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

Reading package lists... Done
Building dependency tree    
Reading state information... Done
Package 'docker-engine' is not installed, so not removed
Package 'docker' is not installed, so not removed
Package 'containerd' is not installed, so not removed
Package 'docker.io' is not installed, so not removed
Package 'runc' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 3 not upgraded.

sudo apt-get update

udo apt-get install \
  apt-transport-https \
  ca-certificates \
  curl \
  gnupg-agent \
  software-properties-common

# curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

# apt-key fingerprint 0EBFCD88

pub  rsa4096 2017-02-22 [SCEA]
   9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88
uid      [ unknown] Docker Release (CE deb) <[email protected]>
sub  rsa4096 2017-02-22 [S]

$ sudo add-apt-repository \
  "deb [arch=amd64] https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu/ \
  $(lsb_release -cs) \
  stable"

 $ sudo apt-get update

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

$ docker pull hello-world
$ docker run hello-world
#出现以下信息，表示docker安装成功，已经可以正常运行
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.(amd64)
  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/

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://XXX你的id.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

#首先确定mysql是否能被搜素到，这步可以跳过，也可以在dockerhub.com中搜索
docker search mysql

#拉取镜像
docker pull mysql  #这里默认是拉取的最新版本，如果需要特定版本可以在镜像后面添加tag，具体版本信息可以在dockerhub.com查询

#特定版本拉取,比如要拉取8.0.22(版本号一定要是官方放出的版本号，否则是查找不到的)
docker pull mysql:8.0.22

#这时可以查看下拉取的镜像
docker images

#运行镜像
docker run -d -p 3306:3306 -v /crownBlog/datadir:/var/lib/mysql --name crownBlog-mysql -e MYSQL_ROOT_PASSWORD=123456  mysql

# -d 表示后台运行，并返回容器id
# -p 3006:3306 表示端口映射，具体为 -p 主机端口：容器端口
# --name 给容器取个名字
# -e MYSQL_ROOT_PASSWORD=password 给mysql root管理员设置密码
# -v /crownBlog/datadir:/var/lib/mysql 添加数据卷
/crownBlog/datadir是主机的数据库路径
/var/lib/mysql是容器中的数据库路径，这一步非常重要

#进入容器配置
docker exec -it crownBlog-mysql bash

root@ed9345077e02:/# mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.22 MySQL Community Server - GPL
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its affiliates.
Other names may be trademarks of their respective owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql>

# 之后就和一般情况下mysql的操作一样了。

docker cp crownBlog.sql crownBlog-mysql:/home 
(docker cp 第一个参数指定本地文件或者文件夹，第二个参数指定容器及容器内的目标文件夹)

FROM golang:latest
RUN go env -w GO111MODULE=on
RUN go env -w GOPROXY=https://goproxy.cn,https://goproxy.io,direct

WORKDIR $GOPATH/src/crownBlog
COPY . $GOPATH/src/crownBlog

RUN go build .

EXPOSE 8085

ENTRYPOINT ["./blog"]   

$ docker build -t crownblog .
$ docker run -d -p 8085:8085--name crownblog crownblog

 
#这样访问服务器IP:8085就可以访问网站了