cli/command/container: use per-stats OSType if present

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/command/container/stats.go

@@ -109,6 +109,8 @@ func RunStats(ctx context.Context, dockerCLI command.Cli, options *StatsOptions)
 	apiClient := dockerCLI.Client()
 
 	// Get the daemonOSType to handle platform-specific stats fields.
+	// This value is used as a fallback for docker < v29, which did not
+	// include the OSType field per stats.
 	daemonOSType = dockerCLI.ServerInfo().OSType
 
 	// waitFirst is a WaitGroup to wait first stat data's reach for each container

cli/command/container/stats_helpers.go

@@ -88,6 +88,12 @@ func collect(ctx context.Context, s *Stats, cli client.ContainerAPIClient, strea
 				continue
 			}
 
+			// Daemon versions before v29 did not return per-stats OSType;
+			// fall back to using the daemon's OSType.
+			if v.OSType == "" {
+				v.OSType = daemonOSType
+			}
+
 			if daemonOSType == "windows" {
 				netRx, netTx := calculateNetwork(v.Networks)
 				s.SetStatistics(StatsEntry{