TUN-3593: /ready endpoint for k8s readiness. Move tunnel events out of UI package, into connection package.
This commit is contained in:
parent
bda8fe2fbe
commit
38fb0b28b6
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@ -271,18 +271,6 @@ func StartServer(
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// Wait for proxy-dns to come up (if used)
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<-dnsReadySignal
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metricsListener, err := listeners.Listen("tcp", c.String("metrics"))
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if err != nil {
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generalLogger.Errorf("Error opening metrics server listener: %s", err)
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return errors.Wrap(err, "Error opening metrics server listener")
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}
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defer metricsListener.Close()
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wg.Add(1)
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go func() {
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defer wg.Done()
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errC <- metrics.ServeMetrics(metricsListener, shutdownC, generalLogger)
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}()
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go notifySystemd(connectedSignal)
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if c.IsSet("pidfile") {
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go writePidFile(connectedSignal, c.String("pidfile"), generalLogger)
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@ -331,12 +319,30 @@ func StartServer(
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return errors.Wrap(err, "error setting up transport logger")
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}
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tunnelConfig, ingressRules, err := prepareTunnelConfig(c, buildInfo, version, generalLogger, transportLogger, namedTunnel, isUIEnabled)
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readinessCh := make(chan connection.Event, 16)
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uiCh := make(chan connection.Event, 16)
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eventChannels := []chan connection.Event{
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readinessCh,
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uiCh,
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}
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tunnelConfig, ingressRules, err := prepareTunnelConfig(c, buildInfo, version, generalLogger, transportLogger, namedTunnel, isUIEnabled, eventChannels)
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if err != nil {
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generalLogger.Errorf("Couldn't start tunnel: %v", err)
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return err
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}
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metricsListener, err := listeners.Listen("tcp", c.String("metrics"))
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if err != nil {
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generalLogger.Errorf("Error opening metrics server listener: %s", err)
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return errors.Wrap(err, "Error opening metrics server listener")
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}
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defer metricsListener.Close()
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wg.Add(1)
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go func() {
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defer wg.Done()
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errC <- metrics.ServeMetrics(metricsListener, shutdownC, readinessCh, generalLogger)
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}()
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ingressRules.StartOrigins(&wg, generalLogger, shutdownC, errC)
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reconnectCh := make(chan origin.ReconnectSignal, 1)
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@ -363,7 +369,7 @@ func StartServer(
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if err != nil {
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return err
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}
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tunnelInfo.LaunchUI(ctx, generalLogger, transportLogger, logLevels, tunnelConfig.TunnelEventChan)
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tunnelInfo.LaunchUI(ctx, generalLogger, transportLogger, logLevels, uiCh)
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}
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return waitToShutdown(&wg, errC, shutdownC, graceShutdownC, c.Duration("grace-period"), generalLogger)
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@ -10,7 +10,6 @@ import (
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"github.com/cloudflare/cloudflared/cmd/cloudflared/buildinfo"
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"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
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"github.com/cloudflare/cloudflared/cmd/cloudflared/ui"
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"github.com/cloudflare/cloudflared/connection"
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"github.com/cloudflare/cloudflared/edgediscovery"
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"github.com/cloudflare/cloudflared/h2mux"
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@ -160,7 +159,8 @@ func prepareTunnelConfig(
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logger logger.Service,
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transportLogger logger.Service,
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namedTunnel *connection.NamedTunnelConfig,
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uiIsEnabled bool,
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isUIEnabled bool,
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eventChans []chan connection.Event,
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) (*origin.TunnelConfig, ingress.Ingress, error) {
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isNamedTunnel := namedTunnel != nil
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@ -261,11 +261,6 @@ func prepareTunnelConfig(
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MetricsUpdateFreq: c.Duration("metrics-update-freq"),
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}
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var tunnelEventChan chan ui.TunnelEvent
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if uiIsEnabled {
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tunnelEventChan = make(chan ui.TunnelEvent, 16)
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}
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return &origin.TunnelConfig{
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ConnectionConfig: connectionConfig,
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BuildInfo: buildInfo,
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@ -278,14 +273,14 @@ func prepareTunnelConfig(
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LBPool: c.String("lb-pool"),
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Tags: tags,
