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kubernetes module: support for kubernetes 1.4

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This commit is contained in:
Jaka Hudoklin 2016-11-16 16:29:35 +01:00
parent 8ef3eaeb4e
commit 5bc7ae7adb
5 changed files with 843 additions and 362 deletions
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608
nixos/modules/services/cluster/kubernetes.nix
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@ -5,28 +5,62 @@ with lib;
let
cfg = config.services.kubernetes;
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";
};
kubeconfig = pkgs.writeText "kubeconfig" (builtins.toJSON {
apiVersion = "v1";
kind = "Config";
clusters = [{
name = "local";
cluster.certificate-authority = cfg.kubeconfig.caFile;
cluster.server = cfg.kubeconfig.server;
}];
users = [{
name = "kubelet";
user = {
client-certificate = cfg.kubeconfig.certFile;
client-key = cfg.kubeconfig.keyFile;
};
}];
contexts = [{
context = {
cluster = "local";
user = "kubelet";
};
current-context = "kubelet-context";
}];
});
policyFile = pkgs.writeText "kube-policy"
concatStringsSep "\n" (map (builtins.toJSON cfg.apiserver.authorizationPolicy));
cniConfig = pkgs.buildEnv {
name = "kubernetes-cni-config";
paths = imap (i: entry:
pkgs.writeTextDir "${10+i}-${entry.type}.conf" (builtins.toJSON entry)
) cfg.kubelet.cni.config;
};
manifests = pkgs.buildEnv {
name = "kubernetes-manifests";
paths = mapAttrsToList (name: manifest:
pkgs.writeTextDir "${name}.json" (builtins.toJSON manifest)
) cfg.kubelet.manifests;
};
in {
###### interface
options.services.kubernetes = {
package = mkOption {
description = "Kubernetes package to use.";
type = types.package;
};
verbose = mkOption {
description = "Kubernetes enable verbose mode for debugging";
default = false;
type = types.bool;
};
etcdServers = mkOption {
description = "Kubernetes list of etcd servers to watch.";
default = [ "127.0.0.1:2379" ];
type = types.listOf types.str;
};
roles = mkOption {
description = ''
Kubernetes role that this machine should take.
@ -38,18 +72,76 @@ in {
type = types.listOf (types.enum ["master" "node"]);
};
package = mkOption {
description = "Kubernetes package to use.";
type = types.package;
default = pkgs.kubernetes;
};
verbose = mkOption {
description = "Kubernetes enable verbose mode for debugging";
default = false;
type = types.bool;
};
etcd = {
servers = mkOption {
description = "List of etcd servers. By default etcd is started, except if this option is changed.";
default = ["http://127.0.0.1:2379"];
type = types.listOf types.str;
};
keyFile = mkOption {
description = "Etcd key file";
default = null;
type = types.nullOr types.path;
};
certFile = mkOption {
description = "Etcd cert file";
default = null;
type = types.nullOr types.path;
};
caFile = mkOption {
description = "Etcd ca file";
default = null;
type = types.nullOr types.path;
};
};
kubeconfig = {
server = mkOption {
description = "Kubernetes apiserver server address";
default = "http://${cfg.apiserver.address}:${toString cfg.apiserver.port}";
type = types.str;
};
caFile = mkOption {
description = "Certificate authrority file to use to connect to kuberentes apiserver";
type = types.nullOr types.path;
default = null;
};
certFile = mkOption {
description = "Client certificate file to use to connect to kubernetes";
type = types.nullOr types.path;
default = null;
};
keyFile = mkOption {
description = "Client key file to use to connect to kubernetes";
type = types.nullOr types.path;
default = null;
};
};
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.";
@ -72,6 +164,16 @@ in {
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;
};
port = mkOption {
description = "Kubernetes apiserver listening port.";
default = 8080;
@ -80,41 +182,36 @@ in {
securePort = mkOption {
description = "Kubernetes apiserver secure port.";
default = 6443;
default = 443;
type = types.int;
};
tlsCertFile = mkOption {
description = "Kubernetes apiserver certificate file.";
default = "";
type = types.str;
default = null;
type = types.nullOr types.path;
};
tlsPrivateKeyFile = mkOption {
tlsKeyFile = mkOption {
description = "Kubernetes apiserver private key file.";
default = "";
type = types.str;
default = null;
type = types.nullOr types.path;
};
clientCaFile = mkOption {
description = "Kubernetes apiserver CA file for client auth.";
default = "";
type = types.str;
default = null;
type = types.nullOr types.path;
};
tokenAuth = mkOption {
description = ''
Kubernetes apiserver token authentication file. See
<link xlink:href="http://kubernetes.io/v1.0/docs/admin/authentication.html"/>
<link xlink:href="http://kubernetes.io/docs/admin/authentication.html"/>
'';
default = {};
example = literalExample ''
{
alice = "abc123";
bob = "xyz987";
}
'';
type = types.attrsOf types.str;
default = null;
example = ''token,user,uid,"group1,group2,group3"'';
type = types.nullOr types.lines;
};
authorizationMode = mkOption {
@ -148,13 +245,13 @@ in {
allowPrivileged = mkOption {
description = "Whether to allow privileged containers on kubernetes.";
default = false;
default = true;
type = types.bool;
};
portalNet = mkOption {
description = "Kubernetes CIDR notation IP range from which to assign portal IPs";
default = "10.10.10.10/16";
default = "10.10.10.10/24";
type = types.str;
};
@ -171,9 +268,9 @@ in {
admissionControl = mkOption {
description = ''
Kubernetes admission control plugins to use. See
<link xlink:href="http://kubernetes.io/v1.0/docs/admin/admission-controllers.html"/>
<link xlink:href="http://kubernetes.io/docs/admin/admission-controllers/"/>
'';
default = ["AlwaysAdmit"];
default = ["NamespaceLifecycle" "LimitRanger" "ServiceAccount" "ResourceQuota"];
example = [
"NamespaceLifecycle" "NamespaceExists" "LimitRanger"
"SecurityContextDeny" "ServiceAccount" "ResourceQuota"
@ -181,15 +278,40 @@ in {
type = types.listOf types.str;
};
serviceAccountKey = mkOption {
serviceAccountKeyFile = mkOption {
description = ''
Kubernetes apiserver PEM-encoded x509 RSA private or public key file,
used to verify ServiceAccount tokens.
