Rewrite to add weighting and caching
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This commit is contained in:
parent
13f95ee895
commit
6c52d1a5b2
206
config.go
Normal file
206
config.go
Normal file
@ -0,0 +1,206 @@
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package main
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import (
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lru "github.com/hashicorp/golang-lru"
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"github.com/oschwald/maxminddb-golang"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promauto"
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log "github.com/sirupsen/logrus"
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"github.com/spf13/viper"
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"net"
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"net/url"
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"strings"
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"sync"
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)
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func reloadConfig() {
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err := viper.ReadInConfig() // Find and read the config file
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if err != nil { // Handle errors reading the config file
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log.WithError(err).Fatalln("Unable to load config file")
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}
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// db will never be reloaded.
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if db == nil {
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// Load maxmind database
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db, err = maxminddb.Open(viper.GetString("geodb"))
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if err != nil {
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log.WithError(err).Fatalln("Unable to open database")
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}
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}
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// Refresh server cache if size changed
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if serverCache == nil {
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serverCache, err = lru.New(viper.GetInt("cacheSize"))
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} else {
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serverCache.Resize(viper.GetInt("cacheSize"))
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}
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// Set top choice count
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topChoices = viper.GetInt("topChoices")
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// Reload map file
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reloadMap()
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// Reload server list
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reloadServers()
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// Check top choices size
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if topChoices > len(servers) {
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topChoices = len(servers)
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}
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// Force check
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go servers.Check()
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}
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func reloadServers() {
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var serverList []ServerConfig
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viper.UnmarshalKey("servers", &serverList)
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var wg sync.WaitGroup
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existing := make(map[string]int)
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for i, server := range servers {
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existing[server.Host] = i
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}
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hosts := make(map[string]bool)
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for _, server := range serverList {
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wg.Add(1)
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var prefix string
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if !strings.HasPrefix(server.Server, "http") {
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prefix = "https://"
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}
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u, err := url.Parse(prefix + server.Server)
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if err != nil {
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log.WithFields(log.Fields{
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"error": err,
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"server": server,
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}).Warning("Server is invalid")
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return
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}
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hosts[u.Host] = true
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i := -1
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if v, exists := existing[u.Host]; exists {
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i = v
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}
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go func(i int, server ServerConfig, u *url.URL) {
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defer wg.Done()
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s := addServer(server, u)
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if _, ok := existing[u.Host]; ok {
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s.Redirects = servers[i].Redirects
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servers[i] = s
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} else {
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s.Redirects = promauto.NewCounter(prometheus.CounterOpts{
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Name: "armbian_router_redirects_" + metricReplacer.Replace(u.Host),
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Help: "The number of redirects for server " + u.Host,
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})
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servers = append(servers, s)
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log.WithFields(log.Fields{
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"server": u.Host,
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"path": u.Path,
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"latitude": s.Latitude,
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"longitude": s.Longitude,
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}).Info("Added server")
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}
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}(i, server, u)
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}
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wg.Wait()
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// Remove servers that no longer exist in the config
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for i := len(servers) - 1; i >= 0; i-- {
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if _, exists := hosts[servers[i].Host]; exists {
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continue
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}
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log.WithFields(log.Fields{
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"server": servers[i].Host,
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}).Info("Removed server")
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servers = append(servers[:i], servers[i+1:]...)
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}
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}
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var metricReplacer = strings.NewReplacer(".", "_", "-", "_")
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// addServer takes ServerConfig and constructs a server.
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// This will create duplicate servers, but it will overwrite existing ones when changed.
