Unable to migrate instance between encrypted CNs

[blackwood821]

[root@headnode (us-west-agc) ~]# sdc-migrate migrate -n 44454c4c-5100-1059-8057-b9c04f4e5832 3d583590-c8ff-cd0d-e0b4-c3e439208fe6
# Migration begin running in job 93270a0c-4700-436c-84d0-493b70fe0ed1
 - reserving instance
 - syncing data
Failure: failed to sync migration instance - Error - Error: sync error: zfs snapshot error: Command failed: /usr/sbin/zfs send --parsable --dryrun --replicate zones/3d583590-c8ff-cd0d-e0b4-c3e439208fe6@vm-migration-1

Here is what I see on the source CN:

[root@cn04 (us-west-agc) /opt]# zfs list -t all -r zones/3d583590-c8ff-cd0d-e0b4-c3e439208fe6
NAME                                                             USED  AVAIL     REFER  MOUNTPOINT
zones/3d583590-c8ff-cd0d-e0b4-c3e439208fe6                       416M  99.6G     64.9M  /zones/3d583590-c8ff-cd0d-e0b4-c3e439208fe6
zones/3d583590-c8ff-cd0d-e0b4-c3e439208fe6@vm-migration-1           0      -     64.9M  -
zones/3d583590-c8ff-cd0d-e0b4-c3e439208fe6/data                  397M  99.6G      397M  /zones/3d583590-c8ff-cd0d-e0b4-c3e439208fe6/data
zones/3d583590-c8ff-cd0d-e0b4-c3e439208fe6/data@vm-migration-1      0      -      397M  -

And here is the underlying error:

[root@cn04 (us-west-agc) /opt]# /usr/sbin/zfs send --parsable --dryrun --replicate zones/3d583590-c8ff-cd0d-e0b4-c3e439208fe6@vm-migration-1 > [email protected]
cannot send zones/3d583590-c8ff-cd0d-e0b4-c3e439208fe6@vm-migration-1: encrypted dataset zones/3d583590-c8ff-cd0d-e0b4-c3e439208fe6 may not be sent with properties without the raw flag

Code of interest may be https://github.com/TritonDataCenter/sdc-cn-agent/blob/master/lib/backends/smartos/bin/machine-migrate-send.js#L945

[blackwood821]

It appears this has been an issue for over 2 years and possibly ever since the beginning so it's nothing new:
TritonDataCenter/sdc-cn-agent#37 (comment)