open-consul/agent/xds/testdata
Freddy 66e2def461
Only pass one hostname via EDS and prefer healthy ones (#8084)
Co-authored-by: Matt Keeler <mkeeler@users.noreply.github.com>

Currently when passing hostname clusters to Envoy, we set each service instance registered with Consul as an LbEndpoint for the cluster.

However, Envoy can only handle one per cluster:
[2020-06-04 18:32:34.094][1][warning][config] [source/common/config/grpc_subscription_impl.cc:87] gRPC config for type.googleapis.com/envoy.api.v2.Cluster rejected: Error adding/updating cluster(s) dc2.internal.ddd90499-9b47-91c5-4616-c0cbf0fc358a.consul: LOGICAL_DNS clusters must have a single locality_lb_endpoint and a single lb_endpoint, server.dc2.consul: LOGICAL_DNS clusters must have a single locality_lb_endpoint and a single lb_endpoint

Envoy is currently handling this gracefully by only picking one of the endpoints. However, we should avoid passing multiple to avoid these warning logs.

This PR:

* Ensures we only pass one endpoint, which is tied to one service instance.
* We prefer sending an endpoint which is marked as Healthy by Consul.
* If no endpoints are healthy we emit a warning and skip the cluster.
* If multiple unique hostnames are spread across service instances we emit a warning and let the user know which will be resolved.
2020-06-12 13:46:17 -06:00
..
clusters Only pass one hostname via EDS and prefer healthy ones (#8084) 2020-06-12 13:46:17 -06:00
endpoints Enable gateways to resolve hostnames to IPv4 addresses (#7999) 2020-06-03 15:28:45 -06:00
listeners Enable gateways to resolve hostnames to IPv4 addresses (#7999) 2020-06-03 15:28:45 -06:00
routes Always require Host header values for http services (#7990) 2020-06-08 13:16:24 -05:00
alt-test-leaf-cert.golden Use golden files for gateway certs and fix listener test flakiness 2020-04-27 11:08:41 -06:00
alt-test-leaf-key.golden Use golden files for gateway certs and fix listener test flakiness 2020-04-27 11:08:41 -06:00
alt-test-root-cert.golden Use golden files for gateway certs and fix listener test flakiness 2020-04-27 11:08:41 -06:00
test-leaf-cert.golden Connect: allow configuring Envoy for L7 Observability (#5558) 2019-04-29 17:27:57 +01:00
test-leaf-key.golden Connect: allow configuring Envoy for L7 Observability (#5558) 2019-04-29 17:27:57 +01:00
test-root-cert.golden Connect: allow configuring Envoy for L7 Observability (#5558) 2019-04-29 17:27:57 +01:00