nixpkgs-suyu/nixos/modules/services/cluster/kubernetes/default.nix

1187 lines
39 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.kubernetes;
# YAML config; see:
# https://kubernetes.io/docs/tasks/administer-cluster/kubelet-config-file/
# https://github.com/kubernetes/kubernetes/blob/release-1.10/pkg/kubelet/apis/kubeletconfig/v1beta1/types.go
#
# TODO: migrate the following flags to this config file
#
# --pod-manifest-path
# --address
# --port
# --tls-cert-file
# --tls-private-key-file
# --client-ca-file
# --authentication-token-webhook
# --authentication-token-webhook-cache-ttl
# --authorization-mode
# --healthz-bind-address
# --healthz-port
# --allow-privileged
# --cluster-dns
# --cluster-domain
# --hairpin-mode
# --feature-gates
kubeletConfig = pkgs.runCommand "kubelet-config.yaml" { } ''
echo > $out ${pkgs.lib.escapeShellArg (builtins.toJSON {
kind = "KubeletConfiguration";
apiVersion = "kubelet.config.k8s.io/v1beta1";
${if cfg.kubelet.applyManifests then "staticPodPath" else null} =
manifests;
})}
'';
skipAttrs = attrs: map (filterAttrs (k: v: k != "enable"))
(filter (v: !(hasAttr "enable" v) || v.enable) attrs);
infraContainer = pkgs.dockerTools.buildImage {
name = "pause";
tag = "latest";
contents = cfg.package.pause;
config.Cmd = "/bin/pause";
};
mkKubeConfig = name: cfg: pkgs.writeText "${name}-kubeconfig" (builtins.toJSON {
apiVersion = "v1";
kind = "Config";
clusters = [{
name = "local";
cluster.certificate-authority = cfg.caFile;
cluster.server = cfg.server;
}];
users = [{
name = "kubelet";
user = {
client-certificate = cfg.certFile;
client-key = cfg.keyFile;
};
}];
contexts = [{
context = {
cluster = "local";
user = "kubelet";
};
current-context = "kubelet-context";
}];
});
mkKubeConfigOptions = prefix: {
server = mkOption {
description = "${prefix} kube-apiserver server address.";
default = "http://${cfg.apiserver.address}:${toString cfg.apiserver.port}";
type = types.str;
};
caFile = mkOption {
description = "${prefix} certificate authrority file used to connect to kube-apiserver.";
type = types.nullOr types.path;
default = cfg.caFile;
};
certFile = mkOption {
description = "${prefix} client certificate file used to connect to kube-apiserver.";
type = types.nullOr types.path;
default = null;
};
keyFile = mkOption {
description = "${prefix} client key file used to connect to kube-apiserver.";
type = types.nullOr types.path;
default = null;
};
};
kubeConfigDefaults = {
server = mkDefault cfg.kubeconfig.server;
caFile = mkDefault cfg.kubeconfig.caFile;
certFile = mkDefault cfg.kubeconfig.certFile;
keyFile = mkDefault cfg.kubeconfig.keyFile;
};
cniConfig = pkgs.buildEnv {
name = "kubernetes-cni-config";
paths = imap (i: entry:
pkgs.writeTextDir "${toString (10+i)}-${entry.type}.conf" (builtins.toJSON entry)
) cfg.kubelet.cni.config;
};
manifests = pkgs.buildEnv {
name = "kubernetes-manifests";
paths = mapAttrsToList (name: manifest:
pkgs.writeTextDir "${name}.json" (builtins.toJSON manifest)
) cfg.kubelet.manifests;
};
addons = pkgs.runCommand "kubernetes-addons" { } ''
mkdir -p $out
# since we are mounting the addons to the addon manager, they need to be copied
${concatMapStringsSep ";" (a: "cp -v ${a}/* $out/") (mapAttrsToList (name: addon:
pkgs.writeTextDir "${name}.json" (builtins.toJSON addon)
) (cfg.addonManager.addons))}
'';
taintOptions = { name, ... }: {
options = {
key = mkOption {
description = "Key of taint.";
default = name;
type = types.str;
};
value = mkOption {
description = "Value of taint.";
type = types.str;
};
effect = mkOption {
description = "Effect of taint.";
example = "NoSchedule";
type = types.enum ["NoSchedule" "PreferNoSchedule" "NoExecute"];
};
};
};
taints = concatMapStringsSep "," (v: "${v.key}=${v.value}:${v.effect}") (mapAttrsToList (n: v: v) cfg.kubelet.taints);
# needed for flannel to pass options to docker
mkDockerOpts = pkgs.runCommand "mk-docker-opts" {
buildInputs = [ pkgs.makeWrapper ];
} ''
mkdir -p $out
cp ${pkgs.kubernetes.src}/cluster/centos/node/bin/mk-docker-opts.sh $out/mk-docker-opts.sh
# bashInteractive needed for `compgen`
makeWrapper ${pkgs.bashInteractive}/bin/bash $out/mk-docker-opts --add-flags "$out/mk-docker-opts.sh"
'';
in {
###### interface
options.services.kubernetes = {
roles = mkOption {
description = ''
Kubernetes role that this machine should take.
