.. _envoy_v3_api_file_envoy/config/bootstrap/v3/bootstrap.proto: 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 ` for more detail. .. _envoy_v3_api_msg_config.bootstrap.v3.Bootstrap: config.bootstrap.v3.Bootstrap ----------------------------- `[config.bootstrap.v3.Bootstrap proto] `_ Bootstrap :ref:`configuration overview `. .. code-block:: json { "node": "{...}", "static_resources": "{...}", "dynamic_resources": "{...}", "cluster_manager": "{...}", "hds_config": "{...}", "flags_path": "...", "stats_sinks": [], "stats_config": "{...}", "stats_flush_interval": "{...}", "stats_flush_on_admin": "...", "watchdog": "{...}", "watchdogs": "{...}", "tracing": "{...}", "layered_runtime": "{...}", "admin": "{...}", "overload_manager": "{...}", "enable_dispatcher_stats": "...", "header_prefix": "...", "stats_server_version_override": "{...}", "use_tcp_for_dns_lookups": "...", "bootstrap_extensions": [], "fatal_actions": [], "default_socket_interface": "..." } .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.node: node (:ref:`config.core.v3.Node `) Node identity to present to the management server and for instance identification purposes (e.g. in generated headers). .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.static_resources: static_resources (:ref:`config.bootstrap.v3.Bootstrap.StaticResources `) Statically specified resources. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.dynamic_resources: dynamic_resources (:ref:`config.bootstrap.v3.Bootstrap.DynamicResources `) xDS configuration sources. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.cluster_manager: cluster_manager (:ref:`config.bootstrap.v3.ClusterManager `) Configuration for the cluster manager which owns all upstream clusters within the server. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.hds_config: hds_config (:ref:`config.core.v3.ApiConfigSource `) Health discovery service config option. (:ref:`core.ApiConfigSource `) .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.flags_path: flags_path (`string `_) Optional file system path to search for startup flag files. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.stats_sinks: stats_sinks (**repeated** :ref:`config.metrics.v3.StatsSink `) Optional set of stats sinks. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.stats_config: stats_config (:ref:`config.metrics.v3.StatsConfig `) Configuration for internal processing of stats. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.stats_flush_interval: stats_flush_interval (`Duration `_) 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). Only one of `stats_flush_interval` or `stats_flush_on_admin` can be set. Duration must be at least 1ms and at most 5 min. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.stats_flush_on_admin: stats_flush_on_admin (`bool `_) Flush stats to sinks only when queried for on the admin interface. If set, a flush timer is not created. Only one of `stats_flush_on_admin` or `stats_flush_interval` can be set. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.watchdog: watchdog (:ref:`config.bootstrap.v3.Watchdog `) Optional watchdog configuration. This is for a single watchdog configuration for the entire system. Deprecated in favor of *watchdogs* which has finer granularity. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.watchdogs: watchdogs (:ref:`config.bootstrap.v3.Watchdogs `) Optional watchdogs configuration. This is used for specifying different watchdogs for the different subsystems. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.tracing: tracing (:ref:`config.trace.v3.Tracing `) Configuration for an external tracing provider. .. attention:: This field has been deprecated in favor of :ref:`HttpConnectionManager.Tracing.provider `. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.layered_runtime: layered_runtime (:ref:`config.bootstrap.v3.LayeredRuntime `) Configuration for the runtime configuration provider. If not specified, a “null” provider will be used which will result in all defaults being used. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.admin: admin (:ref:`config.bootstrap.v3.Admin `) Configuration for the local administration HTTP server. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.overload_manager: overload_manager (:ref:`config.overload.v3.OverloadManager `) Optional overload manager configuration. .. attention:: This field should be configured in the presence of untrusted *downstreams*. This field should be configured in the presence of untrusted *upstreams*. Example configuration for untrusted environments: .. code-block:: yaml overload_manager: actions: - name: envoy.overload_actions.shrink_heap triggers: - name: envoy.resource_monitors.fixed_heap threshold: value: 0.9 - name: envoy.overload_actions.stop_accepting_requests triggers: - name: envoy.resource_monitors.fixed_heap threshold: value: 0.95 refresh_interval: 0.25s resource_monitors: - name: envoy.resource_monitors.fixed_heap typed_config: '@type': type.googleapis.com/envoy.config.resource_monitor.fixed_heap.v2alpha.FixedHeapConfig max_heap_size_bytes: 1073741824.0 .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.enable_dispatcher_stats: enable_dispatcher_stats (`bool `_) Enable :ref:`stats for event dispatcher `, defaults to false. Note that this records a value for each iteration of the event loop on every thread. This should normally be minimal overhead, but when using :ref:`statsd `, it will send each observed value over the wire individually because the statsd protocol doesn't have any way to represent a histogram summary. Be aware that this can be a very large volume of data. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.header_prefix: header_prefix (`string `_) Optional string which will be used in lieu of x-envoy in prefixing headers. For example, if this string is present and set to X-Foo, then x-envoy-retry-on will be transformed into x-foo-retry-on etc. Note this applies to the headers Envoy will generate, the headers Envoy will sanitize, and the headers Envoy will trust for core code and core extensions only. Be VERY careful making changes to this string, especially in multi-layer Envoy deployments or deployments using extensions which are not upstream. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.stats_server_version_override: stats_server_version_override (`UInt64Value `_) Optional proxy version which will be used to set the value of :ref:`server.version statistic ` if specified. Envoy will not process this value, it will be sent as is to :ref:`stats sinks `. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.use_tcp_for_dns_lookups: use_tcp_for_dns_lookups (`bool `_) Always use TCP queries instead of UDP queries for DNS lookups. This may be overridden on a per-cluster basis in cds_config, when :ref:`dns_resolvers ` and :ref:`use_tcp_for_dns_lookups ` are specified. Setting this value causes failure if the ``envoy.restart_features.use_apple_api_for_dns_lookups`` runtime value is true during server startup. Apple' API only uses UDP for DNS resolution. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.bootstrap_extensions: bootstrap_extensions (**repeated** :ref:`config.core.v3.TypedExtensionConfig `) Specifies optional bootstrap extensions to be instantiated at startup time. Each item contains extension specific configuration. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.fatal_actions: fatal_actions (**repeated** :ref:`config.bootstrap.v3.FatalAction `) Specifies optional extensions instantiated at startup time and invoked during crash time on the request that caused the crash. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.default_socket_interface: default_socket_interface (`string `_) Optional overriding of default socket interface. The value must be the name of one of the socket interface factories initialized through a bootstrap extension .. _envoy_v3_api_msg_config.bootstrap.v3.Bootstrap.StaticResources: config.bootstrap.v3.Bootstrap.StaticResources --------------------------------------------- `[config.bootstrap.v3.Bootstrap.StaticResources proto] `_ .. code-block:: json { "listeners": [], "clusters": [], "secrets": [] } .