CentOS7非root用户离线安装Docker及常见问题总结、加各种操作系统docker桌
环境说明1、安装用户有sudo权限
2、本文讲docker组件安装，不是桌面程序安装
3、本文讲离线安装，不是在线安装
4、目的呆板是内网呆板，与外部网络不连通
下载
1、下载离线安装包，并上传到$HOME/basic-tool 目次
下载地点：Index of linux/static/stable/x86_64/
我下的这个：
https://download.docker.com/linux/static/stable/x86_64/docker-20.10.24.tgz
理由：rpm的安装起来反而麻烦，缺这个库缺那个库的
# Docker 的扩展功能包（在离线安装包下载地点页面）
docker-rootless-extras-20.10.24.tgz
说明："rootless" 通常指的是不需要 root 权限就能运行 Docker 的特性
安装
1、解压
cd $HOME/basic-tool
tar -xvf docker-20.10.24.tgz 2、安装
sudo cp docker/* /usr/bin/ 3、注册docker.service服务
# 用vi就行了，vim用的刚装的机器上都没这命令
vi /etc/systemd/system/docker.service
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target
Type=notify
ExecStart=/usr/bin/dockerd --selinux-enabled=false --insecure-registry=127.0.0.1
ExecReload=/bin/kill -s HUP $MAINPID
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TimeoutStartSec=0
Delegate=yes
KillMode=process
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s
WantedBy=multi-user.target 4、添加镜像加速(此步可选)
sudo mkdir -p /etc/docker sudo tee /etc/docker/daemon.json <<-'EOF'
{
"oom-score-adjust": -1000,
"log-driver": "json-file",
"log-opts": {
"max-size": "20m",
"max-file": "3"
},
"max-concurrent-downloads": 10,
"max-concurrent-uploads": 10,
"registry-mirrors": ["https://sto5ef1n.mirror.aliyuncs.com"],
"storage-driver": "overlay2",
"storage-opts": [
"overlay2.override_kernel_check=true"
]
}
EOF
5、创建 Docker 组并添加（当前）用户
# 添加用户组 docker
sudo groupadd docker
# 添加用户
sudo usermod -aG docker $USER
# 等价于
# sudo usermod -aG docker xxx(当前用户名)
#更新用户组
newgrp docker 6、启动 Docker 服务
sudo chmod 777 /etc/systemd/system/docker.service
sudo systemctl daemon-reload
sudo systemctl enable docker
sudo systemctl start docker 7、验证安装
systemctl status docker
docker -v
docker info 常见问题
1、实验docker下令时报权限错
$ docker ps
Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock:
Get "http://%2Fvar%2Frun%2Fdocker.sock/v1.24/containers/json":
dial unix /var/run/docker.sock: connect: permission denied 解决：更新用户组
#更新用户组
newgrp docker
总结
因大部门文章都不完备，不是少这步就是少那步，本文章是作者看了网上多个文章后取其英华并美满整理而来。作者此贴已亲测并验证通过，请放心参考！
附件
附件一：创建linux用户
# 创建用户组（上面有执行过）
# groupadd docker -g 200
# 创建 docker 用户第一个docker是分组名，第二个docker是用户名
sudo useradd -g docker docker
sudo usermod -aG docker docker
# 修改 docker 用户密码
passwd docker 附件二：将docker添加到sudo用户列表
# 没错这里就是vi和sudo两命令连在一起，中间没有空格
visudo # 最后一行添加，保存即刻生效
docker ALL=(ALL) NOPASSWD:ALL
附件三：docker desktop下载
docker桌面程序下载地点
https://www.docker.com/
https://i-blog.csdnimg.cn/direct/be6ffa8c6d014c88abc88566d73361d7.png
附件四：rpm相干包下载地点
本文不需要用
https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-20.10.24-3.el7.x86_64.rpm
https://download.docker.com/linux/centos/7/x86_64/stable/Packages/containerd.io-1.6.33-3.1.el7.x86_64.rpm
# policycoreutils-python安装（装docker-ce-selinux的依赖，本文不需要用）
policycoreutils-python-2.5-34.el7.x86_64.rpm
附件五：不采用rpm包的理由
rpm的安装起来缺这个库缺那个库的
$ sudo rpm -ivh containerd.io-1.6.33-3.1.el7.x86_64.rpm
warning: containerd.io-1.6.33-3.1.el7.x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID 621e9f35: NOKEY
error: Failed dependencies:
container-selinux >= 2:2.74 is needed by containerd.io-1.6.33-3.1.el7.x86_64 $ sudo rpm -ivh docker-ce-20.10.24-3.el7.x86_64.rpm
warning: docker-ce-20.10.24-3.el7.x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID 621e9f35: NOKEY
error: Failed dependencies:
container-selinux >= 2:2.74 is needed by docker-ce-3:20.10.24-3.el7.x86_64
containerd.io >= 1.4.1 is needed by docker-ce-3:20.10.24-3.el7.x86_64
docker-ce-cli is needed by docker-ce-3:20.10.24-3.el7.x86_64
docker-ce-rootless-extras is needed by docker-ce-3:20.10.24-3.el7.x86_64
libcgroup is needed by docker-ce-3:20.10.24-3.el7.x86_64 $ sudo rpm -ivh docker-ce-rootless-extras-20.10.24-3.el7.x86_64.rpm
warning: docker-ce-rootless-extras-20.10.24-3.el7.x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID 621e9f35: NOKEY
error: Failed dependencies:
docker-ce is needed by docker-ce-rootless-extras-0:20.10.24-3.el7.x86_64
fuse-overlayfs >= 0.7 is needed by docker-ce-rootless-extras-0:20.10.24-3.el7.x86_64
slirp4netns >= 0.4 is needed by docker-ce-rootless-extras-0:20.10.24-3.el7.x86_64 $ sudo rpm -ivh policycoreutils-python-2.5-34.el7.x86_64.rpm
warning: policycoreutils-python-2.5-34.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
error: Failed dependencies:
audit-libs-python >= 2.1.3-4 is needed by policycoreutils-python-2.5-34.el7.x86_64
checkpolicy is needed by policycoreutils-python-2.5-34.el7.x86_64
libapol.so.4()(64bit) is needed by policycoreutils-python-2.5-34.el7.x86_64
libapol.so.4(VERS_4.0)(64bit) is needed by policycoreutils-python-2.5-34.el7.x86_64
libcgroup is needed by policycoreutils-python-2.5-34.el7.x86_64
libqpol.so.1()(64bit) is needed by policycoreutils-python-2.5-34.el7.x86_64
libqpol.so.1(VERS_1.2)(64bit) is needed by policycoreutils-python-2.5-34.el7.x86_64
libqpol.so.1(VERS_1.4)(64bit) is needed by policycoreutils-python-2.5-34.el7.x86_64
libselinux-python is needed by policycoreutils-python-2.5-34.el7.x86_64
libsemanage-python >= 2.5-14 is needed by policycoreutils-python-2.5-34.el7.x86_64
policycoreutils = 2.5-34.el7 is needed by policycoreutils-python-2.5-34.el7.x86_64
python-IPy is needed by policycoreutils-python-2.5-34.el7.x86_64
setools-libs >= 3.3.8-4 is needed by policycoreutils-python-2.5-34.el7.x86_64 附件六：iptables对外开放5151端口
sudo iptables -I INPUT -p tcp --dport 5151 -j ACCEPT
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