1103 lines
36 KiB
Go
1103 lines
36 KiB
Go
package tunnel
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import (
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"bufio"
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"context"
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"fmt"
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"io/ioutil"
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"net/url"
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"os"
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"runtime/trace"
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"strings"
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"sync"
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"time"
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"github.com/coreos/go-systemd/daemon"
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"github.com/facebookgo/grace/gracenet"
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"github.com/getsentry/raven-go"
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"github.com/google/uuid"
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homedir "github.com/mitchellh/go-homedir"
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"github.com/pkg/errors"
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"github.com/rs/zerolog"
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"github.com/urfave/cli/v2"
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"github.com/urfave/cli/v2/altsrc"
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"github.com/cloudflare/cloudflared/cfapi"
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"github.com/cloudflare/cloudflared/cmd/cloudflared/cliutil"
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"github.com/cloudflare/cloudflared/cmd/cloudflared/proxydns"
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"github.com/cloudflare/cloudflared/cmd/cloudflared/updater"
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"github.com/cloudflare/cloudflared/config"
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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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"github.com/cloudflare/cloudflared/metrics"
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"github.com/cloudflare/cloudflared/orchestration"
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"github.com/cloudflare/cloudflared/signal"
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"github.com/cloudflare/cloudflared/supervisor"
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"github.com/cloudflare/cloudflared/tlsconfig"
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"github.com/cloudflare/cloudflared/tunneldns"
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)
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const (
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sentryDSN = "https://56a9c9fa5c364ab28f34b14f35ea0f1b:3e8827f6f9f740738eb11138f7bebb68@sentry.io/189878"
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// sshPortFlag is the port on localhost the cloudflared ssh server will run on
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sshPortFlag = "local-ssh-port"
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// sshIdleTimeoutFlag defines the duration a SSH session can remain idle before being closed
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sshIdleTimeoutFlag = "ssh-idle-timeout"
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// sshMaxTimeoutFlag defines the max duration a SSH session can remain open for
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sshMaxTimeoutFlag = "ssh-max-timeout"
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// bucketNameFlag is the bucket name to use for the SSH log uploader
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bucketNameFlag = "bucket-name"
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// regionNameFlag is the AWS region name to use for the SSH log uploader
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regionNameFlag = "region-name"
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// secretIDFlag is the Secret id of SSH log uploader
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secretIDFlag = "secret-id"
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// accessKeyIDFlag is the Access key id of SSH log uploader
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accessKeyIDFlag = "access-key-id"
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// sessionTokenIDFlag is the Session token of SSH log uploader
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sessionTokenIDFlag = "session-token"
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// s3URLFlag is the S3 URL of SSH log uploader (e.g. don't use AWS s3 and use google storage bucket instead)
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s3URLFlag = "s3-url-host"
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// hostKeyPath is the path of the dir to save SSH host keys too
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hostKeyPath = "host-key-path"
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// uiFlag is to enable launching cloudflared in interactive UI mode
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uiFlag = "ui"
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debugLevelWarning = "At debug level cloudflared will log request URL, method, protocol, content length, as well as, all request and response headers. " +
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"This can expose sensitive information in your logs."
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LogFieldCommand = "command"
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LogFieldExpandedPath = "expandedPath"
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LogFieldPIDPathname = "pidPathname"
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LogFieldTmpTraceFilename = "tmpTraceFilename"
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LogFieldTraceOutputFilepath = "traceOutputFilepath"
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tunnelCmdErrorMessage = `You did not specify any valid additional argument to the cloudflared tunnel command.
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If you are trying to run a Quick Tunnel then you need to explicitly pass the --url flag.
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Eg. cloudflared tunnel --url localhost:8080/.
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Please note that Quick Tunnels are meant to be ephemeral and should only be used for testing purposes.
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For production usage, we recommend creating Named Tunnels. (https://developers.cloudflare.com/cloudflare-one/connections/connect-apps/install-and-setup/tunnel-guide/)
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`
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)
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var (
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graceShutdownC chan struct{}
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buildInfo *cliutil.BuildInfo
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routeFailMsg = fmt.Sprintf("failed to provision routing, please create it manually via Cloudflare dashboard or UI; "+
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"most likely you already have a conflicting record there. You can also rerun this command with --%s to overwrite "+
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"any existing DNS records for this hostname.", overwriteDNSFlag)
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)
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func Flags() []cli.Flag {
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return tunnelFlags(true)
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}
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func Commands() []*cli.Command {
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subcommands := []*cli.Command{
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buildLoginSubcommand(false),
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buildCreateCommand(),
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buildRouteCommand(),
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buildVirtualNetworkSubcommand(false),
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buildRunCommand(),
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buildListCommand(),
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buildInfoCommand(),
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buildIngressSubcommand(),
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buildDeleteCommand(),
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buildCleanupCommand(),
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buildTokenCommand(),
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// for compatibility, allow following as tunnel subcommands
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proxydns.Command(true),
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cliutil.RemovedCommand("db-connect"),
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}
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return []*cli.Command{
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buildTunnelCommand(subcommands),
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// for compatibility, allow following as top-level subcommands
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buildLoginSubcommand(true),
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cliutil.RemovedCommand("db-connect"),
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}
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}
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func buildTunnelCommand(subcommands []*cli.Command) *cli.Command {
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return &cli.Command{
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Name: "tunnel",
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Action: cliutil.ConfiguredAction(TunnelCommand),
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Category: "Tunnel",
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Usage: "Use Cloudflare Tunnel to expose private services to the Internet or to Cloudflare connected private users.",
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ArgsUsage: " ",
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Description: ` Cloudflare Tunnel allows to expose private services without opening any ingress port on this machine. It can expose:
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A) Locally reachable HTTP-based private services to the Internet on DNS with Cloudflare as authority (which you can
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then protect with Cloudflare Access).