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 = null;
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 = "";
@ -216,10 +338,10 @@ in {
type = types.int;
};
master = mkOption {
description = "Kubernetes apiserver address";
default = "${cfg.apiserver.address}:${toString cfg.apiserver.port}";
type = types.str;
leaderElect = mkOption {
description = "Whether to start leader election before executing main loop";
type = types.bool;
default = false;
};
extraOpts = mkOption {
@ -248,13 +370,13 @@ in {
type = types.int;
};
master = mkOption {
description = "Kubernetes apiserver address";
default = "${cfg.apiserver.address}:${toString cfg.apiserver.port}";
type = types.str;
leaderElect = mkOption {
description = "Whether to start leader election before executing main loop";
type = types.bool;
default = false;
};
serviceAccountPrivateKey = mkOption {
serviceAccountKeyFile = mkOption {
description = ''
Kubernetes controller manager PEM-encoded private RSA key file used to
sign service account tokens
@ -272,6 +394,12 @@ in {
type = types.nullOr types.path;
};
clusterCidr = mkOption {
description = "Kubernetes controller manager CIDR Range for Pods in cluster";
default = "10.10.0.0/16";
type = types.str;
};
extraOpts = mkOption {
description = "Kubernetes controller manager extra command line options.";
default = "";
@ -292,6 +420,12 @@ in {
type = types.bool;
};
registerSchedulable = mkOption {
description = "Register the node as schedulable. No-op if register-node is false.";
default = true;
type = types.bool;
};
address = mkOption {
description = "Kubernetes kubelet info server listening address.";
default = "0.0.0.0";
@ -304,6 +438,18 @@ in {
type = types.int;
};
tlsCertFile = mkOption {
description = "File containing x509 Certificate for HTTPS.";
default = null;
type = types.nullOr types.path;
};
tlsKeyFile = mkOption {
description = "File containing x509 private key matching tlsCertFile.";
default = null;
type = types.nullOr types.path;
};
healthz = {
bind = mkOption {
description = "Kubernetes kubelet healthz listening address.";
@ -326,19 +472,10 @@ in {
allowPrivileged = mkOption {
description = "Whether to allow kubernetes containers to request privileged mode.";
default = false;
default = true;
type = types.bool;
};
apiServers = mkOption {
description = ''
Kubernetes kubelet list of Kubernetes API servers for publishing events,
and reading pods and services.
'';
default = ["${cfg.apiserver.address}:${toString cfg.apiserver.port}"];
type = types.listOf types.str;
};
cadvisorPort = mkOption {
description = "Kubernetes kubelet local cadvisor port.";
default = 4194;
@ -347,16 +484,62 @@ in {
clusterDns = mkOption {
description = "Use alternative dns.";
default = "";
default = "10.10.1.1";
type = types.str;
};
clusterDomain = mkOption {
description = "Use alternative domain.";
default = "kubernetes.io";
default = "cluster.local";
type = types.str;
};
networkPlugin = mkOption {
description = "Network plugin to use by kubernetes";
type = types.nullOr (types.enum ["cni" "kubenet"]);
default = "kubenet";
};
cni = {
packages = mkOption {
description = "List of network plugin packages to install";
type = types.listOf types.package;
default = [];
};
config = mkOption {
description = "Kubernetes CNI configuration";
type = types.listOf types.attrs;
default = [];
example = literalExample ''
[{
"cniVersion": "0.2.0",
"name": "mynet",
"type": "bridge",
"bridge": "cni0",
"isGateway": true,
"ipMasq": true,
"ipam": {
"type": "host-local",
"subnet": "10.22.0.0/16",
"routes": [
{ "dst": "0.0.0.0/0" }
]
}
} {
"cniVersion": "0.2.0",
"type": "loopback"
}]
'';
};
};
manifests = mkOption {
description = "List of manifests to bootstrap with kubelet";
type = types.attrsOf types.attrs;
default = {};
};
extraOpts = mkOption {
description = "Kubernetes kubelet extra command line options.";
default = "";
@ -377,12 +560,6 @@ in {
type = types.str;
};
master = mkOption {
description = "Kubernetes apiserver address";
default = "${cfg.apiserver.address}:${toString cfg.apiserver.port}";
type = types.str;
};
extraOpts = mkOption {
description = "Kubernetes proxy extra command line options.";
default = "";
@ -390,23 +567,23 @@ in {
};
};
kube2sky = {
enable = mkEnableOption "Whether to enable kube2sky dns service.";
dns = {
