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Edit note on backing up K3s before upgrading

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Catherine Luse
2020-03-31 13:43:51 -07:00
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content/rancher/v2.x/en/cluster-provisioning/imported-clusters/_index.md
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@@ -84,7 +84,7 @@ When a K3s cluster is imported, Rancher will recognize it as K3s, and the Ranche
### Configuring K3s Cluster Upgrades
> **Important:** Before upgrading the Kubernetes version of a high-availability K3s cluster, back up the database in whichever way is recommended by the relational database provider. If the upgrade fails, restore the cluster from the snapshot.
> **Important:** It is a Kubernetes best practice to back up the cluster before upgrading. When upgrading a high-availability K3s cluster with an external database, back up the database in whichever way is recommended by the relational database provider.
The **concurrency** is the maximum number of nodes that are permitted to be unavailable during an upgrade. If number of unavailable nodes is larger than the **concurrency,** the upgrade will fail. If an upgrade fails, you may need to repair or remove failed nodes before the upgrade can succeed.