These are my observations related to oracle weblogic 12c nodemanagers.
- The nodemanager (NM) username and password are note related to the admin console (AC) and enterprise manager usernames and passwords.
- You can change the NM username and password via wlst in offline mode.
- Once changed, you need to restart NM.
- If you have a cluster, the node manager on the other nodes is not update with the new passsword. You need to copy the $DOMAIN_HOME/config/nodemanager/nm_password.properties file to the other machines in the cluster.
- If you do not want to have to supply the NM username and password in WLST scripts, you need to run the storeUserConfig command and save the config and key files in a directory called .wlst in the home folder of the user running the wlst command. You must also the nm to "true". This in an example: