- Who we are
- What we know
- What we've created
- Hints and Kinks
- Checking Corosync cluster membership
- Configuring radosgw to behave like Amazon S3
- Downgrading to DRBD 8.3
- Fencing in Libvirt/KVM virtualized cluster nodes
- Fencing in VMware virtualized Pacemaker nodes
- GFS2 in Pacemaker (Debian/Ubuntu)
- Interleaving in Pacemaker clones
- Maintenance in active Pacemaker clusters
- Managing cron jobs with Pacemaker
- Mandatory and advisory ordering in Pacemaker
- Migrating virtual machines from block-based storage to RADOS/Ceph
- Network connectivity check in Pacemaker
- OCFS2 in Pacemaker (Debian/Ubuntu)
- Solid-state drives and Ceph OSD journals
- Solve a DRBD split-brain in 4 steps
- Testing Pacemaker clusters
- Totem "Retransmit List" in Corosync
- Turning Ceph RBD Images into SAN Storage Devices
- Which OSD stores a specific RADOS object?
- Presentations
- Die eigene Cloud mit OpenStack Essex (German, LinuxTag 2012)
- Fencing (LCE 2011)
- GlusterFS in HA Clusters (LCEU 2012)
- GlusterFS und Ceph (German, CeBIT 2012)
- Hands-On With Ceph (LCEU 2012)
- High Availability Update (OpenStack Summit Fall 2012)
- High Availability in OpenStack (CloudOpen 2012)
- High Availability in OpenStack (OpenStack Conference Spring 2012)
- Highly Available Cloud: Pacemaker integration with OpenStack (OSCON 2012)
- Mit OpenStack zur eigenen Cloud (German, CLT 2012)
- Mit OpenStack zur eigenen Cloud (German, OSDC 2012)
- More Reliable, More Resilient, More Redundant (OpenStack Summit April 2013)
- MySQL HA Deep Dive (MySQL Conference 2012)
- MySQL High Availability Deep Dive (PLUK 2012)
- MySQL High Availability Sprint (PLUK 2011)
- OpenStack Essex im Praxistest (German, Linuxwochen Wien 2012)
- OpenStack High Availability Update (Grizzly and Havana)
- Roll Your Own Cloud (LCA 2011)
- Storage Replication in HPHA (LCA 2012)
- Zen of Pacemaker (LCA 2012)
- Technical documentation
- News releases
- Hints and Kinks
- What we do
- What we charge
- What others say

Home › Who we are ›
Florian Haas
Drawing from a decade of experience in open source technology, Florian is among the most renowned open-source high availability experts in the world. He has worked with customers of all sizes and markets, and is a frequent and highly sought-after conference speaker. A key contributor to the open- source high availability community, he maintains the Linux-HA User’s Guide and other technical documentation. He was also the original author of the DRBD User's Guide, a role he has since resigned.
Prior to co-founding hastexo, Florian wore many hats at Linbit, where together with Martin and Andreas he formed the core of the professional services team. Also jointly with Martin, he enabled Linbit to build an excellent curriculum for high availability training, and delivered classes frequently. And as the manager overseeing all of Linbit’s partner relationships, his friendly and professional style impressed many of his collaborators.
Florian has spoken at LinuxCon, linux.conf.au, LinuxTag, the MySQL User’s Conference & Expo, and many other conferences and events. Even in his CEO role, Florian continues to devote time to the open-source high availability community, and he can be frequently found on the Freenode IRC channels #drbd, #linux-ha and #linux- cluster. His IRC nick is fghaas.
