101 lines
3.2 KiB
Go
101 lines
3.2 KiB
Go
package mtdaws
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import (
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"context"
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"fmt"
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"os"
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"github.com/aws/aws-sdk-go-v2/aws"
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"github.com/aws/aws-sdk-go-v2/config"
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"github.com/aws/aws-sdk-go-v2/service/ec2"
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"github.com/aws/aws-sdk-go-v2/service/ec2/types"
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"github.com/thefeli73/polemos/state"
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)
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// AwsInstance is basic info about a single aws instance (instance id, redion, pubIP and privIP)
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type AwsInstance struct {
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InstanceID string
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Region string
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PublicIP string
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PrivateIP string
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}
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// NewConfig creates a AWS config for a specific region
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func NewConfig(region string, credentials string) aws.Config {
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cfg, err := config.LoadDefaultConfig(context.TODO(), config.WithSharedConfigFiles([]string{credentials}), config.WithRegion(region))
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if err != nil {
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fmt.Println("Error creating config:", err)
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fmt.Println("Configure Credentials in line with the documentation found here: https://aws.github.io/aws-sdk-go-v2/docs/configuring-sdk/#specifying-credentials")
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os.Exit(1)
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}
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return cfg
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}
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// GetCloudID returns a string to find the instance based on information from aws
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func GetCloudID(instance AwsInstance) string {
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return "aws_" + instance.Region + "_" + instance.InstanceID
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}
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// GetInstances scans all configured regions for instances and add them to services
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func GetInstances(config state.Config) []AwsInstance {
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awsInstances := []AwsInstance{}
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for _, region := range config.AWS.Regions {
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awsConfig := NewConfig(region, config.AWS.CredentialsPath)
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instances, err := Instances(awsConfig)
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if err != nil {
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fmt.Println("Error listing instances:", err)
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continue
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}
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for _, instance := range instances {
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var publicAddr string
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if instance.PublicIpAddress != nil {
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publicAddr = aws.ToString(instance.PublicIpAddress)
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}
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awsInstances = append(awsInstances, AwsInstance{
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InstanceID: aws.ToString(instance.InstanceId),
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Region: region,
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PublicIP: publicAddr,
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PrivateIP: aws.ToString(instance.PrivateIpAddress)})
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}
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}
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return awsInstances
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}
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// PrintInstanceInfo prints info about a specific instance in a region
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func PrintInstanceInfo(instance *types.Instance) {
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fmt.Println("\tInstance ID:", aws.ToString(instance.InstanceId))
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fmt.Println("\t\tInstance DNS name:", aws.ToString(instance.PublicDnsName))
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fmt.Println("\t\tInstance Type:", string(instance.InstanceType))
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fmt.Println("\t\tAMI ID:", aws.ToString(instance.ImageId))
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fmt.Println("\t\tState:", string(instance.State.Name))
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fmt.Println("\t\tAvailability Zone:", aws.ToString(instance.Placement.AvailabilityZone))
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if instance.PublicIpAddress != nil {
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fmt.Println("\t\tPublic IP Address:", aws.ToString(instance.PublicIpAddress))
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}
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fmt.Println("\t\tPrivate IP Address:", aws.ToString(instance.PrivateIpAddress))
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}
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// Instances returns all instances for a config i.e. a region
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func Instances(config aws.Config) ([]types.Instance, error) {
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svc := ec2.NewFromConfig(config)
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input := &ec2.DescribeInstancesInput{}
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var instances []types.Instance
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paginator := ec2.NewDescribeInstancesPaginator(svc, input)
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for paginator.HasMorePages() {
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page, err := paginator.NextPage(context.TODO())
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if err != nil {
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return nil, err
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}
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for _, reservation := range page.Reservations {
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for _, instance := range reservation.Instances {
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instances = append(instances, instance)
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}
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}
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}
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return instances, nil
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}
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