How to install and setup container with Docker and Portainer.io UI on CentOS 7.
STEP 1- we update list of all package updates from repositories.
sudo yum check-update
STEP 2- Download script from get.docker.com and run it.
curl -fsSL get.docker.com -o get-docker.sh
sudo sh get-docker.sh
STEP 3- If you want to use docker with non-root user, add your user to “docker” group
sudo usermod -aG docker root
STEP 4- Start Docker daemon
sudo systemctl start docker
STEP 5- Docker start automatically on reboots
sudo systemctl enable docker
STEP 6- Create docker volume for portainer.io data
docker volume create portainer_data
STEP 7- We will install Portainer.io. With this command Docker pulls latest image from repository and creates portainer.io service listening port 9000 with restart policy that starts container if state is any other than running
docker run -d --restart unless-stopped -p 9000:9000 -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data portainer/portainer
IP-address http://:9000 and create admin password
Thats it 
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