DevOps

This is repository for the DevOps Engineering course in Innopolis University

Table of contents:

• What is in this repo?
• Python app
• Unit Tests
• Vagrant
• Ansible

What is in this repo?

• app_python folder contains python web app and necessary files for Docker
• app_python/app_files folder contains the app itself, which shows current datetime in Europe/Moscow timezone. This app uses Django framework. It keeps datetimes of all requests to / in logs/access.txt file, accessable via /visits endpoint.
• .github/workflows folder contains workflows for testing the app and publishing it to the docker hub
• vagrant folder contains Vagrantfile for managing VM, which works on both VirtualBox and Google Cloud Platform
• ansible folder contains playbooks and roles for provisioning the VM (installing docker and running image from dockerhub)
• monitoring folder contains stuff necessary for grafana/promtail/loki/prometheus stack
• k8s folder contains configs for kubernetes & helm, which also demonstrates work with charts, secrets, resource management, config maps, stateful sets, kube prometheus stack, and init containers

Python app

The simplest way is to use docker:
docker run -p 5000:5000 kezzyhko/devops

If you do not want to use docker for some reason, then clone the repo, install requirements.txt and run main.py:
git clone https://github.com/kezzyhko/devops.git
pip3 install -r ./devops/app_python/requirements.txt
python3 ./devops/app_python/app_files/main.py

By default, app is accessible on port 5000

Unit tests

The unit tests for this app are located at app_files/tests.py.
There are three tests, which test the datetime_view view, located in the app_files/views.py.

Vagrant

If you want to use it locally using VirtualBox, the following command will be enough:
vagrant up --provider=virtualbox

If you want to use it with Google Cloud, then you need to change constants in Vagrantfile, add necessary key files and then use the following command:
vagrant up --provider=google

Ansible

Ansible provisioning is automatically executed when using vagrant up <...>.
If you want to run it manually, use vagrant provision or configure ansible hosts and execute the playbook