Guide: Deploy Python Bots on Docker and VPS Using StayPresent Supervisor

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Developers running Python bots on self-hosted infrastructure such as a VPS or Docker container lack the automatic restart and health-check features offered by managed platforms like Render or Railway. StayPresent, a Python package, fills this gap by managing bot subprocesses and exposing a built-in health endpoint compatible with Docker's native HEALTHCHECK instruction. When running inside Docker, StayPresent requires no special container configuration and works alongside Docker's restart policies for layered recovery. On a plain VPS without Docker, systemd can be configured to supervise the StayPresent process itself, creating a two-tier resilience system where StayPresent handles bot crashes and systemd handles interpreter-level failures. Together, these tools replicate key reliability features of managed platforms on fully self-hosted infrastructure.

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