[chapter08] another spin example

Signed-off-by: danbugs <danilochiarlone@gmail.com>

Author: danbugs

chapter08/hello-world-spin/README.md

@@ -1,13 +1,23 @@
 # `hello-world-spin`
 
-- Assuming you have `spin` installed, run:
+- Pre-reqs:
+    - K8s cluster w/ the container-spin-shim installed on every node.
+    - cert-manager installed onto the cluster.
+    - Spin's RuntimeClass applied.
+    - Spin's CRDs applied.
+    - Spin's operator installed.
+    - Spin's executor created.
 
+
+- Then, assuming you have `spin` installed, run:
 ```shell
 spin build
-spin up
+spin registry push ghcr.io/<your GH username>/serverside-wasm-book-code/hello-world-spin:latest
+spin kube scaffold --from ghcr.io/danbugs/serverside-wasm-book-code/hello-world-spin:latest | kubectl create -f -
 ```
 
 - Then, you can test it with:
 ```shell
-curl http://127.0.0.1:3000
+kubectl port-forward svc/hello-world-spin 8083:80
+curl localhost:8083/
 ```

chapter08/scaling-spin/.gitignore

@@ -0,0 +1,5 @@
+node_modules
+dist
+target
+.spin/
+build/

chapter08/scaling-spin/.npmrc

@@ -0,0 +1 @@
+KNITWIT_SOURCE=./config/knitwit.json

chapter08/scaling-spin/config/knitwit.json

@@ -0,0 +1,9 @@
+{
+    "version": 1,
+    "project": {
+        "worlds": [
+            "spin-http"
+        ]
+    },
+    "packages": {}
+}

chapter08/scaling-spin/ingress.yaml

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+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: nginx
+  annotations:
+    ingress.kubernetes.io/ssl-redirect: "false"
+spec:
+  rules:
+  - http:
+      paths:
+      - path: /
+        pathType: Prefix
+        backend:
+          service:
+            name: scaling-spin
+            port:
+              number: 80

chapter08/scaling-spin/package.json

@@ -0,0 +1,23 @@
+{
+    "name": "scaling-spin",
+    "version": "1.0.0",
+    "description": "",
+    "main": "index.js",
+    "scripts": {
+        "build": "knitwit --out-dir build/wit/knitwit --out-world combined && npx webpack --mode=production && npx mkdirp dist && npx j2w -i build/bundle.js -d build/wit/knitwit -n combined -o dist/scaling-spin.wasm",
+        "test": "echo \"Error: no test specified\" && exit 1"
+    },
+    "keywords": [],
+    "author": "",
+    "license": "ISC",
+    "devDependencies": {
+        "mkdirp": "^3.0.1",
+        "webpack": "^5.74.0",
+        "webpack-cli": "^4.10.0",
+        "@fermyon/knitwit": "0.3.0"
+    },
+    "dependencies": {
+        "@fermyon/spin-sdk": "^3.0.0",
+        "itty-router": "^5.0.18"
+    }
+}

chapter08/scaling-spin/spin.toml

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+spin_manifest_version = 2
+
+[application]
+authors = ["danbugs <danilochiarlone@gmail.com>"]
+description = ""
+name = "scaling-spin"
+version = "0.1.0"
+
+[[trigger.http]]
+route = "/..."
+component = "scaling-spin"
+
+[component.scaling-spin]
+source = "dist/scaling-spin.wasm"
+exclude_files = ["**/node_modules"]
+[component.scaling-spin.build]
+command = ["npm install", "npm run build"]
+watch = ["src/**/*.js"]

chapter08/scaling-spin/src/index.js

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+// For AutoRouter documentation refer to https://itty.dev/itty-router/routers/autorouter
+import { AutoRouter } from 'itty-router';
+
+let router = AutoRouter();
+
+// Route ordering matters, the first route that matches will be used
+// Any route that does not return will be treated as a middleware
+// Any unmatched route will return a 404
+router
+    .get("/", () => new Response("hello universe"))
+    .get('/hello/:name', ({ name }) => `Hello, ${name}!`)
+
+addEventListener('fetch', (event) => {
+    event.respondWith(router.fetch(event.request));
+});

chapter08/scaling-spin/webpack.config.js

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+const path = require('path');
+const SpinSdkPlugin = require("@fermyon/spin-sdk/plugins/webpack")
+
+module.exports = {
+    entry: './src/index.js',
+    experiments: {
+        outputModule: true,
+    },
+    output: {
+        path: path.resolve(__dirname, './build'),
+        filename: 'bundle.js',
+        module: true,
+        library: {
+            type: "module",
+        }
+    },
+    plugins: [
+        new SpinSdkPlugin()
+    ],
+    optimization: {
+        minimize: false
+    },
+    performance: {
+        hints: false,
+    }
+};