Eelco Dolstra
@@ -0,0 +1,103 @@
|
||||
{ config, pkgs, lib, ... }:
|
||||
|
||||
with lib;
|
||||
|
||||
{
|
||||
|
||||
config = mkIf config.boot.isContainer {
|
||||
|
||||
# Provide a login prompt on /var/lib/login.socket. On the host,
|
||||
# you can connect to it by running ‘socat
|
||||
# unix:<path-to-container>/var/lib/login.socket -,echo=0,raw’.
|
||||
systemd.sockets.login =
|
||||
{ description = "Login Socket";
|
||||
wantedBy = [ "sockets.target" ];
|
||||
socketConfig =
|
||||
{ ListenStream = "/var/lib/login.socket";
|
||||
SocketMode = "0666";
|
||||
Accept = true;
|
||||
};
|
||||
};
|
||||
|
||||
systemd.services."login@" =
|
||||
{ description = "Login %i";
|
||||
environment.TERM = "linux";
|
||||
serviceConfig =
|
||||
{ Type = "simple";
|
||||
StandardInput = "socket";
|
||||
ExecStart = "${pkgs.socat}/bin/socat -t0 - exec:${pkgs.shadow}/bin/login,pty,setsid,setpgid,stderr,ctty";
|
||||
TimeoutStopSec = 1; # FIXME
|
||||
};
|
||||
};
|
||||
|
||||
# Also provide a root login prompt on /var/lib/root-login.socket
|
||||
# that doesn't ask for a password. This socket can only be used by
|
||||
# root on the host.
|
||||
systemd.sockets.root-login =
|
||||
{ description = "Root Login Socket";
|
||||
wantedBy = [ "sockets.target" ];
|
||||
socketConfig =
|
||||
{ ListenStream = "/var/lib/root-login.socket";
|
||||
SocketMode = "0600";
|
||||
Accept = true;
|
||||
};
|
||||
};
|
||||
|
||||
systemd.services."root-login@" =
|
||||
{ description = "Root Login %i";
|
||||
environment.TERM = "linux";
|
||||
serviceConfig =
|
||||
{ Type = "simple";
|
||||
StandardInput = "socket";
|
||||
ExecStart = "${pkgs.socat}/bin/socat -t0 - \"exec:${pkgs.shadow}/bin/login -f root,pty,setsid,setpgid,stderr,ctty\"";
|
||||
TimeoutStopSec = 1; # FIXME
|
||||
};
|
||||
};
|
||||
|
||||
# Provide a daemon on /var/lib/run-command.socket that reads a
|
||||
# command from stdin and executes it.
|
||||
systemd.sockets.run-command =
|
||||
{ description = "Run Command Socket";
|
||||
wantedBy = [ "sockets.target" ];
|
||||
socketConfig =
|
||||
{ ListenStream = "/var/lib/run-command.socket";
|
||||
SocketMode = "0600"; # only root can connect
|
||||
Accept = true;
|
||||
};
|
||||
};
|
||||
|
||||
systemd.services."run-command@" =
|
||||
{ description = "Run Command %i";
|
||||
environment.TERM = "linux";
|
||||
serviceConfig =
|
||||
{ Type = "simple";
|
||||
StandardInput = "socket";
|
||||
TimeoutStopSec = 1; # FIXME
|
||||
};
|
||||
script =
|
||||
''
|
||||
#! ${pkgs.stdenv.shell} -e
|
||||
source /etc/bashrc
|
||||
read c
|
||||
eval "command=($c)"
|
||||
exec "''${command[@]}"
|
||||
'';
|
||||
};
|
||||
|
||||
systemd.services.container-startup-done =
|
||||
