安装

在线安装

环境准备

1、Linux基础
2、CentOS 7
3、Xshell连接远程操作

环境查看

#系统内核
[root@Mi10Pro-C ~]# uname -r
3.10.0-229.el7.x86_64
# 系统版本
[root@Mi10Pro-C ~]# cat /etc/os-release 
NAME="Red Hat Enterprise Linux Server"
VERSION="7.1 (Maipo)"
ID="rhel"
ID_LIKE="fedora"
VERSION_ID="7.1"
PRETTY_NAME="Red Hat Enterprise Linux Server 7.1 (Maipo)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:redhat:enterprise_linux:7.1:GA:server"
HOME_URL="https://www.redhat.com/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 7"
REDHAT_BUGZILLA_PRODUCT_VERSION=7.1
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux"
REDHAT_SUPPORT_PRODUCT_VERSION="7.1"

安装

# 1、卸载旧版本
yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-engine
# 2、安装需要的安装包
yum install -y yum-utils
# 3、设置镜像的仓库地址
yum-config-manager \
    --add-repo \
    http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo    #阿里源
    https://download.docker.com/linux/centos/docker-ce.repo    #默认的这个是国外源
# 更新yum软件包的索引
yum makecache fast
# 3、安装docker引擎    docker-ce 社区 ee 企业版本
yum -y install docker-ce docker-ce-cli containerd.io
# 注意：最小化安装的可能会报错，原因是container-selinux版本过低
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
安装后重新安装docker
# 4、启动docker
systemctl start docker
systemctl enable docker.service
docker version
# 5、测试hello world
docker run hello-world
# 6、查看下载的hello world镜像
docker images
# 7、卸载docker
yum remove docker-ce docker-ce-cli containerd.io    #卸载依赖
rm -rf /var/lib/docker    #删除资源,默认的工作路径/var/lib/docker

配置阿里云镜像加速服务

1、登录阿里云找到容器镜像服务

2、找到镜像加速地址

3、配置使用

#您可以通过修改daemon配置文件/etc/docker/daemon.json来使用加速器
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://pvav6eq4.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

Docker Run的流程和原理

比虚拟机更少的抽象层，比虚拟机少了引导部分启动，决定了他更加轻量快速

离线安装docker

一、基础环境

1、Docker版本：18.06.1 官方下载地址（打不开可能需要梯子）
2、百度云Docker 18.06.1地址：https://pan.baidu.com/s/1YdN9z72QutPkHBfLq06H1A 密码：dvvh
3、官方参考文档：https://docs.docker.com/install/linux/docker-ce/binaries/#install-static-binaries

二、Docker安装

1、下载

wget https://download.docker.com/linux/static/stable/x86_64/docker-18.06.1-ce.tgz

2、解压

tar -xvf docker-18.06.1-ce.tgz

3、将解压出来的docker文件内容移动到 /usr/bin/ 目录下

cp docker/* /usr/bin/

4、将docker注册为service

vim /etc/systemd/system/docker.service
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service``Wants=network-online.target`` ` `[Service]``Type=notify``# the default is not to use systemd for cgroups because the delegate issues still``# exists and systemd currently does not support the cgroup feature set required``# for containers run by docker``ExecStart=/usr/bin/dockerd``ExecReload=/bin/kill -s HUP $MAINPID``# Having non-zero Limit*s causes performance problems due to accounting overhead``# in the kernel. We recommend using cgroups to do container-local accounting.``LimitNOFILE=infinity``LimitNPROC=infinity``LimitCORE=infinity``# Uncomment TasksMax if your systemd version supports it.``# Only systemd 226 and above support this version.``#TasksMax=infinity``TimeoutStartSec=0``# set delegate yes so that systemd does not reset the cgroups of docker containers``Delegate=yes``# kill only the docker process, not all processes in the cgroup``KillMode=process``# restart the docker process if it exits prematurely``Restart=``on``-failure``StartLimitBurst=3``StartLimitInterval=60s`` ` `[Install]``WantedBy=multi-user.target

5、启动

chmod +x /etc/systemd/system/docker.service #添加文件权限并启动docker
systemctl daemon-reload         #重新加载配置文件
systemctl start docker     #启动Docker
systemctl enable docker.service     #设置开机自启

6、验证

systemctl status docker     #查看Docker状态
docker -v      #查看Docker版本