Docker Installation Guide

This guide describes how to install Docker (or Podman) to run Check NetAppPRO on various operating systems. If it is already installed please skip this page.

CentOS 7

Install podman and enable user namespaces:

# yum install podman
# echo 10000 > /proc/sys/user/max_user_namespaces

CentOS 8

Install podman:

# dnf install podman

Ubuntu (16.04, 18.04, 19.10)


  • Ensure no other versions of Docker are installed

    • apt-get remove docker docker-engine containerd runc
  • Update the apt package Index and install some packages which are needed for further steps

    • apt-get update
    • apt-get install apt-transport-https ca-certificates curl gnupg-agent software-properties-common
  • Add Docker’s GPG Key

    • curl -fsSL | sudo apt-key add -
  • You can check the Docker GPG fingerprint via

    • apt-key fingerprint 0EBFCD88
    • and should be verified with the fingerprint 9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF
  • Add the Docker repository for stable releases for your specfic Ubuntu Version

    add-apt-repository \
    "deb [arch=amd64] \
    $(lsb_release -cs) \
  • Update and install the packages

    • apt-get update
    • apt-get install docker-ce docker-ce-cli
  • Add nagios user to docker group

    • usermod -aG docker nagios
  • And test your installation

    • docker run hello-world