Quickie to see spot instance types in an AWS Region

list_spot_instances.go

package main

import (
	"fmt"
	"log"
	"time"

	"github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/aws/session"
	"github.com/aws/aws-sdk-go/service/ec2"
)

func main() {
	sess, err := session.NewSession()
	apne2 := sess.Copy(&aws.Config{Region: aws.String("ap-northeast-2")})

	use1Svc := ec2.New(sess)
	seoulSvc := ec2.New(apne2)

	use1Insts := map[string]bool{}
	seoulInsts := map[string]bool{}

	startTime := time.Now().AddDate(0, 0, -2)
	params := &ec2.DescribeSpotPriceHistoryInput{
		StartTime: &startTime,
	}
	out, err := seoulSvc.DescribeSpotPriceHistory(params)
	if err != nil {
		log.Fatal(err)
	}

	for _, spot := range out.SpotPriceHistory {
		seoulInsts[*spot.InstanceType] = true
	}
	out, err = use1Svc.DescribeSpotPriceHistory(params)
	if err != nil {
		log.Fatal(err)
	}

	for _, spot := range out.SpotPriceHistory {
		use1Insts[*spot.InstanceType] = true
	}

	fmt.Printf("%d: %#v\n", len(seoulInsts), seoulInsts)
	fmt.Printf("%d: %#v\n", len(use1Insts), use1Insts)

}