cost-model/pkg/cloud/awsprovider.go

package cloud

import (
	"bytes"
	"compress/gzip"
	"encoding/csv"
	"encoding/json"
	"fmt"
	"io"
	"io/ioutil"
	"log"
	"net/http"
	"os"
	"regexp"
	"strconv"
	"strings"
	"sync"
	"time"

	"k8s.io/klog"

	"github.com/kubecost/cost-model/pkg/clustercache"
	"github.com/kubecost/cost-model/pkg/errors"
	"github.com/kubecost/cost-model/pkg/util"

	"github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/aws/awserr"
	"github.com/aws/aws-sdk-go/aws/credentials"
	"github.com/aws/aws-sdk-go/aws/credentials/stscreds"
	"github.com/aws/aws-sdk-go/aws/session"
	"github.com/aws/aws-sdk-go/service/athena"
	"github.com/aws/aws-sdk-go/service/ec2"
	"github.com/aws/aws-sdk-go/service/s3"
	"github.com/aws/aws-sdk-go/service/s3/s3manager"
	"github.com/jszwec/csvutil"

	v1 "k8s.io/api/core/v1"
)

const awsAccessKeyIDEnvVar = "AWS_ACCESS_KEY_ID"
const awsAccessKeySecretEnvVar = "AWS_SECRET_ACCESS_KEY"
const awsReservedInstancePricePerHour = 0.0287
const supportedSpotFeedVersion = "1"
const SpotInfoUpdateType = "spotinfo"
const AthenaInfoUpdateType = "athenainfo"

// How often spot data is refreshed
const SpotRefreshDuration = 15 * time.Minute

const defaultConfigPath = "/var/configs/"

var awsRegions = []string{
	"us-east-2",
	"us-east-1",
	"us-west-1",
	"us-west-2",
	"ap-east-1",
	"ap-south-1",
	"ap-northeast-3",
	"ap-northeast-2",
	"ap-southeast-1",
	"ap-southeast-2",
	"ap-northeast-1",
	"ca-central-1",
	"cn-north-1",
	"cn-northwest-1",
	"eu-central-1",
	"eu-west-1",
	"eu-west-2",
	"eu-west-3",
	"eu-north-1",
	"me-south-1",
	"sa-east-1",
	"us-gov-east-1",
	"us-gov-west-1",
}

// AWS represents an Amazon Provider
type AWS struct {
	Pricing                 map[string]*AWSProductTerms
	SpotPricingByInstanceID map[string]*spotInfo
	SpotPricingUpdatedAt    *time.Time
	SpotRefreshRunning      bool
	SpotPricingLock         sync.RWMutex
	RIPricingByInstanceID   map[string]*RIData
	RIDataRunning           bool
	RIDataLock              sync.RWMutex
	ValidPricingKeys        map[string]bool
	Clientset               clustercache.ClusterCache
	BaseCPUPrice            string
	BaseRAMPrice            string
	BaseGPUPrice            string
	BaseSpotCPUPrice        string
	BaseSpotRAMPrice        string
	SpotLabelName           string
	SpotLabelValue          string
	ServiceKeyName          string
	ServiceKeySecret        string
	SpotDataRegion          string
	SpotDataBucket          string
	SpotDataPrefix          string
	ProjectID               string
	DownloadPricingDataLock sync.RWMutex
	Config                  *ProviderConfig
	*CustomProvider
}

type AWSAccessKey struct {
	AccessKeyID     string `json:"aws_access_key_id"`
	SecretAccessKey string `json:"aws_secret_access_key"`
}

// AWSPricing maps a k8s node to an AWS Pricing "product"
type AWSPricing struct {
	Products map[string]*AWSProduct `json:"products"`
	Terms    AWSPricingTerms        `json:"terms"`
}

// AWSProduct represents a purchased SKU
type AWSProduct struct {
	Sku        string               `json:"sku"`
	Attributes AWSProductAttributes `json:"attributes"`
}

// AWSProductAttributes represents metadata about the product used to map to a node.
type AWSProductAttributes struct {
	Location        string `json:"location"`
	InstanceType    string `json:"instanceType"`
	Memory          string `json:"memory"`
	Storage         string `json:"storage"`
	VCpu            string `json:"vcpu"`
	UsageType       string `json:"usagetype"`
	OperatingSystem string `json:"operatingSystem"`
	PreInstalledSw  string `json:"preInstalledSw"`
	InstanceFamily  string `json:"instanceFamily"`
	GPU             string `json:"gpu"` // GPU represents the number of GPU on the instance
}

// AWSPricingTerms are how you pay for the node: OnDemand, Reserved, or (TODO) Spot
type AWSPricingTerms struct {
	OnDemand map[string]map[string]*AWSOfferTerm `json:"OnDemand"`
	Reserved map[string]map[string]*AWSOfferTerm `json:"Reserved"`
}

// AWSOfferTerm is a sku extension used to pay for the node.
type AWSOfferTerm struct {
	Sku             string                  `json:"sku"`
	PriceDimensions map[string]*AWSRateCode `json:"priceDimensions"`
}

// AWSRateCode encodes data about the price of a product
type AWSRateCode struct {
	Unit         string          `json:"unit"`
	PricePerUnit AWSCurrencyCode `json:"pricePerUnit"`
}

// AWSCurrencyCode is the localized currency. (TODO: support non-USD)
type AWSCurrencyCode struct {
	USD string `json:"USD"`
}

// AWSProductTerms represents the full terms of the product
type AWSProductTerms struct {
	Sku      string        `json:"sku"`
	OnDemand *AWSOfferTerm `json:"OnDemand"`
	Reserved *AWSOfferTerm `json:"Reserved"`
	Memory   string        `json:"memory"`
	Storage  string        `json:"storage"`
	VCpu     string        `json:"vcpu"`
	GPU      string        `json:"gpu"` // GPU represents the number of GPU on the instance
	PV       *PV           `json:"pv"`
}

// ClusterIdEnvVar is the environment variable in which one can manually set the ClusterId
const ClusterIdEnvVar = "AWS_CLUSTER_ID"

// OnDemandRateCode is appended to an node sku
const OnDemandRateCode = ".JRTCKXETXF"

// ReservedRateCode is appended to a node sku
const ReservedRateCode = ".38NPMPTW36"

// HourlyRateCode is appended to a node sku
const HourlyRateCode = ".6YS6EN2CT7"

// volTypes are used to map between AWS UsageTypes and
// EBS volume types, as they would appear in K8s storage class
// name and the EC2 API.
var volTypes = map[string]string{
	"EBS:VolumeUsage.gp2":    "gp2",
	"EBS:VolumeUsage":        "standard",
	"EBS:VolumeUsage.sc1":    "sc1",
	"EBS:VolumeP-IOPS.piops": "io1",
	"EBS:VolumeUsage.st1":    "st1",
	"EBS:VolumeUsage.piops":  "io1",
	"gp2":                    "EBS:VolumeUsage.gp2",
	"standard":               "EBS:VolumeUsage",
	"sc1":                    "EBS:VolumeUsage.sc1",
	"io1":                    "EBS:VolumeUsage.piops",
	"st1":                    "EBS:VolumeUsage.st1",
}

// locationToRegion maps AWS region names (As they come from Billing)
// to actual region identifiers
var locationToRegion = map[string]string{
	"US East (Ohio)":             "us-east-2",
	"US East (N. Virginia)":      "us-east-1",
	"US West (N. California)":    "us-west-1",
	"US West (Oregon)":           "us-west-2",
	"Asia Pacific (Hong Kong)":   "ap-east-1",
	"Asia Pacific (Mumbai)":      "ap-south-1",
	"Asia Pacific (Osaka-Local)": "ap-northeast-3",
	"Asia Pacific (Seoul)":       "ap-northeast-2",
	"Asia Pacific (Singapore)":   "ap-southeast-1",
	"Asia Pacific (Sydney)":      "ap-southeast-2",
	"Asia Pacific (Tokyo)":       "ap-northeast-1",
	"Canada (Central)":           "ca-central-1",
	"China (Beijing)":            "cn-north-1",
	"China (Ningxia)":            "cn-northwest-1",
	"EU (Frankfurt)":             "eu-central-1",
	"EU (Ireland)":               "eu-west-1",
	"EU (London)":                "eu-west-2",
	"EU (Paris)":                 "eu-west-3",
	"EU (Stockholm)":             "eu-north-1",
	"South America (Sao Paulo)":  "sa-east-1",
	"AWS GovCloud (US-East)":     "us-gov-east-1",
	"AWS GovCloud (US)":          "us-gov-west-1",
}

var regionToBillingRegionCode = map[string]string{
	"us-east-2":      "USE2",
	"us-east-1":      "",
	"us-west-1":      "USW1",
	"us-west-2":      "USW2",
	"ap-east-1":      "APE1",
	"ap-south-1":     "APS3",
	"ap-northeast-3": "APN3",
	"ap-northeast-2": "APN2",
	"ap-southeast-1": "APS1",
	"ap-southeast-2": "APS2",
	"ap-northeast-1": "APN1",
	"ca-central-1":   "CAN1",
	"cn-north-1":     "",
	"cn-northwest-1": "",
	"eu-central-1":   "EUC1",
	"eu-west-1":      "EU",
	"eu-west-2":      "EUW2",
	"eu-west-3":      "EUW3",
	"eu-north-1":     "EUN1",
	"sa-east-1":      "SAE1",
	"us-gov-east-1":  "UGE1",
	"us-gov-west-1":  "UGW1",
}

var loadedAWSSecret bool = false
var awsSecret *AWSAccessKey = nil

func (aws *AWS) GetLocalStorageQuery(window, offset string, rate bool, used bool) string {
	return ""
}

