "$SVC_NAME" ]; then
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kubectl get endpoints -n $NAMESPACE $SVC_NAME
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ENDPOINTS=$(kubectl get endpoints -n $NAMESPACE $SVC_NAME -o jsonpath='{.subsets[0].addresses[*].ip}' 2>/dev/null || echo "")
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if [ -z "$ENDPOINTS" ]; then
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echo -e "${RED}❌ No endpoints! Service cannot route traffic.${NC}"
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echo "This is likely because readiness probe is failing."
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fi
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echo ""
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fi
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# 8. Check Resources
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if [ -n "$POD_NAME" ]; then
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echo "8️⃣ Checking Resource Usage..."
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echo "------------------------------"
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kubectl top pod -n $NAMESPACE $POD_NAME 2>/dev/null || echo "Metrics not available"
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echo ""
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fi
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# 9. Check Events
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echo "9️⃣ Recent Events..."
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echo "-------------------"
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kubectl get events -n $NAMESPACE --sort-by='.lastTimestamp' | grep $APP_NAME | tail -10 || echo "No recent events"
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echo ""
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# 10. NetworkPolicy check
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echo "🔟 Checking NetworkPolicy..."
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echo "---------------------------"
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kubectl get networkpolicy -n $NAMESPACE -l app.kubernetes.io/name=$APP_NAME || echo "No NetworkPolicy found"
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echo ""
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echo "=========================================="
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echo "✅ Diagnosis complete!"
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echo ""
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echo "Common fixes:"
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echo "1. If pod is CrashLoopBackOff: Check logs and resource limits"
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echo "2. If no endpoints: Readiness probe is failing - check /ping endpoint"
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echo "3. If NetworkPolicy exists: Check if it allows ingress traffic"
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echo "4. If resources exhausted: Increase limits in values-production.yaml"
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