635 lines
20 KiB
Nix
635 lines
20 KiB
Nix
{ config, lib, pkgs, ... }:
|
|
|
|
with lib;
|
|
|
|
let
|
|
cfg = config.services.kubernetes;
|
|
|
|
in {
|
|
|
|
###### interface
|
|
|
|
options.services.kubernetes = {
|
|
package = mkOption {
|
|
description = "Kubernetes package to use.";
|
|
type = types.package;
|
|
};
|
|
|
|
verbose = mkOption {
|
|
description = "Kubernetes enable verbose mode for debugging";
|
|
default = false;
|
|
type = types.bool;
|
|
};
|
|
|
|
etcdServers = mkOption {
|
|
description = "Kubernetes list of etcd servers to watch.";
|
|
default = [ "127.0.0.1:4001" ];
|
|
type = types.listOf types.str;
|
|
};
|
|
|
|
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"]);
|
|
};
|
|
|
|
dataDir = mkOption {
|
|
description = "Kubernetes root directory for managing kubelet files.";
|
|
default = "/var/lib/kubernetes";
|
|
type = types.path;
|
|
};
|
|
|
|
dockerCfg = mkOption {
|
|
description = "Kubernetes contents of dockercfg file.";
|
|
default = "";
|
|
type = types.lines;
|
|
};
|
|
|
|
apiserver = {
|
|
enable = mkOption {
|
|
description = "Whether to enable kubernetes apiserver.";
|
|
default = false;
|
|
type = types.bool;
|
|
};
|
|
|
|
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;
|
|
};
|
|
|
|
port = mkOption {
|
|
description = "Kubernetes apiserver listening port.";
|
|
default = 8080;
|
|
type = types.int;
|
|
};
|
|
|
|
securePort = mkOption {
|
|
description = "Kubernetes apiserver secure port.";
|
|
default = 6443;
|
|
type = types.int;
|
|
};
|
|
|
|
tlsCertFile = mkOption {
|
|
description = "Kubernetes apiserver certificate file.";
|
|
default = "";
|
|
type = types.str;
|
|
};
|
|
|
|
tlsPrivateKeyFile = mkOption {
|
|
description = "Kubernetes apiserver private key file.";
|
|
default = "";
|
|
type = types.str;
|
|
};
|
|
|
|
clientCaFile = mkOption {
|
|
description = "Kubernetes apiserver CA file for client auth.";
|
|
default = "";
|
|
type = types.str;
|
|
};
|
|
|
|
tokenAuth = mkOption {
|
|
description = ''
|
|
Kubernetes apiserver token authentication file. See
|
|
<link xlink:href="http://kubernetes.io/v1.0/docs/admin/authentication.html"/>
|
|
'';
|
|
default = {};
|
|
example = literalExample ''
|
|
{
|
|
alice = "abc123";
|
|
bob = "xyz987";
|
|
}
|
|
'';
|
|
type = types.attrsOf types.str;
|
|
};
|
|
|
|
authorizationMode = mkOption {
|
|
description = ''
|
|
Kubernetes apiserver authorization mode (AlwaysAllow/AlwaysDeny/ABAC). See
|
|
<link xlink:href="http://kubernetes.io/v1.0/docs/admin/authorization.html"/>
|
|
'';
|
|
default = "AlwaysAllow";
|
|
type = types.enum ["AlwaysAllow" "AlwaysDeny" "ABAC"];
|
|
};
|
|
|
|
authorizationPolicy = mkOption {
|
|
description = ''
|
|
Kubernetes apiserver authorization policy file. See
|
|
<link xlink:href="http://kubernetes.io/v1.0/docs/admin/authorization.html"/>
|
|
'';
|
|
default = [];
|
|
example = literalExample ''
