const (
    AWSRegion           = "aws_region"
    AWSAvailabilityZone = "aws_availability_zone"
    AWSInstanceID       = "aws_instance_id"
    AWSAccountID        = "aws_account_id"
)

const (
    AzureMetadataEndpoint  = "http://169.254.169.254"
    AzureInstanceURL       = AzureMetadataEndpoint + "/metadata/instance"
    AzureDefaultAPIVersion = "2019-08-15"
    SysVendorPath          = "/sys/class/dmi/id/sys_vendor"
    MicrosoftIdentifier    = "Microsoft Corporation"

    AzureName     = "azure_name"
    AzureLocation = "azure_location"
    AzureVMID     = "azure_vm_id"
)

const (
    GCPProject           = "gcp_project"
    GCPProjectNumber     = "gcp_project_number"
    GCPCluster           = "gcp_gke_cluster_name"
    GCPLocation          = "gcp_location"
    GCEInstance          = "gcp_gce_instance"
    GCEInstanceID        = "gcp_gce_instance_id"
    GCEInstanceTemplate  = "gcp_gce_instance_template"
    GCEInstanceCreatedBy = "gcp_gce_instance_created_by"
)

const (
    KubernetesServiceHost = "KUBERNETES_SERVICE_HOST"
)

const Platforms = 3

type Environment interface {
    // Metadata returns a collection of environmental metadata, structured
    // as a map for metadata names to values. An example for GCP would be a
    // mapping from "gcp_project" to "2344534543". Keys should be prefixed
    // by the short name for the platform (example: "gcp_").
    Metadata() map[string]string

    // Locality returns the run location for the bootstrap transformed from the
    // platform-specific representation into the Envoy Locality schema.
    Locality() *core.Locality

    // Labels returns a collection of labels that exist on the underlying
    // instance, structured as a map for label name to values.
    Labels() map[string]string

    // IsKubernetes determines if running on Kubernetes
    IsKubernetes() bool
}

type Unknown struct{}