Solution

.infrastructure/app/deployment.yml

@@ -90,4 +90,23 @@ spec:
           secretName: app-secret
       - name: app-config-volume
         configMap:
-          name: app-config
+          name: app-config
+      affinity:
+        nodeAffinity:
+          preferredDuringSchedulingIgnoredDuringExecution:
+            - weight: 1
+              preference:
+                matchExpressions:
+                  - key: app
+                    operator: In
+                    values:
+                      - todoapp
+        podAntiAffinity:
+          requiredDuringSchedulingIgnoredDuringExecution:
+            - labelSelector:
+                matchExpressions:
+                  - key: "app"
+                    operator: In
+                    values:
+                      - todoapp
+              topologyKey: "kubernetes.io/hostname"

.infrastructure/mysql/statefulSet.yml

@@ -64,6 +64,29 @@ spec:
       - name: config-map
         configMap:
           name: mysql
+      tolerations:
+      - key: "app"
+        operator: "Equal"
+        value: "mysql"
+        effect: "NoSchedule"
+      affinity:
+        nodeAffinity:
+          requiredDuringSchedulingIgnoredDuringExecution:
+            nodeSelectorTerms:
+            - matchExpressions:
+              - key: app
+                operator: In
+                values:
+                - mysql
+        podAntiAffinity:
+          requiredDuringSchedulingIgnoredDuringExecution:
+            - labelSelector:
+                matchExpressions:
+                - key: "app"
+                  operator: In
+                  values:
+                  - mysql
+              topologyKey: "kubernetes.io/hostname" 
   volumeClaimTemplates:
   - metadata:
       name: data

README.md

@@ -45,3 +45,43 @@ Create a kubernetes manifest for a pod which will containa ToDo app container:
 1. `bootstrap.sh` should containe all the commands to deploy all the required resources in the cluster
 1. `README.md` should have instructuions on how to validate the changes
 1. Create PR with your changes and attach it for validation on a platform.
+
+
+## How to Validate the Changes
+
+### Create Kubernetes Cluster
+
+`kind create cluster --config=cluster.yml`
+
+### Run Bootstrap Script
+
+`./bootstrap.sh`
+
+
+### Verify the Deployment
+
+Check the list of pods
+
+`kubectl get pods -n todoapp` 
+
+
+### Checking Resource Scheduling and Allocation
+
+Verify Pod Scheduling
+
+`kubectl get pods -o wide -n todoapp`
+
+
+Get Pod Details
+
+`kubectl describe pod <pod_name>`
+
+
+### Node Affinity and Taints Verification
+
+Check Node Affinity
+
+`kubectl get nodes --show-labels`
+
+
+

bootstrap.sh

@@ -1,4 +1,5 @@
 #!/bin/bash
+kubectl taint nodes -l app=mysql app=mysql:NoSchedule
 kubectl apply -f .infrastructure/mysql/ns.yml
 kubectl apply -f .infrastructure/mysql/configMap.yml
 kubectl apply -f .infrastructure/mysql/secret.yml