// KubeAttrConversion maps the k8s labels for region to an aws region
func (aws *AWS) KubeAttrConversion(location, instanceType, operatingSystem string) string {
	operatingSystem = strings.ToLower(operatingSystem)

	region := locationToRegion[location]
	return region + "," + instanceType + "," + operatingSystem
}

type AwsSpotFeedInfo struct {
	BucketName       string `json:"bucketName"`
	Prefix           string `json:"prefix"`
	Region           string `json:"region"`
	AccountID        string `json:"projectID"`
	ServiceKeyName   string `json:"serviceKeyName"`
	ServiceKeySecret string `json:"serviceKeySecret"`
	SpotLabel        string `json:"spotLabel"`
	SpotLabelValue   string `json:"spotLabelValue"`
}

type AwsAthenaInfo struct {
	AthenaBucketName string `json:"athenaBucketName"`
	AthenaRegion     string `json:"athenaRegion"`
	AthenaDatabase   string `json:"athenaDatabase"`
	AthenaTable      string `json:"athenaTable"`
	ServiceKeyName   string `json:"serviceKeyName"`
	ServiceKeySecret string `json:"serviceKeySecret"`
	AccountID        string `json:"projectID"`
	MasterPayerARN   string `json:"masterPayerARN"`
}

func (aws *AWS) GetManagementPlatform() (string, error) {
	nodes := aws.Clientset.GetAllNodes()

	if len(nodes) > 0 {
		n := nodes[0]
		version := n.Status.NodeInfo.KubeletVersion
		if strings.Contains(version, "eks") {
			return "eks", nil
		}
		if _, ok := n.Labels["kops.k8s.io/instancegroup"]; ok {
			return "kops", nil
		}
	}
	return "", nil
}

func (aws *AWS) GetConfig() (*CustomPricing, error) {
	c, err := aws.Config.GetCustomPricingData()
	if c.Discount == "" {
		c.Discount = "0%"
	}
	if c.NegotiatedDiscount == "" {
		c.NegotiatedDiscount = "0%"
	}
	if err != nil {
		return nil, err
	}

	return c, nil
}
func (aws *AWS) UpdateConfigFromConfigMap(a map[string]string) (*CustomPricing, error) {
	return aws.Config.UpdateFromMap(a)
}

func (aws *AWS) UpdateConfig(r io.Reader, updateType string) (*CustomPricing, error) {
	return aws.Config.Update(func(c *CustomPricing) error {
		if updateType == SpotInfoUpdateType {
			a := AwsSpotFeedInfo{}
			err := json.NewDecoder(r).Decode(&a)
			if err != nil {
				return err
			}

			c.ServiceKeyName = a.ServiceKeyName
			if a.ServiceKeySecret != "" {
				c.ServiceKeySecret = a.ServiceKeySecret
			}
			c.SpotDataPrefix = a.Prefix
			c.SpotDataBucket = a.BucketName
			c.ProjectID = a.AccountID
			c.SpotDataRegion = a.Region
			c.SpotLabel = a.SpotLabel
			c.SpotLabelValue = a.SpotLabelValue

		} else if updateType == AthenaInfoUpdateType {
			a := AwsAthenaInfo{}
			err := json.NewDecoder(r).Decode(&a)
			if err != nil {
				return err
			}
			c.AthenaBucketName = a.AthenaBucketName
			c.AthenaRegion = a.AthenaRegion
			c.AthenaDatabase = a.AthenaDatabase
			c.AthenaTable = a.AthenaTable
			c.ServiceKeyName = a.ServiceKeyName
			if a.ServiceKeySecret != "" {
				c.ServiceKeySecret = a.ServiceKeySecret
			}
			if a.MasterPayerARN != "" {
				c.MasterPayerARN = a.MasterPayerARN
			}
			c.AthenaProjectID = a.AccountID
		} else {
			a := make(map[string]interface{})
			err := json.NewDecoder(r).Decode(&a)
			if err != nil {
				return err
			}
			for k, v := range a {
				kUpper := strings.Title(k) // Just so we consistently supply / receive the same values, uppercase the first letter.
				vstr, ok := v.(string)
				if ok {
					err := SetCustomPricingField(c, kUpper, vstr)
					if err != nil {
						return err
					}
				} else {
					sci := v.(map[string]interface{})
					sc := make(map[string]string)
					for k, val := range sci {
						sc[k] = val.(string)
					}
					c.SharedCosts = sc //todo: support reflection/multiple map fields
				}
			}
		}

		remoteEnabled := os.Getenv(remoteEnabled)
		if remoteEnabled == "true" {
			err := UpdateClusterMeta(os.Getenv(clusterIDKey), c.ClusterName)
			if err != nil {
				return err
			}
		}

		return nil
	})
}

type awsKey struct {
	SpotLabelName  string
	SpotLabelValue string
	Labels         map[string]string
	ProviderID     string
}

func (k *awsKey) GPUType() string {
	return ""
}

func (k *awsKey) ID() string {
	provIdRx := regexp.MustCompile("aws:///([^/]+)/([^/]+)") // It's of the form aws:///us-east-2a/i-0fea4fd46592d050b and we want i-0fea4fd46592d050b, if it exists
	for matchNum, group := range provIdRx.FindStringSubmatch(k.ProviderID) {
		if matchNum == 2 {
			return group
		}
	}
	klog.V(3).Infof("Could not find instance ID in \"%s\"", k.ProviderID)
	return ""
}

func (k *awsKey) Features() string {

	instanceType := k.Labels[v1.LabelInstanceType]
	var operatingSystem string
	operatingSystem, ok := k.Labels[v1.LabelOSStable]
	if !ok {
		operatingSystem = k.Labels["beta.kubernetes.io/os"]
	}
	region := k.Labels[v1.LabelZoneRegion]

	key := region + "," + instanceType + "," + operatingSystem
	usageType := "preemptible"
	spotKey := key + "," + usageType
	if l, ok := k.Labels["lifecycle"]; ok && l == "EC2Spot" {
		return spotKey
	}
	if l, ok := k.Labels[k.SpotLabelName]; ok && l == k.SpotLabelValue {
		return spotKey
	}
	return key
}

func (aws *AWS) PVPricing(pvk PVKey) (*PV, error) {
	pricing, ok := aws.Pricing[pvk.Features()]
	if !ok {
		klog.V(4).Infof("Persistent Volume pricing not found for %s: %s", pvk.GetStorageClass(), pvk.Features())
		return &PV{}, nil
	}
	return pricing.PV, nil
}

type awsPVKey struct {
	Labels                 map[string]string
	StorageClassParameters map[string]string
	StorageClassName       string
	Name                   string
	DefaultRegion          string
}

func (aws *AWS) GetPVKey(pv *v1.PersistentVolume, parameters map[string]string, defaultRegion string) PVKey {
	return &awsPVKey{
		Labels:                 pv.Labels,
		StorageClassName:       pv.Spec.StorageClassName,
		StorageClassParameters: parameters,
		Name:                   pv.Name,
		DefaultRegion:          defaultRegion,
	}
}

func (key *awsPVKey) GetStorageClass() string {
	return key.StorageClassName
}

func (key *awsPVKey) Features() string {
	storageClass := key.StorageClassParameters["type"]
	if storageClass == "standard" {
		storageClass = "gp2"
	}
	// Storage class names are generally EBS volume types (gp2)
	// Keys in Pricing are based on UsageTypes (EBS:VolumeType.gp2)
	// Converts between the 2
	region := key.Labels[v1.LabelZoneRegion]
	//if region == "" {
	//	region = "us-east-1"
	//}
	class, ok := volTypes[storageClass]
	if !ok {
		klog.V(4).Infof("No voltype mapping for %s's storageClass: %s", key.Name, storageClass)
	}
	return region + "," + class
}

// GetKey maps node labels to information needed to retrieve pricing data
func (aws *AWS) GetKey(labels map[string]string, n *v1.Node) Key {
	return &awsKey{
		SpotLabelName:  aws.SpotLabelName,
		SpotLabelValue: aws.SpotLabelValue,
		Labels:         labels,
		ProviderID:     labels["providerID"],
	}
}

func (aws *AWS) isPreemptible(key string) bool {
	s := strings.Split(key, ",")
	if len(s) == 4 && s[3] == "preemptible" {
		return true
	}
	return false
}

// DownloadPricingData fetches data from the AWS Pricing API
func (aws *AWS) DownloadPricingData() error {
	aws.DownloadPricingDataLock.Lock()
	defer aws.DownloadPricingDataLock.Unlock()
	c, err := aws.Config.GetCustomPricingData()
	if err != nil {
		klog.V(1).Infof("Error downloading default pricing data: %s", err.Error())
	}
	aws.BaseCPUPrice = c.CPU
	aws.BaseRAMPrice = c.RAM
	aws.BaseGPUPrice = c.GPU
	aws.BaseSpotCPUPrice = c.SpotCPU
	aws.BaseSpotRAMPrice = c.SpotRAM
	aws.SpotLabelName = c.SpotLabel
	aws.SpotLabelValue = c.SpotLabelValue
	aws.SpotDataBucket = c.SpotDataBucket
	aws.SpotDataPrefix = c.SpotDataPrefix
	aws.ProjectID = c.ProjectID
	aws.SpotDataRegion = c.SpotDataRegion

	skn, sks := aws.getAWSAuth(false, c)
	aws.ServiceKeyName = skn
	aws.ServiceKeySecret = sks

	if len(aws.SpotDataBucket) != 0 && len(aws.ProjectID) == 0 {
		klog.V(1).Infof("using SpotDataBucket \"%s\" without ProjectID will not end well", aws.SpotDataBucket)
	}
	nodeList := aws.Clientset.GetAllNodes()

	inputkeys := make(map[string]bool)
	for _, n := range nodeList {
		labels := n.GetObjectMeta().GetLabels()
		key := aws.GetKey(labels, n)
		inputkeys[key.Features()] = true
	}

	pvList := aws.Clientset.GetAllPersistentVolumes()

	storageClasses := aws.Clientset.GetAllStorageClasses()
	storageClassMap := make(map[string]map[string]string)
	for _, storageClass := range storageClasses {
		params := storageClass.Parameters
		storageClassMap[storageClass.ObjectMeta.Name] = params
		if storageClass.GetAnnotations()["storageclass.kubernetes.io/is-default-class"] == "true" || storageClass.GetAnnotations()["storageclass.beta.kubernetes.io/is-default-class"] == "true" {
			storageClassMap["default"] = params
			storageClassMap[""] = params
		}
	}

	pvkeys := make(map[string]PVKey)
	for _, pv := range pvList {
		params, ok := storageClassMap[pv.Spec.StorageClassName]
		if !ok {
			klog.V(2).Infof("Unable to find params for storageClassName %s, falling back to default pricing", pv.Spec.StorageClassName)
			continue
		}
		key := aws.GetPVKey(pv, params, "")
		pvkeys[key.Features()] = key
	}

