97 lines
2.4 KiB
Go
97 lines
2.4 KiB
Go
// Package rcserver implements the HTTP endpoint to serve the remote control
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package rcserver
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import (
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"context"
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"fmt"
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"net/http"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"github.com/rclone/rclone/fs/accounting"
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"github.com/rclone/rclone/fs/fshttp"
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"github.com/rclone/rclone/fs/rc"
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"github.com/rclone/rclone/fs/rc/jobs"
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libhttp "github.com/rclone/rclone/lib/http"
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)
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const path = "/metrics"
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var promHandlerFunc http.HandlerFunc
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func init() {
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rcloneCollector := accounting.NewRcloneCollector(context.Background())
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prometheus.MustRegister(rcloneCollector)
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m := fshttp.NewMetrics("rclone")
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for _, c := range m.Collectors() {
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prometheus.MustRegister(c)
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}
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fshttp.DefaultMetrics = m
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promHandlerFunc = promhttp.Handler().ServeHTTP
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}
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// MetricsStart the remote control server if configured
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//
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// If the server wasn't configured the *Server returned may be nil
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func MetricsStart(ctx context.Context, opt *rc.Options) (*MetricsServer, error) {
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jobs.SetOpt(opt) // set the defaults for jobs
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if len(opt.MetricsHTTP.ListenAddr) > 0 {
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// Serve on the DefaultServeMux so can have global registrations appear
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s, err := newMetricsServer(ctx, opt)
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if err != nil {
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return nil, err
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}
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return s, s.Serve()
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}
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return nil, nil
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}
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// MetricsServer contains everything to run the rc server
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type MetricsServer struct {
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ctx context.Context // for global config
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server *libhttp.Server
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promHandlerFunc http.Handler
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opt *rc.Options
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}
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func newMetricsServer(ctx context.Context, opt *rc.Options) (*MetricsServer, error) {
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s := &MetricsServer{
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ctx: ctx,
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opt: opt,
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promHandlerFunc: promHandlerFunc,
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}
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var err error
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s.server, err = libhttp.NewServer(ctx,
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libhttp.WithConfig(opt.MetricsHTTP),
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libhttp.WithAuth(opt.MetricsAuth),
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libhttp.WithTemplate(opt.MetricsTemplate),
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)
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if err != nil {
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return nil, fmt.Errorf("failed to init server: %w", err)
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}
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router := s.server.Router()
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router.Get(path, promHandlerFunc)
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return s, nil
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}
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// Serve runs the http server in the background.
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//
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// Use s.Close() and s.Wait() to shutdown server
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func (s *MetricsServer) Serve() error {
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s.server.Serve()
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return nil
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}
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// Wait blocks while the server is serving requests
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func (s *MetricsServer) Wait() {
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s.server.Wait()
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}
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// Shutdown gracefully shuts down the server
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func (s *MetricsServer) Shutdown() error {
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return s.server.Shutdown()
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}
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