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deployment.go
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deployment.go
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// Copyright 2022 Clastix Labs
// SPDX-License-Identifier: Apache-2.0
package controlplane
import (
"context"
"crypto/md5"
"fmt"
"path"
"sort"
"strconv"
"strings"
"github.com/pkg/errors"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/intstr"
"k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/v1beta3"
"k8s.io/kubernetes/cmd/kubeadm/app/constants"
pointer "k8s.io/utils/ptr"
"sigs.k8s.io/controller-runtime/pkg/client"
kamajiv1alpha1 "github.com/clastix/kamaji/api/v1alpha1"
"github.com/clastix/kamaji/internal/utilities"
)
// Volume names.
const (
kubernetesPKIVolumeName = "etc-kubernetes-pki"
caCertificatesVolumeName = "etc-ca-certificates"
sslCertsVolumeName = "etc-ssl-certs"
usrShareCACertificatesVolumeName = "usr-share-ca-certificates"
usrLocalShareCaCertificateVolumeName = "usr-local-share-ca-certificates"
schedulerKubeconfigVolumeName = "scheduler-kubeconfig"
controllerManagerKubeconfigVolumeName = "controller-manager-kubeconfig"
dataStoreCertsVolumeName = "kine-config"
kineVolumeCertName = "kine-certs"
)
const (
apiServerFlagsAnnotation = "kube-apiserver.kamaji.clastix.io/args"
// Kamaji container names.
apiServerContainerName = "kube-apiserver"
controlPlaneContainerName = "kube-controller-manager"
schedulerContainerName = "kube-scheduler"
kineContainerName = "kine"
kineInitContainerName = "chmod"
)
type Deployment struct {
KineContainerImage string
DataStore kamajiv1alpha1.DataStore
Client client.Client
}
func (d Deployment) Build(ctx context.Context, deployment *appsv1.Deployment, tenantControlPlane kamajiv1alpha1.TenantControlPlane) {
address, _, _ := tenantControlPlane.AssignedControlPlaneAddress()
d.setLabels(deployment, utilities.MergeMaps(utilities.KamajiLabels(tenantControlPlane.GetName(), "deployment"), tenantControlPlane.Spec.ControlPlane.Deployment.AdditionalMetadata.Labels))
d.setAnnotations(deployment, utilities.MergeMaps(deployment.Annotations, tenantControlPlane.Spec.ControlPlane.Deployment.AdditionalMetadata.Annotations))
d.setTemplateLabels(&deployment.Spec.Template, d.templateLabels(ctx, &tenantControlPlane))
d.setNodeSelector(&deployment.Spec.Template.Spec, tenantControlPlane)
d.setToleration(&deployment.Spec.Template.Spec, tenantControlPlane)
d.setAffinity(&deployment.Spec.Template.Spec, tenantControlPlane)
d.setStrategy(&deployment.Spec, tenantControlPlane)
d.setSelector(&deployment.Spec, tenantControlPlane)
d.setTopologySpreadConstraints(&deployment.Spec, tenantControlPlane.Spec.ControlPlane.Deployment.TopologySpreadConstraints)
d.setRuntimeClass(&deployment.Spec.Template.Spec, tenantControlPlane)
d.setReplicas(&deployment.Spec, tenantControlPlane)
d.resetKubeAPIServerFlags(deployment, tenantControlPlane)
d.setInitContainers(&deployment.Spec.Template.Spec, tenantControlPlane)
d.setAdditionalContainers(&deployment.Spec.Template.Spec, tenantControlPlane)
d.setContainers(&deployment.Spec.Template.Spec, tenantControlPlane, address)
d.setAdditionalVolumes(&deployment.Spec.Template.Spec, tenantControlPlane)
d.setVolumes(&deployment.Spec.Template.Spec, tenantControlPlane)
d.Client.Scheme().Default(deployment)
}
func (d Deployment) setContainers(podSpec *corev1.PodSpec, tcp kamajiv1alpha1.TenantControlPlane, address string) {
d.buildKubeAPIServer(podSpec, tcp, address)
d.buildScheduler(podSpec, tcp)
d.buildControllerManager(podSpec, tcp)
d.buildKine(podSpec, tcp)
}
// setInitContainers allows adding extra init containers from the user-space:
// this function must be called priorit the setContainers to ensure the idempotency of podSpec building.
func (d Deployment) setInitContainers(podSpec *corev1.PodSpec, tcp kamajiv1alpha1.TenantControlPlane) {
initContainers := tcp.Spec.ControlPlane.Deployment.AdditionalInitContainers
if d.DataStore.Spec.Driver == kamajiv1alpha1.EtcdDriver {
podSpec.InitContainers = initContainers
}
found, index := utilities.HasNamedContainer(podSpec.InitContainers, kineInitContainerName)
if found {
initContainers = append(initContainers, podSpec.InitContainers[index:]...)
}
podSpec.InitContainers = initContainers
}
// setAdditionalContainers must be called before setContainers: the user-space ones are going to be prepended
// to simplify the management of the Kamaji ones during the create or update action.
func (d Deployment) setAdditionalContainers(podSpec *corev1.PodSpec, tcp kamajiv1alpha1.TenantControlPlane) {
containers := tcp.Spec.ControlPlane.Deployment.AdditionalContainers
found, index := utilities.HasNamedContainer(podSpec.Containers, apiServerContainerName)
if found {
containers = append(containers, podSpec.Containers[index:]...)
