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rolebinding.go
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rolebinding.go
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package kube
import (
"context"
"encoding/json"
"fmt"
"strings"
"github.com/equinor/radix-operator/pkg/apis/defaults/k8s"
"github.com/equinor/radix-operator/pkg/apis/utils/slice"
"github.com/rs/zerolog/log"
corev1 "k8s.io/api/core/v1"
rbacv1 "k8s.io/api/rbac/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/strategicpatch"
)
// GetRoleBindingGroups Get subjects for list of ad groups
func GetRoleBindingGroups(groups []string) []rbacv1.Subject {
subjects := []rbacv1.Subject{}
for _, group := range groups {
subjects = append(subjects, rbacv1.Subject{
Kind: rbacv1.GroupKind,
Name: group,
APIGroup: rbacv1.GroupName,
})
}
return subjects
}
// GetRolebindingToRole Get role binding object
func GetRolebindingToRole(appName, roleName string, groups []string) *rbacv1.RoleBinding {
return GetRolebindingToRoleWithLabels(roleName, groups, map[string]string{
RadixAppLabel: appName,
})
}
// GetRolebindingToRoleWithLabels Get role binding object
func GetRolebindingToRoleWithLabels(roleName string, groups []string, labels map[string]string) *rbacv1.RoleBinding {
subjects := GetRoleBindingGroups(groups)
return getRoleBindingForSubjects(roleName, k8s.KindRole, subjects, labels)
}
// GetRolebindingToRoleWithLabelsForSubjects Get rolebinding object with subjects as input
func GetRolebindingToRoleWithLabelsForSubjects(roleName string, subjects []rbacv1.Subject, labels map[string]string) *rbacv1.RoleBinding {
return getRoleBindingForSubjects(roleName, k8s.KindRole, subjects, labels)
}
// GetRolebindingToClusterRole Get role binding object
func GetRolebindingToClusterRole(appName, roleName string, groups []string) *rbacv1.RoleBinding {
return GetRolebindingToClusterRoleWithLabels(roleName, groups, map[string]string{
RadixAppLabel: appName,
})
}
// GetRolebindingToClusterRoleForSubjects Get role binding object for list of subjects
func GetRolebindingToClusterRoleForSubjects(appName, roleName string, subjects []rbacv1.Subject) *rbacv1.RoleBinding {
return GetRolebindingToClusterRoleForSubjectsWithLabels(roleName, subjects, map[string]string{
RadixAppLabel: appName,
})
}
// GetRolebindingToClusterRoleForSubjectsWithLabels Get role binding object for list of subjects with labels set
func GetRolebindingToClusterRoleForSubjectsWithLabels(roleName string, subjects []rbacv1.Subject, labels map[string]string) *rbacv1.RoleBinding {
return getRoleBindingForSubjects(roleName, k8s.KindClusterRole, subjects, labels)
}
// GetRolebindingToClusterRoleWithLabels Get role binding object
func GetRolebindingToClusterRoleWithLabels(roleName string, groups []string, labels map[string]string) *rbacv1.RoleBinding {
subjects := GetRoleBindingGroups(groups)
return getRoleBindingForSubjects(roleName, k8s.KindClusterRole, subjects, labels)
}
// GetRolebindingToRoleForSubjectsWithLabels Get role binding object for list of subjects with labels set
func GetRolebindingToRoleForSubjectsWithLabels(appName, roleName string, subjects []rbacv1.Subject, labels map[string]string) *rbacv1.RoleBinding {
return getRoleBindingForSubjects(roleName, k8s.KindRole, subjects, labels)
}
// GetRolebindingToRoleForServiceAccountWithLabels Get role binding object
func GetRolebindingToRoleForServiceAccountWithLabels(roleName, serviceAccountName, serviceAccountNamespace string, labels map[string]string) *rbacv1.RoleBinding {
subjects := []rbacv1.Subject{
{
Kind: rbacv1.ServiceAccountKind,
Name: serviceAccountName,
Namespace: serviceAccountNamespace,
}}
return getRoleBindingForSubjects(roleName, k8s.KindRole, subjects, labels)
