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    REST Resource: healthChecks

    Resource: HealthCheck

    Represents a health check resource.

    Google Compute Engine has two health check resources:

    These health check resources can be used for load balancing and for autohealing VMs in a managed instance group (MIG).

    Load balancing

    Health check requirements vary depending on the type of load balancer. For details about the type of health check supported for each load balancer and corresponding backend type, see Health checks overview: Load balancer guide .

    Autohealing in MIGs

    The health checks that you use for autohealing VMs in a MIG can be either regional or global. For more information, see Set up an application health check and autohealing .

    For more information, see Health checks overview .

    JSON representation 
     { 
 "kind" 
 : 
 string 
 , 
 "id" 
 : 
 string 
 , 
 "creationTimestamp" 
 : 
 string 
 , 
 "name" 
 : 
 string 
 , 
 "description" 
 : 
 string 
 , 
 "checkIntervalSec" 
 : 
 integer 
 , 
 "timeoutSec" 
 : 
 integer 
 , 
 "unhealthyThreshold" 
 : 
 integer 
 , 
 "healthyThreshold" 
 : 
 integer 
 , 
 "type" 
 : 
 enum 
 , 
 "tcpHealthCheck" 
 : 
 { 
 "port" 
 : 
 integer 
 , 
 "portName" 
 : 
 string 
 , 
 "portSpecification" 
 : 
 enum 
 , 
 "request" 
 : 
 string 
 , 
 "response" 
 : 
 string 
 , 
 "proxyHeader" 
 : 
 enum 
 } 
 , 
 "sslHealthCheck" 
 : 
 { 
 "port" 
 : 
 integer 
 , 
 "portName" 
 : 
 string 
 , 
 "portSpecification" 
 : 
 enum 
 , 
 "request" 
 : 
 string 
 , 
 "response" 
 : 
 string 
 , 
 "proxyHeader" 
 : 
 enum 
 } 
 , 
 "httpHealthCheck" 
 : 
 { 
 "port" 
 : 
 integer 
 , 
 "portName" 
 : 
 string 
 , 
 "portSpecification" 
 : 
 enum 
 , 
 "host" 
 : 
 string 
 , 
 "requestPath" 
 : 
 string 
 , 
 "proxyHeader" 
 : 
 enum 
 , 
 "response" 
 : 
 string 
 } 
 , 
 "httpsHealthCheck" 
 : 
 { 
 "port" 
 : 
 integer 
 , 
 "portName" 
 : 
 string 
 , 
 "portSpecification" 
 : 
 enum 
 , 
 "host" 
 : 
 string 
 , 
 "requestPath" 
 : 
 string 
 , 
 "proxyHeader" 
 : 
 enum 
 , 
 "response" 
 : 
 string 
 } 
 , 
 "http2HealthCheck" 
 : 
 { 
 "port" 
 : 
 integer 
 , 
 "portName" 
 : 
 string 
 , 
 "portSpecification" 
 : 
 enum 
 , 
 "host" 
 : 
 string 
 , 
 "requestPath" 
 : 
 string 
 , 
 "proxyHeader" 
 : 
 enum 
 , 
 "response" 
 : 
 string 
 } 
 , 
 "grpcHealthCheck" 
 : 
 { 
 "port" 
 : 
 integer 
 , 
 "portName" 
 : 
 string 
 , 
 "portSpecification" 
 : 
 enum 
 , 
 "grpcServiceName" 
 : 
 string 
 } 
 , 
 "grpcTlsHealthCheck" 
 : 
 { 
 "port" 
 : 
 integer 
 , 
 "portSpecification" 
 : 
 enum 
 , 
 "grpcServiceName" 
 : 
 string 
 } 
 , 
 "sourceRegions" 
 : 
 [ 
 string 
 ] 
 , 
 "selfLink" 
 : 
 string 
 , 
 "region" 
 : 
 string 
 , 
 "logConfig" 
 : 
 { 
 "enable" 
 : 
 boolean 
 } 
 }
    Fields
    kind

    string

    Type of the resource.

    id

    string ( uint64 format)

    [Output Only] The unique identifier for the resource. This identifier is defined by the server.

    creationTimestamp

    string

    [Output Only] Creation timestamp in 3339 text format.

