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* In the generation of machines.nix, support specifying a

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speed factor and multiple system types.

svn path=/nixos/trunk/; revision=17231
wip/yesman
Eelco Dolstra 15 years ago
parent bd6fbce0f3
commit 70a10c1720
1 changed files with 121 additions and 127 deletions
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  1. 248
      modules/services/misc/nix-daemon.nix

248
modules/services/misc/nix-daemon.nix
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@ -2,24 +2,27 @@
with pkgs.lib;
###### interface
let
options = {
inherit (config.environment) nix;
environment = {
in
nix = mkOption {
default = pkgs.nixUnstable;
example = pkgs.nixCustomFun /root/nix.tar.gz;
merge = mergeOneOption;
description = "
This option specifies the Nix package instance to use throughout the system.
";
};
};
{
###### interface
options = {
environment.nix = mkOption {
default = pkgs.nixUnstable;
example = pkgs.nixCustomFun /root/nix.tar.gz;
merge = mergeOneOption;
description = "
This option specifies the Nix package instance to use throughout the system.
";
};
nix = {
maxJobs = mkOption {
@ -119,135 +122,126 @@ let
example = "http://127.0.0.1:3128";
};
# Environment variables for running Nix.
# !!! Fix description.
# Environment variables for running Nix. !!! Misnomer - it's
# actually a shell script.
envVars = mkOption {
internal = true;
default = "";
merge = pkgs.lib.mergeStringOption;
description = "
Define the environment variables used by nix to
Environment variables used by Nix.
";
merge = pkgs.lib.mergeStringOption;
# other option should be used to define the content instead of using
# the apply function.
apply = conf: ''
export NIX_CONF_DIR=/nix/etc/nix
# Enable the copy-from-other-stores substituter, which allows builds
# to be sped up by copying build results from remote Nix stores. To
# do this, mount the remote file system on a subdirectory of
# /var/run/nix/remote-stores.
export NIX_OTHER_STORES=/var/run/nix/remote-stores/*/nix
'' + # */
(if config.nix.distributedBuilds then
''
export NIX_BUILD_HOOK=${config.environment.nix}/libexec/nix/build-remote.pl
export NIX_REMOTE_SYSTEMS=/etc/nix.machines
export NIX_CURRENT_LOAD=/var/run/nix/current-load
''
else "")
+
(if config.nix.proxy != "" then
''
export http_proxy=${config.nix.proxy}
export https_proxy=${config.nix.proxy}
export ftp_proxy=${config.nix.proxy}
''
else "")
+ conf;
};
};
};
in
###### implementation
###### implementation
let
inherit (config.environment) nix;
in
config = {
{
require = [
options
];
environment.etc =
[ { # Nix configuration.
source =
let
# Tricky: if we're using a chroot for builds, then we need
# /bin/sh in the chroot (our own compromise to purity).
# However, since /bin/sh is a symlink to some path in the
# Nix store, which furthermore has runtime dependencies on
# other paths in the store, we need the closure of /bin/sh
# in `build-chroot-dirs' - otherwise any builder that uses
# /bin/sh won't work.
binshDeps = pkgs.writeReferencesToFile config.system.build.binsh;
environment.etc =
[ { # Nix configuration.
source =
let
# Tricky: if we're using a chroot for builds, then we need
# /bin/sh in the chroot (our own compromise to purity).
# However, since /bin/sh is a symlink to some path in the
# Nix store, which furthermore has runtime dependencies on
# other paths in the store, we need the closure of /bin/sh
# in `build-chroot-dirs' - otherwise any builder that uses
# /bin/sh won't work.
binshDeps = pkgs.writeReferencesToFile config.system.build.binsh;
# Likewise, if chroots are turned on, we need Nix's own
# closure in the chroot. Otherwise nix-channel and nix-env
# won't work because the dependencies of its builders (like
# coreutils and Perl) aren't visible. Sigh.
nixDeps = pkgs.writeReferencesToFile config.environment.nix;
in
pkgs.runCommand "nix.conf" {extraOptions = config.nix.extraOptions; } ''
extraPaths=$(for i in $(cat ${binshDeps} ${nixDeps}); do if test -d $i; then echo $i; fi; done)
cat > $out <<END
# WARNING: this file is generated.
build-users-group = nixbld
build-max-jobs = ${toString (config.nix.maxJobs)}
