The ZFS driver should raise proper errors when the ZFS utility is
missing or when there's no zfs partition active on the system. Raising the
proper errors make possible to silently ignore the ZFS storage
driver when no default storage driver is specified.
Previous to this commit it was no longer possible to start the
docker daemon in that way:
docker -d --storage-opt dm.loopdatasize=2GB
The above command resulted in an exit error because the ZFS driver
tried to use the storage options.
Signed-off-by: Flavio Castelli <fcastelli@suse.com>
Replaced github.com/docker/libcontainer with
github.com/opencontainers/runc/libcontaier.
Also I moved AppArmor profile generation to docker.
Main idea of this update is to fix mounting cgroups inside containers.
After updating docker on CI we can even remove dind.
Signed-off-by: Alexander Morozov <lk4d4@docker.com>
Export image/container metadata stored in graph driver. Right now 3 fields
DeviceId, DeviceSize and DeviceName are being exported from devicemapper.
Other graph drivers can export fields as they see fit.
This data can be used to mount the thin device outside of docker and tools
can look into image/container and do some kind of inspection.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Previously the cache was only updated once on startup, because the graph
code only check for filesystems on startup. However this breaks the API as it
was supposed and so unit tests.
Fixes#13142
Signed-off-by: Jörg Thalheim <joerg@higgsboson.tk>
The docker graph call driver.Exists() on initialisation for each filesystem in
the graph. This results will results in a lot `zfs get all` commands. To reduce
this, retrieve all descend filesystem at startup and cache it for later checks
Signed-off-by: Jörg Thalheim <joerg@higgsboson.tk>
instead of let zfs automaticly mount datasets, mount them on demand using mount(2).
This speed up this graph driver in 2 ways:
- less zfs processes needed to start a container
- /proc/mounts get smaller, so zfs userspace tools has less to read (which can
a significant amount of data as the number of layer grows)
This ways it can be also ensured that the correct mountpoint is always used.
Signed-off-by: Jörg Thalheim <joerg@higgsboson.tk>
