package envoy.extensions.transport_sockets.internal_upstream.v3

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Configuration for the internal upstream address. An internal address defines a loopback user space socket residing in the same proxy instance. This extension allows passing additional structured state across the user space socket in addition to the regular byte stream. The purpose is to facilitate communication between filters on the downstream and the upstream internal connections. All filter state objects that are shared with the upstream connection are also shared with the downstream internal connection using this transport socket.

• repeated InternalUpstreamTransport.MetadataValueSource passthrough_metadata = 1

  Specifies the metadata namespaces and values to insert into the downstream internal connection dynamic metadata when an internal address is used as a host. If the destination name is repeated across two metadata source locations, and both locations contain the metadata with the given name, then the latter in the list overrides the former.

• optional config.core.v3.TransportSocket transport_socket = 3

  The underlying transport socket being wrapped.

Describes the location of the imported metadata value. If the metadata with the given name is not present at the source location, then no metadata is passed through for this particular instance.

Used in: InternalUpstreamTransport

• optional type.metadata.v3.MetadataKind kind = 1

  Specifies what kind of metadata.

• string name = 2

  Name is the filter namespace used in the dynamic metadata.