	// RIDataRunning establishes the existance of the goroutine. Since it's possible we
	// run multiple downloads, we don't want to create multiple go routines if one already exists
	if !aws.RIDataRunning && c.AthenaBucketName != "" {
		err = aws.GetReservationDataFromAthena() // Block until one run has completed.
		if err != nil {
			klog.V(1).Infof("Failed to lookup reserved instance data: %s", err.Error())
		} else { // If we make one successful run, check on new reservation data every hour
			go func() {
				defer errors.HandlePanic()
				aws.RIDataRunning = true

				for {
					klog.Infof("Reserved Instance watcher running... next update in 1h")
					time.Sleep(time.Hour)
					err := aws.GetReservationDataFromAthena()
					if err != nil {
						klog.Infof("Error updating RI data: %s", err.Error())
					}
				}
			}()
		}
	}

	aws.Pricing = make(map[string]*AWSProductTerms)
	aws.ValidPricingKeys = make(map[string]bool)
	skusToKeys := make(map[string]string)

	pricingURL := "https://pricing.us-east-1.amazonaws.com/offers/v1.0/aws/AmazonEC2/current/index.json"
	klog.V(2).Infof("starting download of \"%s\", which is quite large ...", pricingURL)
	resp, err := http.Get(pricingURL)
	if err != nil {
		klog.V(2).Infof("Bogus fetch of \"%s\": %v", pricingURL, err)
		return err
	}
	klog.V(2).Infof("Finished downloading \"%s\"", pricingURL)

	dec := json.NewDecoder(resp.Body)
	for {
		t, err := dec.Token()
		if err == io.EOF {
			klog.V(2).Infof("done loading \"%s\"\n", pricingURL)
			break
		}
		if t == "products" {
			_, err := dec.Token() // this should parse the opening "{""
			if err != nil {
				return err
			}
			for dec.More() {
				_, err := dec.Token() // the sku token
				if err != nil {
					return err
				}
				product := &AWSProduct{}

				err = dec.Decode(&product)
				if err != nil {
					klog.V(1).Infof("Error parsing response from \"%s\": %v", pricingURL, err.Error())
					break
				}

				if product.Attributes.PreInstalledSw == "NA" &&
					(strings.HasPrefix(product.Attributes.UsageType, "BoxUsage") || strings.Contains(product.Attributes.UsageType, "-BoxUsage")) {
					key := aws.KubeAttrConversion(product.Attributes.Location, product.Attributes.InstanceType, product.Attributes.OperatingSystem)
					spotKey := key + ",preemptible"
					if inputkeys[key] || inputkeys[spotKey] { // Just grab the sku even if spot, and change the price later.
						productTerms := &AWSProductTerms{
							Sku:     product.Sku,
							Memory:  product.Attributes.Memory,
							Storage: product.Attributes.Storage,
							VCpu:    product.Attributes.VCpu,
							GPU:     product.Attributes.GPU,
						}
						aws.Pricing[key] = productTerms
						aws.Pricing[spotKey] = productTerms
						skusToKeys[product.Sku] = key
					}
					aws.ValidPricingKeys[key] = true
					aws.ValidPricingKeys[spotKey] = true
				} else if strings.Contains(product.Attributes.UsageType, "EBS:Volume") {
					// UsageTypes may be prefixed with a region code - we're removing this when using
					// volTypes to keep lookups generic
					usageTypeRegx := regexp.MustCompile(".*(-|^)(EBS.+)")
					usageTypeMatch := usageTypeRegx.FindStringSubmatch(product.Attributes.UsageType)
					usageTypeNoRegion := usageTypeMatch[len(usageTypeMatch)-1]
					key := locationToRegion[product.Attributes.Location] + "," + usageTypeNoRegion
					spotKey := key + ",preemptible"
					pv := &PV{
						Class:  volTypes[usageTypeNoRegion],
						Region: locationToRegion[product.Attributes.Location],
					}
					productTerms := &AWSProductTerms{
						Sku: product.Sku,
						PV:  pv,
					}
					aws.Pricing[key] = productTerms
					aws.Pricing[spotKey] = productTerms
					skusToKeys[product.Sku] = key
					aws.ValidPricingKeys[key] = true
					aws.ValidPricingKeys[spotKey] = true
				}
			}
		}
		if t == "terms" {
			_, err := dec.Token() // this should parse the opening "{""
			if err != nil {
				return err
			}
			termType, err := dec.Token()
			if err != nil {
				return err
			}
			if termType == "OnDemand" {
				_, err := dec.Token()
				if err != nil { // again, should parse an opening "{"
					return err
				}
				for dec.More() {
					sku, err := dec.Token()
					if err != nil {
						return err
					}
					_, err = dec.Token() // another opening "{"
					if err != nil {
						return err
					}
					skuOnDemand, err := dec.Token()
					if err != nil {
						return err
					}
					offerTerm := &AWSOfferTerm{}
					err = dec.Decode(&offerTerm)
					if err != nil {
						klog.V(1).Infof("Error decoding AWS Offer Term: " + err.Error())
					}
					if sku.(string)+OnDemandRateCode == skuOnDemand {
						key, ok := skusToKeys[sku.(string)]
						spotKey := key + ",preemptible"
						if ok {
							aws.Pricing[key].OnDemand = offerTerm
							aws.Pricing[spotKey].OnDemand = offerTerm
							if strings.Contains(key, "EBS:VolumeP-IOPS.piops") {
								// If the specific UsageType is the per IO cost used on io1 volumes
								// we need to add the per IO cost to the io1 PV cost
								cost := offerTerm.PriceDimensions[sku.(string)+OnDemandRateCode+HourlyRateCode].PricePerUnit.USD
								// Add the per IO cost to the PV object for the io1 volume type
								aws.Pricing[key].PV.CostPerIO = cost
							} else if strings.Contains(key, "EBS:Volume") {
								// If volume, we need to get hourly cost and add it to the PV object
								cost := offerTerm.PriceDimensions[sku.(string)+OnDemandRateCode+HourlyRateCode].PricePerUnit.USD
								costFloat, _ := strconv.ParseFloat(cost, 64)
								hourlyPrice := costFloat / 730

								aws.Pricing[key].PV.Cost = strconv.FormatFloat(hourlyPrice, 'f', -1, 64)
							}
						}
					}
					_, err = dec.Token()
					if err != nil {
						return err
					}
				}
				_, err = dec.Token()
				if err != nil {
					return err
				}
			}
		}
	}

	// Always run spot pricing refresh when performing download
	aws.refreshSpotPricing(true)

	// Only start a single refresh goroutine
	if !aws.SpotRefreshRunning {
		aws.SpotRefreshRunning = true

		go func() {
			defer errors.HandlePanic()

			for {
				klog.Infof("Spot Pricing Refresh scheduled in %.2f minutes.", SpotRefreshDuration.Minutes())
				time.Sleep(SpotRefreshDuration)

				// Reoccurring refresh checks update times
				aws.refreshSpotPricing(false)
			}
		}()
	}

	return nil
}

func (aws *AWS) refreshSpotPricing(force bool) {
	aws.SpotPricingLock.Lock()
	defer aws.SpotPricingLock.Unlock()

	now := time.Now().UTC()
	updateTime := now.Add(-SpotRefreshDuration)

	// Return if there was an update time set and an hour hasn't elapsed
	if !force && aws.SpotPricingUpdatedAt != nil && aws.SpotPricingUpdatedAt.After(updateTime) {
		return
	}

	sp, err := parseSpotData(aws.SpotDataBucket, aws.SpotDataPrefix, aws.ProjectID, aws.SpotDataRegion, aws.ServiceKeyName, aws.ServiceKeySecret)
	if err != nil {
		klog.V(1).Infof("Skipping AWS spot data download: %s", err.Error())
		return
	}

	// update time last updated
	aws.SpotPricingUpdatedAt = &now
	aws.SpotPricingByInstanceID = sp
}

// Stubbed NetworkPricing for AWS. Pull directly from aws.json for now
func (aws *AWS) NetworkPricing() (*Network, error) {
	cpricing, err := aws.Config.GetCustomPricingData()
	if err != nil {
		return nil, err
	}
	znec, err := strconv.ParseFloat(cpricing.ZoneNetworkEgress, 64)
	if err != nil {
		return nil, err
	}
	rnec, err := strconv.ParseFloat(cpricing.RegionNetworkEgress, 64)
	if err != nil {
		return nil, err
	}
	inec, err := strconv.ParseFloat(cpricing.InternetNetworkEgress, 64)
	if err != nil {
		return nil, err
	}

	return &Network{
		ZoneNetworkEgressCost:     znec,
		RegionNetworkEgressCost:   rnec,
		InternetNetworkEgressCost: inec,
	}, nil
}

