patchNode and patchNamespacedService 415 UnsupportedMediaType Errors

Trying to patch a node or a namespaced service always returns a “415: Unsupported Media Type” error.

Client Version 0.17.0 Server Version 1.24.2-gke.1900

patchNode Code:

await kc.makeApiClient(k8s.CoreV1Api).patchNode(
    instance.name,
    { metadata: { labels: { 'foo': 'bar' }}},
    undefined, undefined, undefined, undefined, 
    { headers: { 'content-type': PATCH_TYPE }}
)

patchNamespacedService Code:

await kc.makeApiClient(k8s.CoreV1Api).patchNamespacedService(
    "nginx-svc", 
    "default",
    { spec: { externalIPs: 
        instances.map(instance =>
            instance
                .networkInterfaces[0]
                .networkIP
        )
    }},
    undefined, undefined, undefined, undefined,
    { headers: { 'content-type': PATCH_TYPE }}
)

Using any of the below as PATCH_TYPE causes the error.

• k8s.PatchUtils.PATCH_FORMAT_JSON_PATCH
• k8s.PatchUtils.PATCH_FORMAT_JSON_MERGE_PATCH
• k8s.PatchUtils.PATCH_FORMAT_STRATEGIC_MERGE_PATCH

Using NodeJS v16.16.0

[brendandburns]

The “correct” way to override the headers is via an Interceptor see this comment for more details:

https://github.com/kubernetes-client/javascript/issues/817#issuecomment-1152607117

We should expand PatchUtils to do this for you.

[brendandburns]

Closing via https://github.com/kubernetes-client/javascript/pull/872