# OpenStack FAQ

> Frequently asked questions powered by OpenStack FAQ. Content is published under the site's terms — use as context or training input is allowed per /robots.txt Content-signal.

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## Topics

- [Architecture & Reference](https://www.openstackfaq.com/en/topic/architecture-reference/): 2 articles
- [Block Storage (Cinder)](https://www.openstackfaq.com/en/topic/block-storage-cinder/): 1 articles
- [Ceph Storage](https://www.openstackfaq.com/en/topic/storage-ceph/): 2 articles
- [Compute (Nova)](https://www.openstackfaq.com/en/topic/compute-nova/): 2 articles
- [Deploy: DevStack / PoC](https://www.openstackfaq.com/en/topic/deploy-devstack/): 3 articles
- [Deploy: Kolla-Ansible](https://www.openstackfaq.com/en/topic/deploy-kolla/): 1 articles
- [Deploy: OpenStack-Ansible](https://www.openstackfaq.com/en/topic/deploy-ansible/): 3 articles
- [Identity (Keystone)](https://www.openstackfaq.com/en/topic/identity-keystone/): 1 articles
- [Image (Glance)](https://www.openstackfaq.com/en/topic/image-glance/): 1 articles
- [Networking (Neutron)](https://www.openstackfaq.com/en/topic/networking-neutron/): 5 articles

## Articles

Each article is available as Markdown by appending `.md` or sending `Accept: text/markdown`.

- [Ceph Setup Ubuntu Three Node](https://www.openstackfaq.com/en/ceph-setup-ubuntu-three-node/): Step-by-step guide to deploying a three-node Ceph cluster on Ubuntu 22.04 using cephadm for high-availability storage.
- [Cinder Multiple Backends](https://www.openstackfaq.com/en/cinder-multiple-backends/): Configure multiple Cinder storage backends by editing cinder.conf, creating volume types, and mapping them to specific drivers.
- [OpenStack Add Direct Attached DHCP IPs](https://www.openstackfaq.com/en/openstack-add-direct-attached-dhcp-ip/): Configure OpenStack Neutron to assign direct-attached DHCP IPs to instances on flat or VLAN provider networks.
- [OpenStack Add Floating IPs](https://www.openstackfaq.com/en/openstack-add-floating-ips/): Learn to allocate, associate, and manage OpenStack floating IPs using CLI commands for external network access.
- [OpenStack Add Images to Glance](https://www.openstackfaq.com/en/openstack-add-images-to-glance/): Learn to upload, configure, and manage cloud images in OpenStack Glance using CLI commands for local files and URLs.
- [OpenStack Add Project and Users](https://www.openstackfaq.com/en/openstack-add-project-and-users/): Step-by-step CLI guide to create OpenStack projects, users, roles, quotas, and access files.
- [OpenStack Affinity and Anti-Affinity](https://www.openstackfaq.com/en/openstack-affinity-and-anti-affinity/): Configure OpenStack server groups with affinity and anti-affinity policies to control instance placement across compute hosts using CLI commands.
- [OpenStack and Ceph](https://www.openstackfaq.com/en/openstack-and-ceph/): Step-by-step guide to integrating Ceph storage with OpenStack 2024.2 for Glance, Cinder, and Nova services.
- [OpenStack Ansible Ceph](https://www.openstackfaq.com/en/openstack-ansible-ceph/): Configure OpenStack Ansible to use external Ceph storage for Glance, Cinder, and Nova by setting up pools, keyrings, and deployment variables.
- [OpenStack Ansible Managed Ceph](https://www.openstackfaq.com/en/openstack-ansible-managed-ceph/): Deploy and manage Ceph clusters with OpenStack Ansible using YAML configurations and dedicated playbooks.
- [OpenStack Ansible with OpenVSwitch](https://www.openstackfaq.com/en/openstack-ansible-with-openvswitch/): Deploy OpenStack 2024.2 with Open vSwitch using Ansible by cloning the repo, configuring YAML network bridges, and running setup playbooks.
- [OpenStack Dev Server Setup CentOS](https://www.openstackfaq.com/en/openstack-dev-server-setup-centos/): Step-by-step guide to installing and configuring DevStack on CentOS Stream 9 for OpenStack 2024.2 development.
- [OpenStack Dev Server Setup Ubuntu](https://www.openstackfaq.com/en/openstack-dev-server-setup-ubuntu/): Step-by-step guide to setting up an OpenStack 2024.2 development environment on Ubuntu 22.04 using DevStack for testing and contribution.
- [OpenStack Kolla All in One](https://www.openstackfaq.com/en/openstack-kolla-all-in-one/): Deploy OpenStack 2024.2 on a single Ubuntu host using Kolla-Ansible with step-by-step commands for setup, configuration, and management.
- [OpenStack Liberty Private Cloud HowTo](https://www.openstackfaq.com/en/openstack-liberty-private-cloud-howto/): Deploy a new OpenStack Dalmatian cloud and migrate Liberty workloads via parallel export/import of images, instances, and volumes.
- [OpenStack Migrate Routers and DHCP](https://www.openstackfaq.com/en/openstack-migrate-routers-and-dhcp/): Migrate OpenStack L3 routers and DHCP agents between nodes using CLI commands or an automated drain script.
- [OpenStack Octavia with SSL](https://www.openstackfaq.com/en/openstack-octavia/): Deploy OpenStack Octavia with SSL termination using Barbican for certificate management and HTTPS load balancing.
- [OpenStack Private Cloud Architecture](https://www.openstackfaq.com/en/openstack-private-cloud-architecture/): Deploy a high-availability OpenStack 2024.2 private cloud with 3-node control plane, spine-leaf networking, and Ceph storage using Kolla-Ansible.
- [OpenStack Setup All in One](https://www.openstackfaq.com/en/openstack-setup-all-in-one/): Deploy OpenStack 2024.2 on a single Ubuntu server using DevStack with step-by-step commands for setup, verification, and management.
- [OpenStack Stacking vs Spreading](https://www.openstackfaq.com/en/openstack-stacking-vs-spreading/): Configure OpenStack scheduler weights and overcommit ratios to choose between stacking VMs for density or spreading them for isolation.
- [OpenStack VXLAN](https://www.openstackfaq.com/en/openstack-vxlan/): Configure OpenStack VXLAN by editing ML2 and OVS agent configs, setting MTU, and restarting services to enable isolated tenant networks.