forked from mirrors/nixpkgs
773 lines
25 KiB
Nix
773 lines
25 KiB
Nix
{ config, lib, pkgs, ... }:
|
|
|
|
with lib;
|
|
|
|
let
|
|
|
|
# The container's init script, a small wrapper around the regular
|
|
# NixOS stage-2 init script.
|
|
containerInit = (cfg:
|
|
let
|
|
renderExtraVeth = (name: cfg:
|
|
''
|
|
echo "Bringing ${name} up"
|
|
ip link set dev ${name} up
|
|
${optionalString (cfg.localAddress != null) ''
|
|
echo "Setting ip for ${name}"
|
|
ip addr add ${cfg.localAddress} dev ${name}
|
|
''}
|
|
${optionalString (cfg.localAddress6 != null) ''
|
|
echo "Setting ip6 for ${name}"
|
|
ip -6 addr add ${cfg.localAddress6} dev ${name}
|
|
''}
|
|
${optionalString (cfg.hostAddress != null) ''
|
|
echo "Setting route to host for ${name}"
|
|
ip route add ${cfg.hostAddress} dev ${name}
|
|
''}
|
|
${optionalString (cfg.hostAddress6 != null) ''
|
|
echo "Setting route6 to host for ${name}"
|
|
ip -6 route add ${cfg.hostAddress6} dev ${name}
|
|
''}
|
|
''
|
|
);
|
|
in
|
|
pkgs.writeScript "container-init"
|
|
''
|
|
#! ${pkgs.runtimeShell} -e
|
|
|
|
# Initialise the container side of the veth pair.
|
|
if [ -n "$HOST_ADDRESS" ] || [ -n "$LOCAL_ADDRESS" ] || [ -n "$HOST_BRIDGE" ]; then
|
|
|
|
ip link set host0 name eth0
|
|
ip link set dev eth0 up
|
|
|
|
if [ -n "$LOCAL_ADDRESS" ]; then
|
|
ip addr add $LOCAL_ADDRESS dev eth0
|
|
fi
|
|
if [ -n "$LOCAL_ADDRESS6" ]; then
|
|
ip -6 addr add $LOCAL_ADDRESS6 dev eth0
|
|
fi
|
|
if [ -n "$HOST_ADDRESS" ]; then
|
|
ip route add $HOST_ADDRESS dev eth0
|
|
ip route add default via $HOST_ADDRESS
|
|
fi
|
|
if [ -n "$HOST_ADDRESS6" ]; then
|
|
ip -6 route add $HOST_ADDRESS6 dev eth0
|
|
ip -6 route add default via $HOST_ADDRESS6
|
|
fi
|
|
|
|
${concatStringsSep "\n" (mapAttrsToList renderExtraVeth cfg.extraVeths)}
|
|
fi
|
|
|
|
# Start the regular stage 1 script.
|
|
exec "$1"
|
|
''
|
|
);
|
|
|
|
nspawnExtraVethArgs = (name: cfg: "--network-veth-extra=${name}");
|
|
|
|
startScript = cfg:
|
|
''
|
|
mkdir -p -m 0755 "$root/etc" "$root/var/lib"
|
|
mkdir -p -m 0700 "$root/var/lib/private" "$root/root" /run/containers
|
|
if ! [ -e "$root/etc/os-release" ]; then
|
|
touch "$root/etc/os-release"
|
|
fi
|
|
|
|
if ! [ -e "$root/etc/machine-id" ]; then
|
|
touch "$root/etc/machine-id"
|
|
fi
|
|
|
|
mkdir -p -m 0755 \
|
|
"/nix/var/nix/profiles/per-container/$INSTANCE" \
|
|
"/nix/var/nix/gcroots/per-container/$INSTANCE"
|
|
|
|
cp --remove-destination /etc/resolv.conf "$root/etc/resolv.conf"
|
|
|
|
if [ "$PRIVATE_NETWORK" = 1 ]; then
|
|
extraFlags+=" --private-network"
|
|
fi
|
|
|
|
if [ -n "$HOST_ADDRESS" ] || [ -n "$LOCAL_ADDRESS" ]; then
|
|
extraFlags+=" --network-veth"
|
|
fi
|
|
|
|
if [ -n "$HOST_PORT" ]; then
|
|
OIFS=$IFS
|
|
IFS=","
|
|
for i in $HOST_PORT
|
|
do
|
|
extraFlags+=" --port=$i"
|
|
done
|
|
IFS=$OIFS
|
|
fi
|
|
|
|
if [ -n "$HOST_BRIDGE" ]; then
|
|
extraFlags+=" --network-bridge=$HOST_BRIDGE"
|
|
fi
|
|
|
|
extraFlags+=" ${concatStringsSep " " (mapAttrsToList nspawnExtraVethArgs cfg.extraVeths)}"
|
|
|
|
for iface in $INTERFACES; do
|
|
extraFlags+=" --network-interface=$iface"
|
|
done
|
|
|
|
for iface in $MACVLANS; do
|
|
extraFlags+=" --network-macvlan=$iface"
