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66 Commits

Author SHA1 Message Date
Alexander Larsson b5795749d1 Remove devicemapper lazy initialization 
We now always initialize devicemapper on startup, so
no need for the code that did lazy initialization, we
just delete it.
 2013-11-11 13:29:27 +01:00
Michael Crosby 9514767587 Allow driver to provide changes if it impl the Changer interface 2013-11-08 14:54:20 -08:00
Michael Crosby 51c93c0f33 Fix aufs error at startup 
Add String methods to other drivers
 2013-11-07 19:02:15 -08:00
Solomon Hykes 9ae4bcaaf8 Move Change to the archive package, and fix a leftover merge in 
Container.Inject()
 2013-11-08 00:45:07 +00:00
Solomon Hykes f1127b9308 gofmt 2013-11-07 23:58:03 +00:00
Solomon Hykes 4a8a7d4edd devmapper: port to the new driver API and reactivate driver 2013-11-07 22:41:55 +00:00
Michael Crosby 752bfba2c5 Add graph driver registration 2013-11-04 15:22:34 -08:00
Solomon Hykes 6c77f2c189 devmapper: rename plugin*.go to driver*.go 2013-11-04 17:23:46 +00:00
Solomon Hykes b77c5c5984 devmapper: renamed DMBackend to Driver 2013-11-04 17:22:43 +00:00
Solomon Hykes d23b9e8734 devmapper: implement OnRemove 2013-11-02 21:25:06 +00:00
Solomon Hykes d2c2c2c116 devmapper: rename Create() to OnCreate(), cleanup tests 2013-11-01 19:30:30 +00:00
Solomon Hykes d64df7c765 Work In Progress: fix devmapper plugin, first independent test passes. 2013-11-01 19:04:08 +00:00
Solomon Hykes 86dd2473c1 Work In Progress: devmapper backend plugin 2013-11-01 05:06:49 +00:00
Alexander Larsson 2812baf395 devmapper: Fix prefix name to work with udev 
Udev escapes "," used in device names to 0\x2c which breaks libdevmapper.
Instead use : to escape minor and minor which works.
 2013-10-18 11:39:47 +02:00
Alexander Larsson 572b1fd9be devmapper: Fix major/minor extraction 
The way devices are mapped is a bit more complex than before.
This implements the method from new_decode_dev in:
https://github.com/mirrors/linux-2.6/blob/master/include/linux/kdev_t.h

Which is what is needed on kernels > 2.6
 2013-10-18 11:38:21 +02:00
Solomon Hykes 4756ad248a devmapper: use major,minor of underlying device in devmapper device name, for readability. 2013-10-18 08:30:53 +00:00
Solomon Hykes dfb77274ce devmapper: clearer make the 'unknown base hash' error message more understandable 2013-10-18 08:22:42 +00:00
Solomon Hykes 73545199a8 Merge remote-tracking branch 'alexlarsson/dm-status' into dm 
Conflicts:
	devmapper/deviceset.go
 2013-10-18 07:17:13 +00:00
Solomon Hykes 0ad35c6746 devmapper: cleanup error reporting 2013-10-18 07:09:13 +00:00
Solomon Hykes 5e363072f5 Merge branch 'dm' of ssh://github.com/dotcloud/docker into dm 2013-10-18 06:51:50 +00:00
Solomon Hykes 9f85a967bb Merge pull request #2269 from alexlarsson/dm-blocksize 
devmapper: Use a smaller blocksize for the thin-pool
 2013-10-17 22:50:33 -07:00
Solomon Hykes 85a36b3b53 devmapper: rename deviceset_devmapper.go to deviceset.go 2013-10-18 05:19:22 +00:00
Solomon Hykes d3505d836a Merge remote-tracking branch 'alexlarsson/dm-readonly-images' into dm 
Conflicts:
	devmapper/deviceset_devmapper.go
 2013-10-18 03:40:46 +00:00
Solomon Hykes 4bd6021806 devmapper: Rename DeviceSetDM to DeviceSet 2013-10-18 00:07:56 +00:00
Guillaume J. Charmes 31b883b076
Add error checking and error messages 2013-10-17 15:04:14 -07:00
Alexander Larsson a14496ce89 Devmapper: Mount images readonly when calculating changes 
There is no need to have this be writable, and there is a chance
that e.g. atime updates will cause writes to the image which is
bad for disk use wrt sharing between all containers.
 2013-10-17 16:14:53 +02:00
Alexander Larsson 8abcc8e713 devmapper: Use a smaller blocksize for the thin-pool 
As per the thin provisioning docs for creating the pool:

   $data_block_size gives the smallest unit of disk space that can be
   allocated at a time expressed in units of 512-byte sectors.
   $data_block_size must be between 128 (64KB) and 2097152 (1GB) and a
   multiple of 128 (64KB). $data_block_size cannot be changed after the
   thin-pool is created. People primarily interested in thin provisioning
   may want to use a value such as 1024 (512KB). People doing lots of
   snapshotting may want a smaller value such as 128 (64KB).

