/
rbac.go
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/
rbac.go
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package globalhelper
import (
"context"
"fmt"
"time"
"github.com/golang/glog"
. "github.com/onsi/gomega"
corev1 "k8s.io/api/core/v1"
rbacv1 "k8s.io/api/rbac/v1"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
corev1Typed "k8s.io/client-go/kubernetes/typed/core/v1"
rbacv1Typed "k8s.io/client-go/kubernetes/typed/rbac/v1"
"k8s.io/utils/ptr"
)
// CreateServiceAccount creates a service account.
func CreateServiceAccount(serviceAccountName, namespace string) error {
return createServiceAccount(GetAPIClient().K8sClient.CoreV1(), serviceAccountName, namespace)
}
func createServiceAccount(client corev1Typed.CoreV1Interface, serviceAccountName, namespace string) error {
serviceAccount := corev1.ServiceAccount{
ObjectMeta: metav1.ObjectMeta{
Name: serviceAccountName,
Namespace: namespace}}
_, err :=
client.ServiceAccounts(namespace).Create(context.TODO(), &serviceAccount, metav1.CreateOptions{})
if k8serrors.IsAlreadyExists(err) {
glog.V(5).Info(fmt.Sprintf("serviceaccount %s already installed", serviceAccountName))
return nil
}
return err
}
// DeleteServiceAccount deletes a service account.
func DeleteServiceAccount(serviceAccountName, namespace string) error {
return deleteServiceAccount(GetAPIClient().K8sClient.CoreV1(), serviceAccountName, namespace)
}
func deleteServiceAccount(client corev1Typed.CoreV1Interface, serviceAccountName, namespace string) error {
serviceAccount, err := client.ServiceAccounts(namespace).Get(context.TODO(), serviceAccountName, metav1.GetOptions{})
if k8serrors.IsNotFound(err) {
return nil
}
if serviceAccount == nil {
return err
}
err = client.ServiceAccounts(namespace).Delete(context.TODO(), serviceAccountName,
metav1.DeleteOptions{})
if err != nil {
return fmt.Errorf("failed to delete serviceaccount %w", err)
}
return nil
}
func DefineRole(roleName, namespace string) *rbacv1.Role {
return &rbacv1.Role{
TypeMeta: metav1.TypeMeta{
Kind: "Role",
APIVersion: "v1",
},
ObjectMeta: metav1.ObjectMeta{
Name: roleName,
Namespace: namespace,
},
Rules: []rbacv1.PolicyRule{{
APIGroups: []string{"*"},
Resources: []string{"*"},
Verbs: []string{"*"},
},
},
}
}
func RedefineRoleWithAPIGroups(role *rbacv1.Role, newAPIGroups []string) {
role.Rules[0].APIGroups = newAPIGroups
}
func RedefineRoleWithResources(role *rbacv1.Role, newResources []string) {
role.Rules[0].Resources = newResources
}
// CreateRole creates a role.
func CreateRole(aRole *rbacv1.Role) error {
return createRole(GetAPIClient().K8sClient.RbacV1(), aRole)
}
func createRole(client rbacv1Typed.RbacV1Interface, aRole *rbacv1.Role) error {
_, err :=
client.Roles(aRole.Namespace).Create(context.TODO(), aRole, metav1.CreateOptions{})
if k8serrors.IsAlreadyExists(err) {
glog.V(5).Info(fmt.Sprintf("role %s already installed", aRole.Name))
return nil
}
return err
}
// DeleteRole deletes a role.
func DeleteRole(roleName, namespace string) error {
return deleteRole(GetAPIClient().K8sClient.RbacV1(), roleName, namespace)
}
func deleteRole(client rbacv1Typed.RbacV1Interface, roleName, namespace string) error {
err :=
client.Roles(namespace).Delete(context.TODO(), roleName, metav1.DeleteOptions{})
if k8serrors.IsNotFound(err) {
glog.V(5).Info(fmt.Sprintf("role %s does not exist", roleName))
return nil
}
return err
}
// DeleteRoleBinding deletes a role binding.
func DeleteRoleBinding(roleBindingName, namespace string) error {
return deleteRoleBinding(GetAPIClient().K8sClient.RbacV1(), roleBindingName, namespace)
}
func deleteRoleBinding(client rbacv1Typed.RbacV1Interface, bindingName, namespace string) error {
err :=
client.RoleBindings(namespace).Delete(context.TODO(), bindingName, metav1.DeleteOptions{})
if k8serrors.IsNotFound(err) {
glog.V(5).Info(fmt.Sprintf("rolebinding %s does not exist", bindingName))
return nil
}
return err
}
// CreateRoleBindingWithServiceAccountSubject creates a role binding with a service account subject.