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func addServer(server ServerConfig, u *url.URL) *Server {
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s := &Server{
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Available: true,
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Host: u.Host,
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Path: u.Path,
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Latitude: server.Latitude,
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Longitude: server.Longitude,
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Weight: server.Weight,
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}
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if s.Weight == 0 {
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s.Weight = 1
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}
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if s.Latitude == 0 && s.Longitude == 0 {
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ips, err := net.LookupIP(u.Host)
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if err != nil {
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log.WithFields(log.Fields{
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"error": err,
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"server": s.Host,
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}).Warning("Could not resolve address")
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return nil
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}
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var city City
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err = db.Lookup(ips[0], &city)
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if err != nil {
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log.WithFields(log.Fields{
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"error": err,
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"server": s.Host,
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"ip": ips[0],
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}).Warning("Could not geolocate address")
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return nil
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}
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s.Latitude = city.Location.Latitude
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s.Longitude = city.Location.Longitude
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}
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return s
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}
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func reloadMap() {
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mapFile := viper.GetString("dl_map")
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if mapFile == "" {
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return
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}
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log.WithField("file", mapFile).Info("Loading download map")
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newMap, err := loadMap(mapFile)
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if err != nil {
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return
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}
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dlMap = newMap
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}
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geodb: GeoIP2-City.mmdb
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# GeoIP Database Path
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geodb: GeoLite2-City.mmdb
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# LRU Cache Size (in items)
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cacheSize: 1024
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# Server definition
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# Weights are just like nginx, where if it's > 1 it'll be chosen x out of x + total times
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# By default, the top 3 servers are used for choosing the best.
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# server = full url or host+path
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# weight = int
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# optional: latitude, longitude (float)
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servers:
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- https://mirrors.tuna.tsinghua.edu.cn/armbian-releases/
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- https://mirrors.bfsu.edu.cn/armbian-releases/
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- https://mirrors.nju.edu.cn/armbian-releases/
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- https://mirrors.ustc.edu.cn/armbian-dl/
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- https://mirror.12z.eu/pub/linux/armbian/dl/
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- https://armbian.tnahosting.net/dl/
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- https://stpete-mirror.armbian.com/dl/
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- https://mirror.armbian.de/dl/
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- https://mirrors.netix.net/armbian/dl/
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- https://mirrors.dotsrc.org/armbian-dl/
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- https://armbian.hosthatch.com/dl/
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- https://xogium.performanceservers.nl/dl/
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- https://github.com/armbian/mirror/releases/download/
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- server: armbian.12z.eu/apt/
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- server: armbian.chi.auroradev.org/apt/
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weight: 5
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latitude: 41.8879
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longitude: -88.1995
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- server: armbian.hosthatch.com/apt/
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- server: armbian.lv.auroradev.org/apt/
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weight: 5
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- server: armbian.site-meganet.com/apt/
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- server: armbian.systemonachip.net/apt/
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- server: armbian.tnahosting.net/apt/
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weight: 5
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- server: au-mirror.bret.dk/armbian/apt/
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- server: es-mirror.bret.dk/armbian/apt/
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- server: imola.armbian.com/apt/
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- server: mirror.iscas.ac.cn/armbian/