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Logger: logger,
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Observer: connection.NewObserver(transportLogger, tunnelEventChan),
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Observer: connection.NewObserver(transportLogger, eventChans, isUIEnabled),
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ReportedVersion: version,
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Retries: c.Uint("retries"),
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RunFromTerminal: isRunningFromTerminal(),
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NamedTunnel: namedTunnel,
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ClassicTunnel: classicTunnel,
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MuxerConfig: muxerConfig,
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TunnelEventChan: tunnelEventChan,
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TunnelEventChans: eventChans,
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ProtocolSelector: protocolSelector,
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EdgeTLSConfigs: edgeTLSConfigs,
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}, ingressRules, nil
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@ -6,6 +6,7 @@ import (
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"strings"
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"time"
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"github.com/cloudflare/cloudflared/connection"
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"github.com/cloudflare/cloudflared/ingress"
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"github.com/cloudflare/cloudflared/logger"
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@ -15,24 +16,7 @@ import (
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type connState struct {
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location string
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state status
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}
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type status int
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const (
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Disconnected status = iota
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Connected
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Reconnecting
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SetUrl
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RegisteringTunnel
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)
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type TunnelEvent struct {
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Index uint8
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EventType status
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Location string
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Url string
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state connection.Status
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}
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type uiModel struct {
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@ -69,7 +53,7 @@ func (data *uiModel) LaunchUI(
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ctx context.Context,
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generalLogger, transportLogger logger.Service,
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logLevels []logger.Level,
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tunnelEventChan <-chan TunnelEvent,
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tunnelEventChan <-chan connection.Event,
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) {
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// Configure the logger to stream logs into the textview
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@ -138,14 +122,14 @@ func (data *uiModel) LaunchUI(
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return
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case event := <-tunnelEventChan:
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switch event.EventType {
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case Connected:
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case connection.Connected:
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data.setConnTableCell(event, connTable, palette)
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case Disconnected, Reconnecting:
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case connection.Disconnected, connection.Reconnecting:
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data.changeConnStatus(event, connTable, generalLogger, palette)
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case SetUrl:
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tunnelHostText.SetText(event.Url)
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data.edgeURL = event.Url
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case RegisteringTunnel:
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case connection.SetURL:
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tunnelHostText.SetText(event.URL)
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data.edgeURL = event.URL
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case connection.RegisteringTunnel:
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if data.edgeURL == "" {
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tunnelHostText.SetText("Registering tunnel...")
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}
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@ -175,7 +159,7 @@ func handleNewText(app *tview.Application, logTextView *tview.TextView) func() {
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}
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}
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func (data *uiModel) changeConnStatus(event TunnelEvent, table *tview.Table, logger logger.Service, palette palette) {
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func (data *uiModel) changeConnStatus(event connection.Event, table *tview.Table, logger logger.Service, palette palette) {
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index := int(event.Index)
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// Get connection location and state
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connState := data.getConnState(index)
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@ -187,10 +171,10 @@ func (data *uiModel) changeConnStatus(event TunnelEvent, table *tview.Table, log
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locationState := event.Location
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if event.EventType == Disconnected {
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connState.state = Disconnected
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} else if event.EventType == Reconnecting {
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connState.state = Reconnecting
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if event.EventType == connection.Disconnected {
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connState.state = connection.Disconnected
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} else if event.EventType == connection.Reconnecting {
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connState.state = connection.Reconnecting
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locationState = "Reconnecting..."
