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Bjørn Forsman 5f17aeb403 nixos/docker: default storageDriver to "devicemapper" 
Commit 9bfe92ecee ("docker: Minor improvements, fix failing test") added
the services.docker.storageDriver option, made it mandatory but didn't
give it a default value. This results in an ugly traceback when users
enable docker, if they don't pay enough attention to also set the
storageDriver option. (An attempt was made to add an assertion, but it
didn't work, possibly because of how "mkMerge" works.)

The arguments against a default value were that the optimal value
depends on the filesystem on the host. This is, AFAICT, only in part
true. (It seems some backends are filesystem agnostic.) Also, docker
itself uses a default storage driver, "devicemapper", when no
--storage-driver=x options are given. Hence, we use the same value as
default.

Add a FIXME comment that 'devicemapper' breaks NixOS VM tests (for yet
unknown reasons), so we still run those with the 'overlay' driver.

Closes #10100 and #10217.
2015-10-04 14:34:38 +02:00
..
doc/manual rl-1509.xml: Gnome -> GNOME 2015-10-01 12:53:27 +02:00
lib Fix Nix database in generated images 2015-09-28 14:47:48 +02:00
maintainers Hack to parallelize AMI copying 2015-09-29 14:54:12 +02:00
modules nixos/docker: default storageDriver to "devicemapper" 2015-10-04 14:34:38 +02:00
tests nixos/docker: default storageDriver to "devicemapper" 2015-10-04 14:34:38 +02:00
COPYING Move all of NixOS to nixos/ in preparation of the repository merge 2013-10-10 13:28:20 +02:00
default.nix Fix nixos-option 2013-10-28 22:45:58 +01:00
README Move all of NixOS to nixos/ in preparation of the repository merge 2013-10-10 13:28:20 +02:00
release-combined.nix Disable lightdm test 2015-08-17 10:48:04 +02:00
release-small.nix release-small.nix: Drop the grub1 test 2015-08-11 13:51:55 +02:00
release.nix Disable the ec2-config test 2015-09-28 13:47:14 +02:00

README 

*** NixOS ***

NixOS is a Linux distribution based on the purely functional package
management system Nix.  More information can be found at
http://nixos.org/nixos and in the manual in doc/manual.