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Rovanion Luckey c4702f938c
installer: Handle edge case where the nix-daemon is already running on the system
On a systemd-based Linux distribution: If the user has previously had multi-user Nix installed on the system, removed it and then reinstalled multi-user Nix again the old nix-daemon.service will still be running when `scripts/install-systemd-multi-user.sh` tries to start it which results in nothing being done and the old daemon continuing its run.

When a normal user then tries to use Nix through the daemon the nix binary will fail to connect to the nix-daemon as it does not belong to the currently installed Nix system. See below for steps to reproduce the issue that motivated this change.

$ sh <(curl https://nixos.org/nix/install) --daemon

$ sudo rm -rf /etc/nix /nix /root/.nix-profile /root/.nix-defexpr /root/.nix-channels /home/nix-installer/.nix-profile /home/nix-installer/.nix-defexpr /home/nix-installer/.nix-channels ~/.nix-channels ~/.nix-defexpr/ ~/.nix-profile /etc/profile.d/nix.sh.backup-before-nix /etc/profile.d/nix.sh; sed -i '/added by Nix installer$/d' ~/.bash_profile

$ unset NIX_REMOTE

$ sh <(curl https://nixos.org/nix/install) --daemon

└$ export NIX_REMOTE=daemon

└$ nix-env -iA nixpkgs.hello
installing 'hello-2.10'
error: cannot connect to daemon at '/nix/var/nix/daemon-socket/socket': No such file or directory
(use '--show-trace' to show detailed location information)

└$ sudo systemctl restart nix-daemon.service

└$ nix-env -iA nixpkgs.hello
installing 'hello-2.10'
these paths will be fetched (6.09 MiB download, 27.04 MiB unpacked):
  /nix/store/2g75chlbpxlrqn15zlby2dfh8hr9qwbk-hello-2.10
  /nix/store/aag9d1y4wcddzzrpfmfp9lcmc7skd7jk-glibc-2.27
copying path '/nix/store/aag9d1y4wcddzzrpfmfp9lcmc7skd7jk-glibc-2.27' from 'https://cache.nixos.org'...
copying path '/nix/store/2g75chlbpxlrqn15zlby2dfh8hr9qwbk-hello-2.10' from 'https://cache.nixos.org'...
building '/nix/store/w9adagg6vlikr799nkkqc9la5hbbpgmi-user-environment.drv'...
created 2 symlinks in user environment

(cherry picked from commit a413594baf)
Signed-off-by: Domen Kožar <domen@dev.si>
2020-05-26 11:39:02 +02:00
.github Remove .github/FUNDING.yml 2019-07-23 15:21:23 +02:00
config update config/config.{sub,guess} 2018-08-13 20:00:17 +00:00
contrib function-trace: always show the trace 2020-01-05 16:30:32 +01:00
corepkgs nix-channel: Don't fetch binary-cache-url 2019-06-25 13:27:16 +02:00
doc/manual style.css: Remove 2020-03-13 15:07:45 +01:00
m4 autoconf: Fix C++17 detection not working on Ubuntu 16.04. 2019-07-03 04:32:25 +02:00
maintainers Fix release script 2019-04-15 19:17:17 +02:00
misc Make nix-daemon.plist less fragile on macOS 2020-01-04 14:07:41 +01:00
mk mk/README.md: Remove 2020-03-13 15:07:42 +01:00
perl autoconf: Allow overriding CFLAGS/CXXFLAGS from outside. 2019-07-03 04:32:25 +02:00
scripts installer: Handle edge case where the nix-daemon is already running on the system 2020-05-26 11:39:02 +02:00
src Fix PR_SET_PDEATHSIG results in Broken pipe (#2395) 2020-04-10 10:45:45 +02:00
tests function-trace: always show the trace 2020-01-05 16:30:32 +01:00
.dir-locals.el Add .dir-locals.el for Emacs 2016-01-28 11:12:04 +01:00
.editorconfig Add .editorconfig 2017-06-05 22:57:28 +01:00
.gitignore Treat plain derivation paths in context as normal paths. 2019-01-13 11:29:55 -05:00
.travis.yml Test the installer 2017-07-14 12:11:04 -04:00
.version Bump version 2020-04-10 15:05:30 +02:00
bootstrap.sh bootstrap: Simplify & make more robust. 2011-09-06 12:11:05 +00:00
configure.ac Revert 82b7f0e840, cd8bc06e87, c3db9e6f8f 2019-07-05 00:35:59 +02:00
COPYING * Change this to LGPL to keep the government happy. 2006-04-25 16:41:06 +00:00
local.mk Merge all nix-* binaries into nix 2018-10-26 12:54:00 +02:00
Makefile autoconf: Allow overriding CFLAGS/CXXFLAGS from outside. 2019-07-03 04:32:25 +02:00
Makefile.config.in Get BOOST_LDFLAGS from autoconf, fix Ubuntu 16.04 build. 2019-07-03 04:32:25 +02:00
nix.spec.in Remove world-writability from per-user directories 2019-10-09 23:57:25 +02:00
README.md Add Open Collective 2019-07-18 10:57:26 +02:00
release-common.nix Build with large config Boehm GC 2020-02-18 18:02:58 +01:00
release.nix Build with large config Boehm GC 2020-02-18 18:02:58 +01:00
shell.nix Build with large config Boehm GC 2020-02-18 18:02:58 +01:00

Open Collective supporters

Nix, the purely functional package manager

Nix is a new take on package management that is fairly unique. Because of its purity aspects, a lot of issues found in traditional package managers don't appear with Nix.

To find out more about the tool, usage and installation instructions, please read the manual, which is available on the Nix website at http://nixos.org/nix/manual.

Contributing

Take a look at the Hacking Section of the manual. It helps you to get started with building Nix from source.

License

Nix is released under the LGPL v2.1

This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit.