Use aws-sdk-go-v2/config to load AWS config

Replace the hand-rolled credential chain (static, ECS endpoint, EC2
role) with config.LoadDefaultConfig, which handles the full standard
AWS credential resolution chain automatically.

Co-authored-by: Neil McGibbon <code@neilmcgibbon.com>
Signed-off-by: Bryan Frimin <bryan@getprobo.com>

go.mod

@@ -7,8 +7,8 @@ require (
 	github.com/99designs/gqlgen v0.17.90
 	github.com/anthropics/anthropic-sdk-go v1.45.0
 	github.com/aws/aws-sdk-go-v2 v1.41.7
+	github.com/aws/aws-sdk-go-v2/config v1.32.14
 	github.com/aws/aws-sdk-go-v2/credentials v1.19.17
-	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.23
 	github.com/aws/aws-sdk-go-v2/service/bedrockruntime v1.52.0
 	github.com/aws/aws-sdk-go-v2/service/s3 v1.101.0
 	github.com/brianvoe/gofakeit/v7 v7.15.0
@@ -57,6 +57,12 @@ require (
 	github.com/ProtonMail/go-crypto v1.4.1 // indirect
 	github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 // indirect
 	github.com/atotto/clipboard v0.1.4 // indirect
+	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.23 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/ini v1.8.6 // indirect
+	github.com/aws/aws-sdk-go-v2/service/signin v1.0.11 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sso v1.30.17 // indirect
+	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.36.0 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sts v1.42.1 // indirect
 	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
 	github.com/aymerick/douceur v0.2.0 // indirect
 	github.com/bahlo/generic-list-go v0.2.0 // indirect

pkg/awsconfig/config.go

@@ -16,16 +16,12 @@ package awsconfig
 
 import (
 	"context"
+	"fmt"
 	"net/http"
-	"net/url"
-	"os"
-	"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/credentials/ec2rolecreds"
-	"github.com/aws/aws-sdk-go-v2/credentials/endpointcreds"
-	"github.com/aws/aws-sdk-go-v2/feature/ec2/imds"
 	"go.gearno.de/kit/httpclient"
 	"go.gearno.de/kit/log"
 )
@@ -45,15 +41,11 @@ const (
 	DefaultSessionName = "go.probo.inc/probo"
 )
 
-func NewConfig(logger *log.Logger, httpClient *http.Client, opts Options) aws.Config {
+func NewConfig(logger *log.Logger, httpClient *http.Client, opts Options) (aws.Config, error) {
 	if opts.Region == "" {
 		opts.Region = DefaultRegion
 	}
 
-	if opts.SessionName == "" {
-		opts.SessionName = ""
-	}
-
 	logger = logger.Named(
 		"aws.client",
 		log.WithAttributes(
@@ -67,52 +59,29 @@ func NewConfig(logger *log.Logger, httpClient *http.Client, opts Options) aws.Co
 		httpClient = httpclient.DefaultPooledClient(httpclient.WithLogger(logger))
 	}
 
-	cfg := aws.NewConfig()
-	cfg.HTTPClient = httpClient
-	cfg.Region = opts.Region
-	// cfg.Logger = logger TODO: add logger interface for aws
+	loadOpts := []func(*config.LoadOptions) error{
+		config.WithRegion(opts.Region),
+		config.WithHTTPClient(httpClient),
+	}
 
 	if opts.AccessKeyID != "" && opts.SecretAccessKey != "" {
-		// Use static credentials if provided
-		cfg.Credentials = credentials.NewStaticCredentialsProvider(
-			opts.AccessKeyID,
-			opts.SecretAccessKey,
-			opts.SessionName,
-		)
-	} else {
-		imdsClient := imds.New(imds.Options{HTTPClient: httpClient})
+		loadOpts = append(loadOpts, config.WithCredentialsProvider(
+			credentials.NewStaticCredentialsProvider(
+				opts.AccessKeyID,
+				opts.SecretAccessKey,
+				opts.SessionName,
+			),
+		))
+	}
 
-		ec2Provider := ec2rolecreds.New(func(options *ec2rolecreds.Options) {
-			options.Client = imdsClient
-		})
-
-		ecsCredentialsURI := os.Getenv("AWS_CONTAINER_CREDENTIALS_RELATIVE_URI")
-		ecsEndpoint, _ := url.JoinPath("http://169.254.170.2", ecsCredentialsURI)
-		ecsProvider := endpointcreds.New(
-			ecsEndpoint,
-			func(options *endpointcreds.Options) {
-				options.HTTPClient = httpClient
-			},
-		)
-
-		cfg.Credentials = aws.NewCredentialsCache(
-			aws.CredentialsProviderFunc(func(ctx context.Context) (aws.Credentials, error) {
-				creds, err := ecsProvider.Retrieve(ctx)
-				if err == nil {
-					return creds, nil
-				}
-
-				return ec2Provider.Retrieve(ctx)
-			}),
-			func(o *aws.CredentialsCacheOptions) {
-				o.ExpiryWindow = 10 * time.Minute
-			},
-		)
+	cfg, err := config.LoadDefaultConfig(context.Background(), loadOpts...)
+	if err != nil {
+		return aws.Config{}, fmt.Errorf("cannot load AWS config: %w", err)
 	}
 
 	if opts.Endpoint != "" {
 		cfg.BaseEndpoint = new(opts.Endpoint)
 	}
 
-	return cfg.Copy()
+	return cfg, nil
 }

pkg/probod/probod.go

@@ -245,7 +245,7 @@ func (impl *Implm) Run(
 		return fmt.Errorf("cannot get cookie secret bytes: %w", err)
 	}
 
-	awsConfig := awsconfig.NewConfig(
+	awsConfig, err := awsconfig.NewConfig(
 		l,
 		httpclient.DefaultPooledClient(
 			httpclient.WithLogger(l),
@@ -259,6 +259,9 @@ func (impl *Implm) Run(
 			Endpoint:        impl.cfg.AWS.Endpoint,
 		},
 	)
+	if err != nil {
+		return fmt.Errorf("cannot initialize AWS config: %w", err)
+	}
 
 	html2pdfConverter := html2pdf.NewConverter(
 		impl.cfg.ChromeDPAddr,