Copy the updated version of freeport (sdk/freeport), and tweak it for use
in Nomad tests. This means staying below port 10000 to avoid conflicts with
the lib/freeport that is still transitively used by the old version of
consul that we vendor. Also provide implementations to find ephemeral ports
of macOS and Windows environments.
Ports acquired through freeport are supposed to be returned to freeport,
which this change now also introduces. Many tests are modified to include
calls to a cleanup function for Server objects.
This should help quite a bit with some flakey tests, but not all of them.
Our port problems will not go away completely until we upgrade our vendor
version of consul. With Go modules, we'll probably do a 'replace' to swap
out other copies of freeport with the one now in 'nomad/helper/freeport'.
Adds a Consul field to the TestServerConfig that allows passing in non-default values for e.g. consul address.
This will allow the TestServer to integrate with Consul's testutil/TestServer.
This drops the testings stdlib pkg from our dependencies. Saves a
whopping 46kb on our binary (was really hoping for more of a win there),
but also avoids potential ugliness with how testing sets flags.
This flag is not normally supported in Nomad, but we really need
to use it for testing to lower the timing values for registration
retries et. al. Instead of just enabling it on all tests, we
provide a bool flag in the config, which just makes the test
server pass the extra CLI arg when true.
