Pod with PVC will not be scheduled if the PVC is being deleted.
This can happen when the PVC has finalizers of storage plugins.
Such a pod becomes pending. Unfortunately, after the finalizer
finishes and PVC is deleted, the pod remains pending forever.
The StatefulSet controller does nothing for this pending pod.
This commit prevents the StatefulSet controller from creating
such pods when PVC is to be deleted.
Previously the controllers would proceed with additional creates,
updates, or deletes if 1 failed. That could potentially result in
scenarios where an EndpointSlice create or update failing while a delete
worked. This updates the logic so that removals will not happen if
additions fail.
The KEP specifies that the controller will "mirror all labels from the
Endpoints resource and all endpoints and ports from the corresponding subset".
I'd missed that in my initial implementation, this should fix that.
This mirrors an earlier fix to the EndpointSlice controller. I'll make a
follow up PR to move this component to a shared package, but that seems
beyond the scope of a bug fix PR.
EndpointController was accidentally requiring all headless services to
be IPv4-only in clusters with IPv6DualStack enabled.
This still leaves "legacy" (ie, IPFamily-less) headless services as
always IPv4-only because the controller doesn't currently have easy
access to the information that would allow it to fix that.
(EndpointSliceController had the same problem already, and still
does.) This can be fixed, if needed, by manually setting IPFamily,
and the proposed API for 1.20 will handle this situation better.
Rewrite some of the test helpers to better support single-stack IPv4
vs single-stack IPv6 vs dual-stack IPv4 primary vs dual-stack IPv6
primary, and update TestPodToEndpointAddressForService to test some
more cases.
The endpoint controllers responded to Pod changes by trying to figure
out if the generated endpoint resource would change, rather than just
checking if the Pod had changed, but since the set of Pod fields that
need to be checked depend on the Service and Node as well, the code
ended up only checking for a subset of the changes it should have.
In particular, EndpointSliceController ended up only looking at IPv4
Pod IPs when processing Pod update events, so when a Pod went from
having no IP to having only an IPv6 IP, EndpointSliceController would
think it hadn't changed.
This was introduced by commit: f04ce3cfba
Since this func is simple and clear enough, just not comment it anymore.
Signed-off-by: Zhou Peng <p@ctriple.cn>
