Detect hosts
Perform this task to detect hosts installed with UIS Manager and add them to a cluster deployed in the system.
The system supports the following scanning modes:
MAC address scanning—UIS Manager scans hosts based on Layer 2 protocols and can discover all hosts that are in the same VLAN as the management network physical interfaces of UIS Manager.
IP address scanning—UIS Manager scans hosts by their IP addresses. You can enter multiple discrete IP addresses or IP address ranges. Then, the system can detect all online hosts based on these IP addresses and IP address ranges. In this mode, the management network settings that you configured during network planning do not take effect, because the system configures host names and network settings for the detected hosts through SSH.
During the joining process of a host, UIS Manager will deploy initial settings such as physical NIC IP, subnet mast, LAGG settings, and load balancing modes, to the host. If the host fails to join UIS Manager, and the scanning mode is MAC address scanning, the system will set the management IP and subnet mask of the host to 192.168.0.162 and 255.255.255.0, respectively.
Restrictions and guidelines
After you change the scanning mode, the system will re-detect hosts and refresh the host list.
Make sure the UIS software version of the hosts is the same as UIS Manager.
Make sure the number of NIC physical interfaces and reuse settings of the management, service, storage front-end, and storage back-end networks on the hosts are the same as those configured on the UIS Setup Wizard.
For example, if the network settings of UIS are as follows:
Management and service—Physical interfaces eth0 and eth1, static link aggregation mode. The management network uses VLAN 10.
Storage front-end and storage back-end—Physical interfaces eth2 and eth3 in VLAN 12, dynamic link aggregation mode. The storage back-end and front-end networks use VLAN 12 and VLAN 13, respectively.
The host and the connected switch settings must be the following:
Management and service networks—Trunk type, permitting VLAN 10 and the service VLAN, sharing two physical interfaces.
Storage front-end and back-end networks—Trunk type, permitting VLANs 12 and 13, sharing two physical interfaces.
If you add a host to the cluster only as a compute host, the host provides only compute services and does not require UIS-ONEStor licensing. If you add a host to the cluster only as a storage host, the host provides only storage services, cannot be added to a shared storage pool, and does not require UIS-CAS licensing.
A host that acts as a compute or storage host only cannot be used as the backup management node for management HA.
You can assign only a disk that is not partitioned as a cache or data disk. If a disk is partitioned, you can click Scan Disk Partition to scan and clear that disk.
Select a scanning mode
You can perform this task only when the system has multiple clusters.
To select a scanning mode:
On the top navigation bar, click Hosts.
Select a cluster from the left navigation pane.
Click Detect Hosts.
Click Scan for Hosts.
Select a scanning mode, and then click OK.
Add hosts to a cluster
On the top navigation bar, click Hosts. If the system has multiple clusters, select a cluster from the left navigation pane.
Click Detect Hosts.
Click the Scan icon
.
Select one or more hosts, click the
icon, and then configure network settings for the hosts as planned on the initialization page.
Click OK, and then click Add to Cluster.
Assign host disks to a disk pool, and then click Next.
Configure host role and rack settings:
Click the Hosts tab, and then click the
icon for a host to edit the host role.
Select a rack for each host. If no rack is available, first click Configure Rack to add racks.
Click Finish.
Parameters
NIC Template: After you enable this feature for a host, the system automatically configures network settings based on those of the host for other hosts that meet the following requirements:
Have physical NICs with the same names as those of the host, and the physical NICs are active.
The physical NICs meet the minimum rate requirements of corresponding networks.
Assume that you enable this feature for Host A, which uses eth0 as the management network NIC, eth1 as the service network NIC, and eth2 and eth3 as the storage network NICs. The system automatically configures network settings for a host only when the host meets the following requirements:
Has physical NICs eth0, eth1, eth2, and eth3, and the physical NICs are active.
The rate of eth0 and eth1 is not lower than 1000 Mbps.
The rate of eth2 and eth3 is not lower than 10000 Mbps.
Compute Host Only: To add a host to the cluster only as a compute host, select On for this parameter.
Storage Host Only: To add a host to the cluster only as a storage host, select On for this parameter.
IP Addresses: If you do not configure IP addresses for the hosts, the system automatically assigns IP addresses to the hosts in sequence. You do not need to configure a service network IP address for a host.
Physical Interfaces: Specify physical NICs for the management, storage back-end, and storage front-end networks. The service network NIC is optional. If you do not specify a service network NIC, the system does not create a service network vSwitch for the host after the host joins the cluster. In this case, you must manually configure a service network vSwitch for the host.
LAGG Mode: Select a link aggregation mode for the physical NICs. Options include Static and Dynamic. As a best practice, use dynamic link aggregation mode. If you select the dynamic link aggregation mode, you must enable LACP on the physical switch. This parameter is available only when you select multiple physical interfaces.
LB Mode: Select the load balancing mode for physical NICs. This parameter is available only when you select multiple physical interfaces.
Advanced—Balances load based on Ethernet type, IP protocol, source IP address, destination IP address, source port, and destination port of the packets. As a best practice, use advanced load balancing mode in an environment that requires precise load balancing.
Basic—Balances load based on the source MAC address and VLAN tag of the packets. As a best practice, use this mode to increase the network bandwidth and reduce the single-NIC load.
Primary/Backup—Balances load based on the primary and backup physical NICs. When the primary NIC fails, the system automatically switches the traffic to the backup NIC. This option is available only when the link aggregation mode is Static. You do not configure link aggregation on the peer switch.
Host Role: Edit the role of a host. A host can act as a storage node, or both. A host added to the distributed storage cluster is a storage node by default.