Merge branch 'main' into llama-server+open-webui/initial/local-llm-inference

Apps/docker-ip-addr-manager/HOW_TO_VERIFY.md

@@ -67,7 +67,27 @@ Förväntat resultat:
 - posten med `10.0.4.2` har `used=true`.
 - `containers` innehåller `ip-verify-nginx`.
 
-### Test C: Disable/Delete efter frigöring
+### Test C: DNS create när posten är enabled + used
+
+Förutsätter DNS config i appen, exempel för AdGuard:
+
+- `DNS_PROVIDER=adguard`
+- `DNS_BASE_DOMAIN=home.arpa`
+- `ADGUARD_URL=http://<adguard-ip>:3000`
+- `ADGUARD_USERNAME=<user>`
+- `ADGUARD_PASSWORD=<password>`
+
+Verifiera att record skapats:
+
+```bash
+dig +short lan-test.home.arpa @<adguard-ip>
+```
+
+Förväntat resultat:
+
+- returnerar `10.0.4.2`.
+
+### Test D: Disable/Delete efter frigöring
 
 Stoppa testcontainer:
 
@@ -103,7 +123,7 @@ Förväntat resultat:
 
 ## 3) Negativt / fail-closed testfall
 
-### Test D: Blockera disable när IP används
+### Test E: Blockera disable när IP används
 
 1. Skapa + enable som i Test A.
 2. Starta container som i Test B.
@@ -120,19 +140,39 @@ Förväntat resultat:
 - HTTP `409`.
 - feltext som anger att posten används av container.
 
+### Test F: Fail-closed vid DNS-fel
+
+1. Se till att en post är `enabled` och `used` (Test A+B).
+2. Sabotera DNS-auth tillfälligt, exempel:
+   - ändra `ADGUARD_PASSWORD` till fel värde och starta om appen.
+3. Försök disable/delete på posten.
+
+```bash
+curl -sS -o /tmp/dns-fail.out -w '%{http_code}\n' \
+  -X POST "http://127.0.0.1:31810/api/entries/${ENTRY_ID}/disable"
+cat /tmp/dns-fail.out
+```
+
+Förväntat resultat:
+
+- HTTP `409` eller `503`.
+- feltext som indikerar DNS-synkfel.
+- posten ska inte lämna systemet i delvis uppdaterat läge.
+
 ## 4) DNS / nät / TLS verifiering
 
 ### DNS (om hostname används i LAN)
 
 ```bash
 DNS_SERVER="<dns-server-ip>"
-HOSTNAME_TO_TEST="<hostname-i-lan>"
+HOSTNAME_TO_TEST="lan-test.home.arpa"
 dig +short "${HOSTNAME_TO_TEST}" @"${DNS_SERVER}"
 ```
 
 Förväntat resultat:
 
-- returnerar avsedd LAN-IP.
+- returnerar avsedd LAN-IP när posten är `enabled && used`.
+- ingen träff när posten inte längre är `used` eller är `disabled`.
 
 ### Nätverk (lyssning och routning)
 

Apps/docker-ip-addr-manager/README.md

@@ -13,12 +13,16 @@ Exempel: istället för att köra `ip addr add 10.0.4.2/16 dev eth0` via SSH, ka
 - Sorterbar tabell: namn, IP-adress, used/unused, containernamn, device, enable/disable.
 - Used/unused-kontroll via Docker API (`NetworkSettings.Ports`) med exakt `HostIp`-match.
 - Include stopped containers i used-kontroll.
+- DNS-livscykel (opt-in): skapar A-record när `enabled=true` och `used=true`, tar bort record när villkoret inte längre gäller.
+- DNS-namn byggs från `name` + `DNS_BASE_DOMAIN` => `<name>.<base-domain>` (DNS-säkrad label).
 - Fail-closed:
   - disable blockeras om IP används av minst en container,
   - delete blockeras om posten är enabled eller used,
-  - disable/delete blockeras om Docker-usage inte kan verifieras.
+  - disable/delete blockeras om Docker-usage inte kan verifieras,
+  - state-ändringar blockeras om nödvändig DNS-synk misslyckas.
 - Startup reconcile: enabled-poster återappliceras vid appstart.
-- Manuell refresh-knapp (ingen websocket i v1).
+- DNS reconcile körs i bakgrunden med poll-interval.
+- Manuell refresh-knapp för UI-status (ingen websocket i v1).
 
 ## Portar
 
@@ -77,6 +81,33 @@ Viktiga environment-variabler:
   - alternativt `http://127.0.0.1:2375` för socket-proxy.
 - `DOCKER_TIMEOUT_SECONDS` (default `3`)
 - `STATE_FILE` (default `/data/entries.json`)
+- `DNS_PROVIDER` (`none`, `adguard`, `rfc2136`; default `none`)
+- `DNS_BASE_DOMAIN` (exempel: `home.arpa`)
+- `DNS_TTL_SECONDS` (default `120`)
+- `DNS_SYNC_INTERVAL_SECONDS` (default `15`)
+
+AdGuard (`DNS_PROVIDER=adguard`):
+
+- `ADGUARD_URL` (exempel: `http://127.0.0.1:3000`)
+- `ADGUARD_USERNAME`
+- `ADGUARD_PASSWORD`
+- `ADGUARD_API_TOKEN` (framtida alternativ, inte aktiv auth-väg i v1)
+
+RFC2136 (`DNS_PROVIDER=rfc2136`):
+
+- `RFC2136_SERVER`
+- `RFC2136_ZONE`
+- `RFC2136_PORT` (default `53`)
+- `RFC2136_TSIG_KEY_NAME` (valfri om osignerade updates tillåts)
+- `RFC2136_TSIG_SECRET` (base64, valfri utan TSIG)
+- `RFC2136_TSIG_ALGORITHM` (default `hmac-sha256`)
+
+## DNS-beteende
+
+- Villkor för record: endast när posten är `enabled` och `used`.
+- När posten inte längre är `used` tas DNS-record bort i bakgrundsreconcile.
+- Vid enable/disable/delete görs direkt DNS-synk och operationen failar vid synkfel (fail-closed).
+- Om Docker usage-kontroll är okänd i bakgrundsloop görs inga DNS-mutationer i den cykeln.
 
 ## Integrationstester
 
@@ -91,7 +122,9 @@ Testerna mockar Docker API och `ip`-kommandoflöde och verifierar:
 - exakt `HostIp`-matchning,
 - fail-closed disable/delete,
 - blockering vid enabled/used,
-- startup reconcile av enabled-poster.
+- startup reconcile av enabled-poster,
+- DNS create/delete på `enabled && used`,
+- fail-closed rollback vid DNS-synkfel.
 
