# ntfy.schwenk.online

Self-hosted [ntfy](https://ntfy.sh) push server behind Traefik.

## Server setup

```bash
docker compose up -d
docker exec -it ntfy.schwenk.online ntfy user add frank --role=admin
```

## Per-host notifications

Each machine posts to a topic derived from its FQDN (`hostname -f`, lowercased, dots → hyphens).
For example, `web01.example.com` publishes to topic `web01-example-com`.

1. Create a user and access token in the web UI at https://ntfy.schwenk.online
2. Grant that user read-write access to the host topic (e.g. `web01-example-com`)
3. Install the command below on the machine, replacing `tk_PASTE_YOUR_TOKEN_HERE`

### Install `ntfyschwenkonline` on a client

Replace the token, then copy and paste the whole block:

```bash
sudo tee /usr/local/bin/ntfyschwenkonline > /dev/null <<'EOF'
#!/bin/sh
set -eu

NTFY_URL="https://ntfy.schwenk.online"
NTFY_TOKEN="tk_PASTE_YOUR_TOKEN_HERE"

topic() {
  hostname -s
}

if [ "$#" -gt 0 ]; then
  message="$*"
elif [ -t 0 ]; then
  echo "usage: ntfyschwenkonline [message]" >&2
  echo "       echo message | ntfyschwenkonline" >&2
  exit 1
else
  message=$(cat)
fi

curl -fsS \
  -H "Authorization: Bearer ${NTFY_TOKEN}" \
  -H "Title: $(hostname -s)" \
  -d "${message}" \
  "${NTFY_URL}/$(topic)"
EOF
sudo chmod 755 /usr/local/bin/ntfyschwenkonline
```

### Use

```bash
ntfyschwenkonline "backup finished"
echo "disk 95% full" | ntfyschwenkonline
```

Messages appear on the host topic in the ntfy web UI or any subscriber.