forked from aberestyak/elasticsearch-security-operator
/
role_controller.go
245 lines (222 loc) · 8.59 KB
/
role_controller.go
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/*
Copyright 2021.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package controllers
import (
"context"
"encoding/json"
"errors"
"reflect"
"github.com/go-logr/logr"
log "github.com/sirupsen/logrus"
kerrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
securityv1alpha1 "github.com/OrlovDiga/elasticsearch-security-operator/api/v1alpha1"
config "github.com/OrlovDiga/elasticsearch-security-operator/config"
roles "github.com/OrlovDiga/elasticsearch-security-operator/internal/elasticsearch/roles"
)
const roleFinalizer = "role.security.rshbdev.ru/finalizer"
var roleControllerLogger = log.WithFields(log.Fields{
"component": "RoleController",
})
// RoleReconciler reconciles a Role object
type RoleReconciler struct {
client.Client
Log logr.Logger
Scheme *runtime.Scheme
}
//+kubebuilder:rbac:groups=security.rshbdev.ru,resources=roles,verbs=get;list;watch;create;update;patch;delete
//+kubebuilder:rbac:groups=security.rshbdev.ru,resources=roles/status,verbs=get;update;patch
//+kubebuilder:rbac:groups=security.rshbdev.ru,resources=roles/finalizers,verbs=update
// Reconcile main reconcile loop
func (r *RoleReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
desiredRole := &securityv1alpha1.Role{}
var err = r.Get(ctx, req.NamespacedName, desiredRole)
if err != nil {
if kerrors.IsNotFound(err) {
roleControllerLogger.Info("Resource was deleted")
return ctrl.Result{}, nil
}
roleControllerLogger.Errorf("Error while reading CR Role: %v", err)
return ctrl.Result{}, client.IgnoreNotFound(err)
}
// Call finalyzer to clean up
isdesiredRoleToBeDeleted := desiredRole.GetDeletionTimestamp() != nil
if isdesiredRoleToBeDeleted {
if controllerutil.ContainsFinalizer(desiredRole, roleFinalizer) {
if err := r.FinalizeRole(desiredRole); err != nil {
return ctrl.Result{}, err
}
controllerutil.RemoveFinalizer(desiredRole, roleFinalizer)
err := r.Update(ctx, desiredRole)
if err != nil {
return ctrl.Result{}, err
}
}
return ctrl.Result{}, nil
}
// Add finalizer for this CR
if !controllerutil.ContainsFinalizer(desiredRole, roleFinalizer) {
controllerutil.AddFinalizer(desiredRole, roleFinalizer)
err = r.Update(ctx, desiredRole)
if err != nil {
return ctrl.Result{}, err
}
}
// Map model to RoleAPISpec
roleAPIObject, err := MapRoleAPIObject(desiredRole)
if err != nil {
roleControllerLogger.Errorf("Error when mapping models : %v", err)
return ctrl.Result{}, err
}
apiRoleJSON, err := json.Marshal(roleAPIObject)
if err != nil {
roleControllerLogger.Errorf("Error when marshaling role object: %v", err)
return ctrl.Result{}, err
}
roleExists, existingRoleSpec, err := GetExistingObject(config.AppConfig.ElasticsearchRoleAPIPath, desiredRole.Name)
if err != nil {
roleControllerLogger.Errorf("Error when checking role existence: %v", err.Error())
return ctrl.Result{}, err
}
if !roleExists {
// Create
if err := CreateOrUpdateRole(r, desiredRole, apiRoleJSON); err != nil {
roleControllerLogger.Errorf("Error when creating new role: %v", err.Error())
}
roleControllerLogger.Infof("Created new role: %v. Status: %v", desiredRole.Name, desiredRole.Status.Status)
} else {
// Update
// Trying to get existing role
existingRole := make(map[string]roles.RoleAPISpec, 1)
if err := json.Unmarshal(existingRoleSpec, &existingRole); err != nil {
roleControllerLogger.Errorf("Error when unmarshaling existing role: %v", err.Error())
return ctrl.Result{}, err
}
// Compare existing and desired role spec
if !reflect.DeepEqual(existingRole[desiredRole.Name], roleAPIObject) {
if err := CreateOrUpdateRole(r, desiredRole, apiRoleJSON); err != nil {
roleControllerLogger.Errorf("Error when updating role: %v", err.Error())
}
roleControllerLogger.Infof("Updated role: %v. Status: %v", desiredRole.Name, desiredRole.Status.Status)
}
// Create or update roleMapping, no matter is this create or update operation and update role status
