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deploy.go
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deploy.go
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package deploy
import (
"context"
"crypto/md5"
"fmt"
"net/url"
"path"
"github.com/pkg/errors"
kotsv1beta1 "github.com/replicatedhq/kots/kotskinds/apis/kots/v1beta1"
"github.com/replicatedhq/kots/pkg/identity/types"
"github.com/replicatedhq/kots/pkg/image"
"github.com/replicatedhq/kots/pkg/ingress"
kotsadmtypes "github.com/replicatedhq/kots/pkg/kotsadm/types"
kotsadmversion "github.com/replicatedhq/kots/pkg/kotsadm/version"
"github.com/replicatedhq/kots/pkg/template"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
networkingv1 "k8s.io/api/networking/v1"
kuberneteserrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
k8stypes "k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/intstr"
"k8s.io/client-go/kubernetes"
"k8s.io/utils/pointer"
)
var (
KotsIdentityLabelKey = "kots.io/identity"
)
type Options struct {
NamePrefix string
IdentitySpec kotsv1beta1.IdentitySpec
IdentityConfigSpec kotsv1beta1.IdentityConfigSpec
IsOpenShift bool
ImageRewriteFn kotsadmversion.ImageRewriteFunc
ProxyEnv map[string]string
AdditionalLabels map[string]string
Builder *template.Builder
}
func Deploy(ctx context.Context, clientset kubernetes.Interface, namespace string, options Options) error {
issuerURL, err := dexIssuerURL(options.IdentitySpec, options.Builder)
if err != nil {
return errors.Wrap(err, "failed to get dex issuer url")
}
dexConfig, err := getDexConfig(ctx, issuerURL, options)
if err != nil {
return errors.Wrap(err, "failed to get dex config")
}
if err := ensureSecret(ctx, clientset, namespace, dexConfig, options); err != nil {
return errors.Wrap(err, "failed to ensure secret")
}
if err := ensureDexThemeConfigMap(ctx, clientset, namespace, options); err != nil {
return errors.Wrap(err, "failed to ensure dex theme config map")
}
if err := ensureDeployment(ctx, clientset, namespace, issuerURL, dexConfig, options); err != nil {
return errors.Wrap(err, "failed to ensure deployment")
}
if err := ensureService(ctx, clientset, namespace, options); err != nil {
return errors.Wrap(err, "failed to ensure service")
}
if err := ensureIngress(ctx, clientset, namespace, options); err != nil {
return errors.Wrap(err, "failed to ensure ingress")
}
return nil
}
func Configure(ctx context.Context, clientset kubernetes.Interface, namespace string, options Options) error {
issuerURL, err := dexIssuerURL(options.IdentitySpec, options.Builder)
if err != nil {
return errors.Wrap(err, "failed to get dex issuer url")
}
dexConfig, err := getDexConfig(ctx, issuerURL, options)
if err != nil {
return errors.Wrap(err, "failed to get dex config")
}
if err := ensureSecret(ctx, clientset, namespace, dexConfig, options); err != nil {
return errors.Wrap(err, "failed to ensure secret")
}
if err := patchDeploymentSecret(ctx, clientset, namespace, issuerURL, dexConfig, options); err != nil {
return errors.Wrap(err, "failed to patch deployment secret")
}
return nil
}
func AdditionalLabels(namePrefix string, additionalLabels map[string]string) map[string]string {
next := map[string]string{
KotsIdentityLabelKey: namePrefix,
}
for key, value := range additionalLabels {
next[key] = value
}
return next
}
func ensureSecret(ctx context.Context, clientset kubernetes.Interface, namespace string, dexConfig []byte, options Options) error {
secret := secretResource(dexConfig, options)
existingSecret, err := clientset.CoreV1().Secrets(namespace).Get(ctx, secret.Name, metav1.GetOptions{})
if err != nil {
if !kuberneteserrors.IsNotFound(err) {
return errors.Wrap(err, "failed to get existing secret")