{ description = "Container Startup Notification";
|
||||
wantedBy = [ "multi-user.target" ];
|
||||
after = [ "multi-user.target" ];
|
||||
script =
|
||||
''
|
||||
if [ -p /var/lib/startup-done ]; then
|
||||
echo done > /var/lib/startup-done
|
||||
fi
|
||||
'';
|
||||
serviceConfig.Type = "oneshot";
|
||||
serviceConfig.RemainAfterExit = true;
|
||||
};
|
||||
|
||||
};
|
||||
|
||||
}
|
||||
@@ -2,6 +2,29 @@
|
||||
|
||||
with pkgs.lib;
|
||||
|
||||
let
|
||||
|
||||
runInNetns = pkgs.stdenv.mkDerivation {
|
||||
name = "run-in-netns";
|
||||
unpackPhase = "true";
|
||||
buildPhase = ''
|
||||
mkdir -p $out/bin
|
||||
gcc ${./run-in-netns.c} -o $out/bin/run-in-netns
|
||||
'';
|
||||
installPhase = "true";
|
||||
};
|
||||
|
||||
nixos-container = pkgs.substituteAll {
|
||||
name = "nixos-container";
|
||||
dir = "bin";
|
||||
isExecutable = true;
|
||||
src = ./nixos-container.pl;
|
||||
perl = "${pkgs.perl}/bin/perl -I${pkgs.perlPackages.FileSlurp}/lib/perl5/site_perl";
|
||||
inherit (pkgs) socat;
|
||||
};
|
||||
|
||||
in
|
||||
|
||||
{
|
||||
options = {
|
||||
|
||||
@@ -14,19 +37,12 @@ with pkgs.lib;
|
||||
'';
|
||||
};
|
||||
|
||||
systemd.containers = mkOption {
|
||||
containers = mkOption {
|
||||
type = types.attrsOf (types.submodule (
|
||||
{ config, options, name, ... }:
|
||||
{
|
||||
options = {
|
||||
|
||||
root = mkOption {
|
||||
type = types.path;
|
||||
description = ''
|
||||
The root directory of the container.
|
||||
'';
|
||||
};
|
||||
|
||||
config = mkOption {
|
||||
description = ''
|
||||
A specification of the desired configuration of this
|
||||
@@ -45,21 +61,53 @@ with pkgs.lib;
|
||||
'';
|
||||
};
|
||||
|
||||
privateNetwork = mkOption {
|
||||
type = types.bool;
|
||||
default = false;
|
||||
description = ''
|
||||
Whether to give the container its own private virtual
|
||||
Ethernet interface. The interface is called
|
||||
<literal>eth0</literal>, and is hooked up to the interface
|
||||
<literal>c-<replaceable>container-name</replaceable></literal>
|
||||
on the host. If this option is not set, then the
|
||||
container shares the network interfaces of the host,
|
||||
and can bind to any port on any interface.
|
||||
'';
|
||||
};
|
||||
|
||||
hostAddress = mkOption {
|
||||
type = types.nullOr types.string;
|
||||
default = null;
|
||||
example = "10.231.136.1";
|
||||
description = ''
|
||||
The IPv4 address assigned to the host interface.
|
||||
'';
|
||||
};
|
||||
|
||||
localAddress = mkOption {
|
||||
type = types.nullOr types.string;
|
||||
default = null;
|
||||
example = "10.231.136.2";
|
||||
description = ''
|
||||
The IPv4 address assigned to <literal>eth0</literal>
|
||||
in the container.
|
||||
'';
