.

2026-08-22 12:49:53 +02:00 · 2026-01-27 17:35:45 -05:00
commit 2639af6531
176 changed files with 27104 additions and 0 deletions
@@ -0,0 +1,187 @@
+# Kubernetes Best Practices
+
+## Resource Management
+
+### Always Set Resource Requests and Limits
+```yaml
+resources:
+  requests:
+    memory: "256Mi"
+    cpu: "250m"
+  limits:
+    memory: "512Mi"
+    cpu: "500m"
+```
+
+**Guidelines:**
+- Requests = guaranteed resources
+- Limits = maximum resources
+- Set requests based on normal usage
+- Set limits based on peak usage
+- Memory limit = 2x request is common
+- Avoid CPU limits in most cases (causes throttling)
+
+### Use Horizontal Pod Autoscaler
+```yaml
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: myapp-hpa
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: myapp
+  minReplicas: 2
+  maxReplicas: 10
+  metrics:
+  - type: Resource
+    resource:
+      name: cpu
+      target:
+        type: Utilization
+        averageUtilization: 70
+```
+
+## Pod Configuration
+
+### Use Liveness and Readiness Probes
+```yaml
+livenessProbe:
+  httpGet:
+    path: /healthz
+    port: 8080
+  initialDelaySeconds: 30
+  periodSeconds: 10
+  failureThreshold: 3
+
+readinessProbe:
+  httpGet:
+    path: /ready
+    port: 8080
+  initialDelaySeconds: 5
+  periodSeconds: 5
+```
+
+### Configure Pod Disruption Budgets
+```yaml
+apiVersion: policy/v1
+kind: PodDisruptionBudget
+metadata:
+  name: myapp-pdb
+spec:
+  minAvailable: 2
+  selector:
+    matchLabels:
+      app: myapp
+```
+
+### Use Anti-Affinity for High Availability
+```yaml
+affinity:
+  podAntiAffinity:
+    preferredDuringSchedulingIgnoredDuringExecution:
+    - weight: 100
+      podAffinityTerm:
+        labelSelector:
+          matchLabels:
+            app: myapp
+        topologyKey: kubernetes.io/hostname
+```
+
+## Security
+
+### Run as Non-Root
+```yaml
+securityContext:
+  runAsNonRoot: true
+  runAsUser: 1000
+  runAsGroup: 1000
+  fsGroup: 1000
+```
+
+### Read-Only Root Filesystem
+```yaml
+securityContext:
+  readOnlyRootFilesystem: true
+volumeMounts:
+- name: tmp
+  mountPath: /tmp
+volumes:
+- name: tmp
+  emptyDir: {}
+```
+
+### Drop All Capabilities
+```yaml
+securityContext:
+  capabilities:
+    drop:
+    - ALL
+```
+
+## Networking
+
+### Use Network Policies
+```yaml
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: deny-all
+spec:
+  podSelector: {}
+  policyTypes:
+  - Ingress
+  - Egress
+```
+
+### Service Mesh for mTLS
+- Istio, Linkerd, or Consul Connect
+- Automatic encryption between services
+- Traffic management capabilities
+
+## Configuration Management
+
+### Use ConfigMaps for Configuration
+```yaml
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: app-config
+data:
+  LOG_LEVEL: "info"
+  DATABASE_HOST: "postgres.default.svc"
+```
+
+### Use Secrets for Sensitive Data
+```yaml
+apiVersion: v1
+kind: Secret
+metadata:
+  name: app-secrets
+type: Opaque
+stringData:
+  DATABASE_PASSWORD: "secret123"
+```
+
+### External Secrets for Production
+- Use External Secrets Operator
+- Integrate with Vault, AWS Secrets Manager, etc.
+- Never commit secrets to git
+
+## Observability
+
+### Structured Logging
+- Output JSON logs
+- Include correlation IDs
+- Use consistent field names
+
+### Metrics
+- Expose Prometheus metrics
+- Use standard naming conventions
+- Include SLI metrics
+
+### Distributed Tracing
+- Implement OpenTelemetry
+- Propagate trace context
+- Sample appropriately