Heimdall
The facts below are what the maker publishes about Heimdall, checked and dated. Our editors have not written about it yet.
The facts
Each one read from Heimdall's own pages, with the date it was checked.
What it does
- Alerts
- Declarative threshold rules with hysteresis can send webhooks when thresholds are breached or cleared.checked 9 Oct 2026
- Architecture
- Unprivileged daemons stream host metrics over gRPC to a central hub, which serves dashboards.checked 9 Oct 2026
- Backend compatibility
- The hub can persist to and recover from Prometheus-compatible backends including Prometheus, Thanos, Mimir and VictoriaMetrics.checked 9 Oct 2026
- CLI
- heimdall-cli provides typed JSON commands for querying hosts, processes, logs, and allow-listed diagnostics from scripts, CI/CD, and agents.checked 9 Oct 2026
- Command controls
- On-demand diagnostics are read-only and allow-listed, are opt-in per daemon, and are audited.checked 9 Oct 2026
- Commands
- On-demand diagnostics are read-only, allow-listed, opt-in per daemon and audited; privileged commands use the optional root helper.checked 9 Oct 2026
- Discovery and federation
- Daemons can discover a hub over mDNS, and hubs can relay metrics upstream across sites or networks.checked 9 Oct 2026
- Fleet discovery
- Daemons can discover a hub over mDNS, and hosts can be tagged to organize a fleet.checked 9 Oct 2026
- Installation
- The project provides separate hub, dashboard, daemon, and helper binaries, with the helper optional on each host.checked 9 Oct 2026
- Integrations
- The hub can expose Prometheus/OpenMetrics metrics for scraping by Prometheus and graphing in Grafana.checked 9 Oct 2026
- Intended use
- The README suggests using Heimdall for homelabs, GPU machines, server racks, or an individual laptop.checked 9 Oct 2026
- Intended users
- The maker presents Heimdall for homelabs, GPU machines, server racks and laptops, and for scripts, CI/CD and AI agents that query fleet data.checked 9 Oct 2026
- License
- The repository lists the project under the AGPL-3.0-or-later license.checked 9 Oct 2026
- License and support
- The project is licensed AGPL-3.0-or-later, and its README welcomes contributions such as metric adapters, platform ports, guides and bug fixes.checked 9 Oct 2026
- Limits
- Without a configured TSDB, hub history is bounded in memory and is lost when the hub restarts.checked 9 Oct 2026
- Logs
- Log streaming is opt-in by configuring log source aliases, and the hub caps pushed lines and keeps a bounded ring per host.checked 9 Oct 2026
- Metrics
- It monitors CPU, memory, disk, network, temperature, GPU, and power across multiple machines.checked 9 Oct 2026
- Network model
- Daemons send data over an outbound stream and do not listen for inbound connections.checked 9 Oct 2026
- Purpose
- Heimdall is a lightweight, cross-platform hardware monitoring system with a real-time terminal dashboard.checked 9 Oct 2026
- Security
- The secure deployment guide recommends requiring an enrollment token and enabling TLS for networked deployments; it says the default hub is plaintext and unauthenticated.checked 9 Oct 2026
Where it runs
- Platforms
- Prebuilt releases are listed for Linux, macOS, and Windows on amd64 and arm64.checked 9 Oct 2026
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