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This article mainly introduces "how to load the application into the docker container". In the daily operation, I believe that many people have doubts about how to load the application into the docker container. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the question of "how to load the application into the docker container". Next, please follow the editor to study!

We can easily run most GUI programs in the docker container without errors. Docker containers can package different packages for deploying and extending network applications, databases and back-end services without having to rely on specific stacks or providers.

Let's take Firefox as an example to show the simple steps of how to run a GUI program in a Docker container.

1. Install Docker

Before you begin, make sure that Docker is installed on the linux host. The CentOS 7 host is running here, and we will run the yum manager and the following command to install Docker.

# yum install docker# systemctl restart docker.service

two。 Create Dockerfile

The Docker daemon is now running, ready to create its own Firefox Docker container. We are going to create a Dockerfile in which we enter the required configuration to create a working Firefox container.

In order to run the Docker image, we need to use the latest version of CentOS. To create a Docker image, you need to create a file called Dockerfile with a text editor.

# nano Dockerfile

Next, add the following line to Dockerfile and save it.

#! / bin/bashFROM centos:7RUN yum install-y firefox

# replace the following 0 with your own uid / gid

RUN export uid=0 gid=0RUN mkdir-p / home/developerRUN echo "developer:x:$ {uid}: ${gid}: Developer,:/home/developer:/bin/bash" > / etc/passwdRUN echo "developer:x:$ {uid}:" > / etc/groupRUN echo "developer ALL= (ALL) NOPASSWD: ALL" > / etc/sudoersRUN chmod 0440/etc/sudoersRUN chown ${uid}: ${gid}-R / home/developerUSER developerENV HOME / home/developerCMD / usr/bin/firefox Note: in the configuration of the fourth line Replace 0 with your own user and group id. We can get uid and gid in shell or terminal with the following command. # id $USER

3. Construct a Docker container

Next we will build a container based on the Dockerfile above. It installs the firefox browser and the packages it needs. The user permission is then set and made to work. The name of the mirror here is firefox, and you can name it according to your needs.

# docker build-- rm-t firefox

4. Run the Docker container

If all goes well, we can now run our GUI program, the Firefox browser, in the Docker container running the CentOS 7 image.

# docker run-ti-- rm-e DISPLAY=$DISPLAY-v / tmp/.X11-unix:/tmp/.X11-unix firefox

At this point, the study on "how to load an application into a docker container" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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