nixpkgs/nixos/modules/services/cluster/kubernetes/scheduler.nix
2019-02-21 14:57:57 +01:00

95 lines
2.6 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
top = config.services.kubernetes;
cfg = top.scheduler;
in
{
###### interface
options.services.kubernetes.scheduler = with lib.types; {
address = mkOption {
description = "Kubernetes scheduler listening address.";
default = "127.0.0.1";
type = str;
};
enable = mkEnableOption "Whether to enable Kubernetes scheduler.";
extraOpts = mkOption {
description = "Kubernetes scheduler extra command line options.";
default = "";
type = str;
};
featureGates = mkOption {
description = "List set of feature gates";
default = top.featureGates;
type = listOf str;
};
kubeconfig = top.lib.mkKubeConfigOptions "Kubernetes scheduler";
leaderElect = mkOption {
description = "Whether to start leader election before executing main loop.";
type = bool;
default = true;
};
port = mkOption {
description = "Kubernetes scheduler listening port.";
default = 10251;
type = int;
};
verbosity = mkOption {
description = ''
Optional glog verbosity level for logging statements. See
<link xlink:href="https://github.com/kubernetes/community/blob/master/contributors/devel/logging.md"/>
'';
default = null;
type = nullOr int;
};
};
###### implementation
config = mkIf cfg.enable {
systemd.services.kube-scheduler = {
description = "Kubernetes Scheduler Service";
wantedBy = [ "kubernetes.target" ];
after = [ "kube-apiserver.service" ];
serviceConfig = {
Slice = "kubernetes.slice";
ExecStart = ''${top.package}/bin/kube-scheduler \
--address=${cfg.address} \
${optionalString (cfg.featureGates != [])
"--feature-gates=${concatMapStringsSep "," (feature: "${feature}=true") cfg.featureGates}"} \
--kubeconfig=${top.lib.mkKubeConfig "kube-scheduler" cfg.kubeconfig} \
--leader-elect=${boolToString cfg.leaderElect} \
--port=${toString cfg.port} \
${optionalString (cfg.verbosity != null) "--v=${toString cfg.verbosity}"} \
${cfg.extraOpts}
'';
WorkingDirectory = top.dataDir;
User = "kubernetes";
Group = "kubernetes";
Restart = "on-failure";
RestartSec = 5;
};
};
services.kubernetes.pki.certs = {
schedulerClient = top.lib.mkCert {
name = "kube-scheduler-client";
CN = "system:kube-scheduler";
action = "systemctl restart kube-scheduler.service";
};
};
services.kubernetes.scheduler.kubeconfig.server = mkDefault top.apiserverAddress;
};
}