Docker GUI Task26

This article describe how we can launch GUI software on Docker.

Task Description

*GUI container* on the *Docker*

• Launch a container on docker in?GUI mode?.
• Run any GUI software (Firefox) on the container.

Lets begin...?

Step 1:- Create a dockerGui folder and in this folder create a file name as Dockerfile.

Step 2:- Below is the Dockerfile code to create a docker image which should have firefox installed.

FROM centos
RUN yum install firefox -y
CMD ["usr/bin/firefox"]        

Step 3:- Now?build?this Dockerfile to create a image using docker build command.

• docker build -t .?<name>:<tag>

Now?image successfully created.?Just for cross verify can use below command.

• docker images | grep?firefox

Step 4:- Running Firefox container in GUI mode

• We know that if we start firefox container directly then it may show errors like below.

• It clearly shows that if we want to run docker container of firefox then we need to pass?"DISPLAY"?as a?environment variable.?For passing the environment variable just check the help from below command.

       docker container run --help        

• If you pass environment variable but again it might give errors like below

• To resolve this above issue we need to pass one more option called?--net=host?because?--net=host?option is?used?to make the programs inside the Docker container look like they are running on the?host?itself, from the perspective of the network.?It?allows the container greater network access than?it?can normally get.

docker run -it --net=host --env="DISPLAY" firefox:<tag>        

So finally if you run above command. Application?( Firefox?) will launch inside docker container.

It will automatically start the firefox.

Thank