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62 Commits

Author SHA1 Message Date
Guillaume J. Charmes 78d2e2dc37
Reduce debugf frequency to avoid terminal freeze 2013-11-25 12:06:16 -08:00
Michael Crosby 8b0b10b6f9 Rename dummy in driver.go to vfs 2013-11-25 10:28:17 -08:00
Michael Crosby cee0a292d0 Rename dummy driver to vfs 2013-11-25 09:04:04 -08:00
Guillaume J. Charmes 79e2b33ede
Use variable to call functions in devmapper_wrapper + some formatting 2013-11-22 12:25:37 -08:00
Michael Crosby 437bdeee59 Merge pull request #62 from shykes/devmapper-unit-tests 
Devmapper unit tests
 2013-11-21 16:54:50 -08:00
Guillaume J. Charmes bc82940a57
Forbid syscalls in tests, add 2 new unit tests 2013-11-21 16:32:16 -08:00
Solomon Hykes df258f5861 Devmapper: test driver initialization and its interaction with libdevmapper 2013-11-21 02:17:03 +00:00
Solomon Hykes 60f728b170 Devmapper: wrap calls to os/exec for easier mocking 2013-11-21 02:16:26 +00:00
Solomon Hykes 2b7c63b1b5 devmapper: skip test which are not unit tests 2013-11-21 02:12:51 +00:00
Michael Crosby 5306053e21 Add more aufs tests and implement Status 2013-11-20 15:41:37 -08:00
Solomon Hykes e2390318bb Devmapper: mock all calls to libdevmapper in the unit tests, and deny them by default 2013-11-20 23:39:02 +00:00
Solomon Hykes da514223d1 Devmapper: remove deprecated test helpers 2013-11-20 23:25:27 +00:00
Solomon Hykes 023ff36704 devmapper: fix typo 2013-11-20 23:12:19 +00:00
Guillaume J. Charmes d233894c25
Add devmapper struct doc 2013-11-20 14:09:46 -08:00
Guillaume J. Charmes a39bd65662
Remove os from devmapper 2013-11-20 13:05:17 -08:00
Guillaume J. Charmes 5690139785
Remove all syscall calls from devicemapper 2013-11-20 12:49:01 -08:00
Solomon Hykes 92f94f06ae Mock calls to system functions to facilitate unit testing 2013-11-20 20:05:10 +00:00
Michael Crosby 1b28cdc7f9 Handle image metadata when drivers are switched 2013-11-20 10:31:51 -08:00
Michael Crosby d4ef551d65 Merge pull request #53 from shykes/improve_cleanup 
Improve aufs cleanup and debugging
 2013-11-19 17:16:36 -08:00
Victor Vieux 76f54f3a28 Merge pull request #39 from crosbymichael/add-driver-flag 
Add flag to set default graph driver
 2013-11-19 17:16:25 -08:00
Victor Vieux 43899a77bf improve aufs cleanup and debugging 2013-11-19 17:12:37 -08:00
Guillaume J. Charmes 3e0a5ac48b Merge pull request #41 from alexlarsson/dm-plugin-device-tool 
Update docker-device-tool
 2013-11-19 15:38:47 -08:00
Guillaume J. Charmes 12e993549d
Fix unit-tests 2013-11-19 15:24:14 -08:00
Victor Vieux 5a4113140e Merge pull request #43 from alexlarsson/dm-plugin-use-root-subdir 
devmapper: Use a "root" subdirectory in the devmapper volume
 2013-11-19 13:51:04 -08:00
Victor Vieux 85b5062502 Merge pull request #44 from crosbymichael/container-migration 
Container and Image migration for aufs
 2013-11-19 13:47:23 -08:00
Michael Crosby 4c2624a277 Merge pull request #45 from alexlarsson/dm-plugin-diff-size 
Implement fallback for getting the size of a container
 2013-11-19 10:25:31 -08:00
Michael Crosby f4b3b7c055 Merge pull request #47 from alexlarsson/dm-plugin-ummount-when-removing 
Devicemapper: Unmount when removing device
 2013-11-19 10:24:44 -08:00
Alexander Larsson 0ed762f2d2 devicemapper: Unmount when removing device 
Without this the remove will fail due to a busy device.
 2013-11-19 14:40:15 +01:00
Alexander Larsson 242fd4b3ef dummy driver: Use cp --reflink=auto to copy directories 
On systems that supports reflinking (i.e. btrfs) this means the dummy
backend is much faster at copying files and will be sharing file data in
a CoW fashion.

