此文整理下当初安装docker的动作
Linux 服务器Docker安装
1. 安装包官方地址：https://download.docker.com/linux/static/stable/x86_64/
可以先下载到本地，然后通过ftp工具shell中的ftp工具上传到服务器上
2. 解压：tar -zxvf docker-18.06.3-ce.tgz
3. 将解压出来的docker文件复制到 /usr/bin/ 目录下
4. 创建docker.service文件
进入
[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 --selinux-enabled=false --insecure-registry=127.0.0.1 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 # 此处的–insecure-registry=127.0.0.1（此处改成你私服ip）设置是针对有搭建了自己私服Harbor时允许docker进行不安全的访问，否则访问将会被拒绝。
5. 启动docker
# 给docker.service文件添加执行权限
chmod +x /etc/systemd/system/docker.service
# 重新加载配置文件（每次有修改docker.service文件时都要重新加载下）
systemctl daemon-reload
# 启动
systemctl start docker
# 设置开机启动
systemctl enable docker.service
# 查看docker服务状态
[root@localhost system]# systemctl status docker
● docker.service - Docker Application Container Engine
Loaded: loaded (/etc/systemd/system/docker.service; enabled; vendor preset: disabled)
Active: active (running) since Tue 2022-06-28 00:54:47 PDT; 10s ago
Docs: https://docs.docker.com
Main PID: 45475 (dockerd)
CGroup: /system.slice/docker.service
├─45475 /usr/bin/dockerd --selinux-enabled=false --insecure-registry=10.1.20.150
└─45487 containerd --config /var/run/docker/containerd/containerd.toml --log-level info
Jun 28 00:54:46 localhost.localdomain dockerd[45475]: time="2022-06-28T00:54:46.158519178-07:00" level=info msg="ccResolverWrapper: sending update to cc: {[{unix:///var/run/docker/containerd..." module=grpc
Jun 28 00:54:46 localhost.localdomain dockerd[45475]: time="2022-06-28T00:54:46.158525449-07:00" level=info msg="ClientConn switching balancer to "pick_first"" module=grpc
Jun 28 00:54:46 localhost.localdomain dockerd[45475]: time="2022-06-28T00:54:46.202943588-07:00" level=info msg="Loading containers: start."
Jun 28 00:54:47 localhost.localdomain dockerd[45475]: time="2022-06-28T00:54:47.021854086-07:00" level=info msg="Default bridge (docker0) is assigned with an IP address 172.17.0.0/16. Daemon...d IP address"
Jun 28 00:54:47 localhost.localdomain dockerd[45475]: time="2022-06-28T00:54:47.126281901-07:00" level=info msg="Firewalld: interface docker0 already part of docker zone, returning"
Jun 28 00:54:47 localhost.localdomain dockerd[45475]: time="2022-06-28T00:54:47.244251569-07:00" level=info msg="Loading containers: done."
Jun 28 00:54:47 localhost.localdomain dockerd[45475]: time="2022-06-28T00:54:47.264592112-07:00" level=info msg="Docker daemon" commit=a89b842 graphdriver(s)=overlay2 version=20.10.17
Jun 28 00:54:47 localhost.localdomain dockerd[45475]: time="2022-06-28T00:54:47.265027319-07:00" level=info msg="Daemon has completed initialization"
Jun 28 00:54:47 localhost.localdomain systemd[1]: Started Docker Application Container Engine.
Jun 28 00:54:47 localhost.localdomain dockerd[45475]: time="2022-06-28T00:54:47.300116789-07:00" level=info msg="API listen on /var/run/docker.sock"
Hint: Some lines were ellipsized, use -l to show in full.
# 如上表示docker已安装成功
6. docker环境检查
docker info [root@localhost system]# docker info Running: 0 Paused: 0 Stopped: 0 Images: 0 Server Version: 20.10.17 Storage Driver: overlay2 Backing Filesystem: xfs Supports d_type: true Native Overlay Diff: true userxattr: false Logging Driver: json-file Cgroup Driver: cgroupfs Cgroup Version: 1 Plugins: Volume: local Network: bridge host ipvlan macvlan null overlay Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog Swarm: inactive Runtimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux runc Default Runtime: runc Init Binary: docker-init containerd version: 10c12954828e7c7c9b6e0ea9b0c02b01407d3ae1 runc version: v1.1.2-0-ga916309f init version: de40ad0 Security Options: seccomp Profile: default Kernel Version: 3.10.0-693.el7.x86_64 Operating System: CentOS Linux 7 (Core) OSType: linux Architecture: x86_64 CPUs: 4 Total Memory: 7.624GiB Name: localhost.localdomain ID: ZHES:U53P:FOPX:QKRO:4PQE:BIKC:OEQJ:7VUS:NBUQ:U47D:R3QO:JKKX Docker Root Dir: /var/lib/docker Debug Mode: false Registry: https://index.docker.io/v1/ Labels: Experimental: false Insecure Registries: 10.1.20.150 127.0.0.0/8 Live Restore Enabled: false Product License: Community Engine docker version [root@localhost system]# docker version Client: Version: 20.10.17 API version: 1.41 Go version: go1.17.11 Git commit: 100c701 Built: Mon Jun 6 22:56:42 2022 OS/Arch: linux/amd64 Context: default Experimental: true Server: Docker Engine - Community Engine: Version: 20.10.17 API version: 1.41 (minimum version 1.12) Go version: go1.17.11 Git commit: a89b842 Built: Mon Jun 6 23:01:45 2022 OS/Arch: linux/amd64 Experimental: false containerd: Version: v1.6.6 GitCommit: 10c12954828e7c7c9b6e0ea9b0c02b01407d3ae1 runc: Version: 1.1.2 GitCommit: v1.1.2-0-ga916309f docker-init: Version: 0.19.0 GitCommit: de40ad0
7. 安装好docker后还不能直接用docker命令，此时需要创建一个docker的group
sudo usermod -aG docker $USER （$USER就是当前登录服务器的用户名）；
这里可能会出现一个错误：usermod: group 'docker' does not exist
这是因为在安装docker的使用如果使用npm install来安装，它是不会给你创建docker的group的，所以我们需要自己创建一个；
如果报错执行：sudo groupadd docker #创建一个docker的group；
然后再执行添加用户操作就可以成功了，最后重启docker
sudo usermod -aG docker ${USER}
sudo systemctl restart docker
注销并重新登录，或者运行以下命令以更新当前会话的用户组成员身份
newgrp docker
8. 以上可以直接用docker命令来安装啦，无需再加sudo命令~