}
podSpec.Containers = containers
}
func (d Deployment) setStrategy(deployment *appsv1.DeploymentSpec, tcp kamajiv1alpha1.TenantControlPlane) {
deployment.Strategy = appsv1.DeploymentStrategy{
Type: tcp.Spec.ControlPlane.Deployment.Strategy.Type,
}
// If it's recreate strategy, we don't need any RollingUpdate params
if tcp.Spec.ControlPlane.Deployment.Strategy.Type == appsv1.RecreateDeploymentStrategyType {
tcp.Spec.ControlPlane.Deployment.Strategy.RollingUpdate = nil
return
}
// In case of no RollingUpdate options, Kamaji will perform a blue/green rollout:
// this will ensure to avoid round-robin between old and new version,
// useful especially during the Kubernetes version upgrade phase.
if tcp.Spec.ControlPlane.Deployment.Strategy.RollingUpdate == nil {
maxSurge := intstr.FromString("100%")
maxUnavailable := intstr.FromInt(0)
deployment.Strategy.RollingUpdate = &appsv1.RollingUpdateDeployment{
MaxUnavailable: &maxUnavailable,
MaxSurge: &maxSurge,
}
return
}
deployment.Strategy.RollingUpdate = &appsv1.RollingUpdateDeployment{}
if tcp.Spec.ControlPlane.Deployment.Strategy.RollingUpdate.MaxUnavailable != nil {
deployment.Strategy.RollingUpdate.MaxUnavailable = tcp.Spec.ControlPlane.Deployment.Strategy.RollingUpdate.MaxUnavailable
}
if tcp.Spec.ControlPlane.Deployment.Strategy.RollingUpdate.MaxSurge != nil {
deployment.Strategy.RollingUpdate.MaxSurge = tcp.Spec.ControlPlane.Deployment.Strategy.RollingUpdate.MaxSurge
}
}
func (d Deployment) setVolumes(podSpec *corev1.PodSpec, tcp kamajiv1alpha1.TenantControlPlane) {
for _, fn := range []func(*corev1.PodSpec, kamajiv1alpha1.TenantControlPlane){
d.buildPKIVolume,
d.buildCAVolume,
d.buildSSLCertsVolume,
d.buildShareCAVolume,
d.buildLocalShareCAVolume,
d.buildSchedulerVolume,
d.buildControllerManagerVolume,
d.buildKineVolume,
} {
fn(podSpec, tcp)
}
}
func (d Deployment) buildPKIVolume(podSpec *corev1.PodSpec, tcp kamajiv1alpha1.TenantControlPlane) {
found, index := utilities.HasNamedVolume(podSpec.Volumes, kubernetesPKIVolumeName)
if !found {
index = len(podSpec.Volumes)
podSpec.Volumes = append(podSpec.Volumes, corev1.Volume{})
}
sources := []corev1.VolumeProjection{
{
Secret: d.secretProjection(tcp.Status.Certificates.APIServer.SecretName, constants.APIServerCertName, constants.APIServerKeyName),
},
{
Secret: d.secretProjection(tcp.Status.Certificates.CA.SecretName, constants.CACertName, constants.CAKeyName),
},
{
Secret: d.secretProjection(tcp.Status.Certificates.APIServerKubeletClient.SecretName, constants.APIServerKubeletClientCertName, constants.APIServerKubeletClientKeyName),
},
{
Secret: d.secretProjection(tcp.Status.Certificates.FrontProxyCA.SecretName, constants.FrontProxyCACertName, constants.FrontProxyCAKeyName),
},
{
Secret: d.secretProjection(tcp.Status.Certificates.FrontProxyClient.SecretName, constants.FrontProxyClientCertName, constants.FrontProxyClientKeyName),
},
{
Secret: d.secretProjection(tcp.Status.Certificates.SA.SecretName, constants.ServiceAccountPublicKeyName, constants.ServiceAccountPrivateKeyName),
},
}
if d.DataStore.Spec.Driver == kamajiv1alpha1.EtcdDriver {
sources = append(sources, corev1.VolumeProjection{
Secret: &corev1.SecretProjection{
LocalObjectReference: corev1.LocalObjectReference{
Name: tcp.Status.Storage.Certificate.SecretName,
},
Items: []corev1.KeyToPath{
{
Key: "ca.crt",
Path: "etcd/ca.crt",
},
{
Key: "server.crt",
Path: "etcd/server.crt",
},
{
Key: "server.key",
Path: "etcd/server.key",
},
},
},
})
}
podSpec.Volumes[index].Name = kubernetesPKIVolumeName
podSpec.Volumes[index].VolumeSource = corev1.VolumeSource{
Projected: &corev1.ProjectedVolumeSource{
Sources: sources,
DefaultMode: pointer.To(int32(420)),
},
}
}
func (d Deployment) buildCAVolume(podSpec *corev1.PodSpec, tcp kamajiv1alpha1.TenantControlPlane) {
found, index := utilities.HasNamedVolume(podSpec.Volumes, caCertificatesVolumeName)
if !found {
index = len(podSpec.Volumes)
podSpec.Volumes = append(podSpec.Volumes, corev1.Volume{})
}
podSpec.Volumes[index].Name = caCertificatesVolumeName
podSpec.Volumes[index].VolumeSource = corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: tcp.Status.Certificates.CA.SecretName,
DefaultMode: pointer.To(int32(420)),
},
}
}
func (d Deployment) buildSSLCertsVolume(podSpec *corev1.PodSpec, tcp kamajiv1alpha1.TenantControlPlane) {
found, index := utilities.HasNamedVolume(podSpec.Volumes, sslCertsVolumeName)
if !found {
index = len(podSpec.Volumes)
podSpec.Volumes = append(podSpec.Volumes, corev1.Volume{})
}
podSpec.Volumes[index].Name = sslCertsVolumeName
podSpec.Volumes[index].VolumeSource = corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: tcp.Status.Certificates.CA.SecretName,
DefaultMode: pointer.To(int32(420)),
},
}
}
func (d Deployment) buildShareCAVolume(podSpec *corev1.PodSpec, tcp kamajiv1alpha1.TenantControlPlane) {
found, index := utilities.HasNamedVolume(podSpec.Volumes, usrShareCACertificatesVolumeName)
if !found {
index = len(podSpec.Volumes)