|
||||
};
|
||||
|
||||
};
|
||||
|
||||
config = mkMerge
|
||||
[ { root = mkDefault "/var/lib/containers/${name}";
|
||||
}
|
||||
(mkIf options.config.isDefined {
|
||||
[ (mkIf options.config.isDefined {
|
||||
path = (import ../../lib/eval-config.nix {
|
||||
modules =
|
||||
let extraConfig =
|
||||
{ boot.isContainer = true;
|
||||
security.initialRootPassword = mkDefault "!";
|
||||
networking.hostName = mkDefault name;
|
||||
networking.useDHCP = false;
|
||||
};
|
||||
in [ extraConfig config.config ];
|
||||
prefix = [ "systemd" "containers" name ];
|
||||
prefix = [ "containers" name ];
|
||||
}).config.system.build.toplevel;
|
||||
})
|
||||
];
|
||||
@@ -69,12 +117,10 @@ with pkgs.lib;
|
||||
example = literalExample
|
||||
''
|
||||
{ webserver =
|
||||
{ root = "/containers/webserver";
|
||||
path = "/nix/var/nix/profiles/webserver";
|
||||
{ path = "/nix/var/nix/profiles/webserver";
|
||||
};
|
||||
database =
|
||||
{ root = "/containers/database";
|
||||
config =
|
||||
{ config =
|
||||
{ config, pkgs, ... }:
|
||||
{ services.postgresql.enable = true;
|
||||
services.postgresql.package = pkgs.postgresql92;
|
||||
@@ -94,29 +140,96 @@ with pkgs.lib;
|
||||
};
|
||||
|
||||
|
||||
config = {
|
||||
config = mkIf (!config.boot.isContainer) {
|
||||
|
||||
systemd.services = mapAttrs' (name: container: nameValuePair "container-${name}"
|
||||
{ description = "Container '${name}'";
|
||||
systemd.services."container@" =
|
||||
{ description = "Container '%i'";
|
||||
|
||||
wantedBy = [ "multi-user.target" ];
|
||||
unitConfig.RequiresMountsFor = [ "/var/lib/containers/%i" ];
|
||||
|
||||
unitConfig.RequiresMountsFor = [ container.root ];
|
||||
path = [ pkgs.iproute ];
|
||||
|
||||
environment.INSTANCE = "%i";
|
||||
environment.root = "/var/lib/containers/%i";
|
||||
|
||||
preStart =
|
||||
''
|
||||
mkdir -p -m 0755 ${container.root}/etc
|
||||
if ! [ -e ${container.root}/etc/os-release ]; then
|
||||
touch ${container.root}/etc/os-release
|
||||
mkdir -p -m 0755 $root/var/lib
|
||||
|
||||
# Create a named pipe to get a signal when the container
|
||||
# has finished booting.
|
||||
rm -f $root/var/lib/startup-done
|
||||
mkfifo -m 0600 $root/var/lib/startup-done
|
||||
'';
|
||||
|
||||
script =
|
||||
''
|
||||
mkdir -p -m 0755 "$root/etc" "$root/var/lib"
|
||||
if ! [ -e "$root/etc/os-release" ]; then
|
||||
touch "$root/etc/os-release"
|
||||
fi
|
||||
|
||||
mkdir -p -m 0755 \
|
||||
"/nix/var/nix/profiles/per-container/$INSTANCE" \
|
||||
"/nix/var/nix/gcroots/per-container/$INSTANCE"
|
||||
|
||||
SYSTEM_PATH=/nix/var/nix/profiles/system
|
||||
if [ -f "/etc/containers/$INSTANCE.conf" ]; then
|
||||
. "/etc/containers/$INSTANCE.conf"
