changes in dir

z2/myproject/Dockerfile

@@ -0,0 +1,28 @@
+# Use an official Python runtime as a parent image
+FROM python:3.9-slim
+
+# Set environment variables
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+
+# Set the working directory in the container
+WORKDIR /app
+
+# Copy the requirements file into the container
+COPY requirements.txt .
+
+# Install dependencies
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy the current directory contents into the container
+COPY . .
+
+# Copy wait-for-it script and make it executable
+COPY wait-for-it.sh /wait-for-it.sh
+RUN chmod +x /wait-for-it.sh
+
+# Expose port 8000 for the Django app
+EXPOSE 8000
+
+# Run the Django development server, wait for the DB to be ready first
+CMD ["/wait-for-it.sh", "db:5432", "--", "python", "manage.py", "runserver", "0.0.0.0:8000"]

z2/myproject/README.md

@@ -0,0 +1,102 @@
+Application Overview
+This web application is a basic Django project connected to a PostgreSQL database.
+
+Django web service: Runs a Django development server.
+PostgreSQL database service: Stores data for the Django application.
+The services are configured to communicate with each other over a custom virtual network, and the database data is persisted in a named volume.
+
+Project Structure
+The repository contains the following key files:
+
+docker-compose.yml: Defines the services (Django and PostgreSQL) and configurations.
+Dockerfile: Defines the configuration for building the Django web service.
+wait-for-it.sh: A script that ensures the Django app waits for PostgreSQL to be ready before starting.
+requirements.txt: Python dependencies for the Django application.
+manage.py: The Django project’s command-line utility.
+prepare-app.sh: Script to prepare the application environment (build images, create volumes, and networks).
+start-app.sh: Script to start the application (launch containers and configure them to restart on failure).
+stop-app.sh: Script to stop the containers (pause the application without resetting the state).
+remove-app.sh: Script to remove all traces of the application (cleanup).
+Virtual Networks and Named Volumes
+Network: mic_default_san
+Custom network for communication between the services.
+Volume: postgres_data
+A named volume used to persist PostgreSQL data so that data is not lost if the container is stopped or removed.
+Container Configuration
+PostgreSQL Service
+Image: postgres:13
+Environment variables:
+POSTGRES_DB: Database name (mydatabase)
+POSTGRES_USER: Database user (myuser)
+POSTGRES_PASSWORD: Database password (mypassword)
+Ports: Exposes PostgreSQL on localhost:5432
+Volume: Persists data in the postgres_data volume.
+Django Web Service
+Build Context: The Dockerfile is used to build the web service container.
+Command: Waits for PostgreSQL to be available before starting the Django development server.
+Ports: Exposes the Django app on localhost:8000
+Environment Variables:
+DATABASE_URL: Connection string for the database.
+Instructions for Running the Application
+Step 1: Prepare the Application
+Run the prepare-app.sh script to build the Docker images, create named volumes, and set up networks.
+
+bash
+Copy
+Edit
+./prepare-app.sh
+Step 2: Start the Application
+Run the start-app.sh script to start the application. This will launch the containers, and you can access the web application in your browser.
+
+bash
+Copy
+Edit
+./start-app.sh
+After running the script, you will see the following message:
+
+arduino
+Copy
+Edit
+The app is available at http://localhost:8000
+Step 3: Open the Web Application
+Open a browser and navigate to http://localhost:8000 to view the Django application.
+Step 4: Stop the Application
+To stop the application without removing containers and volumes, use the stop-app.sh script. This will pause the services but retain the current state.
+
+bash
+Copy
+Edit
+./stop-app.sh
+Step 5: Remove the Application
+If you want to completely remove all containers, networks, and volumes created by the application, use the remove-app.sh script.
+
+bash
+Copy
+Edit
+./remove-app.sh
+After running the script, everything related to the application will be removed.
+
+Example Workflow
+Here’s an example of working with the application:
+
+bash
+Copy
+Edit
+# Prepare the application
+./prepare-app.sh
+Preparing app ...
+
+# Run the application
+./start-app.sh
+Running app ...
+The app is available at http://localhost:8000
+
+# Open the web application in a browser.
+
+# Stop the application
+./stop-app.sh
+Stopping app ...
+
+# Remove the application
+./remove-app.sh
+Removed app.

