Fix master leader election when grpc ports change (#8272)

* Fix master leader detection when grpc ports change

* Canonicalize self peer entry to avoid raft self-alias panic

* Normalize and deduplicate master peer addresses

weed/command/master.go

@@ -4,9 +4,11 @@ import (
 	"context"
 	"crypto/tls"
 	"fmt"
+	"net"
 	"net/http"
 	"os"
 	"path"
+	"strconv"
 	"strings"
 	"time"
 
@@ -338,8 +340,16 @@ func checkPeers(masterIp string, masterPort int, masterGrpcPort int, peers strin
 	}
 
 	peers = strings.TrimSpace(peers)
-
-	cleanedPeers = pb.ServerAddresses(peers).ToAddresses()
+	seenPeers := make(map[string]struct{})
+	for _, peer := range pb.ServerAddresses(peers).ToAddresses() {
+		normalizedPeer := normalizeMasterPeerAddress(peer, masterAddress)
+		key := string(normalizedPeer)
+		if _, found := seenPeers[key]; found {
+			continue
+		}
+		seenPeers[key] = struct{}{}
+		cleanedPeers = append(cleanedPeers, normalizedPeer)
+	}
 
 	hasSelf := false
 	for _, peer := range cleanedPeers {
@@ -358,14 +368,31 @@ func checkPeers(masterIp string, masterPort int, masterGrpcPort int, peers strin
 	return
 }
 
+func normalizeMasterPeerAddress(peer pb.ServerAddress, self pb.ServerAddress) pb.ServerAddress {
+	if peer.ToHttpAddress() == self.ToHttpAddress() {
+		return self
+	}
+
+	_, grpcPort, err := net.SplitHostPort(peer.ToGrpcAddress())
+	if err != nil {
+		return peer
+	}
+	grpcPortValue, err := strconv.Atoi(grpcPort)
+	if err != nil {
+		return peer
+	}
+
+	return pb.NewServerAddressWithGrpcPort(peer.ToHttpAddress(), grpcPortValue)
+}
+
 func isTheFirstOne(self pb.ServerAddress, peers []pb.ServerAddress) bool {
 	slices.SortFunc(peers, func(a, b pb.ServerAddress) int {
-		return strings.Compare(string(a), string(b))
+		return strings.Compare(a.ToHttpAddress(), b.ToHttpAddress())
 	})
 	if len(peers) <= 0 {
 		return true
 	}
-	return self == peers[0]
+	return self.ToHttpAddress() == peers[0].ToHttpAddress()
 }
 
 func (m *MasterOptions) toMasterOption(whiteList []string) *weed_server.MasterOption {