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docs(downgrade): highlights the standard order of downgrade #11144

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Feb 17, 2025
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docs(downgrade): highlights the standard order of downgrade #11144

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docs(downgrade): highlights the standard order of downgrade
PaulRMellor Feb 13, 2025
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docs(downgrade): removes unnecessary line
PaulRMellor Feb 13, 2025
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docs(review): makes clear steps may need to be repeated
PaulRMellor Feb 17, 2025
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26 changes: 18 additions & 8 deletions documentation/assemblies/upgrading/assembly-downgrade.adoc
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[role="_abstract"]
If you are encountering issues with the version of Strimzi you upgraded to,
you can revert your installation to the previous version.
you can revert to a previous version.

If you used the YAML installation files to install Strimzi, you can use the YAML installation files from the previous release to perform the downgrade procedures.
You can downgrade Strimzi by updating the Cluster Operator and the version of Kafka you are using.
Kafka version downgrades are performed by the Cluster Operator.
If you installed Strimzi using the YAML installation files, you can use the files from the previous release to perform the downgrade.

Downgrading Strimzi involves two key steps:

. Downgrading the Kafka cluster to a version supported by the target Cluster Operator (if required).
. Downgrading the Cluster Operator to the previous release.
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If downgrading through multiple versions, you may need to repeat these steps.

Always downgrade Kafka before the Cluster Operator to maintain compatibility.
Ensure that the Kafka version you downgrade to is supported by the target Cluster Operator.
The metadata version of the Kafka cluster must not be higher than the maximum version supported by the downgraded Kafka version.

WARNING: The following downgrade instructions are only suitable if you installed Strimzi using the installation files.
If you installed Strimzi using another method, like {OperatorHub}, downgrade may not be supported by that method unless specified in their documentation.
To ensure a successful downgrade process, it is essential to use a supported approach.
If you installed Strimzi using another method, such as {OperatorHub}, downgrade may not be supported by that method unless specified in its documentation.

//steps to downgrade Kafka
include::../../modules/upgrading/proc-downgrade-kafka-kraft.adoc[leveloffset=+1]

//steps to downgrade the operators
include::../../modules/upgrading/proc-downgrade-cluster-operator.adoc[leveloffset=+1]

//steps to downgrade Kafka
include::../../modules/upgrading/proc-downgrade-kafka-kraft.adoc[leveloffset=+1]

4 changes: 1 addition & 3 deletions documentation/modules/upgrading/proc-downgrade-cluster-operator.adoc
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[id='proc-downgrade-cluster-operator-{context}']
= Downgrading the Cluster Operator to a previous version

If you are encountering issues with Strimzi,
you can revert your installation.

[role="_abstract"]
This procedure describes how to downgrade a Cluster Operator deployment to a previous version.

NOTE: Kafka clusters managed by Strimzi always use node pools.
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