This topic describes how to enable SSL encryption for an instance to enhance link security. After you enable SSL encryption, you must install SSL certificates that are issued by certificate authorities (CAs) on your application. The SSL encryption feature encrypts network connections at the transport layer to improve data security and ensure data integrity during communication.
Prerequisites
The instance is deployed in classic mode.
The instance runs Redis 4.0 or 5.0.
The instance uses the cluster architecture.
Precautions
Tair (Redis OSS-compatible) upgrades SSL encryption to Transport Layer Security (TLS) encryption. Starting April 7, 2023, you cannot enable SSL encryption for your instance. If you have enabled SSL encryption for your instance, you can disable SSL encryption or continue to use SSL encryption. After you disable SSL for your instance, you can no longer enable SSL encryption for the instance. For more information, see Notice on encryption upgrade from SSL to TLS.
An SSL certificate remains valid for three years. Before the used SSL certificate expires, you must update its validity period. In addition, you must download the required SSL certificate file and configure the certificate again. Otherwise, clients cannot connect to your instance over an encrypted connection.
SSL encryption may cause higher network latency for Tair and Redis Open-Source Edition instances. Therefore, we recommend that you enable this feature only when encryption is needed. For example, if you connect to an instance over the Internet, you can enable SSL encryption for the instance.
After you enable SSL encryption for an instance, both SSL and non-SSL connections are supported.
Procedure
Log on to the 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 left-side navigation pane, click TLS Settings (SSL).
Perform one of the following operations based on your business needs.
Operation
Description
Enable or disable SSL encryption
Turn on or off SSL Certificate Information.
Renew the CA certificate
Click Update Certificate in the upper-right corner and then click OK.
The CA certificate remains valid for three years. You can click Update Certificate and then download and configure the CA certificate again. After the CA certificate is renewed, it is valid for another three years.
Download the CA certificate
In the upper-right corner, click Download SSL Certificate.
WarningThe instance restarts after you enable SSL encryption or update the certificate validity period. The instance may encounter a transient connection that lasts for a few seconds. We recommend that you perform this operation during off-peak hours and make sure that your application can automatically reconnect to the instance.
FAQ
What do I do if the "version not supported" error message appears?
You must update your instance to the latest minor version. For more information, see Update the minor version of an instance.
What files are included in the downloaded CA certificate package?
The downloaded CA certificate package consists of the following files:
ApsaraDB-CA-Chain.p7b: This file is used to import the CA certificate into the Windows operating system.
ApsaraDB-CA-Chain.pem: This file is used to import the CA certificate into other operating systems such as Linux or applications.
ApsaraDB-CA-Chain.jks: This file stores truststore certificates of Java and is used to import the CA certificate chain into Java applications.
Methods to establish SSL connections
Related API operations
API operation | Description |
Configures SSL encryption for an instance. |