gscloud-server-create: auto generate password

Auto-generate a sufficiently secure password (using
https://pkg.go.dev/github.com/sethvargo/go-password) when --password is
not given on the command line.

--password flag will be removed in future release.

Fixes #90

cmd/server.go

@@ -10,6 +10,7 @@ import (
 
 	"github.com/gridscale/gsclient-go/v3"
 	"github.com/gridscale/gscloud/render"
+	"github.com/sethvargo/go-password/password"
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 )
@@ -185,17 +186,25 @@ To create a server without any storage just omit --with-template flag:
 		fmt.Println("Server created:", cServer.ObjectUUID)
 
 		if serverFlags.template != "" {
+			var password string
+
 			templateOp := rt.TemplateOperator()
 			template, _ := templateOp.GetTemplateByName(ctx, serverFlags.template)
 
+			if serverFlags.plainPassword == "" {
+				password = generatePassword()
+			} else {
+				password = serverFlags.plainPassword
+			}
+
 			storageOp := rt.StorageOperator()
 			cStorage, err := storageOp.CreateStorage(ctx, gsclient.StorageCreateRequest{
 				Name:        string(serverFlags.serverName),
 				Capacity:    serverFlags.storageSize,
 				StorageType: gsclient.DefaultStorageType,
 				Template: &gsclient.StorageTemplate{
 					TemplateUUID: template.Properties.ObjectUUID,
-					Password:     serverFlags.plainPassword,
+					Password:     password,
 					PasswordType: gsclient.PlainPasswordType,
 					Hostname:     serverFlags.hostName,
 				},
@@ -213,6 +222,7 @@ To create a server without any storage just omit --with-template flag:
 				log.Fatalf("Create storage failed: %s", err)
 			}
 			fmt.Println("Storage created:", cStorage.ObjectUUID)
+			fmt.Println("Password:", password)
 		}
 	},
 }
@@ -355,6 +365,14 @@ func init() {
 	rootCmd.AddCommand(serverCmd)
 }
 
+func generatePassword() string {
+	res, err := password.Generate(12, 10, 10, false, false)
+	if err != nil {
+		log.Fatalf("Failed generating password: %s\n", err)
+	}
+	return res
+}
+
 func toHardwareProfile(val string) gsclient.ServerHardwareProfile {
 	var prof gsclient.ServerHardwareProfile
 	switch val {

go.mod

@@ -9,6 +9,7 @@ require (
 	github.com/kardianos/osext v0.0.0-20190222173326-2bc1f35cddc0
 	github.com/kirsle/configdir v0.0.0-20170128060238-e45d2f54772f
 	github.com/mattn/go-runewidth v0.0.9
+	github.com/sethvargo/go-password v0.2.0
 	github.com/sirupsen/logrus v1.7.0
 	github.com/spf13/cobra v1.1.1
 	github.com/spf13/pflag v1.0.5

go.sum

@@ -231,6 +231,8 @@ github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/ryanuber/columnize v0.0.0-20160712163229-9b3edd62028f/go.mod h1:sm1tb6uqfes/u+d4ooFouqFdy9/2g9QGwK3SQygK0Ts=
 github.com/sean-/seed v0.0.0-20170313163322-e2103e2c3529/go.mod h1:DxrIzT+xaE7yg65j358z/aeFdxmN0P9QXhEzd20vsDc=
+github.com/sethvargo/go-password v0.2.0 h1:BTDl4CC/gjf/axHMaDQtw507ogrXLci6XRiLc7i/UHI=
+github.com/sethvargo/go-password v0.2.0/go.mod h1:Ym4Mr9JXLBycr02MFuVQ/0JHidNetSgbzutTr3zsYXE=
 github.com/shurcooL/sanitized_anchor_name v1.0.0 h1:PdmoCO6wvbs+7yrJyMORt4/BmY5IYyJwS/kOiWx8mHo=
 github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
 github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=