Resources are not requested as a role

[philwinder]

Resources should be requested as a role, else they are requested as *.

The role should be set for each resource requested. E.g. should be setRole in here:
https://github.com/mesos/elasticsearch/blob/master/scheduler/src/main/java/org/apache/mesos/elasticsearch/scheduler/Resources.java#L21

See Kafka for an example:
mesos/kafka@64b5a1d#diff-80847d72b150ee9db41881483cd67fc4R475

[jhftrifork]

Update: tests for this currently fail because registration is denied to any scheduler registering with a role other than *:

I0909 09:33:15.562909    30 sched.cpp:264] No credentials provided. Attempting to register without authentication
I0909 09:33:15.564353    30 sched.cpp:815] Got error 'Role 'someframeworkrole' is invalid'

This is because mini-mesos does not have ACLs enabled.

The ACL/role feature in Mesos is enabled by passing a JSON configuration in a --acls command-line parameter when starting a Mesos master.

These flags are configured in the mesos-local Docker project.

The JSON configuration can either be a plain string or a file reference, but either way, the ACL is configured at the time the Mesos master is launched. So in the mini-mesos API, the ACL config needs to be passed to the new MesosCluster in the MesosClusterConfig argument.

mini-mesos can then pass the ACL as a JSON-formatted environment variable to Docker. These environment variables are then available in run.sh and are passed to the supervisord call, so the environment variables will also be available in supervisor.conf here, so we can substitute it as the --acls command-line argument there.

[philwinder]

Fixed in:#281
And: #296