Master role will enable etcd, apiserver, scheduler and controller manager
services. Node role will enable etcd, docker, kubelet and proxy services.
'';
default = [];
type = types.listOf (types.enum ["master" "node"]);
};
package = mkOption {
description = "Kubernetes package to use.";
type = types.package;
default = pkgs.kubernetes;
defaultText = "pkgs.kubernetes";
};
verbose = mkOption {
description = "Kubernetes enable verbose mode for debugging.";
default = false;
type = types.bool;
};
etcd = {
servers = mkOption {
description = "List of etcd servers. By default etcd is started, except if this option is changed.";
default = ["http://127.0.0.1:2379"];
type = types.listOf types.str;
};
keyFile = mkOption {
description = "Etcd key file.";
default = null;
type = types.nullOr types.path;
};
certFile = mkOption {
description = "Etcd cert file.";
default = null;
type = types.nullOr types.path;
};
caFile = mkOption {
description = "Etcd ca file.";
default = cfg.caFile;
type = types.nullOr types.path;
};
};
kubeconfig = mkKubeConfigOptions "Default kubeconfig";
caFile = mkOption {
description = "Default kubernetes certificate authority";
type = types.nullOr types.path;
default = null;
};
dataDir = mkOption {
description = "Kubernetes root directory for managing kubelet files.";
default = "/var/lib/kubernetes";
type = types.path;
};
featureGates = mkOption {
description = "List set of feature gates";
default = [];
type = types.listOf types.str;
};
apiserver = {
enable = mkOption {
description = "Whether to enable Kubernetes apiserver.";
default = false;
type = types.bool;
};
featureGates = mkOption {
description = "List set of feature gates";
default = cfg.featureGates;
type = types.listOf types.str;
};
address = mkOption {
description = "Kubernetes apiserver listening address.";
default = "127.0.0.1";
type = types.str;
};
publicAddress = mkOption {
description = ''
Kubernetes apiserver public listening address used for read only and
secure port.
'';
default = cfg.apiserver.address;
type = types.str;
};
advertiseAddress = mkOption {
description = ''
Kubernetes apiserver IP address on which to advertise the apiserver
to members of the cluster. This address must be reachable by the rest
of the cluster.
'';
default = null;
type = types.nullOr types.str;
};
storageBackend = mkOption {
description = ''
Kubernetes apiserver storage backend.
'';
default = "etcd3";
type = types.enum ["etcd2" "etcd3"];
};
port = mkOption {
description = "Kubernetes apiserver listening port.";
default = 8080;
type = types.int;
};
securePort = mkOption {
description = "Kubernetes apiserver secure port.";
default = 443;
type = types.int;
};
tlsCertFile = mkOption {
description = "Kubernetes apiserver certificate file.";
default = null;
type = types.nullOr types.path;
};
tlsKeyFile = mkOption {
description = "Kubernetes apiserver private key file.";
default = null;
type = types.nullOr types.path;
};
clientCaFile = mkOption {
description = "Kubernetes apiserver CA file for client auth.";
default = cfg.caFile;
type = types.nullOr types.path;
};
tokenAuthFile = mkOption {
description = ''
Kubernetes apiserver token authentication file. See
<link xlink:href="https://kubernetes.io/docs/reference/access-authn-authz/authentication"/>
'';
default = null;
type = types.nullOr types.path;
};
basicAuthFile = mkOption {
description = ''
Kubernetes apiserver basic authentication file. See
<link xlink:href="https://kubernetes.io/docs/reference/access-authn-authz/authentication"/>
'';
default = pkgs.writeText "users" ''
kubernetes,admin,0
'';
type = types.nullOr types.path;
};
authorizationMode = mkOption {
description = ''
Kubernetes apiserver authorization mode (AlwaysAllow/AlwaysDeny/ABAC/RBAC). See
<link xlink:href="https://kubernetes.io/docs/reference/access-authn-authz/authorization/"/>
'';
default = ["RBAC" "Node"];
type = types.listOf (types.enum ["AlwaysAllow" "AlwaysDeny" "ABAC" "RBAC" "Node"]);
};
authorizationPolicy = mkOption {
description = ''
Kubernetes apiserver authorization policy file. See
<link xlink:href="https://kubernetes.io/docs/reference/access-authn-authz/authorization/"/>
'';
default = [];
type = types.listOf types.attrs;
};
allowPrivileged = mkOption {
description = "Whether to allow privileged containers on Kubernetes.";
default = true;
type = types.bool;
};
serviceClusterIpRange = mkOption {
description = ''
A CIDR notation IP range from which to assign service cluster IPs.
