...
More info: https://docs.openstack.org/octavia/latest/reference/introduction.html
HAProxy
...
Swift
The OpenStack object & blob storage component.
More info: https://docs.openstack.org/octaviaswift/latest/contributor/api/haproxy-amphora-api.html
Galera
A clustering service for MySQL and MariaDB used for high availability of databases
Ceph
An open source software defined storage platform.
More info: https://galeracluster.com/, https://mariadbwww.redhat.com/kbsysadmin/en/whatopenstack-is-mariadb-galera-cluster/
RabbitMQ
A messaging queue technology used for intra service communication. OpenStack uses this to coordinate operations and status information among its services.
More info: https://www.rabbitmq.com/, https://docs.openstack.org/nova/queens/reference/rpc.htmlceph-storage
Sirius
A Ceph cluster used for storage of virtual disks created for c flavour VMs and for created volumes.
Arided
A Ceph cluster that will be used to provide storage for Manilla.
Echo
A Ceph cluster object store that will be used to provide storage for Swift.