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Passed EX436 High Availability Clustering

Posted on 28/02/2019 by Lisenet

After my classroom exam was cancelled, I decided to take an individual exam. Continue reading →

Posted in Linux | Tagged Corosync, EX436, Pacemaker, RHCA, RHEL, RoadToRHCA | 44 Comments

High Availability Pacemaker Cluster Monitoring

Posted on 26/01/2019 by Lisenet

We’re going to configure cluster email notifications on RHEL 7. Continue reading →

Posted in High Availability, Linux | Tagged CentOS, Corosync, EX436, Pacemaker, RHCA, RHEL | 4 Comments

High Availability Pacemaker Cluster Logging

Posted on 22/01/2019 by Lisenet

We’re going to configure cluster logging on RHEL 7. Continue reading →

Posted in High Availability, Linux | Tagged CentOS, Corosync, EX436, Pacemaker, RHCA, RHEL | Leave a comment

Libvirt Fencing on a Physical KVM Host

Posted on 24/12/2018 by Lisenet

The Red Hat High Availability Add-On ships with a number of different fencing agents for different hypervisors. Continue reading →

Posted in High Availability | Tagged CentOS, EX436, fence_xvm, KVM, Pacemaker, RHCA, RHEL | 7 Comments

Configure Active/Passive NFS Server on a Pacemaker Cluster with Puppet

Posted on 29/04/2018 by Lisenet

We’re going to use Puppet to install Pacemaker/Corosync and configure an NFS cluster. Continue reading →

Posted in High Availability, Linux | Tagged CentOS, Corosync, fence_pve, homelab, NFS, Pacemaker, Puppet | Leave a comment

Active/Active High Availability Pacemaker Cluster with GFS2 and iSCSI Shared Storage on CentOS 7

Posted on 26/02/2016 by Lisenet

We are going to build a three-node active/active HA cluster using Pacemaker and Corosync. Continue reading →

Posted in High Availability, Linux | Tagged CentOS, Corosync, fence_vmware_soap, GFS2, iSCSI, LPIC-3, LVM, multipath, NetApp, Pacemaker, STONITH | 30 Comments

Active/Passive MySQL High Availability Pacemaker Cluster with DRBD on CentOS 7

Posted on 17/01/2016 by Lisenet

We are going to build a two-node active/passive MariaDB HA cluster using Pacemaker and Corosync.  Continue reading →

Posted in High Availability, Linux | Tagged CentOS, Corosync, DRBD, LPIC-3, MariaDB, MySQL, Pacemaker | 178 Comments

Active Node Not Updated by Virtual Server: Simpana cvclusternotify on Unix Failover

Posted on 14/01/2016 by Lisenet

After installing the software components on the physical nodes and the cluster group client is configured, we must configure the cvclusternotify script. Continue reading →

Posted in High Availability, Linux | Tagged CentOS, Commvault, cvclusternotify, Pacemaker, Simpana | Leave a comment

Active/Passive Cluster With Pacemaker, Corosync and DRBD on CentOS 7: Part 4 – Configure Fencing (STONITH)

Posted on 31/12/2015 by Lisenet

The following is part 4 of a 4 part series that will go over an installation and configuration of Pacemaker, Corosync, Apache, DRBD and a VMware STONITH agent. Continue reading →

Posted in High Availability, Linux | Tagged CentOS, Corosync, fence_vmware_soap, LPIC-3, Pacemaker, STONITH | 34 Comments

Active/Passive Cluster With Pacemaker, Corosync and DRBD on CentOS 7: Part 3 – Replicate Storage with DRBD

Posted on 31/12/2015 by Lisenet

The following is part 3 of a 4 part series that will go over an installation and configuration of Pacemaker, Corosync, Apache, DRBD and a VMware STONITH agent. Continue reading →

Posted in High Availability, Linux | Tagged CentOS, Corosync, DRBD, LPIC-3, Pacemaker | 6 Comments

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