feat: adds generate subcommand to auto generate users.yml (#2939)

docs/components.d.ts

@@ -1,10 +1,10 @@
 /* eslint-disable */
-/* prettier-ignore */
 // @ts-nocheck
 // Generated by unplugin-vue-components
 // Read more: https://github.com/vuejs/core/pull/3399
 export {}
 
+/* prettier-ignore */
 declare module 'vue' {
   export interface GlobalComponents {
     BrowserWindow: typeof import('./.vitepress/theme/components/BrowserWindow.vue')['default']

docs/guide/authentication.md

@@ -24,9 +24,10 @@ users:
     email: me@email.net
 ```
 
-Dozzle uses `email` to generate avatars using [Gravatar](https://gravatar.com/). It is optional.
+> [!TIP]
+> This file can be generated with `docker run amir20/dozzle generate` with v6.6.x. See [below](#generating-users-yml) for more details.
 
-The password is hashed using `sha256` which can be generated with `echo -n 'secret-password' | shasum -a 256` or `echo -n 'secret-password' | sha256sum` on linux.
+Dozzle uses `email` to generate avatars using [Gravatar](https://gravatar.com/). It is optional. The password is hashed using `sha256` which can be generated with `echo -n 'secret-password' | shasum -a 256` or `echo -n 'secret-password' | sha256sum` on linux.
 
 You will need to mount this file for Dozzle to find it. Here is an example:
 
@@ -64,6 +65,16 @@ users:
 
 Dozzle uses [JWT](https://en.wikipedia.org/wiki/JSON_Web_Token) to generate tokens for authentication. This token is saved in a cookie.
 
+### Generating users.yml
+
+Starting with version `v6.6.x`, Dozzle has a builtin `generate` sub-command which can be used to create a `users.yml`.
+
+```sh
+docker run amir20/dozzle generate admin --password password --email test@email.net --name "John Doe" > users.yml
+```
+
+In this example, `admin` is the username. Email and name are optional but recommended to display accurate avatars. `docker run amir20/dozzle generate --help` displays all options.
+
 ## Forward Proxy
 
 Dozzle can be configured to read proxy headers by setting `--auth-provider` to `forward-proxy`.

internal/auth/users.go

@@ -1,6 +1,7 @@
 package auth
 
 import (
+	"bytes"
 	"context"
 	"crypto/sha256"
 	"encoding/hex"
@@ -16,7 +17,7 @@ import (
 )
 
 type User struct {
-	Username string `json:"username"`
+	Username string `json:"username" yaml:"-"`
 	Email    string `json:"email" yaml:"email"`
 	Name     string `json:"name" yaml:"name"`
 	Password string `json:"-" yaml:"password"`
@@ -56,6 +57,24 @@ func ReadUsersFromFile(path string) (UserDatabase, error) {
 	return users, nil
 }
 
+func GenerateUsers(user User, hashPassword bool) *bytes.Buffer {
+	buffer := &bytes.Buffer{}
+
+	if hashPassword {
+		user.Password = sha256sum(user.Password)
+	}
+
+	users := UserDatabase{
+		Users: map[string]*User{
+			user.Username: &user,
+		},
+	}
+
+	yaml.NewEncoder(buffer).Encode(users)
+
+	return buffer
+}
+
 func decodeUsersFromFile(path string) (UserDatabase, error) {
 	users := UserDatabase{}
 	file, err := os.Open(path)

main.go

@@ -33,8 +33,6 @@ type args struct {
 	Base                 string              `arg:"env:DOZZLE_BASE" default:"/" help:"sets the base for http router."`
 	Hostname             string              `arg:"env:DOZZLE_HOSTNAME" help:"sets the hostname for display. This is useful with multiple Dozzle instances."`
 	Level                string              `arg:"env:DOZZLE_LEVEL" default:"info" help:"set Dozzle log level. Use debug for more logging."`
-	Username             string              `arg:"env:DOZZLE_USERNAME" help:"sets the username for auth."`
