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use WebIdentityRoleProvider #15

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use WebIdentityRoleProvider #15

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17 changes: 17 additions & 0 deletions awsauth.go
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@ import (
"fmt"
"log"
"os"
"strconv"
"time"

"github.com/aws/aws-sdk-go/aws"
Expand Down Expand Up @@ -267,6 +268,22 @@ func GetCredentials(c *Config) (*awsCredentials.Credentials, error) {
log.Print("[INFO] ECS container credentials detected, RemoteCredProvider added to auth chain")
}

if filePath := os.Getenv("AWS_WEB_IDENTITY_TOKEN_FILE"); len(filePath) > 0 {
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AWS_WEB_IDENTITY_TOKEN_FILE is come here.

https://aws.amazon.com/blogs/opensource/introducing-fine-grained-iam-roles-service-accounts/

Because the service account has an eks.amazonaws.com/role-arn annotation, the webhook injects the necessary environment variables (AWS_ROLE_ARN and AWS_WEB_IDENTITY_TOKEN_FILE) and sets up the aws-iam-token projected volume in the pod that the job supervises.

stsSession, err := session.NewSession(cfg)
if err != nil {
return nil, fmt.Errorf("error creating sts session: %s", err)
}
stsClient := sts.New(stsSession)

providers = append(providers, stscreds.NewWebIdentityRoleProvider(
stsClient,
os.Getenv("AWS_ROLE_ARN"),
strconv.FormatInt(time.Now().UnixNano(), 10),
filePath,
))
log.Print("[INFO] EKS IRSA credentials detected, WebIdentityRoleProvider added to auth chain")
}

if !c.SkipMetadataApiCheck {
// Real AWS should reply to a simple metadata request.
// We check it actually does to ensure something else didn't just
Expand Down