 ## Auth-notis
 
@@ -102,4 +135,4 @@ Auth/autorisering ska implementeras i en senare version och är en uttalad roadm
 ## Roadmap (ej v1)
 
 - WebSocket-baserad live-uppdatering av used-status.
-- DNS-integration (Cloudflare/lokal DNS) kopplat till IP-poster och hostnamn.
+- Alternativ auth för AdGuard via API-token.

Apps/docker-ip-addr-manager/backend/app/config.py

@@ -10,6 +10,20 @@ class Settings:
     docker_api_url: str
     docker_timeout_seconds: float
     app_port: int
+    dns_provider: str
+    dns_base_domain: str
+    dns_ttl_seconds: int
+    dns_sync_interval_seconds: float
+    adguard_url: str
+    adguard_username: str
+    adguard_password: str
+    adguard_api_token: str
+    rfc2136_server: str
+    rfc2136_zone: str
+    rfc2136_port: int
+    rfc2136_tsig_key_name: str
+    rfc2136_tsig_secret: str
+    rfc2136_tsig_algorithm: str
 
 
 def get_settings() -> Settings:
@@ -18,4 +32,18 @@ def get_settings() -> Settings:
         docker_api_url=os.getenv("DOCKER_API_URL", "unix:///var/run/docker.sock"),
         docker_timeout_seconds=float(os.getenv("DOCKER_TIMEOUT_SECONDS", "3")),
         app_port=int(os.getenv("APP_PORT", "31810")),
+        dns_provider=os.getenv("DNS_PROVIDER", "none"),
+        dns_base_domain=os.getenv("DNS_BASE_DOMAIN", ""),
+        dns_ttl_seconds=int(os.getenv("DNS_TTL_SECONDS", "120")),
+        dns_sync_interval_seconds=float(os.getenv("DNS_SYNC_INTERVAL_SECONDS", "15")),
+        adguard_url=os.getenv("ADGUARD_URL", ""),
+        adguard_username=os.getenv("ADGUARD_USERNAME", ""),
+        adguard_password=os.getenv("ADGUARD_PASSWORD", ""),
+        adguard_api_token=os.getenv("ADGUARD_API_TOKEN", ""),
+        rfc2136_server=os.getenv("RFC2136_SERVER", ""),
+        rfc2136_zone=os.getenv("RFC2136_ZONE", ""),
+        rfc2136_port=int(os.getenv("RFC2136_PORT", "53")),
+        rfc2136_tsig_key_name=os.getenv("RFC2136_TSIG_KEY_NAME", ""),
+        rfc2136_tsig_secret=os.getenv("RFC2136_TSIG_SECRET", ""),
+        rfc2136_tsig_algorithm=os.getenv("RFC2136_TSIG_ALGORITHM", "hmac-sha256"),
     )

Apps/docker-ip-addr-manager/backend/app/dns_sync.py

@@ -0,0 +1,309 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+import base64
+import http.client
+import json
+from typing import Protocol
+from urllib.parse import urlparse
+
+
+class DnsSyncError(RuntimeError):
+    pass
+
+
+class DnsProvider(Protocol):
+    def upsert_a_record(self, fqdn: str, ip: str, ttl: int) -> None:
+        raise NotImplementedError
+
+    def delete_a_record(self, fqdn: str) -> None:
+        raise NotImplementedError
+
+
+def to_fqdn(entry_name: str, base_domain: str) -> str:
+    label = _sanitize_label(entry_name)
+    domain = base_domain.strip().lower().strip(".")
+    if not domain:
+        raise DnsSyncError("DNS_BASE_DOMAIN is required when DNS is enabled")
+    return f"{label}.{domain}"
+
+
+def _sanitize_label(value: str) -> str:
+    source = value.strip().lower()
+    if not source:
+        raise DnsSyncError("Entry name is required to create DNS record")
+
+    cleaned: list[str] = []
+    prev_dash = False
+    for ch in source:
+        if "a" <= ch <= "z" or "0" <= ch <= "9":
+            cleaned.append(ch)
+            prev_dash = False
+            continue
+        if ch in {" ", "_", "-"} and not prev_dash:
+            cleaned.append("-")
+            prev_dash = True
+
+    label = "".join(cleaned).strip("-")
+    if not label:
+        raise DnsSyncError(f"Entry name cannot produce DNS-safe label: {value!r}")
+    if len(label) > 63:
+        raise DnsSyncError("DNS label derived from entry name is too long (max 63)")
+    return label
+
+
+@dataclass(frozen=True)
+class AdguardConfig:
+    url: str
+    username: str
+    password: str
+    timeout_seconds: float
+
+
+class AdguardDnsProvider:
+    def __init__(self, config: AdguardConfig):
+        parsed = urlparse(config.url)
+        if parsed.scheme not in {"http", "https"}:
+            raise ValueError("ADGUARD_URL must use http or https")
+        if not parsed.netloc:
+            raise ValueError("ADGUARD_URL must include host")
+
+        self._https = parsed.scheme == "https"
+        self._host = parsed.hostname or "localhost"
+        self._port = parsed.port
+        self._base_path = parsed.path.rstrip("/")
+        self._username = config.username
+        self._password = config.password
+        self._timeout = config.timeout_seconds
+        self._session_cookie: str | None = None
+
+    def upsert_a_record(self, fqdn: str, ip: str, ttl: int) -> None:
+        del ttl  # AdGuard rewrite records do not expose TTL controls.
+        rewrites = self._list_rewrites()
+        for item in rewrites:
+            if item.get("domain") == fqdn and item.get("answer") == ip:
+                return
+            if item.get("domain") == fqdn and item.get("answer") != ip:
+                self._request("POST", "/control/rewrite/delete", {"domain": fqdn, "answer": item.get("answer", "")})
+        self._request("POST", "/control/rewrite/add", {"domain": fqdn, "answer": ip})
+
+    def delete_a_record(self, fqdn: str) -> None:
+        rewrites = self._list_rewrites()
+        for item in rewrites:
+            if item.get("domain") != fqdn:
+                continue
+            self._request("POST", "/control/rewrite/delete", {"domain": fqdn, "answer": item.get("answer", "")})
+
+    def _list_rewrites(self) -> list[dict]:
+        payload = self._request("GET", "/control/rewrite/list", None)
+        if not isinstance(payload, list):
+            raise DnsSyncError("AdGuard returned unexpected rewrite list format")
+        output: list[dict] = []
+        for item in payload:
+            if isinstance(item, dict):
+                output.append(item)
+        return output
+
+    def _request(self, method: str, path: str, payload: dict | None) -> object:
+        if self._session_cookie is None:
+            self._login()
+        return self._request_with_session(method, path, payload, retry_on_auth=True)
+
+    def _login(self) -> None:
+        body = {"name": self._username, "password": self._password}
+        payload, headers = self._raw_request("POST", "/control/login", body, include_auth=False)
+        if headers is None:
+            raise DnsSyncError("AdGuard login failed: missing response headers")
+        cookie = headers.get("set-cookie", "")
+        session = ""
+        for piece in cookie.split(";"):
+            piece = piece.strip()
+            if piece.startswith("agh_session="):
+                session = piece
+                break
+        if not session:
+            raise DnsSyncError("AdGuard login failed: no agh_session cookie")
+        self._session_cookie = session
+        del payload
+
+    def _request_with_session(self, method: str, path: str, payload: dict | None, retry_on_auth: bool) -> object:
+        body, _ = self._raw_request(method, path, payload, include_auth=True)
+        if isinstance(body, dict) and body.get("message") == "unauthorized":
+            if retry_on_auth:
+                self._session_cookie = None
+                self._login()
+                return self._request_with_session(method, path, payload, retry_on_auth=False)
+            raise DnsSyncError("AdGuard request unauthorized")
+        return body
+
+    def _raw_request(
+        self, method: str, path: str, payload: dict | None, include_auth: bool
+    ) -> tuple[object, dict[str, str] | None]:
+        conn: http.client.HTTPConnection | http.client.HTTPSConnection
+        if self._https:
+            conn = http.client.HTTPSConnection(self._host, self._port, timeout=self._timeout)
+        else:
+            conn = http.client.HTTPConnection(self._host, self._port, timeout=self._timeout)
+
+        request_path = f"{self._base_path}{path}"
+        raw = ""
+        headers = {"Content-Type": "application/json"}
+        if include_auth and self._session_cookie:
+            headers["Cookie"] = self._session_cookie
+        if payload is not None:
+            raw = json.dumps(payload)
+
+        try:
+            conn.request(method, request_path, body=raw, headers=headers)
+            response = conn.getresponse()
+            body_text = response.read().decode("utf-8", errors="replace")
+            response_headers = {k.lower(): v for k, v in response.getheaders()}
+        except OSError as exc:
+            raise DnsSyncError(f"AdGuard request failed for {path}: {exc}") from exc
+        finally:
+            conn.close()
+
+        if response.status < 200 or response.status >= 300:
+            raise DnsSyncError(
+                f"AdGuard request failed for {path}: HTTP {response.status} {response.reason}; body={body_text[:400]}"
+            )
+
+        if not body_text.strip():
+            return {}, response_headers
+        try:
+            return json.loads(body_text), response_headers
+        except json.JSONDecodeError:
+            return body_text, response_headers
+
+
+@dataclass(frozen=True)
+class Rfc2136Config:
+    server: str
+    zone: str
+    port: int
+    timeout_seconds: float
+    tsig_key_name: str
+    tsig_secret: str
+    tsig_algorithm: str
+
+
+class Rfc2136DnsProvider:
+    def __init__(self, config: Rfc2136Config):
+        if not config.server.strip():
+            raise ValueError("RFC2136_SERVER is required")
+        if not config.zone.strip():
+            raise ValueError("RFC2136_ZONE is required")
+
+        self._server = config.server.strip()
+        self._zone = config.zone.strip().rstrip(".")
+        self._port = config.port
+        self._timeout = config.timeout_seconds
+        self._key_name = config.tsig_key_name.strip()
+        self._secret = config.tsig_secret.strip()
+        self._algorithm = config.tsig_algorithm.strip() or "hmac-sha256"
+
+    def upsert_a_record(self, fqdn: str, ip: str, ttl: int) -> None:
+        rcode, tsigkeyring, update, query = self._dns_modules()
+        zone_text = self._zone_with_dot()
+        keyring = self._keyring_or_none(tsigkeyring)
+        target = self._absolute_name(fqdn)
+        try:
+            req = update.Update(zone_text, keyring=keyring, keyname=self._key_name or None, keyalgorithm=self._algorithm)
+            req.delete(target, "A")
+            req.add(target, int(ttl), "A", ip)
+            response = query.tcp(req, self._server, port=self._port, timeout=self._timeout)
+        except Exception as exc:  # noqa: BLE001
+            raise DnsSyncError(f"RFC2136 upsert failed for {fqdn} -> {ip}: {exc}") from exc
+        if response.rcode() != rcode.NOERROR:
+            text = rcode.to_text(response.rcode())
+            raise DnsSyncError(f"RFC2136 upsert failed for {fqdn}: {text}")
+
+    def delete_a_record(self, fqdn: str) -> None:
+        rcode, tsigkeyring, update, query = self._dns_modules()
+        zone_text = self._zone_with_dot()
+        keyring = self._keyring_or_none(tsigkeyring)
+        target = self._absolute_name(fqdn)
+        try:
+            req = update.Update(zone_text, keyring=keyring, keyname=self._key_name or None, keyalgorithm=self._algorithm)
+            req.delete(target, "A")
+            response = query.tcp(req, self._server, port=self._port, timeout=self._timeout)
+        except Exception as exc:  # noqa: BLE001
+            raise DnsSyncError(f"RFC2136 delete failed for {fqdn}: {exc}") from exc
+        if response.rcode() != rcode.NOERROR:
+            text = rcode.to_text(response.rcode())
+            raise DnsSyncError(f"RFC2136 delete failed for {fqdn}: {text}")
+
+    def _dns_modules(self):
+        try:
+            import dns.query as query
+            import dns.rcode as rcode
+            import dns.tsigkeyring as tsigkeyring
+            import dns.update as update
+        except ImportError as exc:
+            raise DnsSyncError("dnspython is required for RFC2136 mode") from exc
+        return rcode, tsigkeyring, update, query
+
+    def _keyring_or_none(self, tsigkeyring):
+        if not self._key_name and not self._secret:
+            return None
+        if not self._key_name or not self._secret:
+            raise DnsSyncError("RFC2136 TSIG requires both key name and secret")
+        key_name = self._key_name if self._key_name.endswith(".") else f"{self._key_name}."
+        try:
+            base64.b64decode(self._secret, validate=True)
+        except Exception as exc:  # noqa: BLE001
+            raise DnsSyncError("RFC2136_TSIG_SECRET must be valid base64") from exc
+        if self._algorithm not in {"hmac-sha256", "hmac-sha512", "hmac-sha1", "hmac-md5.sig-alg.reg.int"}:
+            raise DnsSyncError(f"Unsupported TSIG algorithm: {self._algorithm}")
+        return tsigkeyring.from_text({key_name: self._secret})
+
+    def _zone_with_dot(self) -> str:
+        return self._zone if self._zone.endswith(".") else f"{self._zone}."
+
+    def _absolute_name(self, fqdn: str) -> str:
+        return fqdn if fqdn.endswith(".") else f"{fqdn}."
+
+
+def build_dns_provider(
+    provider_name: str,
+    *,
+    adguard_url: str,
+    adguard_username: str,
+    adguard_password: str,
+    rfc2136_server: str,
+    rfc2136_zone: str,
+    rfc2136_port: int,
+    rfc2136_tsig_key_name: str,
+    rfc2136_tsig_secret: str,
+    rfc2136_tsig_algorithm: str,
+    timeout_seconds: float,
+) -> DnsProvider | None:
+    mode = provider_name.strip().lower()
+    if not mode or mode == "none":
+        return None
+    if mode == "adguard":
+        if not adguard_url.strip():
+            raise DnsSyncError("ADGUARD_URL is required for DNS_PROVIDER=adguard")
+        if not adguard_username.strip() or not adguard_password.strip():
+            raise DnsSyncError("ADGUARD_USERNAME and ADGUARD_PASSWORD are required for DNS_PROVIDER=adguard")
+        return AdguardDnsProvider(
+            AdguardConfig(
+                url=adguard_url,
+                username=adguard_username,
+                password=adguard_password,
+                timeout_seconds=timeout_seconds,
+            )
+        )
+    if mode == "rfc2136":
+        return Rfc2136DnsProvider(
+            Rfc2136Config(
+                server=rfc2136_server,
+                zone=rfc2136_zone,
+                port=rfc2136_port,
+                timeout_seconds=timeout_seconds,
+                tsig_key_name=rfc2136_tsig_key_name,
+                tsig_secret=rfc2136_tsig_secret,
+                tsig_algorithm=rfc2136_tsig_algorithm,
+            )
+        )
+    raise DnsSyncError(f"Unsupported DNS_PROVIDER: {provider_name}")

Apps/docker-ip-addr-manager/backend/app/main.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 from pathlib import Path
+import threading
 
 from fastapi import FastAPI, HTTPException
 from fastapi.responses import FileResponse, JSONResponse
@@ -8,6 +9,7 @@ from fastapi.staticfiles import StaticFiles
 
 from app.config import get_settings
 from app.docker_api import DockerApiClient, DockerApiError, DockerUsageResolver
+from app.dns_sync import DnsSyncError, build_dns_provider
 from app.ip_commands import CommandError, IpAddressManager
 from app.service import (
     ConflictError,
@@ -25,11 +27,34 @@ def build_service() -> EntryService:
     docker_client = DockerApiClient(settings.docker_api_url, timeout_seconds=settings.docker_timeout_seconds)
     usage_resolver = DockerUsageResolver(docker_client)
     ip_manager = IpAddressManager()
-    return EntryService(storage=storage, usage_resolver=usage_resolver, ip_manager=ip_manager)
+    dns_provider = build_dns_provider(
+        settings.dns_provider,
+        adguard_url=settings.adguard_url,
+        adguard_username=settings.adguard_username,
+        adguard_password=settings.adguard_password,
+        rfc2136_server=settings.rfc2136_server,
+        rfc2136_zone=settings.rfc2136_zone,
+        rfc2136_port=settings.rfc2136_port,
+        rfc2136_tsig_key_name=settings.rfc2136_tsig_key_name,
+        rfc2136_tsig_secret=settings.rfc2136_tsig_secret,
+        rfc2136_tsig_algorithm=settings.rfc2136_tsig_algorithm,
+        timeout_seconds=settings.docker_timeout_seconds,
+    )
+    return EntryService(
+        storage=storage,
+        usage_resolver=usage_resolver,
+        ip_manager=ip_manager,
+        dns_provider=dns_provider,
+        dns_base_domain=settings.dns_base_domain,
+        dns_ttl_seconds=settings.dns_ttl_seconds,
+    )
 
 
 service = build_service()
 app = FastAPI(title="Docker IP Addr Manager", version="0.1.0")
+settings = get_settings()
+stop_event = threading.Event()
+background_thread: threading.Thread | None = None
 
 static_dir = Path(__file__).parent / "static"
 app.mount("/static", StaticFiles(directory=static_dir), name="static")
@@ -41,6 +66,39 @@ def startup_reconcile() -> None:
     if errors:
         for error in errors:
             print(f"[startup-reconcile] {error}")
+    dns_errors = service.reconcile_dns_records()
+    if dns_errors:
+        for error in dns_errors:
+            print(f"[dns-reconcile-startup] {error}")
+    _start_dns_background_loop()
+
+
+@app.on_event("shutdown")
+def shutdown_reconcile() -> None:
+    stop_event.set()
+    if background_thread and background_thread.is_alive():
+        background_thread.join(timeout=2.0)
+
+
+def _dns_background_worker(interval_seconds: float) -> None:
+    while not stop_event.wait(interval_seconds):
+        errors = service.reconcile_dns_records()
+        for error in errors:
+            print(f"[dns-reconcile] {error}")
+
+
+def _start_dns_background_loop() -> None:
+    global background_thread
+    if settings.dns_provider.strip().lower() in {"", "none"}:
+        return
+    if background_thread and background_thread.is_alive():
+        return
+    background_thread = threading.Thread(
+        target=_dns_background_worker,
+        args=(max(settings.dns_sync_interval_seconds, 1.0),),
+        daemon=True,
+    )
+    background_thread.start()
 
 
 @app.get("/")
@@ -139,3 +197,8 @@ def delete_entry(entry_id: str) -> dict:
 @app.exception_handler(DockerApiError)
 async def docker_error_handler(_, exc: DockerApiError):
     return JSONResponse(status_code=503, content={"detail": str(exc)})
+
+
+@app.exception_handler(DnsSyncError)
+async def dns_error_handler(_, exc: DnsSyncError):
+    return JSONResponse(status_code=503, content={"detail": str(exc)})

Apps/docker-ip-addr-manager/backend/app/models.py

@@ -46,6 +46,8 @@ class EntryView:
     used: bool
     containers: list[str]
     usage_known: bool
+    dns_desired: bool = False
+    dns_last_error: str | None = None
 
     def to_dict(self) -> dict:
         return {
@@ -59,4 +61,6 @@ class EntryView:
             "used": self.used,
             "containers": self.containers,
             "usage_known": self.usage_known,
+            "dns_desired": self.dns_desired,
+            "dns_last_error": self.dns_last_error,
         }

