Add support for reloading raft config (#29485)

command/server.go

@@ -1639,6 +1639,10 @@ func (c *ServerCommand) Run(args []string) int {
 				c.logger.Warn(cErr.String())
 			}
 
+			if err := core.ReloadRaftConfig(config.Storage.Config); err != nil {
+				c.logger.Warn("error reloading raft config", "error", err.Error())
+			}
+
 			// Note that seal reloading can also be triggered via Core.TriggerSealReload.
 			// See the call to Core.SetSealReloadFunc above.
 			if reloaded, err := c.reloadSealsOnSigHup(ctx, core, config); err != nil {

command/server/config.go

@@ -1338,6 +1338,9 @@ func (c *Config) Sanitized() map[string]interface{} {
 			sanitizedStorage["raft"] = map[string]interface{}{
 				"max_entry_size": c.Storage.Config["max_entry_size"],
 			}
+			for k, v := range c.Storage.Config {
+				sanitizedStorage["raft"].(map[string]interface{})[k] = v
+			}
 		}
 
 		result["storage"] = sanitizedStorage