Zero-Downtime Deployments with Docker Compose – No Kubernetes Required

StatusDude demonstrates that zero-downtime deployments are achievable with Docker Compose and HAProxy without Kubernetes, serving thousands of monitoring checks per minute across multiple regions. After Traefik failed due to routing conflicts during rolling deploys and its inability to retry failed requests on healthy backends, the company switched to HAProxy, which successfully handles their multi-daily deployments with zero dropped requests. The key requirements for zero-downtime deployments are multiple backend instances, a load balancer capable of retrying on different backends, and a rolling deployment script.