devops-1 dockerizing python app

.python-version

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+3.10.13

Dockerfile

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+FROM ubuntu:22.04
+
+RUN apt-get update && apt-get install -y python3 python3-pip && mkdir /app
+COPY requirements.txt /app/
+RUN pip3 install -r /app/requirements.txt
+WORKDIR /app
+COPY ./app /app
+
+CMD ["python3", "app.py"]

M1-3-Ansible/README.md

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+# M1-3-1 Configuration Management
+
+## Ansible Task
+Create an Ansible playbook that build, push and then run the Docker image for the Python application. Let your playbook has the following variables:
+
+- `image_name` - contains the name of your image without the tag, i.e. `vutoff/python-app`
+- `image_tag` - contains the tag you tagged your image with, i.e. `v0.2`
+- `listen_port` - contains the listening port you're binding your app to.
+
+Make sure that you set environment variable `PORT` when you define your container in the Ansible playbook that takes its value from `listen_port` variable.
+
+Use Ansible modules. Do not shell out.
+
+### Requirements
+- Make sure you have Python installed. Any version above 3.8 would suffice.
+- The `requirements.txt` file in this directory contains the required Ansible version. Run
+
+```sh
+pip install -r requirements.txt
+```
+
+- Make sure that Docker is running on your local machine.
+
+### Mind the following
+
+- If you're running Docker Desktop or Rancher Desktop, mind the location of the `docker.sock` file. The location of the socket file is
+  - Docker Desktop - `${HOME}/.docker/run/docker.sock`
+  - Rancher DEsktop - ${HOME}/.rd/run/docker.sock
+
+- If you're using one of the above, when you write your Ansible playbook you must specify the path to the docker socket with the parameter `docker_host`, i.e. `docker_host: "unix://{{ ansible_env.HOME }}/.rd/docker.sock"`.

M1-3-Ansible/requirements.txt

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+ansible==8.5.0
+ansible-core==2.15.5

app/app.py

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+import os
+
+from flask import Flask
+
+app = Flask(__name__)
+
+
+@app.route("/")
+def hello_world():
+    return "Hello, World!"
+
+
+if __name__ == "__main__":
+    app.run(port=os.environ.get("PORT", 5000), host="0.0.0.0")

app/app_test.py

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+import unittest
+
+from app import app
+
+
+class TestApp(unittest.TestCase):
+    def setUp(self):
+        self.client = app.test_client()
+
+    def test_hello_world(self):
+        response = self.client.get("/")
+        self.assertEqual(response.status_code, 200)
+        self.assertEqual(response.data, b"Hello, World!")
+
+
+if __name__ == "__main__":
+    unittest.main()

requirements.txt

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+blinker==1.6.3 ; python_version >= "3.10" and python_version < "4.0"
+click==8.1.7 ; python_version >= "3.10" and python_version < "4.0"
+colorama==0.4.6 ; python_version >= "3.10" and python_version < "4.0" and platform_system == "Windows"
+flask==3.0.0 ; python_version >= "3.10" and python_version < "4.0"
+itsdangerous==2.1.2 ; python_version >= "3.10" and python_version < "4.0"
+jinja2==3.1.2 ; python_version >= "3.10" and python_version < "4.0"
+markupsafe==2.1.3 ; python_version >= "3.10" and python_version < "4.0"
+werkzeug==3.0.0 ; python_version >= "3.10" and python_version < "4.0"