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kubelet: Set Kubelet Parameters Via A intermediate Configuration File

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Signed-off-by: Christina Sørensen <christina@cafkafk.com>
This commit is contained in:
Christina Sørensen 2024-02-20 06:59:08 +01:00
parent f33dd27a47
commit 26036ecf31
Signed by: cafkafk
GPG key ID: 26C542FD97F965CE
1 changed files with 36 additions and 23 deletions
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59
nixos/modules/services/cluster/kubernetes/kubelet.nix
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@ -33,6 +33,41 @@ let
kubeconfig = top.lib.mkKubeConfig "kubelet" cfg.kubeconfig;
# Flag based settings are deprecated, use the `--config` flag with a
# `KubeletConfiguration` struct.
# https://kubernetes.io/docs/tasks/administer-cluster/kubelet-config-file/
#
# NOTE: registerWithTaints requires a []core/v1.Taint, therefore requires
# additional work to be put in config format.
#
kubeletConfig = pkgs.writeText "kubelet-config" (builtins.toJSON ({
apiVersion = "kubelet.config.k8s.io/v1beta1";
kind = "KubeletConfiguration";
address = cfg.address;
port = cfg.port;
authentication = {
x509 = lib.optionalAttrs (cfg.clientCaFile != null) { clientCAFile = cfg.clientCaFile; };
webhook = {
enabled = true;
cacheTTL = "10s";
};
};
authorization = {
mode = "Webhook";
};
cgroupDriver = "systemd";
hairpinMode = "hairpin-veth";
registerNode = cfg.registerNode;
containerRuntimeEndpoint = cfg.containerRuntimeEndpoint;
healthzPort = cfg.healthz.port;
healthzBindAddress = cfg.healthz.bind;
} // lib.optionalAttrs (cfg.tlsCertFile != null) { tlsCertFile = cfg.tlsCertFile; }
// lib.optionalAttrs (cfg.tlsKeyFile != null) { tlsPrivateKeyFile = cfg.tlsKeyFile; }
// lib.optionalAttrs (cfg.clusterDomain != "") { clusterDomain = cfg.clusterDomain; }
// lib.optionalAttrs (cfg.clusterDns != "") { clusterDNS = [ cfg.clusterDns ] ; }
// lib.optionalAttrs (cfg.featureGates != []) { featureGates = cfg.featureGates; }
));
manifestPath = "kubernetes/manifests";
taintOptions = with lib.types; { name, ... }: {
@ -294,21 +329,7 @@ in
Restart = "on-failure";
RestartSec = "1000ms";
ExecStart = ''${top.package}/bin/kubelet \
--address=${cfg.address} \
--authentication-token-webhook \
--authentication-token-webhook-cache-ttl="10s" \
--authorization-mode=Webhook \
${optionalString (cfg.clientCaFile != null)
"--client-ca-file=${cfg.clientCaFile}"} \
${optionalString (cfg.clusterDns != "")
"--cluster-dns=${cfg.clusterDns}"} \
${optionalString (cfg.clusterDomain != "")
"--cluster-domain=${cfg.clusterDomain}"} \
${optionalString (cfg.featureGates != [])
"--feature-gates=${concatMapStringsSep "," (feature: "${feature}=true") cfg.featureGates}"} \
--hairpin-mode=hairpin-veth \
--healthz-bind-address=${cfg.healthz.bind} \
--healthz-port=${toString cfg.healthz.port} \
--config=${kubeletConfig} \
--hostname-override=${cfg.hostname} \
--kubeconfig=${kubeconfig} \
${optionalString (cfg.nodeIp != null)
@ -316,18 +337,10 @@ in
--pod-infra-container-image=pause \
${optionalString (cfg.manifests != {})
"--pod-manifest-path=/etc/${manifestPath}"} \
--port=${toString cfg.port} \
--register-node=${boolToString cfg.registerNode} \
${optionalString (taints != "")
"--register-with-taints=${taints}"} \
--root-dir=${top.dataDir} \
${optionalString (cfg.tlsCertFile != null)
"--tls-cert-file=${cfg.tlsCertFile}"} \
${optionalString (cfg.tlsKeyFile != null)
"--tls-private-key-file=${cfg.tlsKeyFile}"} \
${optionalString (cfg.verbosity != null) "--v=${toString cfg.verbosity}"} \
--container-runtime-endpoint=${cfg.containerRuntimeEndpoint} \
--cgroup-driver=systemd \
${cfg.extraOpts}
'';
WorkingDirectory = top.dataDir;