Version: v0.9.0 Latest Latest

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Published: Mar 19, 2016 License: Apache-2.0, Apache-2.0 Imports: 4 Imported by: 0



Package subnets contains functionality for working with Neutron subnet resources. A subnet represents an IP address block that can be used to assign IP addresses to virtual instances. Each subnet must have a CIDR and must be associated with a network. IPs can either be selected from the whole subnet CIDR or from allocation pools specified by the user.

A subnet can also have a gateway, a list of DNS name servers, and host routes. This information is pushed to instances whose interfaces are associated with the subnet.



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const (
	IPv4 = 4
	IPv6 = 6

Valid IP types


This section is empty.


func IDFromName

func IDFromName(client *gophercloud.ServiceClient, name string) (string, error)

IDFromName is a convenience function that returns a subnet's ID given its name.

func List

List returns a Pager which allows you to iterate over a collection of subnets. It accepts a ListOpts struct, which allows you to filter and sort the returned collection for greater efficiency.

Default policy settings return only those subnets that are owned by the tenant who submits the request, unless the request is submitted by a user with administrative rights.


type AdminState

type AdminState *bool

AdminState gives users a solid type to work with for create and update operations. It is recommended that users use the `Up` and `Down` enums.

var (
	Up   AdminState = &iTrue
	Down AdminState = &iFalse

Convenience vars for AdminStateUp values.

type AllocationPool

type AllocationPool struct {
	Start string `json:"start"`
	End   string `json:"end"`

AllocationPool represents a sub-range of cidr available for dynamic allocation to ports, e.g. {Start: "", End: ""}

type CreateOpts

type CreateOpts struct {
	// Required
	NetworkID string
	CIDR      string
	// Optional
	Name            string
	TenantID        string
	AllocationPools []AllocationPool
	GatewayIP       string
	IPVersion       int
	EnableDHCP      *bool
	DNSNameservers  []string
	HostRoutes      []HostRoute

CreateOpts represents the attributes used when creating a new subnet.

func (CreateOpts) ToSubnetCreateMap

func (opts CreateOpts) ToSubnetCreateMap() (map[string]interface{}, error)

ToSubnetCreateMap casts a CreateOpts struct to a map.

type CreateOptsBuilder

type CreateOptsBuilder interface {
	ToSubnetCreateMap() (map[string]interface{}, error)

CreateOptsBuilder is the interface options structs have to satisfy in order to be used in the main Create operation in this package. Since many extensions decorate or modify the common logic, it is useful for them to satisfy a basic interface in order for them to be used.

type CreateResult

type CreateResult struct {
	// contains filtered or unexported fields

CreateResult represents the result of a create operation.

func Create

Create accepts a CreateOpts struct and creates a new subnet using the values provided. You must remember to provide a valid NetworkID, CIDR and IP version.

func (CreateResult) Extract

func (r CreateResult) Extract() (*Subnet, error)

Extract is a function that accepts a result and extracts a subnet resource.

type DeleteResult

type DeleteResult struct {

DeleteResult represents the result of a delete operation.

func Delete

Delete accepts a unique ID and deletes the subnet associated with it.

type GetResult

type GetResult struct {
	// contains filtered or unexported fields

GetResult represents the result of a get operation.

func Get

Get retrieves a specific subnet based on its unique ID.

func (GetResult) Extract

func (r GetResult) Extract() (*Subnet, error)

Extract is a function that accepts a result and extracts a subnet resource.

type HostRoute

type HostRoute struct {
	DestinationCIDR string `mapstructure:"destination" json:"destination"`
	NextHop         string `mapstructure:"nexthop" json:"nexthop"`

HostRoute represents a route that should be used by devices with IPs from a subnet (not including local subnet route).

type ListOpts

type ListOpts struct {
	Name       string `q:"name"`
	EnableDHCP *bool  `q:"enable_dhcp"`
	NetworkID  string `q:"network_id"`
	TenantID   string `q:"tenant_id"`
	IPVersion  int    `q:"ip_version"`
	GatewayIP  string `q:"gateway_ip"`
	CIDR       string `q:"cidr"`
	ID         string `q:"id"`
	Limit      int    `q:"limit"`
	Marker     string `q:"marker"`
	SortKey    string `q:"sort_key"`
	SortDir    string `q:"sort_dir"`

