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16 - Install and configure Horizon on the controller node

This post explains how to install and configure the Horizon web dashboard on the controller node (controller01). Install required packages sudo apt update sudo apt install -y openstack-dashboard Edit Horizon main configuration Edit /etc/openstack-dashboard/local_settings.py and ensure the following lines are set. Use sudo with vim or nano if preferred. sudo nano /etc/openstack-dashboard/local_settings.py Key entries: OPENSTACK_HOST = "controller01" SESSION_ENGINE = 'django.contrib.sessions.backends.cache' CACHES = { 'default': { 'BACKEND': 'django.core.cache.backends.memcached.PyMemcacheCache', 'LOCATION': 'controller01:11211', } } OPENSTACK_KEYSTONE_URL = "http://%s:5000/v3" % OPENSTACK_HOST OPENSTACK_KEYSTONE_MULTIDOMAIN_SUPPORT = True OPENSTACK_API_VERSIONS = { "identity": 3, "image": 2, "volume": 3, } OPENSTACK_KEYSTONE_DEFAULT_DOMAIN = "Default" OPENSTACK_KEYSTONE_DEFAULT_ROLE = "user" Note: change volume: 2 to volume: 3 because we use Cinder v3 endpoints. If you prefer v2, set OPENSTACK_API_VERSIONS['volume'] = 2.

Sunday, November 23, 2025 | 2 minutes Read
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17 - Installing OpenStack using kolla-ansible on virtual machines

Up to now we installed OpenStack manually, configuring each step one by one. Now we jump to automation with Ansible, which lets you run deployments with almost no human intervention. The idea is simple: define your settings in a few files and Ansible runs the whole process unattended. These files can be versioned in Git so you can repeat or tweak deployments later. Ansible simplifies OpenStack by concentrating most settings in a handful of files with sensible defaults, valid for both simple environments and more complex ones (multi-node, clustering, advanced networking, etc.).

Sunday, November 23, 2025 | 18 minutes Read