Add kubernetes deployment yaml as option (#30)

* first try at deployment yaml

* added service

* working k3s config

* brief addition to readme

* removed comments

* backend now works in kubernetes, and usb should as well

* moved service to top

* ingress comment

---------

Co-authored-by: Max McKelvey <maxmckelvey@Maxs-MBP.positronix.local>

README.md

@@ -55,10 +55,13 @@ Before creating the component, run `sudo usermod -aG docker ggc_user` on your Gr
 
 ### Running with Kubernetes
 
-_coming soon_
-
 We recommend a minimal Kubernetes install like [k3s](https://k3s.io/).
 
+> Use the file [`kubernetes.yaml`](./deploy/kubernetes.yaml) file.
+
+1. Create a Kubernetes cluster and install `kubectl` on your machine.
+2. Run `kubectl apply -f kubernetes.yaml` in the same directory as the `kubernetes.yaml` file.
+
 ## Building from Source
 
 1. Install [Node.js](https://nodejs.org/en/download/) and [Python 3.8+](https://www.python.org/downloads/).

deploy/kubernetes.yaml

@@ -0,0 +1,71 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: monitoring-notification-service
+spec:
+  selector:
+    app: monitoring-notification-deployment
+  ports:
+  - port: 80
+    targetPort: 3000
+    protocol: TCP
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: monitoring-notification-deployment
+  labels:
+    app: monitoring-notification-deployment
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: monitoring-notification-deployment
+  template:
+    metadata:
+      labels:
+        app: monitoring-notification-deployment
+    spec:
+      containers:
+        - name: monitoring-notification-server-backend
+          image: docker.io/groundlight/monitoring-notification-server-backend:latest
+          imagePullPolicy: IfNotPresent
+          ports:
+            - containerPort: 8000
+          securityContext:
+            privileged: true
+          volumeMounts:
+            - name: usb
+              mountPath: /dev/bus/usb
+        - name: monitoring-notification-server-frontend
+          image: docker.io/groundlight/monitoring-notification-server-frontend:latest
+          imagePullPolicy: IfNotPresent
+          ports:
+            - containerPort: 3000
+          env:
+            - name: BACKEND_BASE_URL
+              value: "http://0.0.0.0:8000"
+      volumes:
+      - name: usb
+        hostPath:
+          path: /dev/bus/usb
+---
+# Ingress to make the service accessible from outside the cluster
+# This is necessary if you want to access the application's web interface
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: monitoring-notification-service
+  annotations:
+    ingress.kubernetes.io/ssl-redirect: "false"
+spec:
+  rules:
+  - http:
+      paths:
+      - path: /
+        pathType: Prefix
+        backend:
+          service:
+            name: monitoring-notification-service
+            port:
+              number: 80

middleware.ts

@@ -0,0 +1,24 @@
+import { NextResponse } from "next/server";
+import type { NextRequest } from "next/server";
+
+// This function can be marked `async` if using `await` inside
+export function middleware(request: NextRequest) {
+    console.log("middleware!");
+    console.log("Request url: " + request.url);
+
+    let baseUrl = "http://localhost:8000";
+    if (process.env.NODE_ENV === "production") {
+        baseUrl = "http://172.17.0.1:8000";
+    }
+    if (global.process.env.BACKEND_BASE_URL) {
+        baseUrl = global.process.env.BACKEND_BASE_URL;
+    }
+    const redirectUrl = new URL(request.nextUrl.pathname, baseUrl);
+    console.log("Rewritten to: " + redirectUrl.toJSON() + "\n");
+    return NextResponse.rewrite(redirectUrl);
+}
+
+// See "Matching Paths" below to learn more
+export const config = {
+    matcher: "/api/:path*",
+};

next.config.js

@@ -1,18 +1,5 @@
 /** @type {import('next').NextConfig} */
 const nextConfig = {
-  rewrites: async () => {
-    return [
-      {
-        source: "/api/:path*",
-        destination:
-          process.env.NODE_ENV === "development"
-            // ? "http://127.0.0.1:8000/api/:path*"
-            ? "http://0.0.0.0:8000/api/:path*"
-            : ("http://172.17.0.1:8000/api/:path*"),
-            // : "/api/",
-      },
-    ];
-  },
   output: 'standalone'
 };