在线安装
# 卸载旧版本
yum remove docker docker-client docker-client-latest docker-common docker-latest docker-latest-logrotate docker-logrotate docker-engine
# 安装GCC
yum -y install gcc
yum -y install gcc-c++
# 安装软件包
yum install -y yum-utils
# 设置镜像仓库
## 官方设置
yum-config-manager --add-repo https://download.docker.com/linux/centos/dockerce.repo
## 阿里云
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
# 更新yum索引
yum makecache fast
# 安装
yum -y install docker-ce docker-ce-cli containerd.io
# 启动
systemctl start docker
# 设置自启动
systemctl enable docker
# 信息查看
docker version
# 测试
docker run hello-world
调整默认DATA路径
Docker 默认安装的情况下,会使用/var/lib/docker/目录作为存储目录,用以存放拉取的镜像和创建的容器等。不过由于此目录一般都位于系统盘,遇到系统盘比较小,而镜像和容器多了后就容易出问题,这里说明一下如何修改 Docker 的默认存储目录
1、查看当前docker的默认存储目录
docker info
2、停止docker服务
systemctl stop docker
3、目录迁移
3.1创建新的docker目录,执行命令df -h,找一个大的磁盘。 比如在/home目录下面建了 /home/docker目录,执行命令:
mkdir -p /home/docker
3.2迁移/var/lib/docker目录下面的文件到 /home/docker
rsync -avz /var/lib/docker /home/docker
#和cp类似,只不过是会自动过滤,目标目录有的文件不会重新拷贝
4、编辑/etc/docker/daemon.json文件
vi /etc/docker/daemon.json
默认情况下这个配置文件是没有的,这里实际也就是新建一个,然后写入以下内容:
{
"registry-mirrors": ["http://hub-mirror.c.163.com"],
"data-root/graph": "/home/docker"
}
#data-root/graph取决于具体的ubuntu版本或者kernel版本决定要用data-root还是graph
#/home/docker --> docker的存储路径
5、保存退出,然后重启 docker 服务
systemctl restart docker
6、检查docker存储路径是否配置成功
docker info
#Docker Root Dir: /home/docker
7、启动成功后,再确认之前的镜像还在
docker ps -a
docker images
8、确定容器、镜像没问题后删除/var/lib/docker/目录中的文件。
rm -rf /var/lib/docker/*
离线安装
官方指南:docs.docker.com/engine/inst…
Install static binaries
-
Download the static binary archive. Go to download.docker.com/linux/stati…, choose your hardware platform, and download the
.tgzfile relating to the version of Docker Engine you want to install. -
Extract the archive using the
tarutility. Thedockerdanddockerbinaries are extracted.$ tar xzvf /path/to/FILE.tar.gz -
Optional: Move the binaries to a directory on your executable path, such as
/usr/bin/. If you skip this step, you must provide the path to the executable when you invokedockerordockerdcommands.$ sudo cp docker/* /usr/bin/ -
Start the Docker daemon:
$ sudo dockerd &If you need to start the daemon with additional options, modify the above command accordingly or create and edit the file
/etc/docker/daemon.jsonto add the custom configuration options. -
Verify that Docker is installed correctly by running the
hello-worldimage.$ sudo docker run hello-worldThis command downloads a test image and runs it in a container. When the container runs, it prints a message and exits.