Fix Glances connectivity when web UI runs in Docker container (#135)

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        os: [ubuntu-latest, macos-latest]
         python-version: ["3.11", "3.12", "3.13"]
 
     steps:

CLAUDE.md

@@ -144,6 +144,6 @@ CLI available as `cf` or `compose-farm`.
 | `check` | Validate config, traefik labels, mounts, networks; show host compatibility |
 | `init-network` | Create Docker network on hosts with consistent subnet/gateway |
 | `traefik-file` | Generate Traefik file-provider config from compose labels |
-| `config` | Manage config files (init, show, path, validate, edit, symlink) |
+| `config` | Manage config files (init, init-env, show, path, validate, edit, symlink) |
 | `ssh`   | Manage SSH keys (setup, status, keygen) |
 | `web`   | Start web UI server |

README.md

@@ -1003,6 +1003,7 @@ Full `--help` output for each command. See the [Usage](#usage) table above for a
 │ validate   Validate the config file syntax and schema.                       │
 │ symlink    Create a symlink from the default config location to a config     │
 │            file.                                                             │
+│ init-env   Generate a .env file for Docker deployment.                       │
 ╰──────────────────────────────────────────────────────────────────────────────╯
 
 ```
@@ -1363,6 +1364,14 @@ glances_stack: glances  # Enables resource stats in web UI
 
 3. Deploy: `cf up glances`
 
+4. **(Docker web UI only)** If running the web UI in a Docker container, set `CF_LOCAL_HOST` to your local hostname in `.env`:
+
+```bash
+echo "CF_LOCAL_HOST=nas" >> .env  # Replace 'nas' with your local host name
+```
+
+This tells the web UI to reach the local Glances via container name instead of IP (required due to Docker network isolation).
+
 The web UI dashboard will now show a "Host Resources" section with live stats from all hosts. Hosts where Glances is unreachable show an error indicator.
 
 **Live Stats Page**

docker-compose.yml

@@ -47,6 +47,8 @@ services:
       - CF_CONFIG=${CF_COMPOSE_DIR:-/opt/stacks}/compose-farm.yaml
       # Used to detect self-updates and run via SSH to survive container restart
       - CF_WEB_STACK=compose-farm
+      # Local host for Glances (use container name instead of IP to avoid Docker network issues)
+      - CF_LOCAL_HOST=${CF_LOCAL_HOST:-}
       # HOME must match the user running the container for SSH to find keys
       - HOME=${CF_HOME:-/root}
       # USER is required for SSH when running as non-root (UID not in /etc/passwd)

docs/docker-deployment.md

@@ -0,0 +1,116 @@
+---
+icon: lucide/container
+---
+
+# Docker Deployment
+
+Run the Compose Farm web UI in Docker.
+
+## Quick Start
+
+**1. Get the compose file:**
+
+```bash
+curl -O https://raw.githubusercontent.com/basnijholt/compose-farm/main/docker-compose.yml
+```
+
+**2. Generate `.env` file:**
+
+```bash
+cf config init-env -o .env
+```
+
+This auto-detects settings from your `compose-farm.yaml`:
+- `DOMAIN` from existing traefik labels
+- `CF_COMPOSE_DIR` from config
+- `CF_UID/GID/HOME/USER` from current user
+- `CF_LOCAL_HOST` by matching local IPs to config hosts
+
+Review the output and edit if needed.
+
+**3. Set up SSH keys:**
+
+```bash
+docker compose run --rm cf ssh setup
+```
+
+**4. Start the web UI:**
+
+```bash
+docker compose up -d web
+```
+
+Open `http://localhost:9000` (or `https://compose-farm.example.com` if using Traefik).
+
+---
+
+## Configuration
+
+The `cf config init-env` command auto-detects most settings. After running it, review the generated `.env` file and edit if needed:
+
+```bash
+$EDITOR .env
+```
+
+### What init-env detects
+
+| Variable | How it's detected |
+|----------|-------------------|
+| `DOMAIN` | Extracted from traefik labels in your stacks |
+| `CF_COMPOSE_DIR` | From `compose_dir` in your config |
+| `CF_UID/GID/HOME/USER` | From current user (for NFS compatibility) |
+| `CF_LOCAL_HOST` | By matching local IPs to configured hosts |
+
+If auto-detection fails for any value, edit the `.env` file manually.
