[chapter 08] finished other spin example and added wasmcloud k8s yamls

Signed-off-by: danbugs <[email protected]>

Author: danbugs

chapter08/hello-world-wasmcloud/README.md

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+# `hello-world-wasmcloud`
+
+- `wadm.yaml`: includes the `Application` CR to deploy a wasmCloud app to K8s.
+- `wasmcloud-host.yaml`: incldues the `WasmCloudHostConfig` CR to dpeloy a wasmCloud host to K8s.
+
+> Note: Usage of both files assumes you've installed the wasmcloud-operator onto your cluster.
+
+Once deployed, port forward the wasmcloud-host deployment and curl the app.

chapter08/hello-world-wasmcloud/wadm.yaml

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+apiVersion: core.oam.dev/v1beta1
+kind: Application
+metadata:
+  name: rust-hello-world
+  annotations:
+    description: 'HTTP hello world demo in Rust, using the WebAssembly Component Model and WebAssembly Interfaces Types (WIT)'
+spec:
+  components:
+    - name: http-component
+      type: component
+      properties:
+        image: ghcr.io/danbugs/serverside-wasm-book-code/hello-world-wasmcloud:v1
+      traits:
+        - type: spreadscaler
+          properties:
+            instances: 10
+        - type: link
+          properties:
+            namespace: wasi
+            package: keyvalue
+            interfaces: [store, atomics]
+            target:
+              name: kvnats
+              config:
+                - name: wasi-keyvalue-config
+                  properties:
+                    bucket: default
+                    enable_bucket_auto_create: 'true'
+
+    - name: httpserver
+      type: capability
+      properties:
+        image: ghcr.io/wasmcloud/http-server:0.23.2
+      traits:
+        - type: link
+          properties:
+            target: http-component
+            namespace: wasi
+            package: http
+            interfaces: [incoming-handler]
+            source_config:
+              - name: default-http
+                properties:
+                  address: 0.0.0.0:8080
+
+    - name: kvnats
+      type: capability
+      properties:
+        image: ghcr.io/wasmcloud/keyvalue-nats:0.3.1

chapter08/hello-world-wasmcloud/wasmcloud-host.yaml

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+apiVersion: k8s.wasmcloud.dev/v1alpha1
+kind: WasmCloudHostConfig
+metadata:
+  name: wasmcloud-host
+spec:
+  lattice: default
+  version: "1.4.1"
+  hostReplicas: 2

chapter08/scaling-spin/README.md

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+# `hello-world-spin`
+
+- 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 registry push ghcr.io/<your GH username>/serverside-wasm-book-code/scaling-spin:latest
+spin kube scaffold --from ghcr.io/<your GH username>/serverside-wasm-book-code/scaling-spin:latest --autoscaler hpa --cpu-limit 100m --memory-limit 128Mi --cpu-request 50m --memory-request 64Mi --replicas 1 --max-replicas 10 | kubectl create -f –
+```
+
+- Then, you can test it with:
+```shell
+# assuming an ingress controller was applied
+oha -c 40 -z 3m -t 5s http://localhost:8081/load
+```

chapter08/scaling-spin/config/knitwit.json

@@ -1,9 +1,14 @@
 {
-    "version": 1,
-    "project": {
-        "worlds": [
-            "spin-http"
-        ]
-    },
-    "packages": {}
+  "version": 1,
+  "project": {
+    "worlds": [
+      "spin-http"
+    ]
+  },
+  "packages": {
+    "@fermyon/spin-sdk": {
+      "witPath": "../../bin/wit",
+      "world": "spin-imports"
+    }
+  }
 }