Hi Vasili, unfortunately there isn't enough info in the 16.04 logs to help us work out what's going on with 18.04. Do you have any way of accessing an 18.04 instance (serial console, perhaps?) that would allow you to gather more data?
Moving this back to Incomplete for now, apologies for the round trips! ** Changed in: cloud-init (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1851552 Title: since ubuntu 18 bionic release and latest, the ubuntu18 cloud image is unable to boot up on openstack instance To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1851552/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs