TUN-1619: Add flag to test declarative tunnels.

cmd/cloudflared/tunnel/cmd.go

@@ -689,5 +689,11 @@ func tunnelFlags(shouldHide bool) []cli.Flag {
 			EnvVars: []string{"TUNNEL_TRACE_OUTPUT"},
 			Hidden:  shouldHide,
 		}),
+		altsrc.NewBoolFlag(&cli.BoolFlag{
+			Name:    "use-declarative-tunnels",
+			Usage:   "Test establishing connections with declarative tunnel methods.",
+			EnvVars: []string{"TUNNEL_USE_DECLARATIVE"},
+			Hidden:  true,
+		}),
 	}
 }

cmd/cloudflared/tunnel/configuration.go

@@ -243,33 +243,34 @@ func prepareTunnelConfig(
 	}
 
 	return &origin.TunnelConfig{
-		EdgeAddrs:          c.StringSlice("edge"),
-		OriginUrl:          originURL,
-		Hostname:           hostname,
-		OriginCert:         originCert,
-		TlsConfig:          toEdgeTLSConfig,
-		ClientTlsConfig:    httpTransport.TLSClientConfig,
-		Retries:            c.Uint("retries"),
-		HeartbeatInterval:  c.Duration("heartbeat-interval"),
-		MaxHeartbeats:      c.Uint64("heartbeat-count"),
-		ClientID:           clientID,
 		BuildInfo:            buildInfo,
-		ReportedVersion:    version,
-		LBPool:             c.String("lb-pool"),
-		Tags:               tags,
+		ClientID:             clientID,
+		ClientTlsConfig:      httpTransport.TLSClientConfig,
+		CompressionQuality:   c.Uint64("compression-quality"),
+		EdgeAddrs:            c.StringSlice("edge"),
+		GracePeriod:          c.Duration("grace-period"),
 		HAConnections:        c.Int("ha-connections"),
 		HTTPTransport:        httpTransport,
+		HeartbeatInterval:    c.Duration("heartbeat-interval"),
+		Hostname:             hostname,
+		IncidentLookup:       origin.NewIncidentLookup(),
+		IsAutoupdated:        c.Bool("is-autoupdated"),
+		IsFreeTunnel:         isFreeTunnel,
+		LBPool:               c.String("lb-pool"),
+		Logger:               logger,
+		MaxHeartbeats:        c.Uint64("heartbeat-count"),
 		Metrics:              tunnelMetrics,
 		MetricsUpdateFreq:    c.Duration("metrics-update-freq"),
-		TransportLogger:    transportLogger,
-		Logger:             logger,
-		IsAutoupdated:      c.Bool("is-autoupdated"),
-		GracePeriod:        c.Duration("grace-period"),
-		RunFromTerminal:    isRunningFromTerminal(),
 		NoChunkedEncoding:    c.Bool("no-chunked-encoding"),
-		CompressionQuality: c.Uint64("compression-quality"),
-		IncidentLookup:     origin.NewIncidentLookup(),
-		IsFreeTunnel:       isFreeTunnel,
+		OriginCert:           originCert,
+		OriginUrl:            originURL,
+		ReportedVersion:      version,
+		Retries:              c.Uint("retries"),
+		RunFromTerminal:      isRunningFromTerminal(),
+		Tags:                 tags,
+		TlsConfig:            toEdgeTLSConfig,
+		TransportLogger:      transportLogger,
+		UseDeclarativeTunnel: c.Bool("use-declarative-tunnels"),
 	}, nil
 }
 

origin/tunnel.go

@@ -37,41 +37,40 @@ const (
 	lbProbeUserAgentPrefix   = "Mozilla/5.0 (compatible; Cloudflare-Traffic-Manager/1.0; +https://www.cloudflare.com/traffic-manager/;"
 	TagHeaderNamePrefix      = "Cf-Warp-Tag-"
 	DuplicateConnectionError = "EDUPCONN"
-	isDeclarativeTunnel      = false
 )
 
 type TunnelConfig struct {
-	// OriginUrl may not be used if a user specifies a unix socket.
-	OriginUrl string
-
-	EdgeAddrs          []string
-	Hostname           string
-	OriginCert         []byte
-	TlsConfig          *tls.Config
-	ClientTlsConfig    *tls.Config
-	Retries            uint
-	HeartbeatInterval  time.Duration
-	MaxHeartbeats      uint64
-	ClientID           string
 	BuildInfo            *BuildInfo
-	ReportedVersion    string
-	LBPool             string
-	Tags               []tunnelpogs.Tag
+	ClientID             string
+	ClientTlsConfig      *tls.Config
+	CloseConnOnce        *sync.Once // Used to close connectedSignal no more than once
+	CompressionQuality   uint64
+	EdgeAddrs            []string
+	GracePeriod          time.Duration
 	HAConnections        int
 	HTTPTransport        http.RoundTripper
+	HeartbeatInterval    time.Duration
+	Hostname             string
+	IncidentLookup       IncidentLookup
+	IsAutoupdated        bool
+	IsFreeTunnel         bool
+	LBPool               string
+	Logger               *log.Logger
+	MaxHeartbeats        uint64
 	Metrics              *TunnelMetrics
 	MetricsUpdateFreq    time.Duration
-	TransportLogger    *log.Logger
-	Logger             *log.Logger
-	IsAutoupdated      bool
-	GracePeriod        time.Duration
-	RunFromTerminal    bool
 	NoChunkedEncoding    bool
+	OriginCert           []byte
+	ReportedVersion      string
+	Retries              uint
+	RunFromTerminal      bool
+	Tags                 []tunnelpogs.Tag
+	TlsConfig            *tls.Config
+	TransportLogger      *log.Logger
+	UseDeclarativeTunnel bool
 	WSGI                 bool
-	CompressionQuality uint64
-	IncidentLookup     IncidentLookup
-	CloseConnOnce      *sync.Once // Used to close connectedSignal no more than once
-	IsFreeTunnel       bool
+	// OriginUrl may not be used if a user specifies a unix socket.
+	OriginUrl string
 }
 
 type dialError struct {
@@ -153,7 +152,7 @@ func StartTunnelDaemon(config *TunnelConfig, shutdownC <-chan struct{}, connecte
 
 	// If a user specified negative HAConnections, we will treat it as requesting 1 connection
 	if config.HAConnections > 1 {
-		if isDeclarativeTunnel {
+		if config.UseDeclarativeTunnel {
 			return connection.NewSupervisor(&connection.CloudflaredConfig{
 				ConnectionConfig: &connection.ConnectionConfig{
 					TLSConfig:         config.TlsConfig,