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- server: mirror.sjtu.edu.cn/armbian/
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- server: mirrors.aliyun.com/armbian/
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- server: mirrors.bfsu.edu.cn/armbian/
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- server: mirrors.dotsrc.org/armbian-apt/
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weight: 5
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- server: mirrors.netix.net/armbian/apt/
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- server: mirrors.nju.edu.cn/armbian/
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- server: mirrors.sustech.edu.cn/armbian/
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- server: mirrors.tuna.tsinghua.edu.cn/armbian/
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- server: mirrors.ustc.edu.cn/armbian/
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- server: mirrors.xtom.de/armbian/
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- server: sg-mirror.bret.dk/armbian/apt/
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- server: stpete-mirror.armbian.com/apt/
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- server: xogium.performanceservers.nl/apt/
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2
go.mod
2
go.mod
@ -5,6 +5,8 @@ go 1.17
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require (
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github.com/chi-middleware/logrus-logger v0.2.0
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github.com/go-chi/chi/v5 v5.0.7
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github.com/hashicorp/golang-lru v0.5.4
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github.com/jmcvetta/randutil v0.0.0-20150817122601-2bb1b664bcff
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github.com/oschwald/maxminddb-golang v1.8.0
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github.com/prometheus/client_golang v1.11.0
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github.com/sirupsen/logrus v1.8.1
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3
go.sum
3
go.sum
@ -224,6 +224,7 @@ github.com/hashicorp/go-uuid v1.0.0/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/b
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github.com/hashicorp/go-uuid v1.0.1/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/bN7x4byOro=
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github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
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github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
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github.com/hashicorp/golang-lru v0.5.4 h1:YDjusn29QI/Das2iO9M0BHnIbxPeyuCHsjMW+lJfyTc=
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github.com/hashicorp/golang-lru v0.5.4/go.mod h1:iADmTwqILo4mZ8BN3D2Q6+9jd8WM5uGBxy+E8yxSoD4=
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github.com/hashicorp/hcl v1.0.0 h1:0Anlzjpi4vEasTeNFn2mLJgTSwt0+6sfsiTG8qcWGx4=
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github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
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@ -234,6 +235,8 @@ github.com/hashicorp/serf v0.9.6/go.mod h1:TXZNMjZQijwlDvp+r0b63xZ45H7JmCmgg4gpT
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github.com/iancoleman/strcase v0.2.0/go.mod h1:iwCmte+B7n89clKwxIoIXy/HfoL7AsD47ZCWhYzw7ho=
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github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
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github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
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github.com/jmcvetta/randutil v0.0.0-20150817122601-2bb1b664bcff h1:6NvhExg4omUC9NfA+l4Oq3ibNNeJUdiAF3iBVB0PlDk=
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github.com/jmcvetta/randutil v0.0.0-20150817122601-2bb1b664bcff/go.mod h1:ddfPX8Z28YMjiqoaJhNBzWHapTHXejnB5cDCUWDwriw=
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github.com/jpillora/backoff v1.0.0/go.mod h1:J/6gKK9jxlEcS3zixgDgUAsiuZ7yrSoa/FX5e0EB2j4=
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github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
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github.com/json-iterator/go v1.1.9/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
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|
137
main.go
137
main.go
@ -4,19 +4,16 @@ import (
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"flag"
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"github.com/chi-middleware/logrus-logger"
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"github.com/go-chi/chi/v5"
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lru "github.com/hashicorp/golang-lru"
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"github.com/oschwald/maxminddb-golang"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promauto"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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log "github.com/sirupsen/logrus"
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"github.com/spf13/viper"
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"net"
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"net/http"
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"net/url"
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"os"
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"os/signal"
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"strings"
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"sync"
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"syscall"
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)
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@ -35,6 +32,10 @@ var (
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Name: "armbian_router_download_maps",
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Help: "The total number of mapped download paths",
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})
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serverCache *lru.Cache
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topChoices int
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)
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// City represents a MaxmindDB city
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@ -45,6 +46,13 @@ type City struct {
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} `maxminddb:"location"`
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}
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type ServerConfig struct {
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Server string `mapstructure:"server" yaml:"server"`
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Latitude float64 `mapstructure:"latitude" yaml:"latitude"`
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Longitude float64 `mapstructure:"longitude" yaml:"longitude"`
