Train release notes: deprecated option show_multiple_locations missing?
Hi, I'm currently evaluating our new OpenStack environment (Train), testing the usual scenarios. In the past I've had issues with nova and rbd backend, when the compute nodes used to download rbd images just to re-import them back to the ceph cluster instead of simply cloning an image. The cause was the show_multiple_locations option that was marked deprecated since Pike but in fact it's still necessary. The release notes of Pike, Queens, Rocky and Stein all mention that the workaround is still required:
The show_multiple_locations configuration option remains deprecated in this release, but it has not been removed. > (It had been scheduled for removal in the Pike release.) Please keep a watch on the Glance release notes and the > glance-specs repository to stay informed about developments on this issue.
The Train release notes don't mention this option anymore but my tests show that it's still required to avoid unnecessary rbd exports/imports. Maybe the release notes for Train should be updated to cover this issue. In case I missed any further information that already addresses this I apologize. Best regards, Eugen
On 2/27/20 5:55 AM, Eugen Block wrote:
Hi,
I'm currently evaluating our new OpenStack environment (Train), testing the usual scenarios. In the past I've had issues with nova and rbd backend, when the compute nodes used to download rbd images just to re-import them back to the ceph cluster instead of simply cloning an image.
The cause was the show_multiple_locations option that was marked deprecated since Pike but in fact it's still necessary. The release notes of Pike, Queens, Rocky and Stein all mention that the workaround is still required:
The show_multiple_locations configuration option remains deprecated in this release, but it has not been removed. > (It had been scheduled for removal in the Pike release.) Please keep a watch on the Glance release notes and the > glance-specs repository to stay informed about developments on this issue.
The Train release notes don't mention this option anymore but my tests show that it's still required to avoid unnecessary rbd exports/imports.
You are correct, the option has not been removed and the workaround is still required.
Maybe the release notes for Train should be updated to cover this issue. In case I missed any further information that already addresses this I apologize.
No, you didn't miss anything. We didn't include anything in the Train release notes because there was nothing new to report, and we didn't want to clutter up the release notes with a non-announcement. In retrospect, though, it might have been a good idea to continue the series of non-announcements.
Best regards, Eugen
Thank you for the confirmation, Brain.
No, you didn't miss anything. We didn't include anything in the Train release notes because there was nothing new to report, and we didn't want to clutter up the release notes with a non-announcement. In retrospect, though, it might have been a good idea to continue the series of non-announcements.
I entirely understand the non-cluttering approach, and if you have stumbled across this before you'll probably find the solution quickly again. On the other hand the non-announcements would at least deliver some kind of consistency. ;-) Zitat von Brian Rosmaita <rosmaita.fossdev@gmail.com>:
On 2/27/20 5:55 AM, Eugen Block wrote:
Hi,
I'm currently evaluating our new OpenStack environment (Train), testing the usual scenarios. In the past I've had issues with nova and rbd backend, when the compute nodes used to download rbd images just to re-import them back to the ceph cluster instead of simply cloning an image.
The cause was the show_multiple_locations option that was marked deprecated since Pike but in fact it's still necessary. The release notes of Pike, Queens, Rocky and Stein all mention that the workaround is still required:
The show_multiple_locations configuration option remains deprecated in this release, but it has not been removed. > (It had been scheduled for removal in the Pike release.) Please keep a watch on the Glance release notes and the > glance-specs repository to stay informed about developments on this issue.
The Train release notes don't mention this option anymore but my tests show that it's still required to avoid unnecessary rbd exports/imports.
You are correct, the option has not been removed and the workaround is still required.
Maybe the release notes for Train should be updated to cover this issue. In case I missed any further information that already addresses this I apologize.
No, you didn't miss anything. We didn't include anything in the Train release notes because there was nothing new to report, and we didn't want to clutter up the release notes with a non-announcement. In retrospect, though, it might have been a good idea to continue the series of non-announcements.
Best regards, Eugen
On 2/27/20 9:15 AM, Eugen Block wrote:
Thank you for the confirmation, Brain.