+
+### Glances Monitoring
+
+To show host CPU/memory stats in the dashboard, deploy [Glances](https://nicolargo.github.io/glances/) on your hosts. If `CF_LOCAL_HOST` wasn't detected correctly, set it to your local hostname:
+
+```bash
+CF_LOCAL_HOST=nas  # Replace with your local host name
+```
+
+See [Host Resource Monitoring](https://github.com/basnijholt/compose-farm#host-resource-monitoring-glances) in the README.
+
+---
+
+## Troubleshooting
+
+### SSH "Permission denied" or "Host key verification failed"
+
+Regenerate keys:
+
+```bash
+docker compose run --rm cf ssh setup
+```
+
+### Glances shows error for local host
+
+Add your local hostname to `.env`:
+
+```bash
+echo "CF_LOCAL_HOST=nas" >> .env
+docker compose restart web
+```
+
+### Files created as root
+
+Add the non-root variables above and restart.
+
+---
+
+## All Environment Variables
+
+For advanced users, here's the complete reference:
+
+| Variable | Description | Default |
+|----------|-------------|---------|
+| `DOMAIN` | Domain for Traefik labels | *(required)* |
+| `CF_COMPOSE_DIR` | Compose files directory | `/opt/stacks` |
+| `CF_UID` / `CF_GID` | User/group ID | `0` (root) |
+| `CF_HOME` | Home directory | `/root` |
+| `CF_USER` | Username for SSH | `root` |
+| `CF_LOCAL_HOST` | Local hostname for Glances | *(auto-detect)* |
+| `CF_SSH_DIR` | SSH keys directory | `~/.ssh/compose-farm` |
+| `CF_XDG_CONFIG` | Config/backup directory | `~/.config/compose-farm` |

pyproject.toml

@@ -46,6 +46,7 @@ dependencies = [
     "asyncssh>=2.14.0",
     "pyyaml>=6.0",
     "rich>=13.0.0",
+    "python-dotenv>=1.0.0",
 ]
 
 [project.optional-dependencies]

src/compose_farm/cli/common.py

@@ -142,6 +142,9 @@ def load_config_or_exit(config_path: Path | None) -> Config:
     except FileNotFoundError as e:
         print_error(str(e))
         raise typer.Exit(1) from e
+    except Exception as e:
+        print_error(f"Invalid config: {e}")
+        raise typer.Exit(1) from e
 
 
 def get_stacks(

src/compose_farm/cli/config.py

@@ -9,7 +9,7 @@ import shutil
 import subprocess
 from importlib import resources
 from pathlib import Path
-from typing import Annotated
+from typing import TYPE_CHECKING, Annotated
 
 import typer
 
@@ -17,6 +17,9 @@ from compose_farm.cli.app import app
 from compose_farm.console import MSG_CONFIG_NOT_FOUND, console, print_error, print_success
 from compose_farm.paths import config_search_paths, default_config_path, find_config_path
 
+if TYPE_CHECKING:
+    from compose_farm.config import Config
+
 config_app = typer.Typer(
     name="config",
     help="Manage compose-farm configuration files.",
@@ -68,6 +71,22 @@ def _get_config_file(path: Path | None) -> Path | None:
     return config_path.resolve() if config_path else None
 
 
+def _load_config_with_path(path: Path | None) -> tuple[Path, Config]:
+    """Load config and return both the resolved path and Config object.
+
+    Exits with error if config not found or invalid.
+    """
+    from compose_farm.cli.common import load_config_or_exit  # noqa: PLC0415
+
+    config_file = _get_config_file(path)
+    if config_file is None:
+        print_error(MSG_CONFIG_NOT_FOUND)
+        raise typer.Exit(1)
+
+    cfg = load_config_or_exit(config_file)
+    return config_file, cfg
+
+
 def _report_missing_config(explicit_path: Path | None = None) -> None:
     """Report that a config file was not found."""
     console.print("[yellow]Config file not found.[/yellow]")
@@ -207,23 +226,7 @@ def config_validate(
     path: _PathOption = None,
 ) -> None:
     """Validate the config file syntax and schema."""