podSpec.Volumes = append(podSpec.Volumes, corev1.Volume{})
}
podSpec.Volumes[index].Name = usrShareCACertificatesVolumeName
podSpec.Volumes[index].VolumeSource = corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: tcp.Status.Certificates.CA.SecretName,
DefaultMode: pointer.To(int32(420)),
},
}
}
func (d Deployment) buildLocalShareCAVolume(podSpec *corev1.PodSpec, tcp kamajiv1alpha1.TenantControlPlane) {
found, index := utilities.HasNamedVolume(podSpec.Volumes, usrLocalShareCaCertificateVolumeName)
if !found {
index = len(podSpec.Volumes)
podSpec.Volumes = append(podSpec.Volumes, corev1.Volume{})
}
podSpec.Volumes[index].Name = usrLocalShareCaCertificateVolumeName
podSpec.Volumes[index].VolumeSource = corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: tcp.Status.Certificates.CA.SecretName,
DefaultMode: pointer.To(int32(420)),
},
}
}
func (d Deployment) buildSchedulerVolume(podSpec *corev1.PodSpec, tcp kamajiv1alpha1.TenantControlPlane) {
found, index := utilities.HasNamedVolume(podSpec.Volumes, schedulerKubeconfigVolumeName)
if !found {
index = len(podSpec.Volumes)
podSpec.Volumes = append(podSpec.Volumes, corev1.Volume{})
}
podSpec.Volumes[index].Name = schedulerKubeconfigVolumeName
podSpec.Volumes[index].VolumeSource = corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: tcp.Status.KubeConfig.Scheduler.SecretName,
DefaultMode: pointer.To(int32(420)),
},
}
}
func (d Deployment) buildControllerManagerVolume(podSpec *corev1.PodSpec, tcp kamajiv1alpha1.TenantControlPlane) {
found, index := utilities.HasNamedVolume(podSpec.Volumes, controllerManagerKubeconfigVolumeName)
if !found {
index = len(podSpec.Volumes)
podSpec.Volumes = append(podSpec.Volumes, corev1.Volume{})
}
podSpec.Volumes[index].Name = controllerManagerKubeconfigVolumeName
podSpec.Volumes[index].VolumeSource = corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: tcp.Status.KubeConfig.ControllerManager.SecretName,
DefaultMode: pointer.To(int32(420)),
},
}
}
// setAdditionalVolumes must be called before setVolumes: the user-space ones are going to be prepended
// to simplify the management of the Kamaji ones during the create or update action.
func (d Deployment) setAdditionalVolumes(podSpec *corev1.PodSpec, tcp kamajiv1alpha1.TenantControlPlane) {
volumes := tcp.Spec.ControlPlane.Deployment.AdditionalVolumes
found, index := utilities.HasNamedVolume(podSpec.Volumes, kubernetesPKIVolumeName)
if found {
volumes = append(volumes, podSpec.Volumes[index:]...)
}
podSpec.Volumes = volumes
}
func (d Deployment) buildScheduler(podSpec *corev1.PodSpec, tenantControlPlane kamajiv1alpha1.TenantControlPlane) {
found, index := utilities.HasNamedContainer(podSpec.Containers, schedulerContainerName)
if !found {
index = len(podSpec.Containers)
podSpec.Containers = append(podSpec.Containers, corev1.Container{})
}
args := map[string]string{}
if tenantControlPlane.Spec.ControlPlane.Deployment.ExtraArgs != nil {
args = utilities.ArgsFromSliceToMap(tenantControlPlane.Spec.ControlPlane.Deployment.ExtraArgs.Scheduler)
}
kubeconfig := "/etc/kubernetes/scheduler.conf"
args["--authentication-kubeconfig"] = kubeconfig
args["--authorization-kubeconfig"] = kubeconfig
args["--bind-address"] = "0.0.0.0"
args["--kubeconfig"] = kubeconfig
args["--leader-elect"] = "true" //nolint:goconst
podSpec.Containers[index].Name = schedulerContainerName
podSpec.Containers[index].Image = tenantControlPlane.Spec.ControlPlane.Deployment.RegistrySettings.KubeSchedulerImage(tenantControlPlane.Spec.Kubernetes.Version)
podSpec.Containers[index].Command = []string{"kube-scheduler"}
podSpec.Containers[index].Args = utilities.ArgsFromMapToSlice(args)
podSpec.Containers[index].LivenessProbe = &corev1.Probe{
ProbeHandler: corev1.ProbeHandler{
HTTPGet: &corev1.HTTPGetAction{
Path: "/healthz",
Port: intstr.FromInt(10259),
Scheme: corev1.URISchemeHTTPS,
},
},
InitialDelaySeconds: 0,
TimeoutSeconds: 1,
PeriodSeconds: 10,
SuccessThreshold: 1,
FailureThreshold: 3,
}
podSpec.Containers[index].StartupProbe = &corev1.Probe{
ProbeHandler: corev1.ProbeHandler{
HTTPGet: &corev1.HTTPGetAction{
Path: "/healthz",
Port: intstr.FromInt(10259),
Scheme: corev1.URISchemeHTTPS,
},
},
InitialDelaySeconds: 0,
TimeoutSeconds: 1,
PeriodSeconds: 10,
SuccessThreshold: 1,
FailureThreshold: 3,
}
switch {
case tenantControlPlane.Spec.ControlPlane.Deployment.Resources == nil:
podSpec.Containers[index].Resources = corev1.ResourceRequirements{}
case tenantControlPlane.Spec.ControlPlane.Deployment.Resources.Scheduler != nil:
podSpec.Containers[index].Resources = *tenantControlPlane.Spec.ControlPlane.Deployment.Resources.Scheduler
default:
podSpec.Containers[index].Resources = corev1.ResourceRequirements{}
}
// Volume mounts
var extraVolumeMounts []corev1.VolumeMount
if additionalVolumeMounts := tenantControlPlane.Spec.ControlPlane.Deployment.AdditionalVolumeMounts; additionalVolumeMounts != nil {
extraVolumeMounts = append(extraVolumeMounts, additionalVolumeMounts.Scheduler...)