|
|
done
|
|
|
|
# If the host is 64-bit and the container is 32-bit, add a
|
|
# --personality flag.
|
|
${optionalString (config.nixpkgs.localSystem.system == "x86_64-linux") ''
|
|
if [ "$(< ''${SYSTEM_PATH:-/nix/var/nix/profiles/per-container/$INSTANCE/system}/system)" = i686-linux ]; then
|
|
extraFlags+=" --personality=x86"
|
|
fi
|
|
''}
|
|
|
|
# Run systemd-nspawn without startup notification (we'll
|
|
# wait for the container systemd to signal readiness).
|
|
exec ${config.systemd.package}/bin/systemd-nspawn \
|
|
--keep-unit \
|
|
-M "$INSTANCE" -D "$root" $extraFlags \
|
|
$EXTRA_NSPAWN_FLAGS \
|
|
--notify-ready=yes \
|
|
--bind-ro=/nix/store \
|
|
--bind-ro=/nix/var/nix/db \
|
|
--bind-ro=/nix/var/nix/daemon-socket \
|
|
--bind="/nix/var/nix/profiles/per-container/$INSTANCE:/nix/var/nix/profiles" \
|
|
--bind="/nix/var/nix/gcroots/per-container/$INSTANCE:/nix/var/nix/gcroots" \
|
|
--link-journal=try-guest \
|
|
--setenv PRIVATE_NETWORK="$PRIVATE_NETWORK" \
|
|
--setenv HOST_BRIDGE="$HOST_BRIDGE" \
|
|
--setenv HOST_ADDRESS="$HOST_ADDRESS" \
|
|
--setenv LOCAL_ADDRESS="$LOCAL_ADDRESS" \
|
|
--setenv HOST_ADDRESS6="$HOST_ADDRESS6" \
|
|
--setenv LOCAL_ADDRESS6="$LOCAL_ADDRESS6" \
|
|
--setenv HOST_PORT="$HOST_PORT" \
|
|
--setenv PATH="$PATH" \
|
|
${if cfg.additionalCapabilities != null && cfg.additionalCapabilities != [] then
|
|
''--capability="${concatStringsSep " " cfg.additionalCapabilities}"'' else ""
|
|
} \
|
|
${if cfg.tmpfs != null && cfg.tmpfs != [] then
|
|
''--tmpfs=${concatStringsSep " --tmpfs=" cfg.tmpfs}'' else ""
|
|
} \
|
|
${containerInit cfg} "''${SYSTEM_PATH:-/nix/var/nix/profiles/system}/init"
|
|
'';
|
|
|
|
preStartScript = cfg:
|
|
''
