didactic-octo-memory

Simple devops project to strenghten the following tools

###Tools: Vagrant , Ansible, Docker, Docker Swarn.

Goals:

• Provide multiple linux servers using vagrant.
• Run a playbook that automates the configuration of the above servers
• Containerize an enterprise web application
• Convert the servers to docker swarm nodes and bring up the application on the swarm

Guide Ubuntu 20.04

Install vagrant

wget -O- https://apt.releases.hashicorp.com/gpg | gpg --dearmor | sudo tee /usr/share/keyrings/hashicorp-archive-keyring.gpg

echo "deb [signed-by=/usr/share/keyrings/hashicorp-archive-keyring.gpg] https://apt.releases.hashicorp.com $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/hashicorp.list

sudo apt update && sudo apt install vagrant

Install hypervysor providers(Oracle Virtual-Box)

Note: We could choose VMware, Docker, Hyper-V, Virtual-Box, or a custom Provider.

Start

vagrant up
vagrant ssh control

vm

Create ssh key and push out to servers

ssh vagrant@node1 #ssh should be installed by default
ssh-keygen
ssh-copy-id node1
ssh-copy-id node2
ssh-copy-id node3

# test ssh access
ssh vagrant@node2

Install ansible playbook

mkdir ansible
cd ansible
touch myhost
touch playbook1.yml
# download the content of these files from the website

vagrant ssh control
sudo apt update
sudo apt upgrade -y
sudo apt install ansible
cd /vagrant/ansible/
ansible nodes -i myhost -m command -a hostname # test

Run ansible playbook to install docker

ansible-playbook -i myhost -K playbook1.yml

test docker is installed on node2

ssh vagrant@node2
docker run hello-world

Run flask app using docker compose

# go back to root directory
mkdir docker
touch app.py && touch docker-compose.yml \
&& touch Dockerfile && touch requirements.txt
# download the content of these files from the website

vagrant ssh control
ssh vagrant@node2
cd /vagrant/docker/
docker-compose up

# open a new server in a new terminal and test port 5000
vagrant ssh control
curl node2:500

Container orchestration with docker swarn