}
_, err = clientset.CoreV1().Secrets(namespace).Create(ctx, secret, metav1.CreateOptions{})
if err != nil {
return errors.Wrap(err, "failed to create secret")
}
return nil
}
existingSecret = updateSecret(existingSecret, secret)
_, err = clientset.CoreV1().Secrets(namespace).Update(ctx, existingSecret, metav1.UpdateOptions{})
if err != nil {
return errors.Wrap(err, "failed to update secret")
}
return nil
}
func secretResource(dexConfig []byte, options Options) *corev1.Secret {
return &corev1.Secret{
TypeMeta: metav1.TypeMeta{
APIVersion: "v1",
Kind: "Secret",
},
ObjectMeta: metav1.ObjectMeta{
Name: prefixName(options.NamePrefix, "dex"),
Labels: kotsadmtypes.GetKotsadmLabels(AdditionalLabels(options.NamePrefix, options.AdditionalLabels)),
},
Data: map[string][]byte{
"dexConfig.yaml": dexConfig,
},
}
}
func updateSecret(existingSecret, desiredSecret *corev1.Secret) *corev1.Secret {
existingSecret.Data = desiredSecret.Data
return existingSecret
}
func ensureDeployment(ctx context.Context, clientset kubernetes.Interface, namespace string, issuerURL string, marshalledDexConfig []byte, options Options) error {
configChecksum := fmt.Sprintf("%x", md5.Sum(marshalledDexConfig))
deployment, err := deploymentResource(issuerURL, configChecksum, options)
if err != nil {
return errors.Wrap(err, "failed to get deployment resource")
}
existingDeployment, err := clientset.AppsV1().Deployments(namespace).Get(ctx, deployment.Name, metav1.GetOptions{})
if err != nil {
if !kuberneteserrors.IsNotFound(err) {
return errors.Wrap(err, "failed to get existing deployment")
}
_, err = clientset.AppsV1().Deployments(namespace).Create(ctx, deployment, metav1.CreateOptions{})
if err != nil {
return errors.Wrap(err, "failed to create deployment")
}
return nil
}
existingDeployment = updateDeployment(options.NamePrefix, existingDeployment, deployment)
_, err = clientset.AppsV1().Deployments(namespace).Update(ctx, existingDeployment, metav1.UpdateOptions{})
if err != nil {
return errors.Wrap(err, "failed to update deployment")
}
return nil
}
func patchDeploymentSecret(ctx context.Context, clientset kubernetes.Interface, namespace string, issuerURL string, marshalledDexConfig []byte, options Options) error {
configChecksum := fmt.Sprintf("%x", md5.Sum(marshalledDexConfig))
deployment, err := deploymentResource(issuerURL, configChecksum, options)
if err != nil {
return errors.Wrap(err, "failed to get deployment resource")
}
patch := fmt.Sprintf(`{"spec":{"template":{"metadata":{"annotations":{"kots.io/dex-secret-checksum":"%s"}}}}}`, deployment.Spec.Template.ObjectMeta.Annotations["kots.io/dex-secret-checksum"])
// TODO (ethan): patch readiness and liveness checks if issuer url changes
_, err = clientset.AppsV1().Deployments(namespace).Patch(ctx, deployment.Name, k8stypes.StrategicMergePatchType, []byte(patch), metav1.PatchOptions{})
if err != nil {
return errors.Wrap(err, "failed to patch deployment")
}
return nil
}
var (
dexCPUResource = resource.MustParse("100m")
dexMemoryResource = resource.MustParse("50Mi")
)
func deploymentResource(issuerURL, configChecksum string, options Options) (*appsv1.Deployment, error) {
// TODO: use GetAdminConsoleImage function
dexVersion, err := image.GetTag(image.Dex)
if err != nil {
return nil, err
}
image := fmt.Sprintf("kotsadm/dex:%s", dexVersion)
imagePullSecrets := []corev1.LocalObjectReference{}
if options.ImageRewriteFn != nil {
var err error
image, imagePullSecrets, err = options.ImageRewriteFn(image, false)
if err != nil {
return nil, errors.Wrap(err, "failed to rewrite image")
}
}
var securityContext corev1.PodSecurityContext
if !options.IsOpenShift {
