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58 Commits

Author SHA1 Message Date
Alexander Larsson 43a7d3d0e9 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.
 2013-09-30 17:35:01 -06:00
Alexander Larsson 5d2ace3424 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
 2013-09-30 17:35:01 -06:00
Alexander Larsson fdbc2695fe 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.
 2013-09-30 17:35:01 -06:00
Alexander Larsson 9e64ebb295 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.
 2013-09-30 17:35:01 -06:00
Alexander Larsson 6094257b28 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.
 2013-09-30 17:35:00 -06:00
Alexander Larsson b0626f403b Implement container.ExportRW() on device-mapper 2013-09-30 17:34:59 -06:00
Alexander Larsson 1c5dc26a7c 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.
 2013-09-30 17:34:59 -06:00
Alexander Larsson 074f38d493 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
 2013-09-30 17:34:59 -06:00
Alexander Larsson a9ec1dbc9b 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.
 2013-09-30 17:34:59 -06:00
Alexander Larsson d2ba3e2005 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
 2013-09-30 17:34:59 -06:00
Alexander Larsson e368c8bb01 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
 2013-09-30 17:34:58 -06:00
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
Guillaume J. Charmes 03e4704ae5 Merge pull request #442 from dotcloud/fix_deleted_file_diff 
Use aufs to handle parents whiteouts instead of doing it manually
 2013-04-22 18:23:46 -07:00
Solomon Hykes baacae8345 'docker push' buffers filesystem archives on disk instead of memory. 2013-04-21 14:23:55 -07:00
Guillaume J. Charmes e49af5b6de Use aufs to handle parents whitouts instead of doing it manually 2013-04-19 16:33:25 -07:00
Solomon Hykes 4ef2d5c1e6 Added 'author' field to the image format 2013-04-17 19:58:17 -07:00
Victor Vieux ac49a797b4 try to load aufs module, disply error on failure 2013-04-15 12:05:46 +02:00
Solomon Hykes 8bfbdd7afa Add versioning to docker image format. IMPORTANT: the format versioning is pegged to docker's versioning, so changes to the format MUST trigger an increment in version number. 2013-04-04 18:38:43 -07:00
Solomon Hykes 1632566ecb Show shorthand image IDs for convenience. Shorthand IDs (or any non-conflicting prefix) can be used to lookup images 2013-03-31 22:11:55 -07:00
Jonathan Rudenberg 141b5fc7d7 Simplify id generation 
Instead of using a SHA-256 of a random number, hex encode 32 bytes
of random data from crypto/rand (sourced from /dev/urandom).
 2013-03-26 19:29:44 -04:00