The quorum package contains logic to reason about committed indexes as
well as vote outcomes for both majority and joint quorums. The package
is oblivious to the existence of learner replicas.
The plan is to hook this up to etcd/raft in subsequent commits.
To remove the dependency on ghodss/yaml. Replaced this dependency with sigs.k8s.io/yaml.
This wil help to remove the ghodss/yaml dependency from main kubernetes repository.
xref: https://github.com/kubernetes/kubernetes/issues/77024
etcd currently generates a few UUID style identifiers using approaches like `fmt.Sprintf("client-%s", strconv.FormatInt(time.Now().UnixNano(), 36))`.
But these can collide on machine architectures with larger timestamp steps (see https://github.com/etcd-io/etcd/issues/10035).
Gyuho Lee