}
// GetRolebindingToClusterRoleForServiceAccountWithLabels Get role binding object
func GetRolebindingToClusterRoleForServiceAccountWithLabels(roleName, serviceAccountName, serviceAccountNamespace string, labels map[string]string) *rbacv1.RoleBinding {
subjects := []rbacv1.Subject{
{
Kind: rbacv1.ServiceAccountKind,
Name: serviceAccountName,
Namespace: serviceAccountNamespace,
}}
return getRoleBindingForSubjects(roleName, k8s.KindClusterRole, subjects, labels)
}
func getRoleBindingForSubjects(roleName, kind string, subjects []rbacv1.Subject, labels map[string]string) *rbacv1.RoleBinding {
return &rbacv1.RoleBinding{
TypeMeta: metav1.TypeMeta{
APIVersion: rbacv1.SchemeGroupVersion.Identifier(),
Kind: k8s.KindRoleBinding,
},
ObjectMeta: metav1.ObjectMeta{
Name: roleName,
Labels: labels,
},
RoleRef: rbacv1.RoleRef{
APIGroup: rbacv1.GroupName,
Kind: kind,
Name: roleName,
},
Subjects: subjects,
}
}
// ApplyRoleBinding Creates or updates role
func (kubeutil *Kube) ApplyRoleBinding(namespace string, role *rbacv1.RoleBinding) error {
log.Debug().Msgf("Apply role binding %s", role.Name)
oldRoleBinding, err := kubeutil.GetRoleBinding(namespace, role.GetName())
if err != nil && errors.IsNotFound(err) {
createdRoleBinding, err := kubeutil.kubeClient.RbacV1().RoleBindings(namespace).Create(context.TODO(), role, metav1.CreateOptions{})
if err != nil {
return fmt.Errorf("failed to create role binding object: %v", err)
}
log.Debug().Msgf("Created role binding: %s in namespace %s", createdRoleBinding.Name, namespace)
return nil
} else if err != nil {
return fmt.Errorf("failed to get role binding object: %v", err)
}
log.Debug().Msgf("Role binding object %s already exists in namespace %s, updating the object now", role.GetName(), namespace)
newRoleBinding := oldRoleBinding.DeepCopy()
newRoleBinding.ObjectMeta.OwnerReferences = role.ObjectMeta.OwnerReferences
newRoleBinding.ObjectMeta.Labels = role.Labels
newRoleBinding.Subjects = role.Subjects
oldRoleBindingJSON, err := json.Marshal(oldRoleBinding)
if err != nil {
return fmt.Errorf("failed to marshal old role binding object: %v", err)
}
newRoleBindingJSON, err := json.Marshal(newRoleBinding)
if err != nil {
return fmt.Errorf("failed to marshal new role binding object: %v", err)
}
patchBytes, err := strategicpatch.CreateTwoWayMergePatch(oldRoleBindingJSON, newRoleBindingJSON, rbacv1.RoleBinding{})
if err != nil {
return fmt.Errorf("failed to create two way merge patch role binding objects: %v", err)
}
if !IsEmptyPatch(patchBytes) {
patchedRoleBinding, err := kubeutil.kubeClient.RbacV1().RoleBindings(namespace).Patch(context.TODO(), role.GetName(), types.StrategicMergePatchType, patchBytes, metav1.PatchOptions{})
if err != nil {
return fmt.Errorf("failed to patch role binding object: %v", err)
}
log.Debug().Msgf("Patched role binding: %s in namespace %s", patchedRoleBinding.Name, namespace)
} else {
log.Debug().Msgf("No need to patch role binding: %s ", role.GetName())
}
return nil
}
// ApplyClusterRoleBinding Creates or updates cluster-role-binding
func (kubeutil *Kube) ApplyClusterRoleBinding(clusterrolebinding *rbacv1.ClusterRoleBinding) error {
log.Debug().Msgf("Apply clusterrolebinding %s", clusterrolebinding.Name)
oldClusterRoleBinding, err := kubeutil.kubeClient.RbacV1().ClusterRoleBindings().Get(context.TODO(), clusterrolebinding.Name, metav1.GetOptions{})
if err != nil && errors.IsNotFound(err) {
createdClusterRoleBinding, err := kubeutil.kubeClient.RbacV1().ClusterRoleBindings().Create(context.TODO(), clusterrolebinding, metav1.CreateOptions{})
if err != nil {
return fmt.Errorf("failed to create cluster role binding object: %v", err)
}
