60 lines
2.3 KiB
Go
60 lines
2.3 KiB
Go
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package googlecompute
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import (
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"fmt"
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"strings"
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)
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// This method will build a network and subnetwork ID from the provided
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// instance config, and return them in that order.
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func getNetworking(c *InstanceConfig) (string, string, error) {
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networkId := c.Network
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subnetworkId := c.Subnetwork
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// Apply network naming requirements per
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// https://cloud.google.com/compute/docs/reference/latest/instances#resource
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switch c.Network {
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// It is possible to omit the network property as long as a subnet is
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// specified. That will be validated later.
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case "":
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break
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// This special short name should be expanded.
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case "default":
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networkId = "global/networks/default"
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// A value other than "default" was provided for the network name.
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default:
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// If the value doesn't contain a slash, we assume it's not a full or
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// partial URL. We will expand it into a partial URL here and avoid
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// making an API call to discover the network as it's common for the
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// caller to not have permission against network discovery APIs.
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if !strings.Contains(c.Network, "/") {
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networkId = "projects/" + c.NetworkProjectId + "/global/networks/" + c.Network
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}
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}
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// Apply subnetwork naming requirements per
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// https://cloud.google.com/compute/docs/reference/latest/instances#resource
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switch c.Subnetwork {
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case "":
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// You can't omit both subnetwork and network
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if networkId == "" {
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return networkId, subnetworkId, fmt.Errorf("both network and subnetwork were empty.")
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}
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// An empty subnetwork is only valid for networks in legacy mode or
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// auto-subnet mode. We could make an API call to get that information
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// about the network, but it's common for the caller to not have
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// permission to that API. We'll proceed assuming they're correct in
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// omitting the subnetwork and let the compute.insert API surface an
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// error about an invalid network configuration if it exists.
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break
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default:
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// If the value doesn't contain a slash, we assume it's not a full or
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// partial URL. We will expand it into a partial URL here and avoid
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// making a call to discover the subnetwork.
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if !strings.Contains(c.Subnetwork, "/") {
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subnetworkId = "projects/" + c.NetworkProjectId + "/regions/" + c.Region + "/subnetworks/" + c.Subnetwork
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}
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}
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return networkId, subnetworkId, nil
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}
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