This must not overlap with any IP ranges assigned to nodes for pods.
'';
default = "10.0.0.0/24";
type = types.str;
};
runtimeConfig = mkOption {
description = ''
Api runtime configuration. See
<link xlink:href="https://kubernetes.io/docs/tasks/administer-cluster/cluster-management/"/>
'';
default = "authentication.k8s.io/v1beta1=true";
example = "api/all=false,api/v1=true";
type = types.str;
};
enableAdmissionPlugins = mkOption {
description = ''
Kubernetes admission control plugins to enable. See
<link xlink:href="https://kubernetes.io/docs/admin/admission-controllers/"/>
'';
default = ["NamespaceLifecycle" "LimitRanger" "ServiceAccount" "ResourceQuota" "DefaultStorageClass" "DefaultTolerationSeconds" "NodeRestriction"];
example = [
"NamespaceLifecycle" "NamespaceExists" "LimitRanger"
"SecurityContextDeny" "ServiceAccount" "ResourceQuota"
"PodSecurityPolicy" "NodeRestriction" "DefaultStorageClass"
];
type = types.listOf types.str;
};
disableAdmissionPlugins = mkOption {
description = ''
Kubernetes admission control plugins to disable. See
<link xlink:href="https://kubernetes.io/docs/admin/admission-controllers/"/>
'';
default = [];
type = types.listOf types.str;
};
serviceAccountKeyFile = mkOption {
description = ''
Kubernetes apiserver PEM-encoded x509 RSA private or public key file,
used to verify ServiceAccount tokens. By default tls private key file
is used.
'';
default = null;
type = types.nullOr types.path;
};
kubeletClientCaFile = mkOption {
description = "Path to a cert file for connecting to kubelet.";
default = cfg.caFile;
type = types.nullOr types.path;
};
kubeletClientCertFile = mkOption {
description = "Client certificate to use for connections to kubelet.";
default = null;
type = types.nullOr types.path;
};
kubeletClientKeyFile = mkOption {
description = "Key to use for connections to kubelet.";
default = null;
type = types.nullOr types.path;
};
kubeletHttps = mkOption {
description = "Whether to use https for connections to kubelet.";
default = true;
type = types.bool;
};
extraOpts = mkOption {
description = "Kubernetes apiserver extra command line options.";
default = "";
type = types.str;
};
};
scheduler = {
enable = mkOption {
description = "Whether to enable Kubernetes scheduler.";
default = false;
type = types.bool;
};
featureGates = mkOption {
description = "List set of feature gates";
default = cfg.featureGates;
type = types.listOf types.str;
};
address = mkOption {
description = "Kubernetes scheduler listening address.";
default = "127.0.0.1";
type = types.str;
};
port = mkOption {
description = "Kubernetes scheduler listening port.";
default = 10251;
type = types.int;
};
leaderElect = mkOption {
description = "Whether to start leader election before executing main loop.";
type = types.bool;
default = true;
};
kubeconfig = mkKubeConfigOptions "Kubernetes scheduler";
extraOpts = mkOption {
description = "Kubernetes scheduler extra command line options.";
default = "";
type = types.str;
};
};
controllerManager = {
enable = mkOption {
description = "Whether to enable Kubernetes controller manager.";
default = false;
type = types.bool;
};
featureGates = mkOption {
description = "List set of feature gates";
default = cfg.featureGates;
type = types.listOf types.str;
};
address = mkOption {
description = "Kubernetes controller manager listening address.";
default = "127.0.0.1";
type = types.str;
};
port = mkOption {
description = "Kubernetes controller manager listening port.";
default = 10252;
type = types.int;
};
leaderElect = mkOption {
description = "Whether to start leader election before executing main loop.";
type = types.bool;
default = true;
};
serviceAccountKeyFile = mkOption {
description = ''
Kubernetes controller manager PEM-encoded private RSA key file used to
sign service account tokens
'';
default = null;
type = types.nullOr types.path;
};
rootCaFile = mkOption {
description = ''
Kubernetes controller manager certificate authority file included in
service account's token secret.
