Adding a Cluster

eReplication needs to perform data protection and DR tasks for applications provided by Kubernetes. Therefore, you need to add Kubernetes clusters before creating protected groups.

Prerequisites

The Kubernetes to be discovered is running properly.
A site has been created.
When resources are added to a Kubernetes cluster, server in the YAML configuration file cannot be set to a domain name. If server is set to a domain name, subsequent functions will be affected.
The Kubernetes cluster to be added has not been added to other sites.

Table 1 describes the application scenarios of adding a cluster.

**Table 1** Application scenarios for adding a cluster
Protected Object	Description
Kubernetes	In backup and DR scenarios, the following types of applications can be protected: Pod, Deployment, Service, ReplicaSet, DaemonSet, and StatefulSet In DR scenarios, data volumes can also be protected.

Ensure that the time of the Kubernetes cluster is the same as that of eReplication.

Context

A Kubernetes cluster can be added to only one site of eReplication.

Procedure

On the menu bar, click Resources.
On the navigation bar, select the site where the cluster is to be added.
Click Add Kubernetes Container.
- Method 1: In the Resource Statistics area, click Add Kubernetes Container.
- Method 2: In the navigation pane, choose kubernetes and click Add Cluster.

Upload the DR Admin configuration file.

The DR Admin configuration file is the kubeconfig authentication file exported from the Kubernetes cluster. It is used by the DR system to interconnect with the Kubernetes cluster for DR management.

If the DR Admin configuration file uses the kubeconfig authentication file of a customized user, the user permission must meet Table 2.

**Table 2** Minimum permission set for customized users
API Provider	API Groups	Kind	Permission
CDR	xuanwu.huawei.io	Backup	get,list,delete
CDR	xuanwu.huawei.io	Hook	get,list
CDR	xuanwu.huawei.io	ResourceDetail	get,list
CDR	xuanwu.huawei.io	BackupJob	get,list,create,patch
CDR	xuanwu.huawei.io	RecoveryJob	get,list,create,patch
CDR	xuanwu.huawei.io	RestoreJob	get,list,create,patch
CDR	xuanwu.huawei.io	ProtectionJob	get,list,create,patch
CDR	xuanwu.huawei.io	ReProtectionJob	get,list,create,patch
CDR	xuanwu.huawei.io	Cluster	get,list,create,delete
CDR	xuanwu.huawei.io	BackupInstance	get,list,create,delete,update
CDR	xuanwu.huawei.io	BackupLocation	get,list,create,delete,update
CDR	xuanwu.huawei.io	BackupSchedule	get,list
CDR	xuanwu.huawei.io	ProtectionPlan	get,list,create,delete,update,patch
CDR	xuanwu.huawei.io	RecoveryPlan	get,list,create,delete,update,patch
CDR	xuanwu.huawei.io	ResourceSet	get,list,create,delete,update,patch
CDR	xuanwu.huawei.io	SchedulePolicy	get,list,create,delete,update
CDR	xuanwu.huawei.io	VolumeSet	get,list,create,delete,update
CSI	xuanwu.huawei.io	StorageBackendClaim	get,list,create,delete,update
CSI	xuanwu.huawei.io	StorageBackendContent	get,list,create,delete,update
Kubernetes	-	Event	get,list
Kubernetes	-	Namespace	get,list,create,delete
Kubernetes	storage.k8s.io	StorageClass	get,list,create,delete,update
Kubernetes	-	PersistentVolume	get,list,create,delete,update
Kubernetes	-	PersistentVolumeClaim	get,list,create,delete,update
Kubernetes	-	Service	get,list,delete
Kubernetes	-	ConfigMap	get,list,delete
Kubernetes	-	Secret	get,list,delete
Kubernetes	-	ServiceAccount	get,list,delete
Kubernetes	rbac.authorization.k8s.io	ClusterRole	get,list,delete
Kubernetes	rbac.authorization.k8s.io	ClusterRoleBinding	get,list,delete
Kubernetes	-	Pod	get,list,delete,update,patch
Kubernetes	apps	Deployment	get,list,create,delete,update,patch
Kubernetes	apps	ReplicaSet	get,list,delete,update,patch
Kubernetes	apps	DaemonSet	get,list,delete,update,patch
Kubernetes	apps	StatefulSet	get,list,delete,update,patch
Kubernetes	extensions	Deployment	get,list,create,delete,update,patch
Kubernetes	extensions	DaemonSet	get,list,create,delete,update,patch
Kubernetes	extensions	ReplicaSet	get,list,delete,update,patch

Click OK.

Related Operations

After a cluster is added, you can view, refresh, modify, and delete the cluster information. Table 3 describes the related operations.

**Table 3** Related operations
Operation	Method	Prerequisite and Result
View	View the cluster information in the cluster list. Filter clusters by Status and view cluster information. Enter a keyword in the Cluster Name, Server IP Address, or User Name column to view the cluster information.	-
Refresh	Locate the row that contains the target cluster and click Refresh in the Operation area.	For clusters that have been added to a site, eReplication automatically queries cluster information at an interval of 30 minutes to ensure that the cluster information in eReplication is the same as the actual cluster information. After the cluster information is changed, this operation enables you to manually update the cluster information immediately.
Modify	Locate the row that contains the target cluster, and choose More > Modify in the Operation area.	This operation enables you to upload the DR Admin configuration file and update the DR Admin configuration file information of the cluster.
Delete	Locate the row that contains the target cluster, and choose More > Delete in the Operation area.	This operation enables you to delete unnecessary clusters from a site. NOTE: This operation will delete the selected Kubernetes from the system and cannot be undone. Check whether the selected Kubernetes is correct.