Lab 22:Pushing a docker image to docker hub

                                                      Pushing a docker image to docker hub

First you need to have an account in docker hub.

Create an account in docker hub.

https://hub.docker.com/

Create an instance in aws console (refer how to create an instance)

Login to gitbash(refer how to login to an instance  in ssh client)

Install docker in an instance

Check the service is running or not.

Switch to root user----------------->sudo su

To install docker------------------->yum install docker

To start the service--------------->systemctl start docker

To check whether the service is running or not ---------------->ps-ef | grep -i docker

Now start the service

Now the server is running or not

Now install nodejs application inside the docker and push the image to docker hub.

First make a directory name as docker

Inside the directory install nodejs application

You can get nodejs from https://github.com/luksa/kubernetes-in-action/tree/master/chapter02/kubia

From that you can pull the image to your local.

Now get nodejs file.

Go to the link click on dockerfile,click on raw copy the url.

Click on raw you will get a page there copy the url

Go to the git bash and enter the command

#wget https://raw.githubusercontent.com/luksa/kubernetes-in-action/master/chapter02/kubia/Dockerfile

Now click on app.js file copy the file and install in git bash

Make sure that you should have the both files in your docker folder

Now build the image

#docker build -t nodejs.

Now check whether image is build are not

Use the command ;docker images

Now run the container---------------->docker run -d -p<ports><imagename>

docker run -d -p 8080:8080 nodejs

Now check whether container running or not:-------------------------->docker ps

Now check in the browser by giving Ip addresss

ipaddress:<hostport>

Its working..

Now push this image to docker hub.

Login to the docker hub account

Create a repository

Tag this image and push to docker hub.

Click on create repository 

Copy the right side command and paste in any wordpad

We will use those while tagging the images and pushing the image to docker hub.

Now give name to repository

Eg:nodejs

And Click on create

You will get the page like this

And copy the right side command .We will use this to push the image to docker hub.

Now go to gitbash login to the docker hub----------------->#docker login

Enter your docker id  and password

Now tag the image

#docker tag <image><dockerid>/repository name:latest

docker tag nodejs<username>/nodjs-web:1

Now push the image to the docker hub

docker push<username>/nodjs-web:1

Now go the  docker hub whether  the image is pushed or not

Execrise: 1)Build images of httpd,flask app,nodejs app and push them in docker hub

                2) Take an redhat ami install docker and build an images and try push the images to docker hub.