// AllNodePricing returns all the billing data fetched.
func (aws *AWS) AllNodePricing() (interface{}, error) {
	aws.DownloadPricingDataLock.RLock()
	defer aws.DownloadPricingDataLock.RUnlock()
	return aws.Pricing, nil
}

func (aws *AWS) spotPricing(instanceID string) (*spotInfo, bool) {
	aws.SpotPricingLock.RLock()
	defer aws.SpotPricingLock.RUnlock()

	info, ok := aws.SpotPricingByInstanceID[instanceID]
	return info, ok
}

func (aws *AWS) reservedInstancePricing(instanceID string) (*RIData, bool) {
	aws.RIDataLock.RLock()
	defer aws.RIDataLock.RUnlock()

	data, ok := aws.RIPricingByInstanceID[instanceID]
	return data, ok
}

func (aws *AWS) createNode(terms *AWSProductTerms, usageType string, k Key) (*Node, error) {
	key := k.Features()

	if spotInfo, ok := aws.spotPricing(k.ID()); ok {
		var spotcost string
		klog.V(3).Infof("Looking up spot data from feed for node %s", k.ID())
		arr := strings.Split(spotInfo.Charge, " ")
		if len(arr) == 2 {
			spotcost = arr[0]
		} else {
			klog.V(2).Infof("Spot data for node %s is missing", k.ID())
		}
		return &Node{
			Cost:         spotcost,
			VCPU:         terms.VCpu,
			RAM:          terms.Memory,
			GPU:          terms.GPU,
			Storage:      terms.Storage,
			BaseCPUPrice: aws.BaseCPUPrice,
			BaseRAMPrice: aws.BaseRAMPrice,
			BaseGPUPrice: aws.BaseGPUPrice,
			UsageType:    usageType,
		}, nil
	} else if aws.isPreemptible(key) { // Preemptible but we don't have any data in the pricing report.
		klog.Infof("Node %s marked preemitible but we have no data in spot feed", k.ID())
		return &Node{
			VCPU:         terms.VCpu,
			VCPUCost:     aws.BaseSpotCPUPrice,
			RAM:          terms.Memory,
			GPU:          terms.GPU,
			RAMCost:      aws.BaseSpotRAMPrice,
			Storage:      terms.Storage,
			BaseCPUPrice: aws.BaseCPUPrice,
			BaseRAMPrice: aws.BaseRAMPrice,
			BaseGPUPrice: aws.BaseGPUPrice,
			UsageType:    usageType,
		}, nil
	} else if ri, ok := aws.reservedInstancePricing(k.ID()); ok {
		strCost := fmt.Sprintf("%f", ri.EffectiveCost)
		return &Node{
			Cost:         strCost,
			VCPU:         terms.VCpu,
			RAM:          terms.Memory,
			GPU:          terms.GPU,
			Storage:      terms.Storage,
			BaseCPUPrice: aws.BaseCPUPrice,
			BaseRAMPrice: aws.BaseRAMPrice,
			BaseGPUPrice: aws.BaseGPUPrice,
			UsageType:    usageType,
		}, nil

	}
	c, ok := terms.OnDemand.PriceDimensions[terms.Sku+OnDemandRateCode+HourlyRateCode]
	if !ok {
		return nil, fmt.Errorf("Could not fetch data for \"%s\"", k.ID())
	}
	cost := c.PricePerUnit.USD
	return &Node{
		Cost:         cost,
		VCPU:         terms.VCpu,
		RAM:          terms.Memory,
		GPU:          terms.GPU,
		Storage:      terms.Storage,
		BaseCPUPrice: aws.BaseCPUPrice,
		BaseRAMPrice: aws.BaseRAMPrice,
		BaseGPUPrice: aws.BaseGPUPrice,
		UsageType:    usageType,
	}, nil
}

// NodePricing takes in a key from GetKey and returns a Node object for use in building the cost model.
func (aws *AWS) NodePricing(k Key) (*Node, error) {
	aws.DownloadPricingDataLock.RLock()
	defer aws.DownloadPricingDataLock.RUnlock()

	key := k.Features()
	usageType := "ondemand"
	if aws.isPreemptible(key) {
		usageType = "preemptible"
	}

	terms, ok := aws.Pricing[key]
	if ok {
		return aws.createNode(terms, usageType, k)
	} else if _, ok := aws.ValidPricingKeys[key]; ok {
		aws.DownloadPricingDataLock.RUnlock()
		err := aws.DownloadPricingData()
		aws.DownloadPricingDataLock.RLock()
		if err != nil {
			return &Node{
				Cost:             aws.BaseCPUPrice,
				BaseCPUPrice:     aws.BaseCPUPrice,
				BaseRAMPrice:     aws.BaseRAMPrice,
				BaseGPUPrice:     aws.BaseGPUPrice,
				UsageType:        usageType,
				UsesBaseCPUPrice: true,
			}, err
		}
		terms, termsOk := aws.Pricing[key]
		if !termsOk {
			return &Node{
				Cost:             aws.BaseCPUPrice,
				BaseCPUPrice:     aws.BaseCPUPrice,
				BaseRAMPrice:     aws.BaseRAMPrice,
				BaseGPUPrice:     aws.BaseGPUPrice,
				UsageType:        usageType,
				UsesBaseCPUPrice: true,
			}, fmt.Errorf("Unable to find any Pricing data for \"%s\"", key)
		}
		return aws.createNode(terms, usageType, k)
	} else { // Fall back to base pricing if we can't find the key.
		klog.V(1).Infof("Invalid Pricing Key \"%s\"", key)
		return &Node{
			Cost:             aws.BaseCPUPrice,
			BaseCPUPrice:     aws.BaseCPUPrice,
			BaseRAMPrice:     aws.BaseRAMPrice,
			BaseGPUPrice:     aws.BaseGPUPrice,
			UsageType:        usageType,
			UsesBaseCPUPrice: true,
		}, nil
	}
}

// ClusterInfo returns an object that represents the cluster. TODO: actually return the name of the cluster. Blocked on cluster federation.
func (awsProvider *AWS) ClusterInfo() (map[string]string, error) {
	defaultClusterName := "AWS Cluster #1"
	c, err := awsProvider.GetConfig()
	if err != nil {
		return nil, err
	}

	remote := os.Getenv(remoteEnabled)
	remoteEnabled := false
	if os.Getenv(remote) == "true" {
		remoteEnabled = true
	}

	if c.ClusterName != "" {
		m := make(map[string]string)
		m["name"] = c.ClusterName
		m["provider"] = "AWS"
		m["id"] = os.Getenv(clusterIDKey)
		m["remoteReadEnabled"] = strconv.FormatBool(remoteEnabled)
		return m, nil
	}
	makeStructure := func(clusterName string) (map[string]string, error) {
		klog.V(2).Infof("Returning \"%s\" as ClusterName", clusterName)
		m := make(map[string]string)
		m["name"] = clusterName
		m["provider"] = "AWS"
		m["id"] = os.Getenv(clusterIDKey)
		m["remoteReadEnabled"] = strconv.FormatBool(remoteEnabled)
		return m, nil
	}

	maybeClusterId := os.Getenv(ClusterIdEnvVar)
	if len(maybeClusterId) != 0 {
		return makeStructure(maybeClusterId)
	}
	// TODO: This should be cached, it can take a long time to hit the API
	//provIdRx := regexp.MustCompile("aws:///([^/]+)/([^/]+)")
	//clusterIdRx := regexp.MustCompile("^kubernetes\\.io/cluster/([^/]+)")
	//klog.Infof("nodelist get here %s", time.Now())
	//nodeList := awsProvider.Clientset.GetAllNodes()
	//klog.Infof("nodelist done here %s", time.Now())
	/*for _, n := range nodeList {
		region := ""
		instanceId := ""
		providerId := n.Spec.ProviderID
		for matchNum, group := range provIdRx.FindStringSubmatch(providerId) {
			if matchNum == 1 {
				region = group
			} else if matchNum == 2 {
				instanceId = group
			}
		}
		if len(instanceId) == 0 {
			klog.V(2).Infof("Unable to decode Node.ProviderID \"%s\", skipping it", providerId)
			continue
		}
		c := &aws.Config{
			Region: aws.String(region),
		}
		s := session.Must(session.NewSession(c))
		ec2Svc := ec2.New(s)
		di, diErr := ec2Svc.DescribeInstances(&ec2.DescribeInstancesInput{
			InstanceIds: []*string{
				aws.String(instanceId),
			},
		})
		if diErr != nil {
			klog.Infof("Error describing instances: %s", diErr)
			continue
		}
		if len(di.Reservations) != 1 {
			klog.V(2).Infof("Expected 1 Reservation back from DescribeInstances(%s), received %d", instanceId, len(di.Reservations))
			continue
		}
		res := di.Reservations[0]
		if len(res.Instances) != 1 {
			klog.V(2).Infof("Expected 1 Instance back from DescribeInstances(%s), received %d", instanceId, len(res.Instances))
			continue
		}
		inst := res.Instances[0]
		for _, tag := range inst.Tags {
			tagKey := *tag.Key
			for matchNum, group := range clusterIdRx.FindStringSubmatch(tagKey) {
				if matchNum != 1 {
					continue
				}
				return makeStructure(group)
			}
		}
	}*/
	klog.V(2).Infof("Unable to sniff out cluster ID, perhaps set $%s to force one", ClusterIdEnvVar)
	return makeStructure(defaultClusterName)
}

// Gets the aws key id and secret
func (aws *AWS) getAWSAuth(forceReload bool, cp *CustomPricing) (string, string) {
	// 1. Check config values first (set from frontend UI)
	if cp.ServiceKeyName != "" && cp.ServiceKeySecret != "" {
		return cp.ServiceKeyName, cp.ServiceKeySecret
	}

