diff options
Diffstat (limited to 'nixos/modules/virtualisation/containers.nix')
| -rw-r--r-- | nixos/modules/virtualisation/containers.nix | 879 |
1 files changed, 90 insertions, 789 deletions
diff --git a/nixos/modules/virtualisation/containers.nix b/nixos/modules/virtualisation/containers.nix index dad211ef55b..7d184575640 100644 --- a/nixos/modules/virtualisation/containers.nix +++ b/nixos/modules/virtualisation/containers.nix @@ -1,824 +1,125 @@ { 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 "$HOST_ADDRESS6" ] || - [ -n "$LOCAL_ADDRESS" ] || [ -n "$LOCAL_ADDRESS6" ] || - [ -n "$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" ] || - [ -n "$HOST_ADDRESS6" ] || [ -n "$LOCAL_ADDRESS6" ]; 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" \ - ${optionalString (!cfg.ephemeral) "--link-journal=try-guest"} \ - --setenv PRIVATE_NETWORK="$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" \ - ${optionalString cfg.ephemeral "--ephemeral"} \ - ${if cfg.additionalCapabilities != null && cfg.additionalCapabilities != [] then - ''--capability="${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 "$LOCAL_ADDRESS" ] || - [ -n "$HOST_ADDRESS6" ] || [ -n "$LOCAL_ADDRESS6" ]; then - ip link del dev "ve-$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 "$LOCAL_ADDRESS" ] || - [ -n "$HOST_ADDRESS6" ] || [ -n "$LOCAL_ADDRESS6" ]; then - if [ -z "$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 - '' - ); - - serviceDirectives = cfg: { - ExecReload = pkgs.writeScript "reload-container" - '' - #! ${pkgs.runtimeShell} -e - ${pkgs.nixos-container}/bin/nixos-container run "$INSTANCE" -- \ - bash --login -c "''${SYSTEM_PATH:-/nix/var/nix/profiles/system}/bin/switch-to-configuration test" - ''; - - SyslogIdentifier = "container %i"; - - EnvironmentFile = "-/etc/containers/%i.conf"; - - Type = "notify"; - - RuntimeDirectory = lib.optional cfg.ephemeral "containers/%i"; - - # Note that on reboot, systemd-nspawn returns 133, so this - # unit will be restarted. On poweroff, it returns 0, so the - # unit won't be restarted. - RestartForceExitStatus = "133"; - SuccessExitStatus = "133"; - - # Some containers take long to start - # especially when you automatically start many at once - TimeoutStartSec = cfg.timeoutStartSec; - - Restart = "on-failure"; - - Slice = "machine.slice"; - Delegate = true; - - # Hack: we don't want to kill systemd-nspawn, since we call - # "machinectl poweroff" in preStop to shut down the - # container cleanly. But systemd requires sending a signal - # (at least if we want remaining processes to be killed - # after the timeout). So send an ignored signal. - KillMode = "mixed"; - KillSignal = "WINCH"; - - DevicePolicy = "closed"; - DeviceAllow = map (d: "${d.node} ${d.modifier}") cfg.allowedDevices; + cfg = config.virtualisation.containers; + + inherit (lib) mkOption types; + + # Once https://github.com/NixOS/nixpkgs/pull/75584 is merged we can use the TOML generator + toTOML = name: value: pkgs.runCommandNoCC name { + nativeBuildInputs = [ pkgs.remarshal ]; + value = builtins.toJSON value; + passAsFile = [ "value" ]; + } '' + json2toml "$valuePath" "$out" + ''; + + # Copy configuration files to avoid having the entire sources in the system closure + copyFile = filePath: pkgs.runCommandNoCC (builtins.unsafeDiscardStringContext (builtins.baseNameOf filePath)) {} '' + cp ${filePath} $out + ''; +in +{ + meta = { + maintainers = [] ++ lib.teams.podman.members; }; + options.virtualisation.containers = { - system = config.nixpkgs.localSystem.system; - - bindMountOpts = { name, ... }: { - - options = { - mountPoint = mkOption { - example = "/mnt/usb"; - type = types.str; - description = "Mount point on the container file system."; - }; - hostPath = mkOption { - default = null; - example = "/home/alice"; - type = types.nullOr types.str; - description = "Location of the host path to be mounted."; - }; - isReadOnly = mkOption { - default = true; + enable = + mkOption { type = types.bool; - description = "Determine whether the mounted path will be accessed in read-only mode."; + default = false; + description = '' + This option enables the common /etc/containers configuration module. + ''; }; - }; - - config = { - mountPoint = mkDefault name; - }; - }; - - allowedDeviceOpts = { ... }: { - options = { - node = mkOption { - example = "/dev/net/tun"; - type = types.str; - description = "Path to device node"; - }; - modifier = mkOption { - example = "rw"; - type = types.str; + registries = { + search = mkOption { + type = types.listOf types.str; + default = [ "docker.io" "quay.io" ]; description = '' - Device node access modifier. Takes a combination - <literal>r</literal> (read), <literal>w</literal> (write), and - <literal>m</literal> (mknod). See the - <literal>systemd.resource-control(5)</literal> man page for more - information.''; + List of repositories to search. + ''; }; - }; - }; - - - mkBindFlag = d: - let flagPrefix = if d.isReadOnly then " --bind-ro=" else " --bind="; - mountstr = if d.hostPath != null then "${d.hostPath}:${d.mountPoint}" else "${d.mountPoint}"; - in flagPrefix + mountstr ; - mkBindFlags = bs: concatMapStrings mkBindFlag (lib.attrValues bs); + insecure = mkOption { + default = []; + type = types.listOf types.str; + description = '' + List of insecure repositories. + ''; + }; - networkOptions = { - hostBridge = mkOption { - type = types.nullOr types.str; - 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. - ''; + block = mkOption { + default = []; + type = types.listOf types.str; + description = '' + List of blocked repositories. + ''; + }; }; - 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"; + policy = mkOption { + default = {}; + type = types.attrs; + example = lib.literalExample '' + { + default = [ { type = "insecureAcceptAnything"; } ]; + transports = { + docker-daemon = { + "" = [ { type = "insecureAcceptAnything"; } ]; + }; }; - }; - }); - 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.str; - default = null; - example = "fc00::1"; description = '' - The IPv6 address assigned to the host interface. - (Not used when hostBridge is set.) + Signature verification policy file. + If this option is empty the default policy file from + <literal>skopeo</literal> will be used. ''; }; - 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.str; - default = null; - example = "fc00::2"; + users = mkOption { + default = []; + type = types.listOf types.str; 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. + List of users to set up subuid/subgid mappings for. + This is a requirement for running rootless containers. ''; }; }; - dummyConfig = - { - extraVeths = {}; - additionalCapabilities = []; - ephemeral = false; - timeoutStartSec = "15s"; - 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. - ''; - }; + config = lib.mkIf cfg.enable { - boot.enableContainers = mkOption { - type = types.bool; - default = !config.boot.isContainer; - description = '' - Whether to enable support for NixOS containers. - ''; + environment.etc."containers/registries.conf".source = toTOML "registries.conf" { + registries = lib.mapAttrs (n: v: { registries = v; }) cfg.registries; }; - 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 = { - _file = "module at ${__curPos.file}:${toString __curPos.line}"; - config = { - boot.isContainer = true; - networking.hostName = mkDefault name; - networking.useDHCP = false; - assertions = [ - { - assertion = config.privateNetwork -> stringLength name < 12; - message = '' - Container name `${name}` is too long: When `privateNetwork` is enabled, container names can - not be longer than 11 characters, because the container's interface name is derived from it. - This might be fixed in the future. See https://github.com/NixOS/nixpkgs/issues/38509 - ''; - } - ]; - }; - }; - in [ extraConfig ] ++ (map (x: x.value) defs); - prefix = [ "containers" name ]; - }).config; - }; - }; - - path = mkOption { - type = types.path; - example = "/nix/var/nix/profiles/containers/webserver"; - description = '' - As an alternative to specifying - <option>config</option>, you can specify the path to - the evaluated NixOS system configuration, typically a - symlink to a system profile. - ''; - }; - - additionalCapabilities = mkOption { - type = types.listOf types.str; - default = []; - example = [ "CAP_NET_ADMIN" "CAP_MKNOD" ]; - description = '' - Grant additional capabilities to the container. See the - capabilities(7) and systemd-nspawn(1) man pages for more - information. - ''; - }; - - ephemeral = mkOption { - type = types.bool; - default = false; - description = '' - Runs container in ephemeral mode with the empty root filesystem at boot. - This way container will be bootstrapped from scratch on each boot - and will be cleaned up on shutdown leaving no traces behind. - Useful for completely stateless, reproducible containers. - - Note that this option might require to do some adjustments to the container configuration, - e.g. you might want to set - <varname>systemd.network.networks.