z2/myproject/docker-compose.yml

@@ -0,0 +1,35 @@
+version: '3.8'
+
+services:
+  db:
+    image: postgres:13
+    environment:
+      POSTGRES_DB: mydatabase
+      POSTGRES_USER: myuser
+      POSTGRES_PASSWORD: mypassword
+    volumes:
+      - postgres_data:/var/lib/postgresql/data/
+    ports:
+      - "5432:5432"
+    networks:
+      - mic_default_san
+
+  web:
+    build: .
+    command: /wait-for-it.sh db:5432 -- python manage.py runserver 0.0.0.0:8000
+    volumes:
+      - .:/app
+    ports:
+      - "8000:8000"
+    depends_on:
+      - db
+    environment:
+      DATABASE_URL: postgres://myuser:mypassword@db:5432/mydatabase
+    networks:
+      mic_default_san:
+
+volumes:
+  postgres_data:
+
+networks:
+  mic_default_san:

z2/myproject/k8s/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: django-app
+  namespace: webapp-namespace
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: django
+  template:
+    metadata:
+      labels:
+        app: django
+    spec:
+      containers:
+      - name: django
+        image: django-app:latest
+        imagePullPolicy: Never
+        ports:
+        - containerPort: 8000
+        env:
+        - name: POSTGRES_HOST
+          value: postgres
+        - name: POSTGRES_DB
+          value: mydatabase
+        - name: POSTGRES_USER
+          value: myuser
+        - name: POSTGRES_PASSWORD
+          value: mypassword
+        - name: POSTGRES_PORT
+          value: "5432"
+        - name: DJANGO_DEBUG
+          value: "False"
+        - name: DJANGO_ALLOWED_HOSTS
+          value: "*"

z2/myproject/k8s/django-deployment.yaml

@@ -0,0 +1,35 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: django-app
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: django
+  template:
+    metadata:
+      labels:
+        app: django
+    spec:
+      containers:
+      - name: django
+        image: django-app:latest
+        imagePullPolicy: Never
+        ports:
+        - containerPort: 8000
+        env:
+        - name: POSTGRES_HOST
+          value: postgres
+        - name: POSTGRES_DB
+          value: mydatabase
+        - name: POSTGRES_USER
+          value: myuser
+        - name: POSTGRES_PASSWORD
+          value: mypassword
+        - name: POSTGRES_PORT
+          value: "5432"
+        - name: DJANGO_DEBUG
+          value: "False"
+        - name: DJANGO_ALLOWED_HOSTS
+          value: "*"

z2/myproject/k8s/migrate-job.yaml

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+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: django-migrate
+  namespace: webapp-namespace
+spec:
+  template:
+    spec:
+      containers:
+      - name: migrate
+        image: django-app:latest
+        imagePullPolicy: Never
+        command: ["python", "manage.py", "migrate"]
+        env:
+        - name: POSTGRES_HOST
+          value: postgres
+        - name: POSTGRES_DB
+          value: mydatabase
+        - name: POSTGRES_USER
+          value: myuser
+        - name: POSTGRES_PASSWORD
+          value: mypassword
+        - name: POSTGRES_PORT
+          value: "5432"
+      restartPolicy: OnFailure
+  backoffLimit: 1

z2/myproject/k8s/namespace.yaml

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+apiVersion: v1
+kind: Namespace
+metadata:
+  name: webapp-namespace

z2/myproject/k8s/postgres-deployment.yaml

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+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: postgres-pvc
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 1Gi
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: postgres
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: postgres
+  template:
+    metadata:
+      labels:
+        app: postgres
+    spec:
+      containers:
+      - name: postgres
+        image: postgres:13
+        env:
+        - name: POSTGRES_DB
+          value: mydatabase
+        - name: POSTGRES_USER
+          value: myuser
+        - name: POSTGRES_PASSWORD
+          value: mypassword
+        ports:
+        - containerPort: 5432
+        volumeMounts:
+        - name: postgres-storage
+          mountPath: /var/lib/postgresql/data
+      volumes:
+      - name: postgres-storage
+        persistentVolumeClaim:
+          claimName: postgres-pvc
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: postgres
+spec:
+  selector:
+    app: postgres
+  ports:
+  - port: 5432

z2/myproject/k8s/service.yaml

@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: django-service
+  namespace: webapp-namespace
+spec:
+  selector:
+    app: django
+  type: NodePort
+  ports:
+  - port: 8000
+    targetPort: 8000
+    nodePort: 30002

