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base.proto
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syntax = "proto3";
package envoy.api.v2.core;
import "envoy/api/v2/core/http_uri.proto";
import "envoy/type/percent.proto";
import "google/protobuf/any.proto";
import "google/protobuf/struct.proto";
import "google/protobuf/wrappers.proto";
import "udpa/annotations/migrate.proto";
import "validate/validate.proto";
option java_package = "io.envoyproxy.envoy.api.v2.core";
option java_outer_classname = "BaseProto";
option java_multiple_files = true;
option (udpa.annotations.file_migrate).move_to_package = "envoy.config.core.v3alpha";
// [#protodoc-title: Common types]
// Envoy supports :ref:`upstream priority routing
// <arch_overview_http_routing_priority>` both at the route and the virtual
// cluster level. The current priority implementation uses different connection
// pool and circuit breaking settings for each priority level. This means that
// even for HTTP/2 requests, two physical connections will be used to an
// upstream host. In the future Envoy will likely support true HTTP/2 priority
// over a single upstream connection.
enum RoutingPriority {
DEFAULT = 0;
HIGH = 1;
}
// HTTP request method.
enum RequestMethod {
METHOD_UNSPECIFIED = 0;
GET = 1;
HEAD = 2;
POST = 3;
PUT = 4;
DELETE = 5;
CONNECT = 6;
OPTIONS = 7;
TRACE = 8;
PATCH = 9;
}
// Identifies the direction of the traffic relative to the local Envoy.
enum TrafficDirection {
// Default option is unspecified.
UNSPECIFIED = 0;
// The transport is used for incoming traffic.
INBOUND = 1;
// The transport is used for outgoing traffic.
OUTBOUND = 2;
}
// Identifies location of where either Envoy runs or where upstream hosts run.
message Locality {
// Region this :ref:`zone <envoy_api_field_core.Locality.zone>` belongs to.
string region = 1;
// Defines the local service zone where Envoy is running. Though optional, it
// should be set if discovery service routing is used and the discovery
// service exposes :ref:`zone data <envoy_api_field_endpoint.LocalityLbEndpoints.locality>`,
// either in this message or via :option:`--service-zone`. The meaning of zone
// is context dependent, e.g. `Availability Zone (AZ)
// <https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.html>`_
// on AWS, `Zone <https://cloud.google.com/compute/docs/regions-zones/>`_ on
// GCP, etc.
string zone = 2;
// When used for locality of upstream hosts, this field further splits zone
// into smaller chunks of sub-zones so they can be load balanced
// independently.
string sub_zone = 3;
}
// Identifies a specific Envoy instance. The node identifier is presented to the
// management server, which may use this identifier to distinguish per Envoy
// configuration for serving.
// [#next-free-field: 6]
message Node {
// An opaque node identifier for the Envoy node. This also provides the local
// service node name. It should be set if any of the following features are
// used: :ref:`statsd <arch_overview_statistics>`, :ref:`CDS
// <config_cluster_manager_cds>`, and :ref:`HTTP tracing
// <arch_overview_tracing>`, either in this message or via
// :option:`--service-node`.
string id = 1;
// Defines the local service cluster name where Envoy is running. Though
// optional, it should be set if any of the following features are used:
// :ref:`statsd <arch_overview_statistics>`, :ref:`health check cluster
// verification <envoy_api_field_core.HealthCheck.HttpHealthCheck.service_name>`,
// :ref:`runtime override directory <envoy_api_msg_config.bootstrap.v2.Runtime>`,
// :ref:`user agent addition
// <envoy_api_field_config.filter.network.http_connection_manager.v2.HttpConnectionManager.add_user_agent>`,
// :ref:`HTTP global rate limiting <config_http_filters_rate_limit>`,
// :ref:`CDS <config_cluster_manager_cds>`, and :ref:`HTTP tracing
// <arch_overview_tracing>`, either in this message or via
// :option:`--service-cluster`.
string cluster = 2;
// Opaque metadata extending the node identifier. Envoy will pass this
// directly to the management server.
google.protobuf.Struct metadata = 3;
// Locality specifying where the Envoy instance is running.
Locality locality = 4;
// This is motivated by informing a management server during canary which
// version of Envoy is being tested in a heterogeneous fleet. This will be set
// by Envoy in management server RPCs.
string build_version = 5;
}
// Metadata provides additional inputs to filters based on matched listeners,
// filter chains, routes and endpoints. It is structured as a map, usually from
// filter name (in reverse DNS format) to metadata specific to the filter. Metadata
// key-values for a filter are merged as connection and request handling occurs,
// with later values for the same key overriding earlier values.
//
// An example use of metadata is providing additional values to
// http_connection_manager in the envoy.http_connection_manager.access_log
// namespace.
//
// Another example use of metadata is to per service config info in cluster metadata, which may get
// consumed by multiple filters.
//
// For load balancing, Metadata provides a means to subset cluster endpoints.
// Endpoints have a Metadata object associated and routes contain a Metadata
// object to match against. There are some well defined metadata used today for
// this purpose:
//
// * ``{"envoy.lb": {"canary": <bool> }}`` This indicates the canary status of an
// endpoint and is also used during header processing
// (x-envoy-upstream-canary) and for stats purposes.
// [#next-major-version: move to type/metadata/v2]
message Metadata {
// Key is the reverse DNS filter name, e.g. com.acme.widget. The envoy.*
// namespace is reserved for Envoy's built-in filters.
map<string, google.protobuf.Struct> filter_metadata = 1;
}
// Runtime derived uint32 with a default when not specified.
message RuntimeUInt32 {
// Default value if runtime value is not available.
uint32 default_value = 2;
// Runtime key to get value for comparison. This value is used if defined.
string runtime_key = 3 [(validate.rules).string = {min_bytes: 1}];
}
// Runtime derived bool with a default when not specified.
message RuntimeFeatureFlag {
// Default value if runtime value is not available.
google.protobuf.BoolValue default_value = 1 [(validate.rules).message = {required: true}];
// Runtime key to get value for comparison. This value is used if defined. The boolean value must
// be represented via its
// `canonical JSON encoding <https://developers.google.com/protocol-buffers/docs/proto3#json>`_.
string runtime_key = 2 [(validate.rules).string = {min_bytes: 1}];
}
// Header name/value pair.
message HeaderValue {
// Header name.
string key = 1 [(validate.rules).string = {min_bytes: 1 max_bytes: 16384}];
// Header value.
//
// The same :ref:`format specifier <config_access_log_format>` as used for
// :ref:`HTTP access logging <config_access_log>` applies here, however
// unknown header values are replaced with the empty string instead of `-`.
string value = 2 [(validate.rules).string = {max_bytes: 16384}];
}
// Header name/value pair plus option to control append behavior.
message HeaderValueOption {
// Header name/value pair that this option applies to.
HeaderValue header = 1 [(validate.rules).message = {required: true}];
// Should the value be appended? If true (default), the value is appended to
// existing values.
google.protobuf.BoolValue append = 2;
}
// Wrapper for a set of headers.
message HeaderMap {
repeated HeaderValue headers = 1;
}
// Data source consisting of either a file or an inline value.
message DataSource {
oneof specifier {
option (validate.required) = true;
// Local filesystem data source.
string filename = 1 [(validate.rules).string = {min_bytes: 1}];
// Bytes inlined in the configuration.
bytes inline_bytes = 2 [(validate.rules).bytes = {min_len: 1}];
// String inlined in the configuration.
string inline_string = 3 [(validate.rules).string = {min_bytes: 1}];
}
}
// The message specifies how to fetch data from remote and how to verify it.
message RemoteDataSource {
// The HTTP URI to fetch the remote data.
HttpUri http_uri = 1 [(validate.rules).message = {required: true}];
// SHA256 string for verifying data.
string sha256 = 2 [(validate.rules).string = {min_bytes: 1}];
}
// Async data source which support async data fetch.
message AsyncDataSource {
oneof specifier {
option (validate.required) = true;
// Local async data source.
DataSource local = 1;
// Remote async data source.
RemoteDataSource remote = 2;
}
}
// Configuration for transport socket in :ref:`listeners <config_listeners>` and
// :ref:`clusters <envoy_api_msg_Cluster>`. If the configuration is
// empty, a default transport socket implementation and configuration will be
// chosen based on the platform and existence of tls_context.
message TransportSocket {
// The name of the transport socket to instantiate. The name must match a supported transport
// socket implementation.
string name = 1 [(validate.rules).string = {min_bytes: 1}];
// Implementation specific configuration which depends on the implementation being instantiated.
// See the supported transport socket implementations for further documentation.
oneof config_type {
google.protobuf.Struct config = 2 [deprecated = true];
google.protobuf.Any typed_config = 3;
}
}
// Generic socket option message. This would be used to set socket options that
// might not exist in upstream kernels or precompiled Envoy binaries.
// [#next-free-field: 7]
message SocketOption {
enum SocketState {
// Socket options are applied after socket creation but before binding the socket to a port
STATE_PREBIND = 0;
// Socket options are applied after binding the socket to a port but before calling listen()
STATE_BOUND = 1;
// Socket options are applied after calling listen()
STATE_LISTENING = 2;
}
// An optional name to give this socket option for debugging, etc.
// Uniqueness is not required and no special meaning is assumed.
string description = 1;
// Corresponding to the level value passed to setsockopt, such as IPPROTO_TCP
int64 level = 2;
// The numeric name as passed to setsockopt
int64 name = 3;
oneof value {
option (validate.required) = true;
// Because many sockopts take an int value.
int64 int_value = 4;
// Otherwise it's a byte buffer.
bytes buf_value = 5;
}
// The state in which the option will be applied. When used in BindConfig
// STATE_PREBIND is currently the only valid value.
SocketState state = 6 [(validate.rules).enum = {defined_only: true}];
}
// Runtime derived FractionalPercent with defaults for when the numerator or denominator is not
// specified via a runtime key.
//
// .. note::
//
// Parsing of the runtime key's data is implemented such that it may be represented as a
// :ref:`FractionalPercent <envoy_api_msg_type.FractionalPercent>` proto represented as JSON/YAML
// and may also be represented as an integer with the assumption that the value is an integral
// percentage out of 100. For instance, a runtime key lookup returning the value "42" would parse
// as a `FractionalPercent` whose numerator is 42 and denominator is HUNDRED.
message RuntimeFractionalPercent {
// Default value if the runtime value's for the numerator/denominator keys are not available.
type.FractionalPercent default_value = 1 [(validate.rules).message = {required: true}];
// Runtime key for a YAML representation of a FractionalPercent.
string runtime_key = 2;
}
// Identifies a specific ControlPlane instance that Envoy is connected to.
message ControlPlane {
// An opaque control plane identifier that uniquely identifies an instance
// of control plane. This can be used to identify which control plane instance,
// the Envoy is connected to.
string identifier = 1;
}