From 45be0b3ef093944ce1d1fe180179dff2a88fdaa3 Mon Sep 17 00:00:00 2001
From: Joseph Schorr <josephschorr@users.noreply.github.com>
Date: Fri, 10 Jan 2025 10:51:19 -0500
Subject: [PATCH] Change node ID to use a hash of the hostname

---
 pkg/middleware/nodeid/nodeid.go | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/pkg/middleware/nodeid/nodeid.go b/pkg/middleware/nodeid/nodeid.go
index 2c8cea66f9..cea4a51521 100644
--- a/pkg/middleware/nodeid/nodeid.go
+++ b/pkg/middleware/nodeid/nodeid.go
@@ -2,8 +2,10 @@ package nodeid
 
 import (
 	"context"
+	"fmt"
 	"os"
 
+	"github.com/cespare/xxhash/v2"
 	middleware "github.com/grpc-ecosystem/go-grpc-middleware/v2"
 	"google.golang.org/grpc"
 )
@@ -40,7 +42,14 @@ func FromContext(ctx context.Context) (string, error) {
 		if err != nil {
 			return "", err
 		}
-		defaultNodeID = spiceDBPrefix + hostname
+
+		// Hash the hostname to get the final default node ID.
+		hasher := xxhash.New()
+		if _, err := hasher.WriteString(hostname); err != nil {
+			return "", fmt.Errorf("failed to hash hostname: %w", err)
+		}
+
+		defaultNodeID = spiceDBPrefix + fmt.Sprintf("%x", hasher.Sum(nil))
 	}
 
 	if err := setInContext(ctx, defaultNodeID); err != nil {