|
|
# Clean up existing machined registration and interfaces.
|
|
machinectl terminate "$INSTANCE" 2> /dev/null || true
|
|
|
|
if [ -n "$HOST_ADDRESS" ] || [ -n "$LOCAL_ADDRESS" ]; then
|
|
ip link del dev "ve-$INSTANCE" 2> /dev/null || true
|
|
ip link del dev "vb-$INSTANCE" 2> /dev/null || true
|
|
fi
|
|
|
|
${concatStringsSep "\n" (
|
|
mapAttrsToList (name: cfg:
|
|
''ip link del dev ${name} 2> /dev/null || true ''
|
|
) cfg.extraVeths
|
|
)}
|
|
'';
|
|
|
|
postStartScript = (cfg:
|
|
let
|
|
ipcall = cfg: ipcmd: variable: attribute:
|
|
if cfg.${attribute} == null then
|
|
''
|
|
if [ -n "${variable}" ]; then
|
|
${ipcmd} add ${variable} dev $ifaceHost
|
|
fi
|
|
''
|
|
else
|
|
''${ipcmd} add ${cfg.${attribute}} dev $ifaceHost'';
|
|
renderExtraVeth = name: cfg:
|
|
if cfg.hostBridge != null then
|
|
''
|
|
# Add ${name} to bridge ${cfg.hostBridge}
|
|
ip link set dev ${name} master ${cfg.hostBridge} up
|
|
''
|
|
else
|
|
''
|
|
echo "Bring ${name} up"
|
|
ip link set dev ${name} up
|
|
# Set IPs and routes for ${name}
|
|
${optionalString (cfg.hostAddress != null) ''
|
|
ip addr add ${cfg.hostAddress} dev ${name}
|
|
''}
|
|
${optionalString (cfg.hostAddress6 != null) ''
|
|
ip -6 addr add ${cfg.hostAddress6} dev ${name}
|
|
''}
|
|
${optionalString (cfg.localAddress != null) ''
|
|
ip route add ${cfg.localAddress} dev ${name}
|
|
''}
|
|
${optionalString (cfg.localAddress6 != null) ''
|
|
ip -6 route add ${cfg.localAddress6} dev ${name}
|
|
''}
|
|
'';
|
|
in
|
|
''
|
|
if [ -n "$HOST_ADDRESS" ] || [ -n "$LOCAL_ADDRESS" ]; then
|
|
if [ -z "$HOST_BRIDGE" ]; then
|
|
ifaceHost=ve-$INSTANCE
|
|
ip link set dev $ifaceHost up
|
|
|
|
${ipcall cfg "ip addr" "$HOST_ADDRESS" "hostAddress"}
|
|
${ipcall cfg "ip -6 addr" "$HOST_ADDRESS6" "hostAddress6"}
|
|
${ipcall cfg "ip route" "$LOCAL_ADDRESS" "localAddress"}
|
|
${ipcall cfg "ip -6 route" "$LOCAL_ADDRESS6" "localAddress6"}
|
|
fi
|
|
${concatStringsSep "\n" (mapAttrsToList renderExtraVeth cfg.extraVeths)}
|
|
fi
|
|
|
|
# Get the leader PID so that we can signal it in
|
|
# preStop. We can't use machinectl there because D-Bus
|
|
# might be shutting down. FIXME: in systemd 219 we can
|
|
# just signal systemd-nspawn to do a clean shutdown.
|
|
machinectl show "$INSTANCE" | sed 's/Leader=\(.*\)/\1/;t;d' > "/run/containers/$INSTANCE.pid"
|
|
''
|
|
);
|
|
|
|
serviceDirectives = cfg: {
|
|
ExecReload = pkgs.writeScript "reload-container"
|
|
''
|
|
#! ${pkgs.runtimeShell} -e
|
|
${pkgs.nixos-container}/bin/nixos-container run "$INSTANCE" -- \
|
|
bash --login -c "''${SYSTEM_PATH:-/nix/var/nix/profiles/system}/bin/switch-to-configuration test"
|
|
'';
|
|
|
|
SyslogIdentifier = "container %i";
|
|
|
|
EnvironmentFile = "-/etc/containers/%i.conf";
|
|
|
|
Type = "notify";
|
|
|
|
# Note that on reboot, systemd-nspawn returns 133, so this
|
|
# unit will be restarted. On poweroff, it returns 0, so the
|
|
# unit won't be restarted.
|
|
RestartForceExitStatus = "133";
|
|
SuccessExitStatus = "133";
|
|
|
|
Restart = "on-failure";
|
|
|
|
Slice = "machine.slice";
|
|
Delegate = true;
