Support for multiple LTM monitors when using HostGroup

[thomas-cripps-fg]

Title

Support for multiple LTM monitors on a pool when virtual server using HostGroup

Description

When deploying multiple virtual server configurations when also using HostGroup LTM monitors appear to overwrite themselves, unsure if RFE or Bug.

Actual Problem

Unable to monitor multiple applications in same backend pool as LTM monitors overwrite themselves. When a batch of VirtualServer CRDs are deployed it seems like the last CRD in the batch is the LTM monitor which persists giving the illusion of appending configuration

Solution Proposed

Allow support for multiple LTM monitors within same backend pool and the use of MinimumMonitors allows the pool not to go down

Alternatives

Unsure if anything else would work

Additional context

N/A

[mdditt2000]

@thomas-cripps-fg please follow the example https://github.com/F5Networks/k8s-bigip-ctlr/blob/master/docs/config_examples/customResource/VirtualServer/HealthMonitor/monitors-virtual-server.yaml

Schema should allow this. Add HostGroup to the example. Let me know the results or share your CRD to automation_toolchain_pm@f5.com

[mdditt2000]

re-opened. Let me review this with my team.

[thomas-cripps-fg]

Thanks Mark.

Issue seems to be when we have multiple virtual server CRDs all using the same virtual server and pool due to the use of HostGroup

[trinaths]

@thomas-cripps-fg Please follow the example https://github.com/F5Networks/k8s-bigip-ctlr/blob/2.x-master/docs/config_examples/customResource/VirtualServer/HealthMonitor/monitors-virtual-server.yaml and share your feedback.

[thomas-cripps-fg]

Hi Trinath,

The CRD is not a problem here, we can confirm that is working.

The behaviour we see seems to relate to configuration being overwritten, appreciate AS3 is declarative but with HostGroup does that change anything?

[mdditt2000]

@thomas-cripps-fg @trinaths lets take this conversation off GitHub and schedule a meeting to see whats going on. I will send a email.

[thomas-cripps-fg]

Thanks Mark.

FYI I’m UK based so BST right now

Tom Cripps

Digital Platform & Network Security Manager

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From: mark dittmer @.> Date: Wednesday, 5 June 2024 at 18:13 To: F5Networks/k8s-bigip-ctlr @.> Cc: Tom Cripps @.>, Mention @.> Subject: Re: [F5Networks/k8s-bigip-ctlr] Support for multiple LTM monitors when using HostGroup (Issue #3442)

@thomas-cripps-fghttps://github.com/thomas-cripps-fg @trinathshttps://github.com/trinaths lets take this conversation off GitHub and schedule a meeting to see whats going on. I will send a email.

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