snap updated automatically from 3.16 to 3.17, resulting in:
lxc start lxc5576-3558
Error: Failed to run: /snap/lxd/current/bin/lxd forkstart lxc5576-3558 /var/snap/lxd/common/lxd/containers /var/snap/lxd/common/lxd/logs/lxc5576-3558/lxc.conf: Try `lxc info --show-log lxc5576-3558` for more info
lxc info --show-log lxc5576-3558
lxc lxc5576-3558 20190917153349.771 ERROR dir - storage/dir.c:dir_mount:198 - No such file or directory - Failed to mount "/var/snap/lxd/common/lxd/containers/lxc5576-3558/rootfs" on "/var/snap/lxd/common/lxc/" lxc lxc5576-3558 20190917153349.771 ERROR conf - conf.c:lxc_mount_rootfs:1353 - Failed to mount rootfs "/var/snap/lxd/common/lxd/containers/lxc5576-3558/rootfs" onto "/var/snap/lxd/common/lxc/" with options "(null)" lxc lxc5576-3558 20190917153349.771 ERROR conf - conf.c:lxc_setup_rootfs_prepare_root:3447 - Failed to setup rootfs for lxc lxc5576-3558 20190917153349.771 ERROR conf - conf.c:lxc_setup:3550 - Failed to setup rootfs lxc lxc5576-3558 20190917153349.771 ERROR start - start.c:do_start:1321 - Failed to setup container "lxc5576-3558"
an lxd revert to 3.16 worked, but:
lxd Error: failed to open cluster database: failed to ensure schema: schema version '17' is more recent than expected '14'
refreshing back to 3.17 let at least start the lxd daemon, but the container can not be started with the warning above.