This topic describes how to purchase an OpenSearch Retrieval Engine Edition instance.
Prerequisites
Before you begin, ensure that you have:
An Alibaba Cloud account with real-name verification complete
An AccessKey pair created for your Alibaba Cloud account. The system prompts you to create one when you first log on to the console.
An AccessKey pair is required to create and use an OpenSearch instance.
(Optional) A Resource Access Management (RAM) user with the required permissions, if you prefer not to use your root account. For details, see Create a RAM user and grant permissions to the RAM user.
A virtual private cloud (VPC) created in the same region as your Elastic Compute Service (ECS) instance. The OpenSearch instance must share the same VPC and vSwitch as the ECS instance you use to access it. A mismatch returns a 403 Forbidden error.
To access an OpenSearch Retrieval Engine Edition instance as a RAM user, attach the AliyunSearchEngineFullAccess or AliyunSearchEngineReadOnlyAccess policy to the RAM user using your Alibaba Cloud account.
Purchase an instance
Log on to the OpenSearch console. In the upper-left corner, switch to OpenSearch Retrieval Engine Edition.
In the left-side navigation pane, click Instances. On the Instances page, click Create Instance.
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On the purchase page, configure the following settings:
Product Edition: Select OpenSearch Retrieval Engine Edition.
Engine Type, Product Type, and Region: Select values matching your deployment target.
Searcher worker configuration: Set Number of Searcher Workers, Searcher Worker Spec Family, Searcher Worker Spec, and Total Storage Space per Searcher Worker based on your data volume and query performance requirements.
QRS worker configuration: Set Number of QRS Workers, QRS Worker Spec Family, and QRS Worker Spec based on your query concurrency requirements.
VPC and vSwitch: Select the same VPC and vSwitch as your ECS instance. A mismatch causes a 403 Forbidden error.
Query authentication: Set a username and password for query authentication. These credentials are separate from your Alibaba Cloud account credentials.
After you complete the configuration, click Buy Now. The actual fee is calculated and shown on the buy page based on the specs you select.
Size your Searcher and Query Result Searcher (QRS) workers based on your expected data volume, index size, and query concurrency.
The VPC and vSwitch must match those of the ECS instance you use to access OpenSearch. If they do not match, the error
{'errors':{'code':'403','message':'Forbidden'}}is returned.-
Storage space per Searcher worker:
Searcher workers that use cloud disks do not include a free storage quota.
Searcher workers that use SSDs include a free storage quota. Additional storage can be purchased in 50 GB increments, and you are charged only for storage beyond the free quota.
On the Confirm Order page, review your order, accept the terms of service, and click Activate Now.
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After the purchase completes, click Console. On the Instances page, your new instance appears with a provisioning status. Provisioning typically takes 1 to 5 minutes.
Wait until the status changes before you configure or test the instance.
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The instance name is assigned automatically. To rename it, click Manage in the Actions column to open the instance details page.
In the Basic Information section, click the edit icon next to the instance name, enter a new name, and click Confirm.
You can rename the instance at any time from this page.
What's next
After the instance is provisioned, complete the following steps:
Configure and test: Follow the Getting started guide to connect to the instance, push data, and run a test query.
Verify network connectivity: Confirm that your ECS instance can reach OpenSearch on the correct VPC and vSwitch before sending production traffic.
Set up RAM access: If multiple team members or services need access, create RAM users with appropriate policies (AliyunSearchEngineFullAccess or AliyunSearchEngineReadOnlyAccess) rather than sharing root account credentials.