Setting up a custom CentOS Docker image

Fetch/Update the CentOS official image,

docker pull centos

And prepare your custom image based on it,

mkdir -p ~/images/centos/upload/
cd ~/images/centos/
wget http://pub.nethence.com/bin/docker/centos/Dockerfile
for f in *.txt; mv $f ${f%\.txt}; done; unset f
cd upload/
wget http://pub.nethence.com/bin/docker/centos/upload/fakeinit.bash
wget http://pub.nethence.com/bin/docker/centos/upload/install.bash
for f in *.txt; mv $f ${f%\.txt}; done; unset f
chmod +x *
cd ..

docker build -t custom/centos .