securityContext = corev1.PodSecurityContext{
RunAsUser: pointer.Int64Ptr(1001),
}
}
u, err := url.Parse(issuerURL)
if err != nil {
return nil, errors.Wrap(err, "failed to parse issuer url")
}
env := []corev1.EnvVar{clientSecretEnvVar(options.NamePrefix)}
// TODO (ethan): this will not really work when kotsadm is not rendering this
for name, val := range options.ProxyEnv {
env = append(env, corev1.EnvVar{Name: name, Value: val})
}
secretVolume := configSecretVolume(options.NamePrefix)
themeVolume := dexThemeVolume(options.NamePrefix)
return &appsv1.Deployment{
TypeMeta: metav1.TypeMeta{
APIVersion: "apps/v1",
Kind: "Deployment",
},
ObjectMeta: metav1.ObjectMeta{
Name: types.DeploymentName(options.NamePrefix),
Labels: kotsadmtypes.GetKotsadmLabels(AdditionalLabels(options.NamePrefix, options.AdditionalLabels)),
},
Spec: appsv1.DeploymentSpec{
Replicas: pointer.Int32Ptr(2),
Selector: &metav1.LabelSelector{
MatchLabels: map[string]string{
"app": prefixName(options.NamePrefix, "dex"),
},
},
Template: corev1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{
"app": prefixName(options.NamePrefix, "dex"),
},
Annotations: map[string]string{
"kots.io/dex-secret-checksum": configChecksum,
},
},
Spec: corev1.PodSpec{
Affinity: &corev1.Affinity{
PodAntiAffinity: &corev1.PodAntiAffinity{
PreferredDuringSchedulingIgnoredDuringExecution: []corev1.WeightedPodAffinityTerm{{
Weight: 2,
PodAffinityTerm: corev1.PodAffinityTerm{
LabelSelector: &metav1.LabelSelector{
MatchExpressions: []metav1.LabelSelectorRequirement{{
Key: "app",
Operator: metav1.LabelSelectorOpIn,
Values: []string{
prefixName(options.NamePrefix, "dex"),
},
}},
},
TopologyKey: corev1.LabelHostname,
},
},
}},
},
SecurityContext: &securityContext,
ImagePullSecrets: imagePullSecrets,
Containers: []corev1.Container{
{
Image: image,
ImagePullPolicy: corev1.PullIfNotPresent,
Name: "dex",
Command: []string{"/usr/local/bin/dex", "serve", "/etc/dex/cfg/dexConfig.yaml"},
Ports: []corev1.ContainerPort{
{Name: "http", ContainerPort: 5556},
},
EnvFrom: []corev1.EnvFromSource{postgresSecretEnvFromSource(options.NamePrefix)},
Env: env,
VolumeMounts: []corev1.VolumeMount{
{Name: secretVolume.Name, MountPath: "/etc/dex/cfg"},
{Name: themeVolume.Name, MountPath: "/web/themes/kots"},
},
Resources: corev1.ResourceRequirements{
// Limits: corev1.ResourceList{
// "cpu": dexCPUResource,
// "memory": dexMemoryResource,
// },
Requests: corev1.ResourceList{
"cpu": dexCPUResource,
"memory": dexMemoryResource,
},
},
LivenessProbe: &corev1.Probe{
ProbeHandler: corev1.ProbeHandler{
HTTPGet: &corev1.HTTPGetAction{
Path: path.Join(u.Path, "healthz"),
Port: intstr.FromInt(5556),
},
},
},
ReadinessProbe: &corev1.Probe{
ProbeHandler: corev1.ProbeHandler{
HTTPGet: &corev1.HTTPGetAction{
Path: path.Join(u.Path, "healthz"),
Port: intstr.FromInt(5556),
},
},
InitialDelaySeconds: 5,
TimeoutSeconds: 1,
},
},
},
Volumes: []corev1.Volume{
secretVolume,
themeVolume,
},
},
},
},
}, nil
}
func configSecretVolume(namePrefix string) corev1.Volume {
return corev1.Volume{
Name: "config",
VolumeSource: corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: prefixName(namePrefix, "dex"),
},
},
}
}
func dexThemeVolume(namePrefix string) corev1.Volume {
return corev1.Volume{
Name: "theme",
VolumeSource: corev1.VolumeSource{
ConfigMap: &corev1.ConfigMapVolumeSource{
LocalObjectReference: corev1.LocalObjectReference{
Name: prefixName(namePrefix, "dex-theme"),
},
Optional: pointer.BoolPtr(true),
},
},
}
}
func clientSecretEnvVar(namePrefix string) corev1.EnvVar {
return corev1.EnvVar{
Name: "DEX_CLIENT_SECRET",
ValueFrom: &corev1.EnvVarSource{
SecretKeyRef: &corev1.SecretKeySelector{
LocalObjectReference: corev1.LocalObjectReference{