-    config_file = _get_config_file(path)
-
-    if config_file is None:
-        print_error(MSG_CONFIG_NOT_FOUND)
-        raise typer.Exit(1)
-
-    # Lazy import: pydantic adds ~50ms to startup, only load when actually needed
-    from compose_farm.config import load_config  # noqa: PLC0415
-
-    try:
-        cfg = load_config(config_file)
-    except FileNotFoundError as e:
-        print_error(str(e))
-        raise typer.Exit(1) from e
-    except Exception as e:
-        print_error(f"Invalid config: {e}")
-        raise typer.Exit(1) from e
+    config_file, cfg = _load_config_with_path(path)
 
     print_success(f"Valid config: {config_file}")
     console.print(f"  Hosts: {len(cfg.hosts)}")
@@ -293,5 +296,129 @@ def config_symlink(
     console.print(f"    -> {target_path}")
 
 
+def _detect_domain(cfg: Config) -> str | None:
+    """Try to detect DOMAIN from traefik Host() rules in existing stacks.
+
+    Uses extract_website_urls from traefik module to get interpolated
+    URLs, then extracts the domain from the first valid URL.
+    Skips local domains (.local, localhost, etc.).
+    """
+    from urllib.parse import urlparse  # noqa: PLC0415
+
+    from compose_farm.traefik import extract_website_urls  # noqa: PLC0415
+
+    max_stacks_to_check = 10
+    min_domain_parts = 2
+    subdomain_parts = 4
+    skip_tlds = {"local", "localhost", "internal", "lan", "home"}
+
+    for stack_name in list(cfg.stacks.keys())[:max_stacks_to_check]:
+        urls = extract_website_urls(cfg, stack_name)
+        for url in urls:
+            host = urlparse(url).netloc
+            parts = host.split(".")
+            # Skip local/internal domains
+            if parts[-1].lower() in skip_tlds:
+                continue
+            if len(parts) >= subdomain_parts:
+                # e.g., "app.lab.nijho.lt" -> "lab.nijho.lt"
+                return ".".join(parts[-3:])
+            if len(parts) >= min_domain_parts:
+                # e.g., "app.example.com" -> "example.com"
+                return ".".join(parts[-2:])
+    return None
+
+
+def _detect_local_host(cfg: Config) -> str | None:
+    """Find which config host matches local machine's IPs."""
+    from compose_farm.executor import is_local  # noqa: PLC0415
+
+    for name, host in cfg.hosts.items():
+        if is_local(host):
+            return name
+    return None
+
+
+@config_app.command("init-env")
+def config_init_env(
+    path: _PathOption = None,
+    output: Annotated[
+        Path | None,
+        typer.Option(
+            "--output", "-o", help="Output .env file path. Defaults to .env in config directory."
+        ),
+    ] = None,
+    force: _ForceOption = False,
+) -> None:
+    """Generate a .env file for Docker deployment.
+
+    Reads the compose-farm.yaml config and auto-detects settings:
+    - CF_COMPOSE_DIR from compose_dir
+    - CF_LOCAL_HOST by detecting which config host matches local IPs
+    - CF_UID/GID/HOME/USER from current user
+    - DOMAIN from traefik labels in stacks (if found)
+
+    Example::
+
+        cf config init-env           # Create .env next to config
+        cf config init-env -o .env   # Create .env in current directory
+
+    """
+    config_file, cfg = _load_config_with_path(path)
+
+    # Determine output path
+    env_path = output.expanduser().resolve() if output else config_file.parent / ".env"
+
+    if env_path.exists() and not force:
+        console.print(f"[yellow].env file already exists:[/] {env_path}")
+        if not typer.confirm("Overwrite?"):
+            console.print("[dim]Aborted.[/dim]")
+            raise typer.Exit(0)
+
+    # Auto-detect values
+    uid = os.getuid()
+    gid = os.getgid()
+    home = os.environ.get("HOME", "/root")
+    user = os.environ.get("USER", "root")
+    compose_dir = str(cfg.compose_dir)
+    local_host = _detect_local_host(cfg)
+    domain = _detect_domain(cfg)
+
+    # Generate .env content
+    lines = [
+        "# Generated by: cf config init-env",
+        f"# From config: {config_file}",
+        "",
+        "# Domain for Traefik labels",
+        f"DOMAIN={domain or 'example.com'}",
+        "",
+        "# Compose files location",
+        f"CF_COMPOSE_DIR={compose_dir}",
+        "",
