f932c3ced8
* wip overlay cache cmd * overlay cache add and list commands * use zap * fixes * simplify * add restrictions * cleanup * remove defaults for overlay management commands
118 lines
2.5 KiB
Go
118 lines
2.5 KiB
Go
// Copyright (C) 2018 Storj Labs, Inc.
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// See LICENSE for copying information.
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package overlay
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import (
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"context"
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"net/url"
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"strconv"
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"time"
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"github.com/zeebo/errs"
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"go.uber.org/zap"
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monkit "gopkg.in/spacemonkeygo/monkit.v2"
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"storj.io/storj/pkg/kademlia"
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"storj.io/storj/pkg/provider"
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proto "storj.io/storj/protos/overlay"
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)
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var (
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mon = monkit.Package()
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// Error represents an overlay error
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Error = errs.Class("overlay error")
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)
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// Config is a configuration struct for everything you need to start the
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// Overlay cache responsibility.
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type Config struct {
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DatabaseURL string `help:"the database connection string to use" default:"bolt://$CONFDIR/overlay.db"`
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RefreshInterval time.Duration `help:"the interval at which the cache refreshes itself in seconds" default:"30s"`
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}
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// Run implements the provider.Responsibility interface. Run assumes a
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// Kademlia responsibility has been started before this one.
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func (c Config) Run(ctx context.Context, server *provider.Provider) (
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err error) {
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defer mon.Task()(&ctx)(&err)
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kad := kademlia.LoadFromContext(ctx)
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if kad == nil {
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return Error.New("programmer error: kademlia responsibility unstarted")
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}
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dburl, err := url.Parse(c.DatabaseURL)
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if err != nil {
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return Error.Wrap(err)
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}
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var cache *Cache
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switch dburl.Scheme {
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case "bolt":
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cache, err = NewBoltOverlayCache(dburl.Path, kad)
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if err != nil {
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return err
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}
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zap.S().Info("Starting overlay cache with BoltDB")
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case "redis":
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db, err := strconv.Atoi(dburl.Query().Get("db"))
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if err != nil {
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return Error.New("invalid db: %s", err)
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}
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cache, err = NewRedisOverlayCache(dburl.Host, UrlPwd(dburl), db, kad)
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if err != nil {
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return err
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}
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zap.S().Info("Starting overlay cache with Redis")
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default:
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return Error.New("database scheme not supported: %s", dburl.Scheme)
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}
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err = cache.Bootstrap(ctx)
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if err != nil {
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return err
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}
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ticker := time.NewTicker(time.Duration(c.RefreshInterval))
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defer ticker.Stop()
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ctx, cancel := context.WithCancel(ctx)
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defer cancel()
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go func() {
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for {
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select {
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case <-ticker.C:
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err := cache.Refresh(ctx)
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if err != nil {
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zap.S().Error("Error with cache refresh: ", err)
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}
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case <-ctx.Done():
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return
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}
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}
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}()
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proto.RegisterOverlayServer(server.GRPC(), &Server{
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dht: kad,
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cache: cache,
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// TODO(jt): do something else
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logger: zap.L(),
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metrics: monkit.Default,
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})
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return server.Run(ctx)
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}
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func UrlPwd(u *url.URL) string {
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if u == nil || u.User == nil {
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return ""
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}
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if pw, ok := u.User.Password(); ok {
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return pw
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}
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return ""
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}
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