What version of Go are you using (go version)?

$ go version

go version go1.14.4 linux/amd64

Does this issue reproduce with the latest release?

New feature

What operating system and processor architecture are you using (go env)?

$ go env
GO111MODULE=""

GOARCH="amd64"

GOBIN=""

GOCACHE="/home/vagrant/.cache/go-build"

GOENV="/home/vagrant/.config/go/env"

GOEXE=""

GOFLAGS=""

GOHOSTARCH="amd64"

GOHOSTOS="linux"

GOINSECURE=""

GONOPROXY="aetd-git.gsfc.nasa.gov"

GONOSUMDB="aetd-git.gsfc.nasa.gov"

GOOS="linux"

GOPATH="/home/vagrant/go"

GOPRIVATE="aetd-git.gsfc.nasa.gov"

GOPROXY="https://proxy.golang.org,direct"

GOROOT="/usr/local/go"

GOSUMDB="sum.golang.org"

GOTMPDIR=""

GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"

GCCGO="gccgo"

AR="ar"

CC="gcc"

CXX="g++"

CGO_ENABLED="1"

GOMOD=""

CGO_CFLAGS="-g -O2"

CGO_CPPFLAGS=""

CGO_CXXFLAGS="-g -O2"

CGO_FFLAGS="-g -O2"

CGO_LDFLAGS="-g -O2"

PKG_CONFIG="pkg-config"

GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build974215287=/tmp/go-build -gno-record-gcc-switches"

What did you do?

go build -v

What did you expect to see?

Modules downloaded properly

What did you see instead?

Modules downloaded properly

Feature request

We currently use go as for all of our code. We have go libraries as dependencies which use a private repository. I have setup the go env GOPRIVATE correctly.

The server hosting our private repository currently only allows ssh connections to git. I have successfully setup git to pull modules over ssh using git config --global url."git@<private_repo>:".insteadOf "https://<private_repo>/"

However our IT policy stats that we can only have 10 simultaneous ssh connections to our git repository.

This policy is implemented using the 10:30:x where after 10 simultaneous connections the drop rate is 30%.

If any code has more than 10 libraries then our CI/CD pipeline fails because of that rule and because go build -v pulls dependencies simultaneously.

The feature I'm requesting is to somehow limit the number of simultaneously connections to a host when downloading modules.

What comes to mind is a command line option in go mod download to limit simultaneous connections or maybe an env variable.

Thanks for your consideration.