z2/myproject/k8s/statefulset.yaml

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+apiVersion: v1
+kind: PersistentVolume
+metadata:
+  name: postgres-pv
+  namespace: webapp-namespace
+spec:
+  capacity:
+    storage: 1Gi
+  accessModes:
+    - ReadWriteOnce
+  hostPath:
+    path: "/mnt/data/postgres"
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: postgres-pvc
+  namespace: webapp-namespace
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 1Gi
+---
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: postgres
+  namespace: webapp-namespace
+spec:
+  serviceName: "postgres"
+  replicas: 1
+  selector:
+    matchLabels:
+      app: postgres
+  template:
+    metadata:
+      labels:
+        app: postgres
+    spec:
+      containers:
+      - name: postgres
+        image: postgres:13
+        env:
+        - name: POSTGRES_DB
+          value: mydatabase
+        - name: POSTGRES_USER
+          value: myuser
+        - name: POSTGRES_PASSWORD
+          value: mypassword
+        ports:
+        - containerPort: 5432
+        volumeMounts:
+        - name: postgres-storage
+          mountPath: /var/lib/postgresql/data
+      volumes:
+      - name: postgres-storage
+        persistentVolumeClaim:
+          claimName: postgres-pvc
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: postgres
+  namespace: webapp-namespace
+spec:
+  selector:
+    app: postgres
+  ports:
+  - port: 5432

z2/myproject/manage.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python
+"""Django's command-line utility for administrative tasks."""
+import os
+import sys
+
+
+def main():
+    """Run administrative tasks."""
+    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'myproject.settings')
+    try:
+        from django.core.management import execute_from_command_line
+    except ImportError as exc:
+        raise ImportError(
+            "Couldn't import Django. Are you sure it's installed and "
+            "available on your PYTHONPATH environment variable? Did you "
+            "forget to activate a virtual environment?"
+        ) from exc
+    execute_from_command_line(sys.argv)
+
+
+if __name__ == '__main__':
+    main()

z2/myproject/myapp/admin.py

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+from django.contrib import admin
+
+# Register your models here.

z2/myproject/myapp/apps.py

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+from django.apps import AppConfig
+
+
+class MyappConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'myapp'

z2/myproject/myapp/forms.py

@@ -0,0 +1,7 @@
+from django import forms
+from .models import Student
+
+class StudentForm(forms.ModelForm):
+    class Meta:
+        model = Student
+        fields = ['name', 'age', 'university', 'degree']

z2/myproject/myapp/migrations/0001_initial.py

@@ -0,0 +1,24 @@
+# Generated by Django 4.2.19 on 2025-02-19 10:29
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Student',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=100)),
+                ('age', models.IntegerField()),
+                ('university', models.CharField(max_length=100)),
+                ('degree', models.CharField(max_length=100)),
+            ],
+        ),
+    ]

z2/myproject/myapp/models.py

@@ -0,0 +1,10 @@
+from django.db import models
+
+class Student(models.Model):
+    name = models.CharField(max_length=100)
+    age = models.IntegerField()
+    university = models.CharField(max_length=100)
+    degree = models.CharField(max_length=100)
+
+    def __str__(self):
+        return self.name

z2/myproject/myapp/static/styles.css

@@ -0,0 +1,27 @@
+body {
+    font-family: Arial, sans-serif;
+    margin: 20px;
+}
+
+form {
+    max-width: 400px;
+    margin: 0 auto;
+}
+
+input, button {
+    width: 100%;
+    padding: 10px;
+    margin: 10px 0;
+}
+
+ul {
+    list-style-type: none;
+    padding: 0;
+}
+
+li {
+    background: #f9f9f9;
+    padding: 10px;
+    margin: 5px 0;
+    border: 1px solid #ddd;
+}

z2/myproject/myapp/templates/student_form.html

@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Student Form</title>
+
+</head>
+<body>
+    <h1>Student Information Form</h1>
+    <form method="post">
+        {% csrf_token %}
+        {{ form.as_p }}
+        <button type="submit">Submit</button>
+    </form>
+    <br>
+    <a href="{% url 'student_list' %}">View All Students</a>
+</body>
+</html>

z2/myproject/myapp/templates/student_list.html

@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Student List</title>
+</head>
+<body>
+    <h1>Student List</h1>
+    <ul>
+        {% for student in students %}
+            <li>{{ student.name }} - {{ student.age }} years old, studying {{ student.degree }} at {{ student.university }}</li>
+        {% endfor %}
+    </ul>
+    <br>
+    <a href="{% url 'student_form' %}">Add New Student</a>
+</body>
+</html>

z2/myproject/myapp/tests.py

@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.

z2/myproject/myapp/urls.py

@@ -0,0 +1,7 @@
+from django.urls import path
+from . import views
+
+urlpatterns = [
+    path('', views.student_form, name='student_form'),
+    path('list/', views.student_list, name='student_list'),
+]

z2/myproject/myapp/views.py

@@ -0,0 +1,17 @@
+from django.shortcuts import render, redirect
+from .forms import StudentForm
+from .models import Student
+
+def student_form(request):
+    if request.method == 'POST':
+        form = StudentForm(request.POST)
+        if form.is_valid():
+            form.save()
+            return redirect('student_list')  # Redirect to a list view after submission
+    else:
+        form = StudentForm()
+    return render(request, 'student_form.html', {'form': form})
+
+def student_list(request):
+    students = Student.objects.all()
+    return render(request, 'student_list.html', {'students': students})

z2/myproject/myproject/asgi.py

@@ -0,0 +1,16 @@
+"""
+ASGI config for myproject project.
+
+It exposes the ASGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/5.1/howto/deployment/asgi/
+"""
+
+import os
+
+from django.core.asgi import get_asgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'myproject.settings')
+
+application = get_asgi_application()

z2/myproject/myproject/settings.py

@@ -0,0 +1,138 @@
+"""
+Django settings for myproject project.
+
+Generated by 'django-admin startproject' using Django 5.1.6.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/5.1/topics/settings/
+
+For the full list of settings and their values, see
+https://docs.djangoproject.com/en/5.1/ref/settings/
+"""
+
+from pathlib import Path
+import os
+# Build paths inside the project like this: BASE_DIR / 'subdir'.
+BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/5.1/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = 'django-insecure-y_$e4bt^whhd+8^-9nuvdmes6$g!2(d4g3keok%c&yowtq0abz'
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = True
+
+ALLOWED_HOSTS = ['*']
+
+# Application definition
+
+INSTALLED_APPS = [
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+    'myapp',
+]
+
+MIDDLEWARE = [
+    'django.middleware.security.SecurityMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+]
+
+ROOT_URLCONF = 'myproject.urls'
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [os.path.join(BASE_DIR, 'myapp/templates')],
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.debug',
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = 'myproject.wsgi.application'
+
+
+# Database
+# https://docs.djangoproject.com/en/5.1/ref/settings/#databases
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.postgresql',
+        'NAME': os.getenv('POSTGRES_DB', 'mydatabase'),
+        'USER': os.getenv('POSTGRES_USER', 'myuser'),
+        'PASSWORD': os.getenv('POSTGRES_PASSWORD', 'mypassword'),
+        'HOST': os.getenv('POSTGRES_HOST', 'postgres'),  # Changed from 'db' to 'postgres' to match k8s service name
+        'PORT': os.getenv('POSTGRES_PORT', '5432'),
+    }
+}
+# Password validation
+# https://docs.djangoproject.com/en/5.1/ref/settings/#auth-password-validators
+
+AUTH_PASSWORD_VALIDATORS = [
+    {
+        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
+    },
+]
+
+
+# Internationalization
+# https://docs.djangoproject.com/en/5.1/topics/i18n/
+
+LANGUAGE_CODE = 'en-us'
+
+TIME_ZONE = 'UTC'
+
+USE_I18N = True
+
+USE_TZ = True
+
+
+# Static files (CSS, JavaScript, Images)
+# https://docs.djangoproject.com/en/5.1/howto/static-files/
+
+STATIC_URL = 'static/'
+
+# Default primary key field type
+# https://docs.djangoproject.com/en/5.1/ref/settings/#default-auto-field
+
+DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
+
+
+
+# Static files (CSS, JavaScript, Images)
+STATIC_URL = '/static/'
+LANGUAGE_CODE = 'en-us'
+TIME_ZONE = 'UTC'
+USE_I18N = True
+USE_L10N = True
+USE_TZ = True
+
+STATICFILES_DIRS = [os.path.join(BASE_DIR, 'myapp/static')]  # Path to your static files
+
+

