Damian Bulira

OpenStack Tech Lead, Consultant and Trainer. With OpenStack since 2015.

Blog Posts

Recent Posts

Deep dive into cloud-init: instance customization and metadata delivery in OpenStack

39 minute read

Comprehensive guide to cloud-init in OpenStack: understand metadata delivery through Config Drive and Metadata Service (169.254.169.254), ML2/OVN network architecture with namespace isolation, four boot stages (local, network, config, final), module execution frequencies, and debugging techniques for troubleshooting. Includes practical examples for Linux and Windows instances using cloud-config, shell scripts, and MIME multi-part formats.

Block storage in OpenStack: operator’s guide to Nova and Cinder

38 minute read

Complete OpenStack storage guide covering OpenStack Cinder and block storage in OpenStack. Master Cinder storage backends with OpenStack Ceph RBD and OpenStack iSCSI, configure volume types for storage tiers, implement QoS and encryption, manage snapshots and backups in production.