marait123 / GoViolin

Go deploy

GoViolin

GoViolin is a web app written in Go that helps with violin practice.

Currently hosted on Heroku at https://go-violin.herokuapp.com/

GoViolin allows practice over both 1 and 2 octaves.

Contains:

• Major Scales
• Harmonic and Melodic Minor scales
• Arpeggios
• A set of two part scale duet melodies by Franz Wohlfahrt

DEVOPS related files

|--- Dockerfile # this is the docker file of the app

|--- Jenkinsfile # the file used by jenkins to create the pipeline , the pipeline is actually on machine is polling scm every 1 minute

|-- example_out_jenkins_pass.txt --> this is the output of one successful build of jenkins pipeline

|--- deployemnt.yaml # the file that describes kubernetes deployment scaled to 3 pods

|--- service.yaml # the file that describes the kubernetes service 

how to run with docker

in the dockerfile i used multistage docker to reduce the final image size

• dockerhub-image-link

• remove the image docker rmi violin

• build the image docker build --tag violin .

• remove the old container docker rm violin_cont

• run the container docker run -d -p 8081:8081 --name violin_cont violin

• list the containers docker ps

• stop the violin container docker stop violin_cont

• push image to registry docker tag violin marait123/violin

  docker push marait123/violin

Jenkins part

• the jenkins file has a number of stages the most important are

  1. build stage to build the app and also the image
  2. testing stage to test the app
  3. push stage is where app is push to the registery
  4. deploy stage is left as placeholder but the deployment should go here but I did it alone as written in the requirement you can see it below in kubernetes section

• running of jenkins pipeline

• docker image on dockerhub after running of jenkins pipeline

common pipeline issues (solution)

• allow jenkins to use docker sudo usermod -a -G docker jenkins

kubernetes part

requirements

• minikube to create the cluster and its nodes
• vmware is needed to create the
• kubectl to interact with the kubernetes master

how to run the app in kubernetes

• run kubectl apply -f deployment.yaml to create the deployment
• run kubectl apply -f service.yaml to create the kubernetes service

notes

• in case you want to get the yaml files of

  • deployment --> kubectl get deployment violin-deploy -o yaml > deployment.yaml
  • service --> kubectl get service violin-deploy -o yaml > service.yaml

how to access the app

• firstly get the app ip
• type the ip you got in previous step in the browser and you should get