}
volumeMounts := d.initVolumeMounts(schedulerKubeconfigVolumeName, podSpec.Containers[index].VolumeMounts, extraVolumeMounts...)
d.ensureVolumeMount(&volumeMounts, corev1.VolumeMount{
Name: schedulerKubeconfigVolumeName,
ReadOnly: true,
MountPath: "/etc/kubernetes",
})
podSpec.Containers[index].VolumeMounts = volumeMounts
}
func (d Deployment) buildControllerManager(podSpec *corev1.PodSpec, tenantControlPlane kamajiv1alpha1.TenantControlPlane) {
found, index := utilities.HasNamedContainer(podSpec.Containers, controlPlaneContainerName)
if !found {
index = len(podSpec.Containers)
podSpec.Containers = append(podSpec.Containers, corev1.Container{})
}
// Configuring the arguments of the container,
// taking in consideration the extra args from the user-space.
args := map[string]string{}
if tenantControlPlane.Spec.ControlPlane.Deployment.ExtraArgs != nil {
args = utilities.ArgsFromSliceToMap(tenantControlPlane.Spec.ControlPlane.Deployment.ExtraArgs.ControllerManager)
}
kubeconfig := "/etc/kubernetes/controller-manager.conf"
args["--allocate-node-cidrs"] = "true"
args["--authentication-kubeconfig"] = kubeconfig
args["--authorization-kubeconfig"] = kubeconfig
args["--bind-address"] = "0.0.0.0"
args["--client-ca-file"] = path.Join(v1beta3.DefaultCertificatesDir, constants.CACertName)
args["--cluster-name"] = tenantControlPlane.GetName()
args["--cluster-signing-cert-file"] = path.Join(v1beta3.DefaultCertificatesDir, constants.CACertName)
args["--cluster-signing-key-file"] = path.Join(v1beta3.DefaultCertificatesDir, constants.CAKeyName)
args["--controllers"] = "*,bootstrapsigner,tokencleaner"
args["--kubeconfig"] = kubeconfig
args["--leader-elect"] = "true"
args["--service-cluster-ip-range"] = tenantControlPlane.Spec.NetworkProfile.ServiceCIDR
args["--cluster-cidr"] = tenantControlPlane.Spec.NetworkProfile.PodCIDR
args["--requestheader-client-ca-file"] = path.Join(v1beta3.DefaultCertificatesDir, constants.FrontProxyCACertName)
args["--root-ca-file"] = path.Join(v1beta3.DefaultCertificatesDir, constants.CACertName)
args["--service-account-private-key-file"] = path.Join(v1beta3.DefaultCertificatesDir, constants.ServiceAccountPrivateKeyName)
args["--use-service-account-credentials"] = "true"
podSpec.Containers[index].Name = "kube-controller-manager"
podSpec.Containers[index].Image = tenantControlPlane.Spec.ControlPlane.Deployment.RegistrySettings.KubeControllerManagerImage(tenantControlPlane.Spec.Kubernetes.Version)
podSpec.Containers[index].Command = []string{"kube-controller-manager"}
podSpec.Containers[index].Args = utilities.ArgsFromMapToSlice(args)
podSpec.Containers[index].LivenessProbe = &corev1.Probe{
ProbeHandler: corev1.ProbeHandler{
HTTPGet: &corev1.HTTPGetAction{
Path: "/healthz",
Port: intstr.FromInt(10257),
Scheme: corev1.URISchemeHTTPS,
},
},
InitialDelaySeconds: 0,
TimeoutSeconds: 1,
PeriodSeconds: 10,
SuccessThreshold: 1,
FailureThreshold: 3,
}
podSpec.Containers[index].StartupProbe = &corev1.Probe{
ProbeHandler: corev1.ProbeHandler{
HTTPGet: &corev1.HTTPGetAction{
Path: "/healthz",
Port: intstr.FromInt(10257),
Scheme: corev1.URISchemeHTTPS,
},
},
InitialDelaySeconds: 0,
TimeoutSeconds: 1,
PeriodSeconds: 10,
SuccessThreshold: 1,
FailureThreshold: 3,
}
switch {
case tenantControlPlane.Spec.ControlPlane.Deployment.Resources == nil:
podSpec.Containers[index].Resources = corev1.ResourceRequirements{}
case tenantControlPlane.Spec.ControlPlane.Deployment.Resources.ControllerManager != nil:
podSpec.Containers[index].Resources = *tenantControlPlane.Spec.ControlPlane.Deployment.Resources.ControllerManager
default:
podSpec.Containers[index].Resources = corev1.ResourceRequirements{}
}
// Volume mounts
var extraVolumeMounts []corev1.VolumeMount
if additionalVolumeMounts := tenantControlPlane.Spec.ControlPlane.Deployment.AdditionalVolumeMounts; additionalVolumeMounts != nil {
extraVolumeMounts = append(extraVolumeMounts, additionalVolumeMounts.ControllerManager...)
