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architecture-descriptionestablished · high operational burden

Kubernetes Patterns

Also known as: k8s-patterns, kubernetes-best-practices, container-patterns, pod-patterns

Intent

Design reliable, scalable Kubernetes applications: pod design, resource management, deployment strategies, observability, security.

Problem

Kubernetes is powerful but complex: resource management, pod lifecycle, networking, security, cost optimization. Need patterns for production.

Forces

  • •Declarative: desired state, controllers reconcile
  • •Immutable: replace, don't patch pods
  • •Ephemeral: pods die, reschedule, lose local state
  • •Shared: multi-tenant, noisy neighbor, resource quotas

Solution

✓ When to Use

  • •Containerized workloads at scale
  • •Team ready for operational complexity
  • •Multi-cloud / hybrid deployment needs
  • •Advanced scheduling, autoscaling needs

✗ When Not to Use

  • •Simple workloads (ECS Fargate, Cloud Run simpler)
  • •Team not ready for ops complexity
  • •Small scale (single digit services)
  • •Cost sensitivity (managed services cheaper)

Pros

  • +Portable: run anywhere (cloud, on-prem, edge)
  • +Rich ecosystem: operators, tools, patterns
  • +Powerful scheduling: bin-packing, affinity, priority
  • +Self-healing: controllers reconcile desired state

Cons

  • −Operational complexity: steep learning curve
  • −Control plane ops (unless managed EKS/GKE/AKS)
  • −Cost: control plane + nodes + storage + network
  • −Debugging: distributed, ephemeral, complex

Cost Profile

Infrastructure

High — control plane, nodes, storage, network

Operational

High — cluster ops, upgrades, security, cost

Cognitive

High — concepts, controllers, debugging

Failure Modes

  • OOM kill: no memory limits → pod killed, data loss

  • CPU throttling: low CPU limits → latency spikes

  • Pod disruption: no PDB → voluntary disruption kills all replicas

  • Resource quota exhaustion: namespace full → pod pending

  • Node pressure: disk/memory → eviction, cascade

Real-World Examples

Alternatives

  • ecs-fargate
  • cloud-run
  • cloud-run-functions
  • serverless
  • vm-based

Related Patterns

  • deployment-strategies
  • statefulset
  • operator-pattern
  • gitops
  • networkpolicy
  • rbac
  • pod-security
  • cost-optimization

Competency Domains

distribution communicationreliability opsscalingeconomics evolutiondeploymentsecurity compliance