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52ceced223
* Update image version * Introduce 'ValidK8sVersion' type. Ensures that consumers of the k8sVersion receive a valid version, without having to do their own validation. * Add testcase to check that kubeadm accepts the currently provided version.
302 lines
11 KiB
Go
302 lines
11 KiB
Go
package k8sapi
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import (
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"path/filepath"
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"github.com/edgelesssys/constellation/bootstrapper/internal/kubelet"
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"github.com/edgelesssys/constellation/bootstrapper/internal/kubernetes/k8sapi/resources"
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"github.com/edgelesssys/constellation/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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kubeletconf "k8s.io/kubelet/config/v1beta1"
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kubeadm "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/v1beta3"
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kubeconstants "k8s.io/kubernetes/cmd/kubeadm/app/constants"
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)
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// Uses types defined here: https://kubernetes.io/docs/reference/config-api/kubeadm-config.v1beta3/
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// Slimmed down to the fields we require
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const (
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bindPort = 6443
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auditLogDir = "/var/log/kubernetes/audit/"
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auditLogFile = "audit.log"
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auditPolicyPath = "/etc/kubernetes/audit-policy.yaml"
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)
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type CoreOSConfiguration struct{}
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func (c *CoreOSConfiguration) InitConfiguration(externalCloudProvider bool, k8sVersion versions.ValidK8sVersion) KubeadmInitYAML {
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var cloudProvider string
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if externalCloudProvider {
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cloudProvider = "external"
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}
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return KubeadmInitYAML{
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InitConfiguration: kubeadm.InitConfiguration{
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TypeMeta: metav1.TypeMeta{
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APIVersion: kubeadm.SchemeGroupVersion.String(),
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Kind: "InitConfiguration",
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},
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NodeRegistration: kubeadm.NodeRegistrationOptions{
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CRISocket: "/run/containerd/containerd.sock",
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KubeletExtraArgs: map[string]string{
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"cloud-provider": cloudProvider,
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"network-plugin": "cni",
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},
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},
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// AdvertiseAddress will be overwritten later
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LocalAPIEndpoint: kubeadm.APIEndpoint{
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BindPort: bindPort,
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},
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},
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// https://pkg.go.dev/k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/v1beta3#ClusterConfiguration
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ClusterConfiguration: kubeadm.ClusterConfiguration{
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TypeMeta: metav1.TypeMeta{
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Kind: "ClusterConfiguration",
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APIVersion: kubeadm.SchemeGroupVersion.String(),
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},
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// Target kubernetes version of the control plane.
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KubernetesVersion: versions.VersionConfigs[k8sVersion].PatchVersion,
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// necessary to be able to access the kubeapi server through localhost
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APIServer: kubeadm.APIServer{
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ControlPlaneComponent: kubeadm.ControlPlaneComponent{
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ExtraArgs: map[string]string{
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"audit-policy-file": auditPolicyPath,
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"audit-log-path": filepath.Join(auditLogDir, auditLogFile), // CIS benchmark
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"audit-log-maxage": "30", // CIS benchmark - Default value of Rancher
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"audit-log-maxbackup": "10", // CIS benchmark - Default value of Rancher
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"audit-log-maxsize": "100", // CIS benchmark - Default value of Rancher
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"profiling": "false", // CIS benchmark
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"kubelet-certificate-authority": filepath.Join(
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kubeconstants.KubernetesDir,
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kubeconstants.DefaultCertificateDir,
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kubeconstants.CACertName,
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),
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"tls-cipher-suites": "TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256," +
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"TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256," +
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"TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384," +
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"TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256," +
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"TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256," +
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"TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305," +
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"TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA," +
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"TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384", // CIS benchmark
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},
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ExtraVolumes: []kubeadm.HostPathMount{
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{
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Name: "audit-log",
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HostPath: auditLogDir,
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MountPath: auditLogDir,
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ReadOnly: false,
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PathType: corev1.HostPathDirectoryOrCreate,
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},
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{
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Name: "audit",
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HostPath: auditPolicyPath,
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MountPath: auditPolicyPath,
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ReadOnly: true,
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PathType: corev1.HostPathFile,
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},
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},
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},
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CertSANs: []string{"127.0.0.1"},
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},
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ControllerManager: kubeadm.ControlPlaneComponent{
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ExtraArgs: map[string]string{
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"flex-volume-plugin-dir": "/opt/libexec/kubernetes/kubelet-plugins/volume/exec/",
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"cloud-provider": cloudProvider,
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"configure-cloud-routes": "false",
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"profiling": "false", // CIS benchmark
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"terminated-pod-gc-threshold": "1000", // CIS benchmark - Default value of Rancher
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},
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},
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Scheduler: kubeadm.ControlPlaneComponent{
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ExtraArgs: map[string]string{
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"profiling": "false",
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},
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},
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},
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// warning: this config is applied to every node in the cluster!
