diff --git a/metropolis/node/kubernetes/pki/kubernetes.go b/metropolis/node/kubernetes/pki/kubernetes.go
new file mode 100644
index 0000000..c4827a9
--- /dev/null
+++ b/metropolis/node/kubernetes/pki/kubernetes.go
@@ -0,0 +1,228 @@
+// Copyright 2020 The Monogon Project Authors.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package pki
+
+import (
+	"context"
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/pem"
+	"fmt"
+	"net"
+
+	"go.etcd.io/etcd/clientv3"
+	"k8s.io/client-go/tools/clientcmd"
+	configapi "k8s.io/client-go/tools/clientcmd/api"
+
+	common "git.monogon.dev/source/nexantic.git/metropolis/node"
+	"git.monogon.dev/source/nexantic.git/metropolis/node/core/logtree"
+)
+
+// KubeCertificateName is an enum-like unique name of a static Kubernetes certificate. The value of the name is used
+// as the unique part of an etcd path where the certificate and key are stored.
+type KubeCertificateName string
+
+const (
+	// The main Kubernetes CA, used to authenticate API consumers, and servers.
+	IdCA KubeCertificateName = "id-ca"
+
+	// Kubernetes apiserver server certificate.
+	APIServer KubeCertificateName = "apiserver"
+
+	// Kubelet client certificate, used to authenticate to the apiserver.
+	KubeletClient KubeCertificateName = "kubelet-client"
+
+	// Kubernetes Controller manager client certificate, used to authenticate to the apiserver.
+	ControllerManagerClient KubeCertificateName = "controller-manager-client"
+	// Kubernetes Controller manager server certificate, used to run its HTTP server.
+	ControllerManager KubeCertificateName = "controller-manager"
+
+	// Kubernetes Scheduler client certificate, used to authenticate to the apiserver.
+	SchedulerClient KubeCertificateName = "scheduler-client"
+	// Kubernetes scheduler server certificate, used to run its HTTP server.
+	Scheduler KubeCertificateName = "scheduler"
+
+	// Root-on-kube (system:masters) client certificate. Used to control the apiserver (and resources) by Smalltown
+	// internally.
+	Master KubeCertificateName = "master"
+
+	// OpenAPI Kubernetes Aggregation CA.
+	// See: https://kubernetes.io/docs/tasks/extend-kubernetes/configure-aggregation-layer/#ca-reusage-and-conflicts
+	AggregationCA    KubeCertificateName = "aggregation-ca"
+	FrontProxyClient KubeCertificateName = "front-proxy-client"
+)
+
+const (
+	// serviceAccountKeyName is the etcd path part that is used to store the ServiceAccount authentication secret.
+	// This is not a certificate, just an RSA key.
+	serviceAccountKeyName = "service-account-privkey"
+)
+
+// KubernetesPKI manages all PKI resources required to run Kubernetes on Smalltown. It contains all static certificates,
+// which can be retrieved, or be used to generate Kubeconfigs from.
+type KubernetesPKI struct {
+	logger       logtree.LeveledLogger
+	KV           clientv3.KV
+	Certificates map[KubeCertificateName]*Certificate
+}
+
+func NewKubernetes(l logtree.LeveledLogger, kv clientv3.KV) *KubernetesPKI {
+	pki := KubernetesPKI{
+		logger:       l,
+		KV:           kv,
+		Certificates: make(map[KubeCertificateName]*Certificate),
+	}
+
+	make := func(i, name KubeCertificateName, template x509.Certificate) {
+		pki.Certificates[name] = New(pki.Certificates[i], string(name), template)
+	}
+
+	pki.Certificates[IdCA] = New(SelfSigned, string(IdCA), CA("Smalltown Kubernetes ID CA"))
+	make(IdCA, APIServer, Server(
+		[]string{
+			"kubernetes",
+			"kubernetes.default",
+			"kubernetes.default.svc",
+			"kubernetes.default.svc.cluster",
+			"kubernetes.default.svc.cluster.local",
+			"localhost",
+		},
+		[]net.IP{{10, 0, 255, 1}, {127, 0, 0, 1}}, // TODO(q3k): add service network internal apiserver address
+	))
+	make(IdCA, KubeletClient, Client("smalltown:apiserver-kubelet-client", nil))
+	make(IdCA, ControllerManagerClient, Client("system:kube-controller-manager", nil))
+	make(IdCA, ControllerManager, Server([]string{"kube-controller-manager.local"}, nil))
+	make(IdCA, SchedulerClient, Client("system:kube-scheduler", nil))
+	make(IdCA, Scheduler, Server([]string{"kube-scheduler.local"}, nil))
+	make(IdCA, Master, Client("smalltown:master", []string{"system:masters"}))
+
+	pki.Certificates[AggregationCA] = New(SelfSigned, string(AggregationCA), CA("Smalltown OpenAPI Aggregation CA"))
+	make(AggregationCA, FrontProxyClient, Client("front-proxy-client", nil))
+
+	return &pki
+}
+
+// EnsureAll ensures that all static certificates (and the serviceaccount key) are present on etcd.
