AWS SDK V2 test

main.go

package main

import (
	"context"
	"errors"
	"fmt"

	"github.com/aws/aws-sdk-go-v2/aws"
	"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/aws/smithy-go"
)

func DescribeSecurityGroups(client *ec2.Client) {
	resp, err := client.DescribeSecurityGroups(context.TODO(),
		&ec2.DescribeSecurityGroupsInput{})

	if err != nil {
		panic(err)
	}

	fmt.Println("security groups:")
	for _, sg := range resp.SecurityGroups {
		fmt.Printf("%s %s %s\n", *sg.GroupId, *sg.GroupName, *sg.Description)
	}
}

// pagination, unfortunately AWS always return in random order
func DescribeInstanceTypes(client *ec2.Client, nextToken string) string {
	input := &ec2.DescribeInstanceTypesInput{}
	if len(nextToken) > 0 {
		input.NextToken = aws.String(nextToken)
	}
	input.MaxResults = aws.Int32(5)
	resp, err := client.DescribeInstanceTypes(context.TODO(), input)
	if err != nil {
		panic(err)
	}

	fmt.Println("\ninstance types:")
	for _, it := range resp.InstanceTypes {
		fmt.Printf("%s\n", it.InstanceType)
	}

	return *resp.NextToken
}

func CreateLaunchTemplate(client *ec2.Client) {
	image := "ami-08c308b1bb265e927"
	input := &ec2.CreateLaunchTemplateInput{}
	input.LaunchTemplateName = aws.String("test")
	input.LaunchTemplateData = &types.RequestLaunchTemplateData{}
	input.LaunchTemplateData.ImageId = &image
	_, err := client.CreateLaunchTemplate(context.TODO(), input)
	if err != nil {
		var opError *smithy.GenericAPIError
		if errors.As(err, &opError) && opError.Code == "InvalidLaunchTemplateName.AlreadyExistsException" {
			// launch template already exists, skip this
		} else {
			panic(err)
		}
	}
}

func main() {
	// TODO: invalidate
	options := ec2.Options{
		Region:      "eu-north-1",
		Credentials: aws.NewCredentialsCache(credentials.NewStaticCredentialsProvider("xxx", "xxx", "")),
	}
	client := ec2.New(options)

	DescribeSecurityGroups(client)
	CreateLaunchTemplate(client)

	first := DescribeInstanceTypes(client, "")
	second := DescribeInstanceTypes(client, first)
	DescribeInstanceTypes(client, second)
	DescribeInstanceTypes(client, first)
}