UDP support with OVHcloud Managed Kubernetes LoadBalancer

[Sporesirius]

Add UDP support to the OVHcloud Managed Kubernetes LoadBalancer.
https://help.ovhcloud.com/csm/en-public-cloud-kubernetes-known-limits?id=kb_article_view&sysparm_article=KB0049873
"The use of the UDP protocol is not supported."
EDIT: And add UDP Proxy Protocol support for the LB

[matmicro]

UDP is mandatory on MKS, thus we could be in position to implement HTTP3.
Hope we could have this asap.

[yomovh]

Hello @Sporesirius @matmicro
Thanks for your issue.
This should be supported when we will provide built in integration between MKS and Public Cloud Load Balancer (aka Octavia) see this issue since UDP is supported by Octavia.
However, we need to be sure that the integration is OK for UDP.

[Sporesirius]

Hi @yomovh ,
Thanks for the response.
Is Octavia also going to support mixed protocols for TCP and UDP? K8s got support for that in 1.26, see kubernetes/enhancements#1435

And is it possible to configure Octavia as a pass-through network load balancer?

[yomovh]

Hello,
Octavia is able to do that (one IP with multiple listeners that manages different traffic types). Managed Kubernetes Team will check that this feature is correctly integrated and come back to this issue.
Octavia is able to support the following incoming traffic : HTTP(S)/1.1, HTTP(S)/2, SCTP, TCP, UDP.

[LisaPerrier]

Hello, we confirm this feature is correctly integrated :)

[matmicro]

@LisaPerrier
Good news.Is it possible to be BETA tester on Octavia LB ?
I need to test UDP.
Any ETA for BETA ?

[LisaPerrier]

A private BETA has been planned, if you are interested contact me on Discord.

[yomovh]

Since this will be implemented by #104 I propose to close the issue.

[Warfront1]

@yomovh, if this has been fixed, it looks like the documentation needs to be updated.
https://help.ovhcloud.com/csm/en-public-cloud-kubernetes-known-limits?id=kb_article_view&sysparm_article=KB0049873

[yomovh]

@Warfront1 Thanks for pointing that.
What I mean is that UDP will be provided by #104 which is currently in beta (check our discord channel). So in GA currently the documentation is accurate.

[matmicro]

Could you please do the needfull to provide proxy_protocol with IDP on Octavia LB ?
Or a way to get client réal IP.

Thanks

[antonin-a]

Hello @matmicro, Public Cloud Load Balancer (Based on Octavia) does support UDP protocol which is the initial topic of this requirement. It also supports proxy protocol with TCP.
However, Proxy Protocol with UDP is not supported actually, I will let @yomovh confirm but it seems to be a technical limitation on Octavia (upstream) side.

[yomovh]

Hello,

I confirm what is said by @antonin-a :
UDP is already supported. Source IP propagation with UDP (through Proxy protocol for instance) is not. Issue for the feature request is here. Currently its status is Acknowledged which means that "These issues have been review by OVHcloud staff that confirmed alignment with our strategy."
However they are not yet Prioritized ("These issues should be addressed within the next 9 to 12 months") nor Planned ("These features/improvements should be released within the next 2 to 3 months")