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.StaticResources.listeners: listeners (**repeated** :ref:`config.listener.v3.Listener `) Static :ref:`Listeners `. These listeners are available regardless of LDS configuration. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.StaticResources.clusters: clusters (**repeated** :ref:`config.cluster.v3.Cluster `) If a network based configuration source is specified for :ref:`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 ` (i.e. they should be static IP or DNS-based). .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.StaticResources.secrets: secrets (**repeated** :ref:`extensions.transport_sockets.tls.v3.Secret `) These static secrets can be used by :ref:`SdsSecretConfig ` .. _envoy_v3_api_msg_config.bootstrap.v3.Bootstrap.DynamicResources: config.bootstrap.v3.Bootstrap.DynamicResources ---------------------------------------------- `[config.bootstrap.v3.Bootstrap.DynamicResources proto] `_ .. code-block:: json { "lds_config": "{...}", "cds_config": "{...}", "ads_config": "{...}" } .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.DynamicResources.lds_config: lds_config (:ref:`config.core.v3.ConfigSource `) All :ref:`Listeners ` are provided by a single :ref:`LDS ` configuration source. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.DynamicResources.cds_config: cds_config (:ref:`config.core.v3.ConfigSource `) All post-bootstrap :ref:`Cluster ` definitions are provided by a single :ref:`CDS ` configuration source. .. _envoy_v3_api_field_config.bootstrap.v3.Bootstrap.DynamicResources.ads_config: ads_config (:ref:`config.core.v3.ApiConfigSource `) A single :ref:`ADS ` source may be optionally specified. This must have :ref:`api_type ` :ref:`GRPC `. Only :ref:`ConfigSources ` that have the :ref:`ads ` field set will be streamed on the ADS channel. .. _envoy_v3_api_msg_config.bootstrap.v3.Admin: config.bootstrap.v3.Admin ------------------------- `[config.bootstrap.v3.Admin proto] `_ Administration interface :ref:`operations documentation `. .. code-block:: json { "access_log_path": "...", "profile_path": "...", "address": "{...}", "socket_options": [] } .. _envoy_v3_api_field_config.bootstrap.v3.Admin.access_log_path: access_log_path (`string `_) 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 ` is set. .. _envoy_v3_api_field_config.bootstrap.v3.Admin.profile_path: profile_path (`string `_) The cpu profiler output path for the administration server. If no profile path is specified, the default is ‘/var/log/envoy/envoy.prof’. .. _envoy_v3_api_field_config.bootstrap.v3.Admin.address: address (:ref:`config.core.v3.Address `) The TCP address that the administration server will listen on. If not specified, Envoy will not start an administration server. .. _envoy_v3_api_field_config.bootstrap.v3.Admin.socket_options: socket_options (**repeated** :ref:`config.core.v3.SocketOption `) Additional socket options that may not be present in Envoy source code or precompiled binaries. .. _envoy_v3_api_msg_config.bootstrap.v3.ClusterManager: config.bootstrap.v3.ClusterManager ---------------------------------- `[config.bootstrap.v3.ClusterManager proto] `_ Cluster manager :ref:`architecture overview `. .. code-block:: json { "local_cluster_name": "...", "outlier_detection": "{...}", "upstream_bind_config": "{...}", "load_stats_config": "{...