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Debugging Tools

Essential tools and techniques for debugging applications in edge computing environments.

Kubernetes Debugging​

kubectl Debug Commands​

# Debug pod issues
kubectl describe pod <pod-name>
kubectl logs <pod-name> --previous
kubectl exec -it <pod-name> -- /bin/bash

# Debug networking
kubectl get endpoints
kubectl describe service <service-name>

Stern for Log Aggregation​

# Install stern
brew install stern

# Tail logs from multiple pods
stern myapp --namespace production

Application Debugging​

Remote Debugging Setup​

apiVersion: apps/v1
kind: Deployment
metadata:
  name: debug-app
spec:
  template:
    spec:
      containers:
      - name: app
        image: myapp:debug
        ports:
        - containerPort: 8080
        - containerPort: 5005  # Debug port
        env:
        - name: JAVA_TOOL_OPTIONS
          value: "-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:5005"

Performance Profiling​

# Install profiling tools
kubectl run profiler --image=brendangregg/perf-tools --rm -it -- bash

# Memory profiling
kubectl top pods --sort-by=memory
kubectl top nodes --sort-by=memory

Best Practices​

  1. Structured Logging: Use consistent log formats.
  2. Health Checks: Implement comprehensive health endpoints.
  3. Metrics Collection: Export relevant application metrics.
  4. Distributed Tracing: Use tools like Jaeger or Zipkin.

Next Steps​