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查看环境

cat /etc/os-release

// 显示的内容
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"

卸载旧版本docker

$ sudo yum remove docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-engine

安装

$ sudo yum install -y yum-utils

// 这个是国外的
$ sudo yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo

// 使用国内阿里云镜像
sudo yum-config-manager \
    --add-repo \
    http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

安装docker相关的额外依赖

// ps. 先yum更新一下软件包的索引
yum makecache fast

已加载插件：langpacks, versionlock
baidu-bcm                                                                                                                                                                                                                                                | 2.5 kB  00:00:00
base                                                                                                                                                                                                                                                     | 3.6 kB  00:00:00
epel                                                                                                                                                                                                                                                     | 4.7 kB  00:00:00
extras                                                                                                                                                                                                                                                   | 2.9 kB  00:00:00
mysql-connectors-community                                                                                                                                                                                                                               | 2.6 kB  00:00:00
mysql-tools-community                                                                                                                                                                                                                                    | 2.6 kB  00:00:00
mysql57-community                                                                                                                                                                                                                                        | 2.6 kB  00:00:00
updates                                                                                                                                                                                                                                                  | 2.9 kB  00:00:00
(1/3): epel/x86_64/updateinfo                                                                                                                                                                                                                            | 1.0 MB  00:00:00
(2/3): updates/7/x86_64/primary_db                                                                                                                                                                                                                       | 4.7 MB  00:00:00
(3/3): epel/x86_64/primary_db                                                                                                                                                                                                                            | 6.9 MB  00:00:00
元数据缓存已建立

// docker-ce社区版 docker-ee企业版
sudo yum install docker-ce docker-ce-cli containerd.io

启动docker

$ sudo systemctl start docker
// 运行hello-world镜像
$ sudo docker run hello-world

// 没有镜像会下载
--------------------------------------------------------------------------------------------------------------------------------
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
0e03bdcc26d7: Pull complete
Digest: sha256:31b9c7d48790f0d8c50ab433d9c3b7e17666d6993084c002c2ff1ca09b96391d
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.
    (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/
--------------------------------------------------------------------------------------------------------------------------------
// 启动成功
docker version

Client:
 Version:         1.13.1
 API version:     1.26
 Package version: docker-1.13.1-103.git7f2769b.el7.centos.x86_64
 Go version:      go1.10.3
 Git commit:      7f2769b/1.13.1
 Built:           Sun Sep 15 14:06:47 2019
 OS/Arch:         linux/amd64

Server:
 Version:         1.13.1
 API version:     1.26 (minimum version 1.12)
 Package version: docker-1.13.1-103.git7f2769b.el7.centos.x86_64
 Go version:      go1.10.3
 Git commit:      7f2769b/1.13.1
 Built:           Sun Sep 15 14:06:47 2019
 OS/Arch:         linux/amd64
 Experimental:    false

镜像

// 查看镜像
docker images

// 删除镜像
docker rmi hello-world // hello-world 是一个镜像的镜像名称
// 如果镜像被启动
docker kill d880e52696e7 // d880e52696e7 是 CONTAINER ID
docker rm d880e52696e7 // 删除容器 然后才能删除镜像，否则镜像无法删除

卸载docker

// 删除依赖
$ sudo yum remove docker-ce docker-ce-cli containerd.io
// 删除文件
$ sudo rm -rf /var/lib/docker // 这是docker的默认资源路径

阿里云镜像加速

sudo mkdir -p /etc/docker

sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://980dldk8.mirror.aliyuncs.com"]
}
EOF

sudo systemctl daemon-reload

sudo systemctl restart docker

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