}" } .. _envoy_v3_api_field_config.bootstrap.v3.ClusterManager.local_cluster_name: local_cluster_name (`string `_) Name of the local cluster (i.e., the cluster that owns the Envoy running this configuration). In order to enable :ref:`zone aware routing ` this option must be set. If *local_cluster_name* is defined then :ref:`clusters ` must be defined in the :ref:`Bootstrap static cluster resources `. This is unrelated to the :option:`--service-cluster` option which does not `affect zone aware routing `_. .. _envoy_v3_api_field_config.bootstrap.v3.ClusterManager.outlier_detection: outlier_detection (:ref:`config.bootstrap.v3.ClusterManager.OutlierDetection `) Optional global configuration for outlier detection. .. _envoy_v3_api_field_config.bootstrap.v3.ClusterManager.upstream_bind_config: upstream_bind_config (:ref:`config.core.v3.BindConfig `) 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_v3_api_field_config.bootstrap.v3.ClusterManager.load_stats_config: load_stats_config (:ref:`config.core.v3.ApiConfigSource `) A management server endpoint to stream load stats to via *StreamLoadStats*. This must have :ref:`api_type ` :ref:`GRPC `. .. _envoy_v3_api_msg_config.bootstrap.v3.ClusterManager.OutlierDetection: config.bootstrap.v3.ClusterManager.OutlierDetection --------------------------------------------------- `[config.bootstrap.v3.ClusterManager.OutlierDetection proto] `_ .. code-block:: json { "event_log_path": "..." } .. _envoy_v3_api_field_config.bootstrap.v3.ClusterManager.OutlierDetection.event_log_path: event_log_path (`string `_) Specifies the path to the outlier event log. .. _envoy_v3_api_msg_config.bootstrap.v3.Watchdogs: config.bootstrap.v3.Watchdogs ----------------------------- `[config.bootstrap.v3.Watchdogs proto] `_ Allows you to specify different watchdog configs for different subsystems. This allows finer tuned policies for the watchdog. If a subsystem is omitted the default values for that system will be used. .. code-block:: json { "main_thread_watchdog": "{...}", "worker_watchdog": "{...}" } .. _envoy_v3_api_field_config.bootstrap.v3.Watchdogs.main_thread_watchdog: main_thread_watchdog (:ref:`config.bootstrap.v3.Watchdog `) Watchdog for the main thread. .. _envoy_v3_api_field_config.bootstrap.v3.Watchdogs.worker_watchdog: worker_watchdog (:ref:`config.bootstrap.v3.Watchdog `) Watchdog for the worker threads. .. _envoy_v3_api_msg_config.bootstrap.v3.Watchdog: config.bootstrap.v3.Watchdog ---------------------------- `[config.bootstrap.v3.Watchdog proto] `_ Envoy process watchdog configuration. When configured, this monitors for nonresponsive threads and kills the process after the configured thresholds. See the :ref:`watchdog documentation ` for more information. .. code-block:: json { "actions": [], "miss_timeout": "{...}", "megamiss_timeout": "{...}", "kill_timeout": "{...}", "max_kill_timeout_jitter": "{...}", "multikill_timeout": "{...}", "multikill_threshold": "{...}" } .. _envoy_v3_api_field_config.bootstrap.v3.Watchdog.actions: actions (**repeated** :ref:`config.bootstrap.v3.Watchdog.WatchdogAction `) Register actions that will fire on given WatchDog events. See *WatchDogAction* for priority of events. .. _envoy_v3_api_field_config.bootstrap.v3.Watchdog.miss_timeout: miss_timeout (`Duration `_) The duration after which Envoy counts a nonresponsive thread in the *watchdog_miss* statistic. If not specified the default is 200ms. .. _envoy_v3_api_field_config.bootstrap.v3.Watchdog.megamiss_timeout: megamiss_timeout (`Duration `_) The duration after which Envoy counts a nonresponsive thread in the *watchdog_mega_miss* statistic. If not specified the default is 1000ms. .. _envoy_v3_api_field_config.bootstrap.v3.Watchdog.kill_timeout: kill_timeout (`Duration `_) 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). .. _envoy_v3_api_field_config.bootstrap.v3.Watchdog.max_kill_timeout_jitter: max_kill_timeout_jitter (`Duration `_) Defines the maximum jitter used to adjust the *kill_timeout* if *kill_timeout* is enabled. Enabling this feature would help to reduce risk of synchronized watchdog kill events across proxies due to external triggers. Set to 0 to disable. If not specified the default is 0 (disabled). .. _envoy_v3_api_field_config.bootstrap.v3.Watchdog.multikill_timeout: multikill_timeout (`Duration `_) If max(2, ceil(registered_threads * Fraction(*multikill_threshold*))) threads have been nonresponsive for at least this duration kill the entire Envoy process. Set to 0 to disable this behavior. If not specified the default is 0 (disabled). .. _envoy_v3_api_field_config.bootstrap.v3.Watchdog.multikill_threshold: multikill_threshold (:ref:`type.v3.Percent `) Sets the threshold for *multikill_timeout* in terms of the percentage of nonresponsive threads required for the *multikill_timeout*. If not specified the default is 0. .. _envoy_v3_api_msg_config.bootstrap.v3.Watchdog.WatchdogAction: config.bootstrap.v3.Watchdog.WatchdogAction ------------------------------------------- `[config.bootstrap.v3.Watchdog.WatchdogAction proto] `_ .. code-block:: json { "config": "{...