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B) Locally reachable TCP/UDP-based private services to Cloudflare connected private users in the same account, e.g.,
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those enrolled to a Zero Trust WARP Client.
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You can manage your Tunnels via dash.teams.cloudflare.com. This approach will only require you to run a single command
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later in each machine where you wish to run a Tunnel.
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Alternatively, you can manage your Tunnels via the command line. Begin by obtaining a certificate to be able to do so:
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$ cloudflared tunnel login
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With your certificate installed you can then get started with Tunnels:
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$ cloudflared tunnel create my-first-tunnel
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$ cloudflared tunnel route dns my-first-tunnel my-first-tunnel.mydomain.com
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$ cloudflared tunnel run --hello-world my-first-tunnel
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You can now access my-first-tunnel.mydomain.com and be served an example page by your local cloudflared process.
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For exposing local TCP/UDP services by IP to your privately connected users, check out:
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$ cloudflared tunnel route ip --help
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See https://developers.cloudflare.com/cloudflare-one/connections/connect-apps/install-and-setup/tunnel-guide/ for more info.`,
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Subcommands: subcommands,
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Flags: tunnelFlags(false),
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}
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}
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func TunnelCommand(c *cli.Context) error {
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sc, err := newSubcommandContext(c)
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if err != nil {
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return err
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}
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if name := c.String("name"); name != "" { // Start a named tunnel
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return runAdhocNamedTunnel(sc, name, c.String(CredFileFlag))
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}
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// Unauthenticated named tunnel on <random>.<quick-tunnels-service>.com
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shouldRunQuickTunnel := c.IsSet("url") || c.IsSet("hello-world")
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if !dnsProxyStandAlone(c, nil) && c.String("hostname") == "" && c.String("quick-service") != "" && shouldRunQuickTunnel {
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return RunQuickTunnel(sc)
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}
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if ref := config.GetConfiguration().TunnelID; ref != "" {
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return fmt.Errorf("Use `cloudflared tunnel run` to start tunnel %s", ref)
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}
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// Start a classic tunnel if hostname is specified.
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if c.String("hostname") != "" {
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return runClassicTunnel(sc)
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}
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if c.String("proxy-dns") != "" {
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// NamedTunnelProperties are nil since proxy dns server does not need it.
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// This is supported for legacy reasons: dns proxy server is not a tunnel and ideally should
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// not run as part of cloudflared tunnel.
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return StartServer(sc.c, buildInfo, nil, sc.log)
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}
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return errors.New(tunnelCmdErrorMessage)
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}
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func Init(info *cliutil.BuildInfo, gracefulShutdown chan struct{}) {
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buildInfo, graceShutdownC = info, gracefulShutdown
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}
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// runAdhocNamedTunnel create, route and run a named tunnel in one command
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func runAdhocNamedTunnel(sc *subcommandContext, name, credentialsOutputPath string) error {
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tunnel, ok, err := sc.tunnelActive(name)
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if err != nil || !ok {
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// pass empty string as secret to generate one
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tunnel, err = sc.create(name, credentialsOutputPath, "")
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if err != nil {
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return errors.Wrap(err, "failed to create tunnel")
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}
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} else {
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sc.log.Info().Str(LogFieldTunnelID, tunnel.ID.String()).Msg("Reusing existing tunnel with this name")
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}
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if r, ok := routeFromFlag(sc.c); ok {
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if res, err := sc.route(tunnel.ID, r); err != nil {
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sc.log.Err(err).Str("route", r.String()).Msg(routeFailMsg)
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} else {
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sc.log.Info().Msg(res.SuccessSummary())
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}
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}
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if err := sc.run(tunnel.ID); err != nil {
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return errors.Wrap(err, "error running tunnel")
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}
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return nil
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}
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// runClassicTunnel creates a "classic" non-named tunnel
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func runClassicTunnel(sc *subcommandContext) error {
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return StartServer(sc.c, buildInfo, nil, sc.log)
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}
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func routeFromFlag(c *cli.Context) (route cfapi.HostnameRoute, ok bool) {
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if hostname := c.String("hostname"); hostname != "" {
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if lbPool := c.String("lb-pool"); lbPool != "" {
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return cfapi.NewLBRoute(hostname, lbPool), true
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}
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return cfapi.NewDNSRoute(hostname, c.Bool(overwriteDNSFlagName)), true
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}
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return nil, false
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}
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func StartServer(
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c *cli.Context,
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info *cliutil.BuildInfo,
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namedTunnel *connection.NamedTunnelProperties,
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log *zerolog.Logger,
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) error {
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_ = raven.SetDSN(sentryDSN)
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var wg sync.WaitGroup
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listeners := gracenet.Net{}
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errC := make(chan error)
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// Only log for locally configured tunnels (Token is blank).