+func (k *KubernetesPKI) EnsureAll(ctx context.Context) error {
+	for n, v := range k.Certificates {
+		k.logger.Infof("Ensuring %s exists", string(n))
+		_, _, err := v.Ensure(ctx, k.KV)
+		if err != nil {
+			return fmt.Errorf("could not ensure certificate %q exists: %w", n, err)
+		}
+	}
+	_, err := k.ServiceAccountKey(ctx)
+	if err != nil {
+		return fmt.Errorf("could not ensure service account key exists: %w", err)
+	}
+	return nil
+}
+
+// Kubeconfig generates a kubeconfig blob for a given certificate name. The same lifetime semantics as in .Certificate
+// apply.
+func (k *KubernetesPKI) Kubeconfig(ctx context.Context, name KubeCertificateName) ([]byte, error) {
+	c, ok := k.Certificates[name]
+	if !ok {
+		return nil, fmt.Errorf("no certificate %q", name)
+	}
+	return c.Kubeconfig(ctx, k.KV)
+}
+
+// Certificate retrieves an x509 DER-encoded (but not PEM-wrapped) key and certificate for a given certificate name.
+// If the requested certificate is volatile, it will be created on demand. Otherwise it will be created on etcd (if not
+// present), and retrieved from there.
+func (k *KubernetesPKI) Certificate(ctx context.Context, name KubeCertificateName) (cert, key []byte, err error) {
+	c, ok := k.Certificates[name]
+	if !ok {
+		return nil, nil, fmt.Errorf("no certificate %q", name)
+	}
+	return c.Ensure(ctx, k.KV)
+}
+
+// Kubeconfig generates a kubeconfig blob for this certificate. The same lifetime semantics as in .Ensure apply.
+func (c *Certificate) Kubeconfig(ctx context.Context, kv clientv3.KV) ([]byte, error) {
+
+	cert, key, err := c.Ensure(ctx, kv)
+	if err != nil {
+		return nil, fmt.Errorf("could not ensure certificate exists: %w", err)
+	}
+
+	kubeconfig := configapi.NewConfig()
+
+	cluster := configapi.NewCluster()
+	cluster.Server = fmt.Sprintf("https://127.0.0.1:%v", common.KubernetesAPIPort)
+
+	ca, err := c.issuer.CACertificate(ctx, kv)
+	if err != nil {
+		return nil, fmt.Errorf("could not get CA certificate: %w", err)
+	}
+	if ca != nil {
+		cluster.CertificateAuthorityData = pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: ca})
+	}
+	kubeconfig.Clusters["default"] = cluster
+
+	authInfo := configapi.NewAuthInfo()
+	authInfo.ClientCertificateData = pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: cert})
+	authInfo.ClientKeyData = pem.EncodeToMemory(&pem.Block{Type: "PRIVATE KEY", Bytes: key})
+	kubeconfig.AuthInfos["default"] = authInfo
+
+	ct := configapi.NewContext()
+	ct.Cluster = "default"
+	ct.AuthInfo = "default"
+	kubeconfig.Contexts["default"] = ct
+
+	kubeconfig.CurrentContext = "default"
+	return clientcmd.Write(*kubeconfig)
+}
+
+// ServiceAccountKey retrieves (and possible generates and stores on etcd) the Kubernetes service account key. The
+// returned data is ready to be used by Kubernetes components (in PKIX form).
+func (k *KubernetesPKI) ServiceAccountKey(ctx context.Context) ([]byte, error) {
+	// TODO(q3k): this should be abstracted away once we abstract away etcd access into a library with try-or-create
+	// semantics.
+
+	path := etcdPath("%s.der", serviceAccountKeyName)
+
+	// Try loading  key from etcd.
+	keyRes, err := k.KV.Get(ctx, path)
+	if err != nil {
+		return nil, fmt.Errorf("failed to get key from etcd: %w", err)
+	}
+
+	if len(keyRes.Kvs) == 1 {
+		// Certificate and key exists in etcd, return that.
+		return keyRes.Kvs[0].Value, nil
+	}
+
+	// No key found - generate one.
+	keyRaw, err := rsa.GenerateKey(rand.Reader, 2048)
+	if err != nil {
+		panic(err)
+	}
+	key, err := x509.MarshalPKCS8PrivateKey(keyRaw)
+	if err != nil {
+		panic(err) // Always a programmer error
+	}
+
+	// Save to etcd.
+	_, err = k.KV.Put(ctx, path, string(key))
+	if err != nil {
+		err = fmt.Errorf("failed to write newly generated key: %w", err)
+	}
+	return key, nil
+}