Notes

This all was tested with MiniCube on

• macOS 10.14.4
• minikube v1.0.0
• helm client/server v2.13.1

Due to running all with default configuration the calc service is exposed to port 30000. Minicube has proxy interface listening to 192.168.99.100

curl http://192.168.99.100:30000/calc?vf=200\&vi=5\&t=123

I've added the separate operations.sh script that allows to automate the build, deploy and destroy process

Usage:
	./operations.sh (build|cleanup|stop-compose|start-compose|help)

Here is how it looks when installed

NAME:   devops-challenge
LAST DEPLOYED: Sun Apr 21 11:19:01 2019
NAMESPACE: default
STATUS: DEPLOYED

RESOURCES:
==> v1/Deployment
NAME               READY  UP-TO-DATE  AVAILABLE  AGE
acceleration-a     0/2    2           0          0s
acceleration-calc  0/2    2           0          0s
acceleration-dv    0/2    2           0          0s

==> v1/Pod(related)
NAME                                READY  STATUS             RESTARTS  AGE
acceleration-a-57d4f5478b-96z2w     0/1    Pending            0         0s
acceleration-a-57d4f5478b-sp4rs     0/1    ContainerCreating  0         0s
acceleration-calc-5788d7df5d-5gmpw  0/1    ContainerCreating  0         0s
acceleration-calc-5788d7df5d-lg7n2  0/1    Pending            0         0s
acceleration-dv-94c5bf7df-92zlg     0/1    ContainerCreating  0         0s
acceleration-dv-94c5bf7df-tk8nh     0/1    Pending            0         0s

==> v1/Service
NAME               TYPE       CLUSTER-IP     EXTERNAL-IP  PORT(S)         AGE
acceleration-a     ClusterIP  10.102.224.6   <none>       3002/TCP        0s
acceleration-calc  NodePort   10.111.121.35  <none>       3000:30000/TCP  0s
acceleration-dv    ClusterIP  10.99.24.13    <none>       3001/TCP        0s

Infrastructure Engineer (DevOps) Challenge

The context

This challenge addresses a web application with a microservice architecture to calculate the acceleration of an object.

The application

• The application contains 3 microservices
• Each microservice takes care of only one arithmetic operation
• The microservices take inputs from the URL query form and return the result in JSON format
• The microservices are not stable and can stop serving requests

Services:

• acceleration-dv calculates 𝚫v=vf-vi

curl http://127.0.0.1:3001/dv?vf=200&vi=5
{"dv":195}

• acceleration-a calculates a=𝚫v/t

curl http://127.0.0.1:3002/a?dv=200&t=5
{"a":40}

• acceleration-calc coordinates request to acceleration-dv and acceleration-a services

curl http://127.0.0.1:3000/calc?vf=200&vi=5&t=123
{"a":1.5853658536585367}

Task

• Using Helm, write the necessary Kubernetes deployment and service files that can be used to create the full application, running 2 instances of each microservice.
• Only /calc of acceleration-calc microservices can be available outside of the kubernetes cluster.
• Run the application on a kubernetes cluster like Minikube or Docker for Mac.
• Make sure the application is stable.

Environment Setup

• Microservices are written on Typescript and Node.js version 10.14.2
• You would need to setup yarn
• Run yarn install to setup all required components
• Run yarn build to build production ready code
• Run yarn dev to run a service in dev environment
• Run yarn start to run a service in production

Instructions

• Fork this repo
• The challenge is on!
• Create a pull request
• Please complete your working solution within 7 days of receiving this challenge, and be sure to notify us when it is ready for review.