'';
default = cfg.caFile;
type = types.nullOr types.path;
};
kubeconfig = mkKubeConfigOptions "Kubernetes controller manager";
extraOpts = mkOption {
description = "Kubernetes controller manager extra command line options.";
default = "";
type = types.str;
};
};
kubelet = {
enable = mkOption {
description = "Whether to enable Kubernetes kubelet.";
default = false;
type = types.bool;
};
featureGates = mkOption {
description = "List set of feature gates";
default = cfg.featureGates;
type = types.listOf types.str;
};
seedDockerImages = mkOption {
description = "List of docker images to preload on system";
default = [];
type = types.listOf types.package;
};
registerNode = mkOption {
description = "Whether to auto register kubelet with API server.";
default = true;
type = types.bool;
};
address = mkOption {
description = "Kubernetes kubelet info server listening address.";
default = "0.0.0.0";
type = types.str;
};
port = mkOption {
description = "Kubernetes kubelet info server listening port.";
default = 10250;
type = types.int;
};
tlsCertFile = mkOption {
description = "File containing x509 Certificate for HTTPS.";
default = null;
type = types.nullOr types.path;
};
tlsKeyFile = mkOption {
description = "File containing x509 private key matching tlsCertFile.";
default = null;
type = types.nullOr types.path;
};
clientCaFile = mkOption {
description = "Kubernetes apiserver CA file for client authentication.";
default = cfg.caFile;
type = types.nullOr types.path;
};
healthz = {
bind = mkOption {
description = "Kubernetes kubelet healthz listening address.";
default = "127.0.0.1";
type = types.str;
};
port = mkOption {
description = "Kubernetes kubelet healthz port.";
default = 10248;
type = types.int;
};
};
hostname = mkOption {
description = "Kubernetes kubelet hostname override.";
default = config.networking.hostName;
type = types.str;
};
allowPrivileged = mkOption {
description = "Whether to allow Kubernetes containers to request privileged mode.";
default = true;
type = types.bool;
};
# TODO: remove this deprecated flag
cadvisorPort = mkOption {
description = "Kubernetes kubelet local cadvisor port.";
default = 4194;
type = types.int;
};
clusterDns = mkOption {
description = "Use alternative DNS.";
default = "10.1.0.1";
type = types.str;
};
clusterDomain = mkOption {
description = "Use alternative domain.";
default = config.services.kubernetes.addons.dns.clusterDomain;
type = types.str;
};
networkPlugin = mkOption {
description = "Network plugin to use by Kubernetes.";
type = types.nullOr (types.enum ["cni" "kubenet"]);
default = "kubenet";
};
cni = {
packages = mkOption {
description = "List of network plugin packages to install.";
type = types.listOf types.package;
default = [];
};
config = mkOption {
description = "Kubernetes CNI configuration.";
type = types.listOf types.attrs;
default = [];
example = literalExample ''
[{
"cniVersion": "0.2.0",
"name": "mynet",
"type": "bridge",
"bridge": "cni0",
"isGateway": true,
"ipMasq": true,
"ipam": {
"type": "host-local",
"subnet": "10.22.0.0/16",
"routes": [
{ "dst": "0.0.0.0/0" }
]
}
} {
"cniVersion": "0.2.0",
"type": "loopback"
}]
'';
};
};
manifests = mkOption {
description = "List of manifests to bootstrap with kubelet (only pods can be created as manifest entry)";
type = types.attrsOf types.attrs;
default = {};
};
applyManifests = mkOption {
description = "Whether to apply manifests (this is true for master node).";
default = false;
type = types.bool;
};
unschedulable = mkOption {
description = "Whether to set node taint to unschedulable=true as it is the case of node that has only master role.";
default = false;
type = types.bool;
};
taints = mkOption {
description = "Node taints (https://kubernetes.io/docs/concepts/configuration/assign-pod-node/).";
default = {};
type = types.attrsOf (types.submodule [ taintOptions ]);
};
nodeIp = mkOption {