|
||||
fi
|
||||
|
||||
# Cleanup from last time.
|
||||
ifaceHost=c-$INSTANCE
|
||||
ifaceCont=ctmp-$INSTANCE
|
||||
ns=net-$INSTANCE
|
||||
ip netns del $ns 2> /dev/null || true
|
||||
ip link del $ifaceHost 2> /dev/null || true
|
||||
ip link del $ifaceCont 2> /dev/null || true
|
||||
|
||||
if [ "$PRIVATE_NETWORK" = 1 ]; then
|
||||
# Create a pair of virtual ethernet devices. On the host,
|
||||
# we get ‘c-<container-name’, and on the guest, we get
|
||||
# ‘eth0’.
|
||||
ip link add $ifaceHost type veth peer name $ifaceCont
|
||||
ip netns add $ns
|
||||
ip link set $ifaceCont netns $ns
|
||||
ip netns exec $ns ip link set $ifaceCont name eth0
|
||||
ip netns exec $ns ip link set dev eth0 up
|
||||
ip link set dev $ifaceHost up
|
||||
if [ -n "$HOST_ADDRESS" ]; then
|
||||
ip addr add $HOST_ADDRESS dev $ifaceHost
|
||||
ip netns exec $ns ip route add $HOST_ADDRESS dev eth0
|
||||
ip netns exec $ns ip route add default via $HOST_ADDRESS
|
||||
fi
|
||||
if [ -n "$LOCAL_ADDRESS" ]; then
|
||||
ip netns exec $ns ip addr add $LOCAL_ADDRESS dev eth0
|
||||
ip route add $LOCAL_ADDRESS dev $ifaceHost
|
||||
fi
|
||||
runInNetNs="${runInNetns}/bin/run-in-netns $ns"
|
||||
extraFlags="--capability=CAP_NET_ADMIN"
|
||||
fi
|
||||
|
||||
exec $runInNetNs ${config.systemd.package}/bin/systemd-nspawn \
|
||||
-M "$INSTANCE" -D "/var/lib/containers/$INSTANCE" $extraFlags \
|
||||
--bind-ro=/nix/store \
|
||||
--bind-ro=/nix/var/nix/db \
|
||||
--bind-ro=/nix/var/nix/daemon-socket \
|
||||
--bind="/nix/var/nix/profiles/per-container/$INSTANCE:/nix/var/nix/profiles" \
|
||||
--bind="/nix/var/nix/gcroots/per-container/$INSTANCE:/nix/var/nix/gcroots" \
|
||||
"$SYSTEM_PATH/init"
|
||||
'';
|
||||
|
||||
serviceConfig.ExecStart =
|
||||
"${config.systemd.package}/bin/systemd-nspawn -M ${name} -D ${container.root} --bind-ro=/nix ${container.path}/init";
|
||||
postStart =
|
||||
''
|
||||
# This blocks until the container-startup-done service
|
||||
# writes something to this pipe. FIXME: it also hangs
|
||||
# until the start timeout expires if systemd-nspawn exits.
|
||||
read x < $root/var/lib/startup-done
|
||||
'';
|
||||
|
||||
preStop =
|
||||
''
|
||||
pid="$(cat /sys/fs/cgroup/systemd/machine/${name}.nspawn/system/tasks 2> /dev/null)"
|
||||
pid="$(cat /sys/fs/cgroup/systemd/machine/$INSTANCE.nspawn/system/tasks 2> /dev/null)"
|
||||
if [ -n "$pid" ]; then
|
||||
# Send the RTMIN+3 signal, which causes the container
|
||||
# systemd to start halt.target.
|
||||
@@ -131,7 +244,52 @@ with pkgs.lib;
|
||||
done
|
||||
fi
|
||||
'';
|
||||
}) config.systemd.containers;
|
||||
|
||||
restartIfChanged = false;
|
||||
#reloadIfChanged = true; # FIXME
|
||||
|
||||
serviceConfig.ExecReload = pkgs.writeScript "reload-container"
|
||||
''
|
||||
#! ${pkgs.stdenv.shell} -e
|
||||
SYSTEM_PATH=/nix/var/nix/profiles/system
|
||||
if [ -f "/etc/containers/$INSTANCE.conf" ]; then
|
||||
. "/etc/containers/$INSTANCE.conf"
|
||||
fi
|
||||
echo $SYSTEM_PATH/bin/switch-to-configuration test | \
|
||||
${pkgs.socat}/bin/socat unix:$root/var/lib/run-command.socket -
|
||||
'';
|
||||
|
||||
serviceConfig.SyslogIdentifier = "container %i";
|
||||
};
|
||||
|
||||
# Generate a configuration file in /etc/containers for each
|
||||
# container so that container@.target can get the container
|
||||
# configuration.
|
||||
environment.etc = mapAttrs' (name: cfg: nameValuePair "containers/${name}.conf"
|
||||
{ text =
|
||||
''
|
||||
SYSTEM_PATH=${cfg.path}
|
||||
${optionalString cfg.privateNetwork ''
|
||||
PRIVATE_NETWORK=1
|
||||
${optionalString (cfg.hostAddress != null) ''
|
||||
HOST_ADDRESS=${cfg.hostAddress}
|
||||
''}
|
||||
${optionalString (cfg.localAddress != null) ''
|
||||
LOCAL_ADDRESS=${cfg.localAddress}
|
||||
''}
|
||||
''}
|
||||
'';
|
||||
}) config.containers;
|
||||
|
||||
# FIXME: auto-start containers.
|
||||
|
||||
# Generate /etc/hosts entries for the containers.
|
||||
networking.extraHosts = concatStrings (mapAttrsToList (name: cfg: optionalString (cfg.localAddress != null)
|
||||
''
|
||||
${cfg.localAddress} ${name}.containers
|
||||
'') config.containers);
|
||||
|
||||
environment.systemPackages = [ nixos-container ];
|
||||
|
||||
};
|
||||
}
|
||||
|
||||
@@ -0,0 +1,238 @@
|
||||
#! @perl@
|
||||
|
||||
use strict;
|
||||
use POSIX;
|
||||
use File::Path;
|
||||
use File::Slurp;
|
||||
use Fcntl ':flock';
|
||||
use Getopt::Long qw(:config gnu_getopt);
|
||||
|
||||
my $socat = '@socat@/bin/socat';