}
volumeMounts := d.initVolumeMounts(controllerManagerKubeconfigVolumeName, podSpec.Containers[index].VolumeMounts, extraVolumeMounts...)
d.ensureVolumeMount(&volumeMounts, corev1.VolumeMount{
Name: controllerManagerKubeconfigVolumeName,
ReadOnly: true,
MountPath: "/etc/kubernetes",
})
d.ensureVolumeMount(&volumeMounts, corev1.VolumeMount{
Name: kubernetesPKIVolumeName,
ReadOnly: true,
MountPath: v1beta3.DefaultCertificatesDir,
})
d.ensureVolumeMount(&volumeMounts, corev1.VolumeMount{
Name: caCertificatesVolumeName,
ReadOnly: true,
MountPath: "/etc/ca-certificates",
})
d.ensureVolumeMount(&volumeMounts, corev1.VolumeMount{
Name: sslCertsVolumeName,
ReadOnly: true,
MountPath: "/etc/ssl/certs",
})
d.ensureVolumeMount(&volumeMounts, corev1.VolumeMount{
Name: usrShareCACertificatesVolumeName,
ReadOnly: true,
MountPath: "/usr/share/ca-certificates",
})
d.ensureVolumeMount(&volumeMounts, corev1.VolumeMount{
Name: usrLocalShareCaCertificateVolumeName,
ReadOnly: true,
MountPath: "/usr/local/share/ca-certificates",
})
podSpec.Containers[index].VolumeMounts = volumeMounts
}
// ensureVolumeMount retrieve the index for the named volumeMount, in case of missing it's going to be appended.
func (d Deployment) ensureVolumeMount(in *[]corev1.VolumeMount, desired corev1.VolumeMount) {
list := *in
found, index := utilities.HasNamedVolumeMount(*in, desired.Name)
if !found {
index = len(list)
list = append(list, corev1.VolumeMount{})
}
list[index] = desired
*in = list
}
// initVolumeMounts is responsible to create the idempotent slice of corev1.VolumeMount:
// firstSystemVolumeMountName must refer to the first Kamaji-space volume mount to detect properly user-space ones.
func (d Deployment) initVolumeMounts(firstSystemVolumeMountName string, actual []corev1.VolumeMount, extra ...corev1.VolumeMount) []corev1.VolumeMount {
var volumeMounts []corev1.VolumeMount
volumeMounts = append(volumeMounts, extra...)
// Retrieve the first safe volume mount to pick up from:
// this is required to be sure to delete all the extra containers from the user space.
if vmFound, vmIndex := utilities.HasNamedVolumeMount(actual, firstSystemVolumeMountName); vmFound {
volumeMounts = append(volumeMounts, actual[vmIndex:]...)
}
return volumeMounts
}
func (d Deployment) buildKubeAPIServer(podSpec *corev1.PodSpec, tenantControlPlane kamajiv1alpha1.TenantControlPlane, address string) {
found, index := utilities.HasNamedContainer(podSpec.Containers, apiServerContainerName)
if !found {
index = len(podSpec.Containers)
podSpec.Containers = append(podSpec.Containers, corev1.Container{})
}
args := d.buildKubeAPIServerCommand(tenantControlPlane, address, utilities.ArgsFromSliceToMap(podSpec.Containers[index].Args))
podSpec.Containers[index].Name = apiServerContainerName
podSpec.Containers[index].Args = utilities.ArgsFromMapToSlice(args)
podSpec.Containers[index].Image = tenantControlPlane.Spec.ControlPlane.Deployment.RegistrySettings.KubeAPIServerImage(tenantControlPlane.Spec.Kubernetes.Version)
podSpec.Containers[index].Command = []string{"kube-apiserver"}
podSpec.Containers[index].LivenessProbe = &corev1.Probe{
ProbeHandler: corev1.ProbeHandler{
HTTPGet: &corev1.HTTPGetAction{
Path: "/livez",
Port: intstr.FromInt(int(tenantControlPlane.Spec.NetworkProfile.Port)),
Scheme: corev1.URISchemeHTTPS,
},
},
InitialDelaySeconds: 0,
TimeoutSeconds: 1,
PeriodSeconds: 10,
SuccessThreshold: 1,
FailureThreshold: 3,
}
podSpec.Containers[index].ReadinessProbe = &corev1.Probe{
ProbeHandler: corev1.ProbeHandler{
HTTPGet: &corev1.HTTPGetAction{
Path: "/readyz",
Port: intstr.FromInt(int(tenantControlPlane.Spec.NetworkProfile.Port)),
Scheme: corev1.URISchemeHTTPS,
},
},
InitialDelaySeconds: 0,
TimeoutSeconds: 1,
PeriodSeconds: 10,
SuccessThreshold: 1,
FailureThreshold: 3,
}
podSpec.Containers[index].StartupProbe = &corev1.Probe{
ProbeHandler: corev1.ProbeHandler{
HTTPGet: &corev1.HTTPGetAction{
Path: "/livez",
Port: intstr.FromInt(int(tenantControlPlane.Spec.NetworkProfile.Port)),
Scheme: corev1.URISchemeHTTPS,
},
},
InitialDelaySeconds: 0,
TimeoutSeconds: 1,
PeriodSeconds: 10,
SuccessThreshold: 1,
FailureThreshold: 3,
}
podSpec.Containers[index].ImagePullPolicy = corev1.PullAlways
// Volume mounts
var extraVolumeMounts []corev1.VolumeMount
if additionalVolumeMounts := tenantControlPlane.Spec.ControlPlane.Deployment.AdditionalVolumeMounts; additionalVolumeMounts != nil {
extraVolumeMounts = append(extraVolumeMounts, additionalVolumeMounts.APIServer...)
