DevOps-Challenge

This challenge is divided into two parts:

Part-1: Programming

Create a simple REST API using your preferred programming language that does the following:

It responds to the URL like http://host-ip/ and returns: Hello World, I'm Omar
responds to the URL like http://host-ip/?n=x and returns n*n
It responds to the URL like http://host-ip/ip with the IP address of the client making the request and save that IP address on Postgres
It responds to the URL like http://host-ip/allips with all of the saved IP addresses after retrieving it from Postgres.
The app is served via a wsgi handler. Like uWSGI
The Application is Dockerized.

Part-2: Deployment

there are several options to deploy the app

Using Docker
Kubernetes deployment
On-premise deployment

Using Docker

in this option we will use sqlite database

Install Docker
Clone this repo

git clone https://github.com/omarelsheekh/DevOps-Challenge

Build the docker image

docker build -t <image name> DevOps-Challenge/app/

Run the docker image

docker run -e "db_type=sqlite" -dp 5000:5000 -p 9191:9191 <image name>

Kubernetes deployment

Install Docker on all machines
Install kubectl on machines you will run commands from
Setup a K8s cluster, you can pick one of these options
- create a new cluster using Rancher
- create a new cluster using minikube , make sure to enable the NGINX Ingress controller in minikube
```
minikube addons enable ingress
```

Install helm on machines have kubectl installed

curl https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 | bash

Clone this repo

git clone https://github.com/omarelsheekh/DevOps-Challenge

Build the docker image

docker build -t <image name> DevOps-Challenge/app/

move to helm-chart directory
```
cd DevOps-Challenge/helm-chart
```

Run the app helm chart

helm install --set app.image=<image name> app .

warning: if you running it on minikube you have to set affinity to ""

helm install --set app.affinity="" --set postgresql.affinity=""  --set app.image=<image name> myapp .

Verify the IP addresses is set to the ingress:

$ kubectl get ingress
NAME                CLASS    HOSTS   ADDRESS        PORTS   AGE
myapp-app-ingress   <none>   *       192.168.49.2   80      9m13s

Verify that the Ingress controller is directing traffic
```
$ curl 192.168.49.2/
Hello World, I\'m Omar
```

On-premise deployment

Using the automation tool (Terraform) prepare a FULLY provisioned environment.

This automation should:

Provision 3 nodes on Azure, On these 3 nodes deploy:
1. The API
2. DB Master (PostgreSQL)
3. DB Slave (PostgreSQL) and Setup master-slave (streaming replication) PostgreSQL between node 2 and 3.
Deploying the Dockerized API on the App node

Getting Started

Install Terraform
Install azure Cli
log in to your azure account
```
az login
```

Make Sure that your subscription is active

$ az account list

[
  {
    "cloudName": "AzureCloud",
    "homeTenantId": "f6****22-84be-48a6-b**c-c0*******1f1",
    "id": "b7*****1-475c-41a6-a**2-d********f1c",
    "isDefault": true,
    "managedByTenants": [],
    "name": "Azure for Students",
    "state": "Enabled",
    "tenantId": "f6****22-84be-48a6-b**c-c0*******1f1",
    "user": {
      "name": "[email protected]",
      "type": "user"
    }
  }
]

Install Ansible

Clone this repo

git clone https://github.com/omarelsheekh/DevOps-Challenge

Change your directory to the repo
```
cd DevOps-Challenge
```
Change default variables in variables.tf if you want

Start Building All Infra in One Command

./create-infra.sh

Destroy Infra Whenever you want

./destroy-infra.sh

omarelsheekh / devops-challenge Goto Github PK

devops-challenge's Introduction