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Docker 无法配置为 systemd 服务

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Docker 无法配置为 systemd 服务

Docker 无法配置为服务。

安装 docker 后，没有任何 docker 命令响应，例如 docker info 或 docker version。

从包中安装了 docker ce 及其组件。

sudo dpkg -i containerd.io_1.2.4-1
             docker-ce_18.09.9~3-0~ubuntu-bionic_amd64.deb
             docker-ce-cli_18.09.9~3-0~ubuntu-bionic_amd64.deb

其次是

sudo systemctl enable docker.service
sudo systemctl enable containerd.service

docker.service 位于 /etc/systemd/system/multi-user.target.wants 下

BindsTo=containerd.service
After=network-online.target firewalld.service containerd.service
Wants=network-online.target
Requires=docker.socket

[Service]
Type=notify
EnvironmentFile=-/etc/default/docker
ExecStart=/usr/bin/docker daemon $DOCKER_OPTS -H fd:// --containerd=/run/containerd/containerd.sock
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
StartLimitBurst=3
StartLimitInterval=60s

LimitNOFILE=1048576
LimitNPROC=1048576
LimitCORE=1048576

TasksMax=infinity
Delegate=yes
KillMode=process

[Install]
WantedBy=multi-user.target

/etc/default/docker 内容：

export http_proxy="http://proxy.com:80/"
export https_proxy="http://proxy.com:80/"
export NO_PROXY="localhost,127.0.0.1,.example.com"
export no_proxy=$NO_PROXY

DOCKER_OPTS="--dns <dns server> --dns <dns server> -H tcp://0.0.0.0:4321 -H unix:///var/run/docker.sock --storage-driver=devicemapper --storage-opt dm.datadev=/dev/vg-docker/data  
--storage-opt dm.metadatadev=/dev/vg-docker/metadata --storage-opt dm.basesize=100G"

检查状态时，它只是挂起并显示以下消息

● docker.service - Docker Application Container Engine
   Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
   Active: activating (start) since Mon 2021-04-26 08:48:55 PDT; 2min 2s ago
     Docs: https://docs.docker.com
 Main PID: 21021 (docker)
    Tasks: 17
   CGroup: /system.slice/docker.service
           └─21021 /usr/bin/docker daemon --dns 171.40.110.110 --dns 171.40.110.111 -H tcp://0.0.0.0:4321 -H unix:///var/run/docker.sock --storage-driver=devicemapper -

 systemd[1]: Starting Docker Application Container Engine...

操作系统：Ubuntu 18.04

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