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:
+        podAntiAffinity:
+          requiredDuringSchedulingIgnoredDuringExecution:
+          - labelSelector:
+              matchExpressions:
+              - key: app
+                operator: In
+                values:
+                - mysql
+            topologyKey: "kubernetes.io/hostname"
+        nodeAffinity:
+          requiredDuringSchedulingIgnoredDuringExecution:
+            nodeSelectorTerms:
+            - matchExpressions:
+              - key: app
+                operator: In
+                values:
+                - mysql
   volumeClaimTemplates:
   - metadata:
       name: data

README.md

@@ -45,3 +45,13 @@ 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.
+
+To validate the changes use next command:
+
+    kubectl get pods -o wide -n mysql
+
+in result you can see that pod mysql run in nodes with mysql label, each in different nodes.
+
+    kubectl get pods -o wide -n todoapp
+
+and  also just for pods todoapp