z2/myproject/myproject/urls.py

@@ -0,0 +1,23 @@
+"""
+URL configuration for myproject project.
+
+The `urlpatterns` list routes URLs to views. For more information please see:
+    https://docs.djangoproject.com/en/5.1/topics/http/urls/
+Examples:
+Function views
+    1. Add an import:  from my_app import views
+    2. Add a URL to urlpatterns:  path('', views.home, name='home')
+Class-based views
+    1. Add an import:  from other_app.views import Home
+    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
+Including another URLconf
+    1. Import the include() function: from django.urls import include, path
+    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
+"""
+from django.contrib import admin
+from django.urls import path, include
+
+urlpatterns = [
+    path('admin/', admin.site.urls),
+    path('', include('myapp.urls')),
+]

z2/myproject/myproject/wsgi.py

@@ -0,0 +1,16 @@
+"""
+WSGI config for myproject project.
+
+It exposes the WSGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/5.1/howto/deployment/wsgi/
+"""
+
+import os
+
+from django.core.wsgi import get_wsgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'myproject.settings')
+
+application = get_wsgi_application()

z2/myproject/prepare-app.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+# Build the Django application Docker image
+echo "Building Django application image..."
+docker build -t django-app:latest .
+
+# Create a local directory for PostgreSQL data
+mkdir -p /mnt/data/postgres
+
+echo "Application preparation complete."

z2/myproject/remove-app.sh

@@ -0,0 +1,16 @@
+# remove-app.sh
+#!/bin/bash
+
+set -e  # Exit on any error
+
+echo "Removing app..."
+
+# Stop and remove containers, networks, volumes
+docker-compose down -v
+
+# Remove Docker image
+docker rmi myproject-web || true  # Ignore errors if image doesn't exist
+
+# Remove named volume and network
+
+echo "Application removed."

z2/myproject/requirements.txt

@@ -0,0 +1,3 @@
+Django
+gunicorn
+psycopg2-binary

z2/myproject/scripts/prepare-app.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+# Build Docker image
+docker build -t django-app .
+
+# Create data directory for PV
+sudo mkdir -p /mnt/data
+sudo chmod 777 /mnt/data
+
+# Start Minikube if not running
+minikube status || minikube start

z2/myproject/scripts/start-app.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+# Create namespace
+kubectl apply -f k8s/namespace.yaml
+
+# Create PV and PVC
+kubectl apply -f k8s/pv-pvc.yaml
+
+# Create StatefulSet
+kubectl apply -f k8s/statefulset.yaml
+
+# Create Deployment
+kubectl apply -f k8s/deployment.yaml
+
+# Create Service
+kubectl apply -f k8s/service.yaml
+
+# Wait for pods to be ready
+kubectl wait --for=condition=Ready pod -l app=django --namespace django-namespace --timeout=120s
+
+# Perform migrations
+kubectl exec -it $(kubectl get pods -n django-namespace -l app=django -o jsonpath='{.items[0].metadata.name}') -n django-namespace -- python manage.py migrate
+
+# Get service URL
+minikube service django-service --url -n django-namespace

z2/myproject/scripts/stop-app.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+# Delete all resources in the namespace
+kubectl delete namespace django-namespace
+
+# Delete PV (not namespaced)
+kubectl delete pv postgres-pv

z2/myproject/start-app.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+# Apply the namespace
+kubectl apply -f k8s/namespace.yaml
+
+# Apply the StatefulSet and related objects
+kubectl apply -f k8s/statefulset.yaml
+
+# Apply the Django Deployment
+kubectl apply -f k8s/deployment.yaml
+
+# Apply the Django Service
+kubectl apply -f k8s/service.yaml
+
+echo "All Kubernetes objects created successfully."

z2/myproject/stat.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+# Apply the namespace
+kubectl apply -f k8s/namespace.yaml
+
+# Apply the StatefulSet and related objects
+kubectl apply -f k8s/statefulset.yaml
+
+# Apply the Django Deployment
+kubectl apply -f k8s/deployment.yaml
+
+# Apply the Django Service
+kubectl apply -f k8s/service.yaml
+
+# Wait for the PostgreSQL pod to be ready
+echo "Waiting for PostgreSQL to be ready..."
+kubectl wait --for=condition=Ready pod -l app=postgres -n webapp-namespace --timeout=120s
+
+# Apply migrations using a Kubernetes Job
+echo "Applying migrations..."
+kubectl apply -f k8s/migrate-job.yaml
+
+# Wait for the migration job to complete
+kubectl wait --for=condition=Complete job/django-migrate -n webapp-namespace --timeout=120s
+
+echo "All Kubernetes objects created successfully."