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Weight int `mapstructure:"weight" yaml:"weight"`
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}
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var (
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configFlag = flag.String("config", "", "configuration file path")
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)
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@ -53,6 +61,8 @@ func main() {
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flag.Parse()
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viper.SetDefault("bind", ":8080")
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viper.SetDefault("cacheSize", 1024)
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viper.SetDefault("topChoices", 3)
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viper.SetConfigName("dlrouter") // name of config file (without extension)
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viper.SetConfigType("yaml") // REQUIRED if the config file does not have the extension in the name
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@ -64,43 +74,7 @@ func main() {
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viper.SetConfigFile(*configFlag)
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}
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err := viper.ReadInConfig() // Find and read the config file
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|
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if err != nil { // Handle errors reading the config file
|
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log.WithError(err).Fatalln("Unable to load config file")
|
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}
|
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|
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db, err = maxminddb.Open(viper.GetString("geodb"))
|
||||
|
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if err != nil {
|
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log.WithError(err).Fatalln("Unable to open database")
|
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}
|
||||
|
||||
if mapFile := viper.GetString("dl_map"); mapFile != "" {
|
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log.WithField("file", mapFile).Info("Loading download map")
|
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|
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dlMap, err = loadMap(mapFile)
|
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|
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if err != nil {
|
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log.WithError(err).Fatalln("Unable to load download map")
|
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}
|
||||
}
|
||||
|
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serverList := viper.GetStringSlice("servers")
|
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|
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var wg sync.WaitGroup
|
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|
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for _, server := range serverList {
|
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wg.Add(1)
|
||||
|
||||
go func(server string) {
|
||||
defer wg.Done()
|
||||
|
||||
addServer(server)
|
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}(server)
|
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}
|
||||
|
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wg.Wait()
|
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reloadConfig()
|
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|
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log.Info("Servers added, checking statuses")
|
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|
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@ -135,85 +109,6 @@ func main() {
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break
|
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}
|
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|
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reloadMap()
|
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reloadConfig()
|
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}
|
||||
}
|
||||
|
||||
var metricReplacer = strings.NewReplacer(".", "_", "-", "_")
|
||||
|
||||
func addServer(server string) {
|
||||
var prefix string
|
||||
|
||||
if !strings.HasPrefix(server, "http") {
|
||||
prefix = "https://"
|
||||
}
|
||||
|
||||
u, err := url.Parse(prefix + server)
|
||||
|
||||
if err != nil {
|
||||
log.WithFields(log.Fields{
|
||||
"error": err,
|
||||
"server": server,
|
||||
}).Warning("Server is invalid")
|
||||
return
|
||||
}
|
||||
|
||||
ips, err := net.LookupIP(u.Host)
|
||||
|
||||
if err != nil {
|
||||
log.WithFields(log.Fields{
|
||||
"error": err,
|
||||
"server": server,
|
||||
}).Warning("Could not resolve address")
|
||||
return
|
||||
}
|
||||
|
||||
var city City
|
||||
err = db.Lookup(ips[0], &city)
|
||||
|
||||
if err != nil {
|
||||
log.WithFields(log.Fields{
|
||||
"error": err,
|
||||
"server": server,
|
||||
}).Warning("Could not geolocate address")
|
||||
return
|
||||
}
|
||||
|
||||
redirects := promauto.NewCounter(prometheus.CounterOpts{
|
||||
Name: "armbian_router_redirects_" + metricReplacer.Replace(u.Host),
|
||||
Help: "The number of redirects for server " + u.Host,
|
||||
})
|
||||
|
||||
servers = append(servers, &Server{
|
||||
Host: u.Host,
|
||||
Path: u.Path,
|
||||
Latitude: city.Location.Latitude,
|
||||
Longitude: city.Location.Longitude,
|
||||
Redirects: redirects,
|
||||
})
|
||||
|
||||
log.WithFields(log.Fields{
|
||||
"server": u.Host,
|
||||
"path": u.Path,
|
||||
"latitude": city.Location.Latitude,
|
||||
"longitude": city.Location.Longitude,
|
||||
}).Info("Added server")
|
||||
}
|
||||
|
||||
func reloadMap() {
|
||||
mapFile := viper.GetString("dl_map")
|
||||
|
||||
if mapFile == "" {
|
||||
return
|
||||
}
|
||||
|
||||
log.WithField("file", mapFile).Info("Loading download map")
|
||||
|
||||
newMap, err := loadMap(mapFile)
|
||||
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
|
||||
dlMap = newMap
|
||||
}
|
||||
|
66
servers.go
66
servers.go
@ -1,12 +1,14 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"github.com/jmcvetta/randutil"
|
||||
"github.com/prometheus/client_golang/prometheus"
|
||||
log "github.com/sirupsen/logrus"
|
||||
"math"
|
||||
"net"
|
||||
"net/http"
|
||||
"runtime"
|
||||
"sort"
|
||||
"strings"
|
||||
"sync"
|
||||
"time"
|
||||
@ -24,6 +26,7 @@ type Server struct {
|
||||
Path string
|
||||
Latitude float64
|
||||
Longitude float64
|
||||
Weight int
|
||||
Redirects prometheus.Counter
|
||||
}
|
||||
|
||||
@ -86,8 +89,8 @@ func (s ServerList) checkLoop() {
|
||||
t := time.NewTicker(60 * time.Second)
|
||||
|
||||
for {
|
||||
s.Check()
|
||||
<-t.C
|
||||
s.Check()
|
||||
}
|
||||
}
|
||||
|
||||
@ -110,9 +113,38 @@ func (s ServerList) Check() {
|
||||
wg.Wait()
|
||||
}
|
||||
|
||||
// Closest will use GeoIP on the IP provided and find the closest server.