|
|
|
|
# Hack: we don't want to kill systemd-nspawn, since we call
|
|
# "machinectl poweroff" in preStop to shut down the
|
|
# container cleanly. But systemd requires sending a signal
|
|
# (at least if we want remaining processes to be killed
|
|
# after the timeout). So send an ignored signal.
|
|
KillMode = "mixed";
|
|
KillSignal = "WINCH";
|
|
|
|
DevicePolicy = "closed";
|
|
DeviceAllow = map (d: "${d.node} ${d.modifier}") cfg.allowedDevices;
|
|
};
|
|
|
|
|
|
system = config.nixpkgs.localSystem.system;
|
|
|
|
bindMountOpts = { name, ... }: {
|
|
|
|
options = {
|
|
mountPoint = mkOption {
|
|
example = "/mnt/usb";
|
|
type = types.str;
|
|
description = "Mount point on the container file system.";
|
|
};
|
|
hostPath = mkOption {
|
|
default = null;
|
|
example = "/home/alice";
|
|
type = types.nullOr types.str;
|
|
description = "Location of the host path to be mounted.";
|
|
};
|
|
isReadOnly = mkOption {
|
|
default = true;
|
|
type = types.bool;
|
|
description = "Determine whether the mounted path will be accessed in read-only mode.";
|
|
};
|
|
};
|
|
|
|
config = {
|
|
mountPoint = mkDefault name;
|
|
};
|
|
|
|
};
|
|
|
|
allowedDeviceOpts = { ... }: {
|
|
options = {
|
|
node = mkOption {
|
|
example = "/dev/net/tun";
|
|
type = types.str;
|
|
description = "Path to device node";
|
|
};
|
|
modifier = mkOption {
|
|
example = "rw";
|
|
type = types.str;
|
|
description = ''
|
|
Device node access modifier. Takes a combination
|
|
<literal>r</literal> (read), <literal>w</literal> (write), and
|
|
<literal>m</literal> (mknod). See the
|
|
<literal>systemd.resource-control(5)</literal> man page for more
|
|
information.'';
|
|
};
|
|
};
|
|
};
|
|
|
|
|
|
mkBindFlag = d:
|
|
let flagPrefix = if d.isReadOnly then " --bind-ro=" else " --bind=";
|
|
mountstr = if d.hostPath != null then "${d.hostPath}:${d.mountPoint}" else "${d.mountPoint}";
|
|
in flagPrefix + mountstr ;
|
|
|
|
mkBindFlags = bs: concatMapStrings mkBindFlag (lib.attrValues bs);
|
|
|
|
networkOptions = {
|
|
hostBridge = mkOption {
|
|
type = types.nullOr types.string;
|
|
default = null;
|
|
example = "br0";
|
|
description = ''
|
|
Put the host-side of the veth-pair into the named bridge.
|
|
Only one of hostAddress* or hostBridge can be given.
|
|
'';
|
|
};
|
|
|
|
forwardPorts = mkOption {
|
|
type = types.listOf (types.submodule {
|
|
options = {
|
|
protocol = mkOption {
|
|
type = types.str;
|
|
default = "tcp";
|
|
description = "The protocol specifier for port forwarding between host and container";
|
|
};
|
|
hostPort = mkOption {
|
|
type = types.int;
|
|
description = "Source port of the external interface on host";
|
|
};
|
|
containerPort = mkOption {
|
|
type = types.nullOr types.int;
|
|
default = null;
|
|
description = "Target port of container";
|
|
};
|
|
};
|
|
});
|
|
default = [];
|
|
example = [ { protocol = "tcp"; hostPort = 8080; containerPort = 80; } ];
|
|
description = ''
|
|
List of forwarded ports from host to container. Each forwarded port
|
|
is specified by protocol, hostPort and containerPort. By default,
|
|
protocol is tcp and hostPort and containerPort are assumed to be
|
|
the same if containerPort is not explicitly given.
|
|
'';
|
|
};
|
|
|
|
|
|
hostAddress = mkOption {
|
|
type = types.nullOr types.str;
|
|
default = null;
|
|
example = "10.231.136.1";
|
|
description = ''
|
|
The IPv4 address assigned to the host interface.
|
|
(Not used when hostBridge is set.)
|
|
'';
|
|
};
|
|
|
|
hostAddress6 = mkOption {
|
|
type = types.nullOr types.string;
|
|
default = null;
|
|
example = "fc00::1";
|
|
description = ''
|
|
The IPv6 address assigned to the host interface.
|
|
(Not used when hostBridge is set.)
|
|
'';
|
|
};
|
|
|
|
localAddress = mkOption {
|
|
type = types.nullOr types.str;
|
|
default = null;
|
|
example = "10.231.136.2";
|
|
description = ''
|
|
The IPv4 address assigned to the interface in the container.
|
|
If a hostBridge is used, this should be given with netmask to access
|
|
the whole network. Otherwise the default netmask is /32 and routing is
|
|
set up from localAddress to hostAddress and back.
