Unify all operations within same connection into span

go.mod

@@ -7,6 +7,7 @@ require (
 	github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0
 	github.com/mattn/go-shellwords v1.0.11
 	github.com/mikesmitty/edkey v0.0.0-20170222072505-3356ea4e686a
+	github.com/opentracing/opentracing-go v1.2.0 // indirect
 	github.com/otiai10/copy v1.4.2
 	github.com/pires/go-proxyproto v0.6.0
 	github.com/prometheus/client_golang v1.10.0

internal/sshd/sshd.go

@@ -12,6 +12,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/opentracing/opentracing-go"
 	"github.com/pires/go-proxyproto"
 	"golang.org/x/crypto/ssh"
 
@@ -216,6 +217,9 @@ func (s *Server) handleConn(ctx context.Context, nconn net.Conn) {
 	ctx, cancel := context.WithCancel(correlation.ContextWithCorrelation(ctx, correlation.SafeRandomID()))
 	defer cancel()
 
+	span, ctx := opentracing.StartSpanFromContext(ctx, "SSH connection")
+	defer span.Finish()
+
 	sconn, chans, reqs, err := ssh.NewServerConn(nconn, s.serverConfig(ctx))
 	if err != nil {
 		log.WithError(err).Info("Failed to initialize SSH connection")