Synchronization of a workload with a cluster namespace

[Alexey Roytman]

Hi,
I've just started to play with KCP and have to say that it's a really cool project.

I was able to synchronize my cluster with KCP, according to the README example.
However, I have a question, is it possible to synchronize only a certain namespace (namespaces), instead of the entire cluster? And if yes, is it possible to synchronize different namespaces to different workloads (workspaces).

I can explain my use case, our customers do not want to use CRDs due to lack of etcd recourse and K8s API server load separations. I'm wondering if KCP can provide multi-tenant CRDs isolation.

Thanks a lot
Alexey.

[Stefan Schimanski]

Hi Alexey,

great to see that you like what we are doing in kcp.

For your questions, check the Placement object type and especially NamespaceSelector in the spec https://github.com/kcp-dev/kcp/blob/main/pkg/apis/scheduling/v1alpha1/types_placement.go#L78. You can also have multiple placements per workspace to schedule namespaces to different SyncTargets.

And yes, kcp offers CRD tenant separation. Every workspace is independent.

Best regards,

   Stefan

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[Charles Moulliard]

Are we talking about the KCP namespaces or the namespaces of the physical target clusters - https://github.com/kcp-dev/kcp/blob/main/pkg/apis/scheduling/v1alpha1/types_placement.go#L75-L78?

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[Stefan Schimanski]

On Mon, Sep 12, 2022 at 9:51 AM Charles Moulliard <cmou...@redhat.com> wrote:

Are we talking about the KCP namespaces or the namespaces of the physical target clusters - https://github.com/kcp-dev/kcp/blob/main/pkg/apis/scheduling/v1alpha1/types_placement.go#L75-L78?

The downstream namespace is not something the user is aware of at all. The APIs do not talk about physical clusters and their namespaces. This is about kcp.

Best regards,

  Stefan

 

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