allow port to be configured by argument

Author: tgvashworth

multiple-servers/IMPLEMENTATION.md

@@ -51,6 +51,10 @@ Copied over from server-database, with file split up:
 
 This has the same setup steps as server-database, so those can be copied over.
 
+# Ports
+
+`cmd` files should allow ports to be configred using `--port`.
+
 ## Nginx
 
 Switch static server over to 8082.

multiple-servers/api/api.go

@@ -68,5 +68,6 @@ func Run(config Config) error {
 		w.Write(response)
 	})
 
+	log.Printf("port: %d\n", config.Port)
 	return http.ListenAndServe(fmt.Sprintf(":%d", config.Port), nil)
 }

multiple-servers/cmd/api-server/main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"flag"
 	"log"
 	"os"
 	"servers/api"
@@ -12,8 +13,11 @@ func main() {
 		log.Fatalln("DATABASE_URL not set")
 	}
 
+	port := flag.Int("port", 8081, "port the server will listen on")
+	flag.Parse()
+
 	log.Fatal(api.Run(api.Config{
 		DatabaseURL: os.Getenv("DATABASE_URL"),
-		Port:        8081,
+		Port:        *port,
 	}))
 }

multiple-servers/cmd/static-server/main.go

@@ -9,6 +9,7 @@ import (
 
 func main() {
 	path := flag.String("path", ".", "path to static files")
+	port := flag.Int("port", 8082, "port the server will listen on")
 	flag.Parse()
 
 	absPath, err := filepath.Abs(*path)
@@ -18,6 +19,6 @@ func main() {
 
 	log.Fatal(static.Run(static.Config{
 		Dir:  absPath,
-		Port: 8082,
+		Port: *port,
 	}))
 }

multiple-servers/static/static.go

@@ -23,5 +23,6 @@ func Run(config Config) error {
 		http.ServeFile(w, r, path)
 	})
 
+	log.Printf("port: %d\n", config.Port)
 	return http.ListenAndServe(fmt.Sprintf(":%d", config.Port), nil)
 }