|
|
'';
|
|
};
|
|
|
|
localAddress6 = mkOption {
|
|
type = types.nullOr types.string;
|
|
default = null;
|
|
example = "fc00::2";
|
|
description = ''
|
|
The IPv6 address assigned to the interface in the container.
|
|
If a hostBridge is used, this should be given with netmask to access
|
|
the whole network. Otherwise the default netmask is /128 and routing is
|
|
set up from localAddress6 to hostAddress6 and back.
|
|
'';
|
|
};
|
|
|
|
};
|
|
|
|
dummyConfig =
|
|
{
|
|
extraVeths = {};
|
|
additionalCapabilities = [];
|
|
allowedDevices = [];
|
|
hostAddress = null;
|
|
hostAddress6 = null;
|
|
localAddress = null;
|
|
localAddress6 = null;
|
|
tmpfs = null;
|
|
};
|
|
|
|
in
|
|
|
|
{
|
|
options = {
|
|
|
|
boot.isContainer = mkOption {
|
|
type = types.bool;
|
|
default = false;
|
|
description = ''
|
|
Whether this NixOS machine is a lightweight container running
|
|
in another NixOS system.
|
|
'';
|
|
};
|
|
|
|
boot.enableContainers = mkOption {
|
|
type = types.bool;
|
|
default = !config.boot.isContainer;
|
|
description = ''
|
|
Whether to enable support for nixos containers.
|
|
'';
|
|
};
|
|
|
|
containers = mkOption {
|
|
type = types.attrsOf (types.submodule (
|
|
{ config, options, name, ... }:
|
|
{
|
|
options = {
|
|
|
|
config = mkOption {
|
|
description = ''
|
|
A specification of the desired configuration of this
|
|
container, as a NixOS module.
|
|
'';
|
|
type = lib.mkOptionType {
|
|
name = "Toplevel NixOS config";
|
|
merge = loc: defs: (import ../../lib/eval-config.nix {
|
|
inherit system;
|
|
modules =
|
|
let extraConfig =
|
|
{ boot.isContainer = true;
|
|
networking.hostName = mkDefault name;
|
|
networking.useDHCP = false;
|
|
assertions = [
|
|
{
|
|
assertion = config.privateNetwork -> stringLength name < 12;
|
|
message = ''
|
|
Container name `${name}` is too long: When `privateNetwork` is enabled, container names can
|
|
not be longer than 11 characters, because the container's interface name is derived from it.
|
|
This might be fixed in the future. See https://github.com/NixOS/nixpkgs/issues/38509
|
|
'';
|
|
}
|
|
];
|
|
};
|
|
in [ extraConfig ] ++ (map (x: x.value) defs);
|
|
prefix = [ "containers" name ];
|
|
}).config;
|
|
};
|
|
};
|
|
|
|
path = mkOption {
|
|
type = types.path;
|
|
example = "/nix/var/nix/profiles/containers/webserver";
|
|
description = ''
|
|
As an alternative to specifying
|
|
<option>config</option>, you can specify the path to
|
|
the evaluated NixOS system configuration, typically a
|
|
symlink to a system profile.
|
|
'';
|
|
};
|
|
|
|
additionalCapabilities = mkOption {
|
|
type = types.listOf types.str;
|
|
default = [];
|
|
example = [ "CAP_NET_ADMIN" "CAP_MKNOD" ];
|
|
description = ''
|
|
Grant additional capabilities to the container. See the
|
|
capabilities(7) and systemd-nspawn(1) man pages for more
|
|
information.
|
|
'';
|
|
};
|
|
enableTun = mkOption {
|
|
type = types.bool;
|
|
default = false;
|
|
description = ''
|
|
Allows the container to create and setup tunnel interfaces
|
|
by granting the <literal>NET_ADMIN</literal> capability and
|
|
enabling access to <literal>/dev/net/tun</literal>.
|
|
'';
|
|
};
|
|
|
|
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>ve-<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.
|
|
'';
|
|
};
|
|
|
|
interfaces = mkOption {
|
|
type = types.listOf types.string;
|
|
default = [];
|
|
example = [ "eth1" "eth2" ];
|
|
description = ''
|
|
The list of interfaces to be moved into the container.
|
|
'';
|
|
};
|
|
|
|
macvlans = mkOption {
|
|
type = types.listOf types.str;
|
|
default = [];
|
|
example = [ "eth1" "eth2" ];
|
|
description = ''
|
|
The list of host interfaces from which macvlans will be
|
|
created. For each interface specified, a macvlan interface
|
|
will be created and moved to the container.