On my (btrfs) system this makes "docker run ubuntu echo hello world" go
from about 3 seconds to about 1 second. Not instant, but clearly better.

cp --reflink=auto is availible since coreutils 7.5 (around 2009), so this
seems pretty ok to rely on.

cp is also better at preserving file metadata than tar, so for instance
it will copy xattrs.
 2013-11-19 13:09:36 +01:00
Michael Crosby 51a972f38d Rename AufsDriver to Driver to be consistent 2013-11-19 03:27:59 -08:00
Michael Crosby aea6001baf Check env var for setting driver in tests 2013-11-19 03:13:22 -08:00
Michael Crosby 6dbeed89c0 Add flag to set default graph driver 
Remove the env var DOCKER_DRIVER
 2013-11-19 02:37:44 -08:00
Alexander Larsson 5d76681c3d Implement fallback for getting the size of a container 
This moves Driver.Size() to Differ.DiffSize(), removing the empty
implementations in devmapper and dummy, and renaming the one in aufs.

Then we fall back to a container.Changes() implementation in the non-aufs
case.
 2013-11-19 10:36:54 +01:00
Alexander Larsson 9415c2b1f0 Move docker-device-tool to contrib 2013-11-19 10:03:04 +01:00
Alexander Larsson a0224e61b4 devicemapper tool: Add support for pool resizing 2013-11-19 09:59:13 +01:00
Alexander Larsson 80aecc7014 devmapper: Update device-mapper-tool 
This makes the device mapper tool work again and adds new features
to get pool status, device status and to list all devices.
 2013-11-19 09:44:19 +01:00
Alexander Larsson 00401a30b7 devmapper: Use a "rootfs" subdirectory in the devmapper volume 
We place the actual image/containers in the "rootfs" directory, which
allows us to have other data in the toplevel directory in the mount.

For starters, this means the "lost+found" directory from mkfs will
not always be in your container/image.

Secondly, we can create a file "id" in the toplevel dir which is not
visible from the container. This is useful because it allows us to map
back from the device fs to the container if something goes wrong with
the devicemapper metadata.
 2013-11-19 09:29:42 +01:00
Michael Crosby 5ee8e41e43 Retry moving dirs on every daemon startup 
This will try to move the directories that were
previously symlinked until a full migration is complete.
 2013-11-18 23:28:45 -08:00
Michael Crosby 29f07f8544 Add container migration to aufs driver 2013-11-18 18:39:21 -08:00
Michael Crosby f88b760809 Migrate images with parent relationship 2013-11-18 16:17:43 -08:00
Michael Crosby 94e854823f Use tryRelocate to fall back to symlink if rename fails 2013-11-18 13:16:28 -08:00
Guillaume J. Charmes a518b84751
WIP 2013-11-15 17:16:30 -08:00
Guillaume J. Charmes 035c144242
Move all drivers to the same subdir graphdriver 2013-11-15 15:48:24 -08:00
Michael Crosby 7cad77b1e2 Merge pull request #33 from alexlarsson/dm-plugin-status 
Add driver plugin status
 2013-11-15 10:15:59 -08:00
Alexander Larsson 10f23a94f6 Use dummy driver for volumes 
It makes no sense to use the aufs or devicemapper drivers for volumes.
The aufs one is perhaps not a big problem, but the devicemapper one
certainly is. It will be unnecessarily using a dm
blockdevice-over-loopback with a limited size base FS.

This just hardcodes the driver to be the dummy, perhaps in the future
we can have other drivers that make sense for the volumes.
 2013-11-15 11:30:28 +01:00
Alexander Larsson 243843c078 Print devicemapper status details in docker info 
This adds a generic Status call in the Driver api and
implements if for the devicemapper backend.

The status is an array of key/value strings rather than a map so that
we can guarantee some static order of the docker info output.
 2013-11-15 11:04:02 +01:00
Alexander Larsson 062810caed Show active driver in docker info output 2013-11-15 10:24:48 +01:00
Michael Crosby 5d9723002b Allow drivers to implement ApplyDiff in Differ interface 2013-11-11 19:09:57 -08:00
Michael Crosby 4d1a537433 Remove Differ and Changer interfaces 
Add the methods to the Driver interface
to force the drivers to implement the methods
 2013-11-11 12:10:53 -08:00
Alexander Larsson e82f8c1661 Implement fallback operation for driver.Diff() 
This moves the Diff() operation to a separate Differ interface and
implements a fallback that uses the Changes() results to encode
a diff tar.
 2013-11-11 17:46:07 +01:00