description = "IP address of the node. If set, kubelet will use this IP address for the node.";
default = null;
type = types.nullOr types.str;
};
kubeconfig = mkKubeConfigOptions "Kubelet";
extraOpts = mkOption {
description = "Kubernetes kubelet extra command line options.";
default = "";
type = types.str;
};
};
proxy = {
enable = mkOption {
description = "Whether to enable Kubernetes proxy.";
default = false;
type = types.bool;
};
featureGates = mkOption {
description = "List set of feature gates";
default = cfg.featureGates;
type = types.listOf types.str;
};
address = mkOption {
description = "Kubernetes proxy listening address.";
default = "0.0.0.0";
type = types.str;
};
kubeconfig = mkKubeConfigOptions "Kubernetes proxy";
extraOpts = mkOption {
description = "Kubernetes proxy extra command line options.";
default = "";
type = types.str;
};
};
addonManager = {
enable = mkOption {
description = "Whether to enable Kubernetes addon manager.";
default = false;
type = types.bool;
};
addons = mkOption {
description = "Kubernetes addons (any kind of Kubernetes resource can be an addon).";
default = { };
type = types.attrsOf (types.either types.attrs (types.listOf types.attrs));
example = literalExample ''
{
"my-service" = {
"apiVersion" = "v1";
"kind" = "Service";
"metadata" = {
"name" = "my-service";
"namespace" = "default";
};
"spec" = { ... };
};
}
// import <nixpkgs/nixos/modules/services/cluster/kubernetes/dashboard.nix> { cfg = config.services.kubernetes; };
'';
};
};
path = mkOption {
description = "Packages added to the services' PATH environment variable. Both the bin and sbin subdirectories of each package are added.";
type = types.listOf types.package;
default = [];
};
clusterCidr = mkOption {
description = "Kubernetes controller manager and proxy CIDR Range for Pods in cluster.";
default = "10.1.0.0/16";
type = types.str;
};
flannel.enable = mkOption {
description = "Whether to enable flannel networking";
default = false;
type = types.bool;
};
};
###### implementation
config = mkMerge [
(mkIf cfg.kubelet.enable {
services.kubernetes.kubelet.seedDockerImages = [infraContainer];
systemd.services.kubelet-bootstrap = {
description = "Boostrap Kubelet";
wantedBy = ["kubernetes.target"];
after = ["docker.service" "network.target"];
path = with pkgs; [ docker ];
script = ''
${concatMapStrings (img: ''
echo "Seeding docker image: ${img}"
docker load <${img}
'') cfg.kubelet.seedDockerImages}
rm /opt/cni/bin/* || true
${concatMapStrings (package: ''
echo "Linking cni package: ${package}"
ln -fs ${package}/bin/* /opt/cni/bin
'') cfg.kubelet.cni.packages}
'';
serviceConfig = {
Slice = "kubernetes.slice";
Type = "oneshot";
};
};
systemd.services.kubelet = {
description = "Kubernetes Kubelet Service";
wantedBy = [ "kubernetes.target" ];
after = [ "network.target" "docker.service" "kube-apiserver.service" "kubelet-bootstrap.service" ];
path = with pkgs; [ gitMinimal openssh docker utillinux iproute ethtool thin-provisioning-tools iptables socat ] ++ cfg.path;
serviceConfig = {
Slice = "kubernetes.slice";
ExecStart = ''${cfg.package}/bin/kubelet \
${optionalString (taints != "")
"--register-with-taints=${taints}"} \
--kubeconfig=${mkKubeConfig "kubelet" cfg.kubelet.kubeconfig} \
--config=${kubeletConfig} \
--address=${cfg.kubelet.address} \
--port=${toString cfg.kubelet.port} \
--register-node=${boolToString cfg.kubelet.registerNode} \
${optionalString (cfg.kubelet.tlsCertFile != null)
"--tls-cert-file=${cfg.kubelet.tlsCertFile}"} \
${optionalString (cfg.kubelet.tlsKeyFile != null)
"--tls-private-key-file=${cfg.kubelet.tlsKeyFile}"} \
${optionalString (cfg.kubelet.clientCaFile != null)
"--client-ca-file=${cfg.kubelet.clientCaFile}"} \
--authentication-token-webhook \
--authentication-token-webhook-cache-ttl="10s" \
--authorization-mode=Webhook \
--healthz-bind-address=${cfg.kubelet.healthz.bind} \
--healthz-port=${toString cfg.kubelet.healthz.port} \