+        "# Run as current user (recommended for NFS)",
+        f"CF_UID={uid}",
+        f"CF_GID={gid}",
+        f"CF_HOME={home}",
+        f"CF_USER={user}",
+        "",
+        "# Local hostname for Glances integration",
+        f"CF_LOCAL_HOST={local_host or '# auto-detect failed - set manually'}",
+        "",
+    ]
+
+    env_path.write_text("\n".join(lines), encoding="utf-8")
+
+    print_success(f"Created .env file: {env_path}")
+    console.print()
+    console.print("[dim]Detected settings:[/dim]")
+    console.print(f"  DOMAIN: {domain or '[yellow]example.com[/] (edit this)'}")
+    console.print(f"  CF_COMPOSE_DIR: {compose_dir}")
+    console.print(f"  CF_UID/GID: {uid}:{gid}")
+    console.print(f"  CF_LOCAL_HOST: {local_host or '[yellow]not detected[/] (set manually)'}")
+    console.print()
+    console.print("[dim]Review and edit as needed:[/dim]")
+    console.print(f"  [cyan]$EDITOR {env_path}[/cyan]")
+
+
 # Register config subcommand on the shared app
 app.add_typer(config_app, name="config", rich_help_panel="Configuration")

src/compose_farm/cli/management.py

@@ -56,7 +56,6 @@ from compose_farm.operations import (
     check_stack_requirements,
 )
 from compose_farm.state import get_orphaned_stacks, load_state, save_state
-from compose_farm.traefik import generate_traefik_config, render_traefik_config
 
 # --- Sync helpers ---
 
@@ -328,6 +327,8 @@ def _report_orphaned_stacks(cfg: Config) -> bool:
 
 def _report_traefik_status(cfg: Config, stacks: list[str]) -> None:
     """Check and report traefik label status."""
+    from compose_farm.traefik import generate_traefik_config  # noqa: PLC0415
+
     try:
         _, warnings = generate_traefik_config(cfg, stacks, check_all=True)
     except (FileNotFoundError, ValueError):
@@ -447,6 +448,11 @@ def traefik_file(
     config: ConfigOption = None,
 ) -> None:
     """Generate a Traefik file-provider fragment from compose Traefik labels."""
+    from compose_farm.traefik import (  # noqa: PLC0415
+        generate_traefik_config,
+        render_traefik_config,
+    )
+
     stack_list, cfg = get_stacks(stacks or [], all_stacks, config)
     try:
         dynamic, warnings = generate_traefik_config(cfg, stack_list)

src/compose_farm/compose.py

@@ -13,6 +13,7 @@ from pathlib import Path
 from typing import TYPE_CHECKING, Any
 
 import yaml
+from dotenv import dotenv_values
 
 if TYPE_CHECKING:
     from .config import Config
@@ -40,21 +41,8 @@ def _load_env(compose_path: Path) -> dict[str, str]:
     Reads from .env file in the same directory as compose file,
     then overlays current environment variables.
     """
-    env: dict[str, str] = {}
     env_path = compose_path.parent / ".env"
-    if env_path.exists():
-        for line in env_path.read_text().splitlines():
-            stripped = line.strip()
-            if not stripped or stripped.startswith("#") or "=" not in stripped:
-                continue
-            key, value = stripped.split("=", 1)
-            key = key.strip()
-            value = value.strip()
-            if (value.startswith('"') and value.endswith('"')) or (
-                value.startswith("'") and value.endswith("'")
-            ):
-                value = value[1:-1]
-            env[key] = value
+    env: dict[str, str] = {k: v for k, v in dotenv_values(env_path).items() if v is not None}
     env.update({k: v for k, v in os.environ.items() if isinstance(v, str)})
     return env
 

src/compose_farm/glances.py

@@ -3,16 +3,48 @@
 from __future__ import annotations
 
 import asyncio
+import os
 from dataclasses import dataclass
 from typing import TYPE_CHECKING, Any
 
+from .executor import is_local
+
 if TYPE_CHECKING:
-    from .config import Config
+    from .config import Config, Host
 
 # Default Glances REST API port
 DEFAULT_GLANCES_PORT = 61208
 
 
+def _get_glances_address(
+    host_name: str,
+    host: Host,
+    glances_container: str | None,
+) -> str:
+    """Get the address to use for Glances API requests.
+
+    When running in a Docker container (CF_WEB_STACK set), the local host's Glances
+    may not be reachable via its LAN IP due to Docker network isolation. In this case,
+    we use the Glances container name for the local host.
