Public bug reported:
## Version
Description: Ubuntu 15.04
Release: 15.04
lxc:
Installed: 1.1.2-0ubuntu3.1
Candidate: 1.1.2-0ubuntu3.1
Version table:
*** 1.1.2-0ubuntu3.1 0
500 http://us.archive.ubuntu.com/ubuntu/ vivid-updates/main amd64
Packages
500 http://security.ubuntu.com/ubuntu/ vivid-security/main amd64
Packages
100 /var/lib/dpkg/status
1.1.2-0ubuntu3 0
500 http://us.archive.ubuntu.com/ubuntu/ vivid/main amd64 Packages
## Config changes from default
>cat /etc/lxc/lxc.conf
lxc.lxcpath = /srv/vservers/lxc
## Mount details
/var/cache/lxc in on root filesystem
/srv/vservers/lxc is a btrfs mount point
## Command used (sample)
> sudo lxc-create -B btrfs --name test-bt -t ubuntu -- -r trusty
## Error (sample)
Copy /var/cache/lxc/trusty/rootfs-amd64 to /srv/vservers/lxc/test-bt/rootfs ...
Copying rootfs to /srv/vservers/lxc/test-bt/rootfs ...
Transaction commit: none (default)
Delete subvolume '/srv/vservers/lxc/test-bt/rootfs'
Create a snapshot of '/var/cache/lxc/trusty/rootfs-amd64' in
'/srv/vservers/lxc/test-bt/rootfs'
ERROR: cannot snapshot '/var/cache/lxc/trusty/rootfs-amd64' - Invalid
cross-device link
lxc_container: lxccontainer.c: create_run_template: 1108 container creation
template for test-bt failed
lxc_container: lxccontainer.c: container_destroy: 2056 Error destroying rootfs
for test-bt
lxc_container: lxc_create.c: main: 274 Error creating container test-bt
## Thoughts
Maybe this is the expected behavior, if so a Documentation update stating
something to the effect of "If you change the lxcpath to a different filesystem
than the one where /var/cache/lxc livs you cannot create a btrfs backed
container."
-or-
Let /var/cache/lxc be configured via lxc.conf and have the documentation note
that they should reside on the same filesystem.
** Affects: lxc (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1486696
Title:
lxc-create -B btrfs fails if lxc.lxcpath is not on the same filesystem
as /var/cache/lxc (not a configurable option)
Status in lxc package in Ubuntu:
New
Bug description:
## Version
Description: Ubuntu 15.04
Release: 15.04
lxc:
Installed: 1.1.2-0ubuntu3.1
Candidate: 1.1.2-0ubuntu3.1
Version table:
*** 1.1.2-0ubuntu3.1 0
500 http://us.archive.ubuntu.com/ubuntu/ vivid-updates/main amd64
Packages
500 http://security.ubuntu.com/ubuntu/ vivid-security/main amd64
Packages
100 /var/lib/dpkg/status
1.1.2-0ubuntu3 0
500 http://us.archive.ubuntu.com/ubuntu/ vivid/main amd64 Packages
## Config changes from default
>cat /etc/lxc/lxc.conf
lxc.lxcpath = /srv/vservers/lxc
## Mount details
/var/cache/lxc in on root filesystem
/srv/vservers/lxc is a btrfs mount point
## Command used (sample)
> sudo lxc-create -B btrfs --name test-bt -t ubuntu -- -r trusty
## Error (sample)
Copy /var/cache/lxc/trusty/rootfs-amd64 to /srv/vservers/lxc/test-bt/rootfs
...
Copying rootfs to /srv/vservers/lxc/test-bt/rootfs ...
Transaction commit: none (default)
Delete subvolume '/srv/vservers/lxc/test-bt/rootfs'
Create a snapshot of '/var/cache/lxc/trusty/rootfs-amd64' in
'/srv/vservers/lxc/test-bt/rootfs'
ERROR: cannot snapshot '/var/cache/lxc/trusty/rootfs-amd64' - Invalid
cross-device link
lxc_container: lxccontainer.c: create_run_template: 1108 container creation
template for test-bt failed
lxc_container: lxccontainer.c: container_destroy: 2056 Error destroying
rootfs for test-bt
lxc_container: lxc_create.c: main: 274 Error creating container test-bt
## Thoughts
Maybe this is the expected behavior, if so a Documentation update stating
something to the effect of "If you change the lxcpath to a different filesystem
than the one where /var/cache/lxc livs you cannot create a btrfs backed
container."
-or-
Let /var/cache/lxc be configured via lxc.conf and have the documentation note
that they should reside on the same filesystem.
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