Editing Docker Installation

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= Docker Community Edition install =
This installs the official Docker distrubution from the '''community edition''' repository.

== Fedora ==
The docker team officially supports Fedora, but the rapid pace of Fedora releases (every 6 months) and the changing cgroups support (fedora has moved to v2 but docker is still on v1) has led to delays with the Fedora 33 release of docker-ce.  I expect this will happen again for future releases, so the instructions below accommodate this possibility.

=== Prerequisites ===
* [[Basic Fedora 31+ Installation]]
* [[CUDA + NVIDIA drivers]] (if GPU is present)

=== Set up Docker-CE Repository ===
 sudo dnf config-manager --add-repo <nowiki>https://download.docker.com/linux/centos/docker-ce.repo</nowiki>
 dnf list docker\*

If you don't see the '''docker-ce*''' packages in the listing, you need to enable the test repository (CAUTION):
 sudo dnf config-manager --set-enabled docker-ce-test

Then you install the packages
 sudo dnf install docker-ce docker-ce-cli containerd.io

== CentOS ==
( originally from https://docs.docker.com/engine/installation/linux/centos/ )

=== Prerequisites ===
* [[Basic CentOS 7 Installation]]
* [[CUDA + NVIDIA drivers]] (if GPU is present)

=== Set up Docker-CE Repository ===
 sudo yum install -y yum-utils device-mapper-persistent-data lvm2
 sudo yum-config-manager --add-repo <nowiki>https://download.docker.com/linux/centos/docker-ce.repo</nowiki>

=== Install Docker ===
 sudo yum install -y docker-ce docker-ce-cli containerd.io

== Debian ==
( originally from https://docs.docker.com/engine/installation/linux/debian/ )

=== Prerequisites ===
* [[Basic Debian Installation]]

=== Set up Docker-CE Repository ===
 sudo apt-get install -y apt-transport-https ca-certificates curl gnupg2 software-properties-common
 curl -fsSL <nowiki>https://download.docker.com/linux/debian/gpg</nowiki> | sudo apt-key add -
 sudo add-apt-repository "deb [arch=amd64] <nowiki>https://download.docker.com/linux/debian</nowiki> $(lsb_release -cs) stable"
 sudo apt-get update

=== Install Docker ===
 sudo apt-get install -y docker-ce docker-ce-cli containerd.io

== Finishing the Install ==
Make sure the docker daemon is running and set up to start automatically (should already be done by the package install):
 sudo systemctl enable --now docker

Test installation
 sudo docker run --rm hello-world
 sudo docker image rm -f hello-world

Enable standard user access to docker commands (requires $USER to log out and back in to activate)
 sudo groupadd docker
 sudo usermod -aG docker $USER

In order to access the local repositories, we need to copy the certs into the local docker config
 sudo scp -r aslan:/etc/docker/certs.d /etc/docker

Copy over the .docker directory from aslan for both root and user(s) to get login credentials
 sudo scp -r aslan:.docker /root
 scp -r aslan:.docker ~ 

= GPU Nodes =
On GPU-enabled nodes, install the [[NVIDIA Docker Runtime]].