policy does not allow to see consistencygroup, but horizon has consistencygroup tab by default

[Nobuto Murata]

With Mitaka. When opening "Volume consistency groups" with the following URL in dashboard, it gives an error as "Error: Unable to retrieve volume consistency groups."
http://<dashboard_vip>/project/volumes/?tab=volumes_and_snapshots__cgroups_tab

/var/log/apache2/error.log
[Wed Apr 19 12:45:56.936280 2017] [wsgi:error] [pid 48241:tid 140295558567680] Recoverable error: Policy doesn't allow consistencygroup:get_all to be performed. (HTTP 403) (Request-ID: req-2eaacdc2-25c6-43ce-b4de-f0fafcac3ceb)

According to the /etc/cinder/policy.json, no one allows to see consistencygroup. It would be nice if the charm allows to modify policy.json to enable the "volume consistency groups" feature: https://docs.openstack.org/admin-guide/blockstorage-consistency-groups.html

    "consistencygroup:create" : "group:nobody",
    "consistencygroup:delete": "group:nobody",
    "consistencygroup:update": "group:nobody",
    "consistencygroup:get": "group:nobody",
    "consistencygroup:get_all": "group:nobody",

    "consistencygroup:create_cgsnapshot" : "group:nobody",
    "consistencygroup:delete_cgsnapshot": "group:nobody",
    "consistencygroup:get_cgsnapshot": "group:nobody",
    "consistencygroup:get_all_cgsnapshots": "group:nobody",

[James Page (james-page)]

Rather than add yet-another-config-toggle to the openstack dashboard charm, I'd prefer to deal with this via the service-discovery spec we have in-flight for the queens development cycle; cinder can use this feature to expose whether consistency-groups are supported to any service in the cloud, including the dashboard, which can then enable/disable features accordingly.

[James Page (james-page)]

Triaging cinder task as 'wishlist' as enabling consistency group support for cinder is a new feature; Triaging openstack-dashboard task as 'Medium' as we really should conditionally enable/disable this part of the dashboard.

[Edward Hope-Morley (hopem)]

Openstack dashboard charm patch - https://review.openstack.org/#/c/644419

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/644419
Committed: https://git.openstack.org/cgit/openstack/charm-openstack-dashboard/commit/?id=ca21ac81164a7a1d371111f501a6a0c79c637f67
Submitter: Zuul
Branch: master

commit ca21ac81164a7a1d371111f501a6a0c79c637f67
Author: tpsilva <email address hidden>
Date: Mon Mar 18 17:10:47 2019 -0300

    Add option to hide/show consistency groups tab

    Cinder by default does not enable Consistency Groups, but Horizon always
    show its tabs and there is not an option to hide them. This patch adds a
    config option to change the policy file to hide or show those tabs.

    Change-Id: Ia2fb52650201524acbb8d6aafe37e7c0ea26e99e
    Closes-bug: #1684113

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/18.11
Review: https://review.openstack.org/648233