--hostname-override=${cfg.kubelet.hostname} \
--allow-privileged=${boolToString cfg.kubelet.allowPrivileged} \
--root-dir=${cfg.dataDir} \
--cadvisor_port=${toString cfg.kubelet.cadvisorPort} \
${optionalString (cfg.kubelet.clusterDns != "")
"--cluster-dns=${cfg.kubelet.clusterDns}"} \
${optionalString (cfg.kubelet.clusterDomain != "")
"--cluster-domain=${cfg.kubelet.clusterDomain}"} \
--pod-infra-container-image=pause \
${optionalString (cfg.kubelet.networkPlugin != null)
"--network-plugin=${cfg.kubelet.networkPlugin}"} \
--cni-conf-dir=${cniConfig} \
--hairpin-mode=hairpin-veth \
${optionalString (cfg.kubelet.nodeIp != null)
"--node-ip=${cfg.kubelet.nodeIp}"} \
${optionalString (cfg.kubelet.featureGates != [])
"--feature-gates=${concatMapStringsSep "," (feature: "${feature}=true") cfg.kubelet.featureGates}"} \
${optionalString cfg.verbose "--v=6 --log_flush_frequency=1s"} \
${cfg.kubelet.extraOpts}
'';
WorkingDirectory = cfg.dataDir;
};
};
# Allways include cni plugins
services.kubernetes.kubelet.cni.packages = [pkgs.cni-plugins];
boot.kernelModules = ["br_netfilter"];
services.kubernetes.kubelet.kubeconfig = kubeConfigDefaults;
})
(mkIf (cfg.kubelet.applyManifests && cfg.kubelet.enable) {
environment.etc = mapAttrs' (name: manifest:
nameValuePair "kubernetes/manifests/${name}.json" {
text = builtins.toJSON manifest;
mode = "0755";
}
) cfg.kubelet.manifests;
})
(mkIf (cfg.kubelet.unschedulable && cfg.kubelet.enable) {
services.kubernetes.kubelet.taints.unschedulable = {
value = "true";
effect = "NoSchedule";
};
})
(mkIf cfg.apiserver.enable {
systemd.services.kube-apiserver = {
description = "Kubernetes Kubelet Service";
wantedBy = [ "kubernetes.target" ];
after = [ "network.target" "docker.service" ];
serviceConfig = {
Slice = "kubernetes.slice";
ExecStart = ''${cfg.package}/bin/kube-apiserver \
--etcd-servers=${concatStringsSep "," cfg.etcd.servers} \
${optionalString (cfg.etcd.caFile != null)
"--etcd-cafile=${cfg.etcd.caFile}"} \
${optionalString (cfg.etcd.certFile != null)
"--etcd-certfile=${cfg.etcd.certFile}"} \
${optionalString (cfg.etcd.keyFile != null)
"--etcd-keyfile=${cfg.etcd.keyFile}"} \
--insecure-port=${toString cfg.apiserver.port} \
--bind-address=${toString cfg.apiserver.address} \
${optionalString (cfg.apiserver.advertiseAddress != null)
"--advertise-address=${cfg.apiserver.advertiseAddress}"} \
--allow-privileged=${boolToString cfg.apiserver.allowPrivileged}\
${optionalString (cfg.apiserver.tlsCertFile != null)
"--tls-cert-file=${cfg.apiserver.tlsCertFile}"} \
${optionalString (cfg.apiserver.tlsKeyFile != null)
"--tls-private-key-file=${cfg.apiserver.tlsKeyFile}"} \
${optionalString (cfg.apiserver.tokenAuthFile != null)
"--token-auth-file=${cfg.apiserver.tokenAuthFile}"} \
${optionalString (cfg.apiserver.basicAuthFile != null)
"--basic-auth-file=${cfg.apiserver.basicAuthFile}"} \
--kubelet-https=${if cfg.apiserver.kubeletHttps then "true" else "false"} \
${optionalString (cfg.apiserver.kubeletClientCaFile != null)
"--kubelet-certificate-authority=${cfg.apiserver.kubeletClientCaFile}"} \
${optionalString (cfg.apiserver.kubeletClientCertFile != null)
"--kubelet-client-certificate=${cfg.apiserver.kubeletClientCertFile}"} \
${optionalString (cfg.apiserver.kubeletClientKeyFile != null)
"--kubelet-client-key=${cfg.apiserver.kubeletClientKeyFile}"} \
${optionalString (cfg.apiserver.clientCaFile != null)
"--client-ca-file=${cfg.apiserver.clientCaFile}"} \
--authorization-mode=${concatStringsSep "," cfg.apiserver.authorizationMode} \
${optionalString (elem "ABAC" cfg.apiserver.authorizationMode)
"--authorization-policy-file=${
pkgs.writeText "kube-auth-policy.jsonl"
(concatMapStringsSep "\n" (l: builtins.toJSON l) cfg.apiserver.authorizationPolicy)
}"
} \
--secure-port=${toString cfg.apiserver.securePort} \
--service-cluster-ip-range=${cfg.apiserver.serviceClusterIpRange} \
${optionalString (cfg.apiserver.runtimeConfig != "")
