mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-11-25 07:16:17 +02:00
62 lines
2.6 KiB
Markdown
62 lines
2.6 KiB
Markdown
|
# Release 1.1 (2012-07-18)
|
||
|
|
|
||
|
|
This release has the following improvements:
|
||
|
|
|
||
|
|
- On Linux, when doing a chroot build, Nix now uses various namespace
|
||
|
|
features provided by the Linux kernel to improve build isolation.
|
||
|
|
Namely:
|
||
|
|
|
||
|
|
- The private network namespace ensures that builders cannot talk
|
||
|
|
to the outside world (or vice versa): each build only sees a
|
||
|
|
private loopback interface. This also means that two concurrent
|
||
|
|
builds can listen on the same port (e.g. as part of a test)
|
||
|
|
without conflicting with each other.
|
||
|
|
|
||
|
|
- The PID namespace causes each build to start as PID 1. Processes
|
||
|
|
outside of the chroot are not visible to those on the inside. On
|
||
|
|
the other hand, processes inside the chroot *are* visible from
|
||
|
|
the outside (though with different PIDs).
|
||
|
|
|
||
|
|
- The IPC namespace prevents the builder from communicating with
|
||
|
|
outside processes using SysV IPC mechanisms (shared memory,
|
||
|
|
message queues, semaphores). It also ensures that all IPC
|
||
|
|
objects are destroyed when the builder exits.
|
||
|
|
|
||
|
|
- The UTS namespace ensures that builders see a hostname of
|
||
|
|
`localhost` rather than the actual hostname.
|
||
|
|
|
||
|
|
- The private mount namespace was already used by Nix to ensure
|
||
|
|
that the bind-mounts used to set up the chroot are cleaned up
|
||
|
|
automatically.
|
||
|
|
|
||
|
|
- Build logs are now compressed using `bzip2`. The command `nix-store
|
||
|
|
-l` decompresses them on the fly. This can be disabled by setting
|
||
|
|
the option `build-compress-log` to `false`.
|
||
|
|
|
||
|
|
- The creation of build logs in `/nix/var/log/nix/drvs` can be
|
||
|
|
disabled by setting the new option `build-keep-log` to `false`. This
|
||
|
|
is useful, for instance, for Hydra build machines.
|
||
|
|
|
||
|
|
- Nix now reserves some space in `/nix/var/nix/db/reserved` to ensure
|
||
|
|
that the garbage collector can run successfully if the disk is full.
|
||
|
|
This is necessary because SQLite transactions fail if the disk is
|
||
|
|
full.
|
||
|
|
|
||
|
|
- Added a basic `fetchurl` function. This is not intended to replace
|
||
|
|
the `fetchurl` in Nixpkgs, but is useful for bootstrapping; e.g., it
|
||
|
|
will allow us to get rid of the bootstrap binaries in the Nixpkgs
|
||
|
|
source tree and download them instead. You can use it by doing
|
||
|
|
`import <nix/fetchurl.nix> { url =
|
||
|
|
url; sha256 =
|
||
|
|
"hash"; }`. (Shea Levy)
|
||
|
|
|
||
|
|
- Improved RPM spec file. (Michel Alexandre Salim)
|
||
|
|
|
||
|
|
- Support for on-demand socket-based activation in the Nix daemon with
|
||
|
|
`systemd`.
|
||
|
|
|
||
|
|
- Added a manpage for nix.conf5.
|
||
|
|
|
||
|
|
- When using the Nix daemon, the `-s` flag in `nix-env -qa` is now
|
||
|
|
much faster.
|