AlmaLinux dockerをインストールするまでの手順

sudo dnf config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

dnf repolist

<出力結果>
repo id                                                                         repo の名前
appstream                                                                       AlmaLinux 8 - AppStream
baseos                                                                          AlmaLinux 8 - BaseOS
docker-ce-stable                                                                Docker CE Stable - x86_64
extras                                                                          AlmaLinux 8 - Extras
powertools                                                                      AlmaLinux 8 - PowerTools

sudo dnf -y install docker-ce

<出力結果>
エラー:
 問題: package docker-ce-3:19.03.3-3.el7.x86_64 requires containerd.io >= 1.2.2-3, but none of the providers can be installed
  - cannot install the best candidate for the job
  - package containerd.io-1.2.10-3.2.el7.x86_64 is excluded
  - package containerd.io-1.2.2-3.3.el7.x86_64 is excluded
  - package containerd.io-1.2.2-3.el7.x86_64 is excluded
  - package containerd.io-1.2.4-3.1.el7.x86_64 is excluded
  - package containerd.io-1.2.5-3.1.el7.x86_64 is excluded
  - package containerd.io-1.2.6-3.3.el7.x86_64 is excluded
(try to add '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages)

wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/containerd.io-1.2.2-3.3.el7.x86_64.rpm
sudo dnf remove containerd.io
sudo dnf install containerd.io-1.2.2-3.3.el7.x86_64.rpm
sudo dnf install -y docker-ce docker-ce-cli --nobest

docker --version

<出力結果>
Docker version 20.10.5, build 55c4c88

sudo systemctl enable docker
sudo systemctl start docker

sudo usermod -aG docker ${USER}

sudo systemctl restart docker

docker info

<出力結果>
Server:
ERROR: Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.24/info: dial unix /var/run/docker.sock: connect: permission denied
errors pretty printing info

docker run hello-world

<出力結果>
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
b8dfde127a29: Pull complete 
Digest: sha256:308866a43596e83578c7dfa15e27a73011bdd402185a84c5cd7f32a88b501a24
Status: Downloaded newer image for hello-world:latest

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (amd64)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/get-started/

docker rm $(docker ps -q -a)

<出力結果>
f422a43ab5a5

docker rmi $(docker images -q)

<出力結果>
Untagged: hello-world:latest
Untagged: hello-world@sha256:308866a43596e83578c7dfa15e27a73011bdd402185a84c5cd7f32a88b501a24
Deleted: sha256:d1165f2212346b2bab48cb01c1e39ee8ad1be46b87873d9ca7a4e434980a7726
Deleted: sha256:f22b99068db93900abe17f7f5e09ec775c2826ecfe9db961fea68293744144bd

sudo wget -O /usr/local/bin/docker-compose https://github.com/docker/compose/releases/download/1.29.0/docker-compose-Linux-x86_64

sudo chmod +x /usr/local/bin/docker-compose

docker-compose version

<出力結果>
docker-compose version 1.29.0, build 07737305
docker-py version: 5.0.0
CPython version: 3.7.10
OpenSSL version: OpenSSL 1.1.0l  10 Sep 2019