This is quite hilarious...
$BASE_IMAGE is not defined in config.sh. So running this test would
actually attempt to run something like
docker -H=... run -e WEAVE_CIDR=10.2.1.4/24 grep ^1$ /sys/class/net/ethwe/carrier
i.e. it would try to run the 'grep' image.
So why does this not fail all the time?
1) 610_*.sh defines $BASE_IMAGE.
2) 620_*.sh builds a 'grep' image.
If either of these tests are included in the same test run before
650_*.sh, then the latter will succeed.
Throw in our fabulous CircleCI scheduler, which distributes tests
according to their execution time, and you end up with sporadic
failures.
Fixes#938.
It's ugly, but beats arg-parsing, inspecting the container and piecing
the address together from exposed ports.
We could just use the host from DOCKER_HOST, but that will fail in the
case of a host with multiple IPs, where the proxy only listens on one.
Matthias Radestock