Docker installation tutorial

1. Offline installation

1. CentOS offline installation

1. Download address

1. Select the model of the system, select linux-CentOS

download link

2. Upload the file to the CentOS server

rz
#选择文件

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Two, start the installation

1. Unzip the compressed package

tar -zxvf docker-20.10.9.tgz

2. Copy the decompressed file to the /usr/bin directory

cp docker/* /usr/bin/Copy the decompressed files to the /usr/bin directory through the command .

3. Register the docker service and start it up

Create a docker.service file in /etc/systemd/systemthe directory to register the docker service and boot

#创建一个docker.service文件
vi /etc/systemd/system/docker.service

#内容如下：

[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target
[Service]
Type=notify
ExecStart=/usr/bin/dockerd --selinux-enabled=false --insecure-registry=127.0.0.1
ExecReload=/bin/kill -s HUP $MAINPID
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TimeoutStartSec=0
Delegate=yes
KillMode=process
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s
[Install]
WantedBy=multi-user.target

4. Set permissions for the service file

chmod 777 /etc/systemd/system/docker.service

5. Reload configuration

systemctl daemon-reload

6. Set docker to start at boot

systemctl enable docker.service

7. Start docker

systemctl start docker

8. Check the status of the container

systemctl status docker

9. Check whether the installed version is correct

docker -v

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2. Ubuntu offline installation

1. Download address

1. Select the model of the system, select linux-Ubuntu

download link

2. Upload the file to the Ubuntu server

#选择文件。
rz

#有可能ubuntu系统没有此功能，需要下载，见图一。
apt install lrzsz

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Two, start the installation

1. Unzip the compressed package

tar -zxvf docker-20.10.9.tgz

2. Copy the decompressed file to the /usr/bin directory

cp docker/* /usr/bin/Copy the decompressed files to the /usr/bin directory through the command .

3. Register the docker service and start it up

Create a docker.service file in /etc/systemd/systemthe directory to register the docker service and boot

#创建一个docker.service文件
vi /etc/systemd/system/docker.service

#内容如下：

[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target
[Service]
Type=notify
ExecStart=/usr/bin/dockerd --selinux-enabled=false --insecure-registry=127.0.0.1
ExecReload=/bin/kill -s HUP $MAINPID
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TimeoutStartSec=0
Delegate=yes
KillMode=process
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s
[Install]
WantedBy=multi-user.target

4. Set permissions for the service file

chmod 777 /etc/systemd/system/docker.service

5. Reload configuration

systemctl daemon-reload

6. Set docker to start at boot

systemctl enable docker.service

7. Start docker

systemctl start docker

8. Check the status of the container

systemctl status docker

9. Check whether the installed version is correct

docker -v

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2. Online installation

1. CentOS online installation

1. Preconditions

1. Check the system kernel

Note: Generally, the latest version can ignore this step.

Docker needs to be installed on the 64-bit version of CentOS. In addition, you also need to ensure that the minimum version of your CentOS kernel is not lower than 3.10, and the 3.10 minor version and update maintenance version are also available.

uname -r 

2. Uninstall the old version

Older versions of Docker are called dockeror docker-engine, uninstall older versions with the following command:

yum install apt

sudo apt-get remove docker docker-engine docker.io

3. Uninstall the old version and report an error

sudo rm /var/cache/apt/archives/lock

sudo rm /var/lib/dpkg/lock-frontend

Two, start the installation

1. Use script to install automatically

In order to simplify the installation process in the test or development environment, Docker official provides a set of convenient installation scripts, which can be used to install on the Ubuntu system, and can also be installed using domestic sources through the --mirror option:

curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyun

Note: If the warning shown in the figure below appears, there is no need to worry, and you can continue to the next step.

5. Start Docker

sudo systemctl enable docker

sudo systemctl start docker

Note: Here is a prompt to execute /lib/systemd/systemd-sysv-install enable dockerthis command. Then run it again .

6. Check whether the installation is successful

docker compose version

docker --version

docker version

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1. Ubantu online installation

1. Preconditions

1. Check the system kernel

Note: Generally, the latest version can ignore this step.

Docker needs to be installed on a 64-bit version of Ubuntu. In addition, you also need to ensure that the minimum version of your Ubuntu kernel is not lower than 3.10, and the 3.10 minor version and update maintenance version are also available.

uname -r 

2. Uninstall the old version

Older versions of Docker are called dockeror docker-engine, uninstall older versions with the following command:

sudo apt-get remove docker docker-engine docker.io

3. Uninstall the old version and report an error

sudo rm /var/cache/apt/archives/lock

sudo rm /var/lib/dpkg/lock-frontend

Two, start the installation

1. The default version number is installed

sudo apt-get update

sudo apt-get install \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg \
    lsb-release

2. Add GPGthe key of the software source

curl -fsSL https://mirrors.aliyun.com/docker-ce/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

3. Add Docker software source

sources.listAdd Docker repository to .

echo \
   "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

3. Update the apt package cache and installdocker-ce

sudo apt-get update

sudo apt-get install docker-ce docker-ce-cli containerd.io

4. Automatically install using scripts

In order to simplify the installation process in the test or development environment, Docker official provides a set of convenient installation scripts, which can be used to install on the Ubuntu system, and can also be installed using domestic sources through the --mirror option:

curl -fsSL get.docker.com -o get-docker.sh

sudo sh get-docker.sh --mirror Aliyun

Note: If the warning shown in the figure below appears, there is no need to worry, and you can continue to the next step.

5. Start Docker

sudo systemctl enable docker

sudo systemctl start docker

Note: Here is a prompt to execute /lib/systemd/systemd-sysv-install enable dockerthis command. Then run it again .

6. Check whether the installation is successful

docker compose version

docker --version

docker version

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3. Create a docker user group

1. Create a docker group

sudo groupadd docker

2. Add the current user to the docker group

sudo usermod -aG docker $USER

4. Test whether Docker is installed correctly

docker run --rm hello-world