fix(minio): add support for minio

Author: Keerthan Mala

Dockerfile

@@ -1,7 +1,7 @@
 FROM alpine:3.3
 
-ENV DOCKER_REGISTRY_TAG=radosgw \
-    DOCKER_REGISTRY_REPO=https://github.com/kmala/distribution.git \
+ENV DOCKER_REGISTRY_TAG=minio \
+    DOCKER_REGISTRY_REPO=https://github.com/deis/distribution.git \
     DOCKER_BUILDTAGS=include_gcs
 
 # install registry binaries

main.go

@@ -1,21 +1,25 @@
 package main
 
 import (
+	"fmt"
 	"io/ioutil"
 	"log"
 	"os"
 	"os/exec"
 )
 
 const (
-	registryBinary = "/bin/registry"
-	registryConfig = "/etc/docker/registry/config.yml"
+	registryBinary  = "/bin/registry"
+	registryConfig  = "/etc/docker/registry/config.yml"
+	minioHostEnvVar = "DEIS_MINIO_SERVICE_HOST"
+	minioPortEnvVar = "DEIS_MINIO_SERVICE_PORT"
 )
 
 func main() {
 	log.Println("INFO: Starting registry...")
 	storageType := getenv("REGISTRY_STORAGE", "filesystem")
 	if storageType == "gcs" {
+		log.Println("INFO: using google cloud storage as the backend")
 		if _, err := os.Stat("/var/run/secrets/deis/registry/creds/key.json"); err != nil {
 			log.Fatal("Service account not given")
 		}
@@ -25,7 +29,8 @@ func main() {
 		} else {
 			os.Setenv("REGISTRY_STORAGE_GCS_BUCKET", string(bucket))
 		}
-	} else if storageType == "generic" {
+	} else if storageType == "s3" {
+		log.Println("INFO: using s3 as the backend")
 		if accesskey, err := ioutil.ReadFile("/var/run/secrets/deis/registry/creds/accesskey"); err != nil {
 			log.Fatal(err)
 		} else {
@@ -50,6 +55,7 @@ func main() {
 			os.Setenv("REGISTRY_STORAGE_S3_BUCKET", string(bucket))
 		}
 	} else if storageType == "azure" {
+		log.Println("INFO: using azure as the backend")
 		if accountname, err := ioutil.ReadFile("/var/run/secrets/deis/registry/creds/accountname"); err != nil {
 			log.Fatal(err)
 		} else {
@@ -68,6 +74,29 @@ func main() {
 			os.Setenv("REGISTRY_STORAGE_AZURE_CONTAINER", string(container))
 		}
 
+	} else if storageType == "minio" {
+		log.Println("INFO: using minio as the backend")
+		mHost := os.Getenv(minioHostEnvVar)
+		mPort := os.Getenv(minioPortEnvVar)
+		os.Setenv("REGISTRY_STORAGE", "s3")
+		os.Setenv("REGISTRY_STORAGE_S3_BACKEND", "minio")
+		os.Setenv("REGISTRY_STORAGE_S3_REGIONENDPOINT", fmt.Sprintf("http://%s:%s", mHost, mPort))
+
+		if accesskey, err := ioutil.ReadFile("/var/run/secrets/deis/registry/creds/access-key-id"); err != nil {
+			log.Fatal(err)
+		} else {
+			os.Setenv("REGISTRY_STORAGE_S3_ACCESSKEY", string(accesskey))
+		}
+
+		if secretkey, err := ioutil.ReadFile("/var/run/secrets/deis/registry/creds/access-secret-key"); err != nil {
+			log.Fatal(err)
+		} else {
+			os.Setenv("REGISTRY_STORAGE_S3_SECRETKEY", string(secretkey))
+		}
+
+		os.Setenv("REGISTRY_STORAGE_S3_REGION", "us-east-1")
+		os.Setenv("REGISTRY_STORAGE_S3_BUCKET", "registry")
+
 	}
 
 	cmd := exec.Command(registryBinary, registryConfig)