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if config.GetConfiguration().Source() == "" && c.String(TunnelTokenFlag) == "" {
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log.Info().Msg(config.ErrNoConfigFile.Error())
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}
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if c.IsSet("trace-output") {
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tmpTraceFile, err := ioutil.TempFile("", "trace")
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if err != nil {
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log.Err(err).Msg("Failed to create new temporary file to save trace output")
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}
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traceLog := log.With().Str(LogFieldTmpTraceFilename, tmpTraceFile.Name()).Logger()
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defer func() {
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if err := tmpTraceFile.Close(); err != nil {
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traceLog.Err(err).Msg("Failed to close temporary trace output file")
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}
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traceOutputFilepath := c.String("trace-output")
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if err := os.Rename(tmpTraceFile.Name(), traceOutputFilepath); err != nil {
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traceLog.
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Err(err).
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Str(LogFieldTraceOutputFilepath, traceOutputFilepath).
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Msg("Failed to rename temporary trace output file")
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} else {
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err := os.Remove(tmpTraceFile.Name())
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if err != nil {
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traceLog.Err(err).Msg("Failed to remove the temporary trace file")
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}
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}
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}()
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if err := trace.Start(tmpTraceFile); err != nil {
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traceLog.Err(err).Msg("Failed to start trace")
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return errors.Wrap(err, "Error starting tracing")
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}
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defer trace.Stop()
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}
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info.Log(log)
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logClientOptions(c, log)
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// this context drives the server, when it's cancelled tunnel and all other components (origins, dns, etc...) should stop
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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go waitForSignal(graceShutdownC, log)
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if c.IsSet("proxy-dns") {
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dnsReadySignal := make(chan struct{})
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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 <- runDNSProxyServer(c, dnsReadySignal, ctx.Done(), log)
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}()
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// Wait for proxy-dns to come up (if used)
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<-dnsReadySignal
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}
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connectedSignal := signal.New(make(chan struct{}))
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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"), log)
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}
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// update needs to be after DNS proxy is up to resolve equinox server address
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wg.Add(1)
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go func() {
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defer wg.Done()
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autoupdater := updater.NewAutoUpdater(
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c.Bool("no-autoupdate"), c.Duration("autoupdate-freq"), &listeners, log,
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)
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errC <- autoupdater.Run(ctx)
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}()
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// Serve DNS proxy stand-alone if no hostname or tag or app is going to run
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if dnsProxyStandAlone(c, namedTunnel) {
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connectedSignal.Notify()
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// no grace period, handle SIGINT/SIGTERM immediately
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return waitToShutdown(&wg, cancel, errC, graceShutdownC, 0, log)
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}
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url := c.String("url")
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hostname := c.String("hostname")
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if url == hostname && url != "" && hostname != "" {
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errText := "hostname and url shouldn't match. See --help for more information"
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log.Error().Msg(errText)
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return fmt.Errorf(errText)
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}
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logTransport := logger.CreateTransportLoggerFromContext(c, logger.EnableTerminalLog)
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observer := connection.NewObserver(log, logTransport)
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// Send Quick Tunnel URL to UI if applicable
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var quickTunnelURL string
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if namedTunnel != nil {
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quickTunnelURL = namedTunnel.QuickTunnelUrl
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}
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if quickTunnelURL != "" {
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observer.SendURL(quickTunnelURL)
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}
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tunnelConfig, orchestratorConfig, err := prepareTunnelConfig(c, info, log, logTransport, observer, namedTunnel)
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if err != nil {
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log.Err(err).Msg("Couldn't start tunnel")
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return err
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}
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var clientID uuid.UUID
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if tunnelConfig.NamedTunnel != nil {
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clientID, err = uuid.FromBytes(tunnelConfig.NamedTunnel.Client.ClientID)
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if err != nil {
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// set to nil for classic tunnels
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clientID = uuid.Nil
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}