	// 2. Check for secret
	s, _ := aws.loadAWSAuthSecret(forceReload)
	if s != nil && s.AccessKeyID != "" && s.SecretAccessKey != "" {
		return s.AccessKeyID, s.SecretAccessKey
	}

	// 3. Fall back to env vars
	return os.Getenv(awsAccessKeyIDEnvVar), os.Getenv(awsAccessKeySecretEnvVar)
}

// Load once and cache the result (even on failure). This is an install time secret, so
// we don't expect the secret to change. If it does, however, we can force reload using
// the input parameter.
func (aws *AWS) loadAWSAuthSecret(force bool) (*AWSAccessKey, error) {
	if !force && loadedAWSSecret {
		return awsSecret, nil
	}
	loadedAWSSecret = true

	exists, err := util.FileExists(authSecretPath)
	if !exists || err != nil {
		return nil, fmt.Errorf("Failed to locate service account file: %s", authSecretPath)
	}

	result, err := ioutil.ReadFile(authSecretPath)
	if err != nil {
		return nil, err
	}

	var ak AWSAccessKey
	err = json.Unmarshal(result, &ak)
	if err != nil {
		return nil, err
	}

	awsSecret = &ak
	return awsSecret, nil
}

func (aws *AWS) configureAWSAuth() error {
	accessKeyID := aws.ServiceKeyName
	accessKeySecret := aws.ServiceKeySecret
	if accessKeyID != "" && accessKeySecret != "" { // credentials may exist on the actual AWS node-- if so, use those. If not, override with the service key
		err := os.Setenv(awsAccessKeyIDEnvVar, accessKeyID)
		if err != nil {
			return err
		}
		err = os.Setenv(awsAccessKeySecretEnvVar, accessKeySecret)
		if err != nil {
			return err
		}
	}
	return nil
}

func getClusterConfig(ccFile string) (map[string]string, error) {
	clusterConfig, err := os.Open(ccFile)
	if err != nil {
		return nil, err
	}
	defer clusterConfig.Close()
	b, err := ioutil.ReadAll(clusterConfig)
	if err != nil {
		return nil, err
	}
	var clusterConf map[string]string
	err = json.Unmarshal([]byte(b), &clusterConf)
	if err != nil {
		return nil, err
	}

	return clusterConf, nil
}

// SetKeyEnv ensures that the two environment variables necessary to configure
// a new AWS Session are set.
func (a *AWS) SetKeyEnv() error {
	// TODO add this to the helm chart, mirroring the cost-model
	// configPath := os.Getenv("CONFIG_PATH")
	configPath := defaultConfigPath
	path := configPath + "aws.json"

	if _, err := os.Stat(path); err != nil {
		if os.IsNotExist(err) {
			log.Printf("error: file %s does not exist", path)
		} else {
			log.Printf("error: %s", err)
		}
		return err
	}

	jsonFile, err := os.Open(path)
	defer jsonFile.Close()

	configMap := map[string]string{}
	configBytes, err := ioutil.ReadAll(jsonFile)
	if err != nil {
		return err
	}
	json.Unmarshal([]byte(configBytes), &configMap)

	keyName := configMap["awsServiceKeyName"]
	keySecret := configMap["awsServiceKeySecret"]

	// These are required before calling NewEnvCredentials below
	os.Setenv("AWS_ACCESS_KEY_ID", keyName)
	os.Setenv("AWS_SECRET_ACCESS_KEY", keySecret)

	return nil
}

func (a *AWS) getAddressesForRegion(region string) (*ec2.DescribeAddressesOutput, error) {
	sess, err := session.NewSession(&aws.Config{
		Region:      aws.String(region),
		Credentials: credentials.NewEnvCredentials(),
	})
	if err != nil {
		return nil, err
	}

	ec2Svc := ec2.New(sess)
	return ec2Svc.DescribeAddresses(&ec2.DescribeAddressesInput{})
}

func (a *AWS) GetAddresses() ([]byte, error) {
	if err := a.SetKeyEnv(); err != nil {
		return nil, err
	}

	addressCh := make(chan *ec2.DescribeAddressesOutput, len(awsRegions))
	errorCh := make(chan error, len(awsRegions))

	var wg sync.WaitGroup
	wg.Add(len(awsRegions))

	// Get volumes from each AWS region
	for _, r := range awsRegions {
		// Fetch IP address response and send results and errors to their
		// respective channels
		go func(region string) {
			defer wg.Done()
			defer errors.HandlePanic()

			// Query for first page of volume results
			resp, err := a.getAddressesForRegion(region)
			if err != nil {
				if aerr, ok := err.(awserr.Error); ok {
					switch aerr.Code() {
					default:
						errorCh <- aerr
					}
					return
				} else {
					errorCh <- err
					return
				}
			}
			addressCh <- resp
		}(r)
	}

	// Close the result channels after everything has been sent
	go func() {
		defer errors.HandlePanic()

		wg.Wait()
		close(errorCh)
		close(addressCh)
	}()

	addresses := []*ec2.Address{}
	for adds := range addressCh {
		addresses = append(addresses, adds.Addresses...)
	}

	errors := []error{}
	for err := range errorCh {
		log.Printf("[Warning]: unable to get addresses: %s", err)
		errors = append(errors, err)
	}

	// Return error if no addresses are returned
	if len(errors) > 0 && len(addresses) == 0 {
		return nil, fmt.Errorf("%d error(s) retrieving addresses: %v", len(errors), errors)
	}

	// Format the response this way to match the JSON-encoded formatting of a single response
	// from DescribeAddresss, so that consumers can always expect AWS disk responses to have
	// a "Addresss" key at the top level.
	return json.Marshal(map[string][]*ec2.Address{
		"Addresses": addresses,
	})
}

func (a *AWS) getDisksForRegion(region string, maxResults int64, nextToken *string) (*ec2.DescribeVolumesOutput, error) {
	sess, err := session.NewSession(&aws.Config{
		Region:      aws.String(region),
		Credentials: credentials.NewEnvCredentials(),
	})
	if err != nil {
		return nil, err
	}

	ec2Svc := ec2.New(sess)
	return ec2Svc.DescribeVolumes(&ec2.DescribeVolumesInput{
		MaxResults: &maxResults,
		NextToken:  nextToken,
	})
}

// GetDisks returns the AWS disks backing PVs. Useful because sometimes k8s will not clean up PVs correctly. Requires a json config in /var/configs with key region.
func (a *AWS) GetDisks() ([]byte, error) {
	if err := a.SetKeyEnv(); err != nil {
		return nil, err
	}

	volumeCh := make(chan *ec2.DescribeVolumesOutput, len(awsRegions))
	errorCh := make(chan error, len(awsRegions))

	var wg sync.WaitGroup
	wg.Add(len(awsRegions))

	// Get volumes from each AWS region
	for _, r := range awsRegions {
		// Fetch volume response and send results and errors to their
		// respective channels
		go func(region string) {
			defer wg.Done()
			defer errors.HandlePanic()

			// Query for first page of volume results
			resp, err := a.getDisksForRegion(region, 1000, nil)
			if err != nil {
				if aerr, ok := err.(awserr.Error); ok {
					switch aerr.Code() {
					default:
						errorCh <- aerr
					}
					return
				} else {
					errorCh <- err
					return
				}
			}
			volumeCh <- resp

			// A NextToken indicates more pages of results. Keep querying
			// until all pages are retrieved.
			for resp.NextToken != nil {
				resp, err = a.getDisksForRegion(region, 100, resp.NextToken)
				if err != nil {
					if aerr, ok := err.(awserr.Error); ok {
						switch aerr.Code() {
						default:
							errorCh <- aerr
						}
						return
					} else {
						errorCh <- err
						return
					}
				}
				volumeCh <- resp
			}
		}(r)
	}

	// Close the result channels after everything has been sent
	go func() {
		defer errors.HandlePanic()

		wg.Wait()
		close(errorCh)
		close(volumeCh)
	}()

	volumes := []*ec2.Volume{}
	for vols := range volumeCh {
		volumes = append(volumes, vols.Volumes...)
	}

	errors := []error{}
	for err := range errorCh {
		log.Printf("[Warning]: unable to get disks: %s", err)
		errors = append(errors, err)
	}

	// Return error if no volumes are returned
	if len(errors) > 0 && len(volumes) == 0 {
		return nil, fmt.Errorf("%d error(s) retrieving volumes: %v", len(errors), errors)
	}

	// Format the response this way to match the JSON-encoded formatting of a single response
	// from DescribeVolumes, so that consumers can always expect AWS disk responses to have
	// a "Volumes" key at the top level.
	return json.Marshal(map[string][]*ec2.Volume{
		"Volumes": volumes,
	})
}

// ConvertToGlueColumnFormat takes a string and runs through various regex
// and string replacement statements to convert it to a format compatible
// with AWS Glue and Athena column names.
// Following guidance from AWS provided here ('Column Names' section):
// https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/run-athena-sql.html
// It returns a string containing the column name in proper column name format and length.
func ConvertToGlueColumnFormat(column_name string) string {
	klog.V(5).Infof("Converting string \"%s\" to proper AWS Glue column name.", column_name)

	// An underscore is added in front of uppercase letters
	capital_underscore := regexp.MustCompile(`[A-Z]`)
	final := capital_underscore.ReplaceAllString(column_name, `_$0`)

	// Any non-alphanumeric characters are replaced with an underscore
	no_space_punc := regexp.MustCompile(`[\s]{1,}|[^A-Za-z0-9]`)
	final = no_space_punc.ReplaceAllString(final, "_")