Name: prefixName(namePrefix, "dex-client"),
},
Key: "DEX_CLIENT_SECRET",
},
},
}
}
func postgresSecretEnvFromSource(namePrefix string) corev1.EnvFromSource {
return corev1.EnvFromSource{
SecretRef: &corev1.SecretEnvSource{
LocalObjectReference: corev1.LocalObjectReference{
Name: prefixName(namePrefix, "dex-postgres"),
},
},
}
}
func updateDeployment(namePrefix string, existingDeployment, desiredDeployment *appsv1.Deployment) *appsv1.Deployment {
if len(existingDeployment.Spec.Template.Spec.Containers) == 0 {
// wtf
return desiredDeployment
}
if existingDeployment.Spec.Template.Annotations == nil {
existingDeployment.Spec.Template.ObjectMeta.Annotations = map[string]string{}
}
existingDeployment.Spec.Template.ObjectMeta.Annotations["kots.io/dex-secret-checksum"] = desiredDeployment.Spec.Template.ObjectMeta.Annotations["kots.io/dex-secret-checksum"]
existingDeployment.Spec.Template.Spec.Containers[0].Image = desiredDeployment.Spec.Template.Spec.Containers[0].Image
existingDeployment.Spec.Template.Spec.Containers[0].LivenessProbe = desiredDeployment.Spec.Template.Spec.Containers[0].LivenessProbe
existingDeployment.Spec.Template.Spec.Containers[0].ReadinessProbe = desiredDeployment.Spec.Template.Spec.Containers[0].ReadinessProbe
existingDeployment.Spec.Template.Spec.Containers[0].Env = desiredDeployment.Spec.Template.Spec.Containers[0].Env
existingDeployment.Spec.Template.Spec.Containers[0].Resources = desiredDeployment.Spec.Template.Spec.Containers[0].Resources
existingDeployment = updateDeploymentConfigSecretVolume(namePrefix, existingDeployment, desiredDeployment)
existingDeployment = updateDeploymentClientSecretEnvVar(namePrefix, existingDeployment, desiredDeployment)
existingDeployment = updateDeploymentPostgresSecretEnvFromSource(namePrefix, existingDeployment, desiredDeployment)
return existingDeployment
}
func updateDeploymentConfigSecretVolume(namePrefix string, existingDeployment *appsv1.Deployment, desiredDeployment *appsv1.Deployment) *appsv1.Deployment {
if len(existingDeployment.Spec.Template.Spec.Containers) == 0 {
return desiredDeployment
}
newConfigSecretVolume := configSecretVolume(namePrefix)
newConfigSecretVolumeMount := corev1.VolumeMount{Name: newConfigSecretVolume.Name, MountPath: "/etc/dex/cfg"}
var existingSecretVolumeName string
for i, volumeMount := range existingDeployment.Spec.Template.Spec.Containers[0].VolumeMounts {
if volumeMount.MountPath == "/etc/dex/cfg" {
existingSecretVolumeName = volumeMount.Name
existingDeployment.Spec.Template.Spec.Containers[0].VolumeMounts[i] = newConfigSecretVolumeMount
break
}
}
if existingSecretVolumeName != "" {
for i, volume := range existingDeployment.Spec.Template.Spec.Volumes {
if volume.Name == existingSecretVolumeName {
existingDeployment.Spec.Template.Spec.Volumes[i] = newConfigSecretVolume
}
}
return existingDeployment
}
existingDeployment.Spec.Template.Spec.Containers[0].VolumeMounts =
append(existingDeployment.Spec.Template.Spec.Containers[0].VolumeMounts, newConfigSecretVolumeMount)
existingDeployment.Spec.Template.Spec.Volumes =
append(existingDeployment.Spec.Template.Spec.Volumes, newConfigSecretVolume)
return existingDeployment
}
func updateDeploymentClientSecretEnvVar(namePrefix string, existingDeployment *appsv1.Deployment, desiredDeployment *appsv1.Deployment) *appsv1.Deployment {
if len(existingDeployment.Spec.Template.Spec.Containers) == 0 {
return desiredDeployment
}
newClientSecretEnvVar := clientSecretEnvVar(namePrefix)
for i, envVar := range existingDeployment.Spec.Template.Spec.Containers[0].Env {
if envVar.Name == "DEX_CLIENT_SECRET" {
existingDeployment.Spec.Template.Spec.Containers[0].Env[i] = newClientSecretEnvVar