enable = mkEnableOption "kubernetes dns service.";
port = mkOption {
description = "Kubernetes dns listening port";
default = 53;
type = types.int;
};
domain = mkOption {
description = "Kuberntes kube2sky domain under which all DNS names will be hosted.";
description = "Kuberntes dns domain under which to create names.";
default = cfg.kubelet.clusterDomain;
type = types.str;
};
master = mkOption {
description = "Kubernetes apiserver address";
default = "${cfg.apiserver.address}:${toString cfg.apiserver.port}";
type = types.str;
};
extraOpts = mkOption {
description = "Kubernetes kube2sky extra command line options.";
description = "Kubernetes dns extra command line options.";
default = "";
type = types.str;
};
@ -416,50 +593,118 @@ in {
###### implementation
config = mkMerge [
(mkIf cfg.kubelet.enable {
systemd.services.kubelet = {
description = "Kubernetes Kubelet Service";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" "docker.service" "kube-apiserver.service" ];
path = with pkgs; [ gitMinimal openssh docker utillinux iproute ethtool thin-provisioning-tools iptables ];
preStart = ''
docker load < ${infraContainer}
rm /opt/cni/bin/* || true
${concatMapStringsSep "\n" (p: "ln -fs ${p.plugins}/* /opt/cni/bin") cfg.kubelet.cni.packages}
'';
serviceConfig = {
ExecStart = ''${cfg.package}/bin/kubelet \
--pod-manifest-path=${manifests} \
--kubeconfig=${kubeconfig} \
--require-kubeconfig \
--address=${cfg.kubelet.address} \
--port=${toString cfg.kubelet.port} \
--register-node=${if cfg.kubelet.registerNode then "true" else "false"} \
--register-schedulable=${if cfg.kubelet.registerSchedulable then "true" else "false"} \
${optionalString (cfg.kubelet.tlsCertFile != null)
"--tls-cert-file=${cfg.kubelet.tlsCertFile}"} \
${optionalString (cfg.kubelet.tlsKeyFile != null)
"--tls-private-key-file=${cfg.kubelet.tlsKeyFile}"} \
--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}"} \
--pod-infra-container-image=pause \
${optionalString (cfg.kubelet.networkPlugin != null)
"--network-plugin=${cfg.kubelet.networkPlugin}"} \
--cni-conf-dir=${cniConfig} \
--reconcile-cidr \
--hairpin-mode=hairpin-veth \
${optionalString cfg.verbose "--v=6 --log_flush_frequency=1s"} \
${cfg.kubelet.extraOpts}
'';
WorkingDirectory = cfg.dataDir;
};
};
environment.etc = mapAttrs' (name: manifest:
nameValuePair "kubernetes/manifests/${name}.json" {
text = builtins.toJSON manifest;
mode = "0755";
}
) cfg.kubelet.manifests;
# Allways include cni plugins
services.kubernetes.kubelet.cni.packages = [pkgs.cni];
})
(mkIf cfg.apiserver.enable {
systemd.services.kube-apiserver = {
description = "Kubernetes Api Server";
description = "Kubernetes Kubelet Service";
wantedBy = [ "multi-user.target" ];
requires = ["kubernetes-setup.service"];
after = [ "network.target" "etcd.service" "kubernetes-setup.service" ];
after = [ "network.target" "docker.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} \
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=${toString cfg.apiserver.port} \
--bind-address=${cfg.apiserver.publicAddress} \
--bind-address=0.0.0.0 \
${optionalString (cfg.apiserver.advertiseAddress != null)
"--advertise-address=${cfg.apiserver.advertiseAddress}"} \
--allow-privileged=${if cfg.apiserver.allowPrivileged then "true" else "false"} \
${optionalString (cfg.apiserver.tlsCertFile!="")
${optionalString (cfg.apiserver.tlsCertFile != null)
"--tls-cert-file=${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!="")
${optionalString (cfg.apiserver.tlsKeyFile != null)
"--tls-private-key-file=${cfg.apiserver.tlsKeyFile}"} \
${optionalString (cfg.apiserver.tokenAuth != null)
"--token-auth-file=${cfg.apiserver.tokenAuth}"} \
--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=${cfg.apiserver.authorizationMode} \
${optionalString (cfg.apiserver.authorizationMode == "ABAC")
"--authorization-policy-file=${authorizationPolicyFile}"} \
"--authorization-policy-file=${policyFile}"} \
--secure-port=${toString cfg.apiserver.securePort} \
--service-cluster-ip-range=${cfg.apiserver.portalNet} \
${optionalString (cfg.apiserver.runtimeConfig!="")
${optionalString (cfg.apiserver.runtimeConfig != "")
"--runtime-config=${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"} \
${optionalString (cfg.apiserver.serviceAccountKeyFile!=null)
