linux安装docker

1、linux安装docker

1.1、官网安装文档

https://docs.docker.com/engine/install/binaries/

1.2、下载docker安装包

官方下载链接：https://download.docker.com/linux/static/stable/
选择最新版 26.1.0 下载

文件名：docker-26.1.0.tgz

2、安装docker 26.1.0

上传docker-26.1.0.tgz到linux服务器

cd /path/to/docker-26.1.0.tgz

tar -xzvf docker-26.1.0.tgz
cp docker/* /usr/bin/

至此安装完成docker

查看docker版本

docker --version

3、配置docker systemd服务

vi /etc/systemd/system/docker.service

插入以下内容

[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

为docker.service添加可执行权限

chmod +x  /etc/systemd/system/docker.service

重新加载docker.service配置文件，使得systemctl识别docker.service

systemctl daemon-reload

配置docker.service开机自启动

systemctl enable docker.service

启动docker服务

systemctl start docker.service

查看docker服务

systemctl status docker.service

查看docker信息

docker info

得知docker默认的根目录是 /var/lib/docker

查看docker根目录的组织结构

ls -l /var/lib/docker

整个根目录大小是340K