Traefik Config Generator
Build robust static and dynamic routing configurations for the Traefik edge router.
Traefik Settings
Global & EntryPoints
HTTP EntryPoint
HTTPS EntryPoint
Providers & Certificates
ACME / Let's Encrypt
Configuration Health
Detailed Analysis
Best Practice Analysis
Production Readiness
Overview
The Traefik Configuration Generator is designed to help you construct the static configuration file (`traefik.yml` or `traefik.toml`) for Traefik, the modern cloud-native edge router.
Unlike traditional web servers, Traefik discovers routing rules dynamically from your infrastructure (like Docker labels, Kubernetes Ingress, or Consul). However, Traefik still requires a robust static configuration to define its EntryPoints (ports), certificate resolvers (Let's Encrypt), metrics exporters, and logging formats. This tool ensures your edge router is perfectly initialized for dynamic discovery.
How It Works
1. Configure EntryPoints: EntryPoints are the network ports that Traefik listens on. Typically, you need web (Port 80) and websecure (Port 443). You can configure Port 80 to automatically redirect all traffic to 443.
2. Define Providers: Providers tell Traefik where to look for dynamic routing rules. The most common provider is Docker. By enabling the Docker provider, Traefik will automatically read labels on your containers to route traffic to them.
3. Setup Let's Encrypt: Configure a Certificate Resolver (e.g., named myresolver) using the ACME protocol. Traefik will automatically negotiate and renew free SSL certificates for any domains routed through it.
4. Expose the Dashboard: Traefik comes with a built-in UI for visualizing your routers and services. You can configure it to be accessible securely via a dedicated port or routed through an authenticated ingress.
Best Practices
- Always enable HTTP to HTTPS redirection globally at the EntryPoint level rather than on a per-router basis to ensure no unencrypted traffic ever reaches your backend.
- Do not expose the Traefik API/Dashboard (often Port 8080 or Port 8081) directly to the internet without strict Basic Auth or ForwardAuth.
- When using the Docker provider, set `exposedByDefault: false`. This forces you to explicitly add `traefik.enable=true` to the containers you actually want routed, preventing accidental exposure of internal databases.
- Use the `dnsChallenge` instead of `httpChallenge` for Let's Encrypt if your edge router sits behind a firewall or if you need to provision Wildcard SSL certificates.
Common Mistakes
- Confusing the Static Configuration (what this generator creates) with the Dynamic Configuration (routers, services, and middlewares). Traefik needs both.
- Using YAML tabs instead of spaces. Traefik's YAML parser is strict. Ensure your output is properly indented with spaces.
- Forgetting to mount the Docker socket (`/var/run/docker.sock`) into the Traefik container when using the Docker provider, which prevents Traefik from seeing other containers.
Security Recommendations
- Limit the namespaces or Swarm networks that Traefik is allowed to monitor to prevent cross-tenant traffic leakage.
- Mount the ACME storage file (`acme.json`) with strict 600 permissions. If permissions are too loose, Traefik will refuse to start to protect your private keys.
- Enable TLS v1.2 minimum and drop support for outdated ciphers by defining a custom TLS Options block.
Production Tips
- Enable Prometheus metrics in the static config to monitor 4xx/5xx error rates and routing latencies in Grafana.
- Output Traefik access logs in JSON format. This makes it trivial to ingest and query logs in ELK or Datadog.
- For High Availability (HA) across multiple Traefik nodes, you must use a distributed KV store (like Consul or etcd) to store Let's Encrypt certificates, as a local `acme.json` file cannot be shared safely.