"--service-account-key-file=${cfg.apiserver.serviceAccountKeyFile}"} \
${optionalString cfg.verbose "--v=6"} \
${optionalString cfg.verbose "--log-flush-frequency=1s"} \
${cfg.apiserver.extraOpts}
'';
WorkingDirectory = cfg.dataDir;
User = "kubernetes";
Group = "kubernetes";
AmbientCapabilities = "cap_net_bind_service";
Restart = "on-failure";
RestartSec = 5;
};
};
})
@ -468,17 +713,20 @@ in {
systemd.services.kube-scheduler = {
description = "Kubernetes Scheduler Service";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" "kubernetes-apiserver.service" ];
after = [ "kube-apiserver.service" ];
serviceConfig = {
ExecStart = ''${cfg.package}/bin/kube-scheduler \
--address=${cfg.scheduler.address} \
--port=${toString cfg.scheduler.port} \
--master=${cfg.scheduler.master} \
--logtostderr=true \
${optionalString cfg.verbose "--v=6 --log-flush-frequency=1s"} \
--leader-elect=${if cfg.scheduler.leaderElect then "true" else "false"} \
--kubeconfig=${kubeconfig} \
${optionalString cfg.verbose "--v=6"} \
${optionalString cfg.verbose "--log-flush-frequency=1s"} \
${cfg.scheduler.extraOpts}
'';
WorkingDirectory = cfg.dataDir;
User = "kubernetes";
Group = "kubernetes";
};
};
})
@ -487,113 +735,94 @@ in {
systemd.services.kube-controller-manager = {
description = "Kubernetes Controller Manager Service";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" "kubernetes-apiserver.service" ];
after = [ "kube-apiserver.service" ];
serviceConfig = {
ExecStart = ''${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}"} \
--kubeconfig=${kubeconfig} \
--leader-elect=${if cfg.controllerManager.leaderElect then "true" else "false"} \
${if (cfg.controllerManager.serviceAccountKeyFile!=null)
then "--service-account-private-key-file=${cfg.controllerManager.serviceAccountKeyFile}"
else "--service-account-private-key-file=/var/run/kubernetes/apiserver.key"} \
${optionalString (cfg.controllerManager.rootCaFile!=null)
"--root-ca-file=${cfg.controllerManager.rootCaFile}"} \
--logtostderr=true \
${optionalString cfg.verbose "--v=6 --log-flush-frequency=1s"} \
${optionalString (cfg.controllerManager.clusterCidr!=null)
"--cluster-cidr=${cfg.controllerManager.clusterCidr}"} \
--allocate-node-cidrs=true \
${optionalString cfg.verbose "--v=6"} \
${optionalString cfg.verbose "--log-flush-frequency=1s"} \
${cfg.controllerManager.extraOpts}
'';
WorkingDirectory = cfg.dataDir;
User = "kubernetes";
Group = "kubernetes";
};
};
})
(mkIf cfg.kubelet.enable {
systemd.services.kubelet = {
description = "Kubernetes Kubelet Service";
wantedBy = [ "multi-user.target" ];
requires = ["kubernetes-setup.service"];
after = [ "network.target" "etcd.service" "docker.service" "kubernetes-setup.service" ];
path = [ pkgs.gitMinimal pkgs.openssh ];
script = ''
export PATH="/bin:/sbin:/usr/bin:/usr/sbin:$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"} \
${cfg.kubelet.extraOpts}
'';
serviceConfig.WorkingDirectory = cfg.dataDir;
};
})
(mkIf cfg.proxy.enable {
systemd.services.kube-proxy = {
description = "Kubernetes Proxy Service";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" "etcd.service" ];
after = [ "kube-apiserver.service" ];
path = [pkgs.iptables];
serviceConfig = {
ExecStart = ''${cfg.package}/bin/kube-proxy \
--master=${cfg.proxy.master} \
--kubeconfig=${kubeconfig} \
--bind-address=${cfg.proxy.address} \
--logtostderr=true \
${optionalString cfg.verbose "--v=6 --log-flush-frequency=1s"} \
${cfg.proxy.extraOpts}
${optionalString cfg.verbose "--v=6"} \
${optionalString cfg.verbose "--log-flush-frequency=1s"} \
${cfg.controllerManager.extraOpts}
'';
Restart = "always"; # Retry connection
RestartSec = "5s";
WorkingDirectory = cfg.dataDir;
};
};
})
(mkIf cfg.kube2sky.enable {
systemd.services.kube2sky = {
description = "Kubernetes Dns Bridge Service";
(mkIf cfg.dns.enable {
systemd.services.kube-dns = {
description = "Kubernetes Dns Service";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" "skydns.service" "etcd.service" "kubernetes-apiserver.service" ];
after = [ "kube-apiserver.service" ];
serviceConfig = {
ExecStart = ''${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"} \
${cfg.kube2sky.extraOpts}
ExecStart = ''${cfg.package}/bin/kube-dns \
--kubecfg-file=${kubeconfig} \
--dns-port=${toString cfg.dns.port} \
--domain=${cfg.dns.domain} \
${optionalString cfg.verbose "--v=6"} \