}
volumeMounts := d.initVolumeMounts(kubernetesPKIVolumeName, podSpec.Containers[index].VolumeMounts, extraVolumeMounts...)
d.ensureVolumeMount(&volumeMounts, corev1.VolumeMount{
Name: kubernetesPKIVolumeName,
ReadOnly: true,
MountPath: v1beta3.DefaultCertificatesDir,
})
d.ensureVolumeMount(&volumeMounts, corev1.VolumeMount{
Name: caCertificatesVolumeName,
ReadOnly: true,
MountPath: "/etc/ca-certificates",
})
d.ensureVolumeMount(&volumeMounts, corev1.VolumeMount{
Name: sslCertsVolumeName,
ReadOnly: true,
MountPath: "/etc/ssl/certs",
})
d.ensureVolumeMount(&volumeMounts, corev1.VolumeMount{
Name: usrShareCACertificatesVolumeName,
ReadOnly: true,
MountPath: "/usr/share/ca-certificates",
})
d.ensureVolumeMount(&volumeMounts, corev1.VolumeMount{
Name: usrLocalShareCaCertificateVolumeName,
ReadOnly: true,
MountPath: "/usr/local/share/ca-certificates",
})
podSpec.Containers[index].VolumeMounts = volumeMounts
switch {
case tenantControlPlane.Spec.ControlPlane.Deployment.Resources == nil:
podSpec.Containers[index].Resources = corev1.ResourceRequirements{}
case tenantControlPlane.Spec.ControlPlane.Deployment.Resources.APIServer != nil:
podSpec.Containers[index].Resources = *tenantControlPlane.Spec.ControlPlane.Deployment.Resources.APIServer
default:
podSpec.Containers[index].Resources = corev1.ResourceRequirements{}
}
}
func (d Deployment) buildKubeAPIServerCommand(tenantControlPlane kamajiv1alpha1.TenantControlPlane, address string, current map[string]string) map[string]string {
var extraArgs map[string]string
if tenantControlPlane.Spec.ControlPlane.Deployment.ExtraArgs != nil {
extraArgs = utilities.ArgsFromSliceToMap(tenantControlPlane.Spec.ControlPlane.Deployment.ExtraArgs.APIServer)
}
kubeletPreferredAddressTypes := make([]string, 0, len(tenantControlPlane.Spec.Kubernetes.Kubelet.PreferredAddressTypes))
for _, addressType := range tenantControlPlane.Spec.Kubernetes.Kubelet.PreferredAddressTypes {
kubeletPreferredAddressTypes = append(kubeletPreferredAddressTypes, string(addressType))
}
desiredArgs := map[string]string{
"--allow-privileged": "true",
"--authorization-mode": "Node,RBAC",
"--advertise-address": address,
"--client-ca-file": path.Join(v1beta3.DefaultCertificatesDir, constants.CACertName),
"--enable-admission-plugins": strings.Join(tenantControlPlane.Spec.Kubernetes.AdmissionControllers.ToSlice(), ","),
"--enable-bootstrap-token-auth": "true",
"--service-cluster-ip-range": tenantControlPlane.Spec.NetworkProfile.ServiceCIDR,
"--kubelet-client-certificate": path.Join(v1beta3.DefaultCertificatesDir, constants.APIServerKubeletClientCertName),
"--kubelet-client-key": path.Join(v1beta3.DefaultCertificatesDir, constants.APIServerKubeletClientKeyName),
"--kubelet-preferred-address-types": strings.Join(kubeletPreferredAddressTypes, ","),
"--proxy-client-cert-file": path.Join(v1beta3.DefaultCertificatesDir, constants.FrontProxyClientCertName),
"--proxy-client-key-file": path.Join(v1beta3.DefaultCertificatesDir, constants.FrontProxyClientKeyName),
"--requestheader-allowed-names": constants.FrontProxyClientCertCommonName,
"--requestheader-client-ca-file": path.Join(v1beta3.DefaultCertificatesDir, constants.FrontProxyCACertName),
"--requestheader-extra-headers-prefix": "X-Remote-Extra-",
"--requestheader-group-headers": "X-Remote-Group",
"--requestheader-username-headers": "X-Remote-User",
"--secure-port": fmt.Sprintf("%d", tenantControlPlane.Spec.NetworkProfile.Port),
"--service-account-issuer": "https://kubernetes.default.svc.cluster.local",
"--service-account-key-file": path.Join(v1beta3.DefaultCertificatesDir, constants.ServiceAccountPublicKeyName),
"--service-account-signing-key-file": path.Join(v1beta3.DefaultCertificatesDir, constants.ServiceAccountPrivateKeyName),
"--tls-cert-file": path.Join(v1beta3.DefaultCertificatesDir, constants.APIServerCertName),
"--tls-private-key-file": path.Join(v1beta3.DefaultCertificatesDir, constants.APIServerKeyName),
}
switch d.DataStore.Spec.Driver {
case kamajiv1alpha1.KineMySQLDriver, kamajiv1alpha1.KinePostgreSQLDriver:
desiredArgs["--etcd-servers"] = "http://127.0.0.1:2379"
case kamajiv1alpha1.EtcdDriver:
httpsEndpoints := make([]string, 0, len(d.DataStore.Spec.Endpoints))
for _, ep := range d.DataStore.Spec.Endpoints {
httpsEndpoints = append(httpsEndpoints, fmt.Sprintf("https://%s", ep))
}
desiredArgs["--etcd-compaction-interval"] = "0"
desiredArgs["--etcd-prefix"] = fmt.Sprintf("/%s", tenantControlPlane.Status.Storage.Setup.Schema)
desiredArgs["--etcd-servers"] = strings.Join(httpsEndpoints, ",")
desiredArgs["--etcd-cafile"] = "/etc/kubernetes/pki/etcd/ca.crt"
desiredArgs["--etcd-certfile"] = "/etc/kubernetes/pki/etcd/server.crt"
desiredArgs["--etcd-keyfile"] = "/etc/kubernetes/pki/etcd/server.key"
}
// Order matters, here: extraArgs could try to overwrite some arguments managed by Kamaji and that would be crucial.
