The monitor component should be in charge of deciding how it is
best to send metrics to other peers and what that means.
This adds the PublishMetric() method to the component interface
and moves that functionality from Cluster main component to the
basic monitor.
There is a behaviour change. Before, the metrics where sent only to
the leader, while the leader was the only peer to broadcast them everywhere.
Now, all peers broadcast all metrics everywhere. This is mostly
because we should not rely on the consensus layer providing a Leader(), so
we are taking the chance to remove this dependency.
Note that in any-case, pubsub monitoring should replace the
existing basic monitor. This is just paving the ground.
Additionally, in order to not duplicate the multiRPC code
in the monitor, I have moved that functionality to go-libp2p-gorpc
and added an rpcutil library to cluster which includes useful
methods to perform multiRPC requests (some of them existed in
util.go, others are new and help handling multiple contexts etc).
License: MIT
Signed-off-by: Hector Sanjuan <code@hector.link>
Added go tests
Refactored cluster connect graph to new file
Refactored dot file printing to new repo
Fixed code climate issues
Added sharness test
License: MIT
Signed-off-by: Wyatt Daviau <wdaviau@cs.stanford.edu>
