Add missing exist checks and doc line

nomad/operator_endpoint.go

@@ -54,15 +54,17 @@ func (op *Operator) RaftGetConfiguration(args *structs.GenericRequest, reply *st
 		raftProtocolVersion := "unknown"
 		if member, ok := serverMap[server.Address]; ok {
 			node = member.Name
-			raftProtocolVersion = member.Tags["raft_vsn"]
+			if raftVsn, ok := member.Tags["raft_vsn"]; ok {
+				raftProtocolVersion = raftVsn
+			}
 		}
 
 		entry := &structs.RaftServer{
-			ID:      server.ID,
-			Node:    node,
-			Address: server.Address,
-			Leader:  server.Address == leader,
-			Voter:   server.Suffrage == raft.Voter,
+			ID:           server.ID,
+			Node:         node,
+			Address:      server.Address,
+			Leader:       server.Address == leader,
+			Voter:        server.Suffrage == raft.Voter,
 			RaftProtocol: raftProtocolVersion,
 		}
 		reply.Servers = append(reply.Servers, entry)

nomad/util.go

@@ -62,7 +62,10 @@ func isNomadServer(m serf.Member) (bool, *serverParts) {
 		return false, nil
 	}
 
-	id := m.Tags["id"]
+	id := "unknown"
+	if v, ok := m.Tags["id"]; ok {
+		id = v
+	}
 	region := m.Tags["region"]
 	datacenter := m.Tags["dc"]
 	_, bootstrap := m.Tags["bootstrap"]

website/source/api/operator.html.md

@@ -59,6 +59,7 @@ $ curl \
       "ID": "127.0.0.1:4647",
       "Leader": true,
       "Node": "bacon-mac.global",
+      "RaftProtocol": 2,
       "Voter": true
     }
   ]