Package io.envoyproxy.envoy.config.core.v3

Interface HealthCheckOrBuilder

  • All Superinterfaces:
    com.google.protobuf.MessageLiteOrBuilder, com.google.protobuf.MessageOrBuilder
    All Known Implementing Classes:
    HealthCheck, HealthCheck.Builder
    public interface HealthCheckOrBuilder
extends com.google.protobuf.MessageOrBuilder

    • Method Detail

      • hasTimeout

        boolean hasTimeout()
         The time to wait for a health check response. If the timeout is reached the
 health check attempt will be considered a failure.
        .google.protobuf.Duration timeout = 1 [(.validate.rules) = { ... }

      • getTimeout

        com.google.protobuf.Duration getTimeout()
         The time to wait for a health check response. If the timeout is reached the
 health check attempt will be considered a failure.
        .google.protobuf.Duration timeout = 1 [(.validate.rules) = { ... }

      • getTimeoutOrBuilder

        com.google.protobuf.DurationOrBuilder getTimeoutOrBuilder()
         The time to wait for a health check response. If the timeout is reached the
 health check attempt will be considered a failure.
        .google.protobuf.Duration timeout = 1 [(.validate.rules) = { ... }

      • hasInterval

        boolean hasInterval()
         The interval between health checks.
        .google.protobuf.Duration interval = 2 [(.validate.rules) = { ... }

      • getInterval

        com.google.protobuf.Duration getInterval()
         The interval between health checks.
        .google.protobuf.Duration interval = 2 [(.validate.rules) = { ... }

      • getIntervalOrBuilder

        com.google.protobuf.DurationOrBuilder getIntervalOrBuilder()
         The interval between health checks.
        .google.protobuf.Duration interval = 2 [(.validate.rules) = { ... }

      • hasInitialJitter

        boolean hasInitialJitter()
         An optional jitter amount in milliseconds. If specified, Envoy will start health
 checking after for a random time in ms between 0 and initial_jitter. This only
 applies to the first health check.
        .google.protobuf.Duration initial_jitter = 20;

      • getInitialJitter

        com.google.protobuf.Duration getInitialJitter()
         An optional jitter amount in milliseconds. If specified, Envoy will start health
 checking after for a random time in ms between 0 and initial_jitter. This only
 applies to the first health check.
        .google.protobuf.Duration initial_jitter = 20;

      • getInitialJitterOrBuilder

        com.google.protobuf.DurationOrBuilder getInitialJitterOrBuilder()
         An optional jitter amount in milliseconds. If specified, Envoy will start health
 checking after for a random time in ms between 0 and initial_jitter. This only
 applies to the first health check.
        .google.protobuf.Duration initial_jitter = 20;

      • hasIntervalJitter

        boolean hasIntervalJitter()
         An optional jitter amount in milliseconds. If specified, during every
 interval Envoy will add interval_jitter to the wait time.
        .google.protobuf.Duration interval_jitter = 3;

      • getIntervalJitter

        com.google.protobuf.Duration getIntervalJitter()
         An optional jitter amount in milliseconds. If specified, during every
 interval Envoy will add interval_jitter to the wait time.
        .google.protobuf.Duration interval_jitter = 3;

      • getIntervalJitterOrBuilder

        com.google.protobuf.DurationOrBuilder getIntervalJitterOrBuilder()
         An optional jitter amount in milliseconds. If specified, during every
 interval Envoy will add interval_jitter to the wait time.
        .google.protobuf.Duration interval_jitter = 3;

      • getIntervalJitterPercent

        int getIntervalJitterPercent()
         An optional jitter amount as a percentage of interval_ms. If specified,
 during every interval Envoy will add interval_ms *
 interval_jitter_percent / 100 to the wait time.
 If interval_jitter_ms and interval_jitter_percent are both set, both of
 them will be used to increase the wait time.
        uint32 interval_jitter_percent = 18;

      • hasUnhealthyThreshold

        boolean hasUnhealthyThreshold()
         The number of unhealthy health checks required before a host is marked
 unhealthy. Note that for *http* health checking if a host responds with a code not in
 :ref:`expected_statuses <envoy_v3_api_field_config.core.v3.HealthCheck.HttpHealthCheck.expected_statuses>`
 or :ref:`retriable_statuses <envoy_v3_api_field_config.core.v3.HealthCheck.HttpHealthCheck.retriable_statuses>`,
 this threshold is ignored and the host is considered immediately unhealthy.
        .google.protobuf.UInt32Value unhealthy_threshold = 4 [(.validate.rules) = { ... }

