You can use the Amazon Elastic Block Store (Amazon EBS) direct APIs to create Amazon EBS snapshots, write data directly to your snapshots, read data on your snapshots, and identify the differences or changes between two snapshots. If you’re an independent software vendor (ISV) who offers backup services for Amazon EBS, the EBS direct APIs make it more efficient and cost-effective to track incremental changes on your Amazon EBS volumes through snapshots. This can be done without having to create new volumes from snapshots, and then use Amazon Elastic Compute Cloud (Amazon EC2) instances to compare the differences.
You can create incremental snapshots directly from data on-premises into volumes and the cloud to use for quick disaster recovery. With the ability to write and read snapshots, you can write your on-premises data to an snapshot during a disaster. Then after recovery, you can restore it back to Amazon Web Services or on-premises from the snapshot. You no longer need to build and maintain complex mechanisms to copy data to and from Amazon EBS.
This API reference provides detailed information about the actions, data types, parameters, and errors of the EBS direct APIs. For more information about the elements that make up the EBS direct APIs, and examples of how to use them effectively, see Accessing the Contents of an Amazon EBS Snapshot in the Amazon Elastic Compute Cloud User Guide. For more information about the supported Amazon Web Services Regions, endpoints, and service quotas for the EBS direct APIs, see Amazon Elastic Block Store Endpoints and Quotas in the Amazon Web Services General Reference.
## Installing To install the this package, simply type add or install @aws-sdk/client-ebs using your favorite package manager: - `npm install @aws-sdk/client-ebs` - `yarn add @aws-sdk/client-ebs` - `pnpm add @aws-sdk/client-ebs` ## Getting Started ### Import The AWS SDK is modulized by clients and commands. To send a request, you only need to import the `EBSClient` and the commands you need, for example `CompleteSnapshotCommand`: ```js // ES5 example const { EBSClient, CompleteSnapshotCommand } = require("@aws-sdk/client-ebs"); ``` ```ts // ES6+ example import { EBSClient, CompleteSnapshotCommand } from "@aws-sdk/client-ebs"; ``` ### Usage To send a request, you: - Initiate client with configuration (e.g. credentials, region). - Initiate command with input parameters. - Call `send` operation on client with command object as input. - If you are using a custom http handler, you may call `destroy()` to close open connections. ```js // a client can be shared by different commands. const client = new EBSClient({ region: "REGION" }); const params = { /** input parameters */ }; const command = new CompleteSnapshotCommand(params); ``` #### Async/await We recommend using [await](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/await) operator to wait for the promise returned by send operation as follows: ```js // async/await. try { const data = await client.send(command); // process data. } catch (error) { // error handling. } finally { // finally. } ``` Async-await is clean, concise, intuitive, easy to debug and has better error handling as compared to using Promise chains or callbacks. #### Promises You can also use [Promise chaining](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_promises#chaining) to execute send operation. ```js client.send(command).then( (data) => { // process data. }, (error) => { // error handling. } ); ``` Promises can also be called using `.catch()` and `.finally()` as follows: ```js client .send(command) .then((data) => { // process data. }) .catch((error) => { // error handling. }) .finally(() => { // finally. }); ``` #### Callbacks We do not recommend using callbacks because of [callback hell](http://callbackhell.com/), but they are supported by the send operation. ```js // callbacks. client.send(command, (err, data) => { // process err and data. }); ``` #### v2 compatible style The client can also send requests using v2 compatible style. However, it results in a bigger bundle size and may be dropped in next major version. More details in the blog post on [modular packages in AWS SDK for JavaScript](https://aws.amazon.com/blogs/developer/modular-packages-in-aws-sdk-for-javascript/) ```ts import * as AWS from "@aws-sdk/client-ebs"; const client = new AWS.EBS({ region: "REGION" }); // async/await. try { const data = await client.completeSnapshot(params); // process data. } catch (error) { // error handling. } // Promises. client .completeSnapshot(params) .then((data) => { // process data. }) .catch((error) => { // error handling. }); // callbacks. client.completeSnapshot(params, (err, data) => { // process err and data. }); ``` ### Troubleshooting When the service returns an exception, the error will include the exception information, as well as response metadata (e.g. request id). ```js try { const data = await client.send(command); // process data. } catch (error) { const { requestId, cfId, extendedRequestId } = error.$$metadata; console.log({ requestId, cfId, extendedRequestId }); /** * The keys within exceptions are also parsed. * You can access them by specifying exception names: * if (error.name === 'SomeServiceException') { * const value = error.specialKeyInException; * } */ } ``` ## Getting Help Please use these community resources for getting help. We use the GitHub issues for tracking bugs and feature requests, but have limited bandwidth to address them. - Visit [Developer Guide](https://docs.aws.amazon.com/sdk-for-javascript/v3/developer-guide/welcome.html) or [API Reference](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/index.html). - Check out the blog posts tagged with [`aws-sdk-js`](https://aws.amazon.com/blogs/developer/tag/aws-sdk-js/) on AWS Developer Blog. - Ask a question on [StackOverflow](https://stackoverflow.com/questions/tagged/aws-sdk-js) and tag it with `aws-sdk-js`. - Join the AWS JavaScript community on [gitter](https://gitter.im/aws/aws-sdk-js-v3). - If it turns out that you may have found a bug, please [open an issue](https://github.com/aws/aws-sdk-js-v3/issues/new/choose). To test your universal JavaScript code in Node.js, browser and react-native environments, visit our [code samples repo](https://github.com/aws-samples/aws-sdk-js-tests). ## Contributing This client code is generated automatically. Any modifications will be overwritten the next time the `@aws-sdk/client-ebs` package is updated. To contribute to client you can check our [generate clients scripts](https://github.com/aws/aws-sdk-js-v3/tree/main/scripts/generate-clients). ## License This SDK is distributed under the [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0), see LICENSE for more information. ## Client Commands (Operations List)