func CreateRoleBindingWithServiceAccountSubject(bindingName, roleName, serviceAccountName,
serviceAccountNamespace, namespace string) error {
return createRoleBindingWithServiceAccountSubject(GetAPIClient().K8sClient.RbacV1(), bindingName, roleName,
serviceAccountName, serviceAccountNamespace, namespace)
}
func createRoleBindingWithServiceAccountSubject(client rbacv1Typed.RbacV1Interface, bindingName, roleName, serviceAccountName,
serviceAccountNamespace, namespace string) error {
aRoleBinding := rbacv1.RoleBinding{
TypeMeta: metav1.TypeMeta{
Kind: "RoleBinding",
APIVersion: "v1",
},
ObjectMeta: metav1.ObjectMeta{
Name: bindingName,
Namespace: namespace,
},
Subjects: []rbacv1.Subject{{
Kind: "ServiceAccount",
Name: serviceAccountName,
Namespace: serviceAccountNamespace,
}},
RoleRef: rbacv1.RoleRef{
Kind: "Role",
Name: roleName,
APIGroup: "rbac.authorization.k8s.io",
},
}
_, err :=
client.RoleBindings(namespace).Create(context.TODO(), &aRoleBinding, metav1.CreateOptions{})
if k8serrors.IsAlreadyExists(err) {
glog.V(5).Info(fmt.Sprintf("rolebinding %s already exists", bindingName))
return nil
}
return err
}
// CreatePersistentVolume creates a persistent volume.
func CreatePersistentVolume(persistentVolume *corev1.PersistentVolume) error {
return createPersistentVolume(GetAPIClient().K8sClient.CoreV1(), persistentVolume)
}
func createPersistentVolume(client corev1Typed.CoreV1Interface, persistentVolume *corev1.PersistentVolume) error {
_, err := client.PersistentVolumes().Create(context.TODO(), persistentVolume, metav1.CreateOptions{})
if k8serrors.IsAlreadyExists(err) {
glog.V(5).Info(fmt.Sprintf("persistent volume %s already created", persistentVolume.Name))
} else if err != nil {
return fmt.Errorf("failed to create persistent volume: %w", err)
}
return nil
}
// DeletePersistentVolume deletes a persistent volume.
func DeletePersistentVolume(persistentVolume string, timeout time.Duration) error {
return deletePersistentVolume(GetAPIClient().K8sClient.CoreV1(), persistentVolume, timeout)
}
func deletePersistentVolume(client corev1Typed.CoreV1Interface, persistentVolume string, timeout time.Duration) error {
err := client.PersistentVolumes().Delete(context.TODO(), persistentVolume, metav1.DeleteOptions{
GracePeriodSeconds: ptr.To[int64](0),
})
if k8serrors.IsNotFound(err) {
glog.V(5).Info(fmt.Sprintf("persistent volume %s does not exist", persistentVolume))
return nil
} else if err != nil {
return fmt.Errorf("failed to delete persistent volume %w", err)
}
Eventually(func() bool {
// if the pv was deleted, we will get an error.
_, err := client.PersistentVolumes().Get(context.TODO(), persistentVolume, metav1.GetOptions{})
return err != nil
}, timeout, retryInterval*time.Second).Should(Equal(true), "PV is not removed yet.")
return nil
}
func CreateAndWaitUntilPVCIsBound(pvc *corev1.PersistentVolumeClaim, timeout time.Duration, pvName string) error {
return createAndWaitUntilPVCIsBound(GetAPIClient().K8sClient.CoreV1(), pvc, timeout, pvName)
}
func createAndWaitUntilPVCIsBound(client corev1Typed.CoreV1Interface, pvc *corev1.PersistentVolumeClaim,
timeout time.Duration, pvName string) error {
pvc, err := client.PersistentVolumeClaims(pvc.Namespace).Create(context.TODO(), pvc, metav1.CreateOptions{})
if k8serrors.IsAlreadyExists(err) {
glog.V(5).Info(fmt.Sprintf("persistent volume claim %s already created", pvc.Name))
} else if err != nil {
return fmt.Errorf("failed to create persistent volume claim: %w", err)
}
Eventually(func() bool {
status, err := isPvcBound(client, pvc.Name, pvc.Namespace, pvName)
if err != nil {
glog.V(5).Info(fmt.Sprintf(
"pvc %s is not bound, retry in %d seconds", pvc.Name, retryInterval))
return false
}
return status
}, timeout, retryInterval*time.Second).Should(Equal(true), "pvc is not bound")
return nil
}
func isPvcBound(client corev1Typed.CoreV1Interface, pvcName string, namespace string, pvName string) (bool, error) {
pvc, err := client.PersistentVolumeClaims(namespace).Get(context.TODO(), pvcName, metav1.GetOptions{})
if err != nil {
return false, err
}
return pvc.Status.Phase == corev1.ClaimBound && pvc.Spec.VolumeName == pvName, nil
}
func DeletePersistentVolumeClaim(pvc *corev1.PersistentVolumeClaim) error {
return deletePersistentVolumeClaim(GetAPIClient().K8sClient.CoreV1(), pvc)
}
func deletePersistentVolumeClaim(client corev1Typed.CoreV1Interface, pvc *corev1.PersistentVolumeClaim) error {
err := client.PersistentVolumeClaims(pvc.Namespace).Delete(context.TODO(), pvc.Name, metav1.DeleteOptions{
GracePeriodSeconds: ptr.To[int64](0),
})
if k8serrors.IsNotFound(err) {
glog.V(5).Info(fmt.Sprintf("persistent volume claim %s does not exist", pvc.Name))
return nil
} else if err != nil {
return fmt.Errorf("failed to delete persistent volume claim %w", err)
}
return nil
}