functional: use strings for LogOutput

Signed-off-by: Gyuho Lee <gyuhox@gmail.com>

functional.yaml

@@ -34,7 +34,7 @@ agent-configs:
     pre-vote: true
     initial-corrupt-check: true
     logger: zap
-    log-output: /tmp/etcd-functional-1/etcd.log
+    log-output: [/tmp/etcd-functional-1/etcd.log]
     debug: true
   client-cert-data: ""
   client-cert-path: ""
@@ -85,7 +85,7 @@ agent-configs:
     pre-vote: true
     initial-corrupt-check: true
     logger: zap
-    log-output: /tmp/etcd-functional-2/etcd.log
+    log-output: [/tmp/etcd-functional-2/etcd.log]
     debug: true
   client-cert-data: ""
   client-cert-path: ""
@@ -136,7 +136,7 @@ agent-configs:
     pre-vote: true
     initial-corrupt-check: true
     logger: zap
-    log-output: /tmp/etcd-functional-3/etcd.log
+    log-output: [/tmp/etcd-functional-3/etcd.log]
     debug: true
   client-cert-data: ""
   client-cert-path: ""

functional/agent/handler.go

@@ -85,13 +85,14 @@ func (srv *Server) handleTesterRequest(req *rpcpb.Request) (resp *rpcpb.Response
 	}
 }
 
+// just archive the first file
 func (srv *Server) createEtcdLogFile() error {
 	var err error
-	srv.etcdLogFile, err = os.Create(srv.Member.Etcd.LogOutput)
+	srv.etcdLogFile, err = os.Create(srv.Member.Etcd.LogOutput[0])
 	if err != nil {
 		return err
 	}
-	srv.lg.Info("created etcd log file", zap.String("path", srv.Member.Etcd.LogOutput))
+	srv.lg.Info("created etcd log file", zap.String("path", srv.Member.Etcd.LogOutput[0]))
 	return nil
 }
 
@@ -664,7 +665,7 @@ func (srv *Server) handle_SIGQUIT_ETCD_AND_ARCHIVE_DATA() (*rpcpb.Response, erro
 	// TODO: support separate WAL directory
 	if err = archive(
 		srv.Member.BaseDir,
-		srv.Member.Etcd.LogOutput,
+		srv.Member.Etcd.LogOutput[0],
 		srv.Member.Etcd.DataDir,
 	); err != nil {
 		return nil, err

functional/rpcpb/etcd_config_test.go

@@ -58,7 +58,7 @@ func TestEtcd(t *testing.T) {
 		InitialCorruptCheck: true,
 
 		Logger:    "zap",
-		LogOutput: "/tmp/etcd-functional-1/etcd.log",
+		LogOutput: []string{"/tmp/etcd-functional-1/etcd.log"},
 		Debug:     true,
 	}
 
@@ -133,7 +133,7 @@ func TestEtcd(t *testing.T) {
 	expc.PreVote = true
 	expc.ExperimentalInitialCorruptCheck = true
 	expc.Logger = "zap"
-	expc.LogOutput = "/tmp/etcd-functional-1/etcd.log"
+	expc.LogOutput = []string{"/tmp/etcd-functional-1/etcd.log"}
 	expc.Debug = true
 	cfg, err := e.EmbedConfig()
 	if err != nil {

functional/rpcpb/rpc.proto

@@ -204,7 +204,7 @@ message Etcd {
 
   string Logger = 71 [(gogoproto.moretags) = "yaml:\"logger\""];
   // LogOutput is the log file to store current etcd server logs.
-  string LogOutput = 72 [(gogoproto.moretags) = "yaml:\"log-output\""];
+  repeated string LogOutput = 72 [(gogoproto.moretags) = "yaml:\"log-output\""];
   bool Debug = 73 [(gogoproto.moretags) = "yaml:\"debug\""];
 }
 

functional/tester/cluster_read_config.go

@@ -311,11 +311,17 @@ func read(lg *zap.Logger, fpath string) (*Cluster, error) {
 				clus.Members[i].ClientCertData = string(data)
 			}
 
-			if mem.Etcd.LogOutput == "" {
+			if len(mem.Etcd.LogOutput) == 0 {
 				return nil, fmt.Errorf("mem.Etcd.LogOutput cannot be empty")
 			}
-			if !strings.HasPrefix(mem.Etcd.LogOutput, mem.BaseDir) {
-				return nil, fmt.Errorf("LogOutput %q must be prefixed with BaseDir %q", mem.Etcd.LogOutput, mem.BaseDir)
+			for _, v := range mem.Etcd.LogOutput {
+				switch v {
+				case "stderr", "stdout", "/dev/null", "default":
+				default:
+					if !strings.HasPrefix(v, mem.BaseDir) {
+						return nil, fmt.Errorf("LogOutput %q must be prefixed with BaseDir %q", v, mem.BaseDir)
+					}
+				}
 			}
 		}
 	}

functional/tester/cluster_test.go

@@ -63,7 +63,7 @@ func Test_read(t *testing.T) {
 					PreVote:             true,
 					InitialCorruptCheck: true,
 					Logger:              "zap",
-					LogOutput:           "/tmp/etcd-functional-1/etcd.log",
+					LogOutput:           []string{"/tmp/etcd-functional-1/etcd.log"},
 					Debug:               true,
 				},
 				ClientCertData:      "",
@@ -116,7 +116,7 @@ func Test_read(t *testing.T) {
 					PreVote:             true,
 					InitialCorruptCheck: true,
 					Logger:              "zap",
-					LogOutput:           "/tmp/etcd-functional-2/etcd.log",
+					LogOutput:           []string{"/tmp/etcd-functional-2/etcd.log"},
 					Debug:               true,
 				},
 				ClientCertData:      "",
@@ -169,7 +169,7 @@ func Test_read(t *testing.T) {
 					PreVote:             true,
 					InitialCorruptCheck: true,
 					Logger:              "zap",
-					LogOutput:           "/tmp/etcd-functional-3/etcd.log",
+					LogOutput:           []string{"/tmp/etcd-functional-3/etcd.log"},
 					Debug:               true,
 				},
 				ClientCertData:      "",