Commit Graph

67 Commits

Author SHA1 Message Date
Allen Nelson
940aafcbcc use rsync, comment out pulls 2016-10-03 15:12:29 -05:00
Allen Nelson
b9007c8d83 add examples file 2016-10-03 12:07:33 -05:00
Allen Nelson
4abe579250 add docs to docker build functions
bring back ls_tar

replace goPackages with go

don't hardcode /nix/store in vmTools

more docs
2016-09-29 12:52:57 -05:00
Tom Boettcher
1e8b69c35e dockerTools: Fix layer redundancy.
When building an image with multiple layers, files
already included in an underlying layer are supposed to
be excluded from the current layer. However, some subtleties
in the way filepaths are compared seem to be blocking this.

Specifically:
* tar generates relative filepaths with directories ending in '/'
* find generates absolute filepaths with no trailing slashes on directories

That is, paths extracted from the underlying tarball look like:
    nix/store/.../foobar/
whereas the layer being generated uses paths like:
    /nix/store/.../foobar

This patch modifies the output of "tar -t" to match the latter format.
2016-09-23 16:40:59 -05:00
Profpatsch
61462c94e6 lib/fetchers.nix: factor out impure proxy vars (#18702)
Apparently everyone just copied those variables, instead of creating a
library constant for them. Some even removed the comment. -.-
2016-09-17 21:50:01 +02:00
Nathan Zadoks
b9284e445b dockerTools: disable compression in tarsum.go
Previously, tarsum would compress the (discarded) tarball produced.
That's a waste of CPU, and a waste of time.
2016-07-02 02:22:36 -04:00
Nathan Zadoks
23e9e33975 dockerTools: format tarsum.go with gofmt
Nearly all Go code on this earth is formatted with gofmt, and it's
somewhat surprising to find a Go file that isn't formatted accordingly.
2016-07-02 02:22:36 -04:00
Kamil Chmielewski
7eb671ebcd no more goPackages 2016-06-09 13:08:00 +02:00
Brian McKenna
0167b61ef4 dockerTools: only add "/nix" if it exists
The /nix path in 4d200538 of the layer tar didn't exist for some
packages, such as cacert. This is because cacert just creates an /etc
directory and doesn't depend on any other /nix paths. If we tried
putting this directory in the tar and using overlayfs with it, we'd get
"Invalid argument" when trying to remove the directory.

We now check whether the closure is non-empty before telling tar to
store the /nix directory.

Fixes #14710.
2016-04-16 01:16:49 +10:00
Brian McKenna
bc2f314f73 dockerTools: make tars deterministic
There were two sources of non-determinisim coming into the images. The
first was tar mtimes, the second was pigz/gzip times.

An example image now passes with the --check flag.
2016-04-15 09:29:15 +10:00
Luca Bruno
44d651485a dockerTools: fix difference between base files and layer files 2016-04-14 12:23:49 +02:00
Luca Bruno
4d200538c2 dockerTools: fix /nix/store permissions 2016-04-14 12:23:48 +02:00
Brian McKenna
d150fe8915 dockerTools: use pigz for final image tar
Saves a few seconds on large images.
2016-04-11 16:32:47 +10:00
Brian McKenna
ebb911cc0b dockerTools: remove tarballs functionality
I think the intention of this functionality was to provide a simple
alternative to the "runAsRoot" and "contents" attributes.

The implementation caused very slow builds of Docker images. Almost all
of the build time was spent in IO for tar, due to tarballs being
created, immediately extracted, then recreated. I had 30 minute builds
on some of my images which are now down to less than 2 minutes. A couple
of other users on #nix IRC have observed similar improvements.

The implementation also mutated the produced Docker layers without
changing their hashes. Using non-empty tarballs would produce images
which got cached incorrectly in Docker.

I have a commit which just fixes the performance problem but I opted to
completely remove the tarball feature after I found out that it didn't
correctly implement the Docker Image Specification due to the broken
hashing.
2016-04-11 16:32:43 +10:00
Asko Soukka
584427c694 dockerTools: Fix issue where image name with repository prefix was not supported 2016-02-18 18:16:58 +02:00
Arthur Noel
903129f770 dockerTools: private registry support
* authorization token is optional
* registry url is taken from X-Docker-Endpoints header
* pull.sh correctly resumes partial layer downloads
* detjson.py does not fail on missing keys
2016-01-27 21:13:07 +00:00
Luca Bruno
4a4561ce24 dockerTools: nix functions for manipulating docker images 2016-01-13 10:27:37 +01:00