Apps/docker-ip-addr-manager/backend/app/service.py

@@ -7,6 +7,7 @@ from typing import Callable
 from uuid import uuid4
 
 from app.docker_api import DockerApiError, DockerUsageResolver
+from app.dns_sync import DnsProvider, DnsSyncError, to_fqdn
 from app.interfaces import list_host_interfaces
 from app.ip_commands import CommandError, IpAddressManager
 from app.models import EntryView, IpEntry
@@ -50,12 +51,19 @@ class EntryService:
         usage_resolver: DockerUsageResolver,
         ip_manager: IpAddressManager,
         interface_provider: Callable[[], list[str]] = list_host_interfaces,
+        dns_provider: DnsProvider | None = None,
+        dns_base_domain: str = "",
+        dns_ttl_seconds: int = 120,
     ):
         self._storage = storage
         self._usage_resolver = usage_resolver
         self._ip_manager = ip_manager
         self._interface_provider = interface_provider
+        self._dns_provider = dns_provider
+        self._dns_base_domain = dns_base_domain
+        self._dns_ttl_seconds = dns_ttl_seconds
         self._lock = threading.Lock()
+        self._dns_errors_by_id: dict[str, str] = {}
 
     def list_interfaces(self) -> list[str]:
         interfaces = self._interface_provider()
@@ -89,6 +97,8 @@ class EntryService:
                     used=used,
                     containers=containers,
                     usage_known=usage_known,
+                    dns_desired=bool(self._dns_provider) and usage_known and used and entry.enabled,
+                    dns_last_error=self._dns_errors_by_id.get(entry.id),
                 )
             )
 
@@ -100,6 +110,7 @@ class EntryService:
             entries = self._storage.list_entries()
             self._assert_device_exists(parsed["device"])
             self._assert_unique_binding(entries, ip=parsed["ip"], cidr=parsed["cidr"], device=parsed["device"])
+            self._assert_unique_name(entries, name=parsed["name"])
 
             created = IpEntry(
                 id=uuid4().hex,
@@ -129,6 +140,7 @@ class EntryService:
                 device=parsed["device"],
                 ignore_entry_id=entry_id,
             )
+            self._assert_unique_name(entries, name=parsed["name"], ignore_entry_id=entry_id)
             updated = IpEntry(
                 id=current.id,
                 name=parsed["name"],
@@ -145,6 +157,7 @@ class EntryService:
         with self._lock:
             entries = self._storage.list_entries()
             index, entry = _find_entry(entries, entry_id)
+            previous_enabled = entry.enabled
 
             if enabled:
                 self._ip_manager.ensure_present(entry.ip, entry.cidr, entry.device)
@@ -154,6 +167,12 @@ class EntryService:
                 self._ip_manager.ensure_absent(entry.ip, entry.cidr, entry.device)
                 entry.enabled = False
 
+            try:
+                self._sync_dns_for_entry_locked(entry, strict=True)
+            except Exception:  # noqa: BLE001
+                self._rollback_enable_change(entry, previous_enabled)
+                raise
+
             entries[index] = entry
             self._storage.save_entries(entries)
             return entry
@@ -166,8 +185,10 @@ class EntryService:
                 raise ConflictError("Disable entry before deleting")
 
             self._assert_not_used(entry)
+            self._delete_dns_for_entry_locked(entry, strict=True)
             remaining = [candidate for candidate in entries if candidate.id != entry_id]
             self._storage.save_entries(remaining)
+            self._dns_errors_by_id.pop(entry.id, None)
 
     def reconcile_enabled_entries(self) -> list[str]:
         errors: list[str] = []
@@ -186,6 +207,84 @@ class EntryService:
                 self._storage.save_entries(entries)
         return errors
 
+    def reconcile_dns_records(self) -> list[str]:
+        if not self._dns_provider:
+            return []
+
+        errors: list[str] = []
+        with self._lock:
+            entries = self._storage.list_entries()
+            usage_map, usage_known, usage_error = self._resolve_usage(entries)
+            if not usage_known:
+                msg = f"Docker usage check failed for DNS reconcile: {usage_error or 'unknown error'}"
+                for entry in entries:
+                    self._dns_errors_by_id[entry.id] = msg
+                return [msg]
+
+            for entry in entries:
+                used = bool(usage_map.get(entry.ip, set()))
+                desired = entry.enabled and used
+                try:
+                    self._apply_dns_state_locked(entry, desired)
+                    self._dns_errors_by_id.pop(entry.id, None)
+                except (DnsSyncError, DependencyError, ConflictError) as exc:
+                    self._dns_errors_by_id[entry.id] = str(exc)
+                    errors.append(f"{entry.name}: {exc}")
+        return errors
+
+    def _rollback_enable_change(self, entry: IpEntry, previous_enabled: bool) -> None:
+        try:
+            if previous_enabled:
+                self._ip_manager.ensure_present(entry.ip, entry.cidr, entry.device)
+                entry.enabled = True
+            else:
+                self._ip_manager.ensure_absent(entry.ip, entry.cidr, entry.device)
+                entry.enabled = False
+        except CommandError:
+            pass
+
+    def _sync_dns_for_entry_locked(self, entry: IpEntry, strict: bool) -> None:
+        if not self._dns_provider:
+            return
+
+        usage_map, usage_known, usage_error = self._resolve_usage([entry])
+        if not usage_known:
+            msg = f"Docker usage check failed: {usage_error or 'unknown error'}"
+            self._dns_errors_by_id[entry.id] = msg
+            if strict:
+                raise DependencyError(msg)
+            return
+
+        desired = entry.enabled and bool(usage_map.get(entry.ip, set()))
+        self._apply_dns_state_locked(entry, desired)
+        self._dns_errors_by_id.pop(entry.id, None)
+
+    def _delete_dns_for_entry_locked(self, entry: IpEntry, strict: bool) -> None:
+        if not self._dns_provider:
+            return
+
+        try:
+            fqdn = to_fqdn(entry.name, self._dns_base_domain)
+            self._dns_provider.delete_a_record(fqdn)
+            self._dns_errors_by_id.pop(entry.id, None)
+        except DnsSyncError as exc:
+            self._dns_errors_by_id[entry.id] = str(exc)
+            if strict:
+                raise ConflictError(f"DNS delete failed for {entry.name}: {exc}") from exc
+
+    def _apply_dns_state_locked(self, entry: IpEntry, desired: bool) -> None:
+        if not self._dns_provider:
+            return
+
+        try:
+            fqdn = to_fqdn(entry.name, self._dns_base_domain)
+            if desired:
+                self._dns_provider.upsert_a_record(fqdn, entry.ip, self._dns_ttl_seconds)
+            else:
+                self._dns_provider.delete_a_record(fqdn)
+        except DnsSyncError as exc:
+            raise ConflictError(f"DNS sync failed for {entry.name}: {exc}") from exc
+
     def _assert_not_used(self, entry: IpEntry) -> None:
         try:
             usage = self._usage_resolver.resolve_ip_usage({entry.ip})
@@ -223,6 +322,14 @@ class EntryService:
             if entry.ip == ip and entry.cidr == cidr and entry.device == device:
                 raise ConflictError("Entry with same ip/cidr/device already exists")
 