log.Debug().Msgf("Created cluster role binding: %s", createdClusterRoleBinding.Name)
return nil
} else if err != nil {
return fmt.Errorf("failed to get cluster role binding object: %v", err)
}
log.Debug().Msgf("Role binding object %s already exists, updating the object now", clusterrolebinding.GetName())
newClusterRoleBinding := oldClusterRoleBinding.DeepCopy()
newClusterRoleBinding.ObjectMeta.OwnerReferences = clusterrolebinding.OwnerReferences
newClusterRoleBinding.ObjectMeta.Labels = clusterrolebinding.Labels
newClusterRoleBinding.Subjects = clusterrolebinding.Subjects
oldClusterRoleBindingJSON, err := json.Marshal(oldClusterRoleBinding)
if err != nil {
return fmt.Errorf("failed to marshal old cluster role binding object: %v", err)
}
newClusterRoleBindingJSON, err := json.Marshal(newClusterRoleBinding)
if err != nil {
return fmt.Errorf("failed to marshal new cluster role binding object: %v", err)
}
patchBytes, err := strategicpatch.CreateTwoWayMergePatch(oldClusterRoleBindingJSON, newClusterRoleBindingJSON, rbacv1.ClusterRoleBinding{})
if err != nil {
return fmt.Errorf("failed to create two way merge patch cluster role binding objects: %v", err)
}
if !IsEmptyPatch(patchBytes) {
patchedClusterRoleBinding, err := kubeutil.kubeClient.RbacV1().ClusterRoleBindings().Patch(context.TODO(), clusterrolebinding.GetName(), types.StrategicMergePatchType, patchBytes, metav1.PatchOptions{})
if err != nil {
return fmt.Errorf("failed to patch cluster role binding object: %v", err)
}
log.Debug().Msgf("Patched cluster role binding: %s ", patchedClusterRoleBinding.Name)
} else {
log.Debug().Msgf("No need to patch cluster role binding: %s ", clusterrolebinding.GetName())
}
return nil
}
// ApplyClusterRoleBindingToServiceAccount Creates cluster-role-binding as a link between cluster role and service account
func (kubeutil *Kube) ApplyClusterRoleBindingToServiceAccount(roleName string, serviceAccount *corev1.ServiceAccount, ownerReference []metav1.OwnerReference) error {
rolebinding := &rbacv1.ClusterRoleBinding{
TypeMeta: metav1.TypeMeta{
APIVersion: rbacv1.SchemeGroupVersion.Identifier(),
Kind: k8s.KindClusterRoleBinding,
},
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-%s", serviceAccount.Namespace, serviceAccount.Name),
OwnerReferences: ownerReference,
},
RoleRef: rbacv1.RoleRef{
APIGroup: rbacv1.GroupName,
Kind: k8s.KindClusterRole,
Name: roleName,
},
Subjects: []rbacv1.Subject{
{
Kind: rbacv1.ServiceAccountKind,
Name: serviceAccount.Name,
Namespace: serviceAccount.Namespace,
},
},
}
return kubeutil.ApplyClusterRoleBinding(rolebinding)
}
// ApplyRoleBindingToServiceAccount Creates role-binding as a link between role and service account
func (kubeutil *Kube) ApplyRoleBindingToServiceAccount(roleKind, roleName, namespace string, serviceAccount *corev1.ServiceAccount, ownerReference []metav1.OwnerReference) error {
rolebinding := &rbacv1.RoleBinding{
TypeMeta: metav1.TypeMeta{
APIVersion: rbacv1.SchemeGroupVersion.Identifier(),
Kind: k8s.KindRoleBinding,
},
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-%s-%s", roleName, strings.ToLower(roleKind), serviceAccount.Name),
Namespace: namespace,
OwnerReferences: ownerReference,
},
RoleRef: rbacv1.RoleRef{
APIGroup: rbacv1.GroupName,
Kind: roleKind,
Name: roleName,
},
Subjects: []rbacv1.Subject{
{
Kind: rbacv1.ServiceAccountKind,
Name: serviceAccount.Name,
Namespace: serviceAccount.Namespace,
},
},
}
return kubeutil.ApplyRoleBinding(namespace, rolebinding)
}
// GetRoleBinding Gets rolebinding
func (kubeutil *Kube) GetRoleBinding(namespace, name string) (*rbacv1.RoleBinding, error) {
var role *rbacv1.RoleBinding
var err error
if kubeutil.RoleBindingLister != nil {
role, err = kubeutil.RoleBindingLister.RoleBindings(namespace).Get(name)
