Install Docker Compose Digitalocean

When everything is setup all you need to do is to run the command docker-compose up -d inside the root folder to run the ghost blog. When docker is finished dowloading, the site will be available on the url localhost:2368. After following this guide you should have a functioning Ghost blog with HTTPS and DigitalOcean Spaces as the CDN. One simple way to do this is to add the -d option when you up your session: docker-compose up -d. Docker-compose will now fork to the background. To show your group of Docker containers (both stopped and currently running), use the following command: docker-compose ps -a. Git, Docker, and Docker Compose can be installed with the standard system tools. Here is an example for installation on Ubuntu 20.04: root apt-get install git docker docker-compose root systemctl enable docker. Please check the Git and the Docker documentation for instructions on further setup. Take A Sneak Peak At The Movies Coming Out This Week (8/12) Halloween Movies To Watch: Not Scary Edition; Halloween Movies To Watch: Scary Edition.

Tutorial

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

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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:

Then create the YAML file:

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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:

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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:

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

Step 3 — Removing the Image (Optional)

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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:

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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.

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.

Docker Compose is a great tool for development, testing, and staging environments, as well as CI workflows. Install Docker Compose on RHEL 8 / CentOS 8. Follow our separate guide on installation of latest Docker Compose on Linux. Install Docker Compose on Linux. For the sake of keeping this guide brief, we won’t dive into Docker compose usage. In order to install Prometheus on Docker, you will need to have sudo rights on your host. If you are not sure about it, run the following command $ sudo -v 1. Installing Docker on Ubuntu. Before installing Prometheus on Docker, it is important that Docker is already correctly installed and configured on your instance. Docker installed on your server, following Steps 1 and 2 of How To Install and Use Docker on Ubuntu 20.04. Docker Compose installed on your server, following Step 1 of How To Install and Use Docker Compose on Ubuntu 20.04. Step 1 — Obtaining the Demo Application. To get started, we’ll fetch the demo Laravel application from its Github.

Estimated reading time: 3 minutes

Docker Desktop for Mac is the Community version of Docker for Mac.You can download Docker Desktop for Mac from Docker Hub.

By downloading Docker Desktop, you agree to the terms of the Docker Software End User License Agreement and the Docker Data Processing Agreement.

System requirements

Install

Your Mac must meet the following requirements to successfully install Docker Desktop:

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  • macOS must be version 10.14 or newer. That is, Mojave, Catalina, or Big Sur. We recommend upgrading to the latest version of macOS.

    If you experience any issues after upgrading your macOS to version 10.15, you must install the latest version of Docker Desktop to be compatible with this version of macOS.

    Note

    Docker supports Docker Desktop on the most recent versions of macOS. That is, the current release of macOS and the previous two releases. As new major versions of macOS are made generally available, Docker stops supporting the oldest version and supports the newest version of macOS (in addition to the previous two releases). Docker Desktop currently supports macOS Mojave, macOS Catalina, and macOS Big Sur.

  • At least 4 GB of RAM.

  • VirtualBox prior to version 4.3.30 must not be installed as it is not compatible with Docker Desktop.

What’s included in the installer

The Docker Desktop installation includes Docker Engine, Docker CLI client, Docker Compose, Notary, Kubernetes, and Credential Helper.

Install and run Docker Desktop on Mac

  1. Double-click Docker.dmg to open the installer, then drag the Docker icon to the Applications folder.

  2. Double-click Docker.app in the Applications folder to start Docker. (In the example below, the Applications folder is in “grid” view mode.)

    The Docker menu in the top status bar indicates that Docker Desktop is running, and accessible from a terminal.

    If you’ve just installed the app, Docker Desktop launches the onboarding tutorial. The tutorial includes a simple exercise to build an example Docker image, run it as a container, push and save the image to Docker Hub.

  3. Click the Docker menu () to seePreferences and other options.

  4. Select About Docker to verify that you have the latest version.

Congratulations! You are now successfully running Docker Desktop.

If you would like to rerun the tutorial, go to the Docker Desktop menu and select Learn.

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Automatic updates

Starting with Docker Desktop 3.0.0, updates to Docker Desktop will be available automatically as delta updates from the previous version.

When an update is available, Docker Desktop automatically downloads it to your machine and displays an icon to indicate the availability of a newer version. All you need to do now is to click Update and restart from the Docker menu. This installs the latest update and restarts Docker Desktop for the changes to take effect.

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Uninstall Docker Desktop

To uninstall Docker Desktop from your Mac:

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  1. From the Docker menu, select Troubleshoot and then select Uninstall.
  2. Click Uninstall to confirm your selection.

Important

Uninstalling Docker Desktop destroys Docker containers, images, volumes, andother Docker related data local to the machine, and removes the files generatedby the application. Refer to the back up and restore datasection to learn how to preserve important data before uninstalling.

Where to go next

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  • Getting started provides an overview of Docker Desktop on Mac, basic Docker command examples, how to get help or give feedback, and links to other topics about Docker Desktop on Mac.
  • Troubleshooting describes common problems, workarounds, howto run and submit diagnostics, and submit issues.
  • FAQs provide answers to frequently asked questions.
  • Release notes lists component updates, new features, and improvements associated with Docker Desktop releases.
  • Get started with Docker provides a general Docker tutorial.
  • Back up and restore data provides instructionson backing up and restoring data related to Docker.

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Install Docker Compose Digitalocean

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