build-use-chroot = ${if config.nix.useChroot then "true" else "false"}
build-chroot-dirs = /dev /dev/pts /proc /bin $(echo $extraPaths)
$extraOptions
END
'';
target = "nix.conf"; # will be symlinked from /nix/etc/nix/nix.conf in activate-configuration.sh.
}
]
++ optional config.nix.distributedBuilds
{ # List of machines for distributed Nix builds in the format expected
# by build-remote.pl.
source = pkgs.writeText "nix.machines"
(pkgs.lib.concatStrings (map (machine:
"${machine.sshUser}@${machine.hostName} ${machine.system} ${machine.sshKey} ${toString machine.maxJobs}\n"
) config.nix.buildMachines));
target = "nix.machines";
};
jobs = pkgs.lib.singleton
{ name = "nix-daemon";
# Likewise, if chroots are turned on, we need Nix's own
# closure in the chroot. Otherwise nix-channel and nix-env
# won't work because the dependencies of its builders (like
# coreutils and Perl) aren't visible. Sigh.
nixDeps = pkgs.writeReferencesToFile config.environment.nix;
in
pkgs.runCommand "nix.conf" {extraOptions = config.nix.extraOptions; } ''
extraPaths=$(for i in $(cat ${binshDeps} ${nixDeps}); do if test -d $i; then echo $i; fi; done)
cat > $out <<END
# WARNING: this file is generated.
build-users-group = nixbld
build-max-jobs = ${toString (config.nix.maxJobs)}
build-use-chroot = ${if config.nix.useChroot then "true" else "false"}
build-chroot-dirs = /dev /dev/pts /proc /bin $(echo $extraPaths)
$extraOptions
END
'';
target = "nix.conf"; # will be symlinked from /nix/etc/nix/nix.conf in activate-configuration.sh.
}
]
++ optional config.nix.distributedBuilds
{ # List of machines for distributed Nix builds in the format expected
# by build-remote.pl.
source = pkgs.writeText "nix.machines"
(pkgs.lib.concatStrings (map (machine:
"${machine.sshUser}@${machine.hostName} "
+ (if machine ? system then machine.system else concatStringsSep "," machine.systems)
+ " ${machine.sshKey} ${toString machine.maxJobs} "
+ (if machine ? speedFactor then toString machine.speedFactor else "1" )
+ "\n"
) config.nix.buildMachines));
target = "nix.machines";
};
jobs = pkgs.lib.singleton
{ name = "nix-daemon";
startOn = "startup";
script =
''
export PATH=${if config.nix.distributedBuilds then "${pkgs.openssh}/bin:${pkgs.gzip}/bin:" else ""}${pkgs.openssl}/bin:${nix}/bin:$PATH
${config.nix.envVars}
exec nice -n ${builtins.toString config.nix.daemonNiceLevel} ${nix}/bin/nix-worker --daemon > /dev/null 2>&1
'';
startOn = "startup";
extraConfig =
''
limit nofile 4096 4096
'';
};
script =
''
export PATH=${if config.nix.distributedBuilds then "${pkgs.openssh}/bin:${pkgs.gzip}/bin:" else ""}${pkgs.openssl}/bin:${nix}/bin:$PATH
${config.nix.envVars}
exec nice -n ${builtins.toString config.nix.daemonNiceLevel} ${nix}/bin/nix-worker --daemon > /dev/null 2>&1
'';
environment.shellInit =
''
# Set up the environment variables for running Nix.
${config.nix.envVars}
# Set up secure multi-user builds: non-root users build through the
# Nix daemon.
if test "$USER" != root; then
export NIX_REMOTE=daemon
else
export NIX_REMOTE=
fi
'';
nix.envVars =
''
export NIX_CONF_DIR=/nix/etc/nix
# Enable the copy-from-other-stores substituter, which allows builds
# to be sped up by copying build results from remote Nix stores. To
# do this, mount the remote file system on a subdirectory of
# /var/run/nix/remote-stores.
export NIX_OTHER_STORES=/var/run/nix/remote-stores/*/nix
''
+ optionalString config.nix.distributedBuilds ''
export NIX_BUILD_HOOK=${config.environment.nix}/libexec/nix/build-remote.pl
export NIX_REMOTE_SYSTEMS=/etc/nix.machines
export NIX_CURRENT_LOAD=/var/run/nix/current-load
''
# !!! These should not be defined here, but in some general proxy configuration module!
+ optionalString (config.nix.proxy != "") ''
export http_proxy=${config.nix.proxy}
export https_proxy=${config.nix.proxy}
export ftp_proxy=${config.nix.proxy}
'';
extraConfig =
''
limit nofile 4096 4096
'';
};
};
environment.shellInit =
''
# Set up the environment variables for running Nix.
${config.nix.envVars}
# Set up secure multi-user builds: non-root users build through the
# Nix daemon.
if test "$USER" != root; then
export NIX_REMOTE=daemon
else
export NIX_REMOTE=
fi
'';
}

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