mirror of
https://github.com/edgelesssys/constellation.git
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206 lines
6.0 KiB
Go
206 lines
6.0 KiB
Go
/*
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Copyright (c) Edgeless Systems GmbH
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SPDX-License-Identifier: AGPL-3.0-only
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*/
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package resources
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import (
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"crypto/x509"
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"crypto/x509/pkix"
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"github.com/edgelesssys/constellation/v2/bootstrapper/internal/certificate"
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"github.com/edgelesssys/constellation/v2/internal/kubernetes"
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"github.com/edgelesssys/constellation/v2/internal/versions"
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corev1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/util/intstr"
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"k8s.io/apiserver/pkg/apis/apiserver"
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)
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const (
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// KonnectivityCertificateFilename is the path to the kubelets certificate.
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KonnectivityCertificateFilename = "/etc/kubernetes/konnectivity.crt"
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// KonnectivityKeyFilename is the path to the kubelets private key.
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KonnectivityKeyFilename = "/etc/kubernetes/konnectivity.key"
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)
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// KonnectivityServerStaticPod deployment.
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type KonnectivityServerStaticPod struct {
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StaticPod corev1.Pod
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}
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// EgressSelectorConfiguration deployment.
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type EgressSelectorConfiguration struct {
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EgressSelectorConfiguration apiserver.EgressSelectorConfiguration
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}
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// NewKonnectivityServerStaticPod create a new KonnectivityServerStaticPod.
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func NewKonnectivityServerStaticPod() *KonnectivityServerStaticPod {
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udsHostPathType := corev1.HostPathDirectoryOrCreate
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return &KonnectivityServerStaticPod{
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StaticPod: corev1.Pod{
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TypeMeta: metav1.TypeMeta{
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APIVersion: "v1",
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Kind: "Pod",
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: "konnectivity-server",
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Namespace: "kube-system",
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},
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Spec: corev1.PodSpec{
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PriorityClassName: "system-cluster-critical",
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HostNetwork: true,
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Containers: []corev1.Container{
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{
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Name: "konnectivity-server-container",
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Image: versions.KonnectivityServerImage,
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Command: []string{"/proxy-server"},
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Args: []string{
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"--logtostderr=true",
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// This needs to be consistent with the value set in egressSelectorConfiguration.
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"--uds-name=/run/konnectivity-server/konnectivity-server.socket",
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// Clean up existing UDS file before starting the server in case the server crashed at some point.
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"--delete-existing-uds-file=true",
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// The following two lines assume the Konnectivity server is
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// deployed on the same machine as the apiserver, and the certs and
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// key of the API Server are at the specified location.
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"--cluster-cert=/etc/kubernetes/pki/apiserver.crt",
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"--cluster-key=/etc/kubernetes/pki/apiserver.key",
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// This needs to be consistent with the value set in egressSelectorConfiguration.
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"--mode=grpc",
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"--server-port=0",
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"--agent-port=8132",
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"--admin-port=8133",
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"--health-port=8134",
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"--v=5",
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"--agent-namespace=kube-system",
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"--agent-service-account=konnectivity-agent",
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"--kubeconfig=/etc/kubernetes/konnectivity-server.conf",
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"--authentication-audience=system:konnectivity-server",
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"--proxy-strategies=default",
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},
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LivenessProbe: &corev1.Probe{
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ProbeHandler: corev1.ProbeHandler{
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HTTPGet: &corev1.HTTPGetAction{
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Path: "/healthz",
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Port: intstr.FromInt(8134),
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},
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},
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InitialDelaySeconds: 30,
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TimeoutSeconds: 60,
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},
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Ports: []corev1.ContainerPort{
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{
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Name: "agent-port",
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ContainerPort: 8132,
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HostPort: 8132,
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},
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{
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Name: "admin-port",
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ContainerPort: 8133,
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HostPort: 8133,
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},
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{
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Name: "health-port",
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ContainerPort: 8134,
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HostPort: 8134,
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},
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},
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VolumeMounts: []corev1.VolumeMount{
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{
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Name: "k8s-certs",
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MountPath: "/etc/kubernetes/pki",
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ReadOnly: true,
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},
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{
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Name: "kubeconfig",
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MountPath: "/etc/kubernetes/konnectivity-server.conf",
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ReadOnly: true,
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},
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{
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Name: "konnectivity-uds",
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MountPath: "/run/konnectivity-server",
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ReadOnly: false,
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},
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},
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},
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},
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Volumes: []corev1.Volume{
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{
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Name: "k8s-certs",
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VolumeSource: corev1.VolumeSource{
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HostPath: &corev1.HostPathVolumeSource{
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Path: "/etc/kubernetes/pki",
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},
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},
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},
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{
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Name: "kubeconfig",
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VolumeSource: corev1.VolumeSource{
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HostPath: &corev1.HostPathVolumeSource{
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Path: "/etc/kubernetes/konnectivity-server.conf",
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},
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},
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},
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{
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Name: "konnectivity-uds",
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VolumeSource: corev1.VolumeSource{
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HostPath: &corev1.HostPathVolumeSource{
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Path: "/run/konnectivity-server",
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Type: &udsHostPathType,
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},
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},
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},
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},
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},
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},
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}
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}
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// NewEgressSelectorConfiguration creates a new EgressSelectorConfiguration.
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func NewEgressSelectorConfiguration() *EgressSelectorConfiguration {
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return &EgressSelectorConfiguration{
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EgressSelectorConfiguration: apiserver.EgressSelectorConfiguration{
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TypeMeta: metav1.TypeMeta{
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APIVersion: "apiserver.k8s.io/v1beta1",
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Kind: "EgressSelectorConfiguration",
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},
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EgressSelections: []apiserver.EgressSelection{
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{
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Name: "cluster",
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Connection: apiserver.Connection{
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ProxyProtocol: "GRPC",
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Transport: &apiserver.Transport{
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UDS: &apiserver.UDSTransport{
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UDSName: "/run/konnectivity-server/konnectivity-server.socket",
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},
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},
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},
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},
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},
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},
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}
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}
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// Marshal to Kubernetes YAML.
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func (v *KonnectivityServerStaticPod) Marshal() ([]byte, error) {
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return kubernetes.MarshalK8SResources(v)
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}
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// Marshal to Kubernetes YAML.
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func (v *EgressSelectorConfiguration) Marshal() ([]byte, error) {
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return kubernetes.MarshalK8SResources(v)
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}
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// GetKonnectivityCertificateRequest returns a certificate request and matching private key for the konnectivity server.
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func GetKonnectivityCertificateRequest() (certificateRequest []byte, privateKey []byte, err error) {
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csrTemplate := &x509.CertificateRequest{
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Subject: pkix.Name{
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CommonName: "system:konnectivity-server",
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},
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}
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return certificate.GetCertificateRequest(csrTemplate)
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}
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