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}
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@ -211,12 +195,12 @@ func (data *uiModel) getConnState(connID int) *connState {
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return nil
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}
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func (data *uiModel) setConnTableCell(event TunnelEvent, table *tview.Table, palette palette) {
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func (data *uiModel) setConnTableCell(event connection.Event, table *tview.Table, palette palette) {
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index := int(event.Index)
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connectionNum := index + 1
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// Update slice to keep track of connection location and state in UI table
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data.connections[index].state = Connected
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data.connections[index].state = connection.Connected
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data.connections[index].location = event.Location
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// Update text in table cell to show disconnected state
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@ -225,18 +209,18 @@ func (data *uiModel) setConnTableCell(event TunnelEvent, table *tview.Table, pal
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table.SetCell(index, 0, cell)
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}
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func newCellText(palette palette, connectionNum int, location string, connectedStatus status) string {
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func newCellText(palette palette, connectionNum int, location string, connectedStatus connection.Status) string {
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// HA connection indicator formatted as: "• #<CONNECTION_INDEX>: <COLO>",
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// where the left middle dot's color depends on the status of the connection
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const connFmtString = "[%s]\u2022[%s] #%d: %s"
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var dotColor string
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switch connectedStatus {
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case Connected:
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case connection.Connected:
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dotColor = palette.connected
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case Disconnected:
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case connection.Disconnected:
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dotColor = palette.disconnected
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case Reconnecting:
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case connection.Reconnecting:
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dotColor = palette.reconnecting
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}
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@ -8,7 +8,6 @@ import (
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"testing"
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"time"
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"github.com/cloudflare/cloudflared/cmd/cloudflared/ui"
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"github.com/cloudflare/cloudflared/logger"
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"github.com/gobwas/ws/wsutil"
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"github.com/stretchr/testify/assert"
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@ -28,11 +27,12 @@ var (
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Scheme: "https",
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Host: "connectiontest.argotunnel.com",
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}
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testTunnelEventChan = make(chan ui.TunnelEvent)
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testTunnelEventChan = make(chan Event)
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testObserver = &Observer{
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testLogger,
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m,
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testTunnelEventChan,
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[]chan Event{testTunnelEventChan},
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false,
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}
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testLargeResp = make([]byte, largeFileSize)
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)
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@ -0,0 +1,25 @@
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package connection
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// Event is something that happened to a connection, e.g. disconnection or registration.
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type Event struct {
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Index uint8
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EventType Status
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Location string
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URL string
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}
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// Status is the status of a connection.
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type Status int
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const (
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// Disconnected means the connection to the edge was broken.
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Disconnected Status = iota
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// Connected means the connection to the edge was successfully established.
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Connected
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// Reconnecting means the connection to the edge is being re-established.
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Reconnecting
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// SetURL means this connection's tunnel was given a URL by the edge. Used for free tunnels.
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SetURL
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// RegisteringTunnel means the non-named tunnel is registering its connection.
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RegisteringTunnel
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)
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@ -5,7 +5,6 @@ import (
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"net/url"
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"strings"
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"github.com/cloudflare/cloudflared/cmd/cloudflared/ui"
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"github.com/cloudflare/cloudflared/logger"
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tunnelpogs "github.com/cloudflare/cloudflared/tunnelrpc/pogs"
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)
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@ -13,29 +12,28 @@ import (
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type Observer struct {
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logger.Service
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metrics *tunnelMetrics
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tunnelEventChan chan<- ui.TunnelEvent
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tunnelEventChans []chan Event
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uiEnabled bool
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}
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func NewObserver(logger logger.Service, tunnelEventChan chan<- ui.TunnelEvent) *Observer {
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func NewObserver(logger logger.Service, tunnelEventChans []chan Event, uiEnabled bool) *Observer {
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return &Observer{
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logger,
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newTunnelMetrics(),
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tunnelEventChan,
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tunnelEventChans,
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uiEnabled,
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}
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}
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func (o *Observer) logServerInfo(connIndex uint8, location, msg string) {
