roji

roji

A simple reverse proxy for local development environments. Automatically discovers Docker Compose services and provides HTTPS access via *.dev.localhost.

"Use the highway (Traefik) for production, take the back alley (roji) for development"

Features

• Native Mode: Run as a standalone binary without Docker (v0.8.0+)
• Auto-discovery: Automatically detects and routes containers on the shared network
• TLS Support: Auto-generates certificates (no mkcert required) or use your own
• Label-based Configuration: Customize hostnames and ports via container labels
• Dynamic Updates: Automatically tracks container start/stop events
• Live Dashboard: Real-time route updates via Server-Sent Events with optional browser notifications
• Project History: Tracks active and recent Docker Compose projects with quick restart commands
• Dark Mode: Automatic theme switching based on system preferences with manual toggle
• Request Logging: Real-time request log viewer with filtering and JSON/CSV export
• WebSocket Support: Full bidirectional WebSocket proxying
• gRPC Support: HTTP/2 based gRPC proxying with streaming support
• Multiple Networks: Monitor multiple Docker networks simultaneously
• Container Management: Restart containers directly from the dashboard
• Docker Compose Operations: Start/stop/restart projects from dashboard or API
• Request Mocking: Define mock responses via labels for frontend development
• Basic Authentication: Protect routes with username/password via labels or config
• Static File Hosting: Serve static files with directory listing
• Service Management: Run as system service (systemd/launchd/Windows Service)
• Environment Diagnostics: roji doctor checks and fixes common issues
• Simple: Minimal implementation focused on local development

Installation

One-liner Install (Recommended)

Install and start roji with a single command:

curl -fsSL https://raw.githubusercontent.com/kan/roji/v0.9.0/install.sh | bash

This will:

• Download the roji binary for your platform (Linux/macOS, x86_64/arm64)
• Install to ~/.local/bin by default (interactive prompt for location)
• Run roji doctor --fix to set up the environment
• Install CA certificate to system trust store
• Register and start roji as a system service

Installation options:

# Install to /usr/local/bin (system-wide)
curl -fsSL ... | bash -s -- --global

# Install to ~/.local/bin (default, no sudo for install)
curl -fsSL ... | bash -s -- --local

# Skip service installation (manual start with `sudo roji`)
curl -fsSL ... | bash -s -- --no-service

Upgrading

The install script automatically detects existing installations:

curl -fsSL https://raw.githubusercontent.com/kan/roji/v0.9.0/install.sh | bash

• Same version: Shows "already up to date" and exits
• Newer available: Prompts to upgrade (auto-upgrades in piped mode)
• Docker Mode detected: Offers migration to Native Mode

Force upgrade (skip prompts):

curl -fsSL https://raw.githubusercontent.com/kan/roji/v0.9.0/install.sh | bash -s -- --upgrade

Manual Installation

Download from GitHub Releases or build from source:

# Build from source
git clone https://github.com/kan/roji.git
cd roji
make build

# Run diagnostics and fix issues
sudo ./bin/roji doctor --fix

# Install CA certificate to system trust store
sudo ./bin/roji ca install

# Option 1: Run as service (recommended)
sudo ./bin/roji service install
sudo ./bin/roji service start

# Option 2: Run in foreground
sudo ./bin/roji

Configuration is stored in ~/.config/roji/config.yaml. See CLI Commands for more details.

Docker Mode (Legacy)

For Docker-based installation, use the legacy installer:

curl -fsSL https://raw.githubusercontent.com/kan/roji/v0.9.0/install-docker.sh | bash

This installs roji as a Docker container with docker-compose. Note that Native Mode (above) is now the recommended approach.

Manual Docker setup:

# Clone repository
git clone https://github.com/kan/roji.git
cd roji

# Create network and start
docker network create roji
docker compose up -d

For development: Use docker compose -f docker-compose.dev.yml up for hot-reloading with Air.

Certificates are automatically generated on first startup. See TLS Certificates for how to trust them.

5. Start your application

# your-app/docker-compose.yml
services:
  myapp:
    image: your-app
    expose:
      - "3000"
    networks:
      - roji

networks:
  roji:
    external: true

Your app is now accessible at https://myapp.dev.localhost!

