Add a DRX service

  1. On the top navigation bar, click Services.

  1. Click Add DRX Service.

  1. Configure the DRX service parameters as needed. You can bind a load balancer later.

 

Description

Description

Cluster

Select a cluster for the DRX service.

Storage

Specify a shared storage pool for automatically created VMs.

VMs

Specify the maximum number of VMs supported by the DRX service. It is the maximum number of VMs allowed in a VM group.

Effective

Select the way in which a DRX service takes effect. Options include Now, Custom, and No.

  • Now—The DRX service takes effect immediately after it is created.

  • Custom—The DRX service takes effect in the specified time range.

  • No—The DRX service does not take effect.

Start Time

Specify the start time when the DRX service takes effect. This field is required if you select Custom from the Effective list. If you set only the start time, the DRX service is always effective from this time.

End Time

Specify the end time when the DRX service takes effect. This field is required if you select Custom from the Effective list. If you set only the end time, the DRX service is effective from the current time to the end time.

Bind Load Balancer

Configure whether to bind a load balancer to the DRX service.

 

  1. Click Next, and then set the duration and detection interval.

 

Parameter

Description

Duration

Specify the time during which the average CPU usage and memory usage and the number of connections of the VMs in a VM group cross the thresholds multiple times in an extension monitoring policy, or drop below the thresholds multiple times in a reclaim monitoring policy.

Detection Interval

Specify the interval at which the CPU usage, memory usage, and connections of VMs in a VM group are detected.

 

  1. Click Resource Import Settings, and then click the Edit icon  to edit the settings as needed.

 

Parameter

Description

Resource Import Settings

When the average CPU usage, average memory usage, connection number, network traffic, disk I/O, and IOPS of the VMs in a VM group cross the thresholds multiple times in an extension monitoring policy, VMs are automatically created in the VM group.

Import Mode

Select the mode in which a VM is created in the VM group corresponding to the DRX service. Options include Fast Deployment and Fast Clone.

  • Fast Deployment—VMs are created in a VM group through the selected VM template.

  • Fast Clone—VMs are created in a VM group through selecting VMs to be cloned.

VMs to Create

Specify the number of VMs to be created for one DRX task.

 

  1. Click Resource Reclaim Settings, click the Edit icon  to configure the settings as needed, and then click Next.

 

Parameter

Description

Resource Reclaim Settings

When the average CPU usage, average memory usage, connection number, network traffic, disk I/O, and IOPS of the VMs in a VM group drop below the thresholds multiple times in a resource reclaim monitoring policy, VMs in the VM group are automatically reclaimed.

Reclaim Type

Select a reclaim type. Options include Reclaim Now and Slow-Offline.

  • Reclaim Now—A VM is reclaimed as long as the reclamation conditions are met.

  • Slow-Offline—When the reclamation conditions are met, the system prevents a VM from receiving TCP packets and identifies whether the number of packets sent by the VM is smaller than the threshold every 10 seconds. If the number is smaller than the threshold, the system reclaims the VM immediately. If the number is not smaller than the threshold, the system does not reclaim the VM until the number is smaller than the threshold or until the timeout is reached.

Threshold

Specify the maximum number of packets sent by a VM that can trigger slow-offline VM reclamation. This field is required only when you select Slow-Offline as the reclamation type.

Timeout

Specify the timeout that can trigger slow-offline VM reclamation. This field is required only when you select Slow-Offline as the reclamation type.

Reclaim Mode

Select the mode in which a VM is reclaimed. Options include Shut Down VM, Delete VM, and Put VM to Sleep.

  • Shut Down VM—Powers off a VM.

  • Delete VM—Deletes a VM.

  • Put VM to Sleep—Hibernates a VM.

Min. Running VMs

Specify the minimum number of VMs that must be in running state in a resource reclamation task.

 

  1. Add VMs that run the same service to a VM group, and configure whether to automatically reclaim the VMs as needed by clicking the  or  icon.  indicates to reclaim VMs automatically, and  indicates to not automatically reclaim VMs.

 

  1. Click Next, configure the extension settings as needed, and then click Finish.

 

Parameter

Description

VM Template

Select a VM template for fast deployment. This parameter is required only when you select Fast Deployment as the resource import type.

VM to Clone

Select the VM to clone. This parameter is required only when you select Fast Clone as the resource import type. You can select a VM to clone only from the selected VM group and the VM must meet the following requirements:

  • The image file is in the shared storage pool.

  • No USB, PCI, SR-IOV, or TPM devices exist on the VM.

  • The VM is not bound to any NUMA node or physical CPU.

  • The storage type of the VM is intelligent.

VM Prefix

Enter the prefix of the VM to be created in a VM group.

Start Number

Enter the start number of the VM. This number is displayed after the VM prefix. The number increases as the number of created VMs increases until the maximum number is reached.

Start IP

Start IP address of the VM.

End IP

End IP address of the VM. Reserve sufficient IP addresses for address allocation when setting the start and end IP addresses.