ListOpts allows the filtering and sorting of paginated collections through the API. Filtering is achieved by passing in struct field values that map to the subnet attributes you want to see returned. SortKey allows you to sort by a particular subnet attribute. SortDir sets the direction, and is either `asc' or `desc'. Marker and Limit are used for pagination.

func (ListOpts) ToSubnetListQuery

func (opts ListOpts) ToSubnetListQuery() (string, error)

ToSubnetListQuery formats a ListOpts into a query string.

type ListOptsBuilder

type ListOptsBuilder interface {
	ToSubnetListQuery() (string, error)

ListOptsBuilder allows extensions to add additional parameters to the List request.

type Subnet

type Subnet struct {
	// UUID representing the subnet
	ID string `mapstructure:"id" json:"id"`
	// UUID of the parent network
	NetworkID string `mapstructure:"network_id" json:"network_id"`
	// Human-readable name for the subnet. Might not be unique.
	Name string `mapstructure:"name" json:"name"`
	// IP version, either `4' or `6'
	IPVersion int `mapstructure:"ip_version" json:"ip_version"`
	// CIDR representing IP range for this subnet, based on IP version
	CIDR string `mapstructure:"cidr" json:"cidr"`
	// Default gateway used by devices in this subnet
	GatewayIP string `mapstructure:"gateway_ip" json:"gateway_ip"`
	// DNS name servers used by hosts in this subnet.
	DNSNameservers []string `mapstructure:"dns_nameservers" json:"dns_nameservers"`
	// Sub-ranges of CIDR available for dynamic allocation to ports. See AllocationPool.
	AllocationPools []AllocationPool `mapstructure:"allocation_pools" json:"allocation_pools"`
	// Routes that should be used by devices with IPs from this subnet (not including local subnet route).
	HostRoutes []HostRoute `mapstructure:"host_routes" json:"host_routes"`
	// Specifies whether DHCP is enabled for this subnet or not.
	EnableDHCP bool `mapstructure:"enable_dhcp" json:"enable_dhcp"`
	// Owner of network. Only admin users can specify a tenant_id other than its own.
	TenantID string `mapstructure:"tenant_id" json:"tenant_id"`

Subnet represents a subnet. See package documentation for a top-level description of what this is.

func ExtractSubnets

func ExtractSubnets(page pagination.Page) ([]Subnet, error)

ExtractSubnets accepts a Page struct, specifically a SubnetPage struct, and extracts the elements into a slice of Subnet structs. In other words, a generic collection is mapped into a relevant slice.

type SubnetPage

type SubnetPage struct {

SubnetPage is the page returned by a pager when traversing over a collection of subnets.

func (SubnetPage) IsEmpty

func (p SubnetPage) IsEmpty() (bool, error)

IsEmpty checks whether a SubnetPage struct is empty.

func (SubnetPage) NextPageURL

func (p SubnetPage) NextPageURL() (string, error)

NextPageURL is invoked when a paginated collection of subnets has reached the end of a page and the pager seeks to traverse over a new one. In order to do this, it needs to construct the next page's URL.

type UpdateOpts

type UpdateOpts struct {
	Name           string
	GatewayIP      string
	DNSNameservers []string
	HostRoutes     []HostRoute
	EnableDHCP     *bool

UpdateOpts represents the attributes used when updating an existing subnet.

func (UpdateOpts) ToSubnetUpdateMap

func (opts UpdateOpts) ToSubnetUpdateMap() (map[string]interface{}, error)

ToSubnetUpdateMap casts an UpdateOpts struct to a map.

type UpdateOptsBuilder

type UpdateOptsBuilder interface {
	ToSubnetUpdateMap() (map[string]interface{}, error)

UpdateOptsBuilder allows extensions to add additional parameters to the Update request.

type UpdateResult

type UpdateResult struct {
	// contains filtered or unexported fields

UpdateResult represents the result of an update operation.

func Update

Update accepts a UpdateOpts struct and updates an existing subnet using the values provided.

func (UpdateResult) Extract

func (r UpdateResult) Extract() (*Subnet, error)

Extract is a function that accepts a result and extracts a subnet resource.

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