Centos离线安装Docker（无坑版）

1、下载并上传docker离线安装包

2、上传到离线安装的服务器解压

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tar -zxvf docker-28.1.1.tgz

#拷贝解压二进制文件到相关目录
cp docker/* /usr/bin/

3、创建docker启动文件

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cat << EOF > /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
ExecStart=/usr/bin/dockerd
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutStartSec=0
RestartSec=2
Restart=always
StartLimitBurst=3
StartLimitInterval=60s
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
Delegate=yes
KillMode=process
OOMScoreAdjust=-500

[Install]
WantedBy=multi-user.target

EOF

4、创建Containerd启停文件

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cat << EOF > /usr/lib/systemd/system/containerd.service 

# Copyright The containerd Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target

[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/bin/containerd

Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5

# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNPROC=infinity
LimitCORE=infinity

# Comment TasksMax if your systemd version does not supports it.
# Only systemd 226 and above support this version.
TasksMax=infinity
OOMScoreAdjust=-999

[Install]
WantedBy=multi-user.target

EOF

5、启动Containerd

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systemctl enable --now containerd

systemctl status containerd

6、启动docker

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systemctl enable --now docker

systemctl status docker

二、镜像包处理

1、从有镜像包的服务器导出镜像

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docker save -o oracle-12c.zip 21789d4d876f

2、上传导出的镜像到离线服务器上

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docker load < oracle-12c.zip

有了镜像后，就可以正常创建服务了。

参考地址：CentOS7.9安装