// Module included in the following assemblies:
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// managing/assembly-rolling-updates.adoc

[id='proc-manual-rolling-update-strimzipodset-{context}']
= Performing a rolling update using a pod management annotation

[role="_abstract"]
This procedure describes how to trigger a rolling update of Kafka, Kafka Connect, MirrorMaker 2, or ZooKeeper clusters.
To trigger the update, you add an annotation to the `StrimziPodSet` that manages the pods running on the cluster.

.Prerequisites

To perform a manual rolling update, you need a running Cluster Operator.
The cluster for the component you are updating, whether it's Kafka, Kafka Connect, MirrorMaker 2, or ZooKeeper, must also be running.

.Procedure

. Find the name of the resource that controls the pods you want to manually update.
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For example, if your Kafka cluster is named _my-cluster_, the corresponding names are _my-cluster-kafka_ and _my-cluster-zookeeper_.
For a Kafka Connect cluster named _my-connect-cluster_, the corresponding name is _my-connect-cluster-connect_.
And for a MirrorMaker 2 cluster named _my-mm2-cluster_, the corresponding name is _my-mm2-cluster-mirrormaker2_.

. Use `kubectl annotate` to annotate the appropriate resource in Kubernetes.
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.Annotating a StrimziPodSet
[source,shell,subs=+quotes]
----
kubectl annotate strimzipodset <cluster_name>-kafka strimzi.io/manual-rolling-update=true

kubectl annotate strimzipodset <cluster_name>-zookeeper strimzi.io/manual-rolling-update=true

kubectl annotate strimzipodset <cluster_name>-connect strimzi.io/manual-rolling-update=true

kubectl annotate strimzipodset <cluster_name>-mirrormaker2 strimzi.io/manual-rolling-update=true
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. Wait for the next reconciliation to occur (every two minutes by default).
A rolling update of all pods within the annotated resource is triggered, as long as the annotation was detected by the reconciliation process.
When the rolling update of all the pods is complete, the annotation is automatically removed from the resource.
