Best Practices for Kubernetes Services.

Use Appropriate Service Types:
- Choose the right service type based on your access requirements (ClusterIP for internal, NodePort or LoadBalancer for external access).
Leverage Labels and Selectors:
- Use meaningful labels for your pods and corresponding selectors in your services for efficient management.
Set Resource Limits:
- Define resource requests and limits for pods behind a service to ensure proper scheduling and prevent resource contention.
Use Readiness Probes:
- Implement readiness probes to ensure traffic is only sent to pods that are ready to handle requests.
Consider Session Affinity:
- Use session affinity when necessary to route a client's requests to the same pod.
Use Headless Services:
- For stateful applications or when you need DNS records for individual pods, use headless services.
Implement Health Checks:
- Use liveness and readiness probes to maintain service health and availability.
Secure Services:
- Use NetworkPolicies to control traffic to and from services.
- For external services, consider using an Ingress controller with TLS termination.
Monitor Service Performance:
- Set up monitoring for your services to track metrics like latency, error rates, and throughput.
Use ExternalName for External Services:
- Leverage ExternalName services to represent external dependencies within your cluster.
Consider Traffic Policies:
- Use the appropriate externalTrafficPolicy (Cluster or Local) based on your requirements for source IP preservation and routing efficiency.
Version Your Services:
- Use labels to version your services, facilitating easier upgrades and rollbacks.
Document Service Dependencies:
- Maintain clear documentation of service dependencies to aid in troubleshooting and scaling decisions.
Use Appropriate Ports:
- Be mindful of the ports you expose in your services, adhering to standard port conventions where applicable.
Implement Graceful Shutdown:
- Ensure your applications can handle termination signals to allow for graceful pod shutdown when services are updated.

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Best Practices for Kubernetes Services.

Priyadharshini Arangan

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