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David Jimenez d7c4a89106
Add max upstream connections dns-proxy option (#290) 
* Add max upstream connections dns-proxy option

Allows defining a limit to the number of connections that can be
established with the upstream DNS host.

If left unset, there may be situations where connections fail to
establish, which causes the Transport to create an influx of connections
causing upstream to throttle our requests and triggering a runaway
effect resulting in high CPU usage. See https://github.com/cloudflare/cloudflared/issues/91

* Code review with proposed changes

* Add max upstream connections flag to tunnel flags

* Reduce DNS proxy max upstream connections default value

Reduce the default value of maximum upstream connections on the DNS
proxy to guarantee it works on single-core and other low-end hardware.
Further testing could allow for a safe increase of this value.

* Update dns-proxy flag name

Also remove `MaxUpstreamConnsFlag` const as it's no longer referenced in more than one place and to make things more consistent with how the other flags are referenced.

Co-authored-by: Adam Chalmers <achalmers@cloudflare.com>
 		2021-02-12 21:32:29 +04:00
.mac_resources AUTH-2712 mac package build script and better config file handling when started as a service 2020-06-25 16:44:57 -05:00
.teamcity AUTH-3103 CI build fixes 2020-09-18 19:33:30 +00:00
buffer perf(cloudflared): reuse memory from buffer pool to get better throughput (#161) 2020-02-24 17:06:19 +00:00
carrier TUN-3471: Add structured log context to logs 2021-01-05 20:21:16 +00:00
certutil TUN-2943: Copy certutil from edge into cloudflared 2020-05-04 17:37:29 -05:00
cmd/cloudflared Add max upstream connections dns-proxy option (#290) 2021-02-12 21:32:29 +04:00
connection TUN-3635: Send event when unregistering tunnel for gracful shutdown so /ready endpoint reports down status befoe connections finish handling pending requests. 2021-02-08 15:38:42 +00:00
dbconnect TUN-3471: Add structured log context to logs 2021-01-05 20:21:16 +00:00
dbconnect_tests Add db-connect, a SQL over HTTPS server 2019-11-12 20:34:39 +00:00
edgediscovery TUN-3471: Add structured log context to logs 2021-01-05 20:21:16 +00:00
h2mux Fixed connection error handling by removing duplicated errors, standardizing on non-pointer error types 2021-01-22 10:58:06 -06:00
hello TUN-3890: Code coverage for cloudflared in CI 2021-02-09 13:16:00 -06:00
ingress TUN-3757: Fix legacy Uint flags that are incorrectly handled by ufarve library 2021-01-14 13:08:55 +00:00
logger TUN-3795: Use RFC-3339 style date format for logs, produce timestamp in UTC 2021-01-26 15:04:33 +00:00
metrics TUN-3635: Send event when unregistering tunnel for gracful shutdown so /ready endpoint reports down status befoe connections finish handling pending requests. 2021-02-08 15:38:42 +00:00
origin TUN-3902: Add jitter to backoffhandler 2021-02-11 14:36:13 +00:00
overwatch AUTH-2169 make access login page more generic 2020-06-08 11:20:30 -05:00
signal TUN-1562: Refactor connectedSignal to be safe to close multiple times 2019-03-05 15:51:35 -06:00
socks TUN-3890: Code coverage for cloudflared in CI 2021-02-09 13:16:00 -06:00
ssh_server_tests AUTH-2089: Revise ssh server to function as a proxy 2019-10-07 13:04:04 -05:00
sshgen AUTH-3221: Saves org token to disk and uses it to refresh the app token 2020-11-24 21:38:59 +00:00
teamnet TUN-3688: Subcommand for users to check which route an IP proxies through 2021-01-07 15:31:26 +00:00
tlsconfig TUN-3471: Add structured log context to logs 2021-01-05 20:21:16 +00:00
tunneldns Add max upstream connections dns-proxy option (#290) 2021-02-12 21:32:29 +04:00
tunnelrpc TUN-3470: Replace in-house logger calls with zerolog 2020-12-23 14:15:17 -06:00
tunnelstore TUN-3670: Update Teamnet API gateway prefixes 2021-01-11 13:40:44 -06:00
validation TUN-3470: Replace in-house logger calls with zerolog 2020-12-23 14:15:17 -06:00
vendor TUN-3195: Don't colorize console logs when stderr is not a terminal 2021-01-21 17:03:51 -06:00
watcher AUTH-2596 added new logger package and replaced logrus 2020-05-27 17:07:19 -05:00
websocket TUN-3471: Add structured log context to logs 2021-01-05 20:21:16 +00:00
.docker-images AUTH-2871: fix rpm builds 2020-07-08 14:39:28 +00:00
.dockerignore TUN-3806: Use a .dockerignore 2021-01-26 14:04:53 +00:00
.gitignore TUN-3890: Code coverage for cloudflared in CI 2021-02-09 13:16:00 -06:00
Dockerfile TUN-3830: Use Go 1.15.7 2021-01-28 22:37:23 -06:00
LICENSE TUN-595: Add License/Readme files to cloudflared 2018-05-03 02:17:07 -05:00
Makefile TUN-3890: Code coverage for cloudflared in CI 2021-02-09 13:16:00 -06:00
README.md Update the TryCloudflare link 2021-02-11 15:19:28 +00:00
RELEASE_NOTES Release 2021.2.2 2021-02-10 11:27:31 -06:00
cfsetup.yaml TUN-3902: Add jitter to backoffhandler 2021-02-11 14:36:13 +00:00
cloudflared_man_template AUTH-2644: Change install location and add man page 2020-07-06 19:27:25 +00:00
dev.Dockerfile TUN-3830: Use Go 1.15.7 2021-01-28 22:37:23 -06:00
github_message.py AUTH-3148 fixed cloudflared copy and match all the files in the checksum upload 2020-10-06 11:39:40 -05:00
github_release.py AUTH-3185 fixed indention error 2020-10-21 12:14:39 -05:00
go.mod TUN-3195: Don't colorize console logs when stderr is not a terminal 2021-01-21 17:03:51 -06:00
go.sum TUN-3195: Don't colorize console logs when stderr is not a terminal 2021-01-21 17:03:51 -06:00
jet.yaml TRAFFIC-448: build cloudflare for junos and publish to s3 2020-09-24 19:23:53 +04:00
postinst.sh AUTH-2858: Set file to disable autoupdate 2020-07-10 18:03:07 +00:00
postrm.sh AUTH-2858: Set file to disable autoupdate 2020-07-10 18:03:07 +00:00
wix.json AUTH-2712 mac package build script and better config file handling when started as a service 2020-06-25 16:44:57 -05:00