+    Set CF_LOCAL_HOST=<hostname> to explicitly specify which host is local.
+    """
+    # Only use container name when running inside a Docker container
+    in_container = os.environ.get("CF_WEB_STACK") is not None
+    if not in_container or not glances_container:
+        return host.address
+
+    # CF_LOCAL_HOST explicitly tells us which host to reach via container name
+    explicit_local = os.environ.get("CF_LOCAL_HOST")
+    if explicit_local and host_name == explicit_local:
+        return glances_container
+
+    # Fall back to is_local detection (may not work in container)
+    if is_local(host):
+        return glances_container
+
+    return host.address
+
+
 @dataclass
 class HostStats:
     """Resource statistics for a host."""
@@ -112,7 +144,11 @@ async def fetch_all_host_stats(
     port: int = DEFAULT_GLANCES_PORT,
 ) -> dict[str, HostStats]:
     """Fetch stats from all hosts in parallel."""
-    tasks = [fetch_host_stats(name, host.address, port) for name, host in config.hosts.items()]
+    glances_container = config.glances_stack
+    tasks = [
+        fetch_host_stats(name, _get_glances_address(name, host, glances_container), port)
+        for name, host in config.hosts.items()
+    ]
     results = await asyncio.gather(*tasks)
     return {stats.host: stats for stats in results}
 
@@ -212,6 +248,8 @@ async def fetch_all_container_stats(
     """Fetch container stats from all hosts in parallel, enriched with compose labels."""
     from .executor import get_container_compose_labels  # noqa: PLC0415
 
+    glances_container = config.glances_stack
+
     async def fetch_host_data(
         host_name: str,
         host_address: str,
@@ -230,7 +268,10 @@ async def fetch_all_container_stats(
             c.stack, c.service = labels.get(c.name, ("", ""))
         return containers
 
-    tasks = [fetch_host_data(name, host.address) for name, host in config.hosts.items()]
+    tasks = [
+        fetch_host_data(name, _get_glances_address(name, host, glances_container))
+        for name, host in config.hosts.items()
+    ]
     results = await asyncio.gather(*tasks)
     # Flatten list of lists
     return [container for host_containers in results for container in host_containers]

tests/test_config_cmd.py

@@ -9,10 +9,13 @@ from typer.testing import CliRunner
 
 from compose_farm.cli import app
 from compose_farm.cli.config import (
+    _detect_domain,
+    _detect_local_host,
     _generate_template,
     _get_config_file,
     _get_editor,
 )
+from compose_farm.config import Config, Host
 
 
 @pytest.fixture
@@ -228,3 +231,159 @@ class TestConfigValidate:
         # Error goes to stderr
         output = result.stdout + (result.stderr or "")
         assert "Config file not found" in output or "not found" in output.lower()
+
+
+class TestDetectLocalHost:
+    """Tests for _detect_local_host function."""
+
+    def test_detects_localhost(self) -> None:
+        cfg = Config(
+            compose_dir=Path("/opt/compose"),
+            hosts={
+                "local": Host(address="localhost"),
+                "remote": Host(address="192.168.1.100"),
+            },
+            stacks={"test": "local"},
+        )
+        result = _detect_local_host(cfg)
+        assert result == "local"
+
+    def test_returns_none_for_remote_only(self) -> None:
+        cfg = Config(
+            compose_dir=Path("/opt/compose"),
+            hosts={
+                "remote1": Host(address="192.168.1.100"),
+                "remote2": Host(address="192.168.1.200"),
+            },
+            stacks={"test": "remote1"},
+        )
+        result = _detect_local_host(cfg)
+        # Remote IPs won't match local machine
+        assert result is None or result in cfg.hosts
+
+
+class TestDetectDomain:
+    """Tests for _detect_domain function."""
