** Description changed: [ Impact ] The Open vSwitch init script `ovs-ctl` determines the system hostname and records it in the `external-ids:hostname` field of the `Open- vSwitch` table in the local OVSDB. This value may be consumed by downstream software and having it unset or set to a incorrect value could lead to erratic behavior of a system. In recent Ubuntu development we have also made it possible to configure Open vSwitch with netplan.io, which allows for a Open vSwitch controlled data path to be the only external network connection on a system. As such the current startup sequence of Open vSwitch is insufficient to allow for reliable recording of FQDN / hostname at system boot-up time. Examples of downstream issues can be viewed in bug 1896630 and bug 1912844 comment #26. [ Test Case ] 1) Use MAAS 2.9, configure a machine with Open vSwitch bridge for networking and deploy. 2) Confirm that without the change the hostname recorded in Open vSwitch is `ubuntu`. 3) Add a PPA with the updated Open vSwitch package to MAAS. 4) Re-deploy and confirm that the hostname recorded in Open vSwitch matches the FQDN as provided by MAAS. [ Regression potential ] Minimal, the update uses the exact same methods to accomplish the end result of recording the hostname as before, we have only re-ordered when the events occur to ensure successful operation. + [racb] A new service is added in packaging. Users who have overridden + existing services to change behaviour (eg. "disable all OVS-related + services") may have that configuration not have the same effect after + this update (eg. "I thought I disabled all OVS-related services but + what's this ovs-record-hostname thing now?") + [ Other Info ] A possible solution to this would be to extend the upstream `ovs-ctl` script to allow controlling when the hostname is recorded and adding a new Systemd service file to the package that calls the `record-hostname` function at a more appropriate time, i.e. after or as part of the `network-online.target`. An example of downstream issues can be viewed in bug 1896630.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1915829 Title: FQDN / hostname recorded in OVSDB is unreliable To manage notifications about this bug go to: https://bugs.launchpad.net/cloud-archive/+bug/1915829/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
