[Basic] OpenStack Installation

Basic Installation Procedure for CentOS based OpenStack

Before we use packstack or any other commands, we need to have our OpenStack's repos and requirements set properly. Otherwise, we have to roll back our OpenStack environment, which is very painful.

0. Tips

1. If your dnf is too slow, try adding add max_parallel_downloads=10 and fastestmirror=true to /etc/dnf/dnf.conf.

2. If your OpenStack failed, just wipe out the OS and reinstall everything. I would suggest using ESXi or some other virtual devices which supports snapshots before diving into real physical devices and running with USBs with OS image.

1. Install Dependencies and Packages

sudo dnf update -y
sudo dnf install -y centos-release-openstack-yoga  # or zed or anything else
sudo setenforce 0
sudo dnf config-manager --enable powertools  # need this for future use
sudo dnf install -y openstack-packstack
sudo dnf update -y

With some CentOS releases, without powertools, we are not even able to install centos-release-openstack-zed or some other packages. Also, even if you have managed to install yoga in your environment, not having powertools will result in failure of installation:

For example, following error will happen due to dnf install -y openstack-glance failing due to not having proper repository:

Problem: package openstack-glance-1:24.2.0-1.el8.noarch requires python3-glance = 1:24.2.0-1.el8, but none of the providers can be installed
  - cannot install the best candidate for the job
  - nothing provides python3-pyxattr needed by python3-glance-1:24.2.0-1.el8.noarch

Also, do not forget to setenforce 0 if you would not want any more headache.

When you have followed all commands, check if packages are actually able to be installed. Check this using sudo dnf install openstack-glance. If this fails, it means that the repositories were not set properly and PackStack will eventually fail in the future when applying puppet.