|
||||
|
||||
# Parse the command line.
|
||||
|
||||
sub showHelp {
|
||||
print <<EOF;
|
||||
Usage: nixos-container list
|
||||
nixos-container create <container-name> [--config <string>] [--ensure-unique-name]
|
||||
nixos-container destroy <container-name>
|
||||
nixos-container start <container-name>
|
||||
nixos-container stop <container-name>
|
||||
nixos-container login <container-name>
|
||||
nixos-container root-login <container-name>
|
||||
nixos-container run <container-name> -- args...
|
||||
nixos-container set-root-password <container-name> <password>
|
||||
nixos-container show-ip <container-name>
|
||||
EOF
|
||||
exit 0;
|
||||
}
|
||||
|
||||
my $ensureUniqueName = 0;
|
||||
my $extraConfig = "";
|
||||
|
||||
GetOptions(
|
||||
"help" => sub { showHelp() },
|
||||
"ensure-unique-name" => \$ensureUniqueName,
|
||||
"config=s" => \$extraConfig
|
||||
) or exit 1;
|
||||
|
||||
my $action = $ARGV[0] or die "$0: no action specified\n";
|
||||
|
||||
|
||||
# Execute the selected action.
|
||||
|
||||
mkpath("/etc/containers", 0, 0755);
|
||||
mkpath("/var/lib/containers", 0, 0700);
|
||||
|
||||
if ($action eq "list") {
|
||||
foreach my $confFile (glob "/etc/containers/*.conf") {
|
||||
$confFile =~ /\/([^\/]+).conf$/ or next;
|
||||
print "$1\n";
|
||||
}
|
||||
exit 0;
|
||||
}
|
||||
|
||||
my $containerName = $ARGV[1] or die "$0: no container name specified\n";
|
||||
$containerName =~ /^[a-zA-Z0-9\-]+$/ or die "$0: invalid container name\n";
|
||||
|
||||
sub writeNixOSConfig {
|
||||
my ($nixosConfigFile) = @_;
|
||||
|
||||
my $nixosConfig = <<EOF;
|
||||
{ config, pkgs, ... }:
|
||||
|
||||
with pkgs.lib;
|
||||
|
||||
{ boot.isContainer = true;
|
||||
security.initialRootPassword = mkDefault "!";
|
||||
networking.hostName = mkDefault "$containerName";
|
||||
networking.useDHCP = false;
|
||||
$extraConfig
|
||||
}
|
||||
EOF
|
||||
|
||||
write_file($nixosConfigFile, $nixosConfig);
|
||||
}
|
||||
|
||||
if ($action eq "create") {
|
||||
# Acquire an exclusive lock to prevent races with other
|
||||
# invocations of ‘nixos-container create’.
|
||||
my $lockFN = "/run/lock/nixos-container";
|
||||
open(my $lock, '>>', $lockFN) or die "$0: opening $lockFN: $!";
|
||||
flock($lock, LOCK_EX) or die "$0: could not lock $lockFN: $!";
|
||||
|
||||
my $confFile = "/etc/containers/$containerName.conf";
|
||||
my $root = "/var/lib/containers/$containerName";
|
||||
|
||||
# Maybe generate a unique name.
|
||||
if ($ensureUniqueName) {
|
||||
my $base = $containerName;
|
||||
for (my $nr = 0; ; $nr++) {
|
||||
$containerName = "$base-$nr";
|
||||
$confFile = "/etc/containers/$containerName.conf";
|
||||
$root = "/var/lib/containers/$containerName";
|
||||
last unless -e $confFile || -e $root;
|
||||
}
|
||||
}
|
||||
|
||||
die "$0: container ‘$containerName’ already exists\n" if -e $confFile;