No, you didn't miss anything. We didn't include anything in the Train release notes because there was nothing new to report, and we didn't want to clutter up the release notes with a non-announcement. In retrospect, though, it might have been a good idea to continue the series of non-announcements.
I entirely understand the non-cluttering approach, and if you have stumbled across this before you'll probably find the solution quickly again. On the other hand the non-announcements would at least deliver some kind of consistency. ;-)
We discussed this at today's Glance weekly meeting and decided that your suggestion to update the Train release notes is a good one. Sorry for any confusion this caused.
Zitat von Brian Rosmaita <rosmaita.fossdev@gmail.com>:
On 2/27/20 5:55 AM, Eugen Block wrote:
Hi,
I'm currently evaluating our new OpenStack environment (Train), testing the usual scenarios. In the past I've had issues with nova and rbd backend, when the compute nodes used to download rbd images just to re-import them back to the ceph cluster instead of simply cloning an image.
The cause was the show_multiple_locations option that was marked deprecated since Pike but in fact it's still necessary. The release notes of Pike, Queens, Rocky and Stein all mention that the workaround is still required:
The show_multiple_locations configuration option remains deprecated in this release, but it has not been removed. > (It had been scheduled for removal in the Pike release.) Please keep a watch on the Glance release notes and the > glance-specs repository to stay informed about developments on this issue.
The Train release notes don't mention this option anymore but my tests show that it's still required to avoid unnecessary rbd exports/imports.
You are correct, the option has not been removed and the workaround is still required.
Maybe the release notes for Train should be updated to cover this issue. In case I missed any further information that already addresses this I apologize.
No, you didn't miss anything. We didn't include anything in the Train release notes because there was nothing new to report, and we didn't want to clutter up the release notes with a non-announcement. In retrospect, though, it might have been a good idea to continue the series of non-announcements.
Best regards, Eugen
Thanks for the update! Zitat von Brian Rosmaita <rosmaita.fossdev@gmail.com>:
On 2/27/20 9:15 AM, Eugen Block wrote:
Thank you for the confirmation, Brain.
No, you didn't miss anything. We didn't include anything in the Train release notes because there was nothing new to report, and we didn't want to clutter up the release notes with a non-announcement. In retrospect, though, it might have been a good idea to continue the series of non-announcements.
I entirely understand the non-cluttering approach, and if you have stumbled across this before you'll probably find the solution quickly again. On the other hand the non-announcements would at least deliver some kind of consistency. ;-)
We discussed this at today's Glance weekly meeting and decided that your suggestion to update the Train release notes is a good one. Sorry for any confusion this caused.
Zitat von Brian Rosmaita <rosmaita.fossdev@gmail.com>:
On 2/27/20 5:55 AM, Eugen Block wrote:
Hi,
I'm currently evaluating our new OpenStack environment (Train), testing the usual scenarios. In the past I've had issues with nova and rbd backend, when the compute nodes used to download rbd images just to re-import them back to the ceph cluster instead of simply cloning an image.
The cause was the show_multiple_locations option that was marked deprecated since Pike but in fact it's still necessary. The release notes of Pike, Queens, Rocky and Stein all mention that the workaround is still required:
The show_multiple_locations configuration option remains deprecated in this release, but it has not been removed. > (It had been scheduled for removal in the Pike release.) Please keep a watch on the Glance release notes and the > glance-specs repository to stay informed about developments on this issue.
The Train release notes don't mention this option anymore but my tests show that it's still required to avoid unnecessary rbd exports/imports.
You are correct, the option has not been removed and the workaround is still required.
Maybe the release notes for Train should be updated to cover this issue. In case I missed any further information that already addresses this I apologize.
No, you didn't miss anything. We didn't include anything in the Train release notes because there was nothing new to report, and we didn't want to clutter up the release notes with a non-announcement. In retrospect, though, it might have been a good idea to continue the series of non-announcements.
Best regards, Eugen
participants (2)
-
Brian Rosmaita
-
Eugen Block