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Add IAM Auth support #326

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Add IAM Auth support #326

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48f42dd
Add IAM Auth support
bvalente Oct 17, 2025
2ebc652
Merge branch 'main' into percona-iam
JiriCtvrtka Aug 19, 2026
4c9d05c
Cover AWS IAM auth and remaining config paths with tests.
JiriCtvrtka Aug 20, 2026
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21 changes: 21 additions & 0 deletions config/config.go
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,7 @@
package config

import (
"context"
"crypto/tls"
"crypto/x509"
"fmt"
Expand All @@ -24,6 +25,8 @@ import (
"strings"
"sync"

awsConfig "github.com/aws/aws-sdk-go-v2/config"
rdsAuth "github.com/aws/aws-sdk-go-v2/feature/rds/auth"
"github.com/go-sql-driver/mysql"
"github.com/prometheus/client_golang/prometheus"

Expand Down Expand Up @@ -73,6 +76,8 @@ type MySqlConfig struct {
TlsInsecureSkipVerify bool `ini:"ssl-skip-verfication"` //nolint:misspell
Tls string `ini:"tls"`
EnableCleartextPlugin bool `ini:"enable-cleartext-plugin"`
AwsIamAuth bool `ini:"aws-iam-auth"`
AwsRegion string `ini:"aws-region"`
}

type MySqlConfigHandler struct {
Expand Down Expand Up @@ -209,6 +214,22 @@ func (m MySqlConfig) FormDSN(target string) (string, error) {
config.TLSConfig = "custom"
}
}
if m.AwsIamAuth {
if m.AwsRegion == "" {
return "", fmt.Errorf("aws region must be specified for IAM authentication")
}
awsCfg, err := awsConfig.LoadDefaultConfig(context.TODO())
if err != nil {
return "", fmt.Errorf("failed to load AWS config for IAM authentication: %w", err)
}
authToken, err := rdsAuth.BuildAuthToken(
context.TODO(), config.Addr, m.AwsRegion, m.User, awsCfg.Credentials)
if err != nil {
return "", fmt.Errorf("failed to build auth token for IAM authentication: %w", err)
}
config.Passwd = authToken
}

if m.EnableCleartextPlugin {
config.AllowCleartextPasswords = true
}
Expand Down
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