View the endpoint of a Tair instance - - Alibaba Cloud Documentation Center

Before you connect to an instance of Tair, you must obtain the endpoint of the Tair instance. The virtual IP address (VIP) of the Tair instance may change due to service maintenance or configuration change. We recommend that you connect to Tair instances by using their endpoints (such as r-2vcl6xcftp1nu7****.com) to ensure service availability. You can view different types of endpoints in the console.

Prerequisites

The IP address of your client is added to a whitelist of the Tair instance. For more information, see Configure whitelists.

Procedure

Log on to the Tair console and go to the Instances page. In the top navigation bar, select the region in which the instance that you want to manage resides. Then, find the instance and click the instance ID.
In the Connection Information section, view different types of endpoints and port numbers.
Note
- If you want to connect to the Tair instance over the Internet, apply for a public endpoint for the instance. For more information, see Apply for a public endpoint for a Tair instance.
- You cannot apply for a public endpoint for a cloud-native cluster instance that runs in direct connection mode. For more information, see View endpoints.
Then, you can connect to the Tair instance. For more information, see Use redis-cli to connect to a Tair instance.

Proxy mode and direct connection mode

Tair supports the following connection modes:

Proxy mode
Clients connect to Tair instances by using proxy nodes.
Proxy nodes are developed in-house to enable architecture changes, route commands, balance loads, perform failovers, and run in-house commands for Tair instances in proxy mode. The connection mode offers several advantages, including aggregated connections, enhanced read performance, and ease of use. This can help you design more efficient business systems. For more information, see Features of proxy nodes.
Direct connection mode
For standard master-replica instances, clients directly connect to the master nodes of the instances.
For Tair cluster instances, clients directly connect to the instances, and tasks such as load balancing are handled by the instances. This is exactly the same as the direct connection to native Redis clusters.

Supported network types and connection modes for instances of different architectures

In the following table, ️️️️️✔️ indicates that the feature is supported and ❌ indicates that the feature is not supported.

Deployment mode	Instance architecture	Connection mode	VPC	Internet
Cloud-native	Standard architecture	Direct connection mode	✔️	✔️
	Cluster architecture¹	Direct connection mode	✔️	❌
	Cluster architecture¹	Proxy mode	✔️	✔️
	Read/write splitting architecture	Proxy mode	✔️	✔️
Classic	Standard architecture	Direct connection mode	✔️	✔️
	Cluster architecture²	Proxy mode Direct connection mode	✔️	✔️
	Read/write splitting architecture	Proxy mode	✔️	✔️

Important

¹Cloud-native cluster instances support only the direct connection mode or the proxy mode.

²Classic cluster instances support both the direct connection mode and the proxy mode.

VPC and Internet

Network types supported by Tair:

VPC
A virtual private cloud (VPC) is a private network that is isolated from other networks at the network layer on top of physical-layer protocols. VPCs provide high security, reliability, flexibility, scalability, and ease of use. For more information, see What is a VPC?
Scenario: An Elastic Compute Service (ECS) instance is deployed in the same VPC as your Tair instance, and the ECS instance can connect to your Tair instance over the VPC. This achieves higher security and lower network latency.
Internet
For more information, see Apply for a public endpoint for a Tair instance.
Although you are not charged for the traffic to connect to Tair instances over the Internet, the connection may incur risks. We recommend that you use a VPC to ensure higher security.
Scenario: Your Tair instance can be connected over the Internet by using your on-premises device, an ECS instance deployed in a different VPC, or a device within a third-party cloud service.

FAQ

Why is the endpoint of an instance not displayed after I connect to the instance?

The endpoint of the Tair or instance is displayed only after you add the IP address of your client to a whitelist of the instance. For more information, see Configure whitelists.

Why am I unable to find the entry point to apply for a public endpoint for an instance?

No option is available to apply for a public endpoint due to two reasons:

If the VPC endpoint is not displayed in the Connection Information section, no whitelist is configured for the Tair instance. Configure a whitelist first. For more information, see Configure whitelists.
Public endpoints are not supported for Tair cloud-native cluster instances that run in direct connection mode. You can connect to these instances over a VPC.
Note
Check whether the instance is a cloud-native cluster instance that runs in direct connection mode. For more information, see How do I know whether an instance is a cloud-native cluster instance that runs in direct connection mode?
If the ECS instance where your application resides is not in the same VPC as the Tair instance, or if your application is not hosted on Alibaba Cloud, you can configure the cloud-native cluster instance to run in proxy mode. A cloud-native cluster instance cannot be directly switched from the direct connection mode to the proxy mode. You can use the instance restoration feature to migrate and reconfigure the setup. This involves restoring backup data from the source instance to a new instance and selecting Proxy as the connection mode. For more information, see Restore data from a backup set to a new instance.
Warning
After the new cloud-native cluster instance is created with a new connection mode, modify the connection code accordingly. Otherwise, the instance cannot be connected. Proceed with caution.

How do I know whether an instance is a cloud-native cluster instance that runs in direct connection mode?

You can log on to the Tair console and go to the Instance Information page to check whether the instance is a cluster instance deployed in cloud-native mode.

In the Connection Information section of the Instance Information page, check whether the direct connection mode is used.

You cannot apply for a public endpoint for a cloud-native cluster instance that runs in direct connection mode. In the Connection Information section, the Apply for Endpoint button corresponding to Public Access is dimmed and cannot be clicked.

How do I enable the proxy mode for an instance?

By default, read/write splitting instances and classic cluster instances come with proxy endpoints. You do not need to manually enable the proxy mode for such an instance.
When you create a cloud-native cluster instance, you can select the proxy mode or the direct connection mode. After you create the instance, you cannot switch the instance from the direct connection mode to the proxy mode or from the proxy mode to the direct connection mode.
Standard Tair or Redis instances use the master-replica architecture. A standalone instance has only one primary node. You do not need to enable the proxy mode for such an instance. Only the cluster architecture and read/write splitting architecture support the proxy mode.

连接失败怎么办？

ECS通过专有网络连接Tair和Redis，连接失败的常见解决办法请参见ECS无法连接Redis的常见问题排查。
本地设备通过公网远程连接Tair和Redis，连接失败的常见解决方法请参见本地设备通过公网无法连接Redis的常见问题排查。

Can I connect to a replica node? Why am I unable to see the endpoint of a replica node?

The replica nodes of Tair and Redis instances are designed to provide redundancy and failover support, not to serve client traffic directly. They stand by to take over in case the master node fails, ensuring high availability. Therefore, you cannot directly connect to replica nodes.

References

Methods to connect to Tair instances:
If your client fails to connect to an instance and an error is reported, you can refer to the solutions that are provided in Common errors and solutions.