|
|
[
|
|
{user = "admin";}
|
|
{user = "scheduler"; readonly = true; kind= "pods";}
|
|
{user = "scheduler"; kind = "bindings";}
|
|
{user = "kubelet"; readonly = true; kind = "bindings";}
|
|
{user = "kubelet"; kind = "events";}
|
|
{user= "alice"; ns = "projectCaribou";}
|
|
{user = "bob"; readonly = true; ns = "projectCaribou";}
|
|
]
|
|
'';
|
|
type = types.listOf types.attrs;
|
|
};
|
|
|
|
allowPrivileged = mkOption {
|
|
description = "Whether to allow privileged containers on kubernetes.";
|
|
default = false;
|
|
type = types.bool;
|
|
};
|
|
|
|
portalNet = mkOption {
|
|
description = "Kubernetes CIDR notation IP range from which to assign portal IPs";
|
|
default = "10.10.10.10/16";
|
|
type = types.str;
|
|
};
|
|
|
|
runtimeConfig = mkOption {
|
|
description = ''
|
|
Api runtime configuration. See
|
|
<link xlink:href="http://kubernetes.io/v1.0/docs/admin/cluster-management.html"/>
|
|
'';
|
|
default = "";
|
|
example = "api/all=false,api/v1=true";
|
|
type = types.str;
|
|
};
|
|
|
|
admissionControl = mkOption {
|
|
description = ''
|
|
Kubernetes admission control plugins to use. See
|
|
<link xlink:href="http://kubernetes.io/v1.0/docs/admin/admission-controllers.html"/>
|
|
'';
|
|
default = ["AlwaysAdmit"];
|
|
example = [
|
|
"NamespaceLifecycle" "NamespaceExists" "LimitRanger"
|
|
"SecurityContextDeny" "ServiceAccount" "ResourceQuota"
|
|
];
|
|
type = types.listOf types.str;
|
|
};
|
|
|
|
serviceAccountKey = mkOption {
|
|
description = ''
|
|
Kubernetes apiserver PEM-encoded x509 RSA private or public key file,
|
|
used to verify ServiceAccount tokens.
|
|
'';
|
|
default = null;
|
|
type = types.nullOr types.path;
|
|
};
|
|
|
|
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;
|
|
};
|
|
|
|
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;
|
|
};
|
|
|
|
master = mkOption {
|
|
description = "Kubernetes apiserver address";
|
|
default = "${cfg.apiserver.address}:${toString cfg.apiserver.port}";
|
|
type = types.str;
|
|
};
|
|
|
|
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;
|
|
};
|
|
|
|
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;
|
|
};
|
|
|
|
master = mkOption {
|
|
description = "Kubernetes apiserver address";
|
|
default = "${cfg.apiserver.address}:${toString cfg.apiserver.port}";
|
|
type = types.str;
|
|
};
|
|
|
|
serviceAccountPrivateKey = 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 = null;
|
|
type = types.nullOr types.path;
|
|
};
|
|
|
|
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;
|
|
};
|
|
|
|
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;
|
|
};
|
|
|
|
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 = false;
|
|
type = types.bool;
|
|
};
|
|
|
|
apiServers = mkOption {
|
|
description = ''
|
|
Kubernetes kubelet list of Kubernetes API servers for publishing events,
|
|
and reading pods and services.
