Document for this devops test

Topics

Run the test
Provision Kubernetes Cluster
Creating Helm Charts
Create Single Executator File

Run the test

First you must clone this repository with the command below and change directory to it:

git clone https://github.com/PooriaShahi/devops-test.git
cd devops-test

Then make sure you have pip3 installed on your system. you can check that with the command below:

pip3 -V

If it's not installed on your system then do the below: Python installation

python -m pip3 install --upgrade pip

Ubuntu installation

sudo apt install python3-pip

MacOS installation

brew install pip3

Then make sure that you have a server with root user and you have a ssh-key based authentication with it.

For your domain, please change value of host in wart/values.yaml file.

Then run the command below:

bash constructor.sh

Enter you server's IP and go make some snack and some coffee until magic completely happen ;)

When magic ends, you can see 2 different url based on your domain that defined in the wart/values.yaml file. Copy the urls and see the results.

Provision Kubernetes Cluster

For this challenge i use kubespray as recommended and provision a single node (CP+Worker) k8s cluster. I using Flannel CNI plugin for overlay k8s network. First creating my variables with the command below:

cp -rfp ./kubespray/inventory/sample ./kubespray/inventory/myCluster

then declare the ip of remote server and create hosts file for kubespray's ansible:

declare -a IPS=(<IP>)
CONFIG_FILE=kubespray/inventory/myCluster/hosts.yaml python3 kubespray/contrib/inventory_builder/inventory.py ${IPS[@]}

for using flannel network instead of calico, change kube_network_plugin field in the path below:

sed -i -e 's/calico/flannel/g' ./kubespray/inventory/myCluster/group_vars/k8s_cluster/k8s-cluster.yml

and then running the command below for provisioning the k8s cluster:

ansible-playbook -i inventory/myCluster/hosts.yaml -u root -b -v cluster.yml

Creating Helm Charts

Used the wart helm chart created by Pooria Shahi.

In this chart for every services, manifest written and we deploy the chart with the command below:

helm upgrade --install wp-app wart

Create Single Executator File

For this purpose we write 2 seprate ansible playbooks for initialize the server include update and upgrade the server and the main-course playbook for after provision cluster and using that for install ingress-nginx and initialize wordpress. All this will be done with a constructor.sh file which is a bash script file for implementing all together.