Merge pull request #1866 from xiang90/raftnode_log

raft: refactor logging at node level

raft/node.go

@@ -233,13 +233,13 @@ func (n *node) run(r *raft) {
 		if lead != r.leader() {
 			if r.hasLeader() {
 				if lead == None {
-					log.Printf("raft: elected leader %x at term %d", r.leader(), r.Term)
+					log.Printf("raft.node: %x elected leader %x at term %d", r.id, r.leader(), r.Term)
 				} else {
-					log.Printf("raft: leader changed from %x to %x at term %d", lead, r.leader(), r.Term)
+					log.Printf("raft.node: %x changed leader from %x to %x at term %d", r.id, lead, r.leader(), r.Term)
 				}
 				propc = n.propc
 			} else {
-				log.Printf("raft: lost leader %x at term %d", lead, r.Term)
+				log.Printf("raft.node: %x lost leader %x at term %d", r.id, lead, r.Term)
 				propc = nil
 			}
 			lead = r.leader()