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docker

README.md

Docker guidelines

See also kubernetes guidelines

Install Docker on Ubuntu 20.04

sudo apt install -y docker.io
sudo apt install -y docker-compose
sudo systemctl enable --now docker
sudo usermod -aG docker ${USER}
sudo systemctl start docker

Install Docker on Centos 8

sudo yum update -y
sudo yum install -y yum-utils
sudo yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo
sudo yum remove -y runc
sudo yum install -y docker-ce docker-ce-cli containerd.io
sudo systemctl enable docker
sudo systemctl start docker

curl -L "https://github.com/docker/compose/releases/download/1.27.4/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
chmod +x /usr/local/bin/docker-compose

Install Docker on Rocky Linux 8

sudo yum update -y
sudo yum install -y yum-utils
sudo yum-config-manager \
  --add-repo \
  https://download.docker.com/linux/centos/docker-ce.repo
sudo yum install -y docker-ce docker-ce-cli containerd.io
sudo systemctl enable docker
sudo systemctl start docker

Install additional tools

  • dive - explore docker images in console.

Build Docker image for x86_64 and ARM64

export REPOSITORY=jurajveverka
export IMAGE_NAME=docker-example
export VERSION=1.0.0
 
# on x86 AMD64 device:
docker build -t ${REPOSITORY}/${IMAGE_NAME}:${VERSION}-amd64 --build-arg ARCH=amd64 --file ./Dockerfile . 
docker push ${REPOSITORY}/${IMAGE_NAME}:${VERSION}-amd64

# on ARM64 v8 device (RPi4 64bit OS):
docker build -t ${REPOSITORY}/${IMAGE_NAME}:${VERSION}-arm64v8 --build-arg ARCH=arm64v8 --file ./Dockerfile . 
docker push ${REPOSITORY}/${IMAGE_NAME}:${VERSION}-arm64v8

# on x86 AMD64 device: 
docker manifest create \
${REPOSITORY}/${IMAGE_NAME}:${VERSION} \
--amend ${REPOSITORY}/${IMAGE_NAME}:${VERSION}-amd64 \
--amend ${REPOSITORY}/${IMAGE_NAME}:${VERSION}-arm64v8

docker manifest push ${REPOSITORY}/${IMAGE_NAME}:${VERSION}

Uninstall Docker Ubuntu 20.04

sudo apt purge -y docker.io
sudo apt purge -y docker-compose
sudo apt autoremove

Remote access

useradd dockeradmin
usermod -aG docker dockeradmin

docker context create my-remote-docker-machine --docker "host=ssh://dockeradmin@host:port"
docker context ls
docker context use my-remote-docker-machine

References