Commit Graph

9 Commits

Author SHA1 Message Date
David Jimenez d7c4a89106
Add max upstream connections dns-proxy option ()
* 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
Igor Postelnik 6cdd20e820 TUN-3792: Handle graceful shutdown correctly when running as a windows service. Only expose one shutdown channel globally, which now triggers the graceful shutdown sequence across all modes. Removed separate handling of zero-duration grace period, instead it's checked only when we need to wait for exit. 2021-01-27 07:21:34 -06:00
Areg Harutyunyan 870f5fa907 TUN-3470: Replace in-house logger calls with zerolog 2020-12-23 14:15:17 -06:00
cthuang a7562dff68 TUN-3233: List tunnels support filtering by deleted, name, existed at and id 2020-08-07 10:09:26 +01:00
Dalton 046be63253 AUTH-2596 added new logger package and replaced logrus 2020-05-27 17:07:19 -05:00
Austin Cherry f18209af7d ARES-899: Fixes DoH client as system resolver. Fixes 2020-04-14 12:37:59 -05:00
Areg Harutyunyan ca9902a8d1 TUN-1099: Bring back changes in 2018.10.1 2018-10-08 14:20:28 -05:00
Areg Harutyunyan faeba02e57 TUN-1093: Revert cloudflared to 2018.8.0 2018-10-06 14:30:51 -05:00
Austin Cherry 4f04f35bd1 AUTH-910, AUTH-1049, AUTH-1068, AUTH-1056: Generate and store Access tokens with E2EE option, curl/cmd wrapper 2018-09-28 16:05:15 -05:00
Renamed from cmd/cloudflared/server.go (Browse further)