|
||||
|
||||
# Get an unused IP address.
|
||||
my %usedIPs;
|
||||
foreach my $confFile2 (glob "/etc/containers/*.conf") {
|
||||
my $s = read_file($confFile2) or die;
|
||||
$usedIPs{$1} = 1 if $s =~ /^HOST_ADDRESS=([0-9\.]+)$/m;
|
||||
$usedIPs{$1} = 1 if $s =~ /^LOCAL_ADDRESS=([0-9\.]+)$/m;
|
||||
}
|
||||
|
||||
my ($ipPrefix, $hostAddress, $localAddress);
|
||||
for (my $nr = 1; $nr < 255; $nr++) {
|
||||
$ipPrefix = "10.233.$nr";
|
||||
$hostAddress = "$ipPrefix.1";
|
||||
$localAddress = "$ipPrefix.2";
|
||||
last unless $usedIPs{$hostAddress} || $usedIPs{$localAddress};
|
||||
$ipPrefix = undef;
|
||||
}
|
||||
|
||||
die "$0: out of IP addresses\n" unless defined $ipPrefix;
|
||||
|
||||
my @conf;
|
||||
push @conf, "PRIVATE_NETWORK=1\n";
|
||||
push @conf, "HOST_ADDRESS=$hostAddress\n";
|
||||
push @conf, "LOCAL_ADDRESS=$localAddress\n";
|
||||
write_file($confFile, \@conf);
|
||||
|
||||
close($lock);
|
||||
|
||||
print STDERR "host IP is $hostAddress, container IP is $localAddress\n";
|
||||
|
||||
mkpath("$root/etc/nixos", 0, 0755);
|
||||
|
||||
my $nixosConfigFile = "$root/etc/nixos/configuration.nix";
|
||||
writeNixOSConfig $nixosConfigFile;
|
||||
|
||||
# The per-container directory is restricted to prevent users on
|
||||
# the host from messing with guest users who happen to have the
|
||||
# same uid.
|
||||
my $profileDir = "/nix/var/nix/profiles/per-container";
|
||||
mkpath($profileDir, 0, 0700);
|
||||
$profileDir = "$profileDir/$containerName";
|
||||
mkpath($profileDir, 0, 0755);
|
||||
|
||||
system("nix-env", "-p", "$profileDir/system",
|
||||
"-I", "nixos-config=$nixosConfigFile", "-f", "<nixpkgs/nixos>",
|
||||
"--set", "-A", "system") == 0
|
||||
or die "$0: failed to build initial container configuration\n";
|
||||
|
||||
print "$containerName\n" if $ensureUniqueName;
|
||||
exit 0;
|
||||
}
|
||||
|
||||
my $root = "/var/lib/containers/$containerName";
|
||||
my $profileDir = "/nix/var/nix/profiles/per-container/$containerName";
|
||||
my $confFile = "/etc/containers/$containerName.conf";
|
||||
die "$0: container ‘$containerName’ does not exist\n" if !-e $confFile;
|
||||
|
||||
sub isContainerRunning {
|
||||
my $status = `systemctl show 'container\@$containerName'`;
|
||||
return $status =~ /ActiveState=active/;
|
||||
}
|
||||
|
||||
sub stopContainer {
|
||||
system("systemctl", "stop", "container\@$containerName") == 0
|
||||
or die "$0: failed to stop container\n";
|
||||
}
|
||||
|
||||
if ($action eq "destroy") {
|
||||
die "$0: cannot destroy declarative container (remove it from your configuration.nix instead)\n"
|
||||
unless POSIX::access($confFile, &POSIX::W_OK);
|
||||
|
||||
stopContainer if isContainerRunning;
|
||||
|
||||
rmtree($profileDir) if -e $profileDir;
|
||||
rmtree($root) if -e $root;
|
||||
unlink($confFile) or die;
|
||||
}
|
||||
|
||||
elsif ($action eq "start") {
|
||||
system("systemctl", "start", "container\@$containerName") == 0
|
||||
or die "$0: failed to start container\n";
|
||||
}
|
||||
|
||||
elsif ($action eq "stop") {
|
||||
stopContainer;
|
||||
}
|
||||
|
||||
elsif ($action eq "update") {
|
||||
my $nixosConfigFile = "$root/etc/nixos/configuration.nix";