    name

    string

    Name of the resource. Provided by the client when the resource is created. The name must be 1-63 characters long, and comply with RFC1035 . For example, a name that is 1-63 characters long, matches the regular expression [a-z]([-a-z0-9]*[a-z0-9])? , and otherwise complies with RFC1035. This regular expression describes a name where the first character is a lowercase letter, and all following characters are a dash, lowercase letter, or digit, except the last character, which isn't a dash.

    description

    string

    An optional description of this resource. Provide this property when you create the resource.

    checkIntervalSec

    integer

    How often (in seconds) to send a health check. The default value is 5 seconds.

    timeoutSec

    integer

    How long (in seconds) to wait before claiming failure. The default value is 5 seconds. It is invalid for timeoutSec to have greater value than checkIntervalSec .

    unhealthyThreshold

    integer

    A so-far healthy instance will be marked unhealthy after this many consecutive failures. The default value is 2.

    healthyThreshold

    integer

    A so-far unhealthy instance will be marked healthy after this many consecutive successes. The default value is 2.

    type

    enum

    Specifies the type of the healthCheck, either TCP , SSL , HTTP , HTTPS , HTTP2 or GRPC . Exactly one of the protocol-specific health check fields must be specified, which must match type field.

    tcpHealthCheck

    object

    tcpHealthCheck.port

    integer

    The TCP port number to which the health check prober sends packets. The default value is 80 . Valid values are 1 through 65535 .

    tcpHealthCheck.portName

    string

    Not supported.

    tcpHealthCheck.portSpecification

    enum

    Specifies how a port is selected for health checking. Can be one of the following values:
    USE_FIXED_PORT : Specifies a port number explicitly using the port field in the health check. Supported by backend services for passthrough load balancers and backend services for proxy load balancers. Not supported by target pools. The health check supports all backends supported by the backend service provided the backend can be health checked. For example, GCE_VM_IP network endpoint groups, GCE_VM_IP_PORT network endpoint groups, and instance group backends.
    USE_NAMED_PORT : Not supported.
    USE_SERVING_PORT : Provides an indirect method of specifying the health check port by referring to the backend service. Only supported by backend services for proxy load balancers. Not supported by target pools. Not supported by backend services for passthrough load balancers. Supports all backends that can be health checked; for example, GCE_VM_IP_PORT network endpoint groups and instance group backends.
    For GCE_VM_IP_PORT network endpoint group backends, the health check uses the port number specified for each endpoint in the network endpoint group. For instance group backends, the health check uses the port number determined by looking up the backend service's named port in the instance group's list of named ports.

    tcpHealthCheck.request

    string

    Instructs the health check prober to send this exact ASCII string, up to 1024 bytes in length, after establishing the TCP connection.

    tcpHealthCheck.response

    string

    Creates a content-based TCP health check. In addition to establishing a TCP connection, you can configure the health check to pass only when the backend sends this exact response ASCII string, up to 1024 bytes in length. For details, see: https://cloud.google.com/load-balancing/docs/health-check-concepts#criteria-protocol-ssl-tcp

    tcpHealthCheck.proxyHeader

    enum

    Specifies the type of proxy header to append before sending data to the backend, either NONE or PROXY_V1 . The default is NONE .

    sslHealthCheck

    object

    sslHealthCheck.port

    integer

    The TCP port number to which the health check prober sends packets. The default value is 443 . Valid values are 1 through 65535 .

    sslHealthCheck.portName

    string

    Not supported.

    sslHealthCheck.portSpecification

    enum

    Specifies how a port is selected for health checking. Can be one of the following values:
    USE_FIXED_PORT : Specifies a port number explicitly using the port field in the health check. Supported by backend services for passthrough load balancers and backend services for proxy load balancers. Not supported by target pools. The health check supports all backends supported by the backend service provided the backend can be health checked. For example, GCE_VM_IP network endpoint groups, GCE_VM_IP_PORT network endpoint groups, and instance group backends.
    USE_NAMED_PORT : Not supported.
    USE_SERVING_PORT : Provides an indirect method of specifying the health check port by referring to the backend service. Only supported by backend services for proxy load balancers. Not supported by target pools. Not supported by backend services for passthrough load balancers. Supports all backends that can be health checked; for example, GCE_VM_IP_PORT network endpoint groups and instance group backends.
    For GCE_VM_IP_PORT network endpoint group backends, the health check uses the port number specified for each endpoint in the network endpoint group. For instance group backends, the health check uses the port number determined by looking up the backend service's named port in the instance group's list of named ports.