"--runtime-config=${cfg.apiserver.runtimeConfig}"} \
--enable-admission-plugins=${concatStringsSep "," cfg.apiserver.enableAdmissionPlugins} \
--disable-admission-plugins=${concatStringsSep "," cfg.apiserver.disableAdmissionPlugins} \
${optionalString (cfg.apiserver.serviceAccountKeyFile!=null)
"--service-account-key-file=${cfg.apiserver.serviceAccountKeyFile}"} \
${optionalString cfg.verbose "--v=6"} \
${optionalString cfg.verbose "--log-flush-frequency=1s"} \
--storage-backend=${cfg.apiserver.storageBackend} \
${optionalString (cfg.kubelet.featureGates != [])
"--feature-gates=${concatMapStringsSep "," (feature: "${feature}=true") cfg.kubelet.featureGates}"} \
${cfg.apiserver.extraOpts}
'';
WorkingDirectory = cfg.dataDir;
User = "kubernetes";
Group = "kubernetes";
AmbientCapabilities = "cap_net_bind_service";
Restart = "on-failure";
RestartSec = 5;
};
};
})
(mkIf cfg.scheduler.enable {
systemd.services.kube-scheduler = {
description = "Kubernetes Scheduler Service";
wantedBy = [ "kubernetes.target" ];
after = [ "kube-apiserver.service" ];
serviceConfig = {
Slice = "kubernetes.slice";
ExecStart = ''${cfg.package}/bin/kube-scheduler \
--address=${cfg.scheduler.address} \
--port=${toString cfg.scheduler.port} \
--leader-elect=${boolToString cfg.scheduler.leaderElect} \
--kubeconfig=${mkKubeConfig "kube-scheduler" cfg.scheduler.kubeconfig} \
${optionalString cfg.verbose "--v=6"} \
${optionalString cfg.verbose "--log-flush-frequency=1s"} \
${optionalString (cfg.scheduler.featureGates != [])
"--feature-gates=${concatMapStringsSep "," (feature: "${feature}=true") cfg.scheduler.featureGates}"} \
${cfg.scheduler.extraOpts}
'';
WorkingDirectory = cfg.dataDir;
User = "kubernetes";
Group = "kubernetes";
};
};
services.kubernetes.scheduler.kubeconfig = kubeConfigDefaults;
})
(mkIf cfg.controllerManager.enable {
systemd.services.kube-controller-manager = {
description = "Kubernetes Controller Manager Service";
wantedBy = [ "kubernetes.target" ];
after = [ "kube-apiserver.service" ];
serviceConfig = {
RestartSec = "30s";
Restart = "on-failure";
Slice = "kubernetes.slice";
ExecStart = ''${cfg.package}/bin/kube-controller-manager \
--address=${cfg.controllerManager.address} \
--port=${toString cfg.controllerManager.port} \
--kubeconfig=${mkKubeConfig "kube-controller-manager" cfg.controllerManager.kubeconfig} \
--leader-elect=${boolToString cfg.controllerManager.leaderElect} \
${if (cfg.controllerManager.serviceAccountKeyFile!=null)
then "--service-account-private-key-file=${cfg.controllerManager.serviceAccountKeyFile}"
else "--service-account-private-key-file=/var/run/kubernetes/apiserver.key"} \
${if (cfg.controllerManager.rootCaFile!=null)
then "--root-ca-file=${cfg.controllerManager.rootCaFile}"
else "--root-ca-file=/var/run/kubernetes/apiserver.crt"} \
${optionalString (cfg.clusterCidr!=null)
"--cluster-cidr=${cfg.clusterCidr}"} \
--allocate-node-cidrs=true \
${optionalString (cfg.controllerManager.featureGates != [])
"--feature-gates=${concatMapStringsSep "," (feature: "${feature}=true") cfg.controllerManager.featureGates}"} \
${optionalString cfg.verbose "--v=6"} \
${optionalString cfg.verbose "--log-flush-frequency=1s"} \
${cfg.controllerManager.extraOpts}
'';
WorkingDirectory = cfg.dataDir;
User = "kubernetes";
Group = "kubernetes";
};
path = cfg.path;
};
services.kubernetes.controllerManager.kubeconfig = kubeConfigDefaults;
})
(mkIf cfg.proxy.enable {
systemd.services.kube-proxy = {
description = "Kubernetes Proxy Service";
wantedBy = [ "kubernetes.target" ];
after = [ "kube-apiserver.service" ];
path = [pkgs.iptables pkgs.conntrack_tools];
serviceConfig = {
Slice = "kubernetes.slice";
ExecStart = ''${cfg.package}/bin/kube-proxy \
--kubeconfig=${mkKubeConfig "kube-proxy" cfg.proxy.kubeconfig} \
--bind-address=${cfg.proxy.address} \
${optionalString (cfg.proxy.featureGates != [])
"--feature-gates=${concatMapStringsSep "," (feature: "${feature}=true") cfg.proxy.featureGates}"} \