      • getUnhealthyThreshold

        com.google.protobuf.UInt32Value getUnhealthyThreshold()
         The number of unhealthy health checks required before a host is marked
 unhealthy. Note that for *http* health checking if a host responds with a code not in
 :ref:`expected_statuses <envoy_v3_api_field_config.core.v3.HealthCheck.HttpHealthCheck.expected_statuses>`
 or :ref:`retriable_statuses <envoy_v3_api_field_config.core.v3.HealthCheck.HttpHealthCheck.retriable_statuses>`,
 this threshold is ignored and the host is considered immediately unhealthy.
        .google.protobuf.UInt32Value unhealthy_threshold = 4 [(.validate.rules) = { ... }

      • getUnhealthyThresholdOrBuilder

        com.google.protobuf.UInt32ValueOrBuilder getUnhealthyThresholdOrBuilder()
         The number of unhealthy health checks required before a host is marked
 unhealthy. Note that for *http* health checking if a host responds with a code not in
 :ref:`expected_statuses <envoy_v3_api_field_config.core.v3.HealthCheck.HttpHealthCheck.expected_statuses>`
 or :ref:`retriable_statuses <envoy_v3_api_field_config.core.v3.HealthCheck.HttpHealthCheck.retriable_statuses>`,
 this threshold is ignored and the host is considered immediately unhealthy.
        .google.protobuf.UInt32Value unhealthy_threshold = 4 [(.validate.rules) = { ... }

      • hasHealthyThreshold

        boolean hasHealthyThreshold()
         The number of healthy health checks required before a host is marked
 healthy. Note that during startup, only a single successful health check is
 required to mark a host healthy.
        .google.protobuf.UInt32Value healthy_threshold = 5 [(.validate.rules) = { ... }

      • getHealthyThreshold

        com.google.protobuf.UInt32Value getHealthyThreshold()
         The number of healthy health checks required before a host is marked
 healthy. Note that during startup, only a single successful health check is
 required to mark a host healthy.
        .google.protobuf.UInt32Value healthy_threshold = 5 [(.validate.rules) = { ... }

      • getHealthyThresholdOrBuilder

        com.google.protobuf.UInt32ValueOrBuilder getHealthyThresholdOrBuilder()
         The number of healthy health checks required before a host is marked
 healthy. Note that during startup, only a single successful health check is
 required to mark a host healthy.
        .google.protobuf.UInt32Value healthy_threshold = 5 [(.validate.rules) = { ... }

      • hasAltPort

        boolean hasAltPort()
         [#not-implemented-hide:] Non-serving port for health checking.
        .google.protobuf.UInt32Value alt_port = 6;

      • getAltPort

        com.google.protobuf.UInt32Value getAltPort()
         [#not-implemented-hide:] Non-serving port for health checking.
        .google.protobuf.UInt32Value alt_port = 6;

      • getAltPortOrBuilder

        com.google.protobuf.UInt32ValueOrBuilder getAltPortOrBuilder()
         [#not-implemented-hide:] Non-serving port for health checking.
        .google.protobuf.UInt32Value alt_port = 6;

      • hasReuseConnection

        boolean hasReuseConnection()
         Reuse health check connection between health checks. Default is true.
        .google.protobuf.BoolValue reuse_connection = 7;

      • getReuseConnection

        com.google.protobuf.BoolValue getReuseConnection()
         Reuse health check connection between health checks. Default is true.
        .google.protobuf.BoolValue reuse_connection = 7;

      • getReuseConnectionOrBuilder

        com.google.protobuf.BoolValueOrBuilder getReuseConnectionOrBuilder()
         Reuse health check connection between health checks. Default is true.
        .google.protobuf.BoolValue reuse_connection = 7;

      • hasHttpHealthCheck

        boolean hasHttpHealthCheck()
         HTTP health check.
        .envoy.config.core.v3.HealthCheck.HttpHealthCheck http_health_check = 8;

      • getHttpHealthCheck

        HealthCheck.HttpHealthCheck getHttpHealthCheck()
         HTTP health check.
        .envoy.config.core.v3.HealthCheck.HttpHealthCheck http_health_check = 8;

      • getHttpHealthCheckOrBuilder

        HealthCheck.HttpHealthCheckOrBuilder getHttpHealthCheckOrBuilder()
         HTTP health check.
        .envoy.config.core.v3.HealthCheck.HttpHealthCheck http_health_check = 8;

