HTTP(S) connections inside container are very slow

[mikedavies-dev]

Problem description

I'm using Docker for Mac v1.12.3, the problem I am having is that that HTTP and HTTPS connections are very slow. DNS and Ping seem fine but HTTP(S) takes for example 5 seconds on the docker image but 0.05 seconds on the host:

Host (MacOS Sierra):
time curl www.google.com
0.05 real 
0.00 user 
0.00 sys

Docker:
time curl www.google.com
real 0m5.615s
user 0m0.010s
sys	0m0.000s

Project version(s) affected

Docer for Mac 1.12.3

[mikedavies-dev]

The issue was related to DNS settings the container. Using the --dns with docker run to provide a known server resolves the issue.

[docker-robott]

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