+
+    def test_returns_none_for_empty_stacks(self) -> None:
+        cfg = Config(
+            compose_dir=Path("/opt/compose"),
+            hosts={"nas": Host(address="192.168.1.6")},
+            stacks={},
+        )
+        result = _detect_domain(cfg)
+        assert result is None
+
+    def test_skips_local_domains(self, tmp_path: Path) -> None:
+        # Create a minimal compose file with .local domain
+        stack_dir = tmp_path / "test"
+        stack_dir.mkdir()
+        compose = stack_dir / "compose.yaml"
+        compose.write_text(
+            """
+name: test
+services:
+  web:
+    image: nginx
+    labels:
+      - "traefik.http.routers.test-local.rule=Host(`test.local`)"
+"""
+        )
+        cfg = Config(
+            compose_dir=tmp_path,
+            hosts={"nas": Host(address="192.168.1.6")},
+            stacks={"test": "nas"},
+        )
+        result = _detect_domain(cfg)
+        # .local should be skipped
+        assert result is None
+
+
+class TestConfigInitEnv:
+    """Tests for cf config init-env command."""
+
+    def test_init_env_creates_file(
+        self,
+        runner: CliRunner,
+        tmp_path: Path,
+        valid_config_data: dict[str, Any],
+        monkeypatch: pytest.MonkeyPatch,
+    ) -> None:
+        monkeypatch.delenv("CF_CONFIG", raising=False)
+        config_file = tmp_path / "compose-farm.yaml"
+        config_file.write_text(yaml.dump(valid_config_data))
+        env_file = tmp_path / ".env"
+
+        result = runner.invoke(
+            app, ["config", "init-env", "-p", str(config_file), "-o", str(env_file)]
+        )
+
+        assert result.exit_code == 0
+        assert env_file.exists()
+        content = env_file.read_text()
+        assert "CF_COMPOSE_DIR=/opt/compose" in content
+        assert "CF_UID=" in content
+        assert "CF_GID=" in content
+
+    def test_init_env_force_overwrites(
+        self,
+        runner: CliRunner,
+        tmp_path: Path,
+        valid_config_data: dict[str, Any],
+        monkeypatch: pytest.MonkeyPatch,
+    ) -> None:
+        monkeypatch.delenv("CF_CONFIG", raising=False)
+        config_file = tmp_path / "compose-farm.yaml"
+        config_file.write_text(yaml.dump(valid_config_data))
+        env_file = tmp_path / ".env"
+        env_file.write_text("OLD_CONTENT=true")
+
+        result = runner.invoke(
+            app, ["config", "init-env", "-p", str(config_file), "-o", str(env_file), "-f"]
+        )
+
+        assert result.exit_code == 0
+        content = env_file.read_text()
+        assert "OLD_CONTENT" not in content
+        assert "CF_COMPOSE_DIR" in content
+
+    def test_init_env_prompts_on_existing(
+        self,
+        runner: CliRunner,
+        tmp_path: Path,
+        valid_config_data: dict[str, Any],
+        monkeypatch: pytest.MonkeyPatch,
+    ) -> None:
+        monkeypatch.delenv("CF_CONFIG", raising=False)
+        config_file = tmp_path / "compose-farm.yaml"
+        config_file.write_text(yaml.dump(valid_config_data))
+        env_file = tmp_path / ".env"
+        env_file.write_text("KEEP_THIS=true")
+
+        result = runner.invoke(
+            app,
+            ["config", "init-env", "-p", str(config_file), "-o", str(env_file)],
+            input="n\n",
+        )
+
+        assert result.exit_code == 0
+        assert "Aborted" in result.stdout
+        assert env_file.read_text() == "KEEP_THIS=true"
+
+    def test_init_env_defaults_to_config_dir(
+        self,
+        runner: CliRunner,
+        tmp_path: Path,
+        valid_config_data: dict[str, Any],
+        monkeypatch: pytest.MonkeyPatch,
+    ) -> None:
+        monkeypatch.delenv("CF_CONFIG", raising=False)
+        config_file = tmp_path / "compose-farm.yaml"
+        config_file.write_text(yaml.dump(valid_config_data))
+
+        result = runner.invoke(app, ["config", "init-env", "-p", str(config_file)])
+
+        assert result.exit_code == 0
+        # Should create .env in same directory as config
+        env_file = tmp_path / ".env"
+        assert env_file.exists()

tests/test_glances.py

@@ -11,6 +11,7 @@ from compose_farm.glances import (
     DEFAULT_GLANCES_PORT,
     ContainerStats,
     HostStats,
+    _get_glances_address,
     fetch_all_container_stats,
     fetch_all_host_stats,
     fetch_container_stats,
@@ -347,3 +348,62 @@ class TestFetchAllContainerStats:
         hosts = {c.host for c in containers}
         assert "nas" in hosts
         assert "nuc" in hosts
+
+
+class TestGetGlancesAddress:
+    """Tests for _get_glances_address function."""
