Change ClusterId to a string, use as opaque config reference. #32
Description
In the proxy config we currently have a ClusterId which is a complex type, and is expected to match exactly in multiple places in the config. This seems onerous, and instead we should have a simple string that is used for matching between multiple places in the config, and leave the tags part to the UpstreamCluster definition.
For example:
message UpstreamCluster {
string cluster_id = 1;
repeated string tags = 2;
string health_check_endpoint = 3;
...
}
message WeightedCluster {
// Must match a cluster_id from an UpstreamCluster definition.
string dst_cluster = 1;
uint32 weight = 2;
}