Editing a cluster

Edit cluster details such as the configuration profile associated with a cluster and run a job to update a cluster.

Edit cluster details such as the configuration profile associated with a cluster and run an install or config job to update a cluster.
Note: Upgrade jobs are only applicable at the datacenter or node levels.
If authentication is enabled in the config profile associated with a cluster, prompts recommend changing the default password of the cassandra user. After selecting a configuration profile that includes cassandra.yaml settings to enable the Internal or password authentication scheme, the Add or Edit Cluster dialog prompts for old and new passwords for the built-in cql user named cassandra. The cassandra user is present by default in the Internal authentication scheme, and has a publicly known default password of cassandra. LCM changes the default cassandra password using the supplied password fields.
Warning: It is a security risk to leave the default cassandra password in place. Change the default password to prevent unauthorized access and avoid security breaches.

Procedure

  1. Click Clusters from the Lifecycle Manager navigation menu.
  2. Select the cluster to edit in the Clusters pane and choose Edit from the Clusters pane menu.
    The Edit Cluster cluster name dialog appears.

    If the cluster name has an alias, the Display Name appears as a read-only field above the Cluster Name. To edit or remove the alias, see Changing the display name of a cluster.

    Read-only cluster display name

    If the cluster does not currently have a config profile selected, an inline instruction prompts you to select one so that LCM can determine the authentication protocol and prompt for credentials upfront if necessary.
    Note: If authentication is not enabled within the selected configuration profile, there are no prompts for credentials. See authentication schemes supported in LCM for more details.
    Warning: If authentication is enabled and a job is going to be run, the required credentials must be set prior to running the job. Not doing so causes LCM to fail registering the cluster automatically with OpsCenter monitoring. Set the credentials upfront within the Add or Edit Cluster dialogs in the LCM UI, or set old and new passwords using the LCM API.
  3. Make any changes, such as selecting a new Config Profile to associate with the cluster.
    If prompted, enter the appropriate credentials for internal authentication. Enter the Old Password, New Password, and Confirm Password for the cassandra user if internal authentication is enabled as the default scheme (default).

    Change password for cassandra user in the Edit Cluster dialog

    For an initial install, set the Old Password to cassandra. Click the tooltip icon for more information:

    Tooltip that explains changing the default cassandra password for better security

    Internal or Password authentication is enabled. The authentication scheme includes a default user with the username 'cassandra' and a publicly known default password 'cassandra'. Change the default password to prevent security breaches. To change the default password, or your existing password (if you have already changed it from the default 'cassandra'), enter the current password in Old Password field and the desired password in New Password field. LCM ensures that DSE can be accessed with the new password. You can change the password for the cassandra user at any time through the use of this dialog.

    If a password has already been set but needs to be changed, click Change for the Old and New Passwords. Enter the old password and new passwords to update them.

    Password already set fields of Edit Cluster dialog

    Click the remove stored password link to explicitly remove stored credentials. After clicking Save, the credential is queued for removal. The LCM API no longer returns old-password: true. The LCM API does not return stored passwords for obvious security reasons. Retaining or removing the stored password is at the discretion of your organization.

    Remove stored password fields of Edit Cluster dialog

  4. Click Save.

What's next

Depending on the edit, run an install or configure job at the cluster level.
Note: Upgrade jobs are only applicable at the datacenter or node levels.