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Updating Redis version Overview
This guide will give you an overview on how KubeDB Enterprise operator upgrade the version of Redis
database.
Before You Begin
- You should be familiar with the following
KubeDB
concepts:
How Update Version Process Works
The following diagram shows how KubeDB Enterprise operator used to upgrade the version of Redis
. Open the image in a new tab to see the enlarged version.
The updating process consists of the following steps:
At first, a user creates a
Redis
/RedisSentinel
Custom Resource (CR).KubeDB
Community operator watches theRedis
andRedisSentinel
CR.When the operator finds a
Redis
/RedisSentinel
CR, it creates required number ofStatefulSets
and related necessary stuff like appbinding, services, etc.Then, in order to upgrade the version of the
Redis
database the user creates aRedisOpsRequest
CR with the desired version.Then, in order to upgrade the version of the
RedisSentinel
database the user creates aRedisSentinelOpsRequest
CR with the desired version.KubeDB
Enterprise operator watches theRedisOpsRequest
andRedisSentinelOpsRequest
CR.When it finds a
RedisOpsRequest
CR, it halts theRedis
object which is referred from theRedisOpsRequest
. So, theKubeDB
Community operator doesn’t perform any operations on theRedis
object during the upgrading process.When it finds a
RedisSentinelOpsRequest
CR, it halts theRedisSentinel
object which is referred from theRedisSentinelOpsRequest
. So, theKubeDB
Community operator doesn’t perform any operations on theRedisSentinel
object during the upgrading process.By looking at the target version from
RedisOpsRequest
/RedisSentinelOpsRequest
CR,KubeDB
Enterprise operator updates the images of all theStatefulSets
.After successfully updating the
StatefulSets
and theirPods
images, theKubeDB
Enterprise operator updates the image of theRedis
/RedisSentinel
object to reflect the updated state of the database.After successfully updating of
Redis
/RedisSentinel
object, theKubeDB
Enterprise operator resumes theRedis
/RedisSentinel
object so that theKubeDB
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.
Next Steps
- Learn how to Update Version of Redis Standalone
- Learn how to Update Version of Redis Cluster
- Learn how to Update Version of Redis Sentinel