add steps to readme

Signed-off-by: Sven Pfennig <[email protected]>

podtato-head/README.md

@@ -2,20 +2,31 @@
 
 ## Setup
 
-- Set up cluster
-kind create cluster --image kindest/node:v1.29.0
-- ~~Set up container registry~~
-- Install KWasm
+- [ ] Set up a cluster
+- [ ] Configure a container registry
+- [ ] Install KWasm
+```sh
 helm install -n kwasm --create-namespace kwasm-operator kwasm/kwasm-operator --set kwasmOperator.autoProvision=true
-- Check out repository
-- Build podtatohead
-docker build podtato-head-microservices/crates/podtato-entry -t 0xe282b0/podtato-head-entry --push
-docker build podtato-head-microservices/crates/podtato-parts -t 0xe282b0/podtato-head-parts --push
+```
+- Check out this repository
+```sh
+git clone https://github.com/Liquid-Reply/kwasm-demos.git
+```
 - Deploy podtatohead
 ```sh
+helm upgrade \
+  --install podtato-head ./delivery/chart
+```
+- Build podtatohead Wasm
+```sh
+docker build podtato-head-microservices/crates/podtato-entry -t <REGISTRY> /podtato-head-entry --push
+docker build podtato-head-microservices/crates/podtato-parts -t <REGISTRY> /podtato-head-parts --push
+```
+- Deploy podtatohead Wasm
+```sh
 helm upgrade \
   --install podtato-head ./delivery/chart \
-  --set images.repositoryDirname=0xe282b0 \
+  --set images.repositoryDirname=<REGISTRY> \
   --set images.pullPolicy=Always \
   --set entry.repositoryBasename=podtato-head-entry \
   --set entry.runtimeClassName=wasmedge \
@@ -33,20 +44,28 @@ helm upgrade \
 
 ## Exercise 1: Add Logging
 
-## Exercise 2: Add Probes
-- Startup Probe
-- Readiness Probe
-- Liveness Probe
+## Exercise 2: Health Checks
+- [ ] Startup Probe
+- [ ] Readiness Probe
+- [ ] Liveness Probe
 
 ## Exercise 3: Add Metrics
 - Metrics Endpoint
 
 ## Exercise 4: Add Tracing
-- Host Functions
-- Guest Instrumentation
+- https://github.com/open-telemetry/opentelemetry-rust/issues/1478
+- 
 
 ## Exercise 5: Load Testing
 - K6
+```sh
+helm repo add grafana https://grafana.github.io/helm-charts
+helm install k6-operator grafana/k6-operator
+```
 
 ## Exercise 6: Chaos Testing
-- Chaos Mesh
+- Chaos Mesh
+```sh
+helm repo add chaos-mesh https://charts.chaos-mesh.org
+helm install chaos-mesh chaos-mesh/chaos-mesh -n=chaos-mesh --set chaosDaemon.runtime=containerd --set chaosDaemon.socketPath=/run/k3s/containerd/containerd.sock --version 2.6.3 --create-namespace
+```

podtato-head/podtato-head-microservices/crates/podtato-entry/src/main.rs

@@ -31,8 +31,10 @@ async fn serve_req(
             Some(&_) => todo!(),
             None => todo!(),
         };
-        let res = reqwest::get(url).await.unwrap();
-        let content_data = res.text().await.unwrap();
+        let content_data = match fetch_data(&url).await {
+            Ok(data) => data,
+            Err(_) => String::new()
+        };
         let mut response = Response::new(Full::new(Bytes::from(content_data)));
         if url.ends_with(".svg") {
             response
@@ -45,7 +47,6 @@ async fn serve_req(
         let content = Assets::get(&path);
         return match content {
             Some(content) => {
-                println!("FOUND: {}", path);
                 let content_data = content.data.to_vec();
                 let mut response = Response::new(Full::new(Bytes::from(content_data)));
                 if path.ends_with(".svg") {
@@ -71,6 +72,10 @@ async fn serve_req(
     }
 }
 
+async fn fetch_data(url: &str) ->  Result<String, reqwest::Error>  {
+   Ok(reqwest::get(url).await?.text().await?)
+}
+
 #[tokio::main(flavor = "current_thread")]
 pub async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
     let port = env::var("PODTATO_PORT").unwrap_or("9000".to_string());