How to modify the management account password

[jiuker]

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If I modify the configuration items in the CR file, the mq instance can restart normally, but the modified account and password cannot log in to the management control page.

[ChunyiLyu]

@jiuker I'm going to convert this issue to a discussion since this is a question.

[ChunyiLyu]

For user management in RMQ in k8s, we generally recommend using the Messaging Topology Operator and create users.rabbitmq.com objects: https://github.com/rabbitmq/messaging-topology-operator/blob/main/docs/examples/users/userPreDefinedCreds.yaml

You can also import definitions if that fits your use case: https://github.com/rabbitmq/cluster-operator/tree/main/docs/examples/import-https-url-definition

If you have to set credentials for the default user, you can create a default user secret first with the expected username and password before you create the rabbitmqcluster. For example, if your rabbitmqcluster name is sample, you can create a secret, in the same namespace called sample-default-user:

apiVersion: v1
kind: Secret
metadata:
  name: sample-default-user
type: Opaque
stringData:
  username: guest-user
  password: guest-pass
  default_user.conf: |
    default_user = guest-user
    default_pass = guest-pass

Then you can create the rabbitmqcluster. There is no need to set the username&password in the rmq manifest with this approach.