Install Docker for Kubernetes on CentOS

Container runtimes is required for Kubernetes to work , one of the popular container runtime is docker. This tutorial will guide you how we can install docker for Kubernetes on CentOS.

Step 1: Install required packages for Docker

[~]# yum install yum-utils device-mapper-persistent-data lvm2 -y

Step 2: Add Docker repository for installation

[~]# yum-config-manager \
  --add-repo \
  https://download.docker.com/linux/centos/docker-ce.repo

Step 3: Install Docker CE engine

[~]# yum update && yum install docker-ce-18.06.2.ce -y

Step 4: Create /etc/docker directory for Docker

[~]# mkdir /etc/docker

Step 5: Setup Docker daemon

[~]#  cat > /etc/docker/daemon.json <<EOF
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "100m"
  },
  "storage-driver": "overlay2",
  "storage-opts": [
    "overlay2.override_kernel_check=true"
  ]
}
EOF

[~]# mkdir -p /etc/systemd/system/docker.service.d

Step 6: Start and enable Docker daemon

[~]# systemctl daemon-reload
[~]#  systemctl restart docker

Reference: https://docs.docker.com/install/

How to Install Kubernetes Cluster on CentOS [Updated]