First implementation

Author: ribbybibby

.drone.yml

@@ -0,0 +1,32 @@
+kind: pipeline
+type: kubernetes
+name: default
+
+steps:
+  - name: fetch
+    image: docker:git
+    commands:
+      - git fetch --tags
+
+  - name: docker-tag
+    image: alpine
+    commands:
+      - test "${DRONE_BRANCH}" == "master" && echo -n "latest," > .tags || true
+      - test -n "${DRONE_BRANCH}" && test "${DRONE_BRANCH}" != "master" && echo -n "${DRONE_BRANCH}," > .tags || true
+      - test -n "${DRONE_TAG}" && echo -n "${DRONE_TAG}," >> .tags || true
+      - sed -i "s/,$//" .tags
+
+  - name: docker-publish
+    image: plugins/docker
+    settings:
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password
+      repo: quay.io/utilitywarehouse/${DRONE_REPO_NAME}
+      registry: quay.io
+
+trigger:
+  event:
+    exclude:
+      - pull_request

.gitignore

@@ -0,0 +1 @@
+registry-browser

Dockerfile

@@ -0,0 +1,15 @@
+FROM golang:1.16-alpine AS build
+WORKDIR /go/src/github.com/utilitywarehouse/registry-browser
+COPY . /go/src/github.com/utilitywarehouse/registry-browser
+ENV CGO_ENABLED 0
+RUN apk --no-cache add git \
+  && go get -t ./... \
+  && go test ./... \
+  && go build -o /registry-browser .
+
+FROM alpine:3.13
+ADD templates /templates
+ADD static /static
+COPY --from=build /registry-browser /registry-browser
+
+ENTRYPOINT [ "/registry-browser" ]

README.md

@@ -1 +1,19 @@
 # registry-browser
+
+Depending on the storage driver you're using, listing repositories and tags via
+the docker registry API can be incredibly slow and resource intensive when you're
+storing a large number of objects. This makes implementing a performant UI for the
+registry using the API impractical.
+
+This project provides a responsive UI by listing objects directly from the
+storage backend and only calling the registry to retrieve manifest information.
+
+Storage drivers currently supported:
+- S3
+
+## Deployment
+
+A Kustomize base for deploying the browser can be found at
+[manifests/base](manifests/base).
+
+Refer to the [example](manifests/example).

go.mod

@@ -0,0 +1,13 @@
+module github.com/utilitywarehouse/registry-browser
+
+go 1.16
+
+require (
+	github.com/aws/aws-sdk-go v1.38.55
+	github.com/distribution/distribution/v3 v3.0.0-20210602065436-4f27e1934ccc
+	github.com/gorilla/mux v1.8.0
+	github.com/opencontainers/go-digest v1.0.0
+	golang.org/x/net v0.0.0-20210226172049-e18ecbb05110 // indirect
+	golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4 // indirect
+	golang.org/x/text v0.3.4 // indirect
+)

go.sum

@@ -0,0 +1,145 @@
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main.go

@@ -0,0 +1,56 @@
+package main
+
+import (
+	"flag"
+	"log"
+	"net/http"
+	"os"
+
+	"github.com/utilitywarehouse/registry-browser/registry"
+	"github.com/utilitywarehouse/registry-browser/s3"
+)
+
+var (
+	flagS3Bucket      = flag.String("s3-bucket", defaultFromEnv("REGISTRY_BROWSER_S3_BUCKET", ""), "S3 bucket name")
+	flagListenAddress = flag.String("listen-address", defaultFromEnv("REGISTRY_BROWSER_LISTEN_ADDRESS", ":8080"), "Listen address")
+	flagRegistryURL   = flag.String("registry-url", defaultFromEnv("REGISTRY_BROWSER_REGISTRY_URL", "http://localhost:5000"), "Registry url")
+)
+
+func defaultFromEnv(key, defaultValue string) string {
+	v := os.Getenv(key)
+	if len(v) == 0 {
+		return defaultValue
+	}
+
+	return v
+}
+
+func main() {
+	flag.Parse()
+
+	if *flagS3Bucket == "" {
+		log.Fatalln("Must provide an s3 bucket")
+	}
+
+	if *flagRegistryURL == "" {
+		log.Fatalln("Must provide a registry URL")
+	}
+
+	registryClient, err := registry.New(*flagRegistryURL)
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	s3Client, err := s3.New(*flagS3Bucket)
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	s, err := newServer(registryClient, s3Client)
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	log.Printf("Listening on %s", *flagListenAddress)
+	log.Fatalln(http.ListenAndServe(*flagListenAddress, s))
+}

manifests/base/kustomization.yaml

@@ -0,0 +1,8 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - registry-browser.yaml
+configMapGenerator:
+  - name: registry-browser
+    files:
+      - config.yml=resources/registry-config.yml

manifests/base/registry-browser.yaml

@@ -0,0 +1,65 @@
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    name: registry-browser
+  name: registry-browser
+spec:
+  selector:
+    app: registry-browser
+  ports:
+    - name: frontend
+      protocol: TCP
+      port: 8080
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: registry-browser
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      app: registry-browser
+  template:
+    metadata:
+      name: registry-browser
+      labels:
+        app: registry-browser
+    spec:
+      containers:
+        - name: registry-browser
+          image: quay.io/utilitywarehouse/registry-browser
+          resources:
+            requests:
+              cpu: 0m
+              memory: 4Mi
+            limits:
+              cpu: 100m
+              memory: 128Mi
+          ports:
+            - name: browser
+              containerPort: 8080
+        - name: registry
+          image: registry:2.7.1
+          resources:
+            requests:
+              cpu: 0m
+              memory: 32Mi
+            limits:
+              cpu: 200m
+              memory: 256Mi
+          ports:
+            - name: metrics
+              containerPort: 5002
+          volumeMounts:
+            - name: registry-config
+              mountPath: /etc/docker/registry/
+              readOnly: true
+      volumes:
+        - name: registry-config
+          configMap:
+            name: registry-browser
+            items:
+              - key: config.yml
+                path: config.yml

manifests/base/resources/registry-config.yml

@@ -0,0 +1,16 @@
+version: 0.1
+log:
+  accesslog:
+    disabled: true
+  level: warn
+storage:
+  s3:
+    encrypt: true
+  delete:
+    enabled: false
+http:
+  addr: localhost:5000
+  debug:
+    addr: :5002
+    prometheus:
+      enabled: true