Insights
Kubernetes Deployment Strategies for Zero Downtime
Rolling, blue-green, and canary deployments each serve different risk and cost profiles.
Choose deployment strategy by risk profile
- Rolling update: simple and resource-efficient.
- Blue-green: clean rollback with environment switching.
- Canary: progressive exposure with real user traffic.
Traffic and health controls
Zero downtime depends on readiness checks, pod disruption budgets, and autoscaling tuned for rollout behavior.
- Use startup, liveness, and readiness probes correctly.
- Configure surge and unavailable thresholds intentionally.
- Gate rollout steps with automated SLO checks.
Rollback readiness
If rollback is manual and slow, deployment strategy is incomplete. Rehearse rollback paths and dependency reversibility in staging.