      • hasTcpHealthCheck

        boolean hasTcpHealthCheck()
         TCP health check.
        .envoy.config.core.v3.HealthCheck.TcpHealthCheck tcp_health_check = 9;

      • getTcpHealthCheck

        HealthCheck.TcpHealthCheck getTcpHealthCheck()
         TCP health check.
        .envoy.config.core.v3.HealthCheck.TcpHealthCheck tcp_health_check = 9;

      • getTcpHealthCheckOrBuilder

        HealthCheck.TcpHealthCheckOrBuilder getTcpHealthCheckOrBuilder()
         TCP health check.
        .envoy.config.core.v3.HealthCheck.TcpHealthCheck tcp_health_check = 9;

      • hasGrpcHealthCheck

        boolean hasGrpcHealthCheck()
         gRPC health check.
        .envoy.config.core.v3.HealthCheck.GrpcHealthCheck grpc_health_check = 11;

      • getGrpcHealthCheck

        HealthCheck.GrpcHealthCheck getGrpcHealthCheck()
         gRPC health check.
        .envoy.config.core.v3.HealthCheck.GrpcHealthCheck grpc_health_check = 11;

      • getGrpcHealthCheckOrBuilder

        HealthCheck.GrpcHealthCheckOrBuilder getGrpcHealthCheckOrBuilder()
         gRPC health check.
        .envoy.config.core.v3.HealthCheck.GrpcHealthCheck grpc_health_check = 11;

      • hasCustomHealthCheck

        boolean hasCustomHealthCheck()
         Custom health check.
        .envoy.config.core.v3.HealthCheck.CustomHealthCheck custom_health_check = 13;

      • getCustomHealthCheck

        HealthCheck.CustomHealthCheck getCustomHealthCheck()
         Custom health check.
        .envoy.config.core.v3.HealthCheck.CustomHealthCheck custom_health_check = 13;

      • getCustomHealthCheckOrBuilder

        HealthCheck.CustomHealthCheckOrBuilder getCustomHealthCheckOrBuilder()
         Custom health check.
        .envoy.config.core.v3.HealthCheck.CustomHealthCheck custom_health_check = 13;

      • hasNoTrafficInterval

        boolean hasNoTrafficInterval()
         The "no traffic interval" is a special health check interval that is used when a cluster has
 never had traffic routed to it. This lower interval allows cluster information to be kept up to
 date, without sending a potentially large amount of active health checking traffic for no
 reason. Once a cluster has been used for traffic routing, Envoy will shift back to using the
 standard health check interval that is defined. Note that this interval takes precedence over
 any other.
 The default value for "no traffic interval" is 60 seconds.
        .google.protobuf.Duration no_traffic_interval = 12 [(.validate.rules) = { ... }

      • getNoTrafficInterval

        com.google.protobuf.Duration getNoTrafficInterval()
         The "no traffic interval" is a special health check interval that is used when a cluster has
 never had traffic routed to it. This lower interval allows cluster information to be kept up to
 date, without sending a potentially large amount of active health checking traffic for no
 reason. Once a cluster has been used for traffic routing, Envoy will shift back to using the
 standard health check interval that is defined. Note that this interval takes precedence over
 any other.
 The default value for "no traffic interval" is 60 seconds.
        .google.protobuf.Duration no_traffic_interval = 12 [(.validate.rules) = { ... }

      • getNoTrafficIntervalOrBuilder

        com.google.protobuf.DurationOrBuilder getNoTrafficIntervalOrBuilder()
         The "no traffic interval" is a special health check interval that is used when a cluster has
 never had traffic routed to it. This lower interval allows cluster information to be kept up to
 date, without sending a potentially large amount of active health checking traffic for no
 reason. Once a cluster has been used for traffic routing, Envoy will shift back to using the
 standard health check interval that is defined. Note that this interval takes precedence over
 any other.
 The default value for "no traffic interval" is 60 seconds.
        .google.protobuf.Duration no_traffic_interval = 12 [(.validate.rules) = { ... }

