1下载docker二进制文件
https://download.docker.com/linux/static/stable/x86_64/
2解压tar包
tar xf docker-20.10.0.tgz
3解压缩完成后将docker目录中的所有文件复制至/usr/bin/目录下
cp docker/* /usr/bin
4 配置docker.service文件
vim /usr/lib/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
5daemon.json说明
{
"api-cors-header": "",
"authorization-plugins": [ ],
"bip": "",
"bridge": "",
"cgroup-parent": "",
"cluster-store": "",
"cluster-store-opts": { },
"cluster-advertise": "",
"debug": true, # 启用debug的模式，启用后，可以看到很多的启动信息，默认false
"default-gateway": "",
"default-gateway-v6": "",
"default-runtime": "runc",
"default-ulimits": { },
"disable-legacy-registry": false,
"dns": ["192.168.1.1"], # 设定容器DNS的地址，在容器的 /etc/resolv.conf文件中可查看
"dns-opts": [ ], # 容器 /etc/resolv.conf 文件，其他设置
"dns-search": [ ], # 设定容器的搜索域，当设定搜索域为 .example.com 时，在搜索一个名为 host 的 主机时，DNS不仅搜索host，还会搜索host.example.com 。 注意：如果不设置， Docker 会默认用主机上的 /etc/resolv.conf 来配置容器
"exec-opts": [ ],
"exec-root": "",
"fixed-cidr": "",
"fixed-cidr-v6": "",
"graph": "/var/lib/docker", # 已废弃，使用data-root代替,这个主要看docker的版本
"data-root": "/var/lib/docker", # Docker运行时使用的根路径，默认/var/lib/docker
"group": "", # Unix套接字的属组,仅指/var/run/docker.sock
"hosts": [ ], # 设置容器hosts
"icc": false,
"insecure-registries": [ ], # 配置docker的私库地址
"ip": "0.0.0.0",
"iptables": false,
"ipv6": false,
"ip-forward": false, # 默认true, 启用 net.ipv4.ip_forward ,进入容器后使用 sysctl -a | grepnet.ipv4.ip_forward 查看
"ip-masq": false,
"labels": ["nodeName=node-121"], # docker主机的标签，很实用的功能，例如定义：–label nodeName=host-121
"live-restore": true,
"log-driver": "",
"log-level": "",
"log-opts": { },
"max-concurrent-downloads": 3,
"max-concurrent-uploads": 5,
"mtu": 0,
"oom-score-adjust": -500,
"pidfile": "", # Docker守护进程的PID文件
"raw-logs": false,
"registry-mirrors": ["xxxx"], # 镜像加速的地址，增加后在 docker info中可查看
"runtimes": {
"runc": {
"path": "runc"
},
"custom": {
"path": "/usr/local/bin/my-runc-replacement",
"runtimeArgs": [
"--debug"
]
}
},
"selinux-enabled": false, # 默认 false，启用selinux支持
"storage-driver": "",
"storage-opts": [ ],
"swarm-default-advertise-addr": "",
"tls": true, # 默认false, 启动TLS认证开关
"tlscacert": "", # 默认~/.docker/ca.pem，通过CA认证过的的certificate文件路径
"tlscert": "", # 默认~/.docker/cert.pem，TLS的certificate文件路径
"tlskey": "", # 默认~/.docker/key.pem，TLS的key文件路径
"tlsverify": true, # 默认false，使用TLS并做后台进程与客户端通讯的验证
"userland-proxy": false,
"userns-remap": ""
}
6daemon.json 样例
cat /etc/docker/daemon.json
{
"registry-mirrors": ["https://bjjtv7cs.mirror.aliyuncs.com"],
"insecure-registries": ["172.176.17.1:5000"]
}
7启动docker
systemctl daemon-reload
systemctl enable --now dockeer