z2/myproject/stop-app.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+# Delete the Django Service
+kubectl delete -f k8s/service.yaml
+
+# Delete the Django Deployment
+kubectl delete -f k8s/deployment.yaml
+
+# Delete the StatefulSet and related objects
+kubectl delete -f k8s/statefulset.yaml
+
+# Delete the namespace
+kubectl delete -f k8s/namespace.yaml
+
+echo "All Kubernetes objects deleted successfully."

z2/myproject/wait-for-it.sh

@@ -0,0 +1,182 @@
+#!/usr/bin/env bash
+# Use this script to test if a given TCP host/port are available
+
+WAITFORIT_cmdname=${0##*/}
+
+echoerr() { if [[ $WAITFORIT_QUIET -ne 1 ]]; then echo "$@" 1>&2; fi }
+
+usage()
+{
+    cat << USAGE >&2
+Usage:
+    $WAITFORIT_cmdname host:port [-s] [-t timeout] [-- command args]
+    -h HOST | --host=HOST       Host or IP under test
+    -p PORT | --port=PORT       TCP port under test
+                                Alternatively, you specify the host and port as host:port
+    -s | --strict               Only execute subcommand if the test succeeds
+    -q | --quiet                Don't output any status messages
+    -t TIMEOUT | --timeout=TIMEOUT
+                                Timeout in seconds, zero for no timeout
+    -- COMMAND ARGS             Execute command with args after the test finishes
+USAGE
+    exit 1
+}
+
+wait_for()
+{
+    if [[ $WAITFORIT_TIMEOUT -gt 0 ]]; then
+        echoerr "$WAITFORIT_cmdname: waiting $WAITFORIT_TIMEOUT seconds for $WAITFORIT_HOST:$WAITFORIT_PORT"
+    else
+        echoerr "$WAITFORIT_cmdname: waiting for $WAITFORIT_HOST:$WAITFORIT_PORT without a timeout"
+    fi
+    WAITFORIT_start_ts=$(date +%s)
+    while :
+    do
+        if [[ $WAITFORIT_ISBUSY -eq 1 ]]; then
+            nc -z $WAITFORIT_HOST $WAITFORIT_PORT
+            WAITFORIT_result=$?
+        else
+            (echo -n > /dev/tcp/$WAITFORIT_HOST/$WAITFORIT_PORT) >/dev/null 2>&1
+            WAITFORIT_result=$?
+        fi
+        if [[ $WAITFORIT_result -eq 0 ]]; then
+            WAITFORIT_end_ts=$(date +%s)
+            echoerr "$WAITFORIT_cmdname: $WAITFORIT_HOST:$WAITFORIT_PORT is available after $((WAITFORIT_end_ts - WAITFORIT_start_ts)) seconds"
+            break
+        fi
+        sleep 1
+    done
+    return $WAITFORIT_result
+}
+
+wait_for_wrapper()
+{
+    # In order to support SIGINT during timeout: http://unix.stackexchange.com/a/57692
+    if [[ $WAITFORIT_QUIET -eq 1 ]]; then
+        timeout $WAITFORIT_BUSYTIMEFLAG $WAITFORIT_TIMEOUT $0 --quiet --child --host=$WAITFORIT_HOST --port=$WAITFORIT_PORT --timeout=$WAITFORIT_TIMEOUT &
+    else
+        timeout $WAITFORIT_BUSYTIMEFLAG $WAITFORIT_TIMEOUT $0 --child --host=$WAITFORIT_HOST --port=$WAITFORIT_PORT --timeout=$WAITFORIT_TIMEOUT &
+    fi
+    WAITFORIT_PID=$!
+    trap "kill -INT -$WAITFORIT_PID" INT
+    wait $WAITFORIT_PID
+    WAITFORIT_RESULT=$?
+    if [[ $WAITFORIT_RESULT -ne 0 ]]; then
