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techin4
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How can I setup failover for 2 Linux Redhat Servers

Hi,

I was wondering if someone can help guide me on how to build 2 Linux Redhat servers with failover. The failover is the most important part as this will go into a production environment. I'm not too sure exactly if I'm suppose to build the failover when setting up the Linux box or build the Linux box first then setup the failover. Any help is appreciated, Thanks...
Linux NetworkingLinux DistributionsServer Hardware

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gheist

8/22/2022 - Mon
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Zephyr ICT

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techin4

ASKER
Yes, this will be for Applications but also just in case that server goes down we dont want any downtime. I have not looked at this document yet. I will now, Thanks.
techin4

ASKER
It looks like I will need to purchase this Add-On. Do you know if there is a configuration that will be free instead?
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techin4

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Thank You...I will look into this.
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rwheeler23
madunix

As said above you can create a Red Hat High-availability cluster with High-availability add-on, so that the service can failover to passive node once the active node is not working.
gheist

Can you explain which application has to provide continuous service to users?
Some have much better and almost stateless fail-ver compared to using extra expense at them...
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techin4

ASKER
Thanks madunix..I will look into this as well.
gheist, there is a JAVA application that we would like to always have running since it connects to our Active Directory for authentication.
Ultimately, we want the server to always be up so that we can access this application.
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gheist

what resorces must be shared between nodes?
techin4

ASKER
What we would like is to have make sure that if the entire server goes down, the other one will pick up where the failed server left off.
gheist

That is not possible with RHEL and commodity hardware.
Closest approximation in vmware fault tolerance
Also things like hp nonstop etc can come into play.

So since we are here at the low end of budget line - can you assess what service must be always available?
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fblack61
techin4

ASKER
Hi gheist,

The server that must always be available is our web application which sits on Apache Tomcat.
gheist

Well, my appologies for missing this post.
So merely DNS load balancing suffices. Thats why i was repeating about what are those share(d|able) ressources ..