      • hasNoTrafficHealthyInterval

        boolean hasNoTrafficHealthyInterval()
         The "no traffic healthy interval" is a special health check interval that
 is used for hosts that are currently passing active health checking
 (including new hosts) when the cluster has received no traffic.
 This is useful for when we want to send frequent health checks with
 `no_traffic_interval` but then revert to lower frequency `no_traffic_healthy_interval` once
 a host in the cluster is marked as healthy.
 Once a cluster has been used for traffic routing, Envoy will shift back to using the
 standard health check interval that is defined.
 If no_traffic_healthy_interval is not set, it will default to the
 no traffic interval and send that interval regardless of health state.
        .google.protobuf.Duration no_traffic_healthy_interval = 24 [(.validate.rules) = { ... }

      • getNoTrafficHealthyInterval

        com.google.protobuf.Duration getNoTrafficHealthyInterval()
         The "no traffic healthy interval" is a special health check interval that
 is used for hosts that are currently passing active health checking
 (including new hosts) when the cluster has received no traffic.
 This is useful for when we want to send frequent health checks with
 `no_traffic_interval` but then revert to lower frequency `no_traffic_healthy_interval` once
 a host in the cluster is marked as healthy.
 Once a cluster has been used for traffic routing, Envoy will shift back to using the
 standard health check interval that is defined.
 If no_traffic_healthy_interval is not set, it will default to the
 no traffic interval and send that interval regardless of health state.
        .google.protobuf.Duration no_traffic_healthy_interval = 24 [(.validate.rules) = { ... }

      • getNoTrafficHealthyIntervalOrBuilder

        com.google.protobuf.DurationOrBuilder getNoTrafficHealthyIntervalOrBuilder()
         The "no traffic healthy interval" is a special health check interval that
 is used for hosts that are currently passing active health checking
 (including new hosts) when the cluster has received no traffic.
 This is useful for when we want to send frequent health checks with
 `no_traffic_interval` but then revert to lower frequency `no_traffic_healthy_interval` once
 a host in the cluster is marked as healthy.
 Once a cluster has been used for traffic routing, Envoy will shift back to using the
 standard health check interval that is defined.
 If no_traffic_healthy_interval is not set, it will default to the
 no traffic interval and send that interval regardless of health state.
        .google.protobuf.Duration no_traffic_healthy_interval = 24 [(.validate.rules) = { ... }

      • hasUnhealthyInterval

        boolean hasUnhealthyInterval()
         The "unhealthy interval" is a health check interval that is used for hosts that are marked as
 unhealthy. As soon as the host is marked as healthy, Envoy will shift back to using the
 standard health check interval that is defined.
 The default value for "unhealthy interval" is the same as "interval".
        .google.protobuf.Duration unhealthy_interval = 14 [(.validate.rules) = { ... }

      • getUnhealthyInterval

        com.google.protobuf.Duration getUnhealthyInterval()
         The "unhealthy interval" is a health check interval that is used for hosts that are marked as
 unhealthy. As soon as the host is marked as healthy, Envoy will shift back to using the
 standard health check interval that is defined.
 The default value for "unhealthy interval" is the same as "interval".
        .google.protobuf.Duration unhealthy_interval = 14 [(.validate.rules) = { ... }

      • getUnhealthyIntervalOrBuilder

        com.google.protobuf.DurationOrBuilder getUnhealthyIntervalOrBuilder()
         The "unhealthy interval" is a health check interval that is used for hosts that are marked as
 unhealthy. As soon as the host is marked as healthy, Envoy will shift back to using the
 standard health check interval that is defined.
 The default value for "unhealthy interval" is the same as "interval".
        .google.protobuf.Duration unhealthy_interval = 14 [(.validate.rules) = { ... }

      • hasUnhealthyEdgeInterval

        boolean hasUnhealthyEdgeInterval()
         The "unhealthy edge interval" is a special health check interval that is used for the first
 health check right after a host is marked as unhealthy. For subsequent health checks
 Envoy will shift back to using either "unhealthy interval" if present or the standard health
 check interval that is defined.
 The default value for "unhealthy edge interval" is the same as "unhealthy interval".
        .google.protobuf.Duration unhealthy_edge_interval = 15 [(.validate.rules) = { ... }

      • getUnhealthyEdgeInterval

        com.google.protobuf.Duration getUnhealthyEdgeInterval()
         The "unhealthy edge interval" is a special health check interval that is used for the first
 health check right after a host is marked as unhealthy. For subsequent health checks
 Envoy will shift back to using either "unhealthy interval" if present or the standard health
 check interval that is defined.
 The default value for "unhealthy edge interval" is the same as "unhealthy interval".
        .google.protobuf.Duration unhealthy_edge_interval = 15 [(.validate.rules) = { ... }