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KubeletConfiguration: kubeletconf.KubeletConfiguration{
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ProtectKernelDefaults: true, // CIS benchmark
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TLSCipherSuites: []string{
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"TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256",
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"TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
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"TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305",
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"TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
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"TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305",
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"TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384",
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"TLS_RSA_WITH_AES_256_GCM_SHA384",
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"TLS_RSA_WITH_AES_128_GCM_SHA256",
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}, // CIS benchmark
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TypeMeta: metav1.TypeMeta{
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APIVersion: kubeletconf.SchemeGroupVersion.String(),
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Kind: "KubeletConfiguration",
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},
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RegisterWithTaints: []corev1.Taint{
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{
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Key: "node.cloudprovider.kubernetes.io/uninitialized",
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Value: "true",
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Effect: corev1.TaintEffectPreferNoSchedule,
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},
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{
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Key: "node.cilium.io/agent-not-ready",
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Value: "true",
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Effect: corev1.TaintEffectPreferNoSchedule,
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},
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},
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TLSCertFile: kubelet.CertificateFilename,
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TLSPrivateKeyFile: kubelet.KeyFilename,
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},
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}
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}
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func (c *CoreOSConfiguration) JoinConfiguration(externalCloudProvider bool) KubeadmJoinYAML {
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var cloudProvider string
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if externalCloudProvider {
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cloudProvider = "external"
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}
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return KubeadmJoinYAML{
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JoinConfiguration: kubeadm.JoinConfiguration{
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TypeMeta: metav1.TypeMeta{
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APIVersion: kubeadm.SchemeGroupVersion.String(),
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Kind: "JoinConfiguration",
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},
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NodeRegistration: kubeadm.NodeRegistrationOptions{
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CRISocket: "/run/containerd/containerd.sock",
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KubeletExtraArgs: map[string]string{
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"cloud-provider": cloudProvider,
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},
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},
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Discovery: kubeadm.Discovery{
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BootstrapToken: &kubeadm.BootstrapTokenDiscovery{},
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},
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},
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KubeletConfiguration: kubeletconf.KubeletConfiguration{
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TypeMeta: metav1.TypeMeta{
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APIVersion: kubeletconf.SchemeGroupVersion.String(),
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Kind: "KubeletConfiguration",
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},
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},
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}
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}
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type KubeadmJoinYAML struct {
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JoinConfiguration kubeadm.JoinConfiguration
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KubeletConfiguration kubeletconf.KubeletConfiguration
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}
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func (k *KubeadmJoinYAML) SetNodeName(nodeName string) {
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k.JoinConfiguration.NodeRegistration.Name = nodeName
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}
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func (k *KubeadmJoinYAML) SetAPIServerEndpoint(apiServerEndpoint string) {
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k.JoinConfiguration.Discovery.BootstrapToken.APIServerEndpoint = apiServerEndpoint
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}
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func (k *KubeadmJoinYAML) SetToken(token string) {
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k.JoinConfiguration.Discovery.BootstrapToken.Token = token
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}
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func (k *KubeadmJoinYAML) AppendDiscoveryTokenCaCertHash(discoveryTokenCaCertHash string) {
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k.JoinConfiguration.Discovery.BootstrapToken.CACertHashes = append(k.JoinConfiguration.Discovery.BootstrapToken.CACertHashes, discoveryTokenCaCertHash)
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}
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func (k *KubeadmJoinYAML) SetNodeIP(nodeIP string) {
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if k.JoinConfiguration.NodeRegistration.KubeletExtraArgs == nil {
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k.JoinConfiguration.NodeRegistration.KubeletExtraArgs = map[string]string{"node-ip": nodeIP}
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} else {