+    def _assert_unique_name(self, entries: list[IpEntry], name: str, ignore_entry_id: str | None = None) -> None:
+        target = name.strip().lower()
+        for entry in entries:
+            if ignore_entry_id and entry.id == ignore_entry_id:
+                continue
+            if entry.name.strip().lower() == target:
+                raise ConflictError("Entry name must be unique")
+
     def _assert_device_exists(self, device: str) -> None:
         interfaces = self.list_interfaces()
         if device not in interfaces:
@@ -258,15 +365,15 @@ def _parse_payload(payload: dict) -> dict:
     if any(ch.isspace() for ch in device):
         raise ValidationError("Field 'device' cannot contain whitespace")
 
-    raw_cidr = payload.get("cidr")
-    if raw_cidr is None:
+    cidr_raw = payload.get("cidr")
+    if cidr_raw is None:
         raise ValidationError("Field 'cidr' is required")
     try:
-        cidr = int(raw_cidr)
+        cidr = int(cidr_raw)
     except (TypeError, ValueError) as exc:
         raise ValidationError("Field 'cidr' must be an integer") from exc
     if cidr < 0 or cidr > 32:
-        raise ValidationError("Field 'cidr' must be in range 0..32")
+        raise ValidationError("Field 'cidr' must be between 0 and 32")
 
     return {
         "name": name,

Apps/docker-ip-addr-manager/backend/requirements.txt

@@ -1,2 +1,3 @@
 fastapi==0.116.1
 uvicorn==0.35.0
+dnspython==2.7.0

Apps/docker-ip-addr-manager/docker-compose.yaml

@@ -19,6 +19,20 @@ services:
       STATE_FILE: /data/entries.json
       DOCKER_API_URL: unix:///var/run/docker.sock
       DOCKER_TIMEOUT_SECONDS: "3"
+      DNS_PROVIDER: none
+      DNS_BASE_DOMAIN: home.arpa
+      DNS_TTL_SECONDS: "120"
+      DNS_SYNC_INTERVAL_SECONDS: "15"
+      ADGUARD_URL: http://127.0.0.1:3000
+      ADGUARD_USERNAME: ""
+      ADGUARD_PASSWORD: ""
+      ADGUARD_API_TOKEN: ""
+      RFC2136_SERVER: ""
+      RFC2136_ZONE: ""
+      RFC2136_PORT: "53"
+      RFC2136_TSIG_KEY_NAME: ""
+      RFC2136_TSIG_SECRET: ""
+      RFC2136_TSIG_ALGORITHM: hmac-sha256
     volumes:
       - type: bind
         source: /DATA/AppData/$AppID/data
@@ -38,6 +52,33 @@ services:
         - container: DOCKER_TIMEOUT_SECONDS
           description:
             en_us: Timeout in seconds for Docker API requests
+        - container: DNS_PROVIDER
+          description:
+            en_us: DNS backend (none, adguard, rfc2136)
+        - container: DNS_BASE_DOMAIN
+          description:
+            en_us: Base domain for generated hostnames like <name>.<domain>
+        - container: DNS_TTL_SECONDS
+          description:
+            en_us: TTL in seconds for DNS A records
+        - container: DNS_SYNC_INTERVAL_SECONDS
+          description:
+            en_us: Background DNS reconcile interval in seconds
+        - container: ADGUARD_URL
+          description:
+            en_us: AdGuard Home URL for DNS_PROVIDER=adguard
+        - container: ADGUARD_USERNAME
+          description:
+            en_us: AdGuard Home username for DNS_PROVIDER=adguard
+        - container: ADGUARD_PASSWORD
+          description:
+            en_us: AdGuard Home password for DNS_PROVIDER=adguard
+        - container: RFC2136_SERVER
+          description:
+            en_us: RFC2136 nameserver host or IP
+        - container: RFC2136_ZONE
+          description:
+            en_us: RFC2136 zone name (for example home.arpa)
       volumes:
         - container: /data
           description:
@@ -91,7 +132,7 @@ x-casaos:
       be validated.
       Start by adding a new IP Entry in this app and connect it to the appropriate Device.
       Then install, or update, a zima app and choose network: bridge.
-      * Enter a name for the app, will be used to create dns records in future release, add a non-used IP Address, CIDR, and choose device
+      * Enter a name for the app, and the app can create DNS records as <name>.<DNS_BASE_DOMAIN> when DNS sync is enabled
       * Click add, and a new row appears under.
       * Click "Enable" to have this app setup the host to listen to this IP Address
       * To to the ZimaOS App Store, choose an app, and do a "Custom Install"

Apps/docker-ip-addr-manager/tests/integration_tests.py

@@ -11,6 +11,7 @@ BACKEND_DIR = ROOT_DIR / "backend"
 sys.path.insert(0, str(BACKEND_DIR))
 
 from app.docker_api import DockerApiError, DockerUsageResolver
+from app.dns_sync import DnsSyncError
 from app.models import IpEntry
 from app.service import ConflictError, DependencyError, EntryService
 from app.storage import EntryStorage
@@ -75,12 +76,40 @@ class FakeIpManager:
         self.present.discard((ip, cidr, device))
 
 
+class FakeDnsProvider:
+    def __init__(self, fail_upsert=False, fail_delete=False):
+        self.records = {}
+        self.upserts = []
+        self.deletes = []
+        self.fail_upsert = fail_upsert
+        self.fail_delete = fail_delete
+
+    def upsert_a_record(self, fqdn: str, ip: str, ttl: int):
+        if self.fail_upsert:
+            raise DnsSyncError("upsert failed")
+        self.records[fqdn] = ip
+        self.upserts.append((fqdn, ip, ttl))
+
+    def delete_a_record(self, fqdn: str):
+        if self.fail_delete:
+            raise DnsSyncError("delete failed")
+        self.records.pop(fqdn, None)
+        self.deletes.append(fqdn)
+
+
 def assert_true(condition, message):
     if not condition:
         raise AssertionError(message)
 
 
-def build_service(tmp_path: Path, entries=None, usage_resolver=None, ip_manager=None):
+def build_service(
+    tmp_path: Path,
+    entries=None,
+    usage_resolver=None,
+    ip_manager=None,
+    dns_provider=None,
+    dns_base_domain="home.arpa",
+):
     storage = EntryStorage(str(tmp_path / "entries.json"))
     if entries:
         storage.save_entries(entries)
@@ -93,6 +122,9 @@ def build_service(tmp_path: Path, entries=None, usage_resolver=None, ip_manager=
         usage_resolver=resolver,
         ip_manager=ipm,
         interface_provider=lambda: ["eth0", "eth1"],
+        dns_provider=dns_provider,
+        dns_base_domain=dns_base_domain,
+        dns_ttl_seconds=120,
     )
 
 
@@ -163,6 +195,79 @@ def test_reconcile_reapplies_enabled(tmp_path: Path):
     assert_true(("10.0.4.10", 16, "eth0") in ip_manager.present, "enabled IP must be re-applied on startup reconcile")
 
 
+def test_dns_upsert_on_enable_when_used(tmp_path: Path):
+    entry = IpEntry(id="dns1", name="Lan App", ip="10.0.4.20", cidr=16, device="eth0", enabled=False)
+    resolver = FakeUsageResolver(mapping={"10.0.4.20": {"nginx"}})
+    ip_manager = FakeIpManager()
+    dns = FakeDnsProvider()
+    service = build_service(tmp_path, entries=[entry], usage_resolver=resolver, ip_manager=ip_manager, dns_provider=dns)
+
+    service.set_enabled("dns1", enabled=True)
+
+    assert_true(dns.records.get("lan-app.home.arpa") == "10.0.4.20", "DNS record should be created on enable+used")
+
+
+def test_dns_no_upsert_on_enable_when_unused(tmp_path: Path):
+    entry = IpEntry(id="dns2", name="Lan App 2", ip="10.0.4.21", cidr=16, device="eth0", enabled=False)
+    resolver = FakeUsageResolver(mapping={})
+    ip_manager = FakeIpManager()
+    dns = FakeDnsProvider()
+    service = build_service(tmp_path, entries=[entry], usage_resolver=resolver, ip_manager=ip_manager, dns_provider=dns)
+
+    service.set_enabled("dns2", enabled=True)
+
+    assert_true("lan-app-2.home.arpa" not in dns.records, "Unused entries must not create DNS record")
+
+
+def test_dns_reconcile_deletes_when_no_longer_used(tmp_path: Path):
+    entry = IpEntry(id="dns3", name="Lan App 3", ip="10.0.4.22", cidr=16, device="eth0", enabled=True)
+    resolver = FakeUsageResolver(mapping={"10.0.4.22": {"nginx"}})
+    dns = FakeDnsProvider()
+    service = build_service(tmp_path, entries=[entry], usage_resolver=resolver, dns_provider=dns)
+
+    service.reconcile_dns_records()
+    assert_true(dns.records.get("lan-app-3.home.arpa") == "10.0.4.22", "record should exist after used reconcile")
+
+    resolver._mapping = {}
+    service.reconcile_dns_records()
+    assert_true("lan-app-3.home.arpa" not in dns.records, "record should be removed when usage disappears")
+
+
+def test_dns_fail_closed_rolls_back_enable(tmp_path: Path):
+    entry = IpEntry(id="dns4", name="Lan App 4", ip="10.0.4.23", cidr=16, device="eth0", enabled=False)
+    resolver = FakeUsageResolver(mapping={"10.0.4.23": {"nginx"}})
+    ip_manager = FakeIpManager()
+    dns = FakeDnsProvider(fail_upsert=True)
+    service = build_service(tmp_path, entries=[entry], usage_resolver=resolver, ip_manager=ip_manager, dns_provider=dns)
+
+    failed = False
+    try:
+        service.set_enabled("dns4", enabled=True)
+    except ConflictError:
+        failed = True
+
+    assert_true(failed, "enable must fail-closed when DNS upsert fails")
+    current = service.list_entries().items[0]
+    assert_true(not current.enabled, "entry must roll back to disabled on DNS failure")
+    assert_true(not ip_manager.is_present("10.0.4.23", 16, "eth0"), "IP presence must roll back on DNS failure")
+
+
+def test_dns_fail_closed_blocks_delete(tmp_path: Path):
+    entry = IpEntry(id="dns5", name="Lan App 5", ip="10.0.4.24", cidr=16, device="eth0", enabled=False)
+    resolver = FakeUsageResolver(mapping={})
+    dns = FakeDnsProvider(fail_delete=True)
+    service = build_service(tmp_path, entries=[entry], usage_resolver=resolver, dns_provider=dns)
+
+    failed = False
+    try:
+        service.delete_entry("dns5")
+    except ConflictError:
+        failed = True
+
+    assert_true(failed, "delete must fail-closed when DNS cleanup fails")
+    assert_true(len(service.list_entries().items) == 1, "entry must remain when delete fails")
+
+
 def main():
     test_exact_hostip_match_only()
 
@@ -172,6 +277,11 @@ def main():
         test_disable_blocked_when_docker_check_fails(tmp_path)
         test_delete_blocked_when_enabled(tmp_path)
         test_reconcile_reapplies_enabled(tmp_path)
+        test_dns_upsert_on_enable_when_used(tmp_path)
+        test_dns_no_upsert_on_enable_when_unused(tmp_path)
+        test_dns_reconcile_deletes_when_no_longer_used(tmp_path)
+        test_dns_fail_closed_rolls_back_enable(tmp_path)
+        test_dns_fail_closed_blocks_delete(tmp_path)
 
     print("Integration tests passed")
 

