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66 Commits

Author SHA1 Message Date
Guillaume J. Charmes 8b2f4aab23
Random improvments 2013-10-02 20:18:15 -07:00
Alexander Larsson 75e958bf48 Image: Fix time setting for old kernels 
This is a better fix for futimes() on kernels not supporting O_PATH.
The previous fix broke when copying a device, as it tried to open it
and got and error.
 2013-09-26 23:59:37 +02:00
Victor Vieux ebfa24acb0 go fmt and aufs support removed 2013-09-26 15:40:13 +00:00
Alexander Larsson 6c7ae06435 Image.Changes: Deactivate image device after unmounting it 
There is no need to keep the image device around if we were the
onces creating the device.
 2013-09-26 15:09:33 +00:00
Alexander Larsson 41399ac005 image: Unmount before removing device in error paths 
The device remove fails unless we unmount first
 2013-09-26 15:09:33 +00:00
Alexander Larsson 009d0f9d81 Image: unmount device before removing it on failures 
If we don't do this the remove will fail due to EBUSY
 2013-09-26 15:09:32 +00:00
Alexander Larsson ed65815613 image: Handle systems that don't support O_PATH when updating timestamp 
Older kernel can't handle O_PATH in open() so this will
fail on dirs and symlinks. For dirs wa can fallback to
the normal Utimes, but for symlinks there is not much to do
but ignore their timestamps.
 2013-09-26 15:09:32 +00:00
Alexander Larsson 062a2b32e9 applyLayer() use btrfs reflinks if availible 
We use the new file copy helper which uses btrfs reflinks if availible.
 2013-09-26 15:09:32 +00:00
Alexander Larsson adae684987 Add trivial copy-based CoW backend 
This creates a container by copying the corresponding files
from the layers into the containers. This is not gonna be very useful
on a developer setup, as there is no copy-on-write or general diskspace
sharing. It also makes container instantiation slower.

However, it may be useful in deployment where we don't always have a lot
of containers running (long-running daemons) and where we don't
do a lot of docker commits.
 2013-09-26 15:09:32 +00:00
Alexander Larsson 99c7d129f4 Image.applyLayer: Be better at creating identical files 
There are some changes here that make the file metadata better match
the layer files:

* Set the mode of the file after the chown, as otherwise the per-group/uid
  specific flags and e.g. sticky bit is lost
* Use lchown instead of chown
* Delay mtime updates to after all other changes so that later file
  creation doesn't change the mtime for the parent directory
* Use Futimes in combination with O_PATH|O_NOFOLLOW to set mtime on symlinks
 2013-09-26 15:09:32 +00:00
Alexander Larsson c199ed228b devmapper: Move init layer to top rather than bottom 
The init layer needs to be topmost to make sure certain files
are always there (for instance, the ubuntu:12.10 image wrongly
has /dev/shm being a symlink to /run/shm, and we need to override
that). However, previously the devmapper code implemented the
init layer by putting it in the base devmapper device, which meant
layers above it could override these files (so that ubuntu:12.10
broke).

So, instead we put the base layer in *each* images devmapper device.
This is "safe" because we still have the pristine layer data
in the layer directory. Also, it means we diff the container
against the image with the init layer applied, so it won't show
up in diffs/commits.
 2013-09-26 15:09:32 +00:00
Alexander Larsson 251a7ed437 DeviceSet: Add UnmountDevice() 
Right now this does nothing but add a new layer, but it means
that all DeviceMounts are paired with DeviceUnmounts so that we
can track (and cleanup) active mounts.
 2013-09-26 15:09:31 +00:00
Alexander Larsson bc7fa7b957 Limit the amount of prints during normal runs 
This removes some Debugf() calls and chages some direct prints to
Debugf(). This means we don't get a bunch of spew when running the
tests.
 2013-09-26 15:09:31 +00:00
Alexander Larsson 94fa3c7bb5 Implement container.ExportRW() on device-mapper 2013-09-26 15:08:55 +00:00
Alexander Larsson 8e8ef7cb5b Implement docker diff for device-mapper 
To do diffing we just compare file metadata, so this relies
on things like size and mtime/ctime to catch any changes.
Its *possible* to trick this by updating a file without
changing the size and setting back the mtime/ctime, but
that seems pretty unlikely to happen in reality, and lets
us avoid comparing the actual file data.
 2013-09-26 15:08:55 +00:00
Alexander Larsson b125f2334c Image: Always create a .docker-id file in the devices we create 
Without this there is really no way to map back from the device-mapper
devices to the actual docker image/container ids in case the json file
somehow got lost
 2013-09-26 15:08:55 +00:00
Alexander Larsson a89a51128e Image: Deactivate image device when unmounting container 
There is no need to keep all the device-mapper devices active, we
can just activate them on demand if needed.
 2013-09-26 15:08:54 +00:00
Alexander Larsson fcd41fe51a Image: Initial support for device-mapper mounts 
This supports creating images from layers and mounting them
for running a container.