$interface.dhcpConfig.ClientIdentifier</varname> to "mac" - if you use <varname>macvlans</varname> option. - This way dhcp client identifier will be stable between the container restarts. - - Note that the container journal will not be linked to the host if this option is enabled. - ''; - }; - - 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.str; - 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. - ''; - }; - - timeoutStartSec = mkOption { - type = types.str; - default = "1min"; - description = '' - Time for the container to start. In case of a timeout, - the container processes get killed. - See <citerefentry><refentrytitle>systemd.time</refentrytitle> - <manvolnum>7</manvolnum></citerefentry> - for more information about the format. - ''; - }; - - bindMounts = mkOption { - type = with types; loaOf (submodule bindMountOpts); - default = {}; - example = literalExample '' - { "/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; - }) + users.extraUsers = builtins.listToAttrs ( + ( + builtins.foldl' ( + acc: user: { + values = acc.values ++ [ + { + name = user; + value = { + subUidRanges = [ { startUid = acc.offset; count = 65536; } ]; + subGidRanges = [ { startGid = acc.offset; count = 65536; } ]; + }; + } ]; - })); - - 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"; - }; - }; + offset = acc.offset + 65536; } - ''; - 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>. - ''; - }; + ) + { values = []; offset = 100000; } (lib.unique cfg.users) + ).values + ); + environment.etc."containers/policy.json".source = + if cfg.policy != {} then pkgs.writeText "policy.json" (builtins.toJSON cfg.policy) + else copyFile "${pkgs.skopeo.src}/default-policy.json"; }; - - config = mkIf (config.boot.enableContainers) (let - - unit = { - description = "Container '%i'"; - - unitConfig.RequiresMountsFor = "/var/lib/containers/%i"; - - path = [ pkgs.iproute ]; - - environment = { - root = "/var/lib/containers/%i"; - INSTANCE = "%i"; - }; - - preStart = preStartScript dummyConfig; - - script = startScript dummyConfig; - - postStart = postStartScript dummyConfig; - - preStop = "machinectl poweroff $INSTANCE"; - - restartIfChanged = false; - - serviceConfig = serviceDirectives dummyConfig; - }; - in { - systemd.targets.multi-user.wants = [ "machines.target" ]; - - systemd.services = listToAttrs (filter (x: x.value != null) ( - # The generic container template used by imperative containers - [{ name = "container@"; value = unit; }] - # declarative containers - ++ (mapAttrsToList (name: cfg: nameValuePair "container@${name}" (let - containerConfig = cfg // ( - if cfg.enableTun then - { - allowedDevices = cfg.allowedDevices - ++ [ { node = "/dev/net/tun"; modifier = "rw"; } ]; - additionalCapabilities = cfg.additionalCapabilities - ++ [ "CAP_NET_ADMIN" ]; - } - else {}); - in - recursiveUpdate unit { - preStart = preStartScript containerConfig; - script = startScript containerConfig; - postStart = postStartScript containerConfig; - serviceConfig = serviceDirectives containerConfig; - unitConfig.RequiresMountsFor = lib.optional (!containerConfig.ephemeral) "/var/lib/containers/%i"; - environment.root = if containerConfig.ephemeral then "/run/containers/%i" else "/var/lib/containers/%i"; - } // ( - if containerConfig.autoStart then - { - wantedBy = [ "machines.target" ]; - wants = [ "network.target" ]; - after = [ "network.target" ]; - restartTriggers = [ - containerConfig.path - config.environment.etc."containers/${name}.conf".source - ]; - restartIfChanged = true; - } - else {}) - )) config.containers) - )); - - # Generate a configuration file in /etc/containers for each - # container so that container@.target can get the container - # configuration. - environment.etc = - let mkPortStr = p: p.protocol + ":" + (toString p.hostPort) + ":" + (if p.containerPort == null then toString p.hostPort else toString p.containerPort); - in mapAttrs' (name: cfg: nameValuePair "containers/${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 ]; - - boot.kernelModules = [ - "bridge" - "macvlan" - "tap" - "tun" - ]; - }); } |