[v12] Tag output from teleport configure as ERROR or WARNING if appli…

…es (#24676)

* Tag output from `teleport configure` as ERROR or WARNING if applies

* use utils.Color to set warnings and error colors

tool/teleport/common/teleport.go

@@ -957,32 +957,32 @@ func onConfigDump(flags dumpFlags) error {
 	entries, err := os.ReadDir(flags.DataDir)
 	if err != nil && !os.IsNotExist(err) {
 		fmt.Fprintf(
-			os.Stderr, "Could not check the contents of %s: %s\nThe data directory may contain existing cluster state.\n", flags.DataDir, err.Error())
+			os.Stderr, "%s Could not check the contents of %s: %s\n         The data directory may contain existing cluster state.\n", utils.Color(utils.Yellow, "WARNING:"), flags.DataDir, err.Error())
 	}
 
 	if err == nil && len(entries) != 0 {
 		fmt.Fprintf(
 			os.Stderr,
-			"The data directory %s is not empty and may contain existing cluster state. Running this configuration is likely a mistake. To join a new cluster, specify an alternate --data-dir or clear the %s directory.\n",
-			flags.DataDir, flags.DataDir)
+			"%s The data directory %s is not empty and may contain existing cluster state. Running this configuration is likely a mistake. To join a new cluster, specify an alternate --data-dir or clear the %s directory.\n",
+			utils.Color(utils.Yellow, "WARNING:"), flags.DataDir, flags.DataDir)
 	}
 
 	if strings.Contains(flags.Roles, defaults.RoleDatabase) {
-		fmt.Fprintln(os.Stderr, "Role db requires further configuration, db_service will be disabled")
+		fmt.Fprintf(os.Stderr, "%s Role db requires further configuration, db_service will be disabled. Use 'teleport db configure' command to create Teleport database service configurations.\n", utils.Color(utils.Red, "ERROR:"))
 	}
 
 	if strings.Contains(flags.Roles, defaults.RoleWindowsDesktop) {
-		fmt.Fprintln(os.Stderr, "Role windowsdesktop requires further configuration, windows_desktop_service will be disabled")
+		fmt.Fprintf(os.Stderr, "%s Role windowsdesktop requires further configuration, windows_desktop_service will be disabled. See https://goteleport.com/docs/desktop-access/ for configuration information.\n", utils.Color(utils.Red, "ERROR:"))
 	}
 
 	if configPath != "" {
 		canWriteToDataDir, err := utils.CanUserWriteTo(flags.DataDir)
 		if err != nil && !trace.IsNotImplemented(err) {
-			fmt.Fprintf(os.Stderr, "Failed to check data dir permissions: %+v", err)
+			fmt.Fprintf(os.Stderr, "%s Failed to check data dir permissions: %+v\n", utils.Color(utils.Yellow, "WARNING:"), err)
 		}
 		canWriteToConfDir, err := utils.CanUserWriteTo(filepath.Dir(configPath))
 		if err != nil {
-			fmt.Fprintf(os.Stderr, "Failed to check config dir permissions: %+v", err)
+			fmt.Fprintf(os.Stderr, "%s Failed to check config dir permissions: %+v\n", utils.Color(utils.Yellow, "WARNING:"), err)
 		}
 		requiresRoot := !canWriteToDataDir || !canWriteToConfDir