Nagios Support Forum

We currently have two servers in our log cluster that are running on CentOS 6. as 6 is EOL this year I am looking at spinning up 3 new CentOS 7 vm's.

My question is this. Would it be possible to add the 3 new servers to the existing cluster, and then retire the 2 original centOS 6 boxes?

I have not been able to find any specific documentation on this procedure.

Many thanks

danniiffxi wrote:My question is this. Would it be possible to add the 3 new servers to the existing cluster, and then retire the 2 original centOS 6 boxes?

Yes. The only caveat is, when you have more than your licensed amount of instances in your cluster active, you will not be able to actively search logs.

Depending on your cluster size, I would recommend adding one of the new CentOS 7 machines to the cluster, then removing one of the CentOS 6 machines, then wait until the cluster status shows Green (meaning there is a primary and replica of every shard in the indexes) and then repeat until all of the CentOS 6 machines are decommissioned.

Excellent thank you Scott, we have an unlimited licence, so adding to the cluster should not cause any issues.

danniiffxi wrote:Excellent thank you Scott, we have an unlimited licence, so adding to the cluster should not cause any issues.

There is no such thing as an Unlimited Log Server license, except in a trial

Hi Scott

Understood. I misread the licence screen. I was looking at - License Instance Usage: 3 / ∞
You can lock this one now thanks for your help

danniiffxi wrote:Hi Scott

Understood. I misread the licence screen. I was looking at - License Instance Usage: 3 / ∞

Code: Select all

License Type:	Data Instance Based
Licensed Data Instances:	2
Current Data Instances:	3
License Instance Usage:	3 / ∞ Upgrade your License

You can lock this one now thanks for your help

Ok

Locking