REST Resource: subnetworks

Resource: Subnetwork

Represents a Subnetwork resource.

A subnetwork (also known as a subnet) is a logical partition of a Virtual Private Cloud network with one primary IP range and zero or more secondary IP ranges. For more information, read Virtual Private Cloud (VPC) Network.

JSON representation 
{
  "id": string,
  "creationTimestamp": string,
  "name": string,
  "description": string,
  "network": string,
  "ipCidrRange": string,
  "gatewayAddress": string,
  "region": string,
  "selfLink": string,
  "privateIpGoogleAccess": boolean,
  "secondaryIpRanges": [
    {
      "rangeName": string,
      "ipCidrRange": string
    }
  ],
  "fingerprint": string,
  "enableFlowLogs": boolean,
  "privateIpv6GoogleAccess": enum,
  "ipv6CidrRange": string,
  "externalIpv6Prefix": string,
  "purpose": enum,
  "role": enum,
  "state": enum,
  "logConfig": {
    "enable": boolean,
    "aggregationInterval": enum,
    "flowSampling": number,
    "metadata": enum,
    "metadataFields": [
      string
    ],
    "filterExpr": string
  },
  "stackType": enum,
  "ipv6AccessType": enum,
  "kind": string
}
Fields
id

string (fixed64 format)

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

string

[Output Only] Creation timestamp in RFC3339 text format.
name

string

The name of the resource, provided by the client when initially creating the resource. The name must be 1-63 characters long, and comply with RFC1035. Specifically, the name must be 1-63 characters long and match the regular expression [a-z]([-a-z0-9]*[a-z0-9])? which means the first character must be a lowercase letter, and all following characters must be a dash, lowercase letter, or digit, except the last character, which cannot be a dash.
description

string

An optional description of this resource. Provide this property when you create the resource. This field can be set only at resource creation time.
network

string

The URL of the network to which this subnetwork belongs, provided by the client when initially creating the subnetwork. Only networks that are in the distributed mode can have subnetworks. This field can be set only at resource creation time.
ipCidrRange

string

The range of internal addresses that are owned by this subnetwork. Provide this property when you create the subnetwork. For example, 10.0.0.0/8 or 100.64.0.0/10. Ranges must be unique and non-overlapping within a network. Only IPv4 is supported. This field is set at resource creation time. The range can be any range listed in the Valid ranges list. The range can be expanded after creation using expandIpCidrRange.
gatewayAddress

string

[Output Only] The gateway address for default routes to reach destination addresses outside this subnetwork.
region

string

URL of the region where the Subnetwork resides. This field can be set only at resource creation time.
privateIpGoogleAccess

boolean

Whether the VMs in this subnet can access Google services without assigned external IP addresses. This field can be both set at resource creation time and updated using setPrivateIpGoogleAccess.
secondaryIpRanges[]

object

An array of configurations for secondary IP ranges for VM instances contained in this subnetwork. The primary IP of such VM must belong to the primary ipCidrRange of the subnetwork. The alias IPs may belong to either primary or secondary ranges. This field can be updated with a patch request.
secondaryIpRanges[].rangeName

string

The name associated with this subnetwork secondary range, used when adding an alias IP range to a VM instance. The name must be 1-63 characters long, and comply with RFC1035. The name must be unique within the subnetwork.
secondaryIpRanges[].ipCidrRange

string

The range of IP addresses belonging to this subnetwork secondary range. Provide this property when you create the subnetwork. Ranges must be unique and non-overlapping with all primary and secondary IP ranges within a network. Only IPv4 is supported. The range can be any range listed in the Valid ranges list.
fingerprint

string (bytes format)

Fingerprint of this resource. A hash of the contents stored in this object. This field is used in optimistic locking. This field will be ignored when inserting a Subnetwork. An up-to-date fingerprint must be provided in order to update the Subnetwork, otherwise the request will fail with error 412 conditionNotMet.

To see the latest fingerprint, make a get() request to retrieve a Subnetwork.

A base64-encoded string.
enableFlowLogs

boolean

Whether to enable flow logging for this subnetwork. If this field is not explicitly set, it will not appear in get listings. If not set the default behavior is to disable flow logging. This field isn't supported with the purpose field set to INTERNAL_HTTPS_LOAD_BALANCER.
privateIpv6GoogleAccess

enum

The private IPv6 google access type for the VMs in this subnet. This is an expanded field of enablePrivateV6Access. If both fields are set, privateIpv6GoogleAccess will take priority.