	// Duplicate underscores are removed
	no_dup_underscore := regexp.MustCompile(`_{2,}`)
	final = no_dup_underscore.ReplaceAllString(final, "_")

	// Any leading and trailing underscores are removed
	no_front_end_underscore := regexp.MustCompile(`(^\_|\_$)`)
	final = no_front_end_underscore.ReplaceAllString(final, "")

	// Uppercase to lowercase
	final = strings.ToLower(final)

	// Longer column name than expected - remove _ left to right
	allowed_col_len := 128
	undersc_to_remove := len(final) - allowed_col_len
	if undersc_to_remove > 0 {
		final = strings.Replace(final, "_", "", undersc_to_remove)
	}

	// If removing all of the underscores still didn't
	// make the column name < 128 characters, trim it!
	if len(final) > allowed_col_len {
		final = final[:allowed_col_len]
	}

	klog.V(5).Infof("Column name being returned: \"%s\". Length: \"%d\".", final, len(final))

	return final
}

func generateAWSGroupBy(lastIdx int) string {
	sequence := []string{}
	for i := 1; i < lastIdx+1; i++ {
		sequence = append(sequence, strconv.Itoa(i))
	}
	return strings.Join(sequence, ",")
}

func (a *AWS) QueryAthenaBillingData(query string) (*athena.GetQueryResultsOutput, error) {
	customPricing, err := a.GetConfig()
	if err != nil {
		return nil, err
	}
	if customPricing.ServiceKeyName != "" {
		err = os.Setenv(awsAccessKeyIDEnvVar, customPricing.ServiceKeyName)
		if err != nil {
			return nil, err
		}
		err = os.Setenv(awsAccessKeySecretEnvVar, customPricing.ServiceKeySecret)
		if err != nil {
			return nil, err
		}
	}
	region := aws.String(customPricing.AthenaRegion)
	resultsBucket := customPricing.AthenaBucketName
	database := customPricing.AthenaDatabase
	c := &aws.Config{
		Region: region,
	}
	s := session.Must(session.NewSession(c))
	svc := athena.New(s)
	if customPricing.MasterPayerARN != "" {
		creds := stscreds.NewCredentials(s, customPricing.MasterPayerARN)
		svc = athena.New(s, &aws.Config{
			Region:      region,
			Credentials: creds,
		})
	}

	var e athena.StartQueryExecutionInput

	var r athena.ResultConfiguration
	r.SetOutputLocation(resultsBucket)
	e.SetResultConfiguration(&r)

	e.SetQueryString(query)
	var q athena.QueryExecutionContext
	q.SetDatabase(database)
	e.SetQueryExecutionContext(&q)

	res, err := svc.StartQueryExecution(&e)
	if err != nil {
		return nil, err
	}

	klog.V(2).Infof("StartQueryExecution result:")
	klog.V(2).Infof(res.GoString())

	var qri athena.GetQueryExecutionInput
	qri.SetQueryExecutionId(*res.QueryExecutionId)

	var qrop *athena.GetQueryExecutionOutput
	duration := time.Duration(2) * time.Second // Pause for 2 seconds

	for {
		qrop, err = svc.GetQueryExecution(&qri)
		if err != nil {
			return nil, err
		}
		if *qrop.QueryExecution.Status.State != "RUNNING" && *qrop.QueryExecution.Status.State != "QUEUED" {
			break
		}
		time.Sleep(duration)
	}
	if *qrop.QueryExecution.Status.State == "SUCCEEDED" {

		var ip athena.GetQueryResultsInput
		ip.SetQueryExecutionId(*res.QueryExecutionId)

		return svc.GetQueryResults(&ip)
	} else {
		return nil, fmt.Errorf("No results available for %s", query)
	}
}

type RIData struct {
	ResourceID     string
	EffectiveCost  float64
	ReservationARN string
	MostRecentDate string
}

func (a *AWS) GetReservationDataFromAthena() error {
	cfg, err := a.GetConfig()
	if err != nil {
		return err
	}
	if cfg.AthenaBucketName == "" {
		return fmt.Errorf("No Athena Bucket configured")
	}
	if a.RIPricingByInstanceID == nil {
		a.RIPricingByInstanceID = make(map[string]*RIData)
	}
	tNow := time.Now()
	tOneDayAgo := tNow.Add(time.Duration(-25) * time.Hour) // Also get files from one day ago to avoid boundary conditions
	start := tOneDayAgo.Format("2006-01-02")
	end := tNow.Format("2006-01-02")
	q := `SELECT   
		line_item_usage_start_date,
		reservation_reservation_a_r_n,
		line_item_resource_id,
		reservation_effective_cost
	FROM %s as cost_data
	WHERE line_item_usage_start_date BETWEEN date '%s' AND date '%s'
	AND reservation_reservation_a_r_n <> '' ORDER BY 
	line_item_usage_start_date DESC`
	query := fmt.Sprintf(q, cfg.AthenaTable, start, end)
	op, err := a.QueryAthenaBillingData(query)
	if err != nil {
		return fmt.Errorf("Error fetching Reserved Instance Data: %s", err)
	}
	klog.Infof("Fetching RI data...")
	if len(op.ResultSet.Rows) > 1 {
		a.RIDataLock.Lock()
		mostRecentDate := ""
		for _, r := range op.ResultSet.Rows[1:(len(op.ResultSet.Rows) - 1)] {
			d := *r.Data[0].VarCharValue
			if mostRecentDate == "" {
				mostRecentDate = d
			} else if mostRecentDate != d { // Get all most recent assignments
				break
			}
			cost, err := strconv.ParseFloat(*r.Data[3].VarCharValue, 64)
			if err != nil {
				klog.Infof("Error converting `%s` from float ", *r.Data[3].VarCharValue)
			}
			r := &RIData{
				ResourceID:     *r.Data[2].VarCharValue,
				EffectiveCost:  cost,
				ReservationARN: *r.Data[1].VarCharValue,
				MostRecentDate: d,
			}
			a.RIPricingByInstanceID[r.ResourceID] = r
		}
		klog.V(1).Infof("Found %d reserved instances", len(a.RIPricingByInstanceID))
		for k, r := range a.RIPricingByInstanceID {
			klog.V(1).Infof("Reserved Instance Data found for node %s : %f at time %s", k, r.EffectiveCost, r.MostRecentDate)
		}
		a.RIDataLock.Unlock()
	} else {
		klog.Infof("No reserved instance data found")
	}
	return nil
}

// ExternalAllocations represents tagged assets outside the scope of kubernetes.
// "start" and "end" are dates of the format YYYY-MM-DD
// "aggregator" is the tag used to determine how to allocate those assets, ie namespace, pod, etc.
func (a *AWS) ExternalAllocations(start string, end string, aggregators []string, filterType string, filterValue string, crossCluster bool) ([]*OutOfClusterAllocation, error) {
	customPricing, err := a.GetConfig()
	if err != nil {
		return nil, err
	}
	formattedAggregators := []string{}
	for _, agg := range aggregators {
		aggregator_column_name := "resource_tags_user_" + agg
		aggregator_column_name = ConvertToGlueColumnFormat(aggregator_column_name)
		formattedAggregators = append(formattedAggregators, aggregator_column_name)
	}
	aggregatorNames := strings.Join(formattedAggregators, ",")
	aggregatorOr := strings.Join(formattedAggregators, " <> '' OR ")
	aggregatorOr = aggregatorOr + " <> ''"

	filter_column_name := "resource_tags_user_" + filterType
	filter_column_name = ConvertToGlueColumnFormat(filter_column_name)

	var query string
	var lastIdx int
	if filterType != "kubernetes_" { // This gets appended upstream and is equivalent to no filter.
		lastIdx = len(formattedAggregators) + 3
		groupby := generateAWSGroupBy(lastIdx)
		query = fmt.Sprintf(`SELECT   
			CAST(line_item_usage_start_date AS DATE) as start_date,
			%s,
			line_item_product_code,
			%s,
			SUM(line_item_blended_cost) as blended_cost
		FROM %s as cost_data
		WHERE (%s='%s') AND line_item_usage_start_date BETWEEN date '%s' AND date '%s' AND (%s) 
		GROUP BY %s`, aggregatorNames, filter_column_name, customPricing.AthenaTable, filter_column_name, filterValue, start, end, aggregatorOr, groupby)
	} else {
		lastIdx = len(formattedAggregators) + 2
		groupby := generateAWSGroupBy(lastIdx)
		query = fmt.Sprintf(`SELECT   
			CAST(line_item_usage_start_date AS DATE) as start_date,
			%s,
			line_item_product_code,
			SUM(line_item_blended_cost) as blended_cost
		FROM %s as cost_data
		WHERE line_item_usage_start_date BETWEEN date '%s' AND date '%s' AND (%s)
		GROUP BY %s`, aggregatorNames, customPricing.AthenaTable, start, end, aggregatorOr, groupby)
	}

	klog.V(3).Infof("Running Query: %s", query)

	if customPricing.ServiceKeyName != "" {
		err = os.Setenv(awsAccessKeyIDEnvVar, customPricing.ServiceKeyName)
		if err != nil {
			return nil, err
		}
		err = os.Setenv(awsAccessKeySecretEnvVar, customPricing.ServiceKeySecret)
		if err != nil {
			return nil, err
		}
	}
	region := aws.String(customPricing.AthenaRegion)
	resultsBucket := customPricing.AthenaBucketName
	database := customPricing.AthenaDatabase
	c := &aws.Config{
		Region: region,
	}
	s := session.Must(session.NewSession(c))
	svc := athena.New(s)

	var e athena.StartQueryExecutionInput

	var r athena.ResultConfiguration
	r.SetOutputLocation(resultsBucket)
	e.SetResultConfiguration(&r)

