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Added aws iam sasl support #468

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Added aws iam sasl support #468

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1 change: 1 addition & 0 deletions go.mod
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@ require (

require (
github.com/alecthomas/units v0.0.0-20240626203959-61d1e3462e30 // indirect
github.com/aws/aws-msk-iam-sasl-signer-go v1.0.0 // indirect
github.com/beorn7/perks v1.0.1 // indirect
github.com/cespare/xxhash/v2 v2.3.0 // indirect
github.com/davecgh/go-spew v1.1.1 // indirect
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2 changes: 2 additions & 0 deletions go.sum
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Expand Up @@ -4,6 +4,8 @@ github.com/alecthomas/kingpin/v2 v2.4.0 h1:f48lwail6p8zpO1bC4TxtqACaGqHYA22qkHjH
github.com/alecthomas/kingpin/v2 v2.4.0/go.mod h1:0gyi0zQnjuFk8xrkNKamJoyUo382HRL7ATRpFZCw6tE=
github.com/alecthomas/units v0.0.0-20240626203959-61d1e3462e30 h1:t3eaIm0rUkzbrIewtiFmMK5RXHej2XnoXNhxVsAYUfg=
github.com/alecthomas/units v0.0.0-20240626203959-61d1e3462e30/go.mod h1:fvzegU4vN3H1qMT+8wDmzjAcDONcgo2/SZ/TyfdUOFs=
github.com/aws/aws-msk-iam-sasl-signer-go v1.0.0 h1:UyjtGmO0Uwl/K+zpzPwLoXzMhcN9xmnR2nrqJoBrg3c=
github.com/aws/aws-msk-iam-sasl-signer-go v1.0.0/go.mod h1:TJAXuFs2HcMib3sN5L0gUC+Q01Qvy3DemvA55WuC+iA=
github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
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21 changes: 17 additions & 4 deletions kafka_exporter.go
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
package main

import (
"context"
"crypto/tls"
"crypto/x509"
"flag"
Expand All @@ -16,7 +17,7 @@ import (

"github.com/IBM/sarama"
kingpin "github.com/alecthomas/kingpin/v2"
"github.com/krallistic/kazoo-go"
"github.com/aws/aws-msk-iam-sasl-signer-go/signer"
"github.com/pkg/errors"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/collectors"
Expand All @@ -25,8 +26,6 @@ import (
plogflag "github.com/prometheus/common/promlog/flag"

"github.com/prometheus/common/version"
"github.com/rcrowley/go-metrics"
"k8s.io/klog/v2"
)

const (
Expand Down Expand Up @@ -89,6 +88,7 @@ type kafkaOpts struct {
saslPassword string
saslMechanism string
saslDisablePAFXFast bool
saslAwsRegion string
useTLS bool
tlsServerName string
tlsCAFile string
Expand Down Expand Up @@ -117,6 +117,15 @@ type kafkaOpts struct {
verbosityLogLevel int
}

type MSKAccessTokenProvider struct {
region string
}

func (m *MSKAccessTokenProvider) Token() (*sarama.AccessToken, error) {
token, _, err := signer.GenerateAuthToken(context.TODO(), m.region)
return &sarama.AccessToken{Token: token}, err
}

// CanReadCertAndKey returns true if the certificate and key files already exists,
// otherwise returns false. If lost one of cert and key, returns error.
func CanReadCertAndKey(certPath, keyPath string) (bool, error) {
Expand Down Expand Up @@ -188,6 +197,9 @@ func NewExporter(opts kafkaOpts, topicFilter string, topicExclude string, groupF
if opts.saslDisablePAFXFast {
config.Net.SASL.GSSAPI.DisablePAFXFAST = true
}
case "awsiam":
config.Net.SASL.Mechanism = sarama.SASLMechanism(sarama.SASLTypeOAuth)
config.Net.SASL.TokenProvider = &MSKAccessTokenProvider{region: opts.saslAwsRegion}
case "plain":
default:
return nil, fmt.Errorf(
Expand Down Expand Up @@ -749,7 +761,8 @@ func main() {
toFlagBoolVar("sasl.handshake", "Only set this to false if using a non-Kafka SASL proxy, default is true.", true, "true", &opts.useSASLHandshake)
toFlagStringVar("sasl.username", "SASL user name.", "", &opts.saslUsername)
toFlagStringVar("sasl.password", "SASL user password.", "", &opts.saslPassword)
toFlagStringVar("sasl.mechanism", "The SASL SCRAM SHA algorithm sha256 or sha512 or gssapi as mechanism", "", &opts.saslMechanism)
toFlagStringVar("sasl.aws-region", "The AWS region for IAM SASL authentication", os.Getenv("AWS_REGION"), &opts.saslAwsRegion)
toFlagStringVar("sasl.mechanism", "The SASL mechanism: gssapi, awsiam or plain or SASL SCRAM SHA algorithm: sha256 or sha512", "", &opts.saslMechanism)
toFlagStringVar("sasl.service-name", "Service name when using kerberos Auth", "", &opts.serviceName)
toFlagStringVar("sasl.kerberos-config-path", "Kerberos config path", "", &opts.kerberosConfigPath)
toFlagStringVar("sasl.realm", "Kerberos realm", "", &opts.realm)
Expand Down