#!/bin/bash
# Health check script for Kubernetes cluster

echo "======================================"
echo "  Kubernetes Cluster Health Check"
echo "======================================"
echo ""

echo "=== Node Resources ==="
kubectl top nodes 2>&1 || echo "❌ Metrics server not working!"
echo ""

echo "=== High Memory Nodes (>85%) ==="
kubectl top nodes --no-headers | awk '$5 > 85 {print "⚠️  "$1" - "$5"% memory"}'
echo ""

echo "=== Pods without Resource Limits ==="
COUNT=$(kubectl get pods -A -o json | jq -r '.items[] | select(.spec.containers[].resources.limits == null) | .metadata.namespace + "/" + .metadata.name' 2>/dev/null | wc -l)
echo "$COUNT pods without resource limits"
echo ""

echo "=== Failing Pods ==="
kubectl get pods -A --field-selector=status.phase!=Running,status.phase!=Succeeded 2>/dev/null | grep -v "No resources found" || echo "✅ All pods running"
echo ""

echo "=== HPA Status ==="
kubectl get hpa -A 2>/dev/null | grep -v "No resources found" || echo "ℹ️  No HPAs configured"
echo ""

echo "=== Pods with High Restarts (>10) ==="
kubectl get pods -A -o json | jq -r '.items[] | select(.status.containerStatuses != null) | select(.status.containerStatuses[].restartCount > 10) | .metadata.namespace + "/" + .metadata.name + " - " + (.status.containerStatuses[].restartCount|tostring) + " restarts"' 2>/dev/null || echo "✅ No pods with excessive restarts"
echo ""

echo "=== Storage Status ==="
kubectl get pv | grep -c "Bound"
echo "persistent volumes bound"
echo ""

echo "=== Ingress Status ==="
kubectl get ingress -A | tail -n +2 | wc -l
echo "ingresses configured"
echo ""

echo "======================================"
echo "  Health Check Complete"
echo "======================================"