${optionalString cfg.verbose "--log-flush-frequency=1s"} \
${cfg.dns.extraOpts}
'';
WorkingDirectory = cfg.dataDir;
User = "kubernetes";
Group = "kubernetes";
AmbientCapabilities = "cap_net_bind_service";
SendSIGHUP = true;
};
};
})
(mkIf cfg.kubelet.enable {
boot.kernelModules = ["br_netfilter"];
})
(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.apiserver.enable = mkDefault true;
services.kubernetes.scheduler.enable = mkDefault true;
services.kubernetes.controllerManager.enable = mkDefault true;
services.kubernetes.kube2sky.enable = mkDefault true;
services.etcd.enable = mkDefault (cfg.etcd.servers == ["http://127.0.0.1:2379"]);
})
(mkIf (any (el: el == "node") cfg.roles) {
virtualisation.docker.enable = mkDefault true;
virtualisation.docker.logDriver = mkDefault "json-file";
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;
services.kubernetes.dns.enable = mkDefault true;
})
(mkIf (
@ -601,24 +830,16 @@ in {
cfg.scheduler.enable ||
cfg.controllerManager.enable ||
cfg.kubelet.enable ||
cfg.proxy.enable
cfg.proxy.enable ||
cfg.dns.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;
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;
@ -630,6 +851,5 @@ in {
};
users.extraGroups.kubernetes.gid = config.ids.gids.kubernetes;
})
];
}

556
nixos/tests/kubernetes.nix
View File

@ -1,182 +1,408 @@
# This test runs two node kubernetes cluster and checks if simple redis pod works
{ system ? builtins.currentSystem }:
import ./make-test.nix ({ pkgs, ...} : rec {
name = "kubernetes";
meta = with pkgs.stdenv.lib.maintainers; {
maintainers = [ offline ];
with import ../lib/testing.nix { inherit system; };
with import ../lib/qemu-flags.nix;
with pkgs.lib;
let
redisPod = pkgs.writeText "redis-master-pod.json" (builtins.toJSON {
kind = "Pod";
apiVersion = "v1";
metadata.name = "redis";
metadata.labels.name = "redis";
spec.containers = [{
name = "redis";
image = "redis";
args = ["--bind" "0.0.0.0"];
imagePullPolicy = "Never";
ports = [{
name = "redis-server";
containerPort = 6379;
}];
}];
});
redisService = pkgs.writeText "redis-service.json" (builtins.toJSON {
kind = "Service";
apiVersion = "v1";
metadata.name = "redis";
spec = {
ports = [{port = 6379; targetPort = 6379;}];
selector = {name = "redis";};
};
});
redisImage = pkgs.dockerTools.buildImage {
name = "redis";
tag = "latest";
contents = pkgs.redis;
config.Entrypoint = "/bin/redis-server";
};
redisMaster = builtins.toFile "redis-master-pod.yaml" ''
id: redis-master-pod
kind: Pod
apiVersion: v1beta1
desiredState:
manifest:
version: v1beta1
id: redis-master-pod
containers:
- name: master
image: master:5000/nix
cpu: 100
ports:
- name: redis-server
containerPort: 6379
hostPort: 6379
volumeMounts:
- name: nix-store
mountPath: /nix/store
readOnly: true
volumeMounts:
- name: system-profile
mountPath: /bin
readOnly: true
command:
- /bin/redis-server
volumes:
- name: nix-store
source:
hostDir:
path: /nix/store
- name: system-profile
source:
hostDir:
path: /run/current-system/sw/bin
labels:
name: redis
role: master
testSimplePod = ''
$kubernetes->execute("docker load < ${redisImage}");
$kubernetes->waitUntilSucceeds("kubectl create -f ${redisPod}");
$kubernetes->succeed("kubectl create -f ${redisService}");
$kubernetes->waitUntilSucceeds("kubectl get pod redis | grep Running");
$kubernetes->succeed("nc -z \$\(dig \@10.10.0.1 redis.default.svc.cluster.local +short\) 6379");
'';
in {
# This test runs kubernetes on a single node
trivial = makeTest {
name = "kubernetes-trivial";
nodes = {
master =
{ config, pkgs, lib, nodes, ... }:
{
virtualisation.memorySize = 768;
services.kubernetes = {
roles = ["master" "node"];
dockerCfg = ''{"master:5000":{}}'';
controllerManager.machines = ["master" "node"];
apiserver.address = "0.0.0.0";
verbose = true;
nodes = {
kubernetes =
{ config, pkgs, lib, nodes, ... }:
{
virtualisation.memorySize = 768;
virtualisation.diskSize = 2048;
programs.bash.enableCompletion = true;
services.kubernetes.roles = ["master" "node"];
virtualisation.docker.extraOptions = "--iptables=false --ip-masq=false -b cbr0";
networking.bridges.cbr0.interfaces = [];
networking.interfaces.cbr0 = {};
};
virtualisation.docker.extraOptions = "--iptables=false --ip-masq=false -b cbr0 --insecure-registry master:5000";
};
services.etcd = {
