syntax = "proto3"; package envoy.api.v2; option java_package = "io.envoyproxy.envoy.api.v2"; option java_multiple_files = true; option java_generic_services = true; import "envoy/api/v2/discovery.proto"; import "envoy/api/v2/endpoint/endpoint.proto"; import "envoy/type/percent.proto"; import "google/api/annotations.proto"; import "validate/validate.proto"; import "gogoproto/gogo.proto"; import "google/protobuf/wrappers.proto"; option (gogoproto.equal_all) = true; // [#protodoc-title: EDS] // Endpoint discovery :ref:`architecture overview ` service EndpointDiscoveryService { // The resource_names field in DiscoveryRequest specifies a list of clusters // to subscribe to updates for. rpc StreamEndpoints(stream DiscoveryRequest) returns (stream DiscoveryResponse) { } rpc FetchEndpoints(DiscoveryRequest) returns (DiscoveryResponse) { option (google.api.http) = { post: "/v2/discovery:endpoints" body: "*" }; } } // Each route from RDS will map to a single cluster or traffic split across // clusters using weights expressed in the RDS WeightedCluster. // // With EDS, each cluster is treated independently from a LB perspective, with // LB taking place between the Localities within a cluster and at a finer // granularity between the hosts within a locality. For a given cluster, the // effective weight of a host is its load_balancing_weight multiplied by the // load_balancing_weight of its Locality. message ClusterLoadAssignment { // Name of the cluster. This will be the :ref:`service_name // ` value if specified // in the cluster :ref:`EdsClusterConfig // `. string cluster_name = 1 [(validate.rules).string.min_bytes = 1]; // List of endpoints to load balance to. repeated endpoint.LocalityLbEndpoints endpoints = 2 [(gogoproto.nullable) = false]; // Load balancing policy settings. message Policy { reserved 1; message DropOverload { // Identifier for the policy specifying the drop. string category = 1 [(validate.rules).string.min_bytes = 1]; // Percentage of traffic that should be dropped for the category. envoy.type.FractionalPercent drop_percentage = 2; } // Action to trim the overall incoming traffic to protect the upstream // hosts. This action allows protection in case the hosts are unable to // recover from an outage, or unable to autoscale or unable to handle // incoming traffic volume for any reason. // // At the client each category is applied one after the other to generate // the 'actual' drop percentage on all outgoing traffic. For example: // // .. code-block:: json // // { "drop_overloads": [ // { "category": "throttle", "drop_percentage": 60 } // { "category": "lb", "drop_percentage": 50 } // ]} // // The actual drop percentages applied to the traffic at the clients will be // "throttle"_drop = 60% // "lb"_drop = 20% // 50% of the remaining 'actual' load, which is 40%. // actual_outgoing_load = 20% // remaining after applying all categories. repeated DropOverload drop_overloads = 2; // Priority levels and localities are considered overprovisioned with this // factor (in percentage). This means that we don't consider a priority // level or locality unhealthy until the percentage of healthy hosts // multiplied by the overprovisioning factor drops below 100. // With the default value 140(1.4), Envoy doesn't consider a priority level // or a locality unhealthy until their percentage of healthy hosts drops // below 72%. For example: // // .. code-block:: json // // { "overprovisioning_factor": 100 } // // Read more at :ref:`priority levels ` and // :ref:`localities `. google.protobuf.UInt32Value overprovisioning_factor = 3 [(validate.rules).uint32.gt = 0]; } // Load balancing policy settings. Policy policy = 4; }