Caution users that they must reduce replica count by 1 when scaling in #963
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Feediver1
reviewed
Jan 27, 2025
Feediver1
reviewed
Jan 27, 2025
| The Decommission controller is responsible for monitoring the StatefulSet for changes in the number replicas. When the number of replicas is reduced, the controller decommissions brokers, starting from the highest Pod ordinal, until the number of brokers matches the number of replicas. For example, you have a Redpanda cluster with the following brokers: | ||
| The Decommission controller is responsible for monitoring the StatefulSet for changes in the number replicas. When the number of replicas is reduced, the controller decommissions brokers, starting from the highest Pod ordinal, until the number of brokers matches the number of replicas. | ||
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| [mermaid] |
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Any reason why you want the workflow to be aligned on the side of the legend rather than underneath?
david-yu
approved these changes
Jan 27, 2025
Feediver1
reviewed
Jan 27, 2025
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| - For each Redpanda Pod on that Node, it identifies the PVC (if any) the Pod was using for its storage. | ||
| - It sets the reclaim policy of the affected PersistentVolume (PV) to `Retain`. | ||
| - It deletes the associated PersistentVolumeClaim (PVC) to allows the Redpanda broker Pod to reschedule onto a new, operational node. |
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Suggested change
| - It deletes the associated PersistentVolumeClaim (PVC) to allows the Redpanda broker Pod to reschedule onto a new, operational node. | |
| - It deletes the associated PersistentVolumeClaim (PVC) to allow the Redpanda broker Pod to reschedule onto a new, operational node. |
Feediver1
reviewed
Jan 27, 2025
| == Prerequisites | ||
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| - An existing Redpanda cluster in Kubernetes. | ||
| - Sufficient RBAC permissions for Nodewatcher to read and modify PVs, PVCs, and Node resources. |
Feediver1
reviewed
Jan 27, 2025
| ---- | ||
| + | ||
| - `--additional-controllers="nodeWatcher"`: Enables the Nodewatcher controller. | ||
| - `rbac.createAdditionalControllerCRs=true`: Creates the required RBAC rules for the Redpanda Operator to monitor the Node resources and update PVCs and PVs. |
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Suggested change
| - `rbac.createAdditionalControllerCRs=true`: Creates the required RBAC rules for the Redpanda Operator to monitor the Node resources and update PVCs and PVs. | |
| - `--rbac.createAdditionalControllerCRs=true`: Creates the required RBAC rules for the Redpanda Operator to monitor the Node resources and update PVCs and PVs. |
Feediver1
approved these changes
Jan 27, 2025
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Description
Also fixes https://github.com/redpanda-data/documentation-private/issues/2701
Review deadline: 24 Jan
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