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// If launch-ui flag is set, send connect msg
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if o.tunnelEventChan != nil {
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o.tunnelEventChan <- ui.TunnelEvent{Index: connIndex, EventType: ui.Connected, Location: location}
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}
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o.sendEvent(Event{Index: connIndex, EventType: Connected, Location: location})
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o.Infof(msg)
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o.metrics.registerServerLocation(uint8ToString(connIndex), location)
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}
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func (o *Observer) logTrialHostname(registration *tunnelpogs.TunnelRegistration) error {
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// Print out the user's trial zone URL in a nice box (if they requested and got one and UI flag is not set)
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if o.tunnelEventChan == nil {
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if !o.uiEnabled {
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if registrationURL, err := url.Parse(registration.Url); err == nil {
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for _, line := range asciiBox(trialZoneMsg(registrationURL.String()), 2) {
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o.Info(line)
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@ -81,19 +79,27 @@ func trialZoneMsg(url string) []string {
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}
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func (o *Observer) sendRegisteringEvent() {
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if o.tunnelEventChan != nil {
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o.tunnelEventChan <- ui.TunnelEvent{EventType: ui.RegisteringTunnel}
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}
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o.sendEvent(Event{EventType: RegisteringTunnel})
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}
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func (o *Observer) sendConnectedEvent(connIndex uint8, location string) {
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if o.tunnelEventChan != nil {
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o.tunnelEventChan <- ui.TunnelEvent{Index: connIndex, EventType: ui.Connected, Location: location}
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}
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o.sendEvent(Event{Index: connIndex, EventType: Connected, Location: location})
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}
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func (o *Observer) sendURL(url string) {
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if o.tunnelEventChan != nil {
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o.tunnelEventChan <- ui.TunnelEvent{EventType: ui.SetUrl, Url: url}
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o.sendEvent(Event{EventType: SetURL, URL: url})
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}
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func (o *Observer) SendReconnect(connIndex uint8) {
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o.sendEvent(Event{Index: connIndex, EventType: Reconnecting})
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}
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func (o *Observer) SendDisconnect(connIndex uint8) {
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o.sendEvent(Event{Index: connIndex, EventType: Disconnected})
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}
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func (o *Observer) sendEvent(e Event) {
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for _, ch := range o.tunnelEventChans {
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ch <- e
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}
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}
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@ -12,6 +12,7 @@ import (
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"golang.org/x/net/trace"
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"github.com/cloudflare/cloudflared/connection"
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"github.com/cloudflare/cloudflared/logger"
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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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@ -22,22 +23,35 @@ const (
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startupTime = time.Millisecond * 500
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)
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func ServeMetrics(l net.Listener, shutdownC <-chan struct{}, logger logger.Service) (err error) {
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func newMetricsHandler(connectionEvents <-chan connection.Event, log logger.Service) *http.ServeMux {
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readyServer := NewReadyServer(connectionEvents, log)
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mux := http.NewServeMux()
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mux.Handle("/metrics", promhttp.Handler())
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mux.HandleFunc("/healthcheck", func(w http.ResponseWriter, r *http.Request) {
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fmt.Fprintf(w, "OK\n")
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})
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mux.Handle("/ready", readyServer)
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return mux
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}
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func ServeMetrics(
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l net.Listener,
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shutdownC <-chan struct{},
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connectionEvents <-chan connection.Event,
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logger logger.Service,
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) (err error) {
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var wg sync.WaitGroup
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// Metrics port is privileged, so no need for further access control
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trace.AuthRequest = func(*http.Request) (bool, bool) { return true, true }
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// TODO: parameterize ReadTimeout and WriteTimeout. The maximum time we can
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// profile CPU usage depends on WriteTimeout
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h := newMetricsHandler(connectionEvents, logger)
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server := &http.Server{
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ReadTimeout: 10 * time.Second,
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WriteTimeout: 10 * time.Second,
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Handler: h,
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}
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http.Handle("/metrics", promhttp.Handler())
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http.Handle("/healthcheck", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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fmt.Fprintf(w, "OK\n")
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}))
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wg.Add(1)
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go func() {
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defer wg.Done()
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|
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@ -0,0 +1,80 @@
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package metrics
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import (
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"encoding/json"
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"fmt"
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"net/http"
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"sync"
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conn "github.com/cloudflare/cloudflared/connection"
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"github.com/cloudflare/cloudflared/logger"
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)
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// ReadyServer serves HTTP 200 if the tunnel can serve traffic. Intended for k8s readiness checks.