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}
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orchestrator, err := orchestration.NewOrchestrator(ctx, orchestratorConfig, tunnelConfig.Tags, tunnelConfig.Log)
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if err != nil {
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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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log.Err(err).Msg("Error opening metrics server listener")
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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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readinessServer := metrics.NewReadyServer(log, clientID)
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observer.RegisterSink(readinessServer)
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metricsConfig := metrics.Config{
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ReadyServer: readinessServer,
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QuickTunnelHostname: quickTunnelURL,
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Orchestrator: orchestrator,
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}
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errC <- metrics.ServeMetrics(metricsListener, ctx, metricsConfig, log)
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}()
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reconnectCh := make(chan supervisor.ReconnectSignal, c.Int("ha-connections"))
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if c.IsSet("stdin-control") {
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log.Info().Msg("Enabling control through stdin")
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go stdinControl(reconnectCh, log)
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}
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wg.Add(1)
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go func() {
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defer func() {
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wg.Done()
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log.Info().Msg("Tunnel server stopped")
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}()
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errC <- supervisor.StartTunnelDaemon(ctx, tunnelConfig, orchestrator, connectedSignal, reconnectCh, graceShutdownC)
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}()
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gracePeriod, err := gracePeriod(c)
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if err != nil {
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return err
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}
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return waitToShutdown(&wg, cancel, errC, graceShutdownC, gracePeriod, log)
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}
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func waitToShutdown(wg *sync.WaitGroup,
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cancelServerContext func(),
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errC <-chan error,
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graceShutdownC <-chan struct{},
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gracePeriod time.Duration,
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log *zerolog.Logger,
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) error {
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var err error
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select {
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case err = <-errC:
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log.Error().Err(err).Msg("Initiating shutdown")
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case <-graceShutdownC:
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log.Debug().Msg("Graceful shutdown signalled")
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if gracePeriod > 0 {
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// wait for either grace period or service termination
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select {
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case <-time.Tick(gracePeriod):
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case <-errC:
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}
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}
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}
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// stop server context
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cancelServerContext()
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// Wait for clean exit, discarding all errors while we wait
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stopDiscarding := make(chan struct{})
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go func() {
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for {
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select {
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case <-errC: // ignore
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case <-stopDiscarding:
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return
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}
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}
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}()
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wg.Wait()
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close(stopDiscarding)
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return err
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}
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func notifySystemd(waitForSignal *signal.Signal) {
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<-waitForSignal.Wait()
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daemon.SdNotify(false, "READY=1")
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}
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func writePidFile(waitForSignal *signal.Signal, pidPathname string, log *zerolog.Logger) {
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<-waitForSignal.Wait()
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expandedPath, err := homedir.Expand(pidPathname)
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if err != nil {
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log.Err(err).Str(LogFieldPIDPathname, pidPathname).Msg("Unable to expand the path, try to use absolute path in --pidfile")
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return
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}
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file, err := os.Create(expandedPath)
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if err != nil {
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log.Err(err).Str(LogFieldExpandedPath, expandedPath).Msg("Unable to write pid")
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return
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}
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defer file.Close()
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fmt.Fprintf(file, "%d", os.Getpid())
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}
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func hostnameFromURI(uri string) string {
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u, err := url.Parse(uri)
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if err != nil {
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return ""
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}
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switch u.Scheme {
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case "ssh":
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return addPortIfMissing(u, 22)
