openeuler20.03在线安装docker最新版

更新系统软件包列表：
sudo yum update -y
添加Docker的官方仓库源：

sudo tee /etc/yum.repos.d/docker-ce.repo << EOF
[docker-ce-stable]
name=Docker CE Stable - $basearch
baseurl=https://download.docker.com/linux/centos/7/$basearch/stable
enabled=1
gpgcheck=1
gpgkey=https://download.docker.com/linux/centos/gpg

[docker-ce-stable-debuginfo]
name=Docker CE Stable - Debuginfo $basearch
baseurl=https://download.docker.com/linux/centos/7/debug-$basearch/stable
enabled=0
gpgcheck=1
gpgkey=https://download.docker.com/linux/centos/gpg

[docker-ce-stable-source]
name=Docker CE Stable - Sources
baseurl=https://download.docker.com/linux/centos/7/source/stable
enabled=0
gpgcheck=1
gpgkey=https://download.docker.com/linux/centos/gpg

[docker-ce-test]
name=Docker CE Test - $basearch
baseurl=https://download.docker.com/linux/centos/7/$basearch/test
enabled=0
gpgcheck=1
gpgkey=https://download.docker.com/linux/centos/gpg

[docker-ce-test-debuginfo]
name=Docker CE Test - Debuginfo $basearch
baseurl=https://download.docker.com/linux/centos/7/debug-$basearch/test
enabled=0
gpgcheck=1
gpgkey=https://download.docker.com/linux/centos/gpg

[docker-ce-test-source]
name=Docker CE Test - Sources
baseurl=https://download.docker.com/linux/centos/7/source/test
enabled=0
gpgcheck=1
gpgkey=https://download.docker.com/linux/centos/gpg

[docker-ce-nightly]
name=Docker CE Nightly - $basearch
baseurl=https://download.docker.com/linux/centos/7/$basearch/nightly
enabled=0
gpgcheck=1
gpgkey=https://download.docker.com/linux/centos/gpg

[docker-ce-nightly-debuginfo]
name=Docker CE Nightly - Debuginfo $basearch
baseurl=https://download.docker.com/linux/centos/7/debug-$basearch/nightly
enabled=0
gpgcheck=1
gpgkey=https://download.docker.com/linux/centos/gpg

[docker-ce-nightly-source]
name=Docker CE Nightly - Sources
baseurl=https://download.docker.com/linux/centos/$releasever/source/nightly
enabled=0
gpgcheck=1
gpgkey=https://download.docker.com/linux/centos/gpg
EOF

openEuler.repo:

#generic-repos is licensed under the Mulan PSL v2.
#You can use this software according to the terms and conditions of the Mulan PSL v2.
#You may obtain a copy of Mulan PSL v2 at:
#    http://license.coscl.org.cn/MulanPSL2
#THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR
#IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR
#PURPOSE.
#See the Mulan PSL v2 for more details.

[OS]
name=OS
baseurl=http://repo.huaweicloud.com/openeuler/openEuler-20.03-LTS-SP4/OS/$basearch/
metalink=https://mirrors.openeuler.org/metalink?repo=$releasever/OS&arch=$basearch
metadata_expire=1h
enabled=1
gpgcheck=1
gpgkey=http://repo.huaweicloud.com/openeuler/openEuler-20.03-LTS-SP4/OS/$basearch/RPM-GPG-KEY-openEuler

[everything]
name=everything
baseurl=http://repo.huaweicloud.com/openeuler/openEuler-20.03-LTS-SP4/everything/$basearch/
metalink=https://mirrors.openeuler.org/metalink?repo=$releasever/everything&arch=$basearch
metadata_expire=1h
enabled=1
gpgcheck=1
gpgkey=http://repo.huaweicloud.com/openeuler/openEuler-20.03-LTS-SP4/everything/$basearch/RPM-GPG-KEY-openEuler

[EPOL]
name=EPOL
baseurl=http://repo.huaweicloud.com/openeuler/openEuler-20.03-LTS-SP4/EPOL/main/$basearch/
metalink=https://mirrors.openeuler.org/metalink?repo=$releasever/EPOL/main&arch=$basearch
metadata_expire=1h
enabled=1
gpgcheck=1
gpgkey=http://repo.huaweicloud.com/openeuler/openEuler-20.03-LTS-SP4/OS/$basearch/RPM-GPG-KEY-openEuler

[debuginfo]
name=debuginfo
baseurl=http://repo.huaweicloud.com/openeuler/openEuler-20.03-LTS-SP4/debuginfo/$basearch/
metalink=https://mirrors.openeuler.org/metalink?repo=$releasever/debuginfo&arch=$basearch
metadata_expire=1h
enabled=1
gpgcheck=1
gpgkey=http://repo.huaweicloud.com/openeuler/openEuler-20.03-LTS-SP4/debuginfo/$basearch/RPM-GPG-KEY-openEuler

[source]
name=source
baseurl=http://repo.huaweicloud.com/openeuler/openEuler-20.03-LTS-SP4/source/
metalink=https://mirrors.openeuler.org/metalink?repo=$releasever&arch=source
metadata_expire=1h
enabled=1
gpgcheck=1
gpgkey=http://repo.huaweicloud.com/openeuler/openEuler-20.03-LTS-SP4/source/RPM-GPG-KEY-openEuler

[update]
name=update
baseurl=http://repo.huaweicloud.com/openeuler/openEuler-20.03-LTS-SP4/update/$basearch/
metalink=https://mirrors.openeuler.org/metalink?repo=$releasever/update&arch=$basearch
metadata_expire=1h
enabled=1
gpgcheck=1
gpgkey=http://repo.huaweicloud.com/openeuler/openEuler-20.03-LTS-SP4/OS/$basearch/RPM-GPG-KEY-openEuler

[update-source]
name=update-source
baseurl=http://repo.huaweicloud.com/openeuler/openEuler-20.03-LTS-SP4/update/source/
metalink=https://mirrors.openeuler.org/metalink?repo=$releasever/update&arch=source
metadata_expire=1h
enabled=1
gpgcheck=1
gpgkey=http://repo.huaweicloud.com/openeuler/openEuler-20.03-LTS-SP4/source/RPM-GPG-KEY-openEuler

[centos-extras]
name=Centos extras - $basearch
baseurl=http://mirror.centos.org/centos/7/extras/x86_64
enabled=1
gpgcheck=1
gpgkey=http://centos.org/keys/RPM-GPG-KEY-CentOS-7

安装Docker引擎：
sudo yum install docker-ce -y

启动Docker&开机自启动服务：
sudo systemctl start docker
systemctl enable docker.service

确认Docker已成功安装：

docker --version