Unable to create a valid Base64 encoded Munge key

[rmarable-flaretx]

I followed the guidance outlined here to generate a custom Munge key: https://docs.aws.amazon.com/parallelcluster/latest/ug/Scheduling-v3.html#yaml-Scheduling-SlurmSettings-MungeKeySecretArn

I tried using the mungekey utility and Base64-encoding the resulting file.

$ mungekey -c -k munge-custom.key -b 1024 -f
$ base64 -w 0 munge-custom.key

However, pasting this text into the configured Secrets ARN fails to pass the validator:

{
  "configurationValidationErrors": [
    {
      "level": "ERROR",f
      "type": "MungeKeySecretSizeAndBase64Validator",
      "message": "The content of the secret arn:aws:secretsmanager:us-east-2:[redacted]:secret:pcluster-default-munge-key-YYYYYY is not a valid Base64 encoded string. Please refer to the ParallelCluster official documentation for more information."
    }
  ],
  "message": "Invalid cluster configuration."
}

I got the same results using dd and the suggested Python code. Any suggestions would be welcomed with open arms.

Required Info:

• AWS ParallelCluster version [e.g. 3.1.1]: 3.10.1

[hanwen-pcluste]

Sorry for the late reply.
Please make sure the key is stored as "Plaintext" (instead of "Key/value") in secret manager.

[rmarable-flaretx]

Hi @hanwen-pcluste - thanks for getting back to me.

The "Plaintext" field was explicitly used to save the key.

[hanwen-pcluste]

So in the plaintext, please use the value directly (e.g. W0p...), instead of using the dictionary (e.g. {"xxx":"xxx"})

[rmarable-flaretx]

Thank you, that did the trick.