feat: initial Provisioning Agent (check-in loop + ansible-pull)

Erste lauffaehige Version: laedt Credentials, meldet sich per Bearer-Token
bei anode/api/v1/agent/checkin, wendet zugewiesene Blueprints per
ansible-pull an und schlaeft bis zum naechsten Intervall.
This commit is contained in:
Thomas Stallinger 2026-08-01 15:55:26 +02:00
commit 8382a0a949
4 changed files with 168 additions and 0 deletions

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__pycache__/
*.pyc

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# provisioning-agent
Der Tuxflotte Provisioning Agent läuft auf installierten Geräten, meldet sich in regelmäßigen Abständen bei `anode` und wendet die ihm zugewiesenen Ansible-Rollen per `ansible-pull` an (siehe `ansible-content/`).
**Stand:** erste lauffähige Version. Die Einrichtung vor dem ersten Reboot (`backend_postinstall()`) ist noch nicht angebunden — Bootstrap läuft aktuell über den Dev-Endpoint `POST /api/v1/agent/bootstrap`.
## Manuelle Installation (Testgerät)
Voraussetzung: `ansible-core` ist installiert (`ansible-pull` im PATH).
1. Gerät aktivieren und Bereitstellungsvorlage zuweisen (bestehender Provisioning-Flow, siehe `provisioning-server`)
2. Agent-Secret erzeugen:
```
curl -X POST https://anode.tuxflotte.de/api/v1/agent/bootstrap \
-H "Content-Type: application/json" \
-d '{"device_id": "<device-uuid>"}'
```
3. Credentials ablegen:
```
install -d -m 0700 /etc/tuxflotte
cat > /etc/tuxflotte/agent.credentials <<EOF
{"device_id": "<device-uuid>", "agent_secret": "<agent-secret aus Schritt 2>"}
EOF
chmod 0600 /etc/tuxflotte/agent.credentials
```
4. Agent-Code ablegen und Dienst einrichten:
```
install -d /opt/tuxflotte/agent
cp agent.py /opt/tuxflotte/agent/
cp tuxflotte-agent.service /etc/systemd/system/
systemctl daemon-reload
systemctl enable --now tuxflotte-agent
```
5. Prüfen:
```
journalctl -u tuxflotte-agent -f
ls /run/tuxflotte/agent/applied/
```
## Konfiguration
| Umgebungsvariable | Zweck | Default |
|---|---|---|
| `TUXFLOTTE_ANODE_URL` | Basis-URL des Provisioning-Servers | `https://anode.tuxflotte.de` |
| `TUXFLOTTE_AGENT_CREDENTIALS` | Pfad zur Credentials-Datei | `/etc/tuxflotte/agent.credentials` |

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import json
import os
import shutil
import subprocess
import sys
import time
import urllib.error
import urllib.request
ANODE_URL = os.environ.get("TUXFLOTTE_ANODE_URL", "https://anode.tuxflotte.de")
CREDENTIALS_PATH = os.environ.get(
"TUXFLOTTE_AGENT_CREDENTIALS", "/etc/tuxflotte/agent.credentials"
)
FALLBACK_INTERVAL_SECONDS = 60
def log(message):
print(f"[tuxflotte-agent] {message}", flush=True)
def load_credentials():
with open(CREDENTIALS_PATH, "r", encoding="utf-8") as f:
credentials = json.load(f)
return credentials["device_id"], credentials["agent_secret"]
def checkin(device_id, agent_secret):
body = json.dumps({"device_id": device_id}).encode("utf-8")
req = urllib.request.Request(
ANODE_URL + "/api/v1/agent/checkin",
data=body,
headers={
"Content-Type": "application/json",
"Authorization": f"Bearer {agent_secret}",
},
method="POST",
)
with urllib.request.urlopen(req, timeout=15) as response:
return json.loads(response.read().decode("utf-8"))
def apply_blueprints(ansible_repo, blueprints):
roles = ",".join(b["ansible_role"] for b in blueprints)
log(f"Applying roles via ansible-pull: {roles}")
result = subprocess.run(
[
"ansible-pull",
"-U", ansible_repo,
"--tags", roles,
"-i", "localhost,",
"site.yml",
],
check=False,
)
if result.returncode != 0:
log(f"ansible-pull exited with status {result.returncode}")
def run_once(device_id, agent_secret):
result = checkin(device_id, agent_secret)
if not result.get("success"):
log(f"Check-in failed: {result.get('message', result.get('error'))}")
return FALLBACK_INTERVAL_SECONDS
blueprints = result.get("blueprints", [])
if blueprints:
apply_blueprints(result["ansible_repo"], blueprints)
else:
log("Check-in ok, nothing to do.")
return result.get("poll_interval_seconds", FALLBACK_INTERVAL_SECONDS)
def main():
if shutil.which("ansible-pull") is None:
log("ansible-pull nicht gefunden. Bitte ansible-core installieren.")
sys.exit(1)
device_id, agent_secret = load_credentials()
while True:
try:
interval = run_once(device_id, agent_secret)
except (urllib.error.URLError, OSError) as exc:
log(f"Check-in-Fehler: {exc}")
interval = FALLBACK_INTERVAL_SECONDS
time.sleep(interval)
if __name__ == "__main__":
main()

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[Unit]
Description=Tuxflotte Provisioning Agent
After=network-online.target
Wants=network-online.target
[Service]
Type=simple
ExecStart=/usr/bin/python3 /opt/tuxflotte/agent/agent.py
Restart=on-failure
RestartSec=10
[Install]
WantedBy=multi-user.target