vi /etc/yum.repo.d/docker-ce.repo

------------------------------------------------------------------------

[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-edge]

name=Docker CE Edge - $basearch

baseurl=https://download.docker.com/linux/centos/7/$basearch/edge

enabled=0

gpgcheck=1

gpgkey=https://download.docker.com/linux/centos/gpg

[docker-ce-edge-debuginfo]

name=Docker CE Edge - Debuginfo $basearch

baseurl=https://download.docker.com/linux/centos/7/debug-$basearch/edge

enabled=0

gpgcheck=1

gpgkey=https://download.docker.com/linux/centos/gpg

[docker-ce-edge-source]

name=Docker CE Edge - Sources

baseurl=https://download.docker.com/linux/centos/7/source/edge

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/7/source/nightly

enabled=0

gpgcheck=1

gpgkey=https://download.docker.com/linux/centos/gpg

----------------------------------------------------------------------------

转自官方：https://download.docker.com/linux/centos/

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