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api.go
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api.go
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package retriever
import (
"context"
"fmt"
"time"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/config"
"github.com/aws/aws-sdk-go-v2/credentials"
"github.com/aws/aws-sdk-go-v2/service/ec2"
"github.com/aws/aws-sdk-go-v2/service/ec2/types"
"github.com/prometheus/client_golang/prometheus"
"github.com/sirupsen/logrus"
ceConfig "github.com/rebuy-de/cost-exporter/pkg/config"
"github.com/rebuy-de/cost-exporter/pkg/prom"
)
type APIRetriever struct {
Accounts []ceConfig.Account
IntervalSec int64
Services []Service
}
type Service struct {
Region string
svc *ec2.Client
Account string
}
func (c *APIRetriever) Run(ctx context.Context) {
c.initialize(ctx)
c.getCores(ctx)
c.getSpotInstances(ctx)
go c.scheduleInterval(ctx)
}
func getAvailableRegions(ctx context.Context, credProvider credentials.StaticCredentialsProvider) []types.Region {
conf, err := config.LoadDefaultConfig(ctx,
config.WithCredentialsProvider(credProvider),
config.WithRegion("eu-west-1"),
)
if err != nil {
fmt.Println(err)
}
svc := ec2.NewFromConfig(conf)
regions, err := svc.DescribeRegions(ctx, &ec2.DescribeRegionsInput{AllRegions: aws.Bool(false)})
if err != nil {
fmt.Println(err)
}
return regions.Regions
}
func (c *APIRetriever) initialize(ctx context.Context) {
for _, account := range c.Accounts {
credProvider := credentials.NewStaticCredentialsProvider(account.ID, account.Secret, "")
regions := getAvailableRegions(ctx, credProvider)
for _, region := range regions {
conf, err := config.LoadDefaultConfig(ctx,
config.WithCredentialsProvider(credProvider),
config.WithRegion(*region.RegionName),
)
if err != nil {
fmt.Println(err)
}
svc := ec2.NewFromConfig(conf)
c.Services = append(c.Services, Service{
Region: *region.RegionName,
svc: svc,
Account: account.Name,
})
}
}
}
func (c *APIRetriever) scheduleInterval(ctx context.Context) {
for range time.Tick(time.Duration(c.IntervalSec) * time.Second) {
c.getCores(ctx)
c.getSpotInstances(ctx)
}
}
func (c *APIRetriever) getCores(ctx context.Context) {
for _, service := range c.Services {
logrus.Infof("Getting cores for account '%s' and region '%s'", service.Account, service.Region)
var totalCoreCount int32
params := &ec2.DescribeInstancesInput{
MaxResults: aws.Int32(100),
}
for {
resp2, err := service.svc.DescribeInstances(ctx, params)
if err != nil {
fmt.Println(err)
continue
}
for _, reservation := range resp2.Reservations {
for _, instance := range reservation.Instances {
if instance.State.Name == types.InstanceStateNameRunning {
totalCoreCount += *instance.CpuOptions.CoreCount * *instance.CpuOptions.ThreadsPerCore
}
}
}
if resp2.NextToken == nil {
break
}
params.NextToken = resp2.NextToken
}
prom.C.SetTotalCoreCount(service.Account, service.Region, float64(totalCoreCount))
}
}
func (c *APIRetriever) getSpotInstances(ctx context.Context) {
spotRequestItems := []prometheus.Labels{}
for _, service := range c.Services {
logrus.Infof("Getting SpotInstances for account '%s' and region '%s'", service.Account, service.Region)
resp, err := service.svc.DescribeSpotInstanceRequests(ctx, &ec2.DescribeSpotInstanceRequestsInput{})
if err != nil {
fmt.Println(err)
continue
}
for _, request := range resp.SpotInstanceRequests {
var instanceID string
if request.InstanceId == nil {
instanceID = ""
} else {
instanceID = *request.InstanceId
}
var launchedAvailabilityZone string
if request.LaunchedAvailabilityZone == nil {
launchedAvailabilityZone = ""
} else {
launchedAvailabilityZone = *request.LaunchedAvailabilityZone
}
labels := prometheus.Labels{
"account": service.Account,
"region": service.Region,
"state": string(request.State),
"code": *request.Status.Code,
"instance_type": string(request.LaunchSpecification.InstanceType),
"instance_id": instanceID,
"availability_zone": launchedAvailabilityZone,
}
spotRequestItems = append(spotRequestItems, labels)
}
}
prom.C.SetSpotRequest(spotRequestItems)
}