fix(binary): persist CSRF auth file in a volume (#22)

* fix(binary): persist CSRF auth file in a volume

* docs(options): document the `-data` option

Dockerfile

@@ -2,5 +2,7 @@ FROM scratch
 
 COPY dist /
 
+VOLUME /data
+
 EXPOSE 9000
 ENTRYPOINT ["/ui-for-docker"]

README.md

@@ -76,6 +76,7 @@ The following options are available for the `ui-for-docker` binary:
 
 * `-endpoint`, `-e`: Docker deamon endpoint (default: *"/var/run/docker.sock"*)
 * `-bind`, `-p`: Address and port to serve UI For Docker (default: *":9000"*)
+* `-data`, `-d`: Path to the data folder (default: *"."*) 
 * `-assets`, `-a`: Path to the assets (default: *"."*)
 * `-swarm`, `-s`: Swarm cluster support (default: *false*)
 * `-hide-label`, `-l`: Hide containers with a specific label in the UI

dockerui.go

@@ -21,6 +21,7 @@ var (
 	endpoint = kingpin.Flag("endpoint", "Dockerd endpoint").Default("/var/run/docker.sock").Short('e').String()
 	addr 		 = kingpin.Flag("bind", "Address and port to serve UI For Docker").Default(":9000").Short('p').String()
 	assets   = kingpin.Flag("assets", "Path to the assets").Default(".").Short('a').String()
+	data		 = kingpin.Flag("data", "Path to the data").Default(".").Short('d').String()
 	swarm	   = kingpin.Flag("swarm", "Swarm cluster support").Default("false").Short('s').Bool()
 	labels   = LabelParser(kingpin.Flag("hide-label", "Hide containers with a specific label in the UI").Short('l'))
 	authKey  []byte
@@ -117,7 +118,7 @@ func createUnixHandler(e string) http.Handler {
 	return &UnixHandler{e}
 }
 
-func createHandler(dir string, e string, c Config) http.Handler {
+func createHandler(dir string, d string, e string, c Config) http.Handler {
 	var (
 		mux         = http.NewServeMux()
 		fileHandler = http.FileServer(http.Dir(dir))
@@ -137,11 +138,12 @@ func createHandler(dir string, e string, c Config) http.Handler {
 	}
 
 	// Use existing csrf authKey if present or generate a new one.
-	dat, err := ioutil.ReadFile(authKeyFile)
+	var authKeyPath = d + "/" + authKeyFile
+	dat, err := ioutil.ReadFile(authKeyPath)
 	if err != nil {
 		fmt.Println(err)
 		authKey = securecookie.GenerateRandomKey(32)
-		err := ioutil.WriteFile(authKeyFile, authKey, 0644)
+		err := ioutil.WriteFile(authKeyPath, authKey, 0644)
 		if err != nil {
 			fmt.Println("unable to persist auth key", err)
 		}
@@ -179,7 +181,7 @@ func main() {
 		HiddenLabels: *labels,
 	}
 
-	handler := createHandler(*assets, *endpoint, configuration)
+	handler := createHandler(*assets, *data, *endpoint, configuration)
 	if err := http.ListenAndServe(*addr, handler); err != nil {
 		log.Fatal(err)
 	}

gruntFile.js

@@ -260,14 +260,14 @@ module.exports = function (grunt) {
                 command: [
                     'docker stop ui-for-docker',
                     'docker rm ui-for-docker',
-                    'docker run --privileged -d -p 9000:9000 -v /var/run/docker.sock:/var/run/docker.sock --name ui-for-docker ui-for-docker'
+                    'docker run --privileged -d -p 9000:9000 -v /tmp/docker-ui:/data -v /var/run/docker.sock:/var/run/docker.sock --name ui-for-docker ui-for-docker -d /data'
                 ].join(';')
             },
             runSwarm: {
                 command: [
                     'docker stop ui-for-docker',
                     'docker rm ui-for-docker',
-                    'docker run --privileged -d -p 9000:9000 --name ui-for-docker ui-for-docker -e http://10.0.7.10:4000 -swarm'
+                    'docker run --privileged -d -p 9000:9000 -v /tmp/docker-ui:/data --name ui-for-docker ui-for-docker -e http://10.0.7.10:4000 -swarm -d /data'
                 ].join(';')
             },
             cleanImages: {