|
|
'';
|
|
default = ["${cfg.apiserver.address}:${toString cfg.apiserver.port}"];
|
|
type = types.listOf types.str;
|
|
};
|
|
|
|
cadvisorPort = mkOption {
|
|
description = "Kubernetes kubelet local cadvisor port.";
|
|
default = 4194;
|
|
type = types.int;
|
|
};
|
|
|
|
clusterDns = mkOption {
|
|
description = "Use alternative dns.";
|
|
default = "";
|
|
type = types.str;
|
|
};
|
|
|
|
clusterDomain = mkOption {
|
|
description = "Use alternative domain.";
|
|
default = "kubernetes.io";
|
|
type = types.str;
|
|
};
|
|
|
|
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;
|
|
};
|
|
|
|
address = mkOption {
|
|
description = "Kubernetes proxy listening address.";
|
|
default = "0.0.0.0";
|
|
type = types.str;
|
|
};
|
|
|
|
master = mkOption {
|
|
description = "Kubernetes apiserver address";
|
|
default = "${cfg.apiserver.address}:${toString cfg.apiserver.port}";
|
|
type = types.str;
|
|
};
|
|
|
|
extraOpts = mkOption {
|
|
description = "Kubernetes proxy extra command line options.";
|
|
default = "";
|
|
type = types.str;
|
|
};
|
|
};
|
|
|
|
kube2sky = {
|
|
enable = mkEnableOption "Whether to enable kube2sky dns service.";
|
|
|
|
domain = mkOption {
|
|
description = "Kuberntes kube2sky domain under which all DNS names will be hosted.";
|
|
default = cfg.kubelet.clusterDomain;
|
|
type = types.str;
|
|
};
|
|
|
|
master = mkOption {
|
|
description = "Kubernetes apiserver address";
|
|
default = "${cfg.apiserver.address}:${toString cfg.apiserver.port}";
|
|
type = types.str;
|
|
};
|
|
|
|
extraOpts = mkOption {
|
|
description = "Kubernetes kube2sky extra command line options.";
|
|
default = "";
|
|
type = types.str;
|
|
};
|
|
};
|
|
};
|
|
|
|
###### implementation
|
|
|
|
config = mkMerge [
|
|
(mkIf cfg.apiserver.enable {
|
|
systemd.services.kube-apiserver = {
|
|
description = "Kubernetes Api Server";
|
|
wantedBy = [ "multi-user.target" ];
|
|
requires = ["kubernetes-setup.service"];
|
|
after = [ "network-interfaces.target" "etcd.service" ];
|
|
serviceConfig = {
|
|
ExecStart = let
|
|
authorizationPolicyFile =
|
|
pkgs.writeText "kubernetes-policy"
|
|
(builtins.toJSON cfg.apiserver.authorizationPolicy);
|
|
tokenAuthFile =
|
|
pkgs.writeText "kubernetes-auth"
|
|
(concatImapStringsSep "\n" (i: v: v + "," + (toString i))
|
|
(mapAttrsToList (name: token: token + "," + name) cfg.apiserver.tokenAuth));
|
|
in ''${cfg.package}/bin/kube-apiserver \
|
|
--etcd-servers=${concatMapStringsSep "," (f: "http://${f}") cfg.etcdServers} \
|
|
--insecure-bind-address=${cfg.apiserver.address} \
|
|
--insecure-port=${toString cfg.apiserver.port} \
|
|
--bind-address=${cfg.apiserver.publicAddress} \
|
|
--allow-privileged=${if cfg.apiserver.allowPrivileged then "true" else "false"} \
|
|
${optionalString (cfg.apiserver.tlsCertFile!="")
|
|
"--tls-cert-file=${cfg.apiserver.tlsCertFile}"} \
|
|
${optionalString (cfg.apiserver.tlsPrivateKeyFile!="")
|
|
"--tls-private-key-file=${cfg.apiserver.tlsPrivateKeyFile}"} \
|
|
${optionalString (cfg.apiserver.tokenAuth!=[])
|
|
"--token-auth-file=${tokenAuthFile}"} \
|
|
${optionalString (cfg.apiserver.clientCaFile!="")
|
|