    sslHealthCheck.request

    string

    Instructs the health check prober to send this exact ASCII string, up to 1024 bytes in length, after establishing the TCP connection and SSL handshake.

    sslHealthCheck.response

    string

    Creates a content-based SSL health check. In addition to establishing a TCP connection and the TLS handshake, you can configure the health check to pass only when the backend sends this exact response ASCII string, up to 1024 bytes in length. For details, see: https://cloud.google.com/load-balancing/docs/health-check-concepts#criteria-protocol-ssl-tcp

    sslHealthCheck.proxyHeader

    enum

    Specifies the type of proxy header to append before sending data to the backend, either NONE or PROXY_V1 . The default is NONE .

    httpHealthCheck

    object

    httpHealthCheck.port

    integer

    The TCP port number to which the health check prober sends packets. The default value is 80 . Valid values are 1 through 65535 .

    httpHealthCheck.portName

    string

    Not supported.

    httpHealthCheck.portSpecification

    enum

    Specifies how a port is selected for health checking. Can be one of the following values:
    USE_FIXED_PORT : Specifies a port number explicitly using the port field in the health check. Supported by backend services for passthrough load balancers and backend services for proxy load balancers. Also supported in legacy HTTP health checks for target pools. The health check supports all backends supported by the backend service provided the backend can be health checked. For example, GCE_VM_IP network endpoint groups, GCE_VM_IP_PORT network endpoint groups, and instance group backends.
    USE_NAMED_PORT : Not supported.
    USE_SERVING_PORT : Provides an indirect method of specifying the health check port by referring to the backend service. Only supported by backend services for proxy load balancers. Not supported by target pools. Not supported by backend services for pass-through load balancers. Supports all backends that can be health checked; for example, GCE_VM_IP_PORT network endpoint groups and instance group backends.
    For GCE_VM_IP_PORT network endpoint group backends, the health check uses the port number specified for each endpoint in the network endpoint group. For instance group backends, the health check uses the port number determined by looking up the backend service's named port in the instance group's list of named ports.

    httpHealthCheck.host

    string

    The value of the host header in the HTTP health check request. If left empty (default value), the host header is set to the destination IP address to which health check packets are sent. The destination IP address depends on the type of load balancer. For details, see: https://cloud.google.com/load-balancing/docs/health-check-concepts#hc-packet-dest

    httpHealthCheck.requestPath

    string

    The request path of the HTTP health check request. The default value is / . Must comply with RFC3986 .

    httpHealthCheck.proxyHeader

    enum

    Specifies the type of proxy header to append before sending data to the backend, either NONE or PROXY_V1 . The default is NONE .

    httpHealthCheck.response

    string

    Creates a content-based HTTP health check. In addition to the required HTTP 200 (OK) status code, you can configure the health check to pass only when the backend sends this specific ASCII response string within the first 1024 bytes of the HTTP response body. For details, see: https://cloud.google.com/load-balancing/docs/health-check-concepts#criteria-protocol-http

    httpsHealthCheck

    object

    httpsHealthCheck.port

    integer

    The TCP port number to which the health check prober sends packets. The default value is 443 . Valid values are 1 through 65535 .

    httpsHealthCheck.portName

    string

    Not supported.

    httpsHealthCheck.portSpecification

    enum

    Specifies how a port is selected for health checking. Can be one of the following values:
    USE_FIXED_PORT : Specifies a port number explicitly using the port field in the health check. Supported by backend services for passthrough load balancers and backend services for proxy load balancers. Not supported by target pools. The health check supports all backends supported by the backend service provided the backend can be health checked. For example, GCE_VM_IP network endpoint groups, GCE_VM_IP_PORT network endpoint groups, and instance group backends.
    USE_NAMED_PORT : Not supported.
    USE_SERVING_PORT : Provides an indirect method of specifying the health check port by referring to the backend service. Only supported by backend services for proxy load balancers. Not supported by target pools. Not supported by backend services for passthrough load balancers. Supports all backends that can be health checked; for example, GCE_VM_IP_PORT network endpoint groups and instance group backends.
    For GCE_VM_IP_PORT network endpoint group backends, the health check uses the port number specified for each endpoint in the network endpoint group. For instance group backends, the health check uses the port number determined by looking up the backend service's named port in the instance group's list of named ports.

    httpsHealthCheck.host

    string

    The value of the host header in the HTTPS health check request. If left empty (default value), the host header is set to the destination IP address to which health check packets are sent. The destination IP address depends on the type of load balancer. For details, see: https://cloud.google.com/load-balancing/docs/health-check-concepts#hc-packet-dest

    httpsHealthCheck.requestPath

    string

    The request path of the HTTPS health check request. The default value is / . Must comply with RFC3986 .

    httpsHealthCheck.proxyHeader

    enum

    Specifies the type of proxy header to append before sending data to the backend, either NONE or PROXY_V1 . The default is NONE .

    httpsHealthCheck.response

    string

    Creates a content-based HTTPS health check. In addition to the required HTTP 200 (OK) status code, you can configure the health check to pass only when the backend sends this specific ASCII response string within the first 1024 bytes of the HTTP response body. For details, see: https://cloud.google.com/load-balancing/docs/health-check-concepts#criteria-protocol-http

    http2HealthCheck

    object

    http2HealthCheck.port

    integer

    The TCP port number to which the health check prober sends packets. The default value is 443 . Valid values are 1 through 65535 .

    http2HealthCheck.portName

    string

    Not supported.

    http2HealthCheck.portSpecification

    enum

    Specifies how a port is selected for health checking. Can be one of the following values:
    USE_FIXED_PORT : Specifies a port number explicitly using the port field in the health check. Supported by backend services for passthrough load balancers and backend services for proxy load balancers. Not supported by target pools. The health check supports all backends supported by the backend service provided the backend can be health checked. For example, GCE_VM_IP network endpoint groups, GCE_VM_IP_PORT network endpoint groups, and instance group backends.
    USE_NAMED_PORT : Not supported.
    USE_SERVING_PORT : Provides an indirect method of specifying the health check port by referring to the backend service. Only supported by backend services for proxy load balancers. Not supported by target pools. Not supported by backend services for passthrough load balancers. Supports all backends that can be health checked; for example, GCE_VM_IP_PORT network endpoint groups and instance group backends.
    For GCE_VM_IP_PORT network endpoint group backends, the health check uses the port number specified for each endpoint in the network endpoint group. For instance group backends, the health check uses the port number determined by looking up the backend service's named port in the instance group's list of named ports.

    http2HealthCheck.host

    string

    The value of the host header in the HTTP/2 health check request. If left empty (default value), the host header is set to the destination IP address to which health check packets are sent. The destination IP address depends on the type of load balancer. For details, see: https://cloud.google.com/load-balancing/docs/health-check-concepts#hc-packet-dest

    http2HealthCheck.requestPath

    string

    The request path of the HTTP/2 health check request. The default value is / . Must comply with RFC3986 .

    http2HealthCheck.proxyHeader

    enum

    Specifies the type of proxy header to append before sending data to the backend, either NONE or PROXY_V1 . The default is NONE .

    http2HealthCheck.response

    string

    Creates a content-based HTTP/2 health check. In addition to the required HTTP 200 (OK) status code, you can configure the health check to pass only when the backend sends this specific ASCII response string within the first 1024 bytes of the HTTP response body. For details, see: https://cloud.google.com/load-balancing/docs/health-check-concepts#criteria-protocol-http

    grpcHealthCheck

    object

    grpcHealthCheck.port

    integer

    The TCP port number to which the health check prober sends packets. Valid values are 1 through 65535 .

    grpcHealthCheck.portName

    string

    Not supported.