if err != nil {
return nil, err
}
} else {
role, err = kubeutil.kubeClient.RbacV1().RoleBindings(namespace).Get(context.TODO(), name, metav1.GetOptions{})
if err != nil {
return nil, err
}
}
return role, nil
}
// ListRoleBindings Lists role bindings from cache or from cluster
func (kubeutil *Kube) ListRoleBindings(namespace string) ([]*rbacv1.RoleBinding, error) {
return kubeutil.ListRoleBindingsWithSelector(namespace, "")
}
// ListRoleBindingsWithSelector Lists role bindings from cache or from cluster using a selector
func (kubeutil *Kube) ListRoleBindingsWithSelector(namespace string, labelSelectorString string) ([]*rbacv1.RoleBinding, error) {
var roleBindings []*rbacv1.RoleBinding
if kubeutil.RoleBindingLister != nil {
selector, err := labels.Parse(labelSelectorString)
if err != nil {
return nil, err
}
roleBindings, err = kubeutil.RoleBindingLister.RoleBindings(namespace).List(selector)
if err != nil {
return nil, err
}
} else {
listOptions := metav1.ListOptions{
LabelSelector: labelSelectorString,
}
list, err := kubeutil.kubeClient.RbacV1().RoleBindings(namespace).List(context.TODO(), listOptions)
if err != nil {
return nil, err
}
roleBindings = slice.PointersOf(list.Items).([]*rbacv1.RoleBinding)
}
return roleBindings, nil
}
// ListClusterRoleBindingsWithSelector List cluster roles
func (kubeutil *Kube) ListClusterRoleBindingsWithSelector(labelSelectorString string) ([]*rbacv1.ClusterRoleBinding, error) {
var clusterRoleBindings []*rbacv1.ClusterRoleBinding
if kubeutil.ClusterRoleBindingLister != nil {
selector, err := labels.Parse(labelSelectorString)
if err != nil {
return nil, err
}
clusterRoleBindings, err = kubeutil.ClusterRoleBindingLister.List(selector)
if err != nil {
return nil, err
}
} else {
listOptions := metav1.ListOptions{
LabelSelector: labelSelectorString,
}
list, err := kubeutil.kubeClient.RbacV1().ClusterRoleBindings().List(context.TODO(), listOptions)
if err != nil {
return nil, err
}
clusterRoleBindings = slice.PointersOf(list.Items).([]*rbacv1.ClusterRoleBinding)
}
return clusterRoleBindings, nil
}
// DeleteClusterRoleBinding Deletes a clusterrolebinding
func (kubeutil *Kube) DeleteClusterRoleBinding(name string) error {
_, err := kubeutil.GetClusterRoleBinding(name)
if err != nil && errors.IsNotFound(err) {
return nil
} else if err != nil {
return fmt.Errorf("failed to get clusterrolebinding object: %v", err)
}
err = kubeutil.kubeClient.RbacV1().ClusterRoleBindings().Delete(context.TODO(), name, metav1.DeleteOptions{})
if err != nil {
return fmt.Errorf("failed to delete clusterrolebinding object: %v", err)
}
return nil
}
// DeleteRoleBinding Deletes a rolebinding in a namespace
func (kubeutil *Kube) DeleteRoleBinding(namespace, name string) error {
_, err := kubeutil.GetRoleBinding(namespace, name)
if err != nil && errors.IsNotFound(err) {
return nil
} else if err != nil {
return fmt.Errorf("failed to get rolebinding object: %v", err)
}
err = kubeutil.kubeClient.RbacV1().RoleBindings(namespace).Delete(context.TODO(), name, metav1.DeleteOptions{})
if err != nil {
return fmt.Errorf("failed to delete rolebinding object: %v", err)
}
return nil
}
// GetClusterRoleBinding Gets cluster role binding
func (kubeutil *Kube) GetClusterRoleBinding(name string) (*rbacv1.ClusterRoleBinding, error) {
var clusterRoleBinding *rbacv1.ClusterRoleBinding
var err error
if kubeutil.ClusterRoleBindingLister != nil {
clusterRoleBinding, err = kubeutil.ClusterRoleBindingLister.Get(name)
if err != nil {
return nil, err
}
} else {
clusterRoleBinding, err = kubeutil.kubeClient.RbacV1().ClusterRoleBindings().Get(context.TODO(), name, metav1.GetOptions{})
if err != nil {
return nil, err
}
}
return clusterRoleBinding, nil
}