d7c4a89106
* 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> |
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