121 lines
3.3 KiB
Nix
121 lines
3.3 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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top = config.services.kubernetes;
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cfg = top.scheduler;
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in
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{
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###### interface
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options.services.kubernetes.scheduler = with lib.types; {
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address = mkOption {
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description = "Kubernetes scheduler listening address.";
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default = "127.0.0.1";
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type = str;
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};
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enable = mkEnableOption "Kubernetes scheduler";
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extraOpts = mkOption {
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description = "Kubernetes scheduler extra command line options.";
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default = "";
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type = str;
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};
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featureGates = mkOption {
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description = "List set of feature gates";
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default = top.featureGates;
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type = listOf str;
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};
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kubeconfig = top.lib.mkKubeConfigOptions "Kubernetes scheduler";
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leaderElect = mkOption {
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description = "Whether to start leader election before executing main loop.";
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type = bool;
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default = true;
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};
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port = mkOption {
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description = "Kubernetes scheduler listening port.";
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default = 10251;
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type = int;
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};
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verbosity = mkOption {
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description = ''
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Optional glog verbosity level for logging statements. See
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<link xlink:href="https://github.com/kubernetes/community/blob/master/contributors/devel/logging.md"/>
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'';
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default = null;
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type = nullOr int;
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};
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};
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###### implementation
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config = let
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schedulerPaths = filter (a: a != null) [
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cfg.kubeconfig.caFile
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cfg.kubeconfig.certFile
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cfg.kubeconfig.keyFile
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];
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in mkIf cfg.enable {
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systemd.services.kube-scheduler = rec {
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description = "Kubernetes Scheduler Service";
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wantedBy = [ "kube-control-plane-online.target" ];
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after = [ "kube-apiserver.service" ];
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before = [ "kube-control-plane-online.target" ];
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environment.KUBECONFIG = top.lib.mkKubeConfig "kube-scheduler" cfg.kubeconfig;
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path = [ pkgs.kubectl ];
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preStart = ''
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until kubectl auth can-i get /api -q 2>/dev/null; do
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echo kubectl auth can-i get /api: exit status $?
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sleep 2
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done
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'';
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serviceConfig = {
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Slice = "kubernetes.slice";
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ExecStart = ''${top.package}/bin/kube-scheduler \
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--address=${cfg.address} \
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${optionalString (cfg.featureGates != [])
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"--feature-gates=${concatMapStringsSep "," (feature: "${feature}=true") cfg.featureGates}"} \
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--kubeconfig=${environment.KUBECONFIG} \
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--leader-elect=${boolToString cfg.leaderElect} \
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--port=${toString cfg.port} \
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${optionalString (cfg.verbosity != null) "--v=${toString cfg.verbosity}"} \
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${cfg.extraOpts}
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'';
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WorkingDirectory = top.dataDir;
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User = "kubernetes";
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Group = "kubernetes";
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Restart = "on-failure";
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RestartSec = 5;
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};
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unitConfig.ConditionPathExists = schedulerPaths;
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};
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systemd.paths.kube-scheduler = {
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wantedBy = [ "kube-scheduler.service" ];
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pathConfig = {
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PathExists = schedulerPaths;
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PathChanged = schedulerPaths;
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};
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};
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services.kubernetes.pki.certs = {
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schedulerClient = top.lib.mkCert {
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name = "kube-scheduler-client";
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CN = "system:kube-scheduler";
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action = "systemctl restart kube-scheduler.service";
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};
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};
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services.kubernetes.scheduler.kubeconfig.server = mkDefault top.apiserverAddress;
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};
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}
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