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case "rdp":
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return addPortIfMissing(u, 3389)
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case "smb":
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return addPortIfMissing(u, 445)
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case "tcp":
|
|
return addPortIfMissing(u, 7864) // just a random port since there isn't a default in this case
|
|
}
|
|
return ""
|
|
}
|
|
|
|
func addPortIfMissing(uri *url.URL, port int) string {
|
|
if uri.Port() != "" {
|
|
return uri.Host
|
|
}
|
|
return fmt.Sprintf("%s:%d", uri.Hostname(), port)
|
|
}
|
|
|
|
func tunnelFlags(shouldHide bool) []cli.Flag {
|
|
flags := configureCloudflaredFlags(shouldHide)
|
|
flags = append(flags, configureProxyFlags(shouldHide)...)
|
|
flags = append(flags, configureLoggingFlags(shouldHide)...)
|
|
flags = append(flags, configureProxyDNSFlags(shouldHide)...)
|
|
flags = append(flags, []cli.Flag{
|
|
credentialsFileFlag,
|
|
altsrc.NewBoolFlag(&cli.BoolFlag{
|
|
Name: "is-autoupdated",
|
|
Usage: "Signal the new process that Cloudflare Tunnel connector has been autoupdated",
|
|
Value: false,
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewStringSliceFlag(&cli.StringSliceFlag{
|
|
Name: "edge",
|
|
Usage: "Address of the Cloudflare tunnel server. Only works in Cloudflare's internal testing environment.",
|
|
EnvVars: []string{"TUNNEL_EDGE"},
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: "region",
|
|
Usage: "Cloudflare Edge region to connect to. Omit or set to empty to connect to the global region.",
|
|
EnvVars: []string{"TUNNEL_REGION"},
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: "edge-ip-version",
|
|
Usage: "Cloudflare Edge ip address version to connect with. {4, 6, auto}",
|
|
EnvVars: []string{"TUNNEL_EDGE_IP_VERSION"},
|
|
Value: "4",
|
|
Hidden: false,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: tlsconfig.CaCertFlag,
|
|
Usage: "Certificate Authority authenticating connections with Cloudflare's edge network.",
|
|
EnvVars: []string{"TUNNEL_CACERT"},
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: "hostname",
|
|
Usage: "Set a hostname on a Cloudflare zone to route traffic through this tunnel.",
|
|
EnvVars: []string{"TUNNEL_HOSTNAME"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: "id",
|
|
Usage: "A unique identifier used to tie connections to this tunnel instance.",
|
|
EnvVars: []string{"TUNNEL_ID"},
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: "lb-pool",
|
|
Usage: "The name of a (new/existing) load balancing pool to add this origin to.",
|
|
EnvVars: []string{"TUNNEL_LB_POOL"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: "api-key",
|
|
Usage: "This parameter has been deprecated since version 2017.10.1.",
|
|
EnvVars: []string{"TUNNEL_API_KEY"},
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: "api-email",
|
|
Usage: "This parameter has been deprecated since version 2017.10.1.",
|
|
EnvVars: []string{"TUNNEL_API_EMAIL"},
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: "api-ca-key",
|
|
Usage: "This parameter has been deprecated since version 2017.10.1.",
|
|
EnvVars: []string{"TUNNEL_API_CA_KEY"},
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: "api-url",
|
|
Usage: "Base URL for Cloudflare API v4",
|
|
EnvVars: []string{"TUNNEL_API_URL"},
|
|
Value: "https://api.cloudflare.com/client/v4",
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewDurationFlag(&cli.DurationFlag{
|
|
Name: "metrics-update-freq",
|
|
Usage: "Frequency to update tunnel metrics",
|
|
Value: time.Second * 5,
|
|
EnvVars: []string{"TUNNEL_METRICS_UPDATE_FREQ"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewStringSliceFlag(&cli.StringSliceFlag{
|
|
Name: "tag",
|
|
Usage: "Custom tags used to identify this tunnel, in format `KEY=VALUE`. Multiple tags may be specified",
|
|
EnvVars: []string{"TUNNEL_TAG"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewDurationFlag(&cli.DurationFlag{
|
|
Name: "heartbeat-interval",
|
|
Usage: "Minimum idle time before sending a heartbeat.",
|
|
Value: time.Second * 5,
|
|
Hidden: true,
|
|
}),
|
|
// Note TUN-3758 , we use Int because UInt is not supported with altsrc
|
|
altsrc.NewIntFlag(&cli.IntFlag{
|
|
Name: "heartbeat-count",
|
|
Usage: "Minimum number of unacked heartbeats to send before closing the connection.",
|
|
Value: 5,
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewIntFlag(&cli.IntFlag{
|
|
Name: "max-edge-addr-retries",
|
|
Usage: "Maximum number of times to retry on edge addrs before falling back to a lower protocol",
|
|
Value: 8,
|
|
Hidden: true,
|
|
}),
|
|
// Note TUN-3758 , we use Int because UInt is not supported with altsrc
|
|
altsrc.NewIntFlag(&cli.IntFlag{
|
|
Name: "retries",
|
|
Value: 5,
|
|
Usage: "Maximum number of retries for connection/protocol errors.",
|
|
EnvVars: []string{"TUNNEL_RETRIES"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewIntFlag(&cli.IntFlag{
|
|
Name: "ha-connections",
|
|
Value: 4,
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewDurationFlag(&cli.DurationFlag{
|
|
Name: "grace-period",
|
|
Usage: "When cloudflared receives SIGINT/SIGTERM it will stop accepting new requests, wait for in-progress requests to terminate, then shutdown. Waiting for in-progress requests will timeout after this grace period, or when a second SIGTERM/SIGINT is received.",
|
|
Value: time.Second * 30,
|
|
EnvVars: []string{"TUNNEL_GRACE_PERIOD"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
// Note TUN-3758 , we use Int because UInt is not supported with altsrc
|
|
altsrc.NewIntFlag(&cli.IntFlag{
|
|
Name: "compression-quality",
|
|
Value: 0,
|
|
Usage: "(beta) Use cross-stream compression instead HTTP compression. 0-off, 1-low, 2-medium, >=3-high.",
|
|
EnvVars: []string{"TUNNEL_COMPRESSION_LEVEL"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewBoolFlag(&cli.BoolFlag{
|
|
Name: "use-reconnect-token",
|
|
Usage: "Test reestablishing connections with the new 'reconnect token' flow.",
|
|
Value: true,
|
|
EnvVars: []string{"TUNNEL_USE_RECONNECT_TOKEN"},
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewDurationFlag(&cli.DurationFlag{
|
|
Name: "dial-edge-timeout",
|
|
Usage: "Maximum wait time to set up a connection with the edge",
|
|
Value: time.Second * 15,
|
|
EnvVars: []string{"DIAL_EDGE_TIMEOUT"},
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewBoolFlag(&cli.BoolFlag{
|
|
Name: "stdin-control",
|
|
Usage: "Control the process using commands sent through stdin",
|
|
EnvVars: []string{"STDIN_CONTROL"},
|
|
Hidden: true,
|
|
Value: false,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: "name",
|
|
Aliases: []string{"n"},
|
|
EnvVars: []string{"TUNNEL_NAME"},
|
|
Usage: "Stable name to identify the tunnel. Using this flag will create, route and run a tunnel. For production usage, execute each command separately",
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewBoolFlag(&cli.BoolFlag{
|
|
Name: uiFlag,
|
|
Usage: "(depreciated) Launch tunnel UI. Tunnel logs are scrollable via 'j', 'k', or arrow keys.",
|
|
Value: false,
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: "quick-service",
|
|
Usage: "URL for a service which manages unauthenticated 'quick' tunnels.",
|
|
Value: "https://api.trycloudflare.com",
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewIntFlag(&cli.IntFlag{
|
|
Name: "max-fetch-size",
|
|
Usage: `The maximum number of results that cloudflared can fetch from Cloudflare API for any listing operations needed`,
|
|
EnvVars: []string{"TUNNEL_MAX_FETCH_SIZE"},
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewBoolFlag(&cli.BoolFlag{
|
|
Name: "post-quantum",
|
|
Usage: "When given creates an experimental post-quantum secure tunnel",
|
|
Aliases: []string{"pq"},
|
|
EnvVars: []string{"TUNNEL_POST_QUANTUM"},
|
|
Hidden: FipsEnabled,
|
|
}),
|
|
selectProtocolFlag,
|
|
overwriteDNSFlag,
|
|
}...)