This field can be both set at resource creation time and updated using patch.
ipv6CidrRange

string

[Output Only] The range of internal IPv6 addresses that are owned by this subnetwork.
externalIpv6Prefix

string

[Output Only] The range of external IPv6 addresses that are owned by this subnetwork.
purpose

enum

The purpose of the resource. This field can be either PRIVATE_RFC_1918 or INTERNAL_HTTPS_LOAD_BALANCER. A subnetwork with purpose set to INTERNAL_HTTPS_LOAD_BALANCER is a user-created subnetwork that is reserved for Internal HTTP(S) Load Balancing. If unspecified, the purpose defaults to PRIVATE_RFC_1918. The enableFlowLogs field isn't supported with the purpose field set to INTERNAL_HTTPS_LOAD_BALANCER.
role

enum

The role of subnetwork. Currently, this field is only used when purpose = INTERNAL_HTTPS_LOAD_BALANCER. The value can be set to ACTIVE or BACKUP. An ACTIVE subnetwork is one that is currently being used for Internal HTTP(S) Load Balancing. A BACKUP subnetwork is one that is ready to be promoted to ACTIVE or is currently draining. This field can be updated with a patch request.
state

enum

[Output Only] The state of the subnetwork, which can be one of the following values: READY: Subnetwork is created and ready to use DRAINING: only applicable to subnetworks that have the purpose set to INTERNAL_HTTPS_LOAD_BALANCER and indicates that connections to the load balancer are being drained. A subnetwork that is draining cannot be used or modified until it reaches a status of READY
logConfig

object

This field denotes the VPC flow logging options for this subnetwork. If logging is enabled, logs are exported to Cloud Logging.
logConfig.enable

boolean

Whether to enable flow logging for this subnetwork. If this field is not explicitly set, it will not appear in get listings. If not set the default behavior is to disable flow logging.
logConfig.aggregationInterval

enum

Can only be specified if VPC flow logging for this subnetwork is enabled. Toggles the aggregation interval for collecting flow logs. Increasing the interval time will reduce the amount of generated flow logs for long lasting connections. Default is an interval of 5 seconds per connection.
logConfig.flowSampling

number

Can only be specified if VPC flow logging for this subnetwork is enabled. The value of the field must be in [0, 1]. Set the sampling rate of VPC flow logs within the subnetwork where 1.0 means all collected logs are reported and 0.0 means no logs are reported. Default is 0.5, which means half of all collected logs are reported.
logConfig.metadata

enum

Can only be specified if VPC flow logs for this subnetwork is enabled. Configures whether all, none or a subset of metadata fields should be added to the reported VPC flow logs. Default is EXCLUDE_ALL_METADATA.
logConfig.metadataFields[]

string

Can only be specified if VPC flow logs for this subnetwork is enabled and "metadata" was set to CUSTOM_METADATA.
logConfig.filterExpr

string

Can only be specified if VPC flow logs for this subnetwork is enabled. zoneInstantSnapshots.export filter used to define which VPC flow logs should be logged.
stackType

enum

The stack type for this subnet to identify whether the IPv6 feature is enabled or not. If not specified IPV4_ONLY will be used.

This field can be both set at resource creation time and updated using patch.
ipv6AccessType

enum

The access type of IPv6 address this subnet holds. It's immutable and can only be specified during creation or the first time the subnet is updated into IPV4_IPV6 dual stack. If the ipv6_type is EXTERNAL then this subnet cannot enable direct path.
kind

string

[Output Only] Type of the resource. Always compute#subnetwork for Subnetwork resources.

Methods

aggregatedList

 Retrieves an aggregated list of subnetworks.

delete

 Deletes the specified subnetwork.

expandIpCidrRange

 Expands the IP CIDR range of the subnetwork to a specified value.

get

 Returns the specified subnetwork.

getIamPolicy

 Gets the access control policy for a resource.

insert

 Creates a subnetwork in the specified project using the data included in the request.

list

 Retrieves a list of subnetworks available to the specified project.

listUsable

 Retrieves an aggregated list of all usable subnetworks in the project.

patch

 Patches the specified subnetwork with the data included in the request.

setIamPolicy

 Sets the access control policy on the specified resource.

setPrivateIpGoogleAccess

 Set whether VMs in this subnet can access Google services without assigning external IP addresses through Private Google Access.

testIamPermissions

 Returns permissions that a caller has on the specified resource.