Horizon

Disable “Consistency Groups” and “Consistency Group Snapshots” dashboards

The two dashboards Consistency Groups and Consistency Group Snapshots are unfortunately always activated in Horizon and there is no configuration parameter to deactivate them. Therefore only the deactivation by manual removal of files within the Horizon containers works at the moment.

$ docker exec -it horizon bash
(horizon)[root@20-10 /]# find /var/lib/kolla \
  -name '_1340_project_consistency_groups_panel.py*' \
  -exec rm -f {} \;
(horizon)[root@20-10 /]# find /var/lib/kolla \
  -name '_1350_project_cg_snapshots_panel.py*' \
  -exec rm -f {} \;

$ docker restart horizon

Horizon webinterface broken

Description

../_images/horizon-broken.png

Solution

You have to cleanup and restart all horizon containers.

  • Up to Queens release:

    $ docker exec -it horizon rm /var/lib/kolla/.local_settings.md5sum.txt && docker restart horizon

  • As of Rocky release

    $ docker exec -it horizon rm /var/lib/kolla/.settings.md5sum.txt && docker restart horizon

Large Horizon table for django_session

  • table django_session size in database horizon is large

    $ ls -lah /var/lib/docker/volumes/mariadb/_data/horizon/
total 3.5G
...
-rw-rw----  1 42434 42434 1.6K Sep 10 12:07 django_session.frm
-rw-rw----  1 42434 42434 3.5G Dec  5 14:53 django_session.ibd
...

  • cleanup the sessions in horizon container

    $ docker exec -it horizon manage.py clearsessions

  • optimize the table size

    $ docker exec -it mariadb mysqlcheck -u root -p --optimize --skip-write-binlog horizon django_session
Enter password:
horizon.django_session
note     : Table does not support optimize, doing recreate + analyze instead
status   : OK

  • table django_session size in database horizon

    $ sudo ls -lah /var/lib/docker/volumes/mariadb/_data/horizon/
...
-rw-rw----  1 42434 42434 1.6K Dec  5 15:02 django_session.frm
-rw-rw----  1 42434 42434 9.0M Dec  5 15:04 django_session.ibd
...