return existingDeployment
}
}
existingDeployment.Spec.Template.Spec.Containers[0].Env =
append(existingDeployment.Spec.Template.Spec.Containers[0].Env, newClientSecretEnvVar)
return existingDeployment
}
func updateDeploymentPostgresSecretEnvFromSource(namePrefix string, existingDeployment *appsv1.Deployment, desiredDeployment *appsv1.Deployment) *appsv1.Deployment {
if len(existingDeployment.Spec.Template.Spec.Containers) == 0 {
return desiredDeployment
}
newPostgresSecretEnvFromSource := postgresSecretEnvFromSource(namePrefix)
for _, envFrom := range existingDeployment.Spec.Template.Spec.Containers[0].EnvFrom {
if envFrom.SecretRef.Name == newPostgresSecretEnvFromSource.SecretRef.Name {
return existingDeployment
}
}
existingDeployment.Spec.Template.Spec.Containers[0].EnvFrom =
append(existingDeployment.Spec.Template.Spec.Containers[0].EnvFrom, newPostgresSecretEnvFromSource)
return existingDeployment
}
func ensureService(ctx context.Context, clientset kubernetes.Interface, namespace string, options Options) error {
service := serviceResource(options)
existingService, err := clientset.CoreV1().Services(namespace).Get(ctx, service.Name, metav1.GetOptions{})
if err != nil {
if !kuberneteserrors.IsNotFound(err) {
return errors.Wrap(err, "failed to get existing service")
}
_, err = clientset.CoreV1().Services(namespace).Create(ctx, service, metav1.CreateOptions{})
if err != nil {
return errors.Wrap(err, "failed to create service")
}
return nil
}
existingService = updateService(existingService, service)
_, err = clientset.CoreV1().Services(namespace).Update(ctx, existingService, metav1.UpdateOptions{})
if err != nil {
return errors.Wrap(err, "failed to update service")
}
return nil
}
func serviceResource(options Options) *corev1.Service {
ingressSpec := options.IdentityConfigSpec.IngressConfig
serviceType := corev1.ServiceTypeClusterIP
port := corev1.ServicePort{
Name: "http",
Port: types.ServicePort(),
TargetPort: intstr.FromInt(int(types.ServicePort())),
}
if ingressSpec.Enabled && ingressSpec.NodePort != nil && ingressSpec.NodePort.Port != 0 {
port.NodePort = int32(ingressSpec.NodePort.Port)
serviceType = corev1.ServiceTypeNodePort
}
return &corev1.Service{
TypeMeta: metav1.TypeMeta{
APIVersion: "v1",
Kind: "Service",
},
ObjectMeta: metav1.ObjectMeta{
Name: types.ServiceName(options.NamePrefix),
Labels: kotsadmtypes.GetKotsadmLabels(AdditionalLabels(options.NamePrefix, options.AdditionalLabels)),
},
Spec: corev1.ServiceSpec{
Type: serviceType,
Selector: map[string]string{
"app": prefixName(options.NamePrefix, "dex"),
},
Ports: []corev1.ServicePort{
port,
},
},
}
}
func updateService(existingService, desiredService *corev1.Service) *corev1.Service {
existingService.Spec.Ports = desiredService.Spec.Ports
return existingService
}
func ensureIngress(ctx context.Context, clientset kubernetes.Interface, namespace string, options Options) error {
ingressSpec := options.IdentityConfigSpec.IngressConfig
if !ingressSpec.Enabled || ingressSpec.Ingress == nil {
return deleteIngress(ctx, clientset, namespace, options.NamePrefix)
}
dexIngress := ingressResource(options)
return ingress.EnsureIngress(ctx, clientset, namespace, dexIngress)
}
func ingressResource(options Options) *networkingv1.Ingress {
ingressSpec := options.IdentityConfigSpec.IngressConfig
if ingressSpec.Ingress == nil {
return nil
}
return ingress.IngressFromConfig(
*ingressSpec.Ingress,
prefixName(options.NamePrefix, "dex"),
types.ServiceName(options.NamePrefix),
types.ServicePort(),
AdditionalLabels(options.NamePrefix, options.AdditionalLabels),
)
}
func prefixName(prefix, name string) string {
return fmt.Sprintf("%s-%s", prefix, name)
}