[root@09724c9471eb core]# keystone user-list
+----------------------------------+----------+---------+-------+
|                id                |   name   | enabled | email |
+----------------------------------+----------+---------+-------+
| 20c967e50abe4aad86a4d638255102e4 |  glance  |   True  |       |
| 65fc1249f0b841bdb7d77c893f4acf2b | keystone |   True  |       |
| 8c59b185e69642f6bfa282fcc803ecfc | neutron  |   True  |       |
| c48b0451fd8945aa9bfd041b5de3ddc5 |   nova   |   True  |       |
+----------------------------------+----------+---------+-------+
[root@09724c9471eb core]# keystone role-list
+----------------------------------+----------+
|                id                |   name   |
+----------------------------------+----------+
| 9fe2ff9ee4384b1894a90878d3e92bab | _member_ |
| 3c84e802093b4ee2ba64c94b6be3831b |  admin   |
+----------------------------------+----------+
[root@09724c9471eb core]# keystone user-role-list
+----------------------------------+-------+----------------------------------+----------------------------------+
|                id                |  name |             user_id              |            tenant_id             |
+----------------------------------+-------+----------------------------------+----------------------------------+
| 3c84e802093b4ee2ba64c94b6be3831b | admin | 65fc1249f0b841bdb7d77c893f4acf2b | c1f9cf1f77cd4426af0aaa54e7fa4246 |
+----------------------------------+-------+----------------------------------+----------------------------------+
[root@09724c9471eb core]# keystone user-role-add --user glance --role admin --tenant admin
Conflict occurred attempting to store role grant - User 20c967e50abe4aad86a4d638255102e4 already has role 3c84e802093b4ee2ba64c94b6be3831b in tenant c1f9cf1f77cd4426af0aaa54e7fa4246 (HTTP 409)