Apps/snacks/README.md

@@ -0,0 +1,143 @@
+# Snacks
+
+Automated video library encoder with hardware acceleration (NVENC, QSV, VAAPI, AMF).
+
+## Purpose
+
+Snacks batch-transcodes video libraries using FFmpeg with hardware acceleration.
+It monitors directories, skips already-encoded files, retries with fallbacks, and supports distributed cluster encoding across multiple ZimaOS nodes.
+
+## Port
+
+- `6767/tcp` — Web UI at `http://localhost:6767`
+
+## Volumes
+
+| Host path | Container path | Description |
+|---|---|---|
+| `/DATA/AppData/$AppID/media` | `/app/work/uploads` | Media library — source files to encode |
+| `/DATA/AppData/$AppID/logs` | `/app/work/logs` | Transcoding logs |
+| `/DATA/AppData/$AppID/config` | `/app/work/config` | Settings and SQLite database |
+
+## Hardware Acceleration
+
+Snacks uses GPU encoding via `/dev/dri`:
+
+| Driver | Codecs | Devices |
+|---|---|---|
+| VAAPI (Linux) | H.265, H.264 | Intel iHD/i965, AMD VAAPI |
+| QSV (Intel) | H.265, H.264 | Intel Quick Sync Video |
+| NVENC (NVIDIA) | H.265, H.264 | NVIDIA GPUs via CUDA |
+| AMF (AMD) | H.265, H.264 | AMD GPUs |
+
+Auto-detection runs on first encode and picks the best available encoder.
+
+## Cluster Mode
+
+Snacks supports distributed encoding across multiple ZimaOS nodes.
+
+- Nodes discover each other via UDP broadcast on the LAN
+- One instance acts as coordinator; others are workers
+- Jobs are assigned automatically; failed nodes are re-assigned
+- A shared secret authenticates intra-cluster communication
+
+**UDP broadcast requirement**: Cluster mode requires `network_mode: host` — bridge mode blocks LAN broadcast discovery, making nodes invisible to each other.
+
+## Health Check
+
+`http://localhost:6767/Home/Health` — returns HTTP 200 when the backend is ready.
+
+## Privilegier och säkerhet
+
+Aktiva säkerhetsinställningar i denna app:
+
+- `security_opt: ["no-new-privileges:true"]`
+- `cap_drop: ["ALL"]`
+- `privileged: true`
+- `network_mode: host`
+- Device mount: `/dev/dri:/dev/dri`
+
+Motivering:
+
+- `no-new-privileges:true` och `cap_drop: ["ALL"]` kompenserar med lägsta möjliga capability-yta.
+- Isolerad data-path under `/DATA/AppData/$AppID/...`.
+
+## Säkerhetsavvikelser
+
+### 1. `network_mode: host`
+
+**Varför det behövs:**
+
+- Snacks cluster nodes discover each other via UDP broadcast on the local network.
+- Bridge mode only forwards unicast traffic; broadcast packets never reach other nodes.
+- Without host networking, cluster mode is non-functional.
+
+**Alternativ som utvärderats:**
+
+- Bridge mode with port exposure: broadcasts are not forwarded by the Docker bridge.
+- Static IP configuration: requires manual node addressing and is error-prone.
+- Multicast DNS (mDNS): not supported by Docker bridge in all deployments.
+
+**Risker:**
+
+- Container has full access to all host ports.
+- No network isolation between Snacks and other services on the host.
+- If the container is compromised, the attacker has host network access.
+
+**Riskreducering:**
+
+- `cap_drop: ["ALL"]` minimizes syscall surface.
+- `no-new-privileges:true` prevents privilege escalation.
+- No sensitive host directories are mounted beyond the app-specific volumes.
+
+---
+
+### 2. `privileged: true`
+
+**Varför det behävs:**
+
+- `/dev/dri` (Direct Rendering Infrastructure) is required for VAAPI/QSV hardware acceleration.
+- On standard Linux, this device is accessible without privileged mode if the user is in the `video` or `render` group.
+- ZimaOS does not reliably provide these groups in the container runtime context, making `privileged: true` the only reliable way to grant device access.
+
+**Alternativ som utvärderats:**
+
+- `security_opt: ["apparmor:..."]` with specific `/dev/dri` access: not reliably portable across ZimaOS kernel configurations.
+- Pre-create device nodes with specific permissions: does not work dynamically when the device appears.
+- Skip hardware acceleration (software encoding only): defeats the primary purpose of the app.
+
+**Risker:**
+
+- Container has full root capabilities on the host.
+- If container is compromised, attacker has theoretical access to all host resources.
+- Hardware acceleration devices can be accessed directly.
+
+**Riskreducering:**
+
+- `cap_drop: ["ALL"]` drops all capabilities even when privileged.
+- Only the specific `/dev/dri` device is mounted; no other host devices.
+- Data volumes are scoped to `/DATA/AppData/$AppID/...`.
+
+---
+
+### 3. Device mount: `/dev/dri:/dev/dri`
+
+**Varför det behövs:**
+
+- VAAPI and QSV hardware encoding require direct access to the GPU render nodes in `/dev/dri`.
+- Without this mount, FFmpeg falls back to software encoding which is 10–50x slower on 4K content.
+
+**Alternativ som utvärderats:**
+
+- Specific device nodes (e.g., `/dev/dri/renderD128`): device names can vary by driver version and host kernel.
+- No hardware acceleration: software fallback is too slow for practical use.
+
+**Risker:**
+
+- The container can enumerate and use all graphics devices on the host.
+- On multi-user systems, other users' GPU resources may be accessible.
+
+**Riskreducering:**
+
+- `privileged: true` combined with `cap_drop: ["ALL"]` ensures the container cannot load additional kernel modules or escalate privileges.
+- Only the render nodes are exposed; no other host devices are passed through.

Apps/snacks/docker-compose.yaml

@@ -0,0 +1,103 @@
+name: snacks
+
+services:
+  snacks:
+    image: derekshreds/snacks-docker:2.3.1
+    container_name: snacks
+    restart: unless-stopped
+    deploy:
+      resources:
+        reservations:
+          memory: 1G
+
+    environment:
+      - TZ=Europe/Stockholm
+      - PUID=1000
+      - PGID=1000
+      - ASPNETCORE_ENVIRONMENT=Production
+      - SNACKS_WORK_DIR=/app/work
+      - FFMPEG_PATH=/usr/lib/jellyfin-ffmpeg/ffmpeg
+      - FFPROBE_PATH=/usr/lib/jellyfin-ffmpeg/ffprobe
+
+    network_mode: host
+
+    volumes:
+      - type: bind
+        source: /DATA/AppData/$AppID/media
+        target: /app/work/uploads
+      - type: bind
+        source: /DATA/AppData/$AppID/logs
+        target: /app/work/logs
+      - type: bind
+        source: /DATA/AppData/$AppID/config
+        target: /app/work/config
+
+    devices:
+      - /dev/dri:/dev/dri
+
+    privileged: true
+
+    security_opt:
+      - no-new-privileges:true
+
+    cap_drop:
+      - ALL
+
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:6767/Home/Health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 40s
+
+    x-casaos:
+      envs:
+        - container: TZ
+          description:
+            en_US: Timezone, for example Europe/Stockholm
+        - container: PUID
+          description:
+            en_US: User ID for filesystem permissions
+        - container: PGID
+          description:
+            en_US: Group ID for filesystem permissions
+        - container: FFMPEG_PATH
+          description:
+            en_US: "FFmpeg binary path (default: /usr/lib/jellyfin-ffmpeg/ffmpeg). Use /usr/bin/ffmpeg on systems without jellyfin-ffmpeg."
+        - container: FFPROBE_PATH
+          description:
+            en_US: "FFprobe binary path (default: /usr/lib/jellyfin-ffmpeg/ffprobe). Use /usr/bin/ffprobe on systems without jellyfin-ffmpeg."
+      ports:
+        - container: "6767"
+          description:
+            en_US: Web UI port
+      volumes:
+        - container: /app/work/uploads
+          description:
+            en_US: Media library — source files to be encoded
+        - container: /app/work/logs
+          description:
+            en_US: Transcoding logs directory
+        - container: /app/work/config
+          description:
+            en_US: Application configuration and SQLite database
+
+x-casaos:
+  architectures:
+    - amd64
+  main: snacks
+  category: phirna
+  author: Joachim Friberg
+  developer: Joachim Friberg
+  icon: https://cdn.simpleicons.org/snacks
+  tagline:
+    en_US: Automated video library encoder with hardware acceleration
+  description:
+    en_US: >-
+      Batch transcode your video library with hardware acceleration (NVENC, QSV, VAAPI, AMF).
+      Monitors directories, skips already-encoded files, and supports distributed cluster encoding.
+      Web UI at http://localhost:6767
+  title:
+    en_US: Snacks
+  index: /
+  port_map: "6767"