- 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 charge
- What others say
Pacemaker is the state of the art cluster resource manager for Linux and the Linux-HA stack. It constitutes the "upper" half of a cluster infrastructure (the "lower" half is the cluster communications layer, such as Heartbeat or Corosync).
We're proud to have been an integral part of the Pacemaker community since its beginning. Florian is the leading person behind resource agents like the one for virtual domains (ocf:heartbeat:VirtualDomain) and has contributed many other patches and bugfixes. He also frequently presents Pacemaker tutorials at open-source conferences. Martin has made himself a name as maintainer of the Pacemaker-based cluster stack for Debian GNU/Linux, and has devised a full training curriculum around Pacemaker. Andreas is one of the most well-versed Pacemaker specialists in the world.
Long story short: If you need Pacemaker support, we'll be here to help.
What's it good for?
Pacemaker controls, manages and recovers cluster resources. A resource can be anything from a virtual IP address, to a cluster managed filesystem, to a complex application.
Pacemaker's controls resources on cluster nodes through resource agents. Resource agents exist for virtually any application; even old-fashioned LSB init scripts can serve as resource agents if they support the start, stop and status operations.
Pacemaker has an internal policy mechanism that allows for seamless creation of highly complex setups with many dependencies between individual resources. With Pacemaker, you have fine grained control over
- what resources
- should run where
- in which order
- under what circumstances
- at what time.
Pacemaker is, by far, the most powerful cluster resource manager in existence for the Linux platform. It is the standard cluster resource manager in SLES, Ubuntu, and Debian GNU/Linux, and is expected to replace Red Hat Cluster in future RHEL versions.
I'm on legacy Heartbeat. Can I migrate?
You can, and indeed you should. The legacy Heartbeat "haresources" cluster resource framework is no longer supported by the upstream developers. We can assist you in the migration.
I'm on CMAN. Can I migrate?
Yes, although you should check with your distro vendor regarding your support status. We can assist you in the migration.
Whatever Pacemaker related question you have, we can answer it. We can offer a wide array of Pacemaker consulting services. Need help quickly? Ask The Expert Now!