Checking Ceilometer mysql database failed

fatal: [localhost]: FAILED! => {"failed": true, "msg": "the field 'args' has an invalid value, which appears to include a variable that is undefined. The error was: 'ceilomter_database_user' is undefined\n\nThe error appears to have been in '/usr/share/kolla/ansible/roles/ceilometer/tasks/bootstrap.yml': line 13, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: Checking Ceilometer mysql database\n ^ here\n"}