// [#protodoc-title: Bootstrap]
// This proto is supplied via the :option:`-c` CLI flag and acts as the root
// of the Envoy v2 configuration. See the :ref:`v2 configuration overview
// <config_overview_v2_bootstrap>` for more detail.

syntax = "proto3";

package envoy.config.bootstrap.v2;
option go_package = "v2";

import "envoy/api/v2/core/address.proto";
import "envoy/api/v2/core/base.proto";
import "envoy/api/v2/auth/cert.proto";
import "envoy/api/v2/core/config_source.proto";
import "envoy/api/v2/cds.proto";
import "envoy/api/v2/lds.proto";
import "envoy/config/trace/v2/trace.proto";
import "envoy/config/metrics/v2/stats.proto";
import "envoy/config/overload/v2alpha/overload.proto";
import "envoy/config/ratelimit/v2/rls.proto";

import "google/protobuf/duration.proto";

import "validate/validate.proto";
import "gogoproto/gogo.proto";

// Bootstrap :ref:`configuration overview <config_overview_v2_bootstrap>`.
message Bootstrap {
  // Node identity to present to the management server and for instance
  // identification purposes (e.g. in generated headers).
  envoy.api.v2.core.Node node = 1;

  message StaticResources {
    // Static :ref:`Listeners <envoy_api_msg_Listener>`. These listeners are
    // available regardless of LDS configuration.
    repeated envoy.api.v2.Listener listeners = 1 [(gogoproto.nullable) = false];

    // If a network based configuration source is specified for :ref:`cds_config
    // <envoy_api_field_config.bootstrap.v2.Bootstrap.DynamicResources.cds_config>`, it's necessary
    // to have some initial cluster definitions available to allow Envoy to know
    // how to speak to the management server. These cluster definitions may not
    // use :ref:`EDS <arch_overview_dynamic_config_eds>` (i.e. they should be static
    // IP or DNS-based).
    repeated envoy.api.v2.Cluster clusters = 2 [(gogoproto.nullable) = false];

    // These static secrets can be used by :ref:`SdsSecretConfig
    // <envoy_api_msg_auth.SdsSecretConfig>`
    repeated envoy.api.v2.auth.Secret secrets = 3 [(gogoproto.nullable) = false];
  }
  // Statically specified resources.
  StaticResources static_resources = 2;

  message DynamicResources {
    // All :ref:`Listeners <envoy_api_msg_Listener>` are provided by a single
    // :ref:`LDS <arch_overview_dynamic_config_lds>` configuration source.
    envoy.api.v2.core.ConfigSource lds_config = 1;

    // All post-bootstrap :ref:`Cluster <envoy_api_msg_Cluster>` definitions are
    // provided by a single :ref:`CDS <arch_overview_dynamic_config_cds>`
    // configuration source.
    envoy.api.v2.core.ConfigSource cds_config = 2;

    // A single :ref:`ADS <config_overview_v2_ads>` source may be optionally
    // specified. This must have :ref:`api_type
    // <envoy_api_field_core.ApiConfigSource.api_type>` :ref:`GRPC
    // <envoy_api_enum_value_core.ApiConfigSource.ApiType.GRPC>`. Only
    // :ref:`ConfigSources <envoy_api_msg_core.ConfigSource>` that have
    // the :ref:`ads <envoy_api_field_core.ConfigSource.ads>` field set will be
    // streamed on the ADS channel.
    envoy.api.v2.core.ApiConfigSource ads_config = 3;

    reserved 4;
  }
  // xDS configuration sources.
  DynamicResources dynamic_resources = 3;

  // Configuration for the cluster manager which owns all upstream clusters
  // within the server.
  ClusterManager cluster_manager = 4;

  // Health discovery service config option.
  // (:ref:`core.ApiConfigSource <envoy_api_msg_core.ApiConfigSource>`)
  envoy.api.v2.core.ApiConfigSource hds_config = 14;

  // Optional file system path to search for startup flag files.
  string flags_path = 5;

  // Optional set of stats sinks.
  repeated envoy.config.metrics.v2.StatsSink stats_sinks = 6;

  // Configuration for internal processing of stats.
  envoy.config.metrics.v2.StatsConfig stats_config = 13;

  // Optional duration between flushes to configured stats sinks. For
  // performance reasons Envoy latches counters and only flushes counters and
  // gauges at a periodic interval. If not specified the default is 5000ms (5
  // seconds).
  google.protobuf.Duration stats_flush_interval = 7 [(gogoproto.stdduration) = true];

  // Optional watchdog configuration.
  Watchdog watchdog = 8;

  // Configuration for an external tracing provider. If not specified, no
  // tracing will be performed.
  envoy.config.trace.v2.Tracing tracing = 9;

