Kusk Gateway Envoy Fleet Fails to Start

You encounter a kusk configuration issue that prevents your workflow from completing. This guide walks through the fix step by step.

Wrong ❌

apiVersion: kusk.io/v1alpha1
kind: EnvoyFleet
metadata: { name: default }
spec: { image: envoyproxy/envoy:v1.25-latest } # Missing resource limits

Wrong Output

EnvoyFleet never becomes Ready. Pods crash with OOMKill. CrashLoopBackOff.

Right ✅

apiVersion: kusk.io/v1alpha1
kind: EnvoyFleet
metadata: { name: default }
spec:
  image: envoyproxy/envoy:v1.27-latest
  replicas: 2
  resources: { limits: { memory: 512Mi, cpu: 500m }, requests: { memory: 256Mi, cpu: 250m } }
  ports: [{ port: 80, targetPort: 8080, name: http }, { port: 443, targetPort: 8443, name: https }]

Right Output

EnvoyFleet Ready. Pods: 2/2 running. Resources allocated.

Prevention

• Set resource requests and limits to prevent OOM kills.
• Use a stable Envoy image version.
• Configure at least 2 replicas for HA.
• Define both HTTP(80) and HTTPS(443) ports.
• Check logs: kubectl logs -l fleet=default -c envoy.

DodaTech applies similar defensive patterns across Doda Browser, DodaZIP, and Durga Antivirus Pro infrastructure for production reliability.

Common Mistakes with gateway envoy fleet

1. Non-exhaustive pattern matches that compile with warnings then crash at runtime
2. Misunderstanding that String is [Char] with poor performance for large text operations
3. Using foldl instead of foldl' causing stack overflow on large lists

These mistakes appear frequently in real-world KUSK code. DodaTech's contributors have identified these patterns through analysis of open-source projects and production systems.

Practice Exercise

Write a pure function that safely divides two integers using Maybe, then test it with edge cases like division by zero and negative numbers.

This exercise reinforces the concepts covered in this guide. Try implementing it before checking online solutions.

FAQ

This quick fix is part of the DodaTech infrastructure engineering series. Learn more at DodaTech tutorials.