// Adding as first element of the array of maps, we're sure that these overrides will be sanitized by our configuration.
return utilities.MergeMaps(extraArgs, current, desiredArgs)
}
func (d Deployment) secretProjection(secretName, certKeyName, keyName string) *corev1.SecretProjection {
return &corev1.SecretProjection{
LocalObjectReference: corev1.LocalObjectReference{
Name: secretName,
},
Items: []corev1.KeyToPath{
{
Key: certKeyName,
Path: certKeyName,
},
{
Key: keyName,
Path: keyName,
},
},
}
}
func (d Deployment) removeKineVolumes(podSpec *corev1.PodSpec) {
for _, volumeName := range []string{kineVolumeCertName, dataStoreCertsVolumeName} {
if found, index := utilities.HasNamedVolume(podSpec.Volumes, volumeName); found {
var volumes []corev1.Volume
volumes = append(volumes, podSpec.Volumes[:index]...)
volumes = append(volumes, podSpec.Volumes[index+1:]...)
podSpec.Volumes = volumes
}
}
}
func (d Deployment) buildKineVolume(podSpec *corev1.PodSpec, tcp kamajiv1alpha1.TenantControlPlane) {
if d.DataStore.Spec.Driver == kamajiv1alpha1.EtcdDriver {
return
}
found, index := utilities.HasNamedVolume(podSpec.Volumes, dataStoreCertsVolumeName)
if !found {
index = len(podSpec.Volumes)
podSpec.Volumes = append(podSpec.Volumes, corev1.Volume{})
}
podSpec.Volumes[index].Name = dataStoreCertsVolumeName
podSpec.Volumes[index].VolumeSource = corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: tcp.Status.Storage.Certificate.SecretName,
DefaultMode: pointer.To(int32(420)),
},
}
// Adding the volume to read Kine certificates:
// these must be subsequently fixed with a chmod due to pg issues with private key.
found, index = utilities.HasNamedVolume(podSpec.Volumes, kineVolumeCertName)
if !found {
index = len(podSpec.Volumes)
podSpec.Volumes = append(podSpec.Volumes, corev1.Volume{})
}
podSpec.Volumes[index].Name = kineVolumeCertName
podSpec.Volumes[index].VolumeSource = corev1.VolumeSource{
EmptyDir: &corev1.EmptyDirVolumeSource{},
}
}
func (d Deployment) removeKineContainers(podSpec *corev1.PodSpec) {
// Removing the kine container, if present
if found, index := utilities.HasNamedContainer(podSpec.Containers, kineContainerName); found {
var containers []corev1.Container
containers = append(containers, podSpec.Containers[:index]...)
containers = append(containers, podSpec.Containers[index+1:]...)
podSpec.Containers = containers
}
// Removing the kine init-container, if present
if found, index := utilities.HasNamedContainer(podSpec.InitContainers, kineInitContainerName); found {
var initContainers []corev1.Container
initContainers = append(initContainers, podSpec.InitContainers[:index]...)
initContainers = append(initContainers, podSpec.InitContainers[index+1:]...)
podSpec.InitContainers = initContainers
}
}
func (d Deployment) buildKine(podSpec *corev1.PodSpec, tcp kamajiv1alpha1.TenantControlPlane) {
if d.DataStore.Spec.Driver == kamajiv1alpha1.EtcdDriver {
d.removeKineContainers(podSpec)
d.removeKineVolumes(podSpec)
return
}
// Ensuring the init container required for kine is present:
// a chmod is required for kine in order to read the certificates to connect to the secured datastore.
found, index := utilities.HasNamedContainer(podSpec.InitContainers, kineInitContainerName)
if !found {
index = len(podSpec.InitContainers)
podSpec.InitContainers = append(podSpec.InitContainers, corev1.Container{})
}
podSpec.InitContainers[index].Name = kineInitContainerName
podSpec.InitContainers[index].Image = d.KineContainerImage
podSpec.InitContainers[index].Command = []string{"sh"}
podSpec.InitContainers[index].Args = []string{
"-c",
"cp /kine/*.* /certs && chmod -R 600 /certs/*.*",
}
podSpec.InitContainers[index].VolumeMounts = []corev1.VolumeMount{
{
Name: dataStoreCertsVolumeName,
ReadOnly: true,
MountPath: "/kine",
},
{
Name: kineVolumeCertName,
MountPath: "/certs",
ReadOnly: false,
},
}
// Kine is expecting an additional container, and it must be removed before proceeding with the additional one
// in order to make this function idempotent.
found, index = utilities.HasNamedContainer(podSpec.Containers, kineContainerName)
if !found {
index = len(podSpec.Containers)
podSpec.Containers = append(podSpec.Containers, corev1.Container{})
}
// Building kine arguments, taking in consideration the user-space ones if provided.
