48 lines
1.5 KiB
Go
48 lines
1.5 KiB
Go
|
package config
|
||
|
|
|
||
|
|
import (
|
||
|
|
"context"
|
||
|
|
"os"
|
||
|
|
|
||
|
|
"github.com/aws/aws-sdk-go-v2/aws"
|
||
|
|
"github.com/aws/aws-sdk-go-v2/feature/ec2/imds"
|
||
|
|
)
|
||
|
|
|
||
|
|
const execEnvVar = "AWS_EXECUTION_ENV"
|
||
|
|
|
||
|
|
// DefaultsModeOptions is the set of options that are used to configure
|
||
|
|
type DefaultsModeOptions struct {
|
||
|
|
// The SDK configuration defaults mode. Defaults to legacy if not specified.
|
||
|
|
//
|
||
|
|
// Supported modes are: auto, cross-region, in-region, legacy, mobile, standard
|
||
|
|
Mode aws.DefaultsMode
|
||
|
|
|
||
|
|
// The EC2 Instance Metadata Client that should be used when performing environment
|
||
|
|
// discovery when aws.DefaultsModeAuto is set.
|
||
|
|
//
|
||
|
|
// If not specified the SDK will construct a client if the instance metadata service has not been disabled by
|
||
|
|
// the AWS_EC2_METADATA_DISABLED environment variable.
|
||
|
|
IMDSClient *imds.Client
|
||
|
|
}
|
||
|
|
|
||
|
|
func resolveDefaultsModeRuntimeEnvironment(ctx context.Context, envConfig *EnvConfig, client *imds.Client) (aws.RuntimeEnvironment, error) {
|
||
|
|
getRegionOutput, err := client.GetRegion(ctx, &imds.GetRegionInput{})
|
||
|
|
// honor context timeouts, but if we couldn't talk to IMDS don't fail runtime environment introspection.
|
||
|
|
select {
|
||
|
|
case <-ctx.Done():
|
||
|
|
return aws.RuntimeEnvironment{}, err
|
||
|
|
default:
|
||
|
|
}
|
||
|
|
|
||
|
|
var imdsRegion string
|
||
|
|
if err == nil {
|
||
|
|
imdsRegion = getRegionOutput.Region
|
||
|
|
}
|
||
|
|
|
||
|
|
return aws.RuntimeEnvironment{
|
||
|
|
EnvironmentIdentifier: aws.ExecutionEnvironmentID(os.Getenv(execEnvVar)),
|
||
|
|
Region: envConfig.Region,
|
||
|
|
EC2InstanceMetadataRegion: imdsRegion,
|
||
|
|
}, nil
|
||
|
|
}
|