  // Configuration for an external rate limit service provider. If not
  // specified, any calls to the rate limit service will immediately return
  // success.
  envoy.config.ratelimit.v2.RateLimitServiceConfig rate_limit_service = 10 [deprecated = true];

  // Configuration for the runtime configuration provider. If not specified, a
  // “null” provider will be used which will result in all defaults being used.
  Runtime runtime = 11;

  // Configuration for the local administration HTTP server.
  Admin admin = 12;

  // Optional overload manager configuration.
  envoy.config.overload.v2alpha.OverloadManager overload_manager = 15;
}

// Administration interface :ref:`operations documentation
// <operations_admin_interface>`.
message Admin {
  // The path to write the access log for the administration server. If no
  // access log is desired specify ‘/dev/null’. This is only required if
  // :ref:`address <envoy_api_field_config.bootstrap.v2.Admin.address>` is set.
  string access_log_path = 1;

  // The cpu profiler output path for the administration server. If no profile
  // path is specified, the default is ‘/var/log/envoy/envoy.prof’.
  string profile_path = 2;

  // The TCP address that the administration server will listen on.
  // If not specified, Envoy will not start an administration server.
  envoy.api.v2.core.Address address = 3;
}

// Cluster manager :ref:`architecture overview <arch_overview_cluster_manager>`.
message ClusterManager {
  // Name of the local cluster (i.e., the cluster that owns the Envoy running
  // this configuration). In order to enable :ref:`zone aware routing
  // <arch_overview_load_balancing_zone_aware_routing>` this option must be set.
  // If *local_cluster_name* is defined then :ref:`clusters
  // <envoy_api_msg_Cluster>` must be defined in the :ref:`Bootstrap
  // static cluster resources
  // <envoy_api_field_config.bootstrap.v2.Bootstrap.StaticResources.clusters>`. This is unrelated to
  // the :option:`--service-cluster` option which does not `affect zone aware
  // routing <https://github.com/envoyproxy/envoy/issues/774>`_.
  string local_cluster_name = 1;

  message OutlierDetection {
    // Specifies the path to the outlier event log.
    string event_log_path = 1;
  }
  // Optional global configuration for outlier detection.
  OutlierDetection outlier_detection = 2;

  // Optional configuration used to bind newly established upstream connections.
  // This may be overridden on a per-cluster basis by upstream_bind_config in the cds_config.
  envoy.api.v2.core.BindConfig upstream_bind_config = 3;

  // A management server endpoint to stream load stats to via
  // *StreamLoadStats*. This must have :ref:`api_type
  // <envoy_api_field_core.ApiConfigSource.api_type>` :ref:`GRPC
  // <envoy_api_enum_value_core.ApiConfigSource.ApiType.GRPC>`.
  envoy.api.v2.core.ApiConfigSource load_stats_config = 4;
}

// Envoy process watchdog configuration. When configured, this monitors for
// nonresponsive threads and kills the process after the configured thresholds.
message Watchdog {
  // The duration after which Envoy counts a nonresponsive thread in the
  // *server.watchdog_miss* statistic. If not specified the default is 200ms.
  google.protobuf.Duration miss_timeout = 1;

  // The duration after which Envoy counts a nonresponsive thread in the
  // *server.watchdog_mega_miss* statistic. If not specified the default is
  // 1000ms.
  google.protobuf.Duration megamiss_timeout = 2;

  // If a watched thread has been nonresponsive for this duration, assume a
  // programming error and kill the entire Envoy process. Set to 0 to disable
  // kill behavior. If not specified the default is 0 (disabled).
  google.protobuf.Duration kill_timeout = 3;

  // If at least two watched threads have been nonresponsive for at least this
  // duration assume a true deadlock and kill the entire Envoy process. Set to 0
  // to disable this behavior. If not specified the default is 0 (disabled).
  google.protobuf.Duration multikill_timeout = 4;
}

// Runtime :ref:`configuration overview <config_runtime>`.
message Runtime {
  // The implementation assumes that the file system tree is accessed via a
  // symbolic link. An atomic link swap is used when a new tree should be
  // switched to. This parameter specifies the path to the symbolic link. Envoy
  // will watch the location for changes and reload the file system tree when
  // they happen.
  string symlink_root = 1 [(validate.rules).string.min_bytes = 1];

  // Specifies the subdirectory to load within the root directory. This is
  // useful if multiple systems share the same delivery mechanism. Envoy
  // configuration elements can be contained in a dedicated subdirectory.
  string subdirectory = 2;

  // Specifies an optional subdirectory to load within the root directory. If
  // specified and the directory exists, configuration values within this
  // directory will override those found in the primary subdirectory. This is
  // useful when Envoy is deployed across many different types of servers.
  // Sometimes it is useful to have a per service cluster directory for runtime
  // configuration. See below for exactly how the override directory is used.
  string override_subdirectory = 3;
}