What is STONITH pacemaker?
In a Pacemaker cluster, the implementation of node level fencing is STONITH (Shoot The Other Node in the Head). The High Availability Extension includes the stonith command line tool, an extensible interface for remotely powering down a node in the cluster.
What is Fence_xvm?
Description. fence_virt and fence_xvm are an I/O Fencing agents which can be used with virtual machines. Fence_xvm is backward compatible with fence_xvmd. Fence_virt and fence_xvm talk to fence_virtd, which supports multiple backend plugins, including: – libvirt for single-node operation.
What is VM fence?
A node fence (or I/O fence) is a virtual “fence” that separates nodes which must not have access to a shared resource from that resource. It may separate an active node from its backup. If the backup crosses the fence and, for example, tries to control the same disk array as the primary, a data hazard may occur.
How do you enable STONITH in a Pacemaker?
Enable STONITH for your HA topology.
- Enable the cluster STONITH property by using the following command. $ pcs property set stonith-enabled=true.
- Update the environment for your deployment to set the ibm-openstack. ha. pacemaker. properties. stonith-enabled. value property to true .
What is Linux cluster fencing?
Fencing is the disconnection of a node from the cluster’s shared storage. Fencing cuts off I/O from shared storage, thus ensuring data integrity. The cluster infrastructure performs fencing through the STONITH facility.
How do you enable STONITH in a pacemaker?
How do I enable STONITH?
What is Pacemaker database?
The database stores medically useful information about the patients and their pacemaker test results in order to highlight serial changes, which determine whether the pacemaker is still functioning normally, or whether the patient requires further intervention.
What is Db2 Pacemaker?
Pacemaker is an open-source, high availability cluster manager software integrated with Db2® Advanced Edition and Db2 Standard Edition on Linux®. It provides high availability and disaster recovery capabilities for on-premises deployments and non-container cloud environments, such as Amazon Web Service (AWS).
What is STONITH SBD?
SBD (STONITH Block Device) provides a node fencing mechanism for Pacemaker-based clusters through the exchange of messages via shared block storage (SAN, iSCSI, FCoE, etc.). This isolates the fencing mechanism from changes in firmware version or dependencies on specific firmware controllers.
What is SBD in Azure?
In Azure, you have two options for setting up STONITH in the Pacemaker cluster for SLES. You can use an Azure fence agent, which restarts a failed node via the Azure APIs, or you can use a STONITH block device (SBD device).
How to control the status of the communication platform in pacemaker?
It’s one of the most often used commands in Pacemaker, you should get used to it. You can also control the status of corosyng (the communication platform): node1:~ # corosync-cfgtool -s
What is the Corosync and pacemaker configuration tool?
This is a corosync and pacemaker configuration tool that will allow you to easily view, modify, and create pacemaker-based clusters. Remotely configure both Pacemaker and Corosync as well as start, stop, and display status information of the cluster
What kind of pacemaker cluster training can I get from JWB-systems?
JWB-Systems can deliver you training and consulting on all kinds of Pacemaker clusters: SLE321v15 Deploying and Administering SUSE Linux Enterprise High Availability 15 SLE321v12 Deploying and Administering SUSE Linux Enterprise High Availability 12 RHEL 8 / CentOS 8 High Availability RHEL 7 / CentOS 7 High Availability
What is the KVM High available cluster?
If this is your first Cluster, I would recommend reading: Understanding High Availability Cluster and Architecture before setting up the KVM High Available Cluster This is a cluster resource manager that runs scripts at boot time, when individual nodes go up or down or when related resources fail.