|
|
|
|
return flags
|
|
}
|
|
|
|
// Flags in tunnel command that is relevant to run subcommand
|
|
func configureCloudflaredFlags(shouldHide bool) []cli.Flag {
|
|
return []cli.Flag{
|
|
&cli.StringFlag{
|
|
Name: "config",
|
|
Usage: "Specifies a config file in YAML format.",
|
|
Value: config.FindDefaultConfigPath(),
|
|
Hidden: shouldHide,
|
|
},
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: "origincert",
|
|
Usage: "Path to the certificate generated for your origin when you run cloudflared login.",
|
|
EnvVars: []string{"TUNNEL_ORIGIN_CERT"},
|
|
Value: findDefaultOriginCertPath(),
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewDurationFlag(&cli.DurationFlag{
|
|
Name: "autoupdate-freq",
|
|
Usage: fmt.Sprintf("Autoupdate frequency. Default is %v.", updater.DefaultCheckUpdateFreq),
|
|
Value: updater.DefaultCheckUpdateFreq,
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewBoolFlag(&cli.BoolFlag{
|
|
Name: "no-autoupdate",
|
|
Usage: "Disable periodic check for updates, restarting the server with the new version.",
|
|
EnvVars: []string{"NO_AUTOUPDATE"},
|
|
Value: false,
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: "metrics",
|
|
Value: "localhost:",
|
|
Usage: "Listen address for metrics reporting.",
|
|
EnvVars: []string{"TUNNEL_METRICS"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: "pidfile",
|
|
Usage: "Write the application's PID to this file after first successful connection.",
|
|
EnvVars: []string{"TUNNEL_PIDFILE"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
}
|
|
}
|
|
|
|
func configureProxyFlags(shouldHide bool) []cli.Flag {
|
|
flags := []cli.Flag{
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: "url",
|
|
Value: "http://localhost:8080",
|
|
Usage: "Connect to the local webserver at `URL`.",
|
|
EnvVars: []string{"TUNNEL_URL"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewBoolFlag(&cli.BoolFlag{
|
|
Name: "hello-world",
|
|
Value: false,
|
|
Usage: "Run Hello World Server",
|
|
EnvVars: []string{"TUNNEL_HELLO_WORLD"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewBoolFlag(&cli.BoolFlag{
|
|
Name: ingress.Socks5Flag,
|
|
Usage: legacyTunnelFlag("specify if this tunnel is running as a SOCK5 Server"),
|
|
EnvVars: []string{"TUNNEL_SOCKS"},
|
|
Value: false,
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewDurationFlag(&cli.DurationFlag{
|
|
Name: ingress.ProxyConnectTimeoutFlag,
|
|
Usage: legacyTunnelFlag("HTTP proxy timeout for establishing a new connection"),
|
|
Value: time.Second * 30,
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewDurationFlag(&cli.DurationFlag{
|
|
Name: ingress.ProxyTLSTimeoutFlag,
|
|
Usage: legacyTunnelFlag("HTTP proxy timeout for completing a TLS handshake"),
|
|
Value: time.Second * 10,
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewDurationFlag(&cli.DurationFlag{
|
|
Name: ingress.ProxyTCPKeepAliveFlag,
|
|
Usage: legacyTunnelFlag("HTTP proxy TCP keepalive duration"),
|
|
Value: time.Second * 30,
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewBoolFlag(&cli.BoolFlag{
|
|
Name: ingress.ProxyNoHappyEyeballsFlag,
|
|
Usage: legacyTunnelFlag("HTTP proxy should disable \"happy eyeballs\" for IPv4/v6 fallback"),
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewIntFlag(&cli.IntFlag{
|
|
Name: ingress.ProxyKeepAliveConnectionsFlag,
|
|
Usage: legacyTunnelFlag("HTTP proxy maximum keepalive connection pool size"),
|
|
Value: 100,
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewDurationFlag(&cli.DurationFlag{
|
|
Name: ingress.ProxyKeepAliveTimeoutFlag,
|
|
Usage: legacyTunnelFlag("HTTP proxy timeout for closing an idle connection"),
|
|
Value: time.Second * 90,
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewDurationFlag(&cli.DurationFlag{
|
|
Name: "proxy-connection-timeout",
|
|
Usage: "DEPRECATED. No longer has any effect.",
|
|
Value: time.Second * 90,
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewDurationFlag(&cli.DurationFlag{
|
|
Name: "proxy-expect-continue-timeout",
|
|
Usage: "DEPRECATED. No longer has any effect.",
|
|
Value: time.Second * 90,
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: ingress.HTTPHostHeaderFlag,
|
|
Usage: legacyTunnelFlag("Sets the HTTP Host header for the local webserver."),
|
|
EnvVars: []string{"TUNNEL_HTTP_HOST_HEADER"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: ingress.OriginServerNameFlag,
|
|
Usage: legacyTunnelFlag("Hostname on the origin server certificate."),
|
|
EnvVars: []string{"TUNNEL_ORIGIN_SERVER_NAME"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: "unix-socket",
|
|
Usage: "Path to unix socket to use instead of --url",
|
|
EnvVars: []string{"TUNNEL_UNIX_SOCKET"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: tlsconfig.OriginCAPoolFlag,
|
|
Usage: legacyTunnelFlag("Path to the CA for the certificate of your origin. This option should be used only if your certificate is not signed by Cloudflare."),
|
|
EnvVars: []string{"TUNNEL_ORIGIN_CA_POOL"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewBoolFlag(&cli.BoolFlag{
|
|
Name: ingress.NoTLSVerifyFlag,
|
|
Usage: legacyTunnelFlag("Disables TLS verification of the certificate presented by your origin. Will allow any certificate from the origin to be accepted. Note: The connection from your machine to Cloudflare's Edge is still encrypted."),
|
|
EnvVars: []string{"NO_TLS_VERIFY"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewBoolFlag(&cli.BoolFlag{
|
|
Name: ingress.NoChunkedEncodingFlag,
|
|
Usage: legacyTunnelFlag("Disables chunked transfer encoding; useful if you are running a WSGI server."),
|
|
EnvVars: []string{"TUNNEL_NO_CHUNKED_ENCODING"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewBoolFlag(&cli.BoolFlag{
|
|
Name: ingress.Http2OriginFlag,
|
|
Usage: "Enables HTTP/2 origin servers.",
|
|
EnvVars: []string{"TUNNEL_ORIGIN_ENABLE_HTTP2"},
|
|
Hidden: shouldHide,
|
|
Value: false,
|
|
}),
|
|
}
|
|
return append(flags, sshFlags(shouldHide)...)
