Fixdocker/docker#27539
After io.Copy(to, from), we should call to.CloseWrite(), not to.CloseRead().
Without this fix, TestTCP4ProxyHalfClose (newly added in this commit) fails as
follows:
--- FAIL: TestTCP4ProxyHalfClose (0.00s)
network_proxy_test.go:135: EOF
Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
This simplifies how we build it in docker/docker as no vendoring needed,
and this does program not use any logrus features.
Signed-off-by: Justin Cormack <justin.cormack@docker.com>
Rather than re-execing docker as the proxy, create a new command docker-proxy
that is much smaller to save memory in the case where there are a lot of
procies being created. Also allows the proxy to be replaced, for example
in Docker for Mac we have a proxy that proxies to osx instead of locally.
This is the vendoring pull for https://github.com/docker/docker/pull/23312
Signed-off-by: Justin Cormack <justin.cormack@docker.com>
