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Thank you very much it looks good. &nbsp;I have a question regarding the cluster IP &nbsp;addresss, basically apache is running on cluster IP(172.16.4.82)(From the example). Basically hearbeat daemon will manage the cluster IP address and will assign to node1 or node2 ?
</div>


Thank you very much it looks good.  I have a question regarding the cluster IP  addresss, basically apache is running on cluster IP(172.16.4.82)(From the example). Basically hearbeat daemon will manage the cluster IP address and will assign to node1 or node2 ?

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How does switch know about the cluster IP address since it is not assigned to any of the physical ports on the server?
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How does switch know about the cluster IP address since it is not assigned to any of the physical ports on the server?

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The cluster IP address is the Address you use to communicate with the cluster.
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The cluster IP address is the Address you use to communicate with the cluster.

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I totally understand, but how does application knows this IP address on which node?
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I totally understand, but how does application knows this IP address on which node?

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Clustering software creates a virtual IP address, and this load balances between the two nodes in the cluster.
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Clustering software creates a virtual IP address, and this load balances between the two nodes in the cluster.

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I understand, but it doesn't &nbsp;bind with any of the interface right like eht0:1 or ... like that right? It resides in cluster &nbsp;pacakge?
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I understand, but it doesn't  bind with any of the interface right like eht0:1 or ... like that right? It resides in cluster  pacakge?

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sorry still confused, how &nbsp;does switch knows about this IP address? Does cluster package broadcast and register with the switch?
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sorry still confused, how  does switch knows about this IP address? Does cluster package broadcast and register with the switch?

<div>
Packets are sent to the Cluster IP Address, the Cluster software has the node1 and node2 addresses, and sends the packet to the relevant node in the cluster.<br />
<br />
Cluster IP Address are unicast or multicast. Cluster IP address is based on a Mac Address.
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Packets are sent to the Cluster IP Address, the Cluster software has the node1 and node2 addresses, and sends the packet to the relevant node in the cluster.

Cluster IP Address are unicast or multicast. Cluster IP address is based on a Mac Address.

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thank you, &nbsp;sorry still have question, If you ping for cluster ip address, who will return?
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thank you,  sorry still have question, If you ping for cluster ip address, who will return?

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<div class="content wysiwyg-content">
Hi,<br />
<br />
I want to experiment centos cluster on my esx host. Can I experiment by installing centos on 2 vm guests?
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Hi,

I want to experiment centos cluster on my esx host. Can I experiment by installing centos on 2 vm guests?

centos cluster on   esx5i

Unix is a multitasking, multi-user computer operating system originally developed in 1969 at Bell Labs. Today, it is a modern OS with many commercial flavors and licensees, including FreeBSD, Hewlett-Packard’s UX, IBM AIX and Apple Mac OS-X. Apart from its command-line interface, most UNIX variations support the standardized X Window System for GUIs, with the exception of the Mac OS, which uses a proprietary system.

Unix OS

VMware, a software company founded in 1998,  was one of the first commercially successful companies to offer x86 virtualization. The storage company EMC purchased VMware in 1994. Dell Technologies acquired EMC in 2016. VMware’s parent company is now Dell Technologies.

VMware has many software products that run on desktops, Microsoft Windows, Linux, and macOS, which allows the virtualizing of the x86 architecture.  Its enterprise software hypervisor for servers, VMware vSphere Hypervisor (ESXi), is a bare-metal hypervisor that runs directly on the server hardware and does not require an additional underlying operating system.

VMware

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.