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type ReadyServer struct {
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sync.RWMutex
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isConnected map[int]bool
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log logger.Service
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}
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// NewReadyServer initializes a ReadyServer and starts listening for dis/connection events.
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func NewReadyServer(connectionEvents <-chan conn.Event, log logger.Service) *ReadyServer {
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rs := ReadyServer{
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isConnected: make(map[int]bool, 0),
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log: log,
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}
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go func() {
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for c := range connectionEvents {
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switch c.EventType {
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case conn.Connected:
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rs.Lock()
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rs.isConnected[int(c.Index)] = true
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rs.Unlock()
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case conn.Disconnected, conn.Reconnecting, conn.RegisteringTunnel:
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rs.Lock()
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rs.isConnected[int(c.Index)] = false
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rs.Unlock()
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case conn.SetURL:
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continue
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default:
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rs.log.Errorf("Unknown connection event case %v", c)
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}
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}
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}()
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return &rs
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}
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type body struct {
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Status int `json:"status"`
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ReadyConnections int `json:"readyConnections"`
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}
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// ServeHTTP responds with HTTP 200 if the tunnel is connected to the edge.
|
||||
func (rs *ReadyServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
|
||||
statusCode, readyConnections := rs.makeResponse()
|
||||
w.WriteHeader(statusCode)
|
||||
body := body{
|
||||
Status: statusCode,
|
||||
ReadyConnections: readyConnections,
|
||||
}
|
||||
msg, err := json.Marshal(body)
|
||||
if err != nil {
|
||||
fmt.Fprintf(w, `{"error": "%s"}`, err)
|
||||
}
|
||||
w.Write(msg)
|
||||
}
|
||||
|
||||
// This is the bulk of the logic for ServeHTTP, broken into its own pure function
|
||||
// to make unit testing easy.
|
||||
func (rs *ReadyServer) makeResponse() (statusCode, readyConnections int) {
|
||||
statusCode = http.StatusServiceUnavailable
|
||||
rs.RLock()
|
||||
defer rs.RUnlock()
|
||||
for _, connected := range rs.isConnected {
|
||||
if connected {
|
||||
statusCode = http.StatusOK
|
||||
readyConnections++
|
||||
}
|
||||
}
|
||||
return statusCode, readyConnections
|
||||
}
|
|
@ -0,0 +1,58 @@
|
|||
package metrics
|
||||
|
||||
import (
|
||||
"net/http"
|
||||
"testing"
|
||||
)
|
||||