+        echoerr "$WAITFORIT_cmdname: timeout occurred after waiting $WAITFORIT_TIMEOUT seconds for $WAITFORIT_HOST:$WAITFORIT_PORT"
+    fi
+    return $WAITFORIT_RESULT
+}
+
+# process arguments
+while [[ $# -gt 0 ]]
+do
+    case "$1" in
+        *:* )
+        WAITFORIT_hostport=(${1//:/ })
+        WAITFORIT_HOST=${WAITFORIT_hostport[0]}
+        WAITFORIT_PORT=${WAITFORIT_hostport[1]}
+        shift 1
+        ;;
+        --child)
+        WAITFORIT_CHILD=1
+        shift 1
+        ;;
+        -q | --quiet)
+        WAITFORIT_QUIET=1
+        shift 1
+        ;;
+        -s | --strict)
+        WAITFORIT_STRICT=1
+        shift 1
+        ;;
+        -h)
+        WAITFORIT_HOST="$2"
+        if [[ $WAITFORIT_HOST == "" ]]; then break; fi
+        shift 2
+        ;;
+        --host=*)
+        WAITFORIT_HOST="${1#*=}"
+        shift 1
+        ;;
+        -p)
+        WAITFORIT_PORT="$2"
+        if [[ $WAITFORIT_PORT == "" ]]; then break; fi
+        shift 2
+        ;;
+        --port=*)
+        WAITFORIT_PORT="${1#*=}"
+        shift 1
+        ;;
+        -t)
+        WAITFORIT_TIMEOUT="$2"
+        if [[ $WAITFORIT_TIMEOUT == "" ]]; then break; fi
+        shift 2
+        ;;
+        --timeout=*)
+        WAITFORIT_TIMEOUT="${1#*=}"
+        shift 1
+        ;;
+        --)
+        shift
+        WAITFORIT_CLI=("$@")
+        break
+        ;;
+        --help)
+        usage
+        ;;
+        *)
+        echoerr "Unknown argument: $1"
+        usage
+        ;;
+    esac
+done
+
+if [[ "$WAITFORIT_HOST" == "" || "$WAITFORIT_PORT" == "" ]]; then
+    echoerr "Error: you need to provide a host and port to test."
+    usage
+fi
+
+WAITFORIT_TIMEOUT=${WAITFORIT_TIMEOUT:-15}
+WAITFORIT_STRICT=${WAITFORIT_STRICT:-0}
+WAITFORIT_CHILD=${WAITFORIT_CHILD:-0}
+WAITFORIT_QUIET=${WAITFORIT_QUIET:-0}
+
+# Check to see if timeout is from busybox?
+WAITFORIT_TIMEOUT_PATH=$(type -p timeout)
+WAITFORIT_TIMEOUT_PATH=$(realpath $WAITFORIT_TIMEOUT_PATH 2>/dev/null || readlink -f $WAITFORIT_TIMEOUT_PATH)
+
+WAITFORIT_BUSYTIMEFLAG=""
+if [[ $WAITFORIT_TIMEOUT_PATH =~ "busybox" ]]; then
+    WAITFORIT_ISBUSY=1
+    # Check if busybox timeout uses -t flag
+    # (recent Alpine versions don't support -t anymore)
+    if timeout &>/dev/stdout | grep -q -e '-t '; then
+        WAITFORIT_BUSYTIMEFLAG="-t"
+    fi
+else
+    WAITFORIT_ISBUSY=0
+fi
+
+if [[ $WAITFORIT_CHILD -gt 0 ]]; then
+    wait_for
+    WAITFORIT_RESULT=$?
+    exit $WAITFORIT_RESULT
+else
+    if [[ $WAITFORIT_TIMEOUT -gt 0 ]]; then
+        wait_for_wrapper
+        WAITFORIT_RESULT=$?
+    else
+        wait_for
+        WAITFORIT_RESULT=$?
+    fi
+fi
+
+if [[ $WAITFORIT_CLI != "" ]]; then
+    if [[ $WAITFORIT_RESULT -ne 0 && $WAITFORIT_STRICT -eq 1 ]]; then
+        echoerr "$WAITFORIT_cmdname: strict mode, refusing to execute subprocess"
+        exit $WAITFORIT_RESULT
+    fi
+    exec "${WAITFORIT_CLI[@]}"
+else
+    exit $WAITFORIT_RESULT
+fi