add schema access option and update readme

README.md

@@ -14,6 +14,7 @@ Host/port are by default `localhost:8880`, you can change the configuration by u
 Usage of ./vmalertcli:
   -action="groups": VMAlert action to take {groups|alerts|metrics|reload}
   -host="localhost": Host where VMAlert responds
+  -schema="http": Schema to use when accessing VMAlert
   -port=8880: VMAlert port
   -pretty=false: Pretty print {false|true}
 ```
@@ -26,7 +27,7 @@ Put binary in $PATH (release will be updated).
 
 View alert groups:
 ```
-vmalertcli -action groups -pretty
+vmalertcli -schema http -action groups -pretty
 ```
 
 View VMAlert metrics:

main.go

@@ -13,6 +13,7 @@ import (
 
 var (
 	vmalertHost   = flag.String("host", "localhost", "Host where VMAlert responds")
+	vmalertSchema = flag.String("schema", "http", "Use http|https")
 	vmalertPort   = flag.Int("port", 8880, "VMAlert port")
 	vmalertAction = flag.String("action", "groups", "VMAlert action to take {groups|alerts|metrics|reload|status <groupName> <alertId>}")
 	prettyPrint   = flag.Bool("pretty", false, "Pretty print {false|true}")
@@ -39,7 +40,9 @@ func getJsonData(apiBase string, apiEndpoint string) []byte {
 func main() {
 	host := *vmalertHost
 	action := *vmalertAction
-	vmalertBase := "http://" + host + ":" + strconv.Itoa(*vmalertPort)
+	schema := *vmalertSchema
+
+	vmalertBase := schema + "://" + host + ":" + strconv.Itoa(*vmalertPort)
 
 	switch takeAction := action; takeAction {
 	case "groups":