Not supported yet are:
* Creating diffs between images/containers
* Creating layers for new images from a device-mapper container
 2013-09-26 15:08:54 +00:00
Alexander Larsson 8637ba710e Image: Add runtime and container id args to Mount() 
We will later need the runtime to get access to the VolumeSet
singleton, and the container id to have a name for the volume
for the container
 2013-09-26 15:08:54 +00:00
Guillaume J. Charmes f6fa353dd8 Merge pull request #1267 from sridatta/new-clean-init 
* Runtime: Fix to "Inject dockerinit at /.dockerinit"
 2013-08-05 13:23:22 -07:00
Guillaume J. Charmes 0f134b4bf8 Remove unused parameter 2013-07-29 11:30:17 -07:00
Guillaume J. Charmes 0badda9f15 Refactor the image size storage 2013-07-29 11:30:17 -07:00
Guillaume J. Charmes 8ca7b0646e Refactor checksum 2013-07-29 11:30:17 -07:00
Victor Vieux 1c509f4350 use 0755 instead of 0700 2013-07-25 15:45:15 +00:00
Solomon Hykes 5d8efc107d + Runtime: inject dockerinit at /.dockerinit instead of overwriting /sbin/init. This makes it possible to run /sbin/init inside a container. 2013-07-17 17:13:34 -07:00
Guillaume J. Charmes 08a87d4b3b Fix #1162 - Remove bufio from Untar 2013-07-08 13:42:17 -07:00
Solomon Hykes 290b1973a9 Fix a bug which caused creation of empty images (and volumes) to crash. FIxes #995. 2013-06-22 12:29:42 -07:00
Victor Vieux ddf5a1940f Merge branch 'master' into 22-add_sizes_images_and_containers-feature 2013-06-14 10:05:06 +00:00
Victor Vieux 00cf2a1fa2 fix virtual size on images 2013-06-14 10:05:01 +00:00
Victor Vieux bf63cb9045 bump to master again 2013-06-05 16:01:36 +00:00
Victor Vieux f67ea78cce move xino stuff to /dev/shm 2013-06-05 12:59:05 +00:00
Victor Vieux fd224ee590 linted names 2013-06-04 18:00:22 +00:00
Victor Vieux 86ada2fa5d drop/omit 2013-06-04 13:51:12 +00:00
unclejack 2cf92abf0e add arch field to image struct 2013-05-24 21:41:30 +03:00
Victor Vieux 6fce89e60b bump to master 2013-05-22 13:41:29 +00:00
Guillaume J. Charmes 9bb3dc9843 Split registry into subpackage 2013-05-15 01:41:39 +00:00
Guillaume J. Charmes 2e69e1727b Create a subpackage for utils 2013-05-14 22:37:35 +00:00
Victor Vieux a91b710961 add sizes in images and containers 2013-05-13 15:14:20 +02:00
Guillaume J. Charmes 44b33b44aa Factorize the checksums functions 2013-05-08 22:37:33 -07:00
Guillaume J. Charmes aaaf3f0726 Store the actual archive when commit 2013-05-08 19:08:11 -07:00
Guillaume J. Charmes 0e23b4e10e Store the checksums when pulling a repository 2013-05-08 16:27:35 -07:00
Guillaume J. Charmes 8ff1765674 Make the checksum async within commit 2013-05-08 12:01:12 -07:00
Guillaume J. Charmes c4ebf870c8 Use make instead of new 2013-05-08 10:35:41 -07:00
shin- d985050aeb gofmt pass 2013-05-06 10:57:36 -07:00
shin- be791a223b simplify image.Checksum 2013-05-06 10:56:55 -07:00
shin- f10b0f75e0 Fix checksum computing 2013-05-06 10:56:50 -07:00
shin- 6e2ddf6f60 Checksum system overhaul 2013-05-06 10:56:49 -07:00
shin- be75608906 Fixed checksum computing. Ensure checksum is computed when image metadata is loaded from disk. Fixed docker push workflow. Moved hash computing to utils 2013-05-06 10:56:10 -07:00
shin- 048fd671ef Implemented checksum computation on image creation (necessary for new push primitive) 2013-05-06 10:52:42 -07:00
Guillaume J. Charmes 51d6228261 Implement -config and -command in CmdCommit in order to allow autorun 2013-04-25 16:48:31 -07:00