listenPeerUrls = ["http://0.0.0.0:7001"];
initialAdvertisePeerUrls = ["http://master:7001"];
initialCluster = ["master=http://master:7001" "node=http://node:7001"];
};
services.dockerRegistry.enable = true;
services.dockerRegistry.host = "0.0.0.0";
services.dockerRegistry.port = 5000;
testScript = ''
startAll;
virtualisation.vlans = [ 1 2 ];
networking.bridges = {
cbr0.interfaces = [ "eth2" ];
};
networking.interfaces = {
cbr0 = {
ipAddress = "10.10.0.1";
prefixLength = 24;
};
eth2.ip4 = lib.mkOverride 0 [ ];
};
networking.localCommands = ''
ip route add 10.10.0.0/16 dev cbr0
ip route flush cache
'';
networking.extraHosts = "127.0.0.1 master";
$kubernetes->waitUntilSucceeds("kubectl get nodes | grep kubernetes | grep Ready");
networking.firewall.enable = false;
#networking.firewall.allowedTCPPorts = [ 4001 7001 ];
environment.systemPackages = [ pkgs.redis ];
};
node =
{ config, pkgs, lib, nodes, ... }:
{
services.kubernetes = {
roles = ["node"];
dockerCfg = ''{"master:5000":{}}'';
kubelet.apiServers = ["master:8080"];
verbose = true;
};
virtualisation.docker.extraOptions = "--iptables=false --ip-masq=false -b cbr0 --insecure-registry master:5000";
services.etcd = {
listenPeerUrls = ["http://0.0.0.0:7001"];
initialAdvertisePeerUrls = ["http://node:7001"];
initialCluster = ["master=http://master:7001" "node=http://node:7001"];
};
virtualisation.vlans = [ 1 2 ];
networking.bridges = {
cbr0.interfaces = [ "eth2" ];
};
networking.interfaces = {
cbr0 = {
ipAddress = "10.10.1.1";
prefixLength = 24;
};
eth2.ip4 = lib.mkOverride 0 [ ];
};
networking.localCommands = ''
ip route add 10.10.0.0/16 dev cbr0
ip route flush cache
'';
networking.extraHosts = "127.0.0.1 node";
networking.firewall.enable = false;
#networking.firewall.allowedTCPPorts = [ 4001 7001 ];
environment.systemPackages = [ pkgs.redis ];
};
client =
{ config, pkgs, nodes, ... }:
{
virtualisation.docker.enable = true;
virtualisation.docker.extraOptions = "--insecure-registry master:5000";
environment.systemPackages = [ pkgs.kubernetes ];
environment.etc."test/redis-master-pod.yaml".source = redisMaster;
environment.etc."test/pause".source = "${pkgs.kubernetes}/bin/kube-pause";
environment.etc."test/Dockerfile".source = pkgs.writeText "Dockerfile" ''
FROM scratch
ADD pause /
ENTRYPOINT ["/pause"]
'';
};
${testSimplePod}
'';
};
testScript = ''
startAll;
cluster = let
runWithOpenSSL = file: cmd: pkgs.runCommand file {
buildInputs = [ pkgs.openssl ];
} cmd;
$master->waitForUnit("kubernetes-apiserver.service");
$master->waitForUnit("kubernetes-scheduler.service");
$master->waitForUnit("kubernetes-controller-manager.service");
$master->waitForUnit("kubernetes-kubelet.service");
$master->waitForUnit("kubernetes-proxy.service");
ca_key = runWithOpenSSL "ca-key.pem" "openssl genrsa -out $out 2048";
ca_pem = runWithOpenSSL "ca.pem" ''
openssl req \
-x509 -new -nodes -key ${ca_key} \
-days 10000 -out $out -subj "/CN=etcd-ca"
'';
etcd_key = runWithOpenSSL "etcd-key.pem" "openssl genrsa -out $out 2048";
etcd_csr = runWithOpenSSL "etcd.csr" ''
openssl req \
-new -key ${etcd_key} \
-out $out -subj "/CN=etcd" \
-config ${openssl_cnf}
'';
etcd_cert = runWithOpenSSL "etcd.pem" ''
openssl x509 \
-req -in ${etcd_csr} \
-CA ${ca_pem} -CAkey ${ca_key} \
-CAcreateserial -out $out \
-days 365 -extensions v3_req \
-extfile ${openssl_cnf}
'';
$node->waitForUnit("kubernetes-kubelet.service");
$node->waitForUnit("kubernetes-proxy.service");
etcd_client_key = runWithOpenSSL "etcd-client-key.pem"
"openssl genrsa -out $out 2048";
$master->waitUntilSucceeds("kubectl get minions | grep master");
$master->waitUntilSucceeds("kubectl get minions | grep node");
etcd_client_csr = runWithOpenSSL "etcd-client-key.pem" ''
openssl req \
-new -key ${etcd_client_key} \
-out $out -subj "/CN=etcd-client" \
-config ${client_openssl_cnf}
'';
$client->waitForUnit("docker.service");
$client->succeed("tar cv --files-from /dev/null | docker import - nix");
$client->succeed("docker tag nix master:5000/nix");
$master->waitForUnit("docker-registry.service");
$client->succeed("docker push master:5000/nix");
$client->succeed("mkdir -p /root/pause");
$client->succeed("cp /etc/test/pause /root/pause/");
$client->succeed("cp /etc/test/Dockerfile /root/pause/");
$client->succeed("cd /root/pause && docker build -t master:5000/pause .");
