Merge pull request #2736 from cfromknecht/config-num-workers

lncfg: add CLI worker configuration

config.go

@@ -252,6 +252,8 @@ type config struct {
 	net tor.Net
 
 	Routing *routing.Conf `group:"routing" namespace:"routing"`
+
+	Workers *lncfg.Workers `group:"workers" namespace:"workers"`
 }
 
 // loadConfig initializes and parses the config using a config file and command
@@ -334,6 +336,11 @@ func loadConfig() (*config, error) {
 			Control: defaultTorControl,
 		},
 		net: &tor.ClearNet{},
+		Workers: &lncfg.Workers{
+			Read:  lncfg.DefaultReadWorkers,
+			Write: lncfg.DefaultWriteWorkers,
+			Sig:   lncfg.DefaultSigWorkers,
+		},
 	}
 
 	// Pre-parse the command line options to pick up an alternative config
@@ -968,6 +975,12 @@ func loadConfig() (*config, error) {
 			"minbackoff")
 	}
 
+	// Assert that all worker pools will have a positive number of
+	// workers, otherwise the pools will rendered useless.
+	if err := cfg.Workers.Validate(); err != nil {
+		return nil, err
+	}
+
 	// Finally, ensure that the user's color is correctly formatted,
 	// otherwise the server will not be able to start after the unlocking
 	// the wallet.