The switch from 512 (which we used before) to 128 (recommended above
for lots of snapshoting) means a simple container creation (based on the
mattdm/fedora:f19 image) adds 1 MB of diskspace rather than 3.6.
This seems more in tune with how docker is typically used.
 2013-10-17 15:33:00 +02:00
Alexander Larsson d733cdcebb Show devicemapper status in "docker info" 
This shows the current global diskspace use in "docker info"
 2013-10-17 15:32:07 +02:00
Alexander Larsson e6a73e65a2 devicemapper: Use device/inode of the root dir, not the image 
This way the devicemapper prefix stays stable even if we're not
using loopback mounted devices.
 2013-10-17 09:53:09 +02:00
Solomon Hykes ad2fbd9e87 devmapper: error reporting workaround in waitRemove() 2013-10-17 01:49:51 +00:00
Solomon Hykes e5d7472a0d devmapper: small fixes in error reporting 2013-10-17 01:49:27 +00:00
Solomon Hykes 7d3c7e2b29 devmapper: debug messages 2013-10-17 01:47:03 +00:00
Solomon Hykes f1d07e2dbe devmapper: prefix device names with the dev_id+inode of the data image 2013-10-17 01:46:28 +00:00
Solomon Hykes ad968ef3ef devmapper: add useful comments 2013-10-17 01:42:05 +00:00
Solomon Hykes c688e9b5a6 devmapper: debug messages 2013-10-16 23:27:33 +00:00
Solomon Hykes ea04f3de72 devmapper: wait for devices to be effectively removed before returning a successful remove 2013-10-16 23:26:37 +00:00
Solomon Hykes 153248b60f devicemapper: remove unused code 2013-10-16 23:23:35 +00:00
Solomon Hykes 1711de4b09 devmapper: wait for devices to be effectively unmounted before removing them 2013-10-16 23:06:07 +00:00
Solomon Hykes 11d695a297 Add debug messages while testing devicemapper 2013-10-16 20:45:59 +00:00
Guillaume J. Charmes 3a246ac3d1 Change default values for devicemapper as variable instead of env 2013-10-16 20:42:50 +00:00
Solomon Hykes cd61fb2e6f WIP: debugging dm-base-hash + dm-refactor-init 2013-10-15 23:56:04 +00:00
Solomon Hykes fdba1aeed8 Merge branch 'dm-refactor-init' into dm 
Conflicts:
	runtime_test.go
 2013-10-15 23:27:28 +00:00
Solomon Hykes c9f3e54c31 Merge branch 'dm-base-hash' into dm 2013-10-15 23:09:26 +00:00
Alexander Larsson 5ebaca7e55 devmapper: create device nodes 'on create' instead of 'on resume' 2013-10-15 21:27:47 +00:00
Michael Crosby 4431e9edb7 Rename loopback dir to devicemapper 2013-10-15 11:30:06 -07:00
Michael Crosby 3455c1a098 Use incrementing prefix on pool and loopback to allow dind 2013-10-14 17:48:43 -07:00
Michael Crosby c3f1bb3287 Allow loopback and base fs sizes set by env var 2013-10-11 20:37:11 -07:00
Alexander Larsson b440ec0136 device-mapper: Move all devicemapper spew to log through utils.Debugf(). 2013-10-11 16:31:06 -07:00
Alexander Larsson c77697a45c devmapper: Move all "raw" libdevmapper wrappers to devmapper.go 
This separates out the DeviceSet logic a bit better from the raw
device mapper operations.

devicemapper: Serialize addess to the devicemapper deviceset

This code is not safe to run in multiple threads at the same time,
and neither is libdevmapper.

DeviceMapper: Move deactivate into UnmountDevice

This way the deactivate is atomic wrt othe device mapper operations
and will not fail with EBUSY if someone else starts a devicemapper
operation inbetween unmount and deactivate.

devmapper: Fix loopback mounting regression

Some changes were added to attach_loop_device which added
a perror() in a place that caused it to override errno so that
a later errno != EBUSY failed. This fixes that and cleans up
the error reporting a bit.

devmapper: Build on old kernels without LOOP_CTL_GET_FREE define
 2013-10-11 16:30:02 -07:00
Victor Vieux f6913592a1 Merge pull request #2087 from alexlarsson/device-mapper-test 
Device mapper test branch update
 2013-10-04 07:54:43 -07:00