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ConfigureHosts: remove deprecated DualStack option

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The `DualStack` option was deprecated in Go 1.12, and is now enabled by default
(through commit github.com/golang/go@efc185029bf770894defe63cec2c72a4c84b2ee9).

> The Dialer.DualStack field is now meaningless and documented as deprecated.
>
> To disable fallback, set FallbackDelay to a negative value.

The default `FallbackDelay` is 300ms; to make this more explicit, this patch
sets `FallbackDelay` to the default value.

Note that Docker Hub currently does not support IPv6 (DNS for registry-1.docker.io
has no AAAA records, so we should not hit the 300ms delay).

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn 2020-05-10 12:31:58 +02:00
parent 83084c9328
commit 1b9640496e
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1 changed files with 3 additions and 3 deletions
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2
remotes/docker/config/hosts.go
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@ -110,7 +110,7 @@ func ConfigureHosts(ctx context.Context, options HostOptions) docker.RegistryHos
DialContext: (&net.Dialer{
Timeout: 30 * time.Second,
KeepAlive: 30 * time.Second,
DualStack: true,
FallbackDelay: 300 * time.Millisecond,
}).DialContext,
MaxIdleConns: 10,
IdleConnTimeout: 30 * time.Second,