${optionalString cfg.verbose "--v=6"} \
${optionalString cfg.verbose "--log-flush-frequency=1s"} \
${optionalString (cfg.clusterCidr!=null)
"--cluster-cidr=${cfg.clusterCidr}"} \
${cfg.proxy.extraOpts}
'';
WorkingDirectory = cfg.dataDir;
};
};
# kube-proxy needs iptables
networking.firewall.enable = mkDefault true;
services.kubernetes.proxy.kubeconfig = kubeConfigDefaults;
})
(mkIf (any (el: el == "master") cfg.roles) {
virtualisation.docker.enable = mkDefault true;
services.kubernetes.kubelet.enable = mkDefault true;
services.kubernetes.kubelet.allowPrivileged = mkDefault true;
services.kubernetes.kubelet.applyManifests = mkDefault true;
services.kubernetes.apiserver.enable = mkDefault true;
services.kubernetes.scheduler.enable = mkDefault true;
services.kubernetes.controllerManager.enable = mkDefault true;
services.etcd.enable = mkDefault (cfg.etcd.servers == ["http://127.0.0.1:2379"]);
services.kubernetes.addonManager.enable = mkDefault true;
services.kubernetes.proxy.enable = mkDefault true;
})
# if this node is only a master make it unschedulable by default
(mkIf (all (el: el == "master") cfg.roles) {
services.kubernetes.kubelet.unschedulable = mkDefault true;
})
(mkIf (any (el: el == "node") cfg.roles) {
virtualisation.docker = {
enable = mkDefault true;
# kubernetes needs access to logs
logDriver = mkDefault "json-file";
# iptables must be disabled for kubernetes
extraOptions = "--iptables=false --ip-masq=false";
};
services.kubernetes.kubelet.enable = mkDefault true;
services.kubernetes.proxy.enable = mkDefault true;
})
(mkIf cfg.addonManager.enable {
environment.etc."kubernetes/addons".source = "${addons}/";
systemd.services.kube-addon-manager = {
description = "Kubernetes addon manager";
wantedBy = [ "kubernetes.target" ];
after = [ "kube-apiserver.service" ];
environment.ADDON_PATH = "/etc/kubernetes/addons/";
serviceConfig = {
Slice = "kubernetes.slice";
ExecStart = "${cfg.package}/bin/kube-addons";
WorkingDirectory = cfg.dataDir;
User = "kubernetes";
Group = "kubernetes";
};
};
})
(mkIf (
cfg.apiserver.enable ||
cfg.scheduler.enable ||
cfg.controllerManager.enable ||
cfg.kubelet.enable ||
cfg.proxy.enable
) {
systemd.targets.kubernetes = {
description = "Kubernetes";
wantedBy = [ "multi-user.target" ];
};
systemd.tmpfiles.rules = [
"d /opt/cni/bin 0755 root root -"
"d /var/run/kubernetes 0755 kubernetes kubernetes -"
"d /var/lib/kubernetes 0755 kubernetes kubernetes -"
];
environment.systemPackages = [ cfg.package ];
users.extraUsers = singleton {
name = "kubernetes";
uid = config.ids.uids.kubernetes;
description = "Kubernetes user";
extraGroups = [ "docker" ];
group = "kubernetes";
home = cfg.dataDir;
createHome = true;
};
users.extraGroups.kubernetes.gid = config.ids.gids.kubernetes;
# dns addon is enabled by default
services.kubernetes.addons.dns.enable = mkDefault true;
})
(mkIf cfg.flannel.enable {
services.flannel = {
enable = mkDefault true;
network = mkDefault cfg.clusterCidr;
etcd = mkDefault {
endpoints = cfg.etcd.servers;
inherit (cfg.etcd) caFile certFile keyFile;
};
};
services.kubernetes.kubelet = {
networkPlugin = mkDefault "cni";
cni.config = mkDefault [{
name = "mynet";
type = "flannel";
delegate = {
isDefaultGateway = true;
bridge = "docker0";
};
}];
};
systemd.services."mk-docker-opts" = {
description = "Pre-Docker Actions";
wantedBy = [ "flannel.service" ];
before = [ "docker.service" ];
after = [ "flannel.service" ];
path = [ pkgs.gawk pkgs.gnugrep ];
script = ''
mkdir -p /run/flannel
${mkDockerOpts}/mk-docker-opts -d /run/flannel/docker
'';
serviceConfig.Type = "oneshot";
};
systemd.services.docker.serviceConfig.EnvironmentFile = "/run/flannel/docker";
# read environment variables generated by mk-docker-opts
virtualisation.docker.extraOptions = "$DOCKER_OPTS";
networking.firewall.allowedUDPPorts = [
8285 # flannel udp
8472 # flannel vxlan
];
})
];
}