|
|
}
|
|
|
|
func legacyTunnelFlag(msg string) string {
|
|
return fmt.Sprintf(
|
|
"%s This flag only takes effect if you define your origin with `--url` and if you do not use ingress rules."+
|
|
" The recommended way is to rely on ingress rules and define this property under `originRequest` as per"+
|
|
" https://developers.cloudflare.com/cloudflare-one/connections/connect-apps/configuration/configuration-file/ingress",
|
|
msg,
|
|
)
|
|
}
|
|
|
|
func sshFlags(shouldHide bool) []cli.Flag {
|
|
return []cli.Flag{
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: sshPortFlag,
|
|
Usage: "Localhost port that cloudflared SSH server will run on",
|
|
Value: "2222",
|
|
EnvVars: []string{"LOCAL_SSH_PORT"},
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewDurationFlag(&cli.DurationFlag{
|
|
Name: sshIdleTimeoutFlag,
|
|
Usage: "Connection timeout after no activity",
|
|
EnvVars: []string{"SSH_IDLE_TIMEOUT"},
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewDurationFlag(&cli.DurationFlag{
|
|
Name: sshMaxTimeoutFlag,
|
|
Usage: "Absolute connection timeout",
|
|
EnvVars: []string{"SSH_MAX_TIMEOUT"},
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: bucketNameFlag,
|
|
Usage: "Bucket name of where to upload SSH logs",
|
|
EnvVars: []string{"BUCKET_ID"},
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: regionNameFlag,
|
|
Usage: "Region name of where to upload SSH logs",
|
|
EnvVars: []string{"REGION_ID"},
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: secretIDFlag,
|
|
Usage: "Secret ID of where to upload SSH logs",
|
|
EnvVars: []string{"SECRET_ID"},
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: accessKeyIDFlag,
|
|
Usage: "Access Key ID of where to upload SSH logs",
|
|
EnvVars: []string{"ACCESS_CLIENT_ID"},
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: sessionTokenIDFlag,
|
|
Usage: "Session Token to use in the configuration of SSH logs uploading",
|
|
EnvVars: []string{"SESSION_TOKEN_ID"},
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: s3URLFlag,
|
|
Usage: "S3 url of where to upload SSH logs",
|
|
EnvVars: []string{"S3_URL"},
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewPathFlag(&cli.PathFlag{
|
|
Name: hostKeyPath,
|
|
Usage: "Absolute path of directory to save SSH host keys in",
|
|
EnvVars: []string{"HOST_KEY_PATH"},
|
|
Hidden: true,
|
|
}),
|
|
altsrc.NewBoolFlag(&cli.BoolFlag{
|
|
Name: ingress.SSHServerFlag,
|
|
Value: false,
|
|
Usage: "Run an SSH Server",
|
|
EnvVars: []string{"TUNNEL_SSH_SERVER"},
|
|
Hidden: true, // TODO: remove when feature is complete
|
|
}),
|
|
altsrc.NewBoolFlag(&cli.BoolFlag{
|
|
Name: config.BastionFlag,
|
|
Value: false,
|
|
Usage: "Runs as jump host",
|
|
EnvVars: []string{"TUNNEL_BASTION"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: ingress.ProxyAddressFlag,
|
|
Usage: "Listen address for the proxy.",
|
|
Value: "127.0.0.1",
|
|
EnvVars: []string{"TUNNEL_PROXY_ADDRESS"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
// Note TUN-3758 , we use Int because UInt is not supported with altsrc
|
|
altsrc.NewIntFlag(&cli.IntFlag{
|
|
Name: ingress.ProxyPortFlag,
|
|
Usage: "Listen port for the proxy.",
|
|
Value: 0,
|
|
EnvVars: []string{"TUNNEL_PROXY_PORT"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
}
|
|
}
|
|
|
|
func configureLoggingFlags(shouldHide bool) []cli.Flag {
|
|
return []cli.Flag{
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: logger.LogLevelFlag,
|
|
Value: "info",
|
|
Usage: "Application logging level {debug, info, warn, error, fatal}. " + debugLevelWarning,
|
|
EnvVars: []string{"TUNNEL_LOGLEVEL"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: logger.LogTransportLevelFlag,
|