}", "event": "..." } .. _envoy_v3_api_field_config.bootstrap.v3.Watchdog.WatchdogAction.config: config (:ref:`config.core.v3.TypedExtensionConfig `) Extension specific configuration for the action. .. _envoy_v3_api_field_config.bootstrap.v3.Watchdog.WatchdogAction.event: event (:ref:`config.bootstrap.v3.Watchdog.WatchdogAction.WatchdogEvent `) .. _envoy_v3_api_enum_config.bootstrap.v3.Watchdog.WatchdogAction.WatchdogEvent: Enum config.bootstrap.v3.Watchdog.WatchdogAction.WatchdogEvent -------------------------------------------------------------- `[config.bootstrap.v3.Watchdog.WatchdogAction.WatchdogEvent proto] `_ The events are fired in this order: KILL, MULTIKILL, MEGAMISS, MISS. Within an event type, actions execute in the order they are configured. For KILL/MULTIKILL there is a default PANIC that will run after the registered actions and kills the process if it wasn't already killed. It might be useful to specify several debug actions, and possibly an alternate FATAL action. .. _envoy_v3_api_enum_value_config.bootstrap.v3.Watchdog.WatchdogAction.WatchdogEvent.UNKNOWN: UNKNOWN *(DEFAULT)* ⁣ .. _envoy_v3_api_enum_value_config.bootstrap.v3.Watchdog.WatchdogAction.WatchdogEvent.KILL: KILL ⁣ .. _envoy_v3_api_enum_value_config.bootstrap.v3.Watchdog.WatchdogAction.WatchdogEvent.MULTIKILL: MULTIKILL ⁣ .. _envoy_v3_api_enum_value_config.bootstrap.v3.Watchdog.WatchdogAction.WatchdogEvent.MEGAMISS: MEGAMISS ⁣ .. _envoy_v3_api_enum_value_config.bootstrap.v3.Watchdog.WatchdogAction.WatchdogEvent.MISS: MISS ⁣ .. _envoy_v3_api_msg_config.bootstrap.v3.FatalAction: config.bootstrap.v3.FatalAction ------------------------------- `[config.bootstrap.v3.FatalAction proto] `_ Fatal actions to run while crashing. Actions can be safe (meaning they are async-signal safe) or unsafe. We run all safe actions before we run unsafe actions. If using an unsafe action that could get stuck or deadlock, it important to have an out of band system to terminate the process. The interface for the extension is ``Envoy::Server::Configuration::FatalAction``. *FatalAction* extensions live in the ``envoy.extensions.fatal_actions`` API namespace. .. code-block:: json { "config": "{...}" } .. _envoy_v3_api_field_config.bootstrap.v3.FatalAction.config: config (:ref:`config.core.v3.TypedExtensionConfig `) Extension specific configuration for the action. It's expected to conform to the ``Envoy::Server::Configuration::FatalAction`` interface. .. _envoy_v3_api_msg_config.bootstrap.v3.Runtime: config.bootstrap.v3.Runtime --------------------------- `[config.bootstrap.v3.Runtime proto] `_ Runtime :ref:`configuration overview ` (deprecated). .. code-block:: json { "symlink_root": "...", "subdirectory": "...", "override_subdirectory": "...", "base": "{...}" } .. _envoy_v3_api_field_config.bootstrap.v3.Runtime.symlink_root: symlink_root (`string `_) 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. If this parameter is not set, there will be no disk based runtime. .. _envoy_v3_api_field_config.bootstrap.v3.Runtime.subdirectory: subdirectory (`string `_) 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. .. _envoy_v3_api_field_config.bootstrap.v3.Runtime.override_subdirectory: override_subdirectory (`string `_) 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. .. _envoy_v3_api_field_config.bootstrap.v3.Runtime.base: base (`Struct `_) Static base runtime. This will be :ref:`overridden ` by other runtime layers, e.g. disk or admin. This follows the :ref:`runtime protobuf JSON representation encoding `. .. _envoy_v3_api_msg_config.bootstrap.v3.RuntimeLayer: config.bootstrap.v3.RuntimeLayer -------------------------------- `[config.bootstrap.v3.RuntimeLayer proto] `_ .. code-block:: json { "name": "...", "static_layer": "{...