"--client-ca-file=${cfg.apiserver.clientCaFile}"} \
|
|
--authorization-mode=${cfg.apiserver.authorizationMode} \
|
|
${optionalString (cfg.apiserver.authorizationMode == "ABAC")
|
|
"--authorization-policy-file=${authorizationPolicyFile}"} \
|
|
--secure-port=${toString cfg.apiserver.securePort} \
|
|
--service-cluster-ip-range=${cfg.apiserver.portalNet} \
|
|
${optionalString (cfg.apiserver.runtimeConfig!="")
|
|
"--runtime-config=${cfg.apiserver.runtimeConfig}"} \
|
|
--admission_control=${concatStringsSep "," cfg.apiserver.admissionControl} \
|
|
${optionalString (cfg.apiserver.serviceAccountKey!=null)
|
|
"--service-account-key-file=${cfg.apiserver.serviceAccountKey}"} \
|
|
--logtostderr=true \
|
|
${optionalString cfg.verbose "--v=6 --log-flush-frequency=1s"} \
|
|
${cfg.apiserver.extraOpts}
|
|
'';
|
|
User = "kubernetes";
|
|
};
|
|
};
|
|
})
|
|
|
|
(mkIf cfg.scheduler.enable {
|
|
systemd.services.kube-scheduler = {
|
|
description = "Kubernetes Scheduler Service";
|
|
wantedBy = [ "multi-user.target" ];
|
|
after = [ "network-interfaces.target" "kubernetes-apiserver.service" ];
|
|
serviceConfig = {
|
|
ExecStart = ''${cfg.package}/bin/kube-scheduler \
|
|
--address=${cfg.scheduler.address} \
|
|
--port=${toString cfg.scheduler.port} \
|
|
--master=${cfg.scheduler.master} \
|
|
--logtostderr=true \
|
|
${optionalString cfg.verbose "--v=6 --log-flush-frequency=1s"} \
|
|
${cfg.scheduler.extraOpts}
|
|
'';
|
|
User = "kubernetes";
|
|
};
|
|
};
|
|
})
|
|
|
|
(mkIf cfg.controllerManager.enable {
|
|
systemd.services.kube-controller-manager = {
|
|
description = "Kubernetes Controller Manager Service";
|
|
wantedBy = [ "multi-user.target" ];
|
|
after = [ "network-interfaces.target" "kubernetes-apiserver.service" ];
|
|
serviceConfig = {
|
|
ExecStart = ''${cfg.package}/bin/kube-controller-manager \
|
|
--address=${cfg.controllerManager.address} \
|
|
--port=${toString cfg.controllerManager.port} \
|
|
--master=${cfg.controllerManager.master} \
|
|
${optionalString (cfg.controllerManager.serviceAccountPrivateKey!=null)
|
|
"--service-account-private-key-file=${cfg.controllerManager.serviceAccountPrivateKey}"} \
|
|
${optionalString (cfg.controllerManager.rootCaFile!=null)
|
|
"--root-ca-file=${cfg.controllerManager.rootCaFile}"} \
|
|
--logtostderr=true \
|
|
${optionalString cfg.verbose "--v=6 --log-flush-frequency=1s"} \
|
|
${cfg.controllerManager.extraOpts}
|
|
'';
|
|
User = "kubernetes";
|
|
};
|
|
};
|
|
})
|
|
|
|
(mkIf cfg.kubelet.enable {
|
|
systemd.services.kubelet = {
|
|
description = "Kubernetes Kubelet Service";
|
|
wantedBy = [ "multi-user.target" ];
|
|
requires = ["kubernetes-setup.service"];
|
|
after = [ "network-interfaces.target" "etcd.service" "docker.service" ];
|
|
path = [ pkgs.gitMinimal pkgs.openssh ];
|
|
script = ''
|
|
export PATH="/bin:/sbin:/usr/bin:/usr/sbin:$PATH"
|
|
exec ${cfg.package}/bin/kubelet \
|
|
--api-servers=${concatMapStringsSep "," (f: "http://${f}") cfg.kubelet.apiServers} \
|
|
--register-node=${if cfg.kubelet.registerNode then "true" else "false"} \
|
|
--address=${cfg.kubelet.address} \
|
|
--port=${toString cfg.kubelet.port} \
|
|