      • getUnhealthyEdgeIntervalOrBuilder

        com.google.protobuf.DurationOrBuilder getUnhealthyEdgeIntervalOrBuilder()
         The "unhealthy edge interval" is a special health check interval that is used for the first
 health check right after a host is marked as unhealthy. For subsequent health checks
 Envoy will shift back to using either "unhealthy interval" if present or the standard health
 check interval that is defined.
 The default value for "unhealthy edge interval" is the same as "unhealthy interval".
        .google.protobuf.Duration unhealthy_edge_interval = 15 [(.validate.rules) = { ... }

      • hasHealthyEdgeInterval

        boolean hasHealthyEdgeInterval()
         The "healthy edge interval" is a special health check interval that is used for the first
 health check right after a host is marked as healthy. For subsequent health checks
 Envoy will shift back to using the standard health check interval that is defined.
 The default value for "healthy edge interval" is the same as the default interval.
        .google.protobuf.Duration healthy_edge_interval = 16 [(.validate.rules) = { ... }

      • getHealthyEdgeInterval

        com.google.protobuf.Duration getHealthyEdgeInterval()
         The "healthy edge interval" is a special health check interval that is used for the first
 health check right after a host is marked as healthy. For subsequent health checks
 Envoy will shift back to using the standard health check interval that is defined.
 The default value for "healthy edge interval" is the same as the default interval.
        .google.protobuf.Duration healthy_edge_interval = 16 [(.validate.rules) = { ... }

      • getHealthyEdgeIntervalOrBuilder

        com.google.protobuf.DurationOrBuilder getHealthyEdgeIntervalOrBuilder()
         The "healthy edge interval" is a special health check interval that is used for the first
 health check right after a host is marked as healthy. For subsequent health checks
 Envoy will shift back to using the standard health check interval that is defined.
 The default value for "healthy edge interval" is the same as the default interval.
        .google.protobuf.Duration healthy_edge_interval = 16 [(.validate.rules) = { ... }

      • getEventLogPath

        String getEventLogPath()
         Specifies the path to the :ref:`health check event log <arch_overview_health_check_logging>`.
 If empty, no event log will be written.
        string event_log_path = 17;

      • getEventLogPathBytes

        com.google.protobuf.ByteString getEventLogPathBytes()
         Specifies the path to the :ref:`health check event log <arch_overview_health_check_logging>`.
 If empty, no event log will be written.
        string event_log_path = 17;

      • hasEventService

        boolean hasEventService()
         [#not-implemented-hide:]
 The gRPC service for the health check event service.
 If empty, health check events won't be sent to a remote endpoint.
        .envoy.config.core.v3.EventServiceConfig event_service = 22;

      • getEventService

        EventServiceConfig getEventService()
         [#not-implemented-hide:]
 The gRPC service for the health check event service.
 If empty, health check events won't be sent to a remote endpoint.
        .envoy.config.core.v3.EventServiceConfig event_service = 22;

      • getEventServiceOrBuilder

        EventServiceConfigOrBuilder getEventServiceOrBuilder()
         [#not-implemented-hide:]
 The gRPC service for the health check event service.
 If empty, health check events won't be sent to a remote endpoint.
        .envoy.config.core.v3.EventServiceConfig event_service = 22;

      • getAlwaysLogHealthCheckFailures

        boolean getAlwaysLogHealthCheckFailures()
         If set to true, health check failure events will always be logged. If set to false, only the
 initial health check failure event will be logged.
 The default value is false.
        bool always_log_health_check_failures = 19;

      • hasTlsOptions

        boolean hasTlsOptions()
         This allows overriding the cluster TLS settings, just for health check connections.
        .envoy.config.core.v3.HealthCheck.TlsOptions tls_options = 21;

      • getTlsOptions

        HealthCheck.TlsOptions getTlsOptions()
         This allows overriding the cluster TLS settings, just for health check connections.
        .envoy.config.core.v3.HealthCheck.TlsOptions tls_options = 21;

      • getTlsOptionsOrBuilder

        HealthCheck.TlsOptionsOrBuilder getTlsOptionsOrBuilder()
         This allows overriding the cluster TLS settings, just for health check connections.
        .envoy.config.core.v3.HealthCheck.TlsOptions tls_options = 21;