	e.SetQueryString(query)
	var q athena.QueryExecutionContext
	q.SetDatabase(database)
	e.SetQueryExecutionContext(&q)

	res, err := svc.StartQueryExecution(&e)
	if err != nil {
		return nil, err
	}

	klog.V(2).Infof("StartQueryExecution result:")
	klog.V(2).Infof(res.GoString())

	var qri athena.GetQueryExecutionInput
	qri.SetQueryExecutionId(*res.QueryExecutionId)

	var qrop *athena.GetQueryExecutionOutput
	duration := time.Duration(2) * time.Second // Pause for 2 seconds

	for {
		qrop, err = svc.GetQueryExecution(&qri)
		if err != nil {
			return nil, err
		}
		if *qrop.QueryExecution.Status.State != "RUNNING" && *qrop.QueryExecution.Status.State != "QUEUED" {
			break
		}
		time.Sleep(duration)
	}
	var oocAllocs []*OutOfClusterAllocation
	if *qrop.QueryExecution.Status.State == "SUCCEEDED" {

		var ip athena.GetQueryResultsInput
		ip.SetQueryExecutionId(*res.QueryExecutionId)

		op, err := svc.GetQueryResults(&ip)
		if err != nil {
			return nil, err
		}
		if len(op.ResultSet.Rows) > 1 {
			for _, r := range op.ResultSet.Rows[1:(len(op.ResultSet.Rows))] {
				cost, err := strconv.ParseFloat(*r.Data[lastIdx].VarCharValue, 64)
				if err != nil {
					return nil, err
				}
				environment := ""
				for _, d := range r.Data[1 : len(formattedAggregators)+1] {
					if *d.VarCharValue != "" {
						environment = *d.VarCharValue // just set to the first nonempty match
					}
					break
				}
				ooc := &OutOfClusterAllocation{
					Aggregator:  strings.Join(aggregators, ","),
					Environment: environment,
					Service:     *r.Data[len(formattedAggregators)+1].VarCharValue,
					Cost:        cost,
				}
				oocAllocs = append(oocAllocs, ooc)
			}
		} else {
			klog.V(1).Infof("No results available for %s at database %s between %s and %s", strings.Join(formattedAggregators, ","), customPricing.AthenaTable, start, end)
		}
	}

	if customPricing.BillingDataDataset != "" && !crossCluster { // There is GCP data, meaning someone has tried to configure a GCP out-of-cluster allocation.
		gcp, err := NewCrossClusterProvider("gcp", "aws.json", a.Clientset)
		if err != nil {
			klog.Infof("Could not instantiate cross-cluster provider %s", err.Error())
		}
		gcpOOC, err := gcp.ExternalAllocations(start, end, aggregators, filterType, filterValue, true)
		if err != nil {
			klog.Infof("Could not fetch cross-cluster costs %s", err.Error())
		}
		oocAllocs = append(oocAllocs, gcpOOC...)
	}
	return oocAllocs, nil
}

// QuerySQL can query a properly configured Athena database.
// Used to fetch billing data.
// Requires a json config in /var/configs with key region, output, and database.
func (a *AWS) QuerySQL(query string) ([]byte, error) {
	customPricing, err := a.GetConfig()
	if err != nil {
		return nil, err
	}
	if customPricing.ServiceKeyName != "" {
		err = os.Setenv(awsAccessKeyIDEnvVar, customPricing.ServiceKeyName)
		if err != nil {
			return nil, err
		}
		err = os.Setenv(awsAccessKeySecretEnvVar, customPricing.ServiceKeySecret)
		if err != nil {
			return nil, err
		}
	}
	athenaConfigs, err := os.Open("/var/configs/athena.json")
	if err != nil {
		return nil, err
	}
	defer athenaConfigs.Close()
	b, err := ioutil.ReadAll(athenaConfigs)
	if err != nil {
		return nil, err
	}
	var athenaConf map[string]string
	json.Unmarshal([]byte(b), &athenaConf)
	region := aws.String(customPricing.AthenaRegion)
	resultsBucket := customPricing.AthenaBucketName
	database := customPricing.AthenaDatabase

	c := &aws.Config{
		Region: region,
	}
	s := session.Must(session.NewSession(c))
	svc := athena.New(s)

	var e athena.StartQueryExecutionInput

	var r athena.ResultConfiguration
	r.SetOutputLocation(resultsBucket)
	e.SetResultConfiguration(&r)

	e.SetQueryString(query)
	var q athena.QueryExecutionContext
	q.SetDatabase(database)
	e.SetQueryExecutionContext(&q)

	res, err := svc.StartQueryExecution(&e)
	if err != nil {
		return nil, err
	}

	klog.V(2).Infof("StartQueryExecution result:")
	klog.V(2).Infof(res.GoString())

	var qri athena.GetQueryExecutionInput
	qri.SetQueryExecutionId(*res.QueryExecutionId)

	var qrop *athena.GetQueryExecutionOutput
	duration := time.Duration(2) * time.Second // Pause for 2 seconds

	for {
		qrop, err = svc.GetQueryExecution(&qri)
		if err != nil {
			return nil, err
		}
		if *qrop.QueryExecution.Status.State != "RUNNING" && *qrop.QueryExecution.Status.State != "QUEUED" {
			break
		}
		time.Sleep(duration)
	}
	if *qrop.QueryExecution.Status.State == "SUCCEEDED" {

		var ip athena.GetQueryResultsInput
		ip.SetQueryExecutionId(*res.QueryExecutionId)

		op, err := svc.GetQueryResults(&ip)
		if err != nil {
			return nil, err
		}
		b, err := json.Marshal(op.ResultSet)
		if err != nil {
			return nil, err
		}

		return b, nil
	}
	return nil, fmt.Errorf("Error getting query results : %s", *qrop.QueryExecution.Status.State)
}

type spotInfo struct {
	Timestamp   string `csv:"Timestamp"`
	UsageType   string `csv:"UsageType"`
	Operation   string `csv:"Operation"`
	InstanceID  string `csv:"InstanceID"`
	MyBidID     string `csv:"MyBidID"`
	MyMaxPrice  string `csv:"MyMaxPrice"`
	MarketPrice string `csv:"MarketPrice"`
	Charge      string `csv:"Charge"`
	Version     string `csv:"Version"`
}

type fnames []*string

func (f fnames) Len() int {
	return len(f)
}

func (f fnames) Swap(i, j int) {
	f[i], f[j] = f[j], f[i]
}

func (f fnames) Less(i, j int) bool {
	key1 := strings.Split(*f[i], ".")
	key2 := strings.Split(*f[j], ".")

	t1, err := time.Parse("2006-01-02-15", key1[1])
	if err != nil {
		klog.V(1).Info("Unable to parse timestamp" + key1[1])
		return false
	}
	t2, err := time.Parse("2006-01-02-15", key2[1])
	if err != nil {
		klog.V(1).Info("Unable to parse timestamp" + key2[1])
		return false
	}
	return t1.Before(t2)
}

func parseSpotData(bucket string, prefix string, projectID string, region string, accessKeyID string, accessKeySecret string) (map[string]*spotInfo, error) {
	// credentials may exist on the actual AWS node-- if so, use those. If not, override with the service key
	if accessKeyID != "" && accessKeySecret != "" {
		err := os.Setenv(awsAccessKeyIDEnvVar, accessKeyID)
		if err != nil {
			return nil, err
		}
		err = os.Setenv(awsAccessKeySecretEnvVar, accessKeySecret)
		if err != nil {
			return nil, err
		}
	}
	s3Prefix := projectID
	if len(prefix) != 0 {
		s3Prefix = prefix + "/" + s3Prefix
	}

	c := aws.NewConfig().WithRegion(region)

	s := session.Must(session.NewSession(c))
	s3Svc := s3.New(s)
	downloader := s3manager.NewDownloaderWithClient(s3Svc)

	tNow := time.Now()
	tOneDayAgo := tNow.Add(time.Duration(-24) * time.Hour) // Also get files from one day ago to avoid boundary conditions
	ls := &s3.ListObjectsInput{
		Bucket: aws.String(bucket),
		Prefix: aws.String(s3Prefix + "." + tOneDayAgo.Format("2006-01-02")),
	}
	ls2 := &s3.ListObjectsInput{
		Bucket: aws.String(bucket),
		Prefix: aws.String(s3Prefix + "." + tNow.Format("2006-01-02")),
	}
	lso, err := s3Svc.ListObjects(ls)
	if err != nil {
		return nil, err
	}
	lsoLen := len(lso.Contents)
	klog.V(2).Infof("Found %d spot data files from yesterday", lsoLen)
	if lsoLen == 0 {
		klog.V(5).Infof("ListObjects \"s3://%s/%s\" produced no keys", *ls.Bucket, *ls.Prefix)
	}
	lso2, err := s3Svc.ListObjects(ls2)
	if err != nil {
		return nil, err
	}
	lso2Len := len(lso2.Contents)
	klog.V(2).Infof("Found %d spot data files from today", lso2Len)
	if lso2Len == 0 {
		klog.V(5).Infof("ListObjects \"s3://%s/%s\" produced no keys", *ls2.Bucket, *ls2.Prefix)
	}