|
||||
func TestReadyServer_makeResponse(t *testing.T) {
|
||||
type fields struct {
|
||||
isConnected map[int]bool
|
||||
}
|
||||
tests := []struct {
|
||||
name string
|
||||
fields fields
|
||||
wantOK bool
|
||||
wantReadyConnections int
|
||||
}{
|
||||
{
|
||||
name: "One connection online => HTTP 200",
|
||||
fields: fields{
|
||||
isConnected: map[int]bool{
|
||||
0: false,
|
||||
1: false,
|
||||
2: true,
|
||||
3: false,
|
||||
},
|
||||
},
|
||||
wantOK: true,
|
||||
wantReadyConnections: 1,
|
||||
},
|
||||
{
|
||||
name: "No connections online => no HTTP 200",
|
||||
fields: fields{
|
||||
isConnected: map[int]bool{
|
||||
0: false,
|
||||
1: false,
|
||||
2: false,
|
||||
3: false,
|
||||
},
|
||||
},
|
||||
wantReadyConnections: 0,
|
||||
},
|
||||
}
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
rs := &ReadyServer{
|
||||
isConnected: tt.fields.isConnected,
|
||||
}
|
||||
gotStatusCode, gotReadyConnections := rs.makeResponse()
|
||||
if tt.wantOK && gotStatusCode != http.StatusOK {
|
||||
t.Errorf("ReadyServer.makeResponse() gotStatusCode = %v, want ok = %v", gotStatusCode, tt.wantOK)
|
||||
}
|
||||
if gotReadyConnections != tt.wantReadyConnections {
|
||||
t.Errorf("ReadyServer.makeResponse() gotReadyConnections = %v, want %v", gotReadyConnections, tt.wantReadyConnections)
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
|
@ -16,7 +16,6 @@ import (
|
|||
"golang.org/x/sync/errgroup"
|
||||
|
||||
"github.com/cloudflare/cloudflared/cmd/cloudflared/buildinfo"
|
||||
"github.com/cloudflare/cloudflared/cmd/cloudflared/ui"
|
||||
"github.com/cloudflare/cloudflared/connection"
|
||||
"github.com/cloudflare/cloudflared/edgediscovery"
|
||||
"github.com/cloudflare/cloudflared/h2mux"
|
||||
|
@ -65,7 +64,7 @@ type TunnelConfig struct {
|
|||
NamedTunnel *connection.NamedTunnelConfig
|
||||
ClassicTunnel *connection.ClassicTunnelConfig
|
||||
MuxerConfig *connection.MuxerConfig
|
||||
TunnelEventChan chan ui.TunnelEvent
|
||||
TunnelEventChans []chan connection.Event
|
||||
ProtocolSelector connection.ProtocolSelector
|
||||
EdgeTLSConfigs map[connection.Protocol]*tls.Config
|
||||
}
|
||||
|
@ -235,10 +234,7 @@ func waitForBackoff(
|
|||
return err
|
||||
}
|
||||
|
||||
if config.TunnelEventChan != nil {
|
||||
config.TunnelEventChan <- ui.TunnelEvent{Index: connIndex, EventType: ui.Reconnecting}
|
||||
}
|
||||
|
||||
config.Observer.SendReconnect(connIndex)
|
||||
config.Logger.Infof("Retrying connection %d in %s seconds, error %v", connIndex, duration, err)
|
||||
protobackoff.Backoff(ctx)
|
||||
|
||||
|
@ -288,12 +284,7 @@ func ServeTunnel(
|
|||
}
|
||||
}()
|
||||
|
||||
// If launch-ui flag is set, send disconnect msg
|
||||
if config.TunnelEventChan != nil {
|
||||
defer func() {
|
||||
config.TunnelEventChan <- ui.TunnelEvent{Index: connIndex, EventType: ui.Disconnected}
|
||||
}()
|
||||
}
|
||||
defer config.Observer.SendDisconnect(connIndex)
|
||||
|
||||
edgeConn, err := edgediscovery.DialEdge(ctx, dialTimeout, config.EdgeTLSConfigs[protocol], addr)
|
||||
if err != nil {
|
||||
|
|
|
@ -47,6 +47,7 @@ func TestWaitForBackoffFallback(t *testing.T) {
|
|||
config := &TunnelConfig{
|
||||
Logger: logger,
|
||||
ProtocolSelector: protocolSelector,
|
||||
Observer: connection.NewObserver(nil, nil, false),
|
||||
}
|
||||
connIndex := uint8(1)
|
||||
|
||||
|
|
|
@ -80,7 +80,7 @@ func Run(c *cli.Context) error {
|
|||
logger.Fatalf("Failed to open the metrics listener: %s", err)
|
||||
}
|
||||
|
||||
go metrics.ServeMetrics(metricsListener, nil, logger)
|
||||
go metrics.ServeMetrics(metricsListener, nil, nil, logger)
|
||||
|
||||
listener, err := CreateListener(c.String("address"), uint16(c.Uint("port")), c.StringSlice("upstream"), c.StringSlice("bootstrap"), logger)
|
||||
if err != nil {
|
||||
|
|
Loading…
Reference in New Issue