Kubernetes Client cannot create Lease resources in native mode

[jamesnetherton]

Describe the bug

If you try to create a Lease with the Kubernetes Client in native mode, then it fails with the following error returned from the API server:

Exception while trying to create the lease resource: io.fabric8.kubernetes.client.KubernetesClientException: Failure executing: POST at: https://172.30.0.1/apis/coordination.k8s.io/v1/namespaces/default/leases. Message: Lease in version "v1" cannot be handled as a Lease: json: cannot unmarshal number into Go struct field LeaseSpec.spec.acquireTime of type string. Received status: Status(apiVersion=v1, code=400, details=null, kind=Status, message=Lease in version "v1" cannot be handled as a Lease: json: cannot unmarshal number into Go struct field LeaseSpec.spec.acquireTime of type string, metadata=ListMeta(_continue=null, remainingItemCount=null, resourceVersion=null, selfLink=null, additionalProperties={}), reason=BadRequest, status=Failure, additionalProperties={}).

The problem seems to be that the serialization of the ZonedDateTime fields on LeaseSpec is incorrect. In JVM mode, the serialized Lease JSON looks like:

{
  "apiVersion": "coordination.k8s.io/v1",
  "kind": "Lease",
  "spec": {
    "acquireTime": "2022-05-27T08:46:39.358180Z",
    "holderIdentity": "test",
    "leaseDurationSeconds": 1,
    "leaseTransitions": 1,
    "renewTime": "2022-05-27T08:46:39.358200Z"
  }
}

In native mode it is (note the differences in date format):

{
  "apiVersion": "coordination.k8s.io/v1",
  "kind": "Lease",
  "spec": {
    "acquireTime": "2022-05-27T09:25:29.711055+01:00",
    "holderIdentity": "test",
    "leaseDurationSeconds": 1,
    "leaseTransitions": 1,
    "renewTime": "2022-05-27T09:25:29.711061+01:00",
    "additionalProperties": {}
  }
}

acquireTime and renewTime are configured like:

@JsonProperty("acquireTime")
@JsonFormat(timezone = "UTC", pattern = "yyyy-MM-dd'T'HH:mm:ss.SSSSSS'Z'")
private ZonedDateTime acquireTime;

For the @JsonFormat to take effect properly, I had to register LeaseSpec for reflective field access. Seems only method access is configured for it by default.

It's simple to reproduce the issue outside of k8s like:

@Inject
ObjectMapper objectMapper;

public void testLeaseSerialization() throws JsonProcessingException {
    LeaseSpec spec = new LeaseSpec(ZonedDateTime.now(), "test", 1, 1, ZonedDateTime.now());
    Lease build = new LeaseBuilder().withSpec(spec).build();
    System.out.println(objectMapper.writeValueAsString(build));
}

Expected behavior

No response

Actual behavior

No response

How to Reproduce?

No response

Output of uname -a or ver

No response

Output of java -version

No response

GraalVM version (if different from Java)

No response

Quarkus version or git rev

No response

Build tool (ie. output of mvnw --version or gradlew --version)

No response

Additional information

No response

[quarkus-bot]

/cc @geoand, @iocanel