	// TODO: Worth it to use LastModifiedDate to determine if we should reparse the spot data?
	var keys []*string
	for _, obj := range lso.Contents {
		keys = append(keys, obj.Key)
	}
	for _, obj := range lso2.Contents {
		keys = append(keys, obj.Key)
	}

	versionRx := regexp.MustCompile("^#Version: (\\d+)\\.\\d+$")
	header, err := csvutil.Header(spotInfo{}, "csv")
	if err != nil {
		return nil, err
	}
	fieldsPerRecord := len(header)

	spots := make(map[string]*spotInfo)
	for _, key := range keys {
		getObj := &s3.GetObjectInput{
			Bucket: aws.String(bucket),
			Key:    key,
		}

		buf := aws.NewWriteAtBuffer([]byte{})
		_, err := downloader.Download(buf, getObj)
		if err != nil {
			return nil, err
		}

		r := bytes.NewReader(buf.Bytes())

		gr, err := gzip.NewReader(r)
		if err != nil {
			return nil, err
		}

		csvReader := csv.NewReader(gr)
		csvReader.Comma = '\t'
		csvReader.FieldsPerRecord = fieldsPerRecord

		dec, err := csvutil.NewDecoder(csvReader, header...)
		if err != nil {
			return nil, err
		}

		var foundVersion string
		for {
			spot := spotInfo{}
			err := dec.Decode(&spot)
			csvParseErr, isCsvParseErr := err.(*csv.ParseError)
			if err == io.EOF {
				break
			} else if err == csvutil.ErrFieldCount || (isCsvParseErr && csvParseErr.Err == csv.ErrFieldCount) {
				rec := dec.Record()
				// the first two "Record()" will be the comment lines
				// and they show up as len() == 1
				// the first of which is "#Version"
				// the second of which is "#Fields: "
				if len(rec) != 1 {
					klog.V(2).Infof("Expected %d spot info fields but received %d: %s", fieldsPerRecord, len(rec), rec)
					continue
				}
				if len(foundVersion) == 0 {
					spotFeedVersion := rec[0]
					klog.V(4).Infof("Spot feed version is \"%s\"", spotFeedVersion)
					matches := versionRx.FindStringSubmatch(spotFeedVersion)
					if matches != nil {
						foundVersion = matches[1]
						if foundVersion != supportedSpotFeedVersion {
							klog.V(2).Infof("Unsupported spot info feed version: wanted \"%s\" got \"%s\"", supportedSpotFeedVersion, foundVersion)
							break
						}
					}
					continue
				} else if strings.Index(rec[0], "#") == 0 {
					continue
				} else {
					klog.V(3).Infof("skipping non-TSV line: %s", rec)
					continue
				}
			} else if err != nil {
				klog.V(2).Infof("Error during spot info decode: %+v", err)
				continue
			}

			klog.V(1).Infof("Found spot info for: %s", spot.InstanceID)
			spots[spot.InstanceID] = &spot
		}
		gr.Close()
	}
	return spots, nil
}

func (a *AWS) ApplyReservedInstancePricing(nodes map[string]*Node) {
	/*
		numReserved := len(a.ReservedInstances)

		// Early return if no reserved instance data loaded
		if numReserved == 0 {
			klog.V(4).Infof("[Reserved] No Reserved Instances")
			return
		}

		cfg, err := a.GetConfig()
		defaultCPU, err := strconv.ParseFloat(cfg.CPU, 64)
		if err != nil {
			klog.V(3).Infof("Could not parse default cpu price")
			defaultCPU = 0.031611
		}

		defaultRAM, err := strconv.ParseFloat(cfg.RAM, 64)
		if err != nil {
			klog.V(3).Infof("Could not parse default ram price")
			defaultRAM = 0.004237
		}

		cpuToRAMRatio := defaultCPU / defaultRAM

		now := time.Now()

		instances := make(map[string][]*AWSReservedInstance)
		for _, r := range a.ReservedInstances {
			if now.Before(r.StartDate) || now.After(r.EndDate) {
				klog.V(1).Infof("[Reserved] Skipped Reserved Instance due to dates")
				continue
			}

			_, ok := instances[r.Region]
			if !ok {
				instances[r.Region] = []*AWSReservedInstance{r}
			} else {
				instances[r.Region] = append(instances[r.Region], r)
			}
		}

		awsNodes := make(map[string]*v1.Node)
		currentNodes := a.Clientset.GetAllNodes()

		// Create a node name -> node map
		for _, awsNode := range currentNodes {
			awsNodes[awsNode.GetName()] = awsNode
		}

		// go through all provider nodes using k8s nodes for region
		for nodeName, node := range nodes {
			// Reset reserved allocation to prevent double allocation
			node.Reserved = nil

			kNode, ok := awsNodes[nodeName]
			if !ok {
				klog.V(1).Infof("[Reserved] Could not find K8s Node with name: %s", nodeName)
				continue
			}

			nodeRegion, ok := kNode.Labels[v1.LabelZoneRegion]
			if !ok {
				klog.V(1).Infof("[Reserved] Could not find node region")
				continue
			}

			reservedInstances, ok := instances[nodeRegion]
			if !ok {
				klog.V(1).Infof("[Reserved] Could not find counters for region: %s", nodeRegion)
				continue
			}

			// Determine the InstanceType of the node
			instanceType, ok := kNode.Labels["beta.kubernetes.io/instance-type"]
			if !ok {
				continue
			}

			ramBytes, err := strconv.ParseFloat(node.RAMBytes, 64)
			if err != nil {
				continue
			}
			ramGB := ramBytes / 1024 / 1024 / 1024

			cpu, err := strconv.ParseFloat(node.VCPU, 64)
			if err != nil {
				continue
			}

			ramMultiple := cpu*cpuToRAMRatio + ramGB

			node.Reserved = &ReservedInstanceData{
				ReservedCPU: 0,
				ReservedRAM: 0,
			}

			for i, reservedInstance := range reservedInstances {
				if reservedInstance.InstanceType == instanceType {
					// Use < 0 to mark as ALL
					node.Reserved.ReservedCPU = -1
					node.Reserved.ReservedRAM = -1

					// Set Costs based on CPU/RAM ratios
					ramPrice := reservedInstance.PricePerHour / ramMultiple
					node.Reserved.CPUCost = ramPrice * cpuToRAMRatio
					node.Reserved.RAMCost = ramPrice

					// Remove the reserve from the temporary slice to prevent
					// being reallocated
					instances[nodeRegion] = append(reservedInstances[:i], reservedInstances[i+1:]...)
					break
				}
			}
		}*/
}

type AWSReservedInstance struct {
	Zone           string
	Region         string
	InstanceType   string
	InstanceCount  int64
	InstanceTenacy string
	StartDate      time.Time
	EndDate        time.Time
	PricePerHour   float64
}

func (ari *AWSReservedInstance) String() string {
	return fmt.Sprintf("[Zone: %s, Region: %s, Type: %s, Count: %d, Tenacy: %s, Start: %+v, End: %+v, Price: %f]", ari.Zone, ari.Region, ari.InstanceType, ari.InstanceCount, ari.InstanceTenacy, ari.StartDate, ari.EndDate, ari.PricePerHour)
}

func isReservedInstanceHourlyPrice(rc *ec2.RecurringCharge) bool {
	return rc != nil && rc.Frequency != nil && *rc.Frequency == "Hourly"
}

func getReservedInstancePrice(ri *ec2.ReservedInstances) (float64, error) {
	var pricePerHour float64
	if len(ri.RecurringCharges) > 0 {
		for _, rc := range ri.RecurringCharges {
			if isReservedInstanceHourlyPrice(rc) {
				pricePerHour = *rc.Amount
				break
			}
		}
	}

	// If we're still unable to resolve hourly price, try fixed -> hourly
	if pricePerHour == 0 {
		if ri.Duration != nil && ri.FixedPrice != nil {
			var durHours float64
			durSeconds := float64(*ri.Duration)
			fixedPrice := float64(*ri.FixedPrice)
			if durSeconds != 0 && fixedPrice != 0 {
				durHours = durSeconds / 60 / 60
				pricePerHour = fixedPrice / durHours
			}
		}
	}

	if pricePerHour == 0 {
		return 0, fmt.Errorf("Failed to resolve an hourly price from FixedPrice or Recurring Costs")
	}

	return pricePerHour, nil
}

func getRegionReservedInstances(region string) ([]*AWSReservedInstance, error) {
	c := &aws.Config{
		Region: aws.String(region),
	}
	s := session.Must(session.NewSession(c))
	svc := ec2.New(s)

	response, err := svc.DescribeReservedInstances(&ec2.DescribeReservedInstancesInput{})
	if err != nil {
		return nil, err
	}

	var reservedInstances []*AWSReservedInstance
	for _, ri := range response.ReservedInstances {
		var zone string
		if ri.AvailabilityZone != nil {
			zone = *ri.AvailabilityZone
		}
		pricePerHour, err := getReservedInstancePrice(ri)
		if err != nil {
			klog.V(1).Infof("Error Resolving Price: %s", err.Error())
			continue
		}
		reservedInstances = append(reservedInstances, &AWSReservedInstance{
			Zone:           zone,
			Region:         region,
			InstanceType:   *ri.InstanceType,
			InstanceCount:  *ri.InstanceCount,
			InstanceTenacy: *ri.InstanceTenancy,
			StartDate:      *ri.Start,
			EndDate:        *ri.End,
			PricePerHour:   pricePerHour,
		})
	}

	return reservedInstances, nil
}

func (a *AWS) getReservedInstances() ([]*AWSReservedInstance, error) {
	err := a.configureAWSAuth()
	if err != nil {
		return nil, fmt.Errorf("Error Configuring aws auth: %s", err.Error())
	}

	var reservedInstances []*AWSReservedInstance

	nodes := a.Clientset.GetAllNodes()
	regionsSeen := make(map[string]bool)
	for _, node := range nodes {
		region, ok := node.Labels[v1.LabelZoneRegion]
		if !ok {
			continue
		}
		if regionsSeen[region] {
			continue
		}

		ris, err := getRegionReservedInstances(region)
		if err != nil {
			klog.V(3).Infof("Error getting reserved instances: %s", err.Error())
			continue
		}
		regionsSeen[region] = true
		reservedInstances = append(reservedInstances, ris...)
	}

	return reservedInstances, nil
}