Kula

Kula is a lightweight, single-binary Linux server monitor. It collects
system metrics every second straight from /proc and /sys, stores them in a
built-in tiered ring-buffer engine, and serves them over a real-time web UI
dashboard and a terminal TUI. Zero external dependencies, no external
database — just install and go.

Collected metrics include CPU, GPU, load, memory, swap, network, disk I/O
and usage, thermals, battery, processes, containers (Docker/podman/cgroups)
and application probes (PostgreSQL, MySQL/MariaDB, nginx, apache2).

This snap uses STRICT confinement. After installing, connect the
observation interfaces so Kula can read system-wide metrics:

 sudo snap connect kula:system-observe

 sudo snap connect kula:hardware-observe

 sudo snap connect kula:mount-observe

 sudo snap connect kula:network-observe

 sudo snap connect kula:docker        # optional: Docker collector

The daemon starts automatically and listens on http://localhost:27960 by
default. Edit /var/snap/kula/current/config.yaml and run sudo snap restart kula.daemon to apply changes.