      • hasTransportSocketMatchCriteria

        boolean hasTransportSocketMatchCriteria()
         Optional key/value pairs that will be used to match a transport socket from those specified in the cluster's
 :ref:`tranport socket matches <envoy_v3_api_field_config.cluster.v3.Cluster.transport_socket_matches>`.
 For example, the following match criteria
 .. code-block:: yaml
  transport_socket_match_criteria:
    useMTLS: true
 Will match the following :ref:`cluster socket match <envoy_v3_api_msg_config.cluster.v3.Cluster.TransportSocketMatch>`
 .. code-block:: yaml
  transport_socket_matches:
  - name: "useMTLS"
    match:
      useMTLS: true
    transport_socket:
      name: envoy.transport_sockets.tls
      config: { ... } # tls socket configuration
 If this field is set, then for health checks it will supersede an entry of *envoy.transport_socket* in the
 :ref:`LbEndpoint.Metadata <envoy_v3_api_field_config.endpoint.v3.LbEndpoint.metadata>`.
 This allows using different transport socket capabilities for health checking versus proxying to the
 endpoint.
 If the key/values pairs specified do not match any
 :ref:`transport socket matches <envoy_v3_api_field_config.cluster.v3.Cluster.transport_socket_matches>`,
 the cluster's :ref:`transport socket <envoy_v3_api_field_config.cluster.v3.Cluster.transport_socket>`
 will be used for health check socket configuration.
        .google.protobuf.Struct transport_socket_match_criteria = 23;

      • getTransportSocketMatchCriteria

        com.google.protobuf.Struct getTransportSocketMatchCriteria()
         Optional key/value pairs that will be used to match a transport socket from those specified in the cluster's
 :ref:`tranport socket matches <envoy_v3_api_field_config.cluster.v3.Cluster.transport_socket_matches>`.
 For example, the following match criteria
 .. code-block:: yaml
  transport_socket_match_criteria:
    useMTLS: true
 Will match the following :ref:`cluster socket match <envoy_v3_api_msg_config.cluster.v3.Cluster.TransportSocketMatch>`
 .. code-block:: yaml
  transport_socket_matches:
  - name: "useMTLS"
    match:
      useMTLS: true
    transport_socket:
      name: envoy.transport_sockets.tls
      config: { ... } # tls socket configuration
 If this field is set, then for health checks it will supersede an entry of *envoy.transport_socket* in the
 :ref:`LbEndpoint.Metadata <envoy_v3_api_field_config.endpoint.v3.LbEndpoint.metadata>`.
 This allows using different transport socket capabilities for health checking versus proxying to the
 endpoint.
 If the key/values pairs specified do not match any
 :ref:`transport socket matches <envoy_v3_api_field_config.cluster.v3.Cluster.transport_socket_matches>`,
 the cluster's :ref:`transport socket <envoy_v3_api_field_config.cluster.v3.Cluster.transport_socket>`
 will be used for health check socket configuration.
        .google.protobuf.Struct transport_socket_match_criteria = 23;

      • getTransportSocketMatchCriteriaOrBuilder

        com.google.protobuf.StructOrBuilder getTransportSocketMatchCriteriaOrBuilder()
         Optional key/value pairs that will be used to match a transport socket from those specified in the cluster's
 :ref:`tranport socket matches <envoy_v3_api_field_config.cluster.v3.Cluster.transport_socket_matches>`.
 For example, the following match criteria
 .. code-block:: yaml
  transport_socket_match_criteria:
    useMTLS: true
 Will match the following :ref:`cluster socket match <envoy_v3_api_msg_config.cluster.v3.Cluster.TransportSocketMatch>`
 .. code-block:: yaml
  transport_socket_matches:
  - name: "useMTLS"
    match:
      useMTLS: true
    transport_socket:
      name: envoy.transport_sockets.tls
      config: { ... } # tls socket configuration
 If this field is set, then for health checks it will supersede an entry of *envoy.transport_socket* in the
 :ref:`LbEndpoint.Metadata <envoy_v3_api_field_config.endpoint.v3.LbEndpoint.metadata>`.
 This allows using different transport socket capabilities for health checking versus proxying to the
 endpoint.
 If the key/values pairs specified do not match any
 :ref:`transport socket matches <envoy_v3_api_field_config.cluster.v3.Cluster.transport_socket_matches>`,
 the cluster's :ref:`transport socket <envoy_v3_api_field_config.cluster.v3.Cluster.transport_socket>`
 will be used for health check socket configuration.
        .google.protobuf.Struct transport_socket_match_criteria = 23;