Docker CE
- Install
yum-utils
, which provides theyum-config-manager
utility:$ sudo yum install -y yum-utils
- Use the following command to set up the stable repository:
$ sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
- Optional: Enable the edge repository. This repository is included in the
docker.repo
file above but is disabled by default. You can enable it alongside the stable repository.$ sudo yum-config-manager --enable docker-ce-edge
You can disable the edge repository by running the
yum-config-manager
command with the--disable
flag. To re-enable it, use the--enable
flag. The following command disables the edge repository.$ sudo yum-config-manager --disable docker-ce-edge
INSTALL DOCKER
- Update the
yum
package index.$ sudo yum makecache fast
If this is the first time you have refreshed the package index since adding the Docker repositories, you will be prompted to accept the GPG key, and the key’s fingerprint will be shown. Verify that the fingerprint is correct, and if so, accept the key.
Docker Edition Fingerprint Docker CE 060A 61C5 1B55 8A7F 742B 77AA C52F EB6B 621E 9F35
Docker EE DD91 1E99 5A64 A202 E859 07D6 BC14 F10B 6D08 5F96
- Install the latest version of Docker, or go to the next step to install a specific version.
Docker Edition Command Docker CE sudo yum install docker-ce
Docker EE sudo yum install docker-ee
Warning: If you have multiple Docker repositories enabled, installing or updating without specifying a version in the
yum install
oryum update
command will always install the highest possible version, which may not be appropriate for your stability needs. - On production systems, you should install a specific version of Docker instead of always using the latest. List the available versions. This example uses the
sort -r
command to sort the results by version number, highest to lowest, and is truncated.
Note: This
yum list
command only shows binary packages. To show source packages as well, omit the.x86_64
from the package name.$ yum list docker-ce.x86_64 --showduplicates |sort -r docker-ce.x86_64 17.03.0.el7 docker-ce-stable
The contents of the list depend upon which repositories are enabled, and will be specific to your version of CentOS (indicated by the
.el7
suffix on the version, in this example). Choose a specific version to install. The second column is the version string. The third column is the repository name, which indicates which repository the package is from and by extension its stability level. To install a specific version, append the version string to the package name and separate them by a hyphen (-
):Docker Edition Command Docker CE sudo yum install docker-ce-<VERSION>
Docker EE sudo yum install docker-ee-<VERSION>
- Start Docker.
$ sudo systemctl start docker
- Verify that
docker
is installed correctly by running thehello-world
image.$ sudo docker run hello-world
This command downloads a test image and runs it in a container. When the container runs, it prints an informational message and exits.