Armbian Redirector

This repository contains a redirect service for Armbian downloads, apt, etc.

It uses multiple current technologies and best practices, including:

• Go 1.17/1.18
• GeoIP + Distance routing
• Server weighting, pooling (top x servers are served instead of a single one)
• Health checks (HTTP, TLS)

Code Quality

The code quality isn't the greatest/top tier. All code lives in the "main" package and should be moved at some point.

Regardless, it is meant to be simple and easy to understand.

Configuration

Modes

Redirect

Standard redirect functionality

Download Mapping

Uses the dl_map configuration variable to enable mapping of paths to new paths.

Think symlinks, but in a generated file.

Mirrors

Mirror targets with trailing slash are placed in the yaml configuration file.

Example YAML

# GeoIP Database Path
geodb: GeoLite2-City.mmdb

# Comment out to disable
dl_map: userdata.csv

# LRU Cache Size (in items)
cacheSize: 1024

# Server definition
# Weights are just like nginx, where if it's > 1 it'll be chosen x out of x + total times
# By default, the top 3 servers are used for choosing the best.
# server = full url or host+path
# weight = int
# optional: latitude, longitude (float)
servers:
  - server: armbian.12z.eu/apt/
  - server: armbian.chi.auroradev.org/apt/
    weight: 15
    latitude: 41.8879
    longitude: -88.1995

API

/status

Meant for a simple health check (nginx/etc can 502 or similar if down)

/reload

Flushes cache and reloads configuration and mapping. Requires reloadToken to be set in the configuration, and a matching token provided in Authorization: Bearer TOKEN

/mirrors

Shows all mirrors in the legacy (by region) format

/mirrors.json

Shows all mirrors in the new JSON format. Example:

[
  {
    "available":true,
    "host":"imola.armbian.com",
    "path":"/apt/",
    "latitude":46.0503,
    "longitude":14.5046,
    "weight":10,
    "continent":"EU",
    "lastChange":"2022-08-12T06:52:35.029565986Z"
  }
]

/mirrors/{server}.svg

Magic SVG path to show badges based on server status, for use in dynamic mirror lists.

/dl_map

Shows json-encoded download mappings

/geoip

Shows GeoIP information for the requester

/region/REGIONCODE/PATH

Using this magic path will redirect to the desired region:

• NA - North America
• EU - Europe
• AS - Asia

/metrics

Prometheus metrics endpoint. Metrics aren't considered private, thus are exposed to the public.