Absent Member.. ScQuinn Absent Member..
Absent Member..
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Hardware Loadbalancer Health Monitor

Hello,

 

I am curious if there is any recommendation for the setting of the health monitor on a hardware loadbalancer.

 

We upgraded our Development enviornment from 9.14 to 9.22 and our health monitor was no longer seeing our nodes as being online.

 

The health monitor checked a GET /itg/dashboard/app/portal/PageView.jsp\r\n URI. However with the upgrade, it no longer returns any valid health and was seeing the nodes as offline.

 

We are using an F5 loadbalancer.

 

Any tips or suggestions are appreciated.

 

Thanks.

Scott

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Absent Member.. randull Absent Member..
Absent Member..

Re: Hardware Loadbalancer Health Monitor

Hi Scott,

 

From the support prospective there isn't any recommendation about how to set the "health monitor".

 

Thanks,

Randall

Best regards,
Randall

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Absent Member.. ScQuinn Absent Member..
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Re: Hardware Loadbalancer Health Monitor

Thanks Randall.

 

This may just be something that we need to figure out. We have the TCP check enabled but are looking for something that can also help aid if a node goes down but the server:port is still functioning.

 

It doesn't happen refrequently, but does on occasion.

 

Thanks again.

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Absent Member.. randull Absent Member..
Absent Member..

Re: Hardware Loadbalancer Health Monitor

Hi Scott,

 

I think it is a good practice to set the Monitor Health on your load balancer. Unfortunately, we do not have recommendations of how set it out.

 

Best regards,
Randall

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Absent Member.. Jim Esler Absent Member..
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Re: Hardware Loadbalancer Health Monitor

I recall seeing a note somewhere, probably in one of these forums or in the release notes, that one of the 9.14 patches disabled the ability to log in directly to a node. We are running the initial 9.14 release with no patches and we have three probes running: one to the F5 and one each to the two nodes. It is very useful to know when a single node fails as that is the most common failure mode we see. This is one reason we have resisted installing a patch.

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Absent Member.. ScQuinn Absent Member..
Absent Member..

Re: Hardware Loadbalancer Health Monitor

I agree. We actually used a service called Keynote that we could log into our application using - however this did not help us with outages in regards to the F5.

 

I know with the F5 Custom HTTP monitor, you can ask for a response - called Receive String. In theory, you can set that to be some Text that would be on the logon page - which the F5 would check for to ascertain if the node was up.

 

I am looking to see what we have ours set to since we are changing our Logon page with the upgrade to v9.22. We may have it look for our company name - as this may be something very specific.

 

Of course, we will do lots of testing on it as well.

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