Add deploy mode env variable

Signed-off-by: cai.zhang <cai.zhang@zilliz.com>

cmd/proxy/node/proxy_node.go

@@ -16,6 +16,7 @@ import (
 )
 
 func main() {
+	os.Setenv("DEPLOY_MODE", "DISTRIBUTED")
 	ctx, cancel := context.WithCancel(context.Background())
 	msFactory := pulsarms.NewFactory()
 	proxynode.Params.Init()

cmd/singlenode/main.go

@@ -42,6 +42,7 @@ func main() {
 	var roles roles.MilvusRoles
 	initRoles(&roles)
 	os.Setenv("QUERY_NODE_ID", "1")
+	os.Setenv("DEPLOY_MODE", "SINGLE_NODE")
 
 	logCfg := initLogCfg()
 	logutil.SetupLogger(&logCfg)

internal/proxynode/impl.go

@@ -3,6 +3,7 @@ package proxynode
 import (
 	"context"
 	"errors"
+	"os"
 	"strconv"
 
 	"go.uber.org/zap"
@@ -1281,7 +1282,7 @@ func (node *ProxyNode) RegisterLink(ctx context.Context, req *milvuspb.RegisterL
 		Address: nil,
 		Status: &commonpb.Status{
 			ErrorCode: commonpb.ErrorCode_Success,
-			Reason:    "",
+			Reason:    os.Getenv("DEPLOY_MODE"),
 		},
 	}, nil
 }