irsa_app_1.go

// Session creation
sess := session.Must(session.NewSession())

// Create a new STS client to get temporary credentials
initStsClient := sts.New(sess)

// Get the SA token
awsWebIdentityTokenFile := os.Getenv("AWS_WEB_IDENTITY_TOKEN_FILE")

awsWebIdentityToken, err := ioutil.ReadFile(awsWebIdentityTokenFile)
if err != nil {
  panic(err)
}

// Get the IAM role ARN
awsRoleArn := os.Getenv("AWS_ROLE_ARN")