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k.JoinConfiguration.NodeRegistration.KubeletExtraArgs["node-ip"] = nodeIP
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}
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}
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func (k *KubeadmJoinYAML) SetProviderID(providerID string) {
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k.KubeletConfiguration.ProviderID = providerID
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}
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func (k *KubeadmJoinYAML) SetControlPlane(advertiseAddress string) {
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k.JoinConfiguration.ControlPlane = &kubeadm.JoinControlPlane{
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LocalAPIEndpoint: kubeadm.APIEndpoint{
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AdvertiseAddress: advertiseAddress,
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BindPort: 6443,
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},
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}
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k.JoinConfiguration.SkipPhases = []string{"control-plane-prepare/download-certs"}
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}
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func (k *KubeadmJoinYAML) Marshal() ([]byte, error) {
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return resources.MarshalK8SResources(k)
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}
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func (k *KubeadmJoinYAML) Unmarshal(yamlData []byte) (KubeadmJoinYAML, error) {
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var tmp KubeadmJoinYAML
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return tmp, resources.UnmarshalK8SResources(yamlData, &tmp)
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}
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type KubeadmInitYAML struct {
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InitConfiguration kubeadm.InitConfiguration
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ClusterConfiguration kubeadm.ClusterConfiguration
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KubeletConfiguration kubeletconf.KubeletConfiguration
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}
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func (k *KubeadmInitYAML) SetNodeName(nodeName string) {
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k.InitConfiguration.NodeRegistration.Name = nodeName
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}
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// SetCertSANs sets the SANs for the certificate.
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func (k *KubeadmInitYAML) SetCertSANs(certSANs []string) {
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for _, certSAN := range certSANs {
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if certSAN == "" {
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continue
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}
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k.ClusterConfiguration.APIServer.CertSANs = append(k.ClusterConfiguration.APIServer.CertSANs, certSAN)
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}
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}
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func (k *KubeadmInitYAML) SetAPIServerAdvertiseAddress(apiServerAdvertiseAddress string) {
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k.InitConfiguration.LocalAPIEndpoint.AdvertiseAddress = apiServerAdvertiseAddress
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}
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// SetControlPlaneEndpoint sets the control plane endpoint if controlPlaneEndpoint is not empty.
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func (k *KubeadmInitYAML) SetControlPlaneEndpoint(controlPlaneEndpoint string) {
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if controlPlaneEndpoint != "" {
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k.ClusterConfiguration.ControlPlaneEndpoint = controlPlaneEndpoint
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}
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}
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func (k *KubeadmInitYAML) SetServiceCIDR(serviceCIDR string) {
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k.ClusterConfiguration.Networking.ServiceSubnet = serviceCIDR
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}
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func (k *KubeadmInitYAML) SetPodNetworkCIDR(podNetworkCIDR string) {
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k.ClusterConfiguration.Networking.PodSubnet = podNetworkCIDR
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}
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func (k *KubeadmInitYAML) SetServiceDNSDomain(serviceDNSDomain string) {
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k.ClusterConfiguration.Networking.DNSDomain = serviceDNSDomain
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}
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func (k *KubeadmInitYAML) SetNodeIP(nodeIP string) {
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if k.InitConfiguration.NodeRegistration.KubeletExtraArgs == nil {
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k.InitConfiguration.NodeRegistration.KubeletExtraArgs = map[string]string{"node-ip": nodeIP}
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} else {
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k.InitConfiguration.NodeRegistration.KubeletExtraArgs["node-ip"] = nodeIP
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}
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}
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func (k *KubeadmInitYAML) SetProviderID(providerID string) {
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if k.InitConfiguration.NodeRegistration.KubeletExtraArgs == nil {
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k.InitConfiguration.NodeRegistration.KubeletExtraArgs = map[string]string{"provider-id": providerID}
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} else {
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k.InitConfiguration.NodeRegistration.KubeletExtraArgs["provider-id"] = providerID
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}
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}
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func (k *KubeadmInitYAML) Marshal() ([]byte, error) {
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return resources.MarshalK8SResources(k)
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}
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func (k *KubeadmInitYAML) Unmarshal(yamlData []byte) (KubeadmInitYAML, error) {
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var tmp KubeadmInitYAML
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return tmp, resources.UnmarshalK8SResources(yamlData, &tmp)
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}
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