12/28/2021

Macos Docker Image

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With Visual Studio for Mac, you can easily build, debug, and run containerized ASP.NET Core apps and publish them to Azure.

Posted: (1 week ago) Sep 15, 2015 Docker Desktop stores Linux containers and images in a single, large “disk image” file in the Mac filesystem. This is different from Docker on Linux, which usually stores containers and images in the /var/lib/docker directory. On my Mac with MacOS 10.14.6 Mojave, running Docker version 19.03.8. Docker-desktop-robot commented on May 5. Issues go stale after 90 days of inactivity. Mark the issue as fresh with /remove-lifecycle stale comment. Stale issues will be closed after an additional 30 days of inactivity. Prevent issues from auto-closing with an /lifecycle frozen comment.

Prerequisites

Installation and Setup

For Docker installation, review and follow the information at Install Docker Desktop for Mac.

Creating an ASP.NET Core Web Application and Adding Docker Support

  1. Create a new solution by going to File > New Solution.
  2. Under .NET Core > App choose the Web Application template:
  3. Select the target framework. In this example we will use .NET Core 2.2:
  4. Enter the project details, such as name (DockerDemo in this example). The created project contains all the basics you need to build and run an ASP.NET Core web site.
  5. In the Solution Window, right click the DockerDemo project and select Add > Add Docker Support:

Visual Studio for Mac will automatically add a new project to your solution called docker-compose and add a Dockerfile to your existing project.

Dockerfile Overview

A Dockerfile is the recipe for creating a final Docker image. Refer to Dockerfile reference for an understanding of the commands within it.

The preceding Dockerfile is based on the microsoft/aspnetcore image, and includes instructions for modifying the base image by building your project and adding it to the container.

Note

The default Dockerfile created by Visual Studio for Mac exposes Port 80 for HTTP traffic. To enable HTTPS traffic, add Expose 443 to the Dockerfile.

Debugging

Select the docker-compose project as the Startup Project and start debugging (Run > Start Debugging). This will build, deploy and launch the ASP.NET project in a container.

Tip

On the first run after installing Docker Desktop, you may receive the following error when trying to debug: Cannot start service dockerdemo: Mounts denied

Add /usr/local/share/dotnet/sdk/NuGetFallbackFolder to the File Sharing tab in Docker Desktop:

When the build is completed, the application will be launched in Safari:

Note that the container will be listening on a port, http://localhost:32768 for example, and this port may vary.

To see the list of running containers, use the docker ps command in Terminal.

Note the port relay in the screenshot below (under PORTS). This shows that the container is listening on the port we saw in Safari above and relaying requests to the internal webserver on port 80 (as defined in the Dockerfile). From the application's perspective, it is listening on port 80:

Estimated reading time: 5 minutes

Docker is a set of platform as a service (PaaS) products that use OS-level virtualization to deliver software in packages called containers. Containers are isolated from one another and bundle their own software, libraries and configuration files; they can communicate with each other through well-defined channels. Then you can save this image to a file. Sudo docker save -o ubuntuimage.docker ubuntu Transfer the file on the offline computer (USB/CD/whatever) and load the image from the file: sudo docker load -i ubuntuimage.docker (On older versions this was just docker load image.docker, see comments for more info.). A workaround for this is to use the `-offline` flag and will fix the issue as long as jib has already pulled the base Docker image in its cache. With Maven, type:./mvnw -Pprod package verify jib:dockerBuild -offline. By default, the docker-compose command reads the file with the name docker-compose.yml or docker-compose.yaml in the same working directory where you issue the command. Using your choice of available text editor, open a new blank file. Then, copy the YAML code below, paste it in your editor, and then save the docker-compose.yml file. Verify that Docker is installed correctly by running the hello-world image. The value of is a hostname or IP address running the Docker daemon and accessible to the client. $ sudo docker -H run hello-world.

Note: You may have been redirected to this page because there is no longera dynamically-linked Docker package for your Linux distribution.

