Activate sml2mqtt bridge (privileged USB access, stdout logging, replicas 1) #84

2026-06-27T20:59:16Z

k.renner commented

2026-06-27 20:59:16 +00:00

Phase 2 — activate the meter bridge (edl21 now disabled, port free)

Follow-up to #83. EDL21 has been disabled in HA, freeing the meter's serial port, so the dormant bridge is activated. Three fixes found during bring-up:

logging.file: stdout (was ''). Empty string made sml2mqtt open the /sml2mqtt config directory as a logfile → IsADirectoryError crashloop. stdout sends logs to the container console.
securityContext.privileged: true (+ runAsUser: 0). The device is root:root 0600 and the device cgroup blocks a hostPath-mounted char device for non-privileged containers even as root. No device-plugin exists; the existing USB pods (zwave-js, home-assistant) already use this exact privileged pattern. User-approved.
replicas: 0 → 1 — port is free, no edl21 contention.

After merge

Bridge starts reading the meter and publishing to sml2mqtt/# on Mosquitto. I'll then observe the actual topics/device-id, add HA mqtt: sensors in the homeassistant repo reusing the old entity_ids (history-preserving), and finally evict HA from edge.

kubectl kustomize kubernetes/apps/home-assistant builds clean.

Generated with Claude Code

## Phase 2 — activate the meter bridge (edl21 now disabled, port free) Follow-up to #83. EDL21 has been disabled in HA, freeing the meter's serial port, so the dormant bridge is activated. Three fixes found during bring-up: - **`logging.file: stdout`** (was `''`). Empty string made sml2mqtt open the `/sml2mqtt` config *directory* as a logfile → `IsADirectoryError` crashloop. `stdout` sends logs to the container console. - **`securityContext.privileged: true`** (+ `runAsUser: 0`). The device is `root:root 0600` **and** the device cgroup blocks a hostPath-mounted char device for non-privileged containers even as root. No device-plugin exists; the existing USB pods (`zwave-js`, `home-assistant`) already use this exact privileged pattern. **User-approved.** - **`replicas: 0 → 1`** — port is free, no edl21 contention. ### After merge Bridge starts reading the meter and publishing to `sml2mqtt/#` on Mosquitto. I'll then observe the actual topics/device-id, add HA `mqtt:` sensors in the `homeassistant` repo reusing the old entity_ids (history-preserving), and finally evict HA from edge. `kubectl kustomize kubernetes/apps/home-assistant` builds clean. Generated with Claude Code

k.renner added 1 commit 2026-06-27 20:59:16 +00:00

feat(home-assistant): activate sml2mqtt bridge (privileged, stdout, replicas 1) 0ad25fbe1a

edl21 has been disabled in HA, freeing the meter's serial port, so the
bridge is activated for the cutover.

Three fixes from bring-up testing:
- logging.file: stdout (was ''). Empty string made sml2mqtt try to open
  the /sml2mqtt config dir as a log file (IsADirectoryError crash loop).
  'stdout' routes logs to the container console for kubectl/Loki.
- securityContext.privileged: true (with runAsUser 0). The meter device
  is root:root 0600, AND the device cgroup blocks a hostPath-mounted char
  device for non-privileged containers even as root. There is no
  device-plugin in the cluster; the existing USB pods (zwave-js, HA) use
  the same privileged pattern. User-approved.
- replicas: 0 -> 1 (port is now free; no edl21 contention).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

k.renner merged commit 5d1764562e into master

2026-06-27 20:59:41 +00:00

k.renner referenced this issue from a commit

2026-06-27 20:59:42 +00:00

Merge pull request 'Activate sml2mqtt bridge (privileged USB access, stdout logging, replicas 1)' (#84) from worktree-ha-meter-mqtt-bridge into master

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Reference: konairius/homelab#84