TLS Certificates

Auto-generated Certificates (Default)

roji automatically generates TLS certificates on first startup:

certs/
├── ca.crt      # CA certificate (Windows)
├── ca.pem      # CA certificate (macOS/Linux)
├── ca-key.pem  # CA private key
├── cert.pem    # Server certificate
└── key.pem     # Server private key

To trust HTTPS connections, install the CA certificate in your OS/browser:

Windows

1. Double-click certs/ca.crt
2. Click "Install Certificate"
3. Select "Local Machine" (requires admin) or "Current User"
4. Select "Place all certificates in the following store"
5. Click "Browse" → Select "Trusted Root Certification Authorities"
6. Click "Next" → "Finish"
7. Restart your browser

macOS

# Add to system keychain (requires password)
sudo security add-trusted-cert -d -r trustRoot -k /Library/Keychains/System.keychain certs/ca.pem

# Or open in Keychain Access and set "Always Trust"
open certs/ca.pem

Linux (Chrome/Chromium)

# Install certutil if needed
# Debian/Ubuntu: sudo apt install libnss3-tools
# Fedora: sudo dnf install nss-tools

# Add to Chrome/Chromium certificate store
certutil -d sql:$HOME/.pki/nssdb -A -t "C,," -n "roji CA" -i certs/ca.pem

Firefox (All platforms)

Firefox uses its own certificate store:

1. Open Firefox → Settings → Privacy & Security
2. Scroll to "Certificates" → Click "View Certificates"
3. Go to "Authorities" tab → Click "Import"
4. Select certs/ca.pem (or ca.crt on Windows)
5. Check "Trust this CA to identify websites"
6. Click OK

Using mkcert (Alternative)

If you prefer mkcert, generate certificates before starting roji:

mkcert -install
mkdir -p certs
mkcert -cert-file certs/cert.pem -key-file certs/key.pem \
  "*.dev.localhost" "*.yourproject.localhost" localhost 127.0.0.1

roji will use existing certificates and skip auto-generation.

Configuration

How Auto-discovery Works

1. Detects containers connected to the roji network
2. Uses the EXPOSEd port (first one if multiple)
3. Generates hostname as {service}.{domain} from the service name

Customizing with Labels

Label	Description	Default
roji.host	Custom hostname	{service}.dev.localhost
roji.port	Target port	First EXPOSE'd port
roji.path	Path prefix	none
roji.mock.{METHOD}.{PATH}	Mock response body	none
roji.mock.status.{METHOD}.{PATH}	Mock response status code	200
roji.auth.basic.user	Basic auth username	none
roji.auth.basic.pass	Basic auth password	none
roji.auth.basic.realm	Basic auth realm	Restricted

Examples

services:
  # Custom hostname
  api:
    image: my-api
    labels:
      - "roji.host=api.dev.localhost"
    networks:
      - roji

  # Port specification (when multiple ports are exposed)
  app:
    image: my-app
    expose:
      - "3000"
      - "9229"
    labels:
      - "roji.port=3000"
    networks:
      - roji

  # Path-based routing
  # https://myapp.dev.localhost/api/* -> this service
  api-service:
    image: my-api
    labels:
      - "roji.host=myapp.dev.localhost"
      - "roji.path=/api"
    networks:
      - roji

  # Request mocking (for frontend development)
  # Returns mock JSON responses without a real backend
  mock-api:
    image: alpine
    command: ["sleep", "infinity"]
    labels:
      - "roji.host=api.dev.localhost"
      - 'roji.mock.GET./api/users=[{"id":1,"name":"Alice"},{"id":2,"name":"Bob"}]'
      - 'roji.mock.GET./api/health={"status":"ok"}'
      - "roji.mock.status.POST./api/users=201"
    networks:
      - roji

  # Basic authentication
  # Requires username/password to access
  admin:
    image: my-admin-panel
    labels:
      - "roji.host=admin.dev.localhost"
      - "roji.auth.basic.user=admin"
      - "roji.auth.basic.pass=secret"
      - "roji.auth.basic.realm=Admin Area"
    networks:
      - roji

Static File Hosting

Host static files directly from roji without Docker containers. Configure in ~/.config/roji/config.yaml:

static_sites:
  - host: docs                    # -> docs.dev.localhost
    root: ~/projects/docs/build
    # index: true                 # Directory listing (default: enabled)
  - host: private.example.com     # FQDN (dot in hostname)
    root: /var/www/private
    index: false                  # Disable directory listing
    auth:
      basic:
        user: admin
        pass: secret
        realm: Private Area       # Optional

Environment Variables

Variable	Description	Default (Native)	Default (Docker)
ROJI_NETWORK	Docker network(s) to watch (comma-separated)	roji	roji
ROJI_DOMAIN	Base domain	dev.localhost	dev.localhost
ROJI_CERTS_DIR	Certificate directory	~/.local/share/roji/certs	/certs
ROJI_DATA_DIR	Data directory (project history)	~/.local/share/roji	/data
ROJI_DASHBOARD	Dashboard hostname	roji.{domain}	roji.{domain}
ROJI_LOG_LEVEL	Log level	info	info
ROJI_AUTO_CERT	Auto-generate certificates	true	true

Settings priority (highest to lowest): CLI flags > Environment variables > Config file > Defaults

Custom Domain Example

environment:
  - ROJI_DOMAIN=dev.localhost  # Use *.dev.localhost
  - ROJI_DASHBOARD=dev.localhost

