Install the Docker engine

Docker engine is the core component of Docker container. Docker engine is provided by Docker Desktop on MAC and Win10, and is provided by Docker Server on Linux.

Centos install Docker Server

The resources

A prerequisite for

Operating System Requirements

  • Only CentOS 7 and CentOS 8 are supported
  • Must be enabledcentos-extrasThe repository. This repository is enabled by default, but you need to re-enable it if it has been disabled.

You can use yum Repolist [all] to list enabled libraries or all of them

$ yum repolist Loaded plugins: fastestmirror Repodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fast Loading mirror speeds from cached hostfile * nux-dextop: li.nux.ro repo id repo name status ! 7 / base/x86_64 CentOS - 7, 10072! epel/x86_64 Extra PackagesforEnterprise Linux 7 - X86_64 13 604! extras/7/x86_64 CentOS-7 498 ! nux-dextop/x86_64 Nux.Ro RPMsforGeneral Desktop Use 2,724! Updates /7/x86_64 centos-7,458 repolist: 29,356Copy the code
  • It is recommended to useoverlay2Storage driver.

Uninstall the previous version

Older versions of Docker were called Docker or Docker-Engine. If these are installed, uninstall them and their associated dependencies.

$ sudo yum remove docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-engine
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Keep /var/lib/docker-/ content, including images, containers, volumes, and networks. The Docker engine package is now called Docker-CE.

installation

The following ways can be more self-selecting

  • Docker repository and install from it for later installation and upgrade tasks. This is the recommended method.

  • Download the RPM package to manually install and later manually manage the upgrade, which is useful on some air gap systems that do not have access to the Internet.

    It was never mentioned in air Gapped, the separation of a computer from the Internet and from any computer connected to it.

  • In test and development environments, it is also appropriate to install Docker using automated, convenient scripts.

Install using a repository

Setting up the repository

Install the yum-utils package, which provides the yum-config-manager utility, and set up the stable repository.

Yum install -y yum-utils: yum install -y yum-utils: yum install -y yum-utils: yum install -y yum-utils: yum install -y yum-utils: yum install -y yum-utils: yum install -y yum-utils: yum install -y yum-utils: yum install -y yum-utils: yum install -y yum-utils: yum install -y yum-utils

 $ sudo yum install -y yum-utils
 $ sudo yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo
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Install the Docker engine
  1. Install the latest versions of Docker Engine and Containerd
$ sudo yum install docker-ce docker-ce-cli containerd.io
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If you are prompted to accept the GPG key, check whether the fingerprint matches 060A 61C5 1B55 8A7F 742B 77AA C52F EB6B 621E 9F35. If yes, accept the GPG key.

  1. To install a specific version of the Docker Engine, list the available versions in the repo, then select and install:

    A. List and sort the versions available in the current repository. This example sorts the results by version number, from highest to lowest, and is truncated:

    [root@zjlyyq yum.repos.d]# yum list docker-ce --showduplicates | sort -r
 * nux-dextop: li.nux.ro
Loading mirror speeds from cached hostfile
Loaded plugins: fastestmirror
Installed Packages
docker-ce.x86_64            3:20.10.8-3.el7                    docker-ce-stable
docker-ce.x86_64            3:20.10.8-3.el7                    @docker-ce-stable
docker-ce.x86_64            3:20.10.7-3.el7                    docker-ce-stable
docker-ce.x86_64            3:20.10.6-3.el7                    docker-ce-stable
.                            .                                  .
.                            .                                  .
.                            .                                  .
docker-ce.x86_64            17.03.3.ce-1.el7                   docker-ce-stable
docker-ce.x86_64            17.03.2.ce-1.el7.centos            docker-ce-stable
docker-ce.x86_64            17.03.1.ce-1.el7.centos            docker-ce-stable
docker-ce.x86_64            17.03.0.ce-1.el7.centos            docker-ce-stable
Available Packages

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    B. Install a specific version

    $ sudo yum install docker-ce-<VERSION_STRING> docker-ce-cli-<VERSION_STRING> containerd.io
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  2. Start the Docker

    $ sudo systemctl start docker
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  3. validation

    [root@zjlyyq ~]# sudo docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
b8dfde127a29: Pull complete
Digest: sha256:0fe98d7debd9049c50b597ef1f85b7c1e8cc81f59c8d623fcb2250e8bec85b38
Status: Downloaded newer image for hello-world:latest

Hello from Docker!
This message shows that your installation appears to be working correctly.

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Install using the RPM package

Install using a convenient script

10 to install Windows

System requirements

WSL 2 backend

  • Windows 10 64-bit: Home or Pro 2004 (Build 19041) or later, or Enterprise or Education 1909 (Build 18363) or later.
  • Enable WSL 2 on Windows.

  • Download and install the Linux kernel update package.

The company computer is the enterprise version, the version is relatively low, forcibly open Docket Desktop will be the following effect.

Use Docker images

Download mirror

Command:

docker pull [OPTIONS] NAME[:TAG|@DIGEST]

Options:
  -a, --all-tags                Download all tagged images in the repository
      --disable-content-trust   Skip image verification (default true)
      --platform string         Set platform if server is multi-platform capable
  -q, --quiet                   Suppress verbose output
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Example:

Download the Ubuntu 18.04 image and use itDocker pull ubuntu: 18.04

Agent to accelerate

You can add –registry-mirror=proxy_URL to the Docker startup configuration to specify the address of the proxy server (e.g., registry.docker-cn.com).

Viewing Mirror Information

docker inspect ...

Create a mirror image

There are three ways to create an image: from an existing image container, from a local template to an import, and from a Dockerfile.

Created based on an existing container

docker [container] commit [OPTIONS] CONTAINER [REPOSITORY[:TAG]]

OPTIONS:

  • -a, –author=””: indicates the author information
  • -c, –change=[]: Dockerfile command executed at commit time
  • -m, –message=””: submit the message
  • -p, –pause=true: pauses container execution during submission
zjl@zjl:~$ sudo docker commit -m "test port mapping and add some static files" -a "zjl"4 d22dbb1f90 nginx: 0.0.1 sha256:570 f2403b4c4c749df0d86cb41e88f5daaacd1ac1e4bbe9804b26cd63e9aa2b4 ZJL @ ZJL: ~ $sudo docker Images REPOSITORY TAG IMAGE ID CREATED SIZE nginx 0.0.1 570f2403b4C4 19 seconds ago 139MB nginx latest DD34e67e3371 2 days ago 133MB zjl@zjl:~$Copy the code

Import based on local templates

docker [image] import [OPTIONS] file|URL|-[REPOSITORY[:TAG]]

Create from Dockerfile

Docker is a text file that describes the process of creating a new image based on a parent image with a given instruction.

Image save and load

Docker [image] Save and docker [image] load

e.g.

Save for

load

Docker load < nginx_0. 0.1. The tar

Upload the image

  1. Add a TAG to the image to be uploaded. 
    Sudo docker tag nginx: 0.0.1${YOUR DOCKER USERNAME}/ nginx: 0.0.1Copy the code
  2. push 
    sudo docker push ${YOUR DOCKER USERNAME}/ nginx: 0.0.1Copy the code

The resources

  • Docs.docker.com/config/daem…
  • Stackoverflow.com/questions/5…