--healthz-bind-address=${cfg.kubelet.healthz.bind} \
|
|
--healthz-port=${toString cfg.kubelet.healthz.port} \
|
|
--hostname-override=${cfg.kubelet.hostname} \
|
|
--allow-privileged=${if cfg.kubelet.allowPrivileged then "true" else "false"} \
|
|
--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}''} \
|
|
--logtostderr=true \
|
|
${optionalString cfg.verbose "--v=6 --log_flush_frequency=1s"} \
|
|
${cfg.kubelet.extraOpts}
|
|
'';
|
|
serviceConfig.WorkingDirectory = cfg.dataDir;
|
|
};
|
|
})
|
|
|
|
(mkIf cfg.proxy.enable {
|
|
systemd.services.kube-proxy = {
|
|
description = "Kubernetes Proxy Service";
|
|
wantedBy = [ "multi-user.target" ];
|
|
after = [ "network-interfaces.target" "etcd.service" ];
|
|
serviceConfig = {
|
|
ExecStart = ''${cfg.package}/bin/kube-proxy \
|
|
--master=${cfg.proxy.master} \
|
|
--bind-address=${cfg.proxy.address} \
|
|
--logtostderr=true \
|
|
${optionalString cfg.verbose "--v=6 --log-flush-frequency=1s"} \
|
|
${cfg.proxy.extraOpts}
|
|
'';
|
|
Restart = "always"; # Retry connection
|
|
RestartSec = "5s";
|
|
};
|
|
};
|
|
})
|
|
|
|
(mkIf cfg.kube2sky.enable {
|
|
systemd.services.kube2sky = {
|
|
description = "Kubernetes Dns Bridge Service";
|
|
wantedBy = [ "multi-user.target" ];
|
|
after = [ "network.target" "skydns.service" "etcd.service" "kubernetes-apiserver.service" ];
|
|
serviceConfig = {
|
|
ExecStart = ''${cfg.package}/bin/kube2sky \
|
|
-etcd-server=http://${head cfg.etcdServers} \
|
|
-domain=${cfg.kube2sky.domain} \
|
|
-kube_master_url=http://${cfg.kube2sky.master} \
|
|
-logtostderr=true \
|
|
${optionalString cfg.verbose "--v=6 --log-flush-frequency=1s"} \
|
|
${cfg.kube2sky.extraOpts}
|
|
'';
|
|
User = "kubernetes";
|
|
};
|
|
};
|
|
})
|
|
|
|
(mkIf (any (el: el == "master") cfg.roles) {
|
|
services.kubernetes.apiserver.enable = mkDefault true;
|
|
services.kubernetes.scheduler.enable = mkDefault true;
|
|
services.kubernetes.controllerManager.enable = mkDefault true;
|
|
services.kubernetes.kube2sky.enable = mkDefault true;
|
|
})
|
|
|
|
(mkIf (any (el: el == "node") cfg.roles) {
|
|
virtualisation.docker.enable = mkDefault true;
|
|
services.kubernetes.kubelet.enable = mkDefault true;
|
|
services.kubernetes.proxy.enable = mkDefault true;
|
|
})
|
|
|
|
(mkIf (any (el: el == "node" || el == "master") cfg.roles) {
|
|
services.etcd.enable = mkDefault true;
|
|
|
|
services.skydns.enable = mkDefault true;
|
|
services.skydns.domain = mkDefault cfg.kubelet.clusterDomain;
|
|
})
|
|
|
|
(mkIf (
|
|
cfg.apiserver.enable ||
|
|
cfg.scheduler.enable ||
|
|
cfg.controllerManager.enable ||
|
|
cfg.kubelet.enable ||
|
|
cfg.proxy.enable
|
|
) {
|
|
systemd.services.kubernetes-setup = {
|
|
description = "Kubernetes setup.";
|
|
serviceConfig.Type = "oneshot";
|
|
script = ''
|
|
mkdir -p /var/run/kubernetes
|
|
chown kubernetes /var/lib/kubernetes
|
|
|
|
rm ${cfg.dataDir}/.dockercfg || true
|
|
ln -fs ${pkgs.writeText "kubernetes-dockercfg" cfg.dockerCfg} ${cfg.dataDir}/.dockercfg
|
|
'';
|
|
};
|
|
|
|
services.kubernetes.package = mkDefault pkgs.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;
|
|
})
|
|
|
|
];
|
|
}
|