|
Aliases: []string{"proto-loglevel"}, // This flag used to be called proto-loglevel
|
|
Value: "info",
|
|
Usage: "Transport logging level(previously called protocol logging level) {debug, info, warn, error, fatal}",
|
|
EnvVars: []string{"TUNNEL_PROTO_LOGLEVEL", "TUNNEL_TRANSPORT_LOGLEVEL"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: logger.LogFileFlag,
|
|
Usage: "Save application log to this file for reporting issues.",
|
|
EnvVars: []string{"TUNNEL_LOGFILE"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: logger.LogDirectoryFlag,
|
|
Usage: "Save application log to this directory for reporting issues.",
|
|
EnvVars: []string{"TUNNEL_LOGDIRECTORY"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: "trace-output",
|
|
Usage: "Name of trace output file, generated when cloudflared stops.",
|
|
EnvVars: []string{"TUNNEL_TRACE_OUTPUT"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
}
|
|
}
|
|
|
|
func configureProxyDNSFlags(shouldHide bool) []cli.Flag {
|
|
return []cli.Flag{
|
|
altsrc.NewBoolFlag(&cli.BoolFlag{
|
|
Name: "proxy-dns",
|
|
Usage: "Run a DNS over HTTPS proxy server.",
|
|
EnvVars: []string{"TUNNEL_DNS"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewIntFlag(&cli.IntFlag{
|
|
Name: "proxy-dns-port",
|
|
Value: 53,
|
|
Usage: "Listen on given port for the DNS over HTTPS proxy server.",
|
|
EnvVars: []string{"TUNNEL_DNS_PORT"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewStringFlag(&cli.StringFlag{
|
|
Name: "proxy-dns-address",
|
|
Usage: "Listen address for the DNS over HTTPS proxy server.",
|
|
Value: "localhost",
|
|
EnvVars: []string{"TUNNEL_DNS_ADDRESS"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewStringSliceFlag(&cli.StringSliceFlag{
|
|
Name: "proxy-dns-upstream",
|
|
Usage: "Upstream endpoint URL, you can specify multiple endpoints for redundancy.",
|
|
Value: cli.NewStringSlice("https://1.1.1.1/dns-query", "https://1.0.0.1/dns-query"),
|
|
EnvVars: []string{"TUNNEL_DNS_UPSTREAM"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
altsrc.NewIntFlag(&cli.IntFlag{
|
|
Name: "proxy-dns-max-upstream-conns",
|
|
Usage: "Maximum concurrent connections to upstream. Setting to 0 means unlimited.",
|
|
Value: tunneldns.MaxUpstreamConnsDefault,
|
|
Hidden: shouldHide,
|
|
EnvVars: []string{"TUNNEL_DNS_MAX_UPSTREAM_CONNS"},
|
|
}),
|
|
altsrc.NewStringSliceFlag(&cli.StringSliceFlag{
|
|
Name: "proxy-dns-bootstrap",
|
|
Usage: "bootstrap endpoint URL, you can specify multiple endpoints for redundancy.",
|
|
Value: cli.NewStringSlice(
|
|
"https://162.159.36.1/dns-query",
|
|
"https://162.159.46.1/dns-query",
|
|
"https://[2606:4700:4700::1111]/dns-query",
|
|
"https://[2606:4700:4700::1001]/dns-query",
|
|
),
|
|
EnvVars: []string{"TUNNEL_DNS_BOOTSTRAP"},
|
|
Hidden: shouldHide,
|
|
}),
|
|
}
|
|
}
|
|
|
|
func stdinControl(reconnectCh chan supervisor.ReconnectSignal, log *zerolog.Logger) {
|
|
for {
|
|
scanner := bufio.NewScanner(os.Stdin)
|
|
for scanner.Scan() {
|
|
command := scanner.Text()
|
|
parts := strings.SplitN(command, " ", 2)
|
|
|
|
switch parts[0] {
|
|
case "":
|
|
break
|
|
case "reconnect":
|
|
var reconnect supervisor.ReconnectSignal
|
|
if len(parts) > 1 {
|
|
var err error
|
|
if reconnect.Delay, err = time.ParseDuration(parts[1]); err != nil {
|
|
log.Error().Msg(err.Error())
|
|
continue
|
|
}
|
|
}
|
|
log.Info().Msgf("Sending %+v", reconnect)
|
|
reconnectCh <- reconnect
|
|
default:
|
|
log.Info().Str(LogFieldCommand, command).Msg("Unknown command")
|
|
fallthrough
|
|
case "help":
|
|
log.Info().Msg(`Supported command:
|
|
reconnect [delay]
|
|
- restarts one randomly chosen connection with optional delay before reconnect`)
|
|
}
|
|
}
|
|
}
|
|
}
|