Usage of Redis sentinel

[wkloucek]

In the following I'm referring the state of release/1.2.0 branch with OO 8.2.0-rc25

I would like to use Redis Sentinel instead of plain Redis.

Therefore I would set following settings:

connections:
  redisConnectorName: ioredis
  redisHost: rfs-redis

I had a look at the used lua library:

https://github.com/ledgetech/lua-resty-redis-connector?tab=readme-ov-file#connections-via-redis-sentinel

And I had a look at the code:

Kubernetes-Docs-Shards/templates/ingresses/documentserver.yaml

Line 149 in bc77cf4

local ok, err = red:connect({{ .Values.connections.redisHost | quote }}, {{ .Values.connections.redisPort }})

Seems like the lua code is not ready for Sentinel out of the box?

@alexanderonlyoffice Did I oversee something?

[alexonlyoffice]

@wkloucek, you are right. Redis Sentinel is not supported and we do not have time to include its support in the upcoming release. We will implement it in the next version.

[wkloucek]

We will implement it in the next version.

What's the next version and it's rough ETA?

[alexonlyoffice]

@wkloucek, we are discussing the ETA. I will keep you updated.

[alexonlyoffice]

@wkloucek, we have prepared the test images of the version 8.2.2 where we added support for Redis Sentinel. You can take Helm from branch https://github.com/ONLYOFFICE/Kubernetes-Docs-Shards/tree/release/v2.1.0, the required images are uploaded to Docker Hub and have 8.2.2-4testing-sh1 tag.

documentserver.initContainers.image.tag: 8.2.2-4testing-sh1
documentserver.docservice.image.tag: 8.2.2-4testing-sh1
documentserver.proxy.image.tag: 8.2.2-4testing-sh1
documentserver.converter.image.tag: 8.2.2-4testing-sh1
customBalancer.image.tag: 8.2.2-4testing-sh1

You will also need to add the following parameters for Redis Sentinel connection to the values.yaml, please find the example below:

connections:
  redisConnectorName: ioredis
  redisHost: redis.default.svc.cluster.local
  redisPort: "26379"
  redisUser: default
  redisDBNum: "0"
  redisExistingSecret: redis
  redisSecretKeyName: redis-password
  redisNoPass: false
  redisSentinelGroupName: mymaster
  redisSentinelExistingSecret: redis
  redisSentinelSecretKeyName: redis-password
  redisSentinelUser: default
  redisSentinelPassword: ""
  redisSentinelNoPass: false

[wkloucek]

@alexonlyoffice

I get this error execution error at (docs-shards/templates/secrets/redis-sentinel-password.yaml:16:59): A Redis Sentinel Password is required!

  redisSentinelPassword: ""
  redisSentinelNoPass: false

Seems not to be allowed

[alexonlyoffice]

@wkloucek, if you are connecting with no password for Sentinel, you should try setting connections.redisSentinelNoPass=true.

BTW please take Proxy image with tag 8.2.2-4testing-sh7 as there were some fixes added. Other images can be taken with tag 8.2.2-4testing-sh1.