$client->succeed("docker push master:5000/pause");
etcd_client_cert = runWithOpenSSL "etcd-client.crt" ''
openssl x509 \
-req -in ${etcd_client_csr} \
-CA ${ca_pem} -CAkey ${ca_key} -CAcreateserial \
-out $out -days 365 -extensions v3_req \
-extfile ${client_openssl_cnf}
'';
subtest "simple pod", sub {
$client->succeed("kubectl create -f ${redisMaster} -s http://master:8080");
$client->waitUntilSucceeds("kubectl get pods -s http://master:8080 | grep redis-master | grep -i running");
}
apiserver_key = runWithOpenSSL "apiserver-key.pem" "openssl genrsa -out $out 2048";
'';
})
apiserver_csr = runWithOpenSSL "apiserver.csr" ''
openssl req \
-new -key ${apiserver_key} \
-out $out -subj "/CN=kube-apiserver" \
-config ${apiserver_cnf}
'';
apiserver_cert = runWithOpenSSL "apiserver.pem" ''
openssl x509 \
-req -in ${apiserver_csr} \
-CA ${ca_pem} -CAkey ${ca_key} -CAcreateserial \
-out $out -days 365 -extensions v3_req \
-extfile ${apiserver_cnf}
'';
worker_key = runWithOpenSSL "worker-key.pem" "openssl genrsa -out $out 2048";
worker_csr = runWithOpenSSL "worker.csr" ''
openssl req \
-new -key ${worker_key} \
-out $out -subj "/CN=kube-worker" \
-config ${worker_cnf}
'';
worker_cert = runWithOpenSSL "worker.pem" ''
openssl x509 \
-req -in ${worker_csr} \
-CA ${ca_pem} -CAkey ${ca_key} -CAcreateserial \
-out $out -days 365 -extensions v3_req \
-extfile ${worker_cnf}
'';
openssl_cnf = pkgs.writeText "openssl.cnf" ''
[req]
req_extensions = v3_req
distinguished_name = req_distinguished_name
[req_distinguished_name]
[ v3_req ]
basicConstraints = CA:FALSE
keyUsage = digitalSignature, keyEncipherment
extendedKeyUsage = serverAuth
subjectAltName = @alt_names
[alt_names]
DNS.1 = etcd1
DNS.2 = etcd2
DNS.3 = etcd3
IP.1 = 127.0.0.1
'';
client_openssl_cnf = pkgs.writeText "client-openssl.cnf" ''
[req]
req_extensions = v3_req
distinguished_name = req_distinguished_name
[req_distinguished_name]
[ v3_req ]
basicConstraints = CA:FALSE
keyUsage = digitalSignature, keyEncipherment
extendedKeyUsage = clientAuth
'';
apiserver_cnf = pkgs.writeText "apiserver-openssl.cnf" ''
[req]
req_extensions = v3_req
distinguished_name = req_distinguished_name
[req_distinguished_name]
[ v3_req ]
basicConstraints = CA:FALSE
keyUsage = nonRepudiation, digitalSignature, keyEncipherment
subjectAltName = @alt_names
[alt_names]
DNS.1 = kubernetes
DNS.2 = kubernetes.default
DNS.3 = kubernetes.default.svc
DNS.4 = kubernetes.default.svc.cluster.local
IP.1 = 10.10.10.1
'';
worker_cnf = pkgs.writeText "worker-openssl.cnf" ''
[req]
req_extensions = v3_req
distinguished_name = req_distinguished_name
[req_distinguished_name]
[ v3_req ]
basicConstraints = CA:FALSE
keyUsage = nonRepudiation, digitalSignature, keyEncipherment
subjectAltName = @alt_names
[alt_names]
DNS.1 = kubeWorker1
DNS.2 = kubeWorker2
'';
etcdNodeConfig = {
virtualisation.memorySize = 128;
services = {
etcd = {
enable = true;
keyFile = etcd_key;
certFile = etcd_cert;
trustedCaFile = ca_pem;
peerClientCertAuth = true;
listenClientUrls = ["https://0.0.0.0:2379"];
listenPeerUrls = ["https://0.0.0.0:2380"];
};
};
environment.variables = {
ETCDCTL_CERT_FILE = "${etcd_client_cert}";
ETCDCTL_KEY_FILE = "${etcd_client_key}";
ETCDCTL_CA_FILE = "${ca_pem}";
ETCDCTL_PEERS = "https://127.0.0.1:2379";
};
networking.firewall.allowedTCPPorts = [ 2379 2380 ];
};
kubeConfig = {
virtualisation.diskSize = 2048;
programs.bash.enableCompletion = true;
services.flannel = {
enable = true;
network = "10.10.0.0/16";
iface = "eth1";
etcd = {
endpoints = ["https://etcd1:2379" "https://etcd2:2379" "https://etcd3:2379"];
keyFile = etcd_client_key;
certFile = etcd_client_cert;
caFile = ca_pem;
};
};
# vxlan
networking.firewall.allowedUDPPorts = [ 8472 ];
systemd.services.docker.after = ["flannel.service"];
systemd.services.docker.serviceConfig.EnvironmentFile = "/run/flannel/subnet.env";
virtualisation.docker.extraOptions = "--iptables=false --ip-masq=false --bip $FLANNEL_SUBNET";
services.kubernetes.verbose = true;
services.kubernetes.etcd = {
servers = ["https://etcd1:2379" "https://etcd2:2379" "https://etcd3:2379"];
keyFile = etcd_client_key;
certFile = etcd_client_cert;
caFile = ca_pem;
};
environment.systemPackages = [ pkgs.bind pkgs.tcpdump pkgs.utillinux ];
};
kubeMasterConfig = {pkgs, ...}: {
require = [kubeConfig];
