Diskless Machine(PxE boot)

PxE is a way of booting OS kernel over the network rather than from disk. It consist of one or more PxE servers which holds all kernel and initial ramdisk image. And PxE clients which are actual host where user application and services start. It is depicted in the Figure-1. PxE server running tftp and […]

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How to Create Red Hat HA Cluster Part -IV

This is the last part of clustering series post regarding Red Hat HA cluster. In this post, HA NFS will be created in the cluster. Creating a Fail-over Domain: [root@node01 ~]# ccs -h localhost –addfailoverdomain NFS [root@node01 ~]# ccs -h localhost –addfailoverdomainnode NFS node01-hb.cls.local [root@node01 ~]# ccs -h localhost –addfailoverdomainnode NFS node02-hb.cls.local Creating Resources. As […]

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How to Create Red Hat HA Cluster Part -III

In this post, we will do the actual work to finish cluster configuration such as starting cluster services, configuration of the clustered LVM disk, creating Fail-over domain, resources, and service groups. Two-Node Cluster As it is indicated in the previous posts two-node cluster is a special form of a cluster because of split-brain situations. So […]

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How to Create Red Hat HA Cluster Part -II

In the previous post, we prepared cluster environment such as cluster nodes(2), disks(3) network interfaces on each node(2)  and installed necessary packages on the nodes to build our cluster. In this part, we start building our cluster environment. Creating Quorum Disk We need to initialize one of our three disks as a quorum disk which […]

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How to Create Red Hat HA Cluster Part -I

This post will actually consists of couple of parts. At the end of the complete part of the series,  we will have  Red Hat HA Cluster that runs Apache and NFS . In this tutorial I will be using two CentOS6 hosts, named node01 and node02 on the KVM host. Each node has two interfaces […]

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