* Factor all subscription responses to DiscoveryResponse message with an Any
resource type. This further simplifies the Subscription interface in
the Envoy client, as it no longer needs to be templatized on the
response type.
* Replace version_info bytes type with string. This allows plain
strings to be used in JSON representations rather than base64 encoded
strings as required in the canonical proto3 translation of bytes.
* Clarify ACK/NACK semantics with version_info in comments.
Fixes#85.
This PR allows for easier implementation of a unified subscription model
in Envoy for gRPC/REST/inotify filesystem config updates:
* The DiscoveryRequest basically looks the same in all subscription APIs
today, so factored out to DiscoveryRequest.
* xDiscoveryResponse now uses a consistent convention. This will allow
C++ template level duck typing to populate the response in a single
implementation for all APIs. This is mostly relevant for the filesystem
watch implementation, where we need to map from resource names to file
paths, but could also make API server implementation easier
potentially.
While still supporting only 2 priorities today, this PR leaves room for
an additional finite number of priorities via enum extension. Since
we're not planning on reflecting arbitrary downstream priorities in the
upstream connection, we only expect a small number of priorities to be
useful in configuring routes and clusters.
Fixes#1.
As previously pointed out in #9, the empty string is not generally a useful
value in the xDS APIs, so can be be considered equivalent to an unset
field. This is now documented in principles in #28 as well.
Also replace google.protobuf.BytesValue with bytes.
This will be useful for Google and other site specific extension of the
resolving of both names and ports. For listeners, ports and bound
addresses can be expressed in a site-specific format. For upstreams,
host names can be resolved using the plugin.
htuch
tschroed
Matt Klein
Piotr Sikora