[Bug 1917475] Re: RBAC Permissions too strict for Port_Binding table

[Camille Rodriguez]

To confirm this is the bug in /var/log/ovn/ovn-controller.log on the
hypervisors look for:.

2021-03-02T10:33:35.517Z|35359|ovsdb_idl|WARN|transaction error: {"details":"RBAC rules for client \"juju-eab186-zaza-d26c8c079cc7-11.project.serverstack\" role \"ovn-controller\" prohibit modification of table \"Port_Binding\".","error":"permission error"}
2021-03-02T10:33:35.518Z|35360|main|INFO|OVNSB commit failed, force recompute next time.

To disabel rbac, on an ovn-central unit:

# sudo ovn-sbctl find connection
_uuid               : a3b68994-4376-4506-81eb-e23d15641305
external_ids        : {}
inactivity_probe    : 60000
is_connected        : false                                                                                                                                                                                   
max_backoff         : []                                                                               
other_config        : {}                                                                               
read_only           : false                                                                            
role                : ""                                                                               
status              : {}
target              : "pssl:16642"

_uuid               : ee53c2b6-ed8b-4b21-9825-a4ecaf2bdc95
external_ids        : {}
inactivity_probe    : 60000
is_connected        : false
max_backoff         : []
other_config        : {}
read_only           : false
role                : ovn-controller
status              : {}
target              : "pssl:6642"

Look for the 6642 listeners uuid. In this case 'ee53c2b6-ed8b-
4b21-9825-a4ecaf2bdc95'

Remove the role to disable rbac:

# sudo ovn-sbctl set connection ee53c2b6-ed8b-4b21-9825-a4ecaf2bdc95
role=''

Restart the ovn-controller service on the hypervisors.

To reenable rbac:

# sudo ovn-sbctl set connection e0cef788-df18-4b1b-a238-e8b79ea51c7c
role='ovn-controller'

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https://bugs.launchpad.net/bugs/1917475

Title:
  RBAC Permissions too strict for Port_Binding table

Status in ovn package in Ubuntu:
  In Progress

Bug description:
  When using Openstack Ussuri with OVN 20.03 and adding a floating IP
  address to a unbound port the ovn-controller on the hypervisor
  repeatedly reports:

  2021-03-02T10:33:35.517Z|35359|ovsdb_idl|WARN|transaction error: {"details":"RBAC rules for client \"juju-eab186-zaza-d26c8c079cc7-11.project.serverstack\" role \"ovn-controller\" prohibit modification of table \"Port_Binding\".","error":"permission error"}
  2021-03-02T10:33:35.518Z|35360|main|INFO|OVNSB commit failed, force recompute next time.

  The seams to be because the ovn-controller needs to update the
  virtual_parent attribute of the port binding *2 but that is not
  included in the list of permissions allowed by the ovn-controller role
  *1

  *1 https://github.com/ovn-org/ovn/blob/aa8ef5588c119fa8615d78288a7db7e3df2d6fbe/northd/ovn-northd.c#L11331-L11332
  *2 https://pastebin.ubuntu.com/p/4CfcxgDgdm/

  Disabling rbac by changing the role to "" and stopping and starting
  the southbound db listener results in the port being immediately
  updated and the floating IP can be accessed.

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