can existing redis cluster be reconfigured from VNET injection to private endpoint on the fly without downtime?

Deole, Pushkar (Pushkar) 60

We have an existing cluster with redis 4 on P1 plan, with 2 shards, 13GB each.

We would be upgrading that soon to redis 6.

However we currently use VNET injection and that need to be changed to private endpoint. Can this reconfiguration be done without any downtime of redis cluster?

Should this be done after we upgrade from redis 4 to 6 or before upgrade?

GeethaThatipatri-MSFT 27,337 Reputation points Microsoft Employee

2023-03-13T14:57:02.14+00:00

@Deole, Pushkar (Pushkar) Following up to see if the below suggestion was helpful. If this answers your query, do click Accept Answer, if you have any further query do let us know.

Regards

Geetha

1 answer

GeethaThatipatri-MSFT 27,337 Reputation points Microsoft Employee

2023-03-06T20:56:00.18+00:00

Hi, @Deole, Pushkar (Pushkar) Thanks for posting your question in the Microsoft Q&A forum.

Existing VNet-injected caches cannot be directly changed to use Private Endpoints. Instead, you'll need to create new Private Endpoint caches and move your workload to them. We have some guidance here that you can refer to.

Yes, the "momentary interruption where the client connections are reset" is necessary because of the failover between primary and replica nodes. For more info please refer here

I hope this information helps, please let me know if you have any additional questions.

If your question has been answered, please click Accept answer and Yes to help others looking for answers to similar questions.

Regards

Geetha
Please sign in to rate this answer.
Deole, Pushkar (Pushkar) 60 Reputation points

2023-03-07T03:57:54.74+00:00

recently one of my colleagues added private endpoint to existing redis 6 cluster using these steps: can you confirm that these steps are valid and can they be used to change existing cluster from VNet injection to private endpoint?

https://learn.microsoft.com/en-us/azure/azure-cache-for-redis/cache-private-link#create-a-private-endpoint-with-an-existing-azure-cache-for-redis-instance

Deole, Pushkar (Pushkar) 60 Reputation points

2023-03-07T06:53:49.6133333+00:00

Hi @GeethaThatipatri-MSFT recently my colleague managed to convert existing redis 6 instance to private endpoint using these steps: pls confirm if these are valid

https://learn.microsoft.com/en-us/azure/azure-cache-for-redis/cache-private-link#create-a-private-endpoint-with-an-existing-azure-cache-for-redis-instance

GeethaThatipatri-MSFT 27,337 Reputation points Microsoft Employee

2023-03-07T15:07:18.6133333+00:00

Yes, you can follow this document, however, your original question to change the existing Vnet injection cannot be done as i mentioned you can create a new private endpoint and you can refer to the document you mentioned.

Regards

Geetha

Deole, Pushkar (Pushkar) 60 Reputation points

2023-03-08T04:29:37.7466667+00:00

@GeethaThatipatri-MSFT I am still not clear. I have redis 4 cluster with Vnet injection.

I would first upgrade that to redis 6 cluster so it would be redis 6 cluster with existing cache with vnet. Now, I want to change vnet of this existing cache on redis 6 to private endpoint.

Can i do these steps?

Note that I want to save effort to migrate existing data from redis 4 to new redis 6 cluster, and also achieve moving from vnet injection to private endpoint. Please advise how that can be achieved.

GeethaThatipatri-MSFT 27,337 Reputation points Microsoft Employee

2023-03-08T16:11:02.6766667+00:00

@Deole, Pushkar (Pushkar) Sorry for the confusion

You'll need to replace the current VNet-injected cache with a new cache as described here: https://learn.microsoft.com/en-us/azure/azure-cache-for-redis/cache-vnet-migration

Regards

Geetha

Deole, Pushkar (Pushkar) 60 Reputation points

2023-03-09T05:53:59.75+00:00

The link provided above is not opening up. Please recheck the link.

GeethaThatipatri-MSFT 27,337 Reputation points Microsoft Employee

2023-03-09T15:35:31.04+00:00

Sorry for the trouble, please check this https://learn.microsoft.com/en-us/azure/azure-cache-for-redis/cache-vnet-migration

Regards

Geetha

GeethaThatipatri-MSFT 27,337 Reputation points Microsoft Employee

2023-03-10T15:58:14.7233333+00:00

@Deole, Pushkar (Pushkar) If you think your question has been answered, click "Mark as Accept Answer", This can be beneficial to other community members reading this forum thread.

Regards

Geetha

Deole, Pushkar (Pushkar) 60 Reputation points

2023-04-06T14:29:18.92+00:00

@GeethaThatipatri-MSFT so do you mean here that we can not migrate existing v6 cache from VNET to private endpoint and we need redeployment of new cache with private endpoint and migrate existing cache to new cache instance? Please confirm.

GeethaThatipatri-MSFT 27,337 Reputation points Microsoft Employee

2023-04-06T15:02:08.46+00:00

@Deole, Pushkar (Pushkar) Yes that is correct as i mentioned in my first statement

GeethaThatipatri-MSFT 27,337 Reputation points Microsoft Employee

2023-04-10T14:36:17.9933333+00:00

@Deole, Pushkar (Pushkar) Following up to see if the above suggestion was helpful. If this answers your query, do click Accept Answer, if you have any further query do let us know.
Sign in to comment