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clickhouseuser_controller.go
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/
clickhouseuser_controller.go
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// Copyright (c) 2022 Aiven, Helsinki, Finland. https://aiven.io/
package controllers
import (
"context"
"crypto/rand"
"encoding/base64"
"fmt"
"strconv"
"github.com/aiven/aiven-go-client"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/meta"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"github.com/aiven/aiven-operator/api/v1alpha1"
)
// ClickhouseUserReconciler reconciles a ClickhouseUser object
type ClickhouseUserReconciler struct {
Controller
}
//+kubebuilder:rbac:groups=aiven.io,resources=clickhouseusers,verbs=get;list;watch;create;update;patch;delete
//+kubebuilder:rbac:groups=aiven.io,resources=clickhouseusers/status,verbs=get;update;patch
//+kubebuilder:rbac:groups=aiven.io,resources=clickhouseusers/finalizers,verbs=update
func (r *ClickhouseUserReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
return r.reconcileInstance(ctx, req, &clickhouseUserHandler{}, &v1alpha1.ClickhouseUser{})
}
// SetupWithManager sets up the controller with the Manager.
func (r *ClickhouseUserReconciler) SetupWithManager(mgr ctrl.Manager) error {
return ctrl.NewControllerManagedBy(mgr).
For(&v1alpha1.ClickhouseUser{}).
Owns(&corev1.Secret{}).
Complete(r)
}
type clickhouseUserHandler struct{}
func (h *clickhouseUserHandler) createOrUpdate(avn *aiven.Client, obj client.Object, _ []client.Object) error {
user, err := h.convert(obj)
if err != nil {
return err
}
r, err := avn.ClickhouseUser.Create(user.Spec.Project, user.Spec.ServiceName, user.Name)
if err != nil {
return err
}
if err != nil && !aiven.IsAlreadyExists(err) {
return fmt.Errorf("cannot createOrUpdate clickhouse user on aiven side: %w", err)
}
user.Status.UUID = r.User.UUID
meta.SetStatusCondition(&user.Status.Conditions,
getInitializedCondition("Created",
"Instance was created or update on Aiven side"))
meta.SetStatusCondition(&user.Status.Conditions,
getRunningCondition(metav1.ConditionUnknown, "Created",
"Instance was created or update on Aiven side, status remains unknown"))
metav1.SetMetaDataAnnotation(&user.ObjectMeta,
processedGenerationAnnotation, strconv.FormatInt(user.GetGeneration(), formatIntBaseDecimal))
return nil
}
func (h *clickhouseUserHandler) delete(avn *aiven.Client, obj client.Object) (bool, error) {
user, err := h.convert(obj)
if err != nil {
return false, err
}
// Not processed yet
if user.Status.UUID == "" {
return true, nil
}
err = avn.ClickhouseUser.Delete(user.Spec.Project, user.Spec.ServiceName, user.Status.UUID)
if !aiven.IsNotFound(err) {
return false, err
}
return true, nil
}
func (h *clickhouseUserHandler) get(avn *aiven.Client, obj client.Object) (*corev1.Secret, error) {
user, err := h.convert(obj)
if err != nil {
return nil, err
}
s, err := avn.Services.Get(user.Spec.Project, user.Spec.ServiceName)
if err != nil {
return nil, err
}
// By design this handler can't create secret in createOrUpdate method,
// while password is returned on create only.
// And all other GET methods return empty password, even this one.
// So the only way to have a secret here is to reset it manually
password := randPassword(maxUserPasswordLength)
_, err = avn.ClickhouseUser.ResetPassword(user.Spec.Project, user.Spec.ServiceName, user.Status.UUID, password)
if err != nil {
return nil, err
}
params := s.URIParams
secret := &corev1.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: h.getSecretName(user),
Namespace: user.Namespace,
},
StringData: map[string]string{
"HOST": params["host"],
"PORT": params["port"],
"PASSWORD": password,
"USERNAME": user.Name,
},
}
meta.SetStatusCondition(&user.Status.Conditions,
getRunningCondition(metav1.ConditionTrue, "CheckRunning",
"Instance is running on Aiven side"))
metav1.SetMetaDataAnnotation(&user.ObjectMeta, instanceIsRunningAnnotation, "true")
return secret, nil
}
func (h *clickhouseUserHandler) checkPreconditions(avn *aiven.Client, obj client.Object) (bool, error) {
user, err := h.convert(obj)
if err != nil {
return false, err
}
meta.SetStatusCondition(&user.Status.Conditions,
getInitializedCondition("Preconditions", "Checking preconditions"))
return checkServiceIsRunning(avn, user.Spec.Project, user.Spec.ServiceName)
}
func (h *clickhouseUserHandler) convert(i client.Object) (*v1alpha1.ClickhouseUser, error) {
user, ok := i.(*v1alpha1.ClickhouseUser)
if !ok {
return nil, fmt.Errorf("cannot convert object to ClickhouseUser")
}
return user, nil
}
func (h *clickhouseUserHandler) getSecretName(user *v1alpha1.ClickhouseUser) string {
if user.Spec.ConnInfoSecretTarget.Name != "" {
return user.Spec.ConnInfoSecretTarget.Name
}
return user.Name
}
const maxUserPasswordLength = 24
func randPassword(len int) string {
buff := make([]byte, len)
_, _ = rand.Read(buff)
str := base64.StdEncoding.EncodeToString(buff)
return str[:len]
}