fix(deploy): network_mode: host (#34)

The shared postgis container is bound to 127.0.0.1 on the host (security
hardening, infrastructure §T12). Ollama is similarly LAN-hardened. The
previous `host.docker.internal + extra_hosts: host-gateway` approach
points at the bridge gateway IP, not loopback, so the container couldn't
reach either service.

Switch to `network_mode: host` (same pattern goldstein uses) and update
the default IX_POSTGRES_URL / IX_OLLAMA_URL to 127.0.0.1. Keep the GPU
reservation block; drop the now-meaningless ports: declaration (host mode
publishes directly).

AppConfig defaults + .env.example + test_config assertions + inline
docstring examples all follow.

Caught on fourth deploy attempt.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.env.example

@@ -4,10 +4,10 @@
 # the Postgres password.
 
 # --- Job store -----------------------------------------------------------
-IX_POSTGRES_URL=postgresql+asyncpg://infoxtractor:<password>@host.docker.internal:5431/infoxtractor
+IX_POSTGRES_URL=postgresql+asyncpg://infoxtractor:<password>@127.0.0.1:5431/infoxtractor
 
 # --- LLM backend ---------------------------------------------------------
-IX_OLLAMA_URL=http://host.docker.internal:11434
+IX_OLLAMA_URL=http://127.0.0.1:11434
 IX_DEFAULT_MODEL=qwen3:14b
 
 # --- OCR -----------------------------------------------------------------

docker-compose.yml

@@ -1,22 +1,21 @@
 # InfoXtractor Docker Compose stack.
 #
-# Single service. Postgres + Ollama live in separate long-running
-# containers on the host (postgis + ollama); we reach them via
-# `host.docker.internal`, which is mapped to the gateway through
-# `extra_hosts` so the container works whether the Compose plugin version
-# adds it automatically or not.
+# Single service. Uses host networking so the container can reach:
+#   - Ollama at 127.0.0.1:11434
+#   - postgis at 127.0.0.1:5431 (bound to loopback only; security hardening)
+# Both services are LAN-hardened on the host and never exposed publicly,
+# so host-network access stays on-prem. This matches the `goldstein`
+# container pattern on the same server.
 #
-# The GPU reservation block matches the shape used by immich-ml /
-# monitoring on the same host, so the existing NVIDIA runtime
-# configuration applies without changes.
+# The GPU reservation block matches immich-ml / the shape Docker Compose
+# expects for GPU allocation on this host.
 
 services:
   infoxtractor:
     build: .
     container_name: infoxtractor
+    network_mode: host
     restart: always
-    ports:
-      - "8994:8994"
     env_file: .env
     deploy:
       resources:
@@ -30,5 +29,3 @@ services:
       backup.enable: "true"
       backup.type: "postgres"
       backup.name: "infoxtractor"
-    extra_hosts:
-      - "host.docker.internal:host-gateway"

docs/deployment.md

@@ -14,8 +14,8 @@ Mac (dev)
   │                 curl /healthz (60 s gate)
   ▼
 Docker container `infoxtractor` (port 8994)
-  ├─ host.docker.internal:11434  →  Ollama (qwen3:14b)
-  └─ host.docker.internal:5431   →  postgis (database `infoxtractor`)
+  ├─ 127.0.0.1:11434  →  Ollama (qwen3:14b; host-network mode)
+  └─ 127.0.0.1:5431   →  postgis (database `infoxtractor`; host-network mode)
 ```
 
 ## One-time server setup

src/ix/config.py

@@ -33,13 +33,16 @@ class AppConfig(BaseSettings):
     )
 
     # --- Job store ---
+    # Defaults assume the ix container runs with `network_mode: host` and
+    # reaches the shared `postgis` and `ollama` containers on loopback;
+    # spec §11 / docker-compose.yml ship that configuration.
     postgres_url: str = (
         "postgresql+asyncpg://infoxtractor:<password>"
-        "@host.docker.internal:5431/infoxtractor"
+        "@127.0.0.1:5431/infoxtractor"
     )
 
     # --- LLM backend ---
-    ollama_url: str = "http://host.docker.internal:11434"
+    ollama_url: str = "http://127.0.0.1:11434"
     default_model: str = "qwen3:14b"
 
     # --- OCR ---

src/ix/genai/ollama_client.py

@@ -36,7 +36,7 @@ class OllamaClient:
     Parameters
     ----------
     base_url:
-        Root URL of the Ollama server (e.g. ``http://host.docker.internal:11434``).
+        Root URL of the Ollama server (e.g. ``http://127.0.0.1:11434``).
         Trailing slashes are stripped.
     per_call_timeout_s:
         Hard per-call timeout for ``/api/chat``. Spec default: 1500 s.

tests/unit/test_config.py

@@ -51,9 +51,9 @@ def test_defaults_match_spec(monkeypatch: pytest.MonkeyPatch) -> None:
 
     assert cfg.postgres_url == (
         "postgresql+asyncpg://infoxtractor:<password>"
-        "@host.docker.internal:5431/infoxtractor"
+        "@127.0.0.1:5431/infoxtractor"
     )
-    assert cfg.ollama_url == "http://host.docker.internal:11434"
+    assert cfg.ollama_url == "http://127.0.0.1:11434"
     assert cfg.default_model == "qwen3:14b"
     assert cfg.ocr_engine == "surya"
     assert cfg.tmp_dir == "/tmp/ix"