cloud: add private link connection docs

[shiyuhang0]

First-time contributors' checklist

• I've signed the Contributor License Agreement, which is required for the repository owners to accept my contribution.

What is changed, added or deleted? (Required)

Which TiDB version(s) do your changes apply to? (Required)

Tips for choosing the affected version(s):

By default, CHOOSE MASTER ONLY so your changes will be applied to the next TiDB major or minor releases. If your PR involves a product feature behavior change or a compatibility change, CHOOSE THE AFFECTED RELEASE BRANCH(ES) AND MASTER.

For details, see tips for choosing the affected versions.

• master (the latest development version)
• v9.0 (TiDB 9.0 versions)
• v8.5 (TiDB 8.5 versions)
• v8.1 (TiDB 8.1 versions)
• v7.5 (TiDB 7.5 versions)
• v7.1 (TiDB 7.1 versions)
• v6.5 (TiDB 6.5 versions)
• v6.1 (TiDB 6.1 versions)
• v5.4 (TiDB 5.4 versions)

What is the related PR or file link(s)?

• This PR is translated from:
• Other reference link(s):

Do your changes match any of the following descriptions?

• Delete files
• Change aliases
• Need modification after applied to another branch
• Might cause conflicts after applied to another branch

[gemini-code-assist]

Summary of Changes

Hello @shiyuhang0, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a suite of new documentation focused on establishing secure and efficient Private Link connections for TiDB Cloud's dataflow services. These guides provide detailed, step-by-step instructions for connecting TiDB Cloud to various external data sources, including AWS RDS, Alibaba Cloud RDS, AWS Confluent Dedicated clusters, and self-hosted Kafka clusters on AWS, all leveraging cloud-native private link services. The aim is to facilitate private, direct, and secure data transmission, improving both security posture and network performance for users integrating TiDB Cloud with their existing cloud infrastructure.

Highlights

• New Private Link Connection Documentation: Introduced a comprehensive set of documentation for establishing Private Link connections from TiDB Cloud to various external data sources.
• Support for AWS RDS and Alibaba Cloud RDS: Added detailed guides for setting up secure Private Link connections to both AWS RDS and Alibaba Cloud RDS instances.
• Integration with AWS Confluent and Self-Hosted Kafka: Provided new documentation for connecting TiDB Cloud to AWS Confluent Dedicated clusters and self-hosted Kafka clusters on AWS via Private Link.
• Overview and Management of Private Link Connections: Included an overview document explaining the Private Link Connection for Dataflow feature, its types, domain attachment, and general management steps via Console and CLI.

Using Gemini Code Assist

The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.

Invoking Gemini

You can request assistance from Gemini at any point by creating a comment using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands on the current page.

Feature	Command	Description
Code Review	/gemini review	Performs a code review for the current pull request in its current state.
Pull Request Summary	/gemini summary	Provides a summary of the current pull request in its current state.
Comment	@gemini-code-assist	Responds in comments when explicitly tagged, both in pull request comments and review comments.
Help	/gemini help	Displays a list of available commands.

Customization

To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.

Limitations & Feedback

Gemini Code Assist may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments. If you're interested in giving your feedback about your experience with Gemini Code Assist for Github and other Google products, sign up here.

You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.

Footnotes

1. Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution. ↩

[gemini-code-assist]

Code Review

This pull request adds several new documentation pages related to setting up Private Link connections for TiDB Cloud Dataflow services. The new documents cover connections to Alibaba Cloud RDS, AWS Confluent, AWS RDS, and self-hosted Kafka on AWS, along with a general overview page. My review focuses on improving clarity, correcting grammatical errors and typos, and ensuring consistency with the repository's style guide. I've provided suggestions to improve sentence structure, use consistent terminology, and fix formatting for better readability.

[gemini-code-assist]

Warning

Gemini encountered an error creating the review. You can try again by commenting /gemini review.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please ask for approval from hfxsd. For more information see the Code Review Process.
Please ensure that each of them provides their approval before proceeding.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[qiancai]

Suggested change

	4. Enter the required information in the **Create Private Link Connection** dialog:
	4. In the **Create Private Link Connection** dialog, enter the required information:

[qiancai]

Suggested change

	4. Enter the required information in the **Create Private Link Connection** dialog:
	4. In the **Create Private Link Connection** dialog, enter the required information:

[qiancai]

Suggested change

	```shell
	ticloud serverless private-link-connection create -c <cluster-id> --display-name <display-name> --type AWS_ENDPOINT_SERVICE --aws.endpoint-service-name <endpoint-service-name>
	```
	To create a private link connection using the TiDB Cloud CLI:
	1. Run the following command:
	```shell
	ticloud serverless private-link-connection create -c <cluster-id> --display-name <display-name> --type AWS_ENDPOINT_SERVICE --aws.endpoint-service-name <endpoint-service-name>
	```

[shiyuhang0]

@qiancai a new commit has been pushed to add the step of create dedicated cluster. PTAL again
bf32079

[qiancai]

Suggested change

	Please create a Confluent Cloud Dedicated cluster under the network you set up in [Step 1](#step-1-set-up-a-confluent-cloud-network). For more information, see [Create a dedicated cluster in Confluent Cloud](https://docs.confluent.io/cloud/current/clusters/create-cluster.html#create-ak-clusters).
	When creating the cluster, use existing Confluent Cloud network you set up in [Step 1](#step-1-set-up-a-confluent-cloud-network).
	Create a Confluent Cloud Dedicated cluster under the network you set up in [Step 1](#step-1-set-up-a-confluent-cloud-network). For more information, see [Create a dedicated cluster in Confluent Cloud](https://docs.confluent.io/cloud/current/clusters/create-cluster.html#create-ak-clusters).

[ti-chi-bot]

@shiyuhang0: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-verify	83d4ac4	link	true	/test pull-verify

Full PR test history. Your PR dashboard.

Details

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.