Comment 2 for bug 1782717

See line 5 in https://pastebin.com/50qfZexx

You can also (manually) modify contents of your /etc/kolla/horizon directory to insert this modified file into the container. (Of course this breaks the automation which is kolla's main point, but I'm assuming this bug will be fixed quickly and this workaround will only be necessary for a short time).

root@tell01:/etc/kolla/horizon# diff config.json config.json.old
16,21d15
< },
< {
< "source": "/var/lib/kolla/config_files/kolla_extend_start.modified",
< "dest": "/usr/local/bin/kolla_extend_start",
< "owner": "horizon",
< "perm": "0744"
root@tell01:/home/ubuntu/kolla/horizon#