    grpcHealthCheck.portSpecification

    enum

    Specifies how a port is selected for health checking. Can be one of the following values:
    USE_FIXED_PORT : Specifies a port number explicitly using the port field in the health check. Supported by backend services for passthrough load balancers and backend services for proxy load balancers. Not supported by target pools. The health check supports all backends supported by the backend service provided the backend can be health checked. For example, GCE_VM_IP network endpoint groups, GCE_VM_IP_PORT network endpoint groups, and instance group backends.
    USE_NAMED_PORT : Not supported.
    USE_SERVING_PORT : Provides an indirect method of specifying the health check port by referring to the backend service. Only supported by backend services for proxy load balancers. Not supported by target pools. Not supported by backend services for passthrough load balancers. Supports all backends that can be health checked; for example, GCE_VM_IP_PORT network endpoint groups and instance group backends.
    For GCE_VM_IP_PORT network endpoint group backends, the health check uses the port number specified for each endpoint in the network endpoint group. For instance group backends, the health check uses the port number determined by looking up the backend service's named port in the instance group's list of named ports.

    grpcHealthCheck.grpcServiceName

    string

    The gRPC service name for the health check. This field is optional. The value of grpcServiceName has the following meanings by convention:
    - Empty serviceName means the overall status of all services at the backend.- Non-empty serviceName means the health of that gRPC service, as defined by the owner of the service.
    The grpcServiceName can only be ASCII.

    grpcTlsHealthCheck

    object

    grpcTlsHealthCheck.port

    integer

    The TCP port number to which the health check prober sends packets. Valid values are 1 through 65535 .

    grpcTlsHealthCheck.portSpecification

    enum

    Specifies how a port is selected for health checking. Can be one of the following values:
    USE_FIXED_PORT : Specifies a port number explicitly using the port field in the health check. Supported by backend services for passthrough load balancers and backend services for proxy load balancers. Not supported by target pools. The health check supports all backends supported by the backend service provided the backend can be health checked. For example, GCE_VM_IP network endpoint groups, GCE_VM_IP_PORT network endpoint groups, and instance group backends.
    USE_NAMED_PORT : Not supported.
    USE_SERVING_PORT : Provides an indirect method of specifying the health check port by referring to the backend service. Only supported by backend services for proxy load balancers. Not supported by target pools. Not supported by backend services for passthrough load balancers. Supports all backends that can be health checked; for example, GCE_VM_IP_PORT network endpoint groups and instance group backends.
    For GCE_VM_IP_PORT network endpoint group backends, the health check uses the port number specified for each endpoint in the network endpoint group. For instance group backends, the health check uses the port number determined by looking up the backend service's named port in the instance group's list of named ports.

    grpcTlsHealthCheck.grpcServiceName

    string

    The gRPC service name for the health check. This field is optional. The value of grpcServiceName has the following meanings by convention:
    - Empty serviceName means the overall status of all services at the backend.- Non-empty serviceName means the health of that gRPC service, as defined by the owner of the service.
    The grpcServiceName can only be ASCII.

    sourceRegions[]

    string

    The list of cloud regions from which health checks are performed. If any regions are specified, then exactly 3 regions should be specified. The region names must be valid names of Google Cloud regions. This can only be set for global health check. If this list is non-empty, then there are restrictions on what other health check fields are supported and what other resources can use this health check:

    • SSL, HTTP2, and GRPC protocols are not supported.
    • The TCP request field is not supported.
    • The proxyHeader field for HTTP, HTTPS, and TCP is not supported.
    • The checkIntervalSec field must be at least 30.
    • The health check cannot be used with BackendService nor with managed instance group auto-healing.
    region

    string

    [Output Only] Region where the health check resides. Not applicable to global health checks.

    logConfig

    object

    Configure logging on this health check.

    logConfig.enable

    boolean

    Indicates whether or not to export logs. This is false by default, which means no health check logging will be done.

    Methods

    aggregatedList

    		Retrieves the list of all HealthCheck resources, regional and global, available to the specified project.

    delete

    		Deletes the specified HealthCheck resource.

    get

    		Returns the specified HealthCheck resource.

    insert

    		Creates a HealthCheck resource in the specified project using the data included in the request.

    list

    		Retrieves the list of HealthCheck resources available to the specified project.

    patch

    		Updates a HealthCheck resource in the specified project using the data included in the request.

    testIamPermissions

    		Returns permissions that a caller has on the specified resource.

    update

    		Updates a HealthCheck resource in the specified project using the data included in the request.
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