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Reconfiguring TLS of Redis Database

This guide will give an overview on how KubeDB Ops-manager operator reconfigures TLS configuration i.e. add TLS, remove TLS, update issuer/cluster issuer or Certificates and rotate the certificates of a Redis database.

Before You Begin

• You should be familiar with the following KubeDB concepts:
  • Redis
  • RedisSentinel
  • RedisOpsRequest

How Reconfiguring Redis TLS Configuration Process Works

The following diagram shows how KubeDB Ops-manager operator reconfigures TLS of a Redis database. Open the image in a new tab to see the enlarged version.

  

The Reconfiguring Redis/RedisSentinel TLS process consists of the following steps:

1. At first, a user creates a Redis/RedisSentinel Custom Resource (CR).

2. KubeDB Community operator watches the Redis and RedisSentinel CR.

3. When the operator finds a Redis/RedisSentinel CR, it creates required number of StatefulSets and related necessary stuff like appbinding, services, etc.

4. Then, in order to reconfigure the TLS configuration of the Redis database the user creates a RedisOpsRequest CR with the desired version.

5. Then, in order to reconfigure the TLS configuration (rotate certificate, update certificate) of the RedisSentinel database the user creates a RedisSentinelOpsRequest CR with the desired version.

6. KubeDB Enterprise operator watches the RedisOpsRequest and RedisSentinelOpsRequest CR.

7. When it finds a RedisOpsRequest CR, it halts the Redis object which is referred from the RedisOpsRequest. So, the KubeDB Community operator doesn’t perform any operations on the Redis object during the reconfiguring process.

8. When it finds a RedisSentinelOpsRequest CR, it halts the RedisSentinel object which is referred from the RedisSentinelOpsRequest. So, the KubeDB Community operator doesn’t perform any operations on the RedisSentinel object during the reconfiguring process.

9. By looking at the target version from RedisOpsRequest/RedisSentinelOpsRequest CR, KubeDB Enterprise operator will add, remove, update or rotate TLS configuration based on the Ops Request yaml.

10. After successfully reconfiguring Redis/RedisSentinel object, the KubeDB Enterprise operator resumes the Redis/RedisSentinel object so that the KubeDB Community operator can resume its usual operations.

In the next doc, we are going to show a step-by-step guide on upgrading of a Redis database using upgrade operation.