-	Password             string              `arg:"env:DOZZLE_PASSWORD" help:"sets password for auth"`
 	AuthProvider         string              `arg:"--auth-provider,env:DOZZLE_AUTH_PROVIDER" default:"none" help:"sets the auth provider to use. Currently only forward-proxy is supported."`
 	AuthHeaderUser       string              `arg:"--auth-header-user,env:DOZZLE_AUTH_HEADER_USER" default:"Remote-User" help:"sets the HTTP Header to use for username in Forward Proxy configuration."`
 	AuthHeaderEmail      string              `arg:"--auth-header-email,env:DOZZLE_AUTH_HEADER_EMAIL" default:"Remote-Email" help:"sets the HTTP Header to use for email in Forward Proxy configuration."`
@@ -43,14 +41,23 @@ type args struct {
 	EnableActions        bool                `arg:"--enable-actions,env:DOZZLE_ENABLE_ACTIONS" default:"false" help:"enables essential actions on containers from the web interface."`
 	FilterStrings        []string            `arg:"env:DOZZLE_FILTER,--filter,separate" help:"filters docker containers using Docker syntax."`
 	Filter               map[string][]string `arg:"-"`
-	Healthcheck          *HealthcheckCmd     `arg:"subcommand:healthcheck" help:"checks if the server is running."`
 	RemoteHost           []string            `arg:"env:DOZZLE_REMOTE_HOST,--remote-host,separate" help:"list of hosts to connect remotely"`
 	NoAnalytics          bool                `arg:"--no-analytics,env:DOZZLE_NO_ANALYTICS" help:"disables anonymous analytics"`
+
+	Healthcheck *HealthcheckCmd `arg:"subcommand:healthcheck" help:"checks if the server is running"`
+	Generate    *GenerateCmd    `arg:"subcommand:generate" help:"generates a configuration file for simple auth"`
 }
 
 type HealthcheckCmd struct {
 }
 
+type GenerateCmd struct {
+	Username string `arg:"positional"`
+	Password string `arg:"--password, -p" help:"sets the password for the user"`
+	Name     string `arg:"--name, -n" help:"sets the display name for the user"`
+	Email    string `arg:"--email, -e" help:"sets the email for the user"`
+}
+
 func (args) Version() string {
 	return version
 }
@@ -59,12 +66,32 @@ func (args) Version() string {
 var content embed.FS
 
 func main() {
-	args := parseArgs()
+	args, subcommand := parseArgs()
 	validateEnvVars()
-	if args.Healthcheck != nil {
+	if subcommand != nil {
+		switch subcommand.(type) {
+		case *HealthcheckCmd:
 			if err := healthcheck.HttpRequest(args.Addr, args.Base); err != nil {
 				log.Fatal(err)
 			}
+
+		case *GenerateCmd:
+			if args.Generate.Username == "" || args.Generate.Password == "" {
+				log.Fatal("Username and password are required")
+			}
+
+			buffer := auth.GenerateUsers(auth.User{
+				Username: args.Generate.Username,
+				Password: args.Generate.Password,
+				Name:     args.Generate.Name,
+				Email:    args.Generate.Email,
+			}, true)
+
+			if _, err := os.Stdout.Write(buffer.Bytes()); err != nil {
+				log.Fatal(err)
+			}
+		}
+
 		os.Exit(0)
 	}
 
@@ -257,7 +284,7 @@ func createLocalClient(args args, localClientFactory func(map[string][]string) (
 	return nil, errors.New("could not connect to local Docker Engine")
 }
 
-func parseArgs() args {
+func parseArgs() (args, interface{}) {
 	var args args
 	parser := arg.MustParse(&args)
 
@@ -275,10 +302,7 @@ func parseArgs() args {
 		args.Filter[key] = append(args.Filter[key], val)
 	}
 
-	if args.Username != "" || args.Password != "" {
-		log.Fatal("Using --username and --password is removed on v6.x. See https://github.com/amir20/dozzle/issues/2630 for details.")
-	}
-	return args
+	return args, parser.Subcommand()
 }
 
 func configureLogger(level string) {