If you want to try Docker or use it in a testing environment, but you’re not ona supported platform, you can try installing from static binaries. If possible,you should use packages built for your operating system, and use your operatingsystem’s package management system to manage Docker installation and upgrades.Be aware that 32-bit static binary archives do not include the Docker daemon.

Static binaries for the Docker daemon binary are only available for Linux (asdockerd). Static binaries for the Docker client are available for Linux and macOS (as docker).

This topic discusses binary installation for both Linux and macOS:

Install daemon and client binaries on Linux

Prerequisites

Before attempting to install Docker from binaries, be sure your host machinemeets the prerequisites:

  • A 64-bit installation
  • Version 3.10 or higher of the Linux kernel. The latest version of the kernelavailable for your platform is recommended.
  • iptables version 1.4 or higher
  • git version 1.7 or higher
  • A ps executable, usually provided by procps or a similar package.
  • XZ Utils 4.9 or higher
  • A properly mountedcgroupfs hierarchy; a single, all-encompassing cgroup mountpoint is not sufficient. See Github issues#2683,#3485,#4568).

Secure your environment as much as possible

OS considerations

Docker Image Download Offline Untuk

Enable SELinux or AppArmor if possible.

It is recommended to use AppArmor or SELinux if your Linux distribution supportseither of the two. This helps improve security and blocks certaintypes of exploits. Review the documentation for your Linux distribution forinstructions for enabling and configuring AppArmor or SELinux.

Docker Image Download Offline Windows 10

Security Warning

If either of the security mechanisms is enabled, do not disable it as awork-around to make Docker or its containers run. Instead, configure itcorrectly to fix any problems.

Docker daemon considerations
  • Enable seccomp security profiles if possible. SeeEnabling seccomp for Docker.

  • Enable user namespaces if possible. See theDaemon user namespace options.

Install static binaries

  1. Download the static binary archive. Go tohttps://download.docker.com/linux/static/stable/(or change stable to nightly or test),choose your hardware platform, and download the .tgz file relating to theversion of Docker Engine you want to install.

  2. Extract the archive using the tar utility. The dockerd and dockerbinaries are extracted.

  3. Optional: Move the binaries to a directory on your executable path, suchas /usr/bin/. If you skip this step, you must provide the path to theexecutable when you invoke docker or dockerd commands.

  4. Start the Docker daemon:

    If you need to start the daemon with additional options, modify the abovecommand accordingly or create and edit the file /etc/docker/daemon.jsonto add the custom configuration options.

  5. Verify that Docker is installed correctly by running the hello-worldimage.

    This command downloads a test image and runs it in a container. When thecontainer runs, it prints an informational message and exits.

Install client binaries on macOS

The macOS binary includes the Docker client only. It does not include thedockerd daemon.

Download Centos Docker Image Offline

  1. Download the static binary archive. Go tohttps://download.docker.com/mac/static/stable/x86_64/,(or change stable to nightly or test),and download the .tgz file relating to the version of Docker Engine you wantto install.

  2. Extract the archive using the tar utility. The docker binary isextracted.

  3. Optional: Move the binary to a directory on your executable path, suchas /usr/local/bin/. If you skip this step, you must provide the path to theexecutable when you invoke docker or dockerd commands.

  4. Verify that Docker is installed correctly by running the hello-worldimage. The value of <hostname> is a hostname or IP address running theDocker daemon and accessible to the client.

    This command downloads a test image and runs it in a container. When thecontainer runs, it prints an informational message and exits.

Upgrade static binaries

To upgrade your manual installation of Docker Engine, first stop anydockerd or dockerd.exe processes running locally, then follow theregular installation steps to install the new version on top of the existingversion.

Next steps

Macos Docker Images

  • Continue to Post-installation steps for Linux.
  • Take a look at the Get started training modules to learn how to build an image and run it as a containerized application.
  • Review the topics in Develop with Docker to learn how to build new applications using Docker.

Macos Docker Image Location

Docker image vs container

Macos Docker Image Example

binaries, installation, docker, documentation, linux
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