The defaultservicecidr controller runs as an apiserver PostStartHook
hence can not block the startup.
The logic of the controller was copied from the common boilerplate and
was assuming the controller blocked on start, hence defering the
shutdown of the eventbroadcaster.
Only shutdown the eventbroadcaster when the context is done.
Change-Id: I70426d5550afe3b12ab5ea68746238dd96f7db52
This avoids the overhead for the more complex conversion to v1beta1 and might
make it a bit more realistic to get rid of the v1beta1 eventually.
The expected GVK must be set explicitly because when emulating 1.33,
v1beta1 is the default although the fixed storage version is v1beta2.
test/integration/apiserver/apply covers the behavior of server-side-apply (SSA)
for official APIs. But there seem to be no integration tests which cover the
semantic of SSA like adding/removing/updating entries in a list map. This adds
such a test.
It needs an API which is under control of the test and uses
k8s.io/apimachinery/pkg/apis/testapigroup for that purpose, with some issues
fixed (OpenAPI code generation complained) and a new list map added.
Registering that API group in the apiserver needs a REST storage and
strategy. The API group only gets added in the test. However, the production
code has to know about it. In particular,
pkg/generated/openapi/zz_generated.openapi.go has to describe it.
If the external jwt signer is enabled, publishing
OIDC discovery docs and keys fails because the PublicKeysGetter
is not wired correctly.
Set the public keys getter on startup so public key
discovery works in that case as well.
This change modifies the validation logic for ServiceCIDR updates
(`ValidateServiceCIDRUpdate`) to specifically permit upgrading a
single-stack ServiceCIDR (either IPv4 or IPv6) to a dual-stack
configuration.
This reconfiguration path is considered safe because it only involves adding
a new CIDR range without altering the existing primary CIDR. This
ensures that existing Service IP allocations are not disrupted.
Other modifications, such as:
- Downgrading from dual-stack to single-stack
- Reordering CIDRs in a dual-stack configuration
- Changing the primary CIDR during a single-to-dual-stack
reconfiguration
remain disallowed by the validation. These operations carry a higher
risk of breaking existing Services or cluster networking
configurations. Preventing these updates automatically encourages
administrators to perform such changes manually after carefully
assessing the potential impact on their specific cluster environment.
The validation errors and controller logs provide guidance when such
disallowed changes are attempted.
Change-Id: I41dc09dfddb05f277925da2262f8114d6accbd1d
