Added documentation for init service discovery

command/init.go

@@ -290,6 +290,30 @@ Init Options:
 
   -recovery-pgp-keys		If provided, behaves like "pgp-keys" but for the
 				recovery key shares. This is not normally available.
+
+  -auto				If set, performs service discovery using the underlying
+				Consul storage backend. When one or more Vault servers
+				are running on Consul storage backend (none else),
+				setting this flag will create a Consul client and
+				discovrs the nodes using the service name under which
+				Vault nodes are registered with Consul. Service name
+				should be supplied using 'consul-service' flag. This
+				option works well when each Vault cluster is registered
+				under a unique service name. Ensure that environment
+				variables required to communicate with Consul, like
+				(CONSUL_HTTP_ADDR, CONSUL_HTTP_TOKEN, CONSUL_HTTP_SSL,
+				et al) are properly set. If, only one Vault node is
+				discovered, then an initialization attempt will be made.
+				If more than one Vault nodes are discovered, they will
+				be listed on the output, requiring another execution of
+				this command with updated VAULT_ADDR environment variable.
+
+  -consul-service		Service name under which the all nodes of Vault are
+				registered with Consul. When Vault is using Consul
+				as its storage backend, by default, it will auto register
+				itself with Consul under the default name of "vault".
+				This name can be modified in Vault's configuration file,
+				using the "service" option under Consul backend.
 `
 	return strings.TrimSpace(helpText)
 }