nixpkgs/nixos/modules/services/networking/flannel.nix
Joachim Fasting f9f354faad
nixos/modules: use defaultText where applicable
Primarily to fix rendering of these default values in the manual but
it's also nice to avoid having to eval these things just to build the
manual.
2016-11-21 16:35:15 +01:00

155 lines
4.2 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.flannel;
networkConfig = filterAttrs (n: v: v != null) {
Network = cfg.network;
SubnetLen = cfg.subnetLen;
SubnetMin = cfg.subnetMin;
SubnetMax = cfg.subnetMax;
Backend = cfg.backend;
};
in {
options.services.flannel = {
enable = mkEnableOption "flannel";
package = mkOption {
description = "Package to use for flannel";
type = types.package;
default = pkgs.flannel.bin;
defaultText = "pkgs.flannel.bin";
};
publicIp = mkOption {
description = ''
IP accessible by other nodes for inter-host communication.
Defaults to the IP of the interface being used for communication.
'';
type = types.nullOr types.str;
default = null;
};
iface = mkOption {
description = ''
Interface to use (IP or name) for inter-host communication.
Defaults to the interface for the default route on the machine.
'';
type = types.nullOr types.str;
default = null;
};
etcd = {
endpoints = mkOption {
description = "Etcd endpoints";
type = types.listOf types.str;
default = ["http://127.0.0.1:2379"];
};
prefix = mkOption {
description = "Etcd key prefix";
type = types.str;
default = "/coreos.com/network";
};
caFile = mkOption {
description = "Etcd certificate authority file";
type = types.nullOr types.path;
default = null;
};
certFile = mkOption {
description = "Etcd cert file";
type = types.nullOr types.path;
default = null;
};
keyFile = mkOption {
description = "Etcd key file";
type = types.nullOr types.path;
default = null;
};
};
network = mkOption {
description = " IPv4 network in CIDR format to use for the entire flannel network.";
type = types.str;
};
subnetLen = mkOption {
description = ''
The size of the subnet allocated to each host. Defaults to 24 (i.e. /24)
unless the Network was configured to be smaller than a /24 in which case
it is one less than the network.
'';
type = types.int;
default = 24;
};
subnetMin = mkOption {
description = ''
The beginning of IP range which the subnet allocation should start with.
Defaults to the first subnet of Network.
'';
type = types.nullOr types.str;
default = null;
};
subnetMax = mkOption {
description = ''
The end of IP range which the subnet allocation should start with.
Defaults to the last subnet of Network.
'';
type = types.nullOr types.str;
default = null;
};
backend = mkOption {
description = "Type of backend to use and specific configurations for that backend.";
type = types.attrs;
default = {
Type = "vxlan";
};
};
};
config = mkIf cfg.enable {
systemd.services.flannel = {
description = "Flannel Service";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
environment = {
FLANNELD_PUBLIC_IP = cfg.publicIp;
FLANNELD_ETCD_ENDPOINTS = concatStringsSep "," cfg.etcd.endpoints;
FLANNELD_ETCD_KEYFILE = cfg.etcd.keyFile;
FLANNELD_ETCD_CERTFILE = cfg.etcd.certFile;
FLANNELD_ETCD_CAFILE = cfg.etcd.caFile;
FLANNELD_IFACE = cfg.iface;
ETCDCTL_CERT_FILE = cfg.etcd.certFile;
ETCDCTL_KEY_FILE = cfg.etcd.keyFile;
ETCDCTL_CA_FILE = cfg.etcd.caFile;
ETCDCTL_PEERS = concatStringsSep "," cfg.etcd.endpoints;
};
preStart = ''
echo "setting network configuration"
until ${pkgs.etcdctl.bin}/bin/etcdctl set /coreos.com/network/config '${builtins.toJSON networkConfig}'
do
echo "setting network configuration, retry"
sleep 1
done
'';
postStart = ''
while [ ! -f /run/flannel/subnet.env ]
do
sleep 1
done
'';
serviceConfig.ExecStart = "${cfg.package}/bin/flannel";
};
services.etcd.enable = mkDefault cfg.etcd.endpoints == ["http://127.0.0.1:2379"];
};
}