Solution

.gitignore

@@ -1,3 +1,2 @@
-
-*/*/__pycache__/*
-*/*/*/__pycache__/*
+.idea
+DS_Store

.infrastructure/busybox.yaml

@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: busybox
+  namespace: todoapp
+spec:
+  containers:
+    - name: busybox
+      image: ikulyk404/busyboxplus:curl
+      imagePullPolicy: IfNotPresent
+      args:
+        - sleep
+        - "1000"

.infrastructure/namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: todoapp

.infrastructure/todoapp-pod.yaml

@@ -0,0 +1,28 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: todoapp
+  labels:
+    role: todoapp
+spec:
+  containers:
+    - name: todoapp
+      image: vpcomtek/todoapp:3.0.0
+      imagePullPolicy: IfNotPresent
+      ports:
+        - name: todoapp
+          containerPort: 8080
+          protocol: TCP
+      livenessProbe:
+        httpGet:
+          path: api/liveness
+          port: 8080
+        initialDelaySeconds: 60
+        periodSeconds: 5
+      readinessProbe:
+        httpGet:
+          path: api/readiness
+          port: 8080
+        initialDelaySeconds: 5
+        periodSeconds: 5
+

Dockerfile

@@ -0,0 +1,12 @@
+FROM python:3.8
+
+WORKDIR /app
+
+COPY ./src /app
+
+RUN pip install --upgrade pip && \
+    pip install -r requirements.txt
+
+EXPOSE 8080
+
+ENTRYPOINT ["sh", "-c", "python manage.py migrate && python manage.py runserver 0.0.0.0:8080"]

INSTRUCTION.md

@@ -0,0 +1,32 @@
+# Instruction
+### How to Apply All Manifests
+```
+kubectl apply -f .infrastructure/namespace.yml
+kubectl apply -f .infrastructure/busybox.yml
+kubectl apply -f .infrastructure/todoapp-pod.yml
+```
+### Testing ToDo Application Using port-forward
+```
+kubectl port-forward pod/todoapp -n todoapp 8000:8000
+```
+- Visit http://localhost:8000 to access the application.
+### Testing Application Using busyboxplus:curl
+```
+kubectl exec -it busybox -n todoapp -- curl http://todoapp:8000
+kubectl exec -it busybox -n todoapp -- curl http://todoapp:8000/readiness
+kubectl exec -it busybox -n todoapp -- curl http://todoapp:8000/liveness
+```
+or 
+
+1. Retrieve the IP address of the TodoApp pod:
+```
+kubectl get pods -n todoapp -o wide
+```
+2. Access the BusyBox shell:
+```
+kubectl -n todoapp exec -it busybox -- sh
+```
+3. Send a curl request to the TodoApp:
+```
+curl <TodoApp_IP_address>:8080
+```

src/api/urls.py

@@ -10,5 +10,7 @@
 
 app_name = "api"
 urlpatterns = [
-    path("", include(router.urls))
+    path("", include(router.urls)),
+    path("readiness/", views.readiness, name="readiness"),
+    path("liveness/", views.liveness, name="liveness")
 ]

src/api/views.py

@@ -55,4 +55,17 @@ class TodoViewSet(viewsets.ModelViewSet):
     def perform_create(self, serializer):
         user = self.request.user
         creator = user if user.is_authenticated else None
-        serializer.save(creator=creator)
+        serializer.save(creator=creator)
+
+start_time = time.time()
+delay_time = 40
+
+def readiness (request):
+    if time.time() < start_time + delay_time:
+        return HttpResponse("Not ready", status=503)
+    else:
+        return HttpResponse("Ready", status=200)
+
+def liveness(request):
+    return HttpResponse("Alive", status=200)
+