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{ config, lib, options, pkgs, ... }:
with lib;
let
top = config.services.kubernetes;
otop = options.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 "Kubernetes scheduler";
extraOpts = mkOption {
description = "Kubernetes scheduler extra command line options.";
default = "";
type = separatedString " ";
};
featureGates = mkOption {
description = "List set of feature gates";
default = top.featureGates;
defaultText = literalExpression "config.${otop.featureGates}";
type = listOf str;
};
kubeconfig = top.lib.mkKubeConfigOptions "Kubernetes scheduler";
leaderElect = mkOption {
description = "Whether to start leader election before executing main loop.";
type = bool;
default = true;
};
port = mkOption {
description = "Kubernetes scheduler listening port.";
default = 10251;
type = int;
};
verbosity = mkOption {
description = ''
Optional glog verbosity level for logging statements. See
<link xlink:href="https://github.com/kubernetes/community/blob/master/contributors/devel/logging.md"/>
'';
default = null;
type = nullOr int;
};
};
###### implementation
config = mkIf cfg.enable {
systemd.services.kube-scheduler = {
description = "Kubernetes Scheduler Service";
wantedBy = [ "kubernetes.target" ];
after = [ "kube-apiserver.service" ];
serviceConfig = {
Slice = "kubernetes.slice";
ExecStart = ''${top.package}/bin/kube-scheduler \
--bind-address=${cfg.address} \
${optionalString (cfg.featureGates != [])
"--feature-gates=${concatMapStringsSep "," (feature: "${feature}=true") cfg.featureGates}"} \
--kubeconfig=${top.lib.mkKubeConfig "kube-scheduler" cfg.kubeconfig} \
--leader-elect=${boolToString cfg.leaderElect} \
--secure-port=${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;
};
unitConfig = {
StartLimitIntervalSec = 0;
};
};
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;
};
meta.buildDocsInSandbox = false;
}
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