README.md

Argo Tunnel client

Contains the command-line client for Argo Tunnel, a tunneling daemon that proxies any local webserver through the Cloudflare network. Extensive documentation can be found in the Argo Tunnel section of the Cloudflare Docs.

Before you get started

Before you use Argo Tunnel, you'll need to complete a few steps in the Cloudflare dashboard. The website you add to Cloudflare will be used to route traffic to your Tunnel.

  1. Add a website to Cloudflare
  2. Change your domain nameservers to Cloudflare

Installing cloudflared

Downloads are available as standalone binaries, a Docker image, and Debian, RPM, and Homebrew packages. You can also find releases here on the cloudflared GitHub repository.

User documentation for Argo Tunnel can be found at https://developers.cloudflare.com/cloudflare-one/connections/connect-apps

Creating Tunnels and routing traffic

Once installed, you can authenticate cloudflared into your Cloudflare account and begin creating Tunnels that serve traffic for hostnames in your account.

TryCloudflare

Want to test Argo Tunnel before adding a website to Cloudflare? You can do so with TryCloudflare using the documentation available here.

Deprecated versions

Cloudflare currently supports all versions of cloudflared. Starting on March 20, 2021, Cloudflare will no longer support versions released prior to 2020.5.1.

All features available in versions released prior to 2020.5.1 are available in current versions. Breaking changes unrelated to feature availability may be introduced that will impact versions released prior to 2020.5.1. You can read more about upgrading cloudflared in our developer documentation.

Version(s) Deprecation status
2020.5.1 and later Supported
Versions prior to 2020.5.1 Will no longer be supported starting March 20, 2021