62 lines
1.8 KiB
Markdown
62 lines
1.8 KiB
Markdown
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# Hecate
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Hecate is the host-level bootstrap and power-protection service for Titan.
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It runs on `titan-db` and handles:
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- Staged **startup** (including Flux/Gitea bootstrap deadlock fallback)
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- Graceful **shutdown**
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- UPS-driven automatic shutdown decisions based on discharge/runtime
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## Why host-level
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A service inside Kubernetes cannot start a cluster that is fully down.
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Hecate runs outside the cluster under systemd, so it can always orchestrate bring-up.
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## Commands
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- `hecate startup --config /etc/hecate/hecate.yaml --execute --force-flux-branch main`
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- `hecate shutdown --config /etc/hecate/hecate.yaml --execute`
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- `hecate daemon --config /etc/hecate/hecate.yaml`
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- `hecate status --config /etc/hecate/hecate.yaml`
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## Manual install on titan-db
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```bash
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git clone git@gitea-admin:bstein/hecate.git
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cd hecate
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sudo ./scripts/install.sh
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sudoedit /etc/hecate/hecate.yaml
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sudo systemctl restart hecate.service
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```
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Bootstrap now (without reboot):
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```bash
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sudo systemctl start hecate-bootstrap.service
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```
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## Preconditions on titan-db
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- `kubectl` installed and configured (`kubeconfig` path in config)
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- SSH reachability to all cluster nodes
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- Remote sudo rights to run:
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- `systemctl start/stop k3s`
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- `systemctl start/stop k3s-agent`
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- UPS telemetry available via NUT (`upsc`)
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## Config
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See `configs/hecate.example.yaml`.
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UPS auto-shutdown trigger uses:
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- runtime threshold = `runtime_safety_factor * estimated_shutdown_budget`
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- default safety factor `1.10`
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- debounce across multiple polls to avoid noise
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Estimated shutdown budget is derived from historical successful shutdown runs (`/var/lib/hecate/runs.json`) with default fallback from config.
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## Notes
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- Default behavior for `startup` and `shutdown` is dry-run unless `--execute` is set.
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- `hecate-bootstrap.service` is enabled to run at host boot and perform staged startup automatically.
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