Implement a proof of concept OCI registry for devfiles

LICENSE

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README.md

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 # registry-support
+
 Provide support for devfile registries
 
-Issue tracking repo: https://github.com/devfile/api with label `area/registry`
+Issue tracking repo: https://github.com/devfile/api with label area/registry
+
+## Architecture
+
+### Registry
+
+A standard OCI registry, currently using the [reference implementation from Docker](https://hub.docker.com/_/registry). Devfile artifacts are fed into it via the `devfile-registry-metadata` container upon startup.
+
+![Registry Architecture](https://user-images.githubusercontent.com/606959/88183913-5e417280-cc32-11ea-9509-651bb44d9280.png)
+
+### Metadata Container
+
+The `oci-devfile-registry-metadata` container is a sidecar deployed alongside the OCI registry that has two purposes:
+1) Pre-loading the devfiles into the registry upon startup
+2) Generating and hosting the [index.json](https://raw.githubusercontent.com/odo-devfiles/registry/master/devfiles/index.json) for devfile consumers
+
+## Deploy
+
+### OpenShift
+
+1) `cd deploy/openshift`
+2) Set the value of `$HOST` in `route.yaml` to your routing suffix (such as apps.devcluster.example.com)
+3) Run `oc apply -f registry.yaml`
+4) Run `oc apply -f route.yaml`

deploy/kubernetes/ingress.yaml

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+apiVersion: extensions/v1beta1
+kind: Ingress
+metadata:
+  name: devfile-registry-ingress
+spec:
+  rules:
+  - host: $HOST
+    http:
+      paths:
+      - backend:
+          serviceName: devfile-registry
+          servicePort: 8080
+        path: /devfiles
+        pathType: ImplementationSpecific
+---
+apiVersion: extensions/v1beta1
+kind: Ingress
+metadata:
+  name: registry-ingress
+spec:
+  rules:
+  - host: $HOST
+    http:
+      paths:
+      - backend:
+          serviceName: devfile-registry
+          servicePort: 5000
+        path: /

deploy/kubernetes/registry.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: devfile-registry
+  labels:
+    app: devfile-registry
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: devfile-registry
+  template:
+    metadata:
+      labels:
+        app: devfile-registry
+    spec:
+      volumes:
+        - name: registry-storage
+          persistentVolumeClaim:
+            claimName: registry-storage-claim
+      containers:
+      - name: devfile-registry-metadata
+        image: docker.io/johncollier/oci-devfile-registry-metadata:latest
+        ports:
+        - containerPort: 8080
+      - name: devfile-registry
+        image: registry:latest
+        ports:
+        - containerPort: 5000
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: devfile-registry
+  labels:
+    app: devfile-registry
+spec:
+  ports:
+    - port: 8080
+      name: devfile-registry-metadata
+    - port: 5000
+      name: devfile-registry
+  selector:
+    app: devfile-registry
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: registry-storage-claim
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 3Gi