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ryan4yin | 二花 90bbe8bc4f fix(monitoring): stop recurring false alerts (#395 )

The Telegram channel was dominated by alerts that can never be actionable:

- DriveTemperatureHigh/Critical did not filter temperature_type, so
  max(smartctl_device_temperature) picked the drive's rated
  op_limit_max/critical_limit_max instead of the actual reading. ai reported
  95 C and youko 130 C while the drives actually ran at 40-48 C.
- HostPhysicalComponentTooHot excluded label!="tctl", but the AMD k10temp
  hwmon sensor labels itself Tctl, so the CPU control temperature (up to
  ~100 C under load) tripped the alert on every AMD host.
- MicroVM guests share the host's read-only /nix/store, so their
  nix-gc.service always failed and tripped HostSystemdServiceCrashed on all
  six k3s guests. Disable automatic GC in the guest; the host's nix.gc
  reclaims the shared store.

The remaining k3s alert noise comes from workloads running on the masters
that belong on the workers; that is fixed in k8s-gitops, not by resizing
the control-plane VMs.

2026-10-07 12:51:30 +08:00

colmenaSystem.nix

refactor: rename the three VM hosts to 12kingdoms-*

2026-09-21 17:10:14 +08:00

default.nix

chore: remove dead configuration (#352 )

2026-10-03 10:09:38 +08:00

genK3sAgentModule.nix

feat(nixos): default-deny host inbound, trust the LAN/tailnet (#325 )

2026-09-26 14:02:03 +08:00

genK3sServerModule.nix

feat(nixos): default-deny host inbound, trust the LAN/tailnet (#325 )

2026-09-26 14:02:03 +08:00

genLibvirtDomainXml.nix

chore: drop the KubeVirt guest bits

2026-09-21 17:24:40 +08:00

genMicrovmGuestModule.nix

fix(monitoring): stop recurring false alerts (#395 )

2026-10-07 12:51:30 +08:00

genVmHostModule.nix

refactor: trim unused virtualisation config and packages (#332 )

2026-10-01 19:42:20 +08:00

macosSystem.nix

feat: format via 'ls **/*.nix | each { |it| nixfmt $it.name }'

2025-07-30 12:17:24 +08:00

nixosSystem.nix

chore: replace nixos-generators image outputs

2026-06-14 14:10:08 +08:00

README.md

docs: README audit fixes and de-duplication (#371 )

2026-10-03 18:28:58 +08:00

README.md

Library

This directory contains helper functions used by outputs/default.nix (and the installer flake) to reduce code duplication and make it easier to add new machines.

Current Functions

Core System Generators

macosSystem.nix - macOS configuration generator for nix-darwin
nixosSystem.nix - NixOS configuration generator
colmenaSystem.nix - Remote deployment configuration for colmena

Specialized Module Generators

genK3sServerModule.nix - K3s server node configuration generator
genK3sAgentModule.nix - K3s agent/worker node configuration generator
genVmHostModule.nix - physical VM host (bridge + libvirt) configuration generator
genMicrovmGuestModule.nix - NixOS microVM guest configuration generator
genLibvirtDomainXml.nix - libvirt domain XML generator (imported directly by host configs)

Entry Point

default.nix - Main entry point that imports the generators and exports them as a single attribute set, plus the relativeToRoot and scanPaths helpers

Usage

These functions are designed to:

Generate consistent configurations across different architectures
Provide type-safe configuration for complex systems
Enable easy scaling of the infrastructure
Support both local development and production deployments

Architecture Support

x86_64-linux: Primary desktop systems
aarch64-linux: ARM64 Linux systems (Apple Silicon, SBCs)
aarch64-darwin: Apple Silicon macOS systems