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nixos-container: feature add 'config-file' option

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This adds a config file option to nixos-container.pl that makes it quite
a bit easier to use.
This commit is contained in:
Eric Merritt 2016-06-24 07:02:26 -07:00
parent fe8f0dbd53
commit a2feaf6d79
1 changed files with 27 additions and 7 deletions
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34
pkgs/tools/virtualization/nixos-container/nixos-container.pl
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@ -6,6 +6,7 @@ use File::Path;
use File::Slurp; use File::Slurp;
use Fcntl ':flock'; use Fcntl ':flock';
use Getopt::Long qw(:config gnu_getopt); use Getopt::Long qw(:config gnu_getopt);
use Cwd 'abs_path';
my $nsenter = "@utillinux@/bin/nsenter"; my $nsenter = "@utillinux@/bin/nsenter";
my $su = "@su@"; my $su = "@su@";
@ -18,13 +19,13 @@ umask 0022;
sub showHelp { sub showHelp {
print <<EOF; print <<EOF;
Usage: nixos-container list Usage: nixos-container list
nixos-container create <container-name> [--nixos-path <path>] [--system-path <path>] [--config <string>] [--ensure-unique-name] [--auto-start] nixos-container create <container-name> [--nixos-path <path>] [--system-path <path>] [--config-file <path>] [--config <string>] [--ensure-unique-name] [--auto-start]
nixos-container destroy <container-name> nixos-container destroy <container-name>
nixos-container start <container-name> nixos-container start <container-name>
nixos-container stop <container-name> nixos-container stop <container-name>
nixos-container kill <container-name> [--signal <signal-specifier>] nixos-container kill <container-name> [--signal <signal-specifier>]
nixos-container status <container-name> nixos-container status <container-name>
nixos-container update <container-name> [--config <string>] [--nixos-path <path>] nixos-container update <container-name> [--config <string>] [--config-file <path>]
nixos-container login <container-name> nixos-container login <container-name>
nixos-container root-login <container-name> nixos-container root-login <container-name>
nixos-container run <container-name> -- args... nixos-container run <container-name> -- args...
@ -40,6 +41,7 @@ my $ensureUniqueName = 0;
my $autoStart = 0; my $autoStart = 0;
my $extraConfig; my $extraConfig;
my $signal; my $signal;
my $configFile;
GetOptions( GetOptions(
"help" => sub { showHelp() }, "help" => sub { showHelp() },
@ -48,11 +50,16 @@ GetOptions(
"system-path=s" => \$systemPath, "system-path=s" => \$systemPath,
"signal=s" => \$signal "signal=s" => \$signal
"nixos-path=s" => \$nixosPath, "nixos-path=s" => \$nixosPath,
"config=s" => \$extraConfig "config=s" => \$extraConfig,
"config-file=s" => \$configFile
) or exit 1; ) or exit 1;
my $action = $ARGV[0] or die "$0: no action specified\n"; my $action = $ARGV[0] or die "$0: no action specified\n";
if (defined $configFile and defined $extraConfig) {
die "--config and --config-file are mutually incompatible. " .
"Please define on or the other, but not both";
}
# Execute the selected action. # Execute the selected action.
@ -73,6 +80,17 @@ $containerName =~ /^[a-zA-Z0-9\-]+$/ or die "$0: invalid container name\n";
sub writeNixOSConfig { sub writeNixOSConfig {
my ($nixosConfigFile) = @_; my ($nixosConfigFile) = @_;
my $localExtraConfig = "";
if ($extraConfig) {
$localExtraConfig = $extraConfig
} elsif ($configFile) {
my $resolvedFile = abs_path($configFile);
$localExtraConfig = "imports = [ $resolvedFile ];"
}
my $nixosConfig = <<EOF; my $nixosConfig = <<EOF;
{ config, lib, pkgs, ... }: { config, lib, pkgs, ... }:
@ -81,7 +99,7 @@ with lib;
{ boot.isContainer = true; { boot.isContainer = true;
networking.hostName = mkDefault "$containerName"; networking.hostName = mkDefault "$containerName";
networking.useDHCP = false; networking.useDHCP = false;
$extraConfig $localExtraConfig
} }
EOF EOF
@ -273,11 +291,13 @@ elsif ($action eq "update") {
# FIXME: may want to be more careful about clobbering the existing # FIXME: may want to be more careful about clobbering the existing
# configuration.nix. # configuration.nix.
writeNixOSConfig $nixosConfigFile if (defined $extraConfig && $extraConfig ne ""); if ((defined $extraConfig && $extraConfig ne "") ||
(defined $configFile && $configFile ne "")) {
writeNixOSConfig $nixosConfigFile;
}
my $nixenvF = $nixosPath // "<nixpkgs/nixos>";
system("nix-env", "-p", "$profileDir/system", system("nix-env", "-p", "$profileDir/system",
"-I", "nixos-config=$nixosConfigFile", "-f", "$nixenvF", "-I", "nixos-config=$nixosConfigFile", "-f", "<nixpkgs/nixos>",
"--set", "-A", "system") == 0 "--set", "-A", "system") == 0
or die "$0: failed to build container configuration\n"; or die "$0: failed to build container configuration\n";