spring-boot-traefik

spring-boot-traefik is a cursor rule for Cursor from lsampaioweb/ai-instructions. It costs 0 tokens per session (565 once invoked), scanned A, original, MIT.

A set of rules for routing a Spring Boot service through Traefik. Traefik is a reverse proxy that receives web traffic and forwards it to application containers based on rules such as the requested host name.

In plain words
What is it for?
It guides Docker Compose labels, shared networks, host-based routing, service ports, and Traefik TLS termination settings.
Why use it?
It prevents mismatches between container ports, Docker networks, host rules, and HTTP or HTTPS termination.

Cursor rule for Cursor

Written for Cursor: installed under .cursor/.

Good fit It guides Docker Compose labels, shared networks, host-based routing, service ports, and Traefik TLS termination settings.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/lsampaioweb/ai-instructions/spring-boot-traefik
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/lsampaioweb/ai-instructions

Made for: Cursor.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for spring-boot-traefik

README.md
[![agentmods](https://agentmods.dev/badge/rules/lsampaioweb/ai-instructions/spring-boot-traefik/github.svg)](https://agentmods.dev/rules/lsampaioweb/ai-instructions/spring-boot-traefik)
Your own site
<a href="https://agentmods.dev/rules/lsampaioweb/ai-instructions/spring-boot-traefik"><img src="https://agentmods.dev/badge/rules/lsampaioweb/ai-instructions/spring-boot-traefik/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for spring-boot-traefik

Your own site · 80×15
<a href="https://agentmods.dev/rules/lsampaioweb/ai-instructions/spring-boot-traefik"><img src="https://agentmods.dev/badge/rules/lsampaioweb/ai-instructions/spring-boot-traefik.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 565 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.00565
Opus 5.5 $0.00000 $0.00226
Sonnet 5.5 $0.00000 $0.00113
Haiku 4.5 $0.00000 $0.00056

Measured 14d ago against content hash fda1d9dea434, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

spring-boot-traefik scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 14d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.cursor/rules/spring-boot-traefik.mdc · 54 lines

How it starts

The opening of the file, as written. The whole thing — 54 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Spring Boot Traefik Contract

Apply this contract when a Spring Boot app (or HTTP sidecar UI) is routed through Traefik. Traefik proxy Compose, dashboard, sockets, and cert files stay in the infrastructure runbook for the environment.

Container owns image build, resources, healthchecks, profiles, and generic networks. TLS owns application keystores when the app terminates TLS itself. Actuator and security own health exposure and actuator credentials.

App Compose routing

  • Join the shared external Docker network used by Traefik and the apps it routes.
  • Enable Traefik on the service with traefik.enable=true.
  • Route with an explicit Host rule (for example Host(\app.example.com`)`). Changing a Traefik domain env var does not rewrite these labels — edit the Host rule when the suffix changes.
  • Set traefik.http.services.<name>.loadbalancer.server.port to the container listen port (aligned with the active Spring profile / SERVER_PORT).
  • Default entrypoint is web. For Traefik HTTPS termination, switch to websecure and tls=true together.
  • Keep Traefik → app traffic HTTP on that loadbalancer port. Do not point Traefik at an HTTPS-only app listener unless the deployment explicitly terminates TLS in the app (container TLS-boundary rule).

Traefik-only ingress

When Compose intends Traefik as the only ingress:

  • Do not publish app ports: on the host; Traefik is the entrypath.
  • Keep the Host rule, enable flag, loadbalancer port, and shared-network declarations present and consistent.

Optional service labels

  • HTTP UIs on other infra services may use the same label pattern. Non-HTTP protocols stay on their native ports and are not Traefik-routed.

Forbidden

  • Never expect Traefik to discover an app that is off the shared Traefik network or missing traefik.enable=true.
  • Never publish host ports: for an app that claims Traefik-only ingress.
  • Never leave Host labels on an old domain after changing the DNS suffix without updating those labels.
  • Never point loadbalancer.server.port at a different port than the process actually listens on inside the container.

Read the full file on GitHub · 54 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 14d ago First seen · 54 lines · 0 tokens per session scan A fda1d9dea434

Subscribe to this mod's changes

spring-boot-traefik is a cursor rule published in the GitHub repository lsampaioweb/ai-instructions (1 stars, last pushed 14d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 565 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-04.