Golang names.SubnetTag类代码示例

// OpenedPorts returns a map of network.PortRange to unit tag for all opened
// port ranges on the machine for the subnet matching given subnetTag.
func (m *Machine) OpenedPorts(subnetTag names.SubnetTag) (map[network.PortRange]names.UnitTag, error) {
	var results params.MachinePortsResults
	var subnetTagAsString string
	if subnetTag.Id() != "" {
		subnetTagAsString = subnetTag.String()
	}
	args := params.MachinePortsParams{
		Params: []params.MachinePorts{
			{MachineTag: m.tag.String(), SubnetTag: subnetTagAsString},
		},
	}
	err := m.st.facade.FacadeCall("GetMachinePorts", args, &results)
	if err != nil {
		return nil, err
	}
	if len(results.Results) != 1 {
		return nil, fmt.Errorf("expected 1 result, got %d", len(results.Results))
	}
	result := results.Results[0]
	if result.Error != nil {
		return nil, result.Error
	}
	// Convert string tags to names.UnitTag before returning.
	endResult := make(map[network.PortRange]names.UnitTag)
	for _, ports := range result.Ports {
		unitTag, err := names.ParseUnitTag(ports.UnitTag)
		if err != nil {
			return nil, err
		}
		endResult[ports.PortRange.NetworkPortRange()] = unitTag
	}
	return endResult, nil
}

// CreateSubnet creates a new subnet with the provider.
func (api *API) CreateSubnet(subnet names.SubnetTag, space names.SpaceTag, zones []string, isPublic bool) error {
	var response params.ErrorResults
	params := params.CreateSubnetsParams{
		Subnets: []params.CreateSubnetParams{{
			SubnetTag: subnet.String(),
			SpaceTag:  space.String(),
			Zones:     zones,
			IsPublic:  isPublic,
		}},
	}
	err := api.facade.FacadeCall("CreateSubnets", params, &response)
	if err != nil {
		return errors.Trace(err)
	}
	return response.OneError()
}

// AddSubnet adds an existing subnet to the environment.
func (api *API) AddSubnet(subnet names.SubnetTag, providerId network.Id, space names.SpaceTag, zones []string) error {
	var response params.ErrorResults
	// Prefer ProviderId when set over CIDR.
	subnetTag := subnet.String()
	if providerId != "" {
		subnetTag = ""
	}

	params := params.AddSubnetsParams{
		Subnets: []params.AddSubnetParams{{
			SubnetTag:        subnetTag,
			SubnetProviderId: string(providerId),
			SpaceTag:         space.String(),
			Zones:            zones,
		}},
	}
	err := api.facade.FacadeCall("AddSubnets", params, &response)
	if err != nil {
		return errors.Trace(err)
	}
	return response.OneError()
}

// validateSubnet ensures either subnetTag or providerId is valid (not both),
// then uses the cache to validate and lookup the provider SubnetInfo for the
// subnet, if found.
func (cache *addSubnetsCache) validateSubnet(subnetTag, providerId string) (*network.SubnetInfo, error) {
	haveTag := subnetTag != ""
	haveProviderId := providerId != ""

	if !haveTag && !haveProviderId {
		return nil, errors.Errorf("either SubnetTag or SubnetProviderId is required")
	} else if haveTag && haveProviderId {
		return nil, errors.Errorf("SubnetTag and SubnetProviderId cannot be both set")
	}
	var tag names.SubnetTag
	if haveTag {
		var err error
		tag, err = names.ParseSubnetTag(subnetTag)
		if err != nil {
			return nil, errors.Annotate(err, "given SubnetTag is invalid")
		}
	}

	// Otherwise we need the cache to validate.
	if err := cache.cacheSubnets(); err != nil {
		return nil, errors.Trace(err)
	}

	if haveTag {
		providerIds, ok := cache.providerIdsByCIDR[tag.Id()]
		if !ok || providerIds.IsEmpty() {
			return nil, errors.NotFoundf("subnet with CIDR %q", tag.Id())
		}
		if providerIds.Size() > 1 {
			ids := `"` + strings.Join(providerIds.SortedValues(), `", "`) + `"`
			return nil, errors.Errorf(
				"multiple subnets with CIDR %q: retry using ProviderId from: %s",
				tag.Id(), ids,
			)
		}
		// A single CIDR matched.
		providerId = providerIds.Values()[0]
	}

	info, ok := cache.subnetsByProviderId[providerId]
	if !ok || info == nil {
		return nil, errors.NotFoundf(
			"subnet with CIDR %q and ProviderId %q",
			tag.Id(), providerId,
		)
	}
	// Do last-call validation.
	if !names.IsValidSubnet(info.CIDR) {
		_, ipnet, err := net.ParseCIDR(info.CIDR)
		if err != nil && info.CIDR != "" {
			// The underlying error is not important here, just that
			// the CIDR is invalid.
			return nil, errors.Errorf(
				"subnet with CIDR %q and ProviderId %q: invalid CIDR",
				info.CIDR, providerId,
			)
		}
		if info.CIDR == "" {
			return nil, errors.Errorf(
				"subnet with ProviderId %q: empty CIDR", providerId,
			)
		}
		return nil, errors.Errorf(
			"subnet with ProviderId %q: incorrect CIDR format %q, expected %q",
			providerId, info.CIDR, ipnet.String(),
		)
	}
	return info, nil
}