Delta xDS: configuring resource_names_subscribe

[Nicholas Duncan]

Dear Envoy-users,

My apologies if this is obvious to others.

I am writing a xDS Management server and have returned a DeltaDiscoveryResponse containing a cluster, in response to Envoy's initial DeltaDiscoveryRequest, however I am seeing the following in the logs:

"Dropping received DeltaDiscoveryResponse (with version a42b8c2cfa4511ef975b4f37c3743c70) for non-existent subscription"

As I understand, the "resource_names_subscribe" field of a DeltaDiscoveryRequest specifies which resources the requesting server is interested in, which in the initial DeltaDiscoveryRequest, resource_names_subscribe = [].

However, I do not understand how to use or configure Envoy to fill this field in the DeltaDiscoveryRequest's that it sends.

How can I configure resource_names_subscribe and or are there alternatives?

Cheers,

[Yan Avlasov]

CDS is a wildcard subscription, so empty resource_names_subscribe is expected.

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