My answers to chapter 03 lab

ch03/lab/README.md

@@ -1,6 +1,15 @@
-kubectl apply -f deployments.yaml
+# Lab Assignment
+
+## Goal
+
+Deploy services for updated version of numbers app.
 
+## Tests
+
+```bash
+kubectl apply -f deployments.yaml
 kubectl get pods
+```
 
 > There are two versions of the web app
 
@@ -13,3 +22,22 @@ kubectl apply -f solution/services.yaml
 > http://localhost:8088
 
 ![](./solution/numbers-web-v2.png)
+
+
+## Steps
+
+1. deploy the applications from the application manifest
+2. inspect what pods are running
+   1. what services are already running?
+      1. only the k8s clusterip
+   2. what pods are already running?
+      1. three pods (api, web, web-v2)
+   3. if needed configure services in a separate file
+      1. configure a local service for the api
+      2. configure a load balancer, first select web v1
+
+## Learnings
+
+When reapplying a manifest, k8s knows what to patch or create.
+
+Selectors in services differ from pod templates in deployment; the `matchLabel:` is not needed in services.

ch03/lab/deployments.yaml

@@ -53,4 +53,4 @@ spec:
     spec:
       containers:
         - name: web
-          image: kiamol/ch03-numbers-web:v2
+          image: kiamol/ch03-numbers-web:v2

ch03/lab/services.yaml

@@ -0,0 +1,24 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: numbers-api
+spec:
+  ports:
+    - port: 80
+  selector:
+    app: lab-numbers-api
+    version: v1
+  type: ClusterIP
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: numbers-web
+spec:
+  ports:
+    - port: 8080
+      targetPort: 80
+  selector:
+    app: lab-numbers-web
+    version: v2
+  type: LoadBalancer