Creating a DR ECS (Deprecated)

Scenarios

Before you create an EVS replication pair, create a DR ECS in the secondary AZ for the production ECS. The DR ECS parameters must be consistent with those of the production ECS. The parameters include the ECS specifications and the parameters of the production ECS's EVS disks, subnet, and security group.

If a large number of physical resources in the primary AZ are faulty due to force majeure, you can attach DR disks in the secondary AZ to DR ECSs and use DR disks to ensure the service availability and continuity.

Procedure

1. Log in to the management console.
2. Click in the upper left corner and select the desired region and project.
3. Under Computing, click Elastic Cloud Server.

   The Elastic Cloud Server page is displayed.

4. Click the name of the production ECS.

   The ECS details page is displayed.

5. Take note of the production ECS information, including the ECS specifications, details of the EVS disks attached to the ECS, private IP address, and security group, as shown in Table 1.
   

   The listed parameter values are for reference only.

   Table 1 Information to be collected

   Production Resource	Parameter	Example Value
   ECS	VPC	vpc-001
   	ECS type	General-purpose
   	Specification	s2.xlarge.2
   	vCPU	4 cores
   	Memory	8 GB
   	Image	CentOS 7.2 64bit
   	AZ	AZ1
   EVS disk	Quantity	System disk: 1 Data disk: 1
   	Capacity	System disk: 500 GB Data disk: 2000 GB
   	Disk type	System disk: common I/O Data disk: ultra-high I/O
   	Disk sharing	System disk: non-shared disk Data disk: non-shared disk
   	Device type	System disk: VBD Data disk: SCSI
   Others	Private IP address	192.168.12.2
   	Security group	Sys-default
   	Virtual IP address	192.168.12.23

6. Create the DR ECS using the information of the production ECS.

   For details, see Creating an ECS in the Elastic Cloud Server User Guide.

   

   Check the parameter values carefully and ensure that information of the DR ECS and production ECS is consistent.

7. After the DR ECS has been created, locate the DR ECS and stop it.

   Stopping the DR ECS prevents it from being incorrectly used.

   

   When the DR ECS is not stopped and its system disk is used to create an EVS replication pair, the DR ECS status will change to REBUILDING. In this state, you cannot stop the DR ECS, detach EVS disks from it, or expand its EVS disks.