|
|
'';
|
|
};
|
|
|
|
extraVeths = mkOption {
|
|
type = with types; attrsOf (submodule { options = networkOptions; });
|
|
default = {};
|
|
description = ''
|
|
Extra veth-pairs to be created for the container
|
|
'';
|
|
};
|
|
|
|
autoStart = mkOption {
|
|
type = types.bool;
|
|
default = false;
|
|
description = ''
|
|
Whether the container is automatically started at boot-time.
|
|
'';
|
|
};
|
|
|
|
bindMounts = mkOption {
|
|
type = with types; loaOf (submodule bindMountOpts);
|
|
default = {};
|
|
example = { "/home" = { hostPath = "/home/alice";
|
|
isReadOnly = false; };
|
|
};
|
|
|
|
description =
|
|
''
|
|
An extra list of directories that is bound to the container.
|
|
'';
|
|
};
|
|
|
|
allowedDevices = mkOption {
|
|
type = with types; listOf (submodule allowedDeviceOpts);
|
|
default = [];
|
|
example = [ { node = "/dev/net/tun"; modifier = "rw"; } ];
|
|
description = ''
|
|
A list of device nodes to which the containers has access to.
|
|
'';
|
|
};
|
|
|
|
tmpfs = mkOption {
|
|
type = types.listOf types.str;
|
|
default = [];
|
|
example = [ "/var" ];
|
|
description = ''
|
|
Mounts a set of tmpfs file systems into the container.
|
|
Multiple paths can be specified.
|
|
Valid items must conform to the --tmpfs argument
|
|
of systemd-nspawn. See systemd-nspawn(1) for details.
|
|
'';
|
|
};
|
|
|
|
extraFlags = mkOption {
|
|
type = types.listOf types.str;
|
|
default = [];
|
|
example = [ "--drop-capability=CAP_SYS_CHROOT" ];
|
|
description = ''
|
|
Extra flags passed to the systemd-nspawn command.
|
|
See systemd-nspawn(1) for details.
|
|
'';
|
|
};
|
|
|
|
} // networkOptions;
|
|
|
|
config = mkMerge
|
|
[
|
|
(mkIf options.config.isDefined {
|
|
path = config.config.system.build.toplevel;
|
|
})
|
|
];
|
|
}));
|
|
|
|
default = {};
|
|
example = literalExample
|
|
''
|
|
{ webserver =
|
|
{ path = "/nix/var/nix/profiles/webserver";
|
|
};
|
|
database =
|
|
{ config =
|
|
{ config, pkgs, ... }:
|
|
{ services.postgresql.enable = true;
|
|
services.postgresql.package = pkgs.postgresql_9_6;
|
|
|
|
system.stateVersion = "17.03";
|
|
};
|
|
};
|
|
}
|
|
'';
|
|
description = ''
|
|
A set of NixOS system configurations to be run as lightweight
|
|
containers. Each container appears as a service
|
|
<literal>container-<replaceable>name</replaceable></literal>
|
|
on the host system, allowing it to be started and stopped via
|
|
<command>systemctl</command>.