+
+    def test_returns_host_address_outside_container(self, monkeypatch: pytest.MonkeyPatch) -> None:
+        """Without CF_WEB_STACK, always return host address."""
+        monkeypatch.delenv("CF_WEB_STACK", raising=False)
+        monkeypatch.delenv("CF_LOCAL_HOST", raising=False)
+        host = Host(address="192.168.1.6")
+        result = _get_glances_address("nas", host, "glances")
+        assert result == "192.168.1.6"
+
+    def test_returns_host_address_without_glances_container(
+        self, monkeypatch: pytest.MonkeyPatch
+    ) -> None:
+        """In container without glances_stack config, return host address."""
+        monkeypatch.setenv("CF_WEB_STACK", "compose-farm")
+        monkeypatch.delenv("CF_LOCAL_HOST", raising=False)
+        host = Host(address="192.168.1.6")
+        result = _get_glances_address("nas", host, None)
+        assert result == "192.168.1.6"
+
+    def test_returns_container_name_for_explicit_local_host(
+        self, monkeypatch: pytest.MonkeyPatch
+    ) -> None:
+        """CF_LOCAL_HOST explicitly marks which host uses container name."""
+        monkeypatch.setenv("CF_WEB_STACK", "compose-farm")
+        monkeypatch.setenv("CF_LOCAL_HOST", "nas")
+        host = Host(address="192.168.1.6")
+        result = _get_glances_address("nas", host, "glances")
+        assert result == "glances"
+
+    def test_returns_host_address_for_non_local_host(self, monkeypatch: pytest.MonkeyPatch) -> None:
+        """Non-local hosts use their IP address even in container mode."""
+        monkeypatch.setenv("CF_WEB_STACK", "compose-farm")
+        monkeypatch.setenv("CF_LOCAL_HOST", "nas")
+        host = Host(address="192.168.1.2")
+        result = _get_glances_address("nuc", host, "glances")
+        assert result == "192.168.1.2"
+
+    def test_fallback_to_is_local_detection(self, monkeypatch: pytest.MonkeyPatch) -> None:
+        """Without CF_LOCAL_HOST, falls back to is_local detection."""
+        monkeypatch.setenv("CF_WEB_STACK", "compose-farm")
+        monkeypatch.delenv("CF_LOCAL_HOST", raising=False)
+        # Use localhost which should be detected as local
+        host = Host(address="localhost")
+        result = _get_glances_address("local", host, "glances")
+        assert result == "glances"
+
+    def test_remote_host_not_affected_by_container_mode(
+        self, monkeypatch: pytest.MonkeyPatch
+    ) -> None:
+        """Remote hosts always use their IP, even in container mode."""
+        monkeypatch.setenv("CF_WEB_STACK", "compose-farm")
+        monkeypatch.delenv("CF_LOCAL_HOST", raising=False)
+        host = Host(address="192.168.1.100")
+        result = _get_glances_address("remote", host, "glances")
+        assert result == "192.168.1.100"

uv.lock

@@ -234,6 +234,7 @@ source = { editable = "." }
 dependencies = [
     { name = "asyncssh" },
     { name = "pydantic" },
+    { name = "python-dotenv" },
     { name = "pyyaml" },
     { name = "rich" },
     { name = "typer" },
@@ -274,6 +275,7 @@ requires-dist = [
     { name = "humanize", marker = "extra == 'web'", specifier = ">=4.0.0" },
     { name = "jinja2", marker = "extra == 'web'", specifier = ">=3.1.0" },
     { name = "pydantic", specifier = ">=2.0.0" },
+    { name = "python-dotenv", specifier = ">=1.0.0" },
     { name = "pyyaml", specifier = ">=6.0" },
     { name = "rich", specifier = ">=13.0.0" },
     { name = "typer", specifier = ">=0.9.0" },

zensical.toml

@@ -16,6 +16,7 @@ extra_javascript = ["javascripts/video-fix.js"]
 nav = [
   { "Home" = "index.md" },
   { "Getting Started" = "getting-started.md" },
+  { "Docker Deployment" = "docker-deployment.md" },
   { "Configuration" = "configuration.md" },
   { "Commands" = "commands.md" },
   { "Web UI" = "web-ui.md" },