args := map[string]string{}
if tcp.Spec.ControlPlane.Deployment.ExtraArgs != nil {
args = utilities.ArgsFromSliceToMap(tcp.Spec.ControlPlane.Deployment.ExtraArgs.Kine)
}
switch d.DataStore.Spec.Driver {
case kamajiv1alpha1.KineMySQLDriver:
args["--endpoint"] = "mysql://$(DB_USER):$(DB_PASSWORD)@tcp($(DB_CONNECTION_STRING))/$(DB_SCHEMA)"
case kamajiv1alpha1.KinePostgreSQLDriver:
args["--endpoint"] = "postgres://$(DB_USER):$(DB_PASSWORD)@$(DB_CONNECTION_STRING)/$(DB_SCHEMA)"
}
args["--ca-file"] = "/certs/ca.crt"
args["--cert-file"] = "/certs/server.crt"
args["--key-file"] = "/certs/server.key"
podSpec.Containers[index].Name = kineContainerName
podSpec.Containers[index].Image = d.KineContainerImage
podSpec.Containers[index].Command = []string{"/bin/kine"}
podSpec.Containers[index].Args = utilities.ArgsFromMapToSlice(args)
podSpec.Containers[index].VolumeMounts = []corev1.VolumeMount{
{
Name: kineVolumeCertName,
MountPath: "/certs",
ReadOnly: false,
},
}
podSpec.Containers[index].Env = []corev1.EnvVar{
{
Name: "GODEBUG",
Value: "x509ignoreCN=0",
},
}
podSpec.Containers[index].EnvFrom = []corev1.EnvFromSource{
{
SecretRef: &corev1.SecretEnvSource{
LocalObjectReference: corev1.LocalObjectReference{
Name: tcp.Status.Storage.Config.SecretName,
},
},
},
}
podSpec.Containers[index].Ports = []corev1.ContainerPort{
{
ContainerPort: 2379,
Name: "server",
Protocol: corev1.ProtocolTCP,
},
}
podSpec.Containers[index].ImagePullPolicy = corev1.PullAlways
switch {
case tcp.Spec.ControlPlane.Deployment.Resources == nil:
podSpec.Containers[index].Resources = corev1.ResourceRequirements{}
case tcp.Spec.ControlPlane.Deployment.Resources.Kine != nil:
podSpec.Containers[index].Resources = *tcp.Spec.ControlPlane.Deployment.Resources.Kine
default:
podSpec.Containers[index].Resources = corev1.ResourceRequirements{}
}
}
func (d Deployment) setSelector(deploymentSpec *appsv1.DeploymentSpec, tcp kamajiv1alpha1.TenantControlPlane) {
deploymentSpec.Selector = &metav1.LabelSelector{
MatchLabels: map[string]string{
"kamaji.clastix.io/name": tcp.GetName(),
},
}
}
func (d Deployment) setReplicas(deploymentSpec *appsv1.DeploymentSpec, tcp kamajiv1alpha1.TenantControlPlane) {
deploymentSpec.Replicas = tcp.Spec.ControlPlane.Deployment.Replicas
}
func (d Deployment) setRuntimeClass(spec *corev1.PodSpec, tcp kamajiv1alpha1.TenantControlPlane) {
if len(tcp.Spec.ControlPlane.Deployment.RuntimeClassName) > 0 {
spec.RuntimeClassName = pointer.To(tcp.Spec.ControlPlane.Deployment.RuntimeClassName)
return
}
spec.RuntimeClassName = nil
}
func (d Deployment) templateLabels(ctx context.Context, tenantControlPlane *kamajiv1alpha1.TenantControlPlane) (labels map[string]string) {
hash := func(ctx context.Context, namespace, secretName string) string {
h, _ := d.secretHashValue(ctx, d.Client, namespace, secretName)
return h
}
labels = map[string]string{
"kamaji.clastix.io/name": tenantControlPlane.GetName(),
"kamaji.clastix.io/component": "deployment",
"component.kamaji.clastix.io/api-server-certificate": hash(ctx, tenantControlPlane.GetNamespace(), tenantControlPlane.Status.Certificates.APIServer.SecretName),
"component.kamaji.clastix.io/api-server-kubelet-client-certificate": hash(ctx, tenantControlPlane.GetNamespace(), tenantControlPlane.Status.Certificates.APIServerKubeletClient.SecretName),
"component.kamaji.clastix.io/ca": hash(ctx, tenantControlPlane.GetNamespace(), tenantControlPlane.Status.Certificates.CA.SecretName),
"component.kamaji.clastix.io/controller-manager-kubeconfig": hash(ctx, tenantControlPlane.GetNamespace(), tenantControlPlane.Status.KubeConfig.ControllerManager.SecretName),
"component.kamaji.clastix.io/front-proxy-ca-certificate": hash(ctx, tenantControlPlane.GetNamespace(), tenantControlPlane.Status.Certificates.FrontProxyCA.SecretName),
"component.kamaji.clastix.io/front-proxy-client-certificate": hash(ctx, tenantControlPlane.GetNamespace(), tenantControlPlane.Status.Certificates.FrontProxyClient.SecretName),
"component.kamaji.clastix.io/service-account": hash(ctx, tenantControlPlane.GetNamespace(), tenantControlPlane.Status.Certificates.SA.SecretName),
"component.kamaji.clastix.io/scheduler-kubeconfig": hash(ctx, tenantControlPlane.GetNamespace(), tenantControlPlane.Status.KubeConfig.Scheduler.SecretName),
"component.kamaji.clastix.io/datastore": tenantControlPlane.Spec.DataStore,
}
return labels
}
// secretHashValue function returns the md5 value for the secret of the given name and namespace.
func (d Deployment) secretHashValue(ctx context.Context, client client.Client, namespace, name string) (string, error) {
secret := &corev1.Secret{}
if err := client.Get(ctx, types.NamespacedName{Namespace: namespace, Name: name}, secret); err != nil {
return "", errors.Wrap(err, "cannot retrieve *corev1.Secret for resource version retrieval")
}
return d.hashValue(*secret), nil
}
// hashValue function returns the md5 value for the given secret.
func (d Deployment) hashValue(secret corev1.Secret) string {
// Go access map values in random way, it means we have to sort them.
keys := make([]string, 0, len(secret.Data))
for k := range secret.Data {
keys = append(keys, k)
}
sort.Strings(keys)
// Generating MD5 of Secret values, sorted by key
h := md5.New()
for _, key := range keys {
h.Write(secret.Data[key])
}
return fmt.Sprintf("%x", h.Sum(nil))
}
func (d Deployment) setTemplateLabels(template *corev1.PodTemplateSpec, labels map[string]string) {
template.SetLabels(labels)
}