}", "disk_layer": "{...}", "admin_layer": "{...}", "rtds_layer": "{...}" } .. _envoy_v3_api_field_config.bootstrap.v3.RuntimeLayer.name: name (`string `_, *REQUIRED*) Descriptive name for the runtime layer. This is only used for the runtime :http:get:`/runtime` output. .. _envoy_v3_api_field_config.bootstrap.v3.RuntimeLayer.static_layer: static_layer (`Struct `_) :ref:`Static runtime ` layer. This follows the :ref:`runtime protobuf JSON representation encoding `. Unlike static xDS resources, this static layer is overridable by later layers in the runtime virtual filesystem. Precisely one of :ref:`static_layer `, :ref:`disk_layer `, :ref:`admin_layer `, :ref:`rtds_layer ` must be set. .. _envoy_v3_api_field_config.bootstrap.v3.RuntimeLayer.disk_layer: disk_layer (:ref:`config.bootstrap.v3.RuntimeLayer.DiskLayer `) Precisely one of :ref:`static_layer `, :ref:`disk_layer `, :ref:`admin_layer `, :ref:`rtds_layer ` must be set. .. _envoy_v3_api_field_config.bootstrap.v3.RuntimeLayer.admin_layer: admin_layer (:ref:`config.bootstrap.v3.RuntimeLayer.AdminLayer `) Precisely one of :ref:`static_layer `, :ref:`disk_layer `, :ref:`admin_layer `, :ref:`rtds_layer ` must be set. .. _envoy_v3_api_field_config.bootstrap.v3.RuntimeLayer.rtds_layer: rtds_layer (:ref:`config.bootstrap.v3.RuntimeLayer.RtdsLayer `) Precisely one of :ref:`static_layer `, :ref:`disk_layer `, :ref:`admin_layer `, :ref:`rtds_layer ` must be set. .. _envoy_v3_api_msg_config.bootstrap.v3.RuntimeLayer.DiskLayer: config.bootstrap.v3.RuntimeLayer.DiskLayer ------------------------------------------ `[config.bootstrap.v3.RuntimeLayer.DiskLayer proto] `_ :ref:`Disk runtime ` layer. .. code-block:: json { "symlink_root": "...", "subdirectory": "...", "append_service_cluster": "..." } .. _envoy_v3_api_field_config.bootstrap.v3.RuntimeLayer.DiskLayer.symlink_root: symlink_root (`string `_) 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. See documentation on runtime :ref:`atomicity ` for further details on how reloads are treated. .. _envoy_v3_api_field_config.bootstrap.v3.RuntimeLayer.DiskLayer.subdirectory: subdirectory (`string `_) 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. .. _envoy_v3_api_field_config.bootstrap.v3.RuntimeLayer.DiskLayer.append_service_cluster: append_service_cluster (`bool `_) :ref:`Append ` the service cluster to the path under symlink root. .. _envoy_v3_api_msg_config.bootstrap.v3.RuntimeLayer.AdminLayer: config.bootstrap.v3.RuntimeLayer.AdminLayer ------------------------------------------- `[config.bootstrap.v3.RuntimeLayer.AdminLayer proto] `_ :ref:`Admin console runtime ` layer. .. code-block:: json {} .. _envoy_v3_api_msg_config.bootstrap.v3.RuntimeLayer.RtdsLayer: config.bootstrap.v3.RuntimeLayer.RtdsLayer ------------------------------------------ `[config.bootstrap.v3.RuntimeLayer.RtdsLayer proto] `_ :ref:`Runtime Discovery Service (RTDS) ` layer. .. code-block:: json { "name": "...", "rtds_config": "{...}" } .. _envoy_v3_api_field_config.bootstrap.v3.RuntimeLayer.RtdsLayer.name: name (`string `_) Resource to subscribe to at *rtds_config* for the RTDS layer. .. _envoy_v3_api_field_config.bootstrap.v3.RuntimeLayer.RtdsLayer.rtds_config: rtds_config (:ref:`config.core.v3.ConfigSource `) RTDS configuration source. .. _envoy_v3_api_msg_config.bootstrap.v3.LayeredRuntime: config.bootstrap.v3.LayeredRuntime ---------------------------------- `[config.bootstrap.v3.LayeredRuntime proto] `_ Runtime :ref:`configuration overview `. .. code-block:: json { "layers": [] } .. _envoy_v3_api_field_config.bootstrap.v3.LayeredRuntime.layers: layers (**repeated** :ref:`config.bootstrap.v3.RuntimeLayer `) The :ref:`layers ` of the runtime. This is ordered such that later layers in the list overlay earlier entries.