Error: Server closed the connection

Question

Every time I start my redis cluster and connect to it, I get this error when trying to run any command.
Error: Server closed the connection

Answer 1

eris October 7, 2020

Hey,

What client are you using to connect? As mentioned in our documentation, the official redis-cli client does not yet support TLS, which is required to connect to our managed redis. With that in mind, we suggest connecting using redli, which does support TLS and has been tested to work properly with our managed redis.

Best,
Eris
Customer Success Engineer

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Geesu October 9, 2020

Can you update your documentation? There are examples using redis-cli.

https://www.digitalocean.com/community/tutorials/how-to-migrate-redis-data-to-a-digitalocean-managed-database

How To Migrate Redis Data to a DigitalOcean Managed Database
by Mark Drake
Redis provides a number of methods one can use to migrate data from one instance to another, like replication and snapshotting. However, migrations can get complicated when you're moving data to a Redis instance managed by a cloud provider, as managed databases tend to limit how much control you have over the database's configuration. This tutorial outlines one method you can use to migrate data to a Redis instance managed by DigitalOcean using Redis's internal MIGRATE command.
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- eris October 9, 2020
  
  That tutorial explains that in order to connect to the managed redis instance with redis-cli you need to use a TLS tunnel like stunnel. The use of stunnel here makes it possible to use redis-cli to connect to the managed redis database.
  
  There are places where using redis-cli might make sense, like that migration example – but stunnel is necessary. This other tutorial (which is linked as a prerequisite to the tutorial you linked) explains this: https://www.digitalocean.com/community/tutorials/how-to-connect-to-managed-redis-over-tls-with-stunnel-and-redis-cli
  
  The product documentation page I linked also mentions this workaround. We still recommend redli because it’s simpler for most use-cases.
  
  Eris
  
  How To Connect to a Managed Redis Instance over TLS with Stunnel and redis-cli
  by Mark Drake
  Stunnel is an open-source proxy used to create secure tunnels, allowing you to communicate with other machines over TLS. In this guide, we will walk through the steps of installing and configuring stunnel so you can connect to a managed Redis instance over TLS with redis-cli.
  
  Reply Report

Answer 2

Geesu October 9, 2020

Can you update your documentation? There are examples using redis-cli.

https://www.digitalocean.com/community/tutorials/how-to-migrate-redis-data-to-a-digitalocean-managed-database

How To Migrate Redis Data to a DigitalOcean Managed Database
by Mark Drake
Redis provides a number of methods one can use to migrate data from one instance to another, like replication and snapshotting. However, migrations can get complicated when you're moving data to a Redis instance managed by a cloud provider, as managed databases tend to limit how much control you have over the database's configuration. This tutorial outlines one method you can use to migrate data to a Redis instance managed by DigitalOcean using Redis's internal MIGRATE command.
Reply Report
- eris October 9, 2020
  
  That tutorial explains that in order to connect to the managed redis instance with redis-cli you need to use a TLS tunnel like stunnel. The use of stunnel here makes it possible to use redis-cli to connect to the managed redis database.
  
  There are places where using redis-cli might make sense, like that migration example – but stunnel is necessary. This other tutorial (which is linked as a prerequisite to the tutorial you linked) explains this: https://www.digitalocean.com/community/tutorials/how-to-connect-to-managed-redis-over-tls-with-stunnel-and-redis-cli
  
  The product documentation page I linked also mentions this workaround. We still recommend redli because it’s simpler for most use-cases.
  
  Eris
  
  How To Connect to a Managed Redis Instance over TLS with Stunnel and redis-cli
  by Mark Drake
  Stunnel is an open-source proxy used to create secure tunnels, allowing you to communicate with other machines over TLS. In this guide, we will walk through the steps of installing and configuring stunnel so you can connect to a managed Redis instance over TLS with redis-cli.
  
  Reply Report

Answer 3

alexdo February 29, 2020

Hello, @vikramkh

Could you please let me know if this is a new Redis cluster setup or your working/production setup has suddenly started throwing this error?

Also you can check the redis error log in order to track down any errors as they might help you to sort the issue. Feel free to paste any logged errors here so we can check them.

Let me know how it goes.

Regards,
Alex

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pindo July 6, 2020

Hi @alexdo,

I’m also facing the same error
db-redis-host:port> PING Error: Server closed the connection db-redis-host:port>
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- userjl September 12, 2020
  
  I have the exact same problem, how did you resolve this?
  
  Reply Report
userjl September 12, 2020

Hello Alex, I have the same error on my end. Just checked the redis cluster logs but there’s no error log.

More context: I’m testing redis database (Redis 5, $15/month)
Thanks
Reply Report

Answer 4

pindo July 6, 2020

Hi @alexdo,

I’m also facing the same error
db-redis-host:port> PING Error: Server closed the connection db-redis-host:port>
Reply Report
- userjl September 12, 2020
  
  I have the exact same problem, how did you resolve this?
  
  Reply Report
userjl September 12, 2020

Hello Alex, I have the same error on my end. Just checked the redis cluster logs but there’s no error log.

More context: I’m testing redis database (Redis 5, $15/month)
Thanks
Reply Report

Answer 5

mraburn January 31, 2021

For anyone who lands on this page with connection issues using Node to connect to a DO Redis DB, TLS is required. You can use the URL method to connect which is redis with 2 s’s…

rediss://....

or construct the connection and set TLS to true.

const client = redis.createClient({
host: process.env.REDISHOST,
port: process.env.REDISPORT,
password: process.env.REDIS_PASSWORD,
TLS: true
});

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