if err := CreateRoleMapping(desiredRole); err != nil {
if err := SetRoleStatus(r, desiredRole, "Error", []byte(err.Error())); err != nil {
roleControllerLogger.Errorf("Error when setting role status: %v", err.Error())
}
}
// Create tenant, no matter is this create or update operation and update role status
if err := CreateTenant(desiredRole); err != nil {
if err := SetRoleStatus(r, desiredRole, "Error", []byte(err.Error())); err != nil {
roleControllerLogger.Errorf("Error when setting role status: %v", err.Error())
}
}
}
return ctrl.Result{}, nil
}
// MapRoleAPIObject - map CRD model to API
func MapRoleAPIObject(role *securityv1alpha1.Role) (*roles.RoleAPISpec, error) {
var roleAPI roles.RoleAPISpec
buf, _ := json.Marshal(role.Spec)
if err := json.Unmarshal(buf, &roleAPI); err != nil {
return nil, err
}
return &roleAPI, nil
}
// SetRoleStatus - parse http response code, set status and update CR
func SetRoleStatus(r *RoleReconciler, role *securityv1alpha1.Role, responseResult string, responseBody []byte) error {
role.Status = securityv1alpha1.RoleStatus{
Status: responseResult,
Error: func(response string, responseBody []byte) string {
if response == "Error" {
return string(responseBody)
}
return ""
}(responseResult, responseBody),
}
if err := r.Client.Status().Update(context.TODO(), role); err != nil {
return errors.New("Error when setting status: " + err.Error())
}
return nil
}
// CreateOrUpdateRole - make PUT request to create or update Role
func CreateOrUpdateRole(r *RoleReconciler, role *securityv1alpha1.Role, jsonRole []byte) error {
_, responseResult, responseBody, err := MakeAPIRequest("PUT", config.AppConfig.ElasticsearchRoleAPIPath+"/"+role.Name, jsonRole)
if err != nil {
return errors.New("Error when creating new role: " + err.Error())
}
if err := SetRoleStatus(r, role, responseResult, responseBody); err != nil {
return err
}
roleControllerLogger.Infof("Updated role: %v", role.Name)
return nil
}
// CreateTenant - make PUT request to create or update Tenant
func CreateTenant(role *securityv1alpha1.Role) error {
// Must provide description
description := map[string]string{"description": role.Name}
descriptionJSON, _ := json.Marshal(description)
for _, tenantPattern := range role.Spec.TenantPermissions {
for _, tenant := range tenantPattern.TenantPatterns {
// Don't update default global tenant
if tenant != "global_tenant" {
_, _, _, err := MakeAPIRequest("PUT", config.AppConfig.ElasticsearchTenantAPIPath+"/"+tenant, descriptionJSON)
if err != nil {
return errors.New("Error when updating tenant: " + err.Error())
}
roleControllerLogger.Infof("Updated tenant: %v", tenant)
}
}
}
return nil
}
// DeleteTenant - make DELETE request to delete tenant
func DeleteTenant(tenant string) error {
// Don't delete default global tenant
if tenant != "global_tenant" {
_, _, _, err := MakeAPIRequest("DELETE", config.AppConfig.ElasticsearchTenantAPIPath+"/"+tenant, nil)
if err != nil {
roleControllerLogger.Errorf("Error when deleting tenant: %v", err.Error())
return err
}
}
return nil
}
// SetupWithManager sets up the controller with the Manager.
func (r *RoleReconciler) SetupWithManager(mgr ctrl.Manager) error {
return ctrl.NewControllerManagedBy(mgr).
For(&securityv1alpha1.Role{}).
Complete(r)
}
// FinalizeRole delete role
func (r *RoleReconciler) FinalizeRole(role *securityv1alpha1.Role) error {
for _, tenantPattern := range role.Spec.TenantPermissions {
for _, tenant := range tenantPattern.TenantPatterns {
if err := DeleteTenant(tenant); err != nil {
roleControllerLogger.Errorf("Error when finalyzing role: %v", err.Error())
return err
}
roleControllerLogger.Infof("Updated tenant: %v", tenant)
}
}
_, _, _, err := MakeAPIRequest("DELETE", config.AppConfig.ElasticsearchRoleAPIPath+"/"+role.Name, nil)
if err != nil {
roleControllerLogger.Errorf("Error when finalyzing role: %v", err.Error())
return err
}
roleControllerLogger.Infof("Successfully finalized role: %v", role.Name)
return nil
}