Principles of Resilient Self-Hosting on Linux

Self-hosting critical personal infrastructure requires treating your VPS like production:

1. Graceful Reloads: Web servers like Caddy and Nginx support atomic configuration validation and smooth reload signals (systemctl reload) without dropping in-flight TCP streams.
2. Deterministic Renewals: ACME certificates must have automated post-renewal hooks that concatenate extended trust anchors and notify dependent reverse proxies.
3. Principle of Least Privilege: Sensitive administrative endpoints should bind strictly to 127.0.0.1 and rely on SSH port forwarding or reverse proxy authentication rather than public internet exposure.

Keeping systems minimal, auditable, and automated ensures high uptime with zero routine maintenance overhead.