Thread by @JohannesMalsam

Best practices for Kubernetes Pods 🧵

#Kubernetes #devops

1/11: 🎯 Single Responsibility Principle 🎯

Assign each Pod a single responsibility, focusing on a specific process or task. By keeping pods lean and focused, you enhance maintainability and avoid unnecessary complexity. #Modularity #ContainerOrchestration

2/11: ⚙️ Resource Allocation ⚙️

Allocate CPU and memory resources to each Pod based on its workload. Keep in mind the QoS Levels:
- Guaranteed (requests == limit)
- Burstable (requests < limit)
- BestEffort (no limit specified)
#ResourceOptimization #Efficiency

3/11: 🩺 Health Checks 🩺

Implement liveness and readiness probes within your pods to ensure their health and readiness for serving traffic.

This will prevent Pods from serving traffic when they are not healthy.

4/11: 🔒 ConfigMaps 🔒

Use ConfigMaps to configure applications within pods. This decouples configuration from the pod itself, allowing for flexible updates without redeploying the pod.
#ConfigurationManagement

5/11: 🔐 Secret Management 🔐

Protect sensitive information using Kubernetes Secrets. Load secrets as environment variables or volumes within pods.
#DataSecurity

6/11 🏷️ Pod Labels and Selectors 🏷️

Organize and identify pods using labels and selectors. This enables streamlined management, scalability, ingress routing, and service discovery within your Kubernetes environment.

7/11: 🤝 Pod Affinity and Anti-Affinity 🤝

Use Pod affinity and anti-affinity rules to control pod scheduling and placement.

Have workloads that require high network bandwidth? Don't schedule them to the same node.
#ResourceOptimization

8/11: ⏳ Termination Grace Period ⏳

Define appropriate termination grace periods for pods. Listen to OS Signals like SIGSTOP and SIGKILL to be aware of termination. Wait for the completion of connections to shut down the service gracefully. #GracefulShutdown

9/11: 📊 Logging and Monitoring 📊

Implement robust logging and monitoring solutions to collect, store and analyze pod logs and metrics.

Nothing is more frustrating than trying to troubleshoot problems without proper tooling.
#Observability #Performance

10/11: 🚀 Network Policies 🚀

Strengthen Kubernetes security by implementing network policies. Define rules to control ingress and egress traffic, allowing only authorized connections and protecting sensitive data within your cluster. #NetworkSecurity #DataProtection

11/11: 🔄 Immutable Pods 🔄

Consider pods as immutable entities, avoiding direct modifications to running pods. Instead, use declarative APIs like Deployments and Statefull Sets.