- 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?
- 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
Virtualization is a key component of any contemporary infrastructure. And unfortunately, it multiplies the effects of hardware outages: if a physical server fails, then this affects multiple virtual machines and service. When talking about virtualization, it's thus crucial to also talk about High Availability.
We have a long history of developing and implementing virtualization with DRBD and Pacemaker. Florian published the first resource agent that could control the libvirt virtualization framework from of Pacemaker. Thousands of people have heard our presentations on virtualization with DRBD and iSCSI. If you want highly-available virtualization, we will be happy to assist.
How do I get started?
Numerous virtualization solutions and frameworks for Linux exist. If you like to get started quickly, installing a standard Linux distribution on two servers and running KVM or XEN on top if this will be sufficient. In such setups, DRBD allows you to replicate the VMs' data between your servers and Pacemaker will make sure that all needed VMs are running.
We'd be happy to assist you in setting up shop. Based on our multi-year experience, we can get you going in a day or less.
What if I need something more scalable?
This is where enterprise cloud configurations come in. In typical setups, we'll set up two standard servers with loads of diskspace. We'll configure DRBD and Pacemaker, and set up iSCSI to export the server's data to your hypervisor hosts. These run your virtual machines, and are standard, off-the-shelf servers, too. A future-proof investment with practically unlimited scalability.
We can assist you in planning and deploying enterprise clouds, from initial concept to installation, testing and acceptance.
I want something ultra light weight. What do I do?
We build our virtualization solutions on pluggable free and open source software (F/OSS) components. If you prefer container-based virtual environments like OpenVZ, Linux Containers or Linux-VServer, all we do is swap out one component for another.
Give us a call, we can help!
What if I prefer VMware or XenServer?
Do you plan to go virtual but don't know how? Or is your existing virtualization setup causing you headache? We can provide expert consulting services around virtualization. Ask The Expert Now!