# kube apiserver
networking.firewall.allowedTCPPorts = [ 443 ];
virtualisation.memorySize = 512;
services.kubernetes = {
roles = ["master"];
scheduler.leaderElect = true;
controllerManager.leaderElect = true;
apiserver = {
publicAddress = "0.0.0.0";
advertiseAddress = "192.168.1.8";
tlsKeyFile = apiserver_key;
tlsCertFile = apiserver_cert;
clientCaFile = ca_pem;
kubeletClientCaFile = ca_pem;
kubeletClientKeyFile = worker_key;
kubeletClientCertFile = worker_cert;
};
};
};
kubeWorkerConfig = { pkgs, ... }: {
require = [kubeConfig];
virtualisation.memorySize = 512;
# kubelet
networking.firewall.allowedTCPPorts = [ 10250 ];
services.kubernetes = {
roles = ["node"];
kubeconfig = {
server = "https://kubernetes:443";
caFile = ca_pem;
certFile = worker_cert;
keyFile = worker_key;
};
kubelet = {
tlsKeyFile = worker_key;
tlsCertFile = worker_cert;
};
};
};
in makeTest {
name = "kubernetes-cluster";
nodes = {
etcd1 = { config, pkgs, nodes, ... }: {
require = [etcdNodeConfig];
services.etcd = {
advertiseClientUrls = ["https://etcd1:2379"];
initialCluster = ["etcd1=https://etcd1:2380" "etcd2=https://etcd2:2380" "etcd3=https://etcd3:2380"];
initialAdvertisePeerUrls = ["https://etcd1:2380"];
};
};
etcd2 = { config, pkgs, ... }: {
require = [etcdNodeConfig];
services.etcd = {
advertiseClientUrls = ["https://etcd2:2379"];
initialCluster = ["etcd1=https://etcd1:2380" "etcd2=https://etcd2:2380" "etcd3=https://etcd3:2380"];
initialAdvertisePeerUrls = ["https://etcd2:2380"];
};
};
etcd3 = { config, pkgs, ... }: {
require = [etcdNodeConfig];
services.etcd = {
advertiseClientUrls = ["https://etcd3:2379"];
initialCluster = ["etcd1=https://etcd1:2380" "etcd2=https://etcd2:2380" "etcd3=https://etcd3:2380"];
initialAdvertisePeerUrls = ["https://etcd3:2380"];
};
};
kubeMaster1 = { config, pkgs, lib, nodes, ... }: {
require = [kubeMasterConfig];
};
kubeMaster2 = { config, pkgs, lib, nodes, ... }: {
require = [kubeMasterConfig];
};
# Kubernetes TCP load balancer
kubernetes = { config, pkgs, ... }: {
# kubernetes
networking.firewall.allowedTCPPorts = [ 443 ];
services.haproxy.enable = true;
services.haproxy.config = ''
global
log 127.0.0.1 local0 notice
user haproxy
group haproxy
defaults
log global
retries 2
timeout connect 3000
timeout server 5000
timeout client 5000
listen kubernetes
bind 0.0.0.0:443
mode tcp
option ssl-hello-chk
balance roundrobin
server kube-master-1 kubeMaster1:443 check
server kube-master-2 kubeMaster2:443 check
'';
};
kubeWorker1 = { config, pkgs, lib, nodes, ... }: {
require = [kubeWorkerConfig];
};
kubeWorker2 = { config, pkgs, lib, nodes, ... }: {
require = [kubeWorkerConfig];
};
};
testScript = ''
startAll;
${testSimplePod}
'';
};
}

36
pkgs/applications/networking/cluster/cni/default.nix Normal file
View File

@ -0,0 +1,36 @@
{ stdenv, fetchFromGitHub, go }:
stdenv.mkDerivation rec {
name = "cni-${version}";
version = "0.3.0";
src = fetchFromGitHub {
owner = "containernetworking";
repo = "cni";
rev = "v${version}";
sha256 = "1nvixvf5slnsdrfpfs2km64x680wf83jbyp7il12bcim37q2az7m";
};
buildInputs = [ go ];
outputs = ["out" "plugins"];
buildPhase = ''
patchShebangs build
./build
'';
installPhase = ''
mkdir -p $out/bin $plugins
mv bin/cnitool $out/bin
mv bin/* $plugins/
'';
meta = with stdenv.lib; {
description = "Container Network Interface - networking for Linux containers";
license = licenses.asl20;
homepage = https://github.com/containernetworking/cni;
maintainers = with maintainers; [offline];
platforms = [ "x86_64-linux" ];
};
}

3
pkgs/applications/networking/cluster/kubernetes/default.nix
View File

@ -48,9 +48,6 @@ stdenv.mkDerivation rec {
'';
preFixup = ''
wrapProgram "$out/bin/kube-proxy" --prefix PATH : "${iptables}/bin"
wrapProgram "$out/bin/kubelet" --prefix PATH : "${coreutils}/bin"
# Remove references to go compiler
while read file; do
cat $file | sed "s,${go},$(echo "${go}" | sed "s,$NIX_STORE/[^-]*,$NIX_STORE/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee,"),g" > $file.tmp

2
pkgs/top-level/all-packages.nix
View File

@ -12325,6 +12325,8 @@ in
pulseaudioSupport = config.pulseaudio or false;
};
cni = callPackage ../applications/networking/cluster/cni {};
communi = qt5.callPackage ../applications/networking/irc/communi { };
compiz = callPackage ../applications/window-managers/compiz {