Debian 10 Docker Compose

2/13/2022by admin

Tutorial

Zoneminder Debian Repo. About Zoneminder Debian Repo. If you are not founding for Zoneminder Debian Repo, simply check out our article below. Using Docker Compose On Windows Images! Simple art pictures Download free images, photos, pictures, wallpaper and use it. Follow the steps covered in the next parts of this article to install and use Docker CE on Debian 10 (Buster). Step 1: Install Dependency packages Start the installation by ensuring that all the packages used by docker as dependencies are installed. Now that you have installed on your Debian 10, let’s go over the basic docker concepts. 这是我的docker-compose build结果. Docker-compose build Building sitedev Step 1: FROM debian:wheezy - 26f8900cfb86 Step 2: RUN echo 'hello world' - Using cache - d2 Step 3: RUN apt-get update - Running in 9b304362ffc8 E: Method http has died unexpectedly! E: Sub-process http received a segmentation fault.

Docker-compose Download

Jun 10, 2019 Docker Compose is a tool for defining and running multi-container Docker applications. It allows users to launch, execute, communicate, and close containers with a single coordinated command. This guide will show you how to install Docker Compose on Ubuntu.

Introduction

Docker is a great tool for automating the deployment of Linux applications inside software containers, but to take full advantage of its potential each component of an application should run in its own individual container. For complex applications with a lot of components, orchestrating all the containers to start up, communicate, and shut down together can quickly become unwieldy.

The Docker community came up with a popular solution called Fig, which allowed you to use a single YAML file to orchestrate all of your Docker containers and configurations. This became so popular that the Docker team decided to make Docker Compose based on the Fig source, which is now deprecated. Docker Compose lets users orchestrate the processes of Docker containers, including starting up, shutting down, and setting up intra-container linking and volumes.

In this tutorial, you’ll install the latest version of Docker Compose to help you manage multi-container applications on a Debian 10 server.

Prerequisites

To follow this article, you will need:

  • A Debian 10 server and a non-root user with sudo privileges. This initial server setup with Debian 10 tutorial explains how to set this up.
  • Docker installed with the instructions from Step 1 and Step 2 of How To Install and Use Docker on Debian 10

Note: Even though the Prerequisites give instructions for installing Docker on Debian 10, the docker commands in this article should work on other operating systems as long as Docker is installed.

Step 1 — Installing Docker Compose

Although you can install Docker Compose from the official Debian repositories, it is several minor versions behind the latest release, so in this tutorial you’ll install it from Docker’s GitHub repository. The command that follows is slightly different than the one you’ll find on the Releases page. By using the -o flag to specify the output file first rather than redirecting the output, this syntax avoids running into a “permission denied” error caused when using sudo.

Check the current release and, if necessary, update it in the command that follows:

Next we’ll set the permissions:

Then we’ll verify that the installation was successful by checking the version:

This will print out the version we installed:

Now that we have Docker Compose installed, we’re ready to run a “Hello World” example.

Step 2 — Running a Container with Docker Compose

The public Docker registry, Docker Hub, includes a Hello World image for demonstration and testing. It illustrates the minimal configuration required to run a container using Docker Compose: a YAML file that calls a single image. We’ll create this minimal configuration to run our hello-world container.

First, create a directory for the YAML file and switch to it:

Docker

Then create the YAML file:

Put the following contents into the file, save the file, and exit the text editor:

The first line in the YAML file is used as part of the container name. The second line specifies which image to use to create the container. When we run the docker-compose up command, it will look for a local image by the name we specified, hello-world. With this in place, we’ll save and exit the file.

You can look manually at images on our system with the docker images command:

When there are no local images at all, only the column headings display:

Now, while still in the ~/hello-world directory, execute the following command:

The first time you run the command, if there’s no local image named hello-world, Docker Compose will pull it from the Docker Hub public repository:

After pulling the image, docker-compose creates a container, attaches, and runs the hello program, which in turn confirms that the installation appears to be working:

Then it prints an explanation of what it did:

Docker containers only run as long as the command is active, so once hello finished running, the container stopped. Consequently, when we look at active processes, the column headers will appear, but the hello-world container won’t be listed because it’s not running:

You can see the container information, which you’ll need in the next step, by using the -a flag. This shows all containers, not just active ones:

ComposeDocker-compose

This displays the information you’ll need to remove the container when you’re done with it.

Step 3 — Removing the Image (Optional)

To avoid using unnecessary disk space, we’ll remove the local image. To do so, we’ll need to delete all the containers that reference the image using the docker rm command, followed by either the CONTAINER ID or the NAME. In the following example, we’re using the CONTAINER ID from the docker ps -a command we just ran. Be sure to substitute the ID of your container:

Once all containers that reference the image have been removed, we can remove the image:

Conclusion

You’ve installed Docker Compose on Debian 10, tested your installation by running a Hello World example, and removed the test image and container.

Install Docker Compose Debian 10

While the Hello World example confirmed your installation, this basic configuration does not show one of the main benefits of Docker Compose — being able to bring a group of Docker containers up and down all at the same time. To see how to use Docker Compose in more detail, take a look at How To Install WordPress With Docker Compose.

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