3e802d3bdf
Adds a Nix cache proxy which can be used to send a Nix cache lookup to the first available cache that has the given NAR. We will use this for dynamically created builders. Relates to b/432. Change-Id: If970d2393e43ba032b5b7d653f2b92f6ac0eab63 Reviewed-on: https://cl.tvl.fyi/c/depot/+/12949 Tested-by: BuildkiteCI Autosubmit: tazjin <tazjin@tvl.su> Reviewed-by: sterni <sternenseemann@systemli.org>
75 lines
1.6 KiB
Go
75 lines
1.6 KiB
Go
package main
|
|
|
|
import (
|
|
"flag"
|
|
"fmt"
|
|
"log/slog"
|
|
"net/http"
|
|
"os"
|
|
"time"
|
|
|
|
"tvl.fyi/ops/builderball/config"
|
|
"tvl.fyi/ops/builderball/proxy"
|
|
)
|
|
|
|
func printStats() {
|
|
hits, misses := proxy.GetStats()
|
|
if hits > 0 || misses > 0 {
|
|
slog.Info("served cache requests", "hits", hits, "misses", misses)
|
|
}
|
|
}
|
|
|
|
func main() {
|
|
flag.Parse()
|
|
slog.Info("launching builderball proxy", "host", *config.Host, "port", *config.Port)
|
|
|
|
logConfig := slog.HandlerOptions{
|
|
Level: slog.LevelInfo,
|
|
}
|
|
|
|
if *config.Debug {
|
|
logConfig.Level = slog.LevelDebug
|
|
}
|
|
|
|
if *config.JSON {
|
|
logConfig.AddSource = true
|
|
slog.SetDefault(slog.New(slog.NewJSONHandler(os.Stderr, &logConfig)))
|
|
} else {
|
|
slog.SetDefault(slog.New(slog.NewTextHandler(os.Stderr, &logConfig)))
|
|
}
|
|
|
|
slog.Debug("debug logging enabled") // prints only then, of course.
|
|
|
|
if len(config.Caches) > 0 {
|
|
slog.Info("static binary caches configured", "caches", config.Caches)
|
|
}
|
|
|
|
if *config.Tailscale {
|
|
slog.Info("tailscale discovery is enabled", "tag", *config.TSTag)
|
|
} else if len(config.Caches) == 0 {
|
|
slog.Error("no static binary caches configured, and tailscale discovery is disabled")
|
|
os.Exit(1)
|
|
}
|
|
|
|
http.HandleFunc("GET /nix-cache-info", func(w http.ResponseWriter, r *http.Request) {
|
|
fmt.Fprintf(w, `StoreDir: /nix/store
|
|
WantMassQuery: 1
|
|
Priority: %d
|
|
`, *config.Priority)
|
|
})
|
|
|
|
http.HandleFunc("GET /", proxy.Handler)
|
|
|
|
go func() {
|
|
for {
|
|
printStats()
|
|
time.Sleep(time.Duration(*config.Ticker) * time.Second)
|
|
}
|
|
}()
|
|
|
|
err := http.ListenAndServe(fmt.Sprintf("%s:%d", *config.Host, *config.Port), nil)
|
|
if err != nil {
|
|
slog.Error("HTTP server failed", "error", err.Error())
|
|
os.Exit(1)
|
|
}
|
|
}
|