|
|
'';
|
|
};
|
|
|
|
};
|
|
|
|
|
|
config = mkIf (config.boot.enableContainers) (let
|
|
|
|
unit = {
|
|
description = "Container '%i'";
|
|
|
|
unitConfig.RequiresMountsFor = [ "/var/lib/containers/%i" ];
|
|
|
|
path = [ pkgs.iproute ];
|
|
|
|
environment.INSTANCE = "%i";
|
|
environment.root = "/var/lib/containers/%i";
|
|
|
|
preStart = preStartScript dummyConfig;
|
|
|
|
script = startScript dummyConfig;
|
|
|
|
postStart = postStartScript dummyConfig;
|
|
|
|
preStop =
|
|
''
|
|
pid="$(cat /run/containers/$INSTANCE.pid)"
|
|
if [ -n "$pid" ]; then
|
|
kill -RTMIN+4 "$pid"
|
|
fi
|
|
rm -f "/run/containers/$INSTANCE.pid"
|
|
'';
|
|
|
|
restartIfChanged = false;
|
|
|
|
serviceConfig = serviceDirectives dummyConfig;
|
|
};
|
|
in {
|
|
systemd.targets."multi-user".wants = [ "machines.target" ];
|
|
|
|
systemd.services = listToAttrs (filter (x: x.value != null) (
|
|
# The generic container template used by imperative containers
|
|
[{ name = "container@"; value = unit; }]
|
|
# declarative containers
|
|
++ (mapAttrsToList (name: cfg: nameValuePair "container@${name}" (let
|
|
config = cfg // (
|
|
if cfg.enableTun then
|
|
{
|
|
allowedDevices = cfg.allowedDevices
|
|
++ [ { node = "/dev/net/tun"; modifier = "rw"; } ];
|
|
additionalCapabilities = cfg.additionalCapabilities
|
|
++ [ "CAP_NET_ADMIN" ];
|
|
}
|
|
else {});
|
|
in
|
|
unit // {
|
|
preStart = preStartScript config;
|
|
script = startScript config;
|
|
postStart = postStartScript config;
|
|
serviceConfig = serviceDirectives config;
|
|
} // (
|
|
if config.autoStart then
|
|
{
|
|
wantedBy = [ "machines.target" ];
|
|
wants = [ "network.target" ];
|
|
after = [ "network.target" ];
|
|
restartTriggers = [ config.path ];
|
|
reloadIfChanged = true;
|
|
}
|
|
else {})
|
|
)) config.containers)
|
|
));
|
|
|
|
# Generate a configuration file in /etc/containers for each
|
|
# container so that container@.target can get the container
|
|
# configuration.
|
|
environment.etc =
|
|
let mkPortStr = p: p.protocol + ":" + (toString p.hostPort) + ":" + (if p.containerPort == null then toString p.hostPort else toString p.containerPort);
|
|
in mapAttrs' (name: cfg: nameValuePair "containers/${name}.conf"
|
|
{ text =
|
|
''
|
|
SYSTEM_PATH=${cfg.path}
|
|
${optionalString cfg.privateNetwork ''
|
|
PRIVATE_NETWORK=1
|
|
${optionalString (cfg.hostBridge != null) ''
|
|
HOST_BRIDGE=${cfg.hostBridge}
|
|
''}
|
|
${optionalString (length cfg.forwardPorts > 0) ''
|
|
HOST_PORT=${concatStringsSep "," (map mkPortStr cfg.forwardPorts)}
|
|
''}
|
|
${optionalString (cfg.hostAddress != null) ''
|
|
HOST_ADDRESS=${cfg.hostAddress}
|
|
''}
|
|
${optionalString (cfg.hostAddress6 != null) ''
|
|
HOST_ADDRESS6=${cfg.hostAddress6}
|
|
''}
|
|
${optionalString (cfg.localAddress != null) ''
|
|
LOCAL_ADDRESS=${cfg.localAddress}
|
|
''}
|
|
${optionalString (cfg.localAddress6 != null) ''
|
|
LOCAL_ADDRESS6=${cfg.localAddress6}
|
|
''}
|
|
''}
|
|
INTERFACES="${toString cfg.interfaces}"
|
|
MACVLANS="${toString cfg.macvlans}"
|
|
${optionalString cfg.autoStart ''
|
|
AUTO_START=1
|
|
''}
|
|
EXTRA_NSPAWN_FLAGS="${mkBindFlags cfg.bindMounts +
|
|
optionalString (cfg.extraFlags != [])
|
|
(" " + concatStringsSep " " cfg.extraFlags)}"
|
|
'';
|
|
}) config.containers;
|
|
|
|
# Generate /etc/hosts entries for the containers.
|
|
networking.extraHosts = concatStrings (mapAttrsToList (name: cfg: optionalString (cfg.localAddress != null)
|
|
''
|
|
${head (splitString "/" cfg.localAddress)} ${name}.containers
|
|
'') config.containers);
|
|
|
|
networking.dhcpcd.denyInterfaces = [ "ve-*" "vb-*" ];
|
|
|
|
services.udev.extraRules = optionalString config.networking.networkmanager.enable ''
|
|
# Don't manage interfaces created by nixos-container.
|
|
ENV{INTERFACE}=="v[eb]-*", ENV{NM_UNMANAGED}="1"
|
|
'';
|
|
|
|
environment.systemPackages = [ pkgs.nixos-container ];
|
|
});
|
|
}
|