Dashboard

Access the dashboard at:

• https://roji.dev.localhost (dashboard host)
• https://dev.localhost (redirects to dashboard host)

The dashboard provides:

• Live Route Updates: Real-time updates via Server-Sent Events when containers start/stop
• Browser Notifications: Optional desktop notifications for route changes
• Active Projects: Currently running Docker Compose projects with start/stop/restart controls
• Project History: Recently stopped projects with one-click start or copy of restart commands
• Project Auto-start: Not Found page detects inactive projects and offers a start button
• Request Log Viewer: Real-time request logging with filtering by host and path
• Container Restart: Restart containers directly from the dashboard
• Route Management: Stop projects directly from the routes list
• Dark Mode: Toggle between light/dark themes or follow system preferences
• System Status: Build version, uptime, connection status

The dashboard automatically updates without page refresh.

CLI Commands

roji doctor

Check environment and fix common issues:

roji doctor          # Run all checks
roji doctor --fix    # Auto-fix issues where possible
roji doctor --json   # Output as JSON

Checks include:

• Docker daemon and socket accessibility
• Network existence
• Port availability (80, 443)
• CA certificate existence and installation
• Server certificate validity and domain matching
• DNS resolution

roji config

Manage configuration:

roji config show     # Display current settings
roji config path     # Show config file locations
roji config init     # Create default config file
roji config edit     # Open in $EDITOR

Configuration file location: ~/.config/roji/config.yaml

roji ca

Manage CA certificate:

roji ca status              # Check installation status
roji ca install             # Install to system trust store
roji ca install --user      # Install to user store (no sudo)
roji ca install --windows   # Install to Windows (from WSL)
roji ca uninstall           # Remove from trust store
roji ca export [path]       # Export CA certificate

roji service

Manage roji as a system service:

roji service install    # Register as system service
roji service uninstall  # Remove service registration
roji service start      # Start the service
roji service stop       # Stop the service
roji service restart    # Restart the service
roji service status     # Show service status

Platform support:

• Linux: systemd (/etc/systemd/system/roji.service)
• macOS: launchd (~/Library/LaunchAgents/com.roji.agent.plist)
• Windows: NSSM-based Windows Service

Health Check

roji provides health check endpoints for monitoring and container orchestration:

• /_api/health - JSON health status (consistent with API pattern)
• /healthz - Kubernetes/Docker standard health check

Both endpoints return the same response:

{
  "status": "healthy",
  "routes": 3
}

Docker health check: Automatically configured in the production image (checks every 30 seconds).

Status API

roji provides a comprehensive status endpoint at /_api/status that shows the current state of the proxy:

{
  "version": "0.1.0",
  "uptime_seconds": 3600,
  "certificates": {
    "auto_generated": true,
    "directory": "/certs",
    "ca": {
      "exists": true,
      "valid_until": "2035-01-15T12:00:00Z",
      "days_remaining": 3650,
      "subject": "CN=roji CA,O=roji Dev CA"
    },
    "server": {
      "exists": true,
      "valid_until": "2026-01-15T12:00:00Z",
      "days_remaining": 365,
      "subject": "CN=*.dev.localhost",
      "dns_names": ["*.dev.localhost", "dev.localhost", "localhost"]
    }
  },
  "docker": {
    "connected": true,
    "network": "roji"
  },
  "proxy": {
    "routes_count": 3,
    "dashboard_host": "dev.localhost",
    "base_domain": "localhost",
    "http_port": 80,
    "https_port": 443
  },
  "health": "healthy"
}

Health Status

The health field indicates the overall system health:

• healthy - All systems operational
• degraded - Certificates expiring within 30 days or missing
• unhealthy - Docker connection lost

Troubleshooting

.localhost domain doesn't resolve

macOS: .localhost automatically resolves to 127.0.0.1.

Linux: Add to /etc/hosts or configure dnsmasq:

echo "127.0.0.1 myapp.dev.localhost dev.localhost" | sudo tee -a /etc/hosts

Or use *.lvh.me (a public domain that always resolves to 127.0.0.1)

Container not detected

1. Verify the container is connected to the roji network:

   docker network inspect roji
   

2. Check if the port is exposed:

   docker inspect <container> | jq '.[0].Config.ExposedPorts'
   

Certificate errors (ERR_CERT_AUTHORITY_INVALID)

The CA certificate is not trusted. See TLS Certificates for installation instructions.

Important: On Windows, make sure to install the certificate in the "Trusted Root Certification Authorities" store, not the default store.

After installing, restart your browser completely (close all windows).

Name Origin

roji means "back alley" or "narrow lane" in Japanese. The concept is to use the highway (Traefik) for production and casually take the back alley (roji) for local development.

License

MIT