watchyourlan v0.1.0

Networking

WatchYourLAN — a lightweight network IP scanner that tracks devices on your LAN, shows online/offline history and sends notifications. Deployed as a single host-networked Nomad service.

nomad-pack run watchyourlan --registry nomploy

…or one line (add registry + run)

curl -fsSL https://packs.nomploy.com/install.sh | sh -s -- watchyourlan

Needs nomad-pack on PATH. The script only adds the nomploy registry and runs this pack.

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1 task http 8840 1 volume image aceberg/watchyourlan:latest tracks :latest image bumped today

Variables 11

values.hcl

Save as values.hcl, edit, then run:

nomad-pack run watchyourlan -f values.hcl --registry nomploy

# The name of the Nomad job.
job_name = "watchyourlan"

# The Nomad namespace to deploy into.
namespace = "default"

# The datacenters to deploy to.
datacenters = ["*"]

# The WatchYourLAN container image. Pin a tag in production.
image = "aceberg/watchyourlan:latest"

# Host port for the WatchYourLAN web UI.
port = 8840

# Named volume mounted at /data/WatchYourLAN (the SQLite database).
data_volume = "watchyourlan_data"

# Network interface(s) to scan, space-separated (IFACES). SET THIS to your host's real interface — run `ip -br link` to find it (e.g. "eth0" or "eth0 eth1").
ifaces = "eth0"

# Seconds between network scans (TIMEOUT).
timeout = 60

# Container timezone (TZ), e.g. Europe/Bratislava.
tz = "UTC"

# Placement constraints. On a nomploy cluster: attribute = "$${meta.nomploy_control_plane}", operator = "=", value = "true".
constraints = []

# The task resources.
resources = {
    cpu    = 300
    memory = 256
  }

Name	Type	Default	Description
job_name	string	"watchyourlan"	The name of the Nomad job.
namespace	string	"default"	The Nomad namespace to deploy into.
datacenters	list	["*"]	The datacenters to deploy to.
image	string	"aceberg/watchyourlan:latest"	The WatchYourLAN container image. Pin a tag in production.
port	number	8840	Host port for the WatchYourLAN web UI.
data_volume	string	"watchyourlan_data"	Named volume mounted at /data/WatchYourLAN (the SQLite database).
ifaces	string	"eth0"	Network interface(s) to scan, space-separated (IFACES). SET THIS to your host's real interface — run `ip -br link` to find it (e.g. "eth0" or "eth0 eth1").
timeout	number	60	Seconds between network scans (TIMEOUT).
tz	string	"UTC"	Container timezone (TZ), e.g. Europe/Bratislava.
constraints	list	[]	Placement constraints. On a nomploy cluster: attribute = "$${meta.nomploy_control_plane}", operator = "=", value = "true".
resources	object	{ cpu = 300 memory = 256 }	The task resources.

Back up this pack

This pack stores data in one Docker named volume: watchyourlan_data

restic

# Run on the node hosting this pack. Point restic at your repo first:
#   export RESTIC_REPOSITORY="s3:https://<account>.r2.cloudflarestorage.com/<bucket>"
#   export RESTIC_PASSWORD="<repo-password>"
#   export AWS_ACCESS_KEY_ID=<key>  AWS_SECRET_ACCESS_KEY=<secret>
restic backup \
  /var/lib/docker/volumes/watchyourlan_data/_data

rclone (sync to S3/R2)

rclone sync /var/lib/docker/volumes/watchyourlan_data/_data backup:<bucket>/watchyourlan_data

Paths assume the default Docker volume location (/var/lib/docker/volumes). Restore by stopping the job, restoring files into the same volume, and re-running the pack.

Readme

watchyourlan

WatchYourLAN — a lightweight network device monitor. It periodically ARP-scans your LAN, records every host it sees, shows an online/offline history and a live dashboard, and can send notifications (via Shoutrrr) when a device appears or goes away. Handy for spotting unknown devices on your network.

Single host-networked Nomad service with a persistent SQLite database.

Deploy

nomad-pack registry add nomploy https://github.com/Nomploy/nomad-packs
nomad-pack run watchyourlan --registry=nomploy

Configure

Variable	Default	Description
`port`	`8840`	Web UI port (`PORT`).
`ifaces`	`eth0`	Set this. Interface(s) to scan (`IFACES`), space-separated — run `ip -br link` on the host.
`timeout`	`60`	Seconds between scans (`TIMEOUT`).
`tz`	`UTC`	Container timezone (`TZ`).
`image`	`aceberg/watchyourlan:latest`	Container image. Pin a tag in production.
`data_volume`	`watchyourlan_data`	`/data/WatchYourLAN` — the SQLite database.
`resources`	`{ cpu = 300, memory = 256 }`	Task resources.

Needs the host network to see your LAN. This pack runs on the host network with NET_RAW/NET_ADMIN so it can ARP-scan. ifaces must name a real host interface, and the job only sees the LAN of the node it runs on — pin it with constraints to the node whose network you want to watch.