reverse_proxy: use the new KeepAliveConfig to set probe interval (#7157)

Co-authored-by: Matt Holt <mholt@users.noreply.github.com>

WeidiDeng committed Aug 22, 2025 at 04:36 UTC 1c596e3c5a1cd0b52febb1506ffe471918bd1128

1 file changed +12

modules/caddyhttp/reverseproxy/httptransport.go

+12

@@ -428,7 +428,19 @@ func (h *HTTPTransport) NewTransport(caddyCtx caddy.Context) (*http.Transport, e

428 }

429

430 if h.KeepAlive != nil {

431 + // according to https://pkg.go.dev/net#Dialer.KeepAliveConfig,

432 + // KeepAlive is ignored if KeepAliveConfig.Enable is true.

433 + // If configured to 0, a system-dependent default is used.

434 + // To disable tcp keepalive, choose a negative value,

435 + // so KeepAliveConfig.Enable is false and KeepAlive is negative.

436 +

437 + // This is different from http keepalive where a tcp connection

438 + // can transfer multiple http requests/responses.

439 dialer.KeepAlive = time.Duration(h.KeepAlive.ProbeInterval)

440 + dialer.KeepAliveConfig = net.KeepAliveConfig{

441 + Enable: h.KeepAlive.ProbeInterval > 0,

442 + Interval: time.Duration(h.KeepAlive.ProbeInterval),

443 + }

444 if h.KeepAlive.Enabled != nil {

445 rt.DisableKeepAlives = !*h.KeepAlive.Enabled

446 }