|
||||
// ComputedDistance is a wrapper that contains a Server and Distance.
|
||||
type ComputedDistance struct {
|
||||
Server *Server
|
||||
Distance float64
|
||||
}
|
||||
|
||||
// DistanceList is a list of Computed Distances with an easy "Choices" func
|
||||
type DistanceList []ComputedDistance
|
||||
|
||||
func (d DistanceList) Choices() []randutil.Choice {
|
||||
c := make([]randutil.Choice, len(d))
|
||||
|
||||
for i, item := range d {
|
||||
c[i] = randutil.Choice{
|
||||
Weight: item.Server.Weight,
|
||||
Item: item,
|
||||
}
|
||||
}
|
||||
|
||||
return c
|
||||
}
|
||||
|
||||
// Closest will use GeoIP on the IP provided and find the closest servers.
|
||||
// When we have a list of x servers closest, we can choose a random or weighted one.
|
||||
// Return values are the closest server, the distance, and if an error occurred.
|
||||
func (s ServerList) Closest(ip net.IP) (*Server, float64, error) {
|
||||
i, exists := serverCache.Get(ip.String())
|
||||
|
||||
if exists {
|
||||
return i.(ComputedDistance).Server, i.(ComputedDistance).Distance, nil
|
||||
}
|
||||
|
||||
var city City
|
||||
err := db.Lookup(ip, &city)
|
||||
|
||||
@ -120,23 +152,35 @@ func (s ServerList) Closest(ip net.IP) (*Server, float64, error) {
|
||||
return nil, -1, err
|
||||
}
|
||||
|
||||
var closest *Server
|
||||
var closestDistance float64 = -1
|
||||
c := make(DistanceList, len(s))
|
||||
|
||||
for _, server := range s {
|
||||
for i, server := range s {
|
||||
if !server.Available {
|
||||
continue
|
||||
}
|
||||
|
||||
distance := Distance(city.Location.Latitude, city.Location.Longitude, server.Latitude, server.Longitude)
|
||||
|
||||
if closestDistance == -1 || distance < closestDistance {
|
||||
closestDistance = distance
|
||||
closest = server
|
||||
c[i] = ComputedDistance{
|
||||
Server: server,
|
||||
Distance: Distance(city.Location.Latitude, city.Location.Longitude, server.Latitude, server.Longitude),
|
||||
}
|
||||
}
|
||||
|
||||
return closest, closestDistance, nil
|
||||
// Sort by distance
|
||||
sort.Slice(s, func(i int, j int) bool {
|
||||
return c[i].Distance < c[j].Distance
|
||||
})
|
||||
|
||||
choice, err := randutil.WeightedChoice(c[0:topChoices].Choices())
|
||||
|
||||
if err != nil {
|
||||
return nil, -1, err
|
||||
}
|
||||
|
||||
dist := choice.Item.(ComputedDistance)
|
||||
|
||||
serverCache.Add(ip.String(), dist)
|
||||
|
||||
return dist.Server, dist.Distance, nil
|
||||
}
|
||||
|
||||
// haversin(θ) function
|
||||
|
Loading…
Reference in New Issue
Block a user