Ubuntu docker user guide

[大法师]

Check your linux system whether installed docker, if done skip this step.

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg

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

apt update

apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin

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Non-root users need to add sudo prefix. This operation is complicated. Now use the following operation to remove it.

sudo groupadd docker
sudo gpasswd -a ${USER} docker
sudo systemctl restart docker
exit or open a new terminal shell 

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Run hello-world image

coolpi@coolpi:~$ docker version
Client: Docker Engine - Community
 Version:           20.10.22
 API version:       1.41
 Go version:        go1.18.9
 Git commit:        3a2c30b
 Built:             Thu Dec 15 22:27:17 2022
 OS/Arch:           linux/arm64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.22
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.18.9
  Git commit:       42c8b31
  Built:            Thu Dec 15 22:25:29 2022
  OS/Arch:          linux/arm64
  Experimental:     false
 containerd:
  Version:          1.6.14
  GitCommit:        9ba4b250366a5ddde94bb7c9d1def331423aa323
 runc:
  Version:          1.1.4
  GitCommit:        v1.1.4-0-g5fd4c4d
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0
coolpi@coolpi:~$ docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
7050e35b49f5: Pull complete
Digest: sha256:aa0cc8055b82dc2509bed2e19b275c8f463506616377219d9642221ab53cf9fe
Status: Downloaded newer image for hello-world:latest

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

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (arm64v8)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/get-started/

coolpi@coolpi:~$

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[大法师]

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Build a docker image with Dockerfile

$ cat Dockerfile
FROM ubuntu:20.04
MAINTAINER JACK<jack@cool-pi.com>

#RUN sed -i s@/ports.ubuntu.com/@/mirrors.aliyun.com/@g /etc/apt/sources.list \
    && apt-get clean

RUN apt-get update

ENV DEBIAN_FRONTEND=noninteractive

RUN apt-get install -y build-essential chrpath vim expect git curl dialog tzdata locales iputils-ping net-tools

ENV TZ=Asia/Shanghai

RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone

RUN locale-gen en_US.UTF-8 && DEBIAN_FRONTEND=noninteractive dpkg-reconfigure locales

ENV LANG=en_US.UTF-8

ENV LANGUAGE=en_US.UTF-8

ENV LC_ALL=en_US.UTF-8

RUN locale-gen en_US

RUN useradd coolpi;\
  adduser coolpi sudo;\
  mkdir -p /home/coolpi;\
  chown coolpi:coolpi -R /home/coolpi;\
  echo coolpi:coolpi | chpasswd;

#CMD su -l coolpi
#CMD "/bin/bash"

$ docker build -t my-ubuntu:20.04 --rm=true .
...

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