fix(ipv6): support ipv6 address in grpc config

internal/pkg/agent/configuration/grpc.go

@@ -5,7 +5,7 @@
 package configuration
 
 import (
-	"fmt"
+	"net"
 	"os"
 	"strconv"
 
@@ -71,7 +71,7 @@ func OverrideDefaultContainerGRPCPort(cfg *GRPCConfig) {
 
 // String returns the composed listen address for the GRPC.
 func (cfg *GRPCConfig) String() string {
-	return fmt.Sprintf("%s:%d", cfg.Address, cfg.Port)
+	return net.JoinHostPort(cfg.Address, strconv.Itoa(int(cfg.Port)))
 }
 
 // IsLocal returns true if port value is less than 0

internal/pkg/agent/configuration/grpc_test.go

@@ -42,3 +42,40 @@ func TestOverrideDefaultGRPCPort(t *testing.T) {
 		})
 	}
 }
+
+func TestGRPCAddr(t *testing.T) {
+	testcases := []struct {
+		name     string
+		addr     string
+		port     uint16
+		expected string
+	}{{
+		name:     "ipv4",
+		addr:     "127.0.0.1",
+		expected: "127.0.0.1:0",
+	}, {
+		name:     "ipv4+port",
+		addr:     "127.0.0.1",
+		port:     1,
+		expected: "127.0.0.1:1",
+	}, {
+		name:     "ipv6",
+		addr:     "::1",
+		expected: "[::1]:0",
+	}, {
+		name:     "ipv6+port",
+		addr:     "::1",
+		port:     1,
+		expected: "[::1]:1",
+	}}
+
+	for _, tc := range testcases {
+		t.Run(tc.name, func(t *testing.T) {
+			cfg := GRPCConfig{
+				Address: tc.addr,
+				Port:    tc.port,
+			}
+			assert.Equal(t, tc.expected, cfg.String())
+		})
+	}
+}

pkg/component/runtime/manager.go

@@ -14,6 +14,7 @@ import (
 	"net"
 	"net/url"
 	"path"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -988,9 +989,9 @@ func (m *Manager) getListenAddr() string {
 	if m.isLocal {
 		return m.listenAddr
 	}
-	addr := strings.SplitN(m.listenAddr, ":", 2)
-	if len(addr) == 2 && addr[1] == "0" {
-		return fmt.Sprintf("%s:%d", addr[0], m.listenPort)
+	host, port, err := net.SplitHostPort(m.listenAddr)
+	if err == nil && port == "0" {
+		return net.JoinHostPort(host, strconv.Itoa(m.listenPort))
 	}
 	return m.listenAddr
 }