|
||||
|
||||
# FIXME: may want to be more careful about clobbering the existing
|
||||
# configuration.nix.
|
||||
writeNixOSConfig $nixosConfigFile if defined $extraConfig;
|
||||
|
||||
system("nix-env", "-p", "$profileDir/system",
|
||||
"-I", "nixos-config=$nixosConfigFile", "-f", "<nixpkgs/nixos>",
|
||||
"--set", "-A", "system") == 0
|
||||
or die "$0: failed to build container configuration\n";
|
||||
|
||||
if (isContainerRunning) {
|
||||
print STDERR "reloading container...\n";
|
||||
system("systemctl", "reload", "container\@$containerName") == 0
|
||||
or die "$0: failed to reload container\n";
|
||||
}
|
||||
}
|
||||
|
||||
elsif ($action eq "login") {
|
||||
exec($socat, "unix:$root/var/lib/login.socket", "-,echo=0,raw");
|
||||
}
|
||||
|
||||
elsif ($action eq "root-login") {
|
||||
exec($socat, "unix:$root/var/lib/root-login.socket", "-,echo=0,raw");
|
||||
}
|
||||
|
||||
elsif ($action eq "run") {
|
||||
shift @ARGV; shift @ARGV;
|
||||
open(SOCAT, "|-", $socat, "unix:$root/var/lib/run-command.socket", "-");
|
||||
print SOCAT join(' ', map { "'$_'" } @ARGV), "\n";
|
||||
close(SOCAT);
|
||||
}
|
||||
|
||||
elsif ($action eq "set-root-password") {
|
||||
# FIXME: don't get password from the command line.
|
||||
my $password = $ARGV[2] or die "$0: no password given\n";
|
||||
open(SOCAT, "|-", $socat, "unix:$root/var/lib/run-command.socket", "-");
|
||||
print SOCAT "passwd\n";
|
||||
print SOCAT "$password\n";
|
||||
print SOCAT "$password\n";
|
||||
close(SOCAT);
|
||||
}
|
||||
|
||||
elsif ($action eq "show-ip") {
|
||||
my $s = read_file($confFile) or die;
|
||||
$s =~ /^LOCAL_ADDRESS=([0-9\.]+)$/m or die "$0: cannot get IP address\n";
|
||||
print "$1\n";
|
||||
}
|
||||
|
||||
else {
|
||||
die "$0: unknown action ‘$action’\n";
|
||||
}
|
||||
@@ -0,0 +1,50 @@
|
||||
#define _GNU_SOURCE
|
||||
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include <errno.h>
|
||||
|
||||
#include <unistd.h>
|
||||
#include <sched.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <sys/mount.h>
|
||||
#include <fcntl.h>
|
||||
#include <linux/limits.h>
|
||||
|
||||
int main(int argc, char * * argv)
|
||||
{
|
||||
if (argc < 3) {
|
||||
fprintf(stderr, "%s: missing arguments\n", argv[0]);
|
||||
return 1;
|
||||
}
|
||||
|
||||
char nsPath[PATH_MAX];
|
||||
|
||||
sprintf(nsPath, "/run/netns/%s", argv[1]);
|
||||
|
||||
int fd = open(nsPath, O_RDONLY);
|
||||
if (fd == -1) {
|
||||
fprintf(stderr, "%s: opening network namespace: %s\n", argv[0], strerror(errno));
|
||||
return 1;
|
||||
}
|
||||
|
||||
if (setns(fd, CLONE_NEWNET) == -1) {
|
||||
fprintf(stderr, "%s: setting network namespace: %s\n", argv[0], strerror(errno));
|
||||
return 1;
|
||||
}
|
||||
|
||||
umount2(nsPath, MNT_DETACH);
|
||||
if (unlink(nsPath) == -1) {
|
||||
fprintf(stderr, "%s: unlinking network namespace: %s\n", argv[0], strerror(errno));
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* FIXME: Remount /sys so that /sys/class/net reflects the
|
||||
interfaces visible in the network namespace. This requires
|
||||
bind-mounting /sys/fs/cgroups etc. */
|
||||
|
||||
execv(argv[2], argv + 2);
|
||||
fprintf(stderr, "%s: running command: %s\n", argv[0], strerror(errno));
|
||||
return 1;
|
||||
}
|
||||
Reference in New Issue
Block a user