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Confirm the correct kubeconfig is being used #2635

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Confirm the correct kubeconfig is being used #2635

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22 changes: 22 additions & 0 deletions content/rancher/v2.x/en/upgrades/upgrades/ha/_index.md
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Expand Up @@ -22,6 +22,28 @@ If you installed Rancher using the RKE Add-on yaml, follow the directions to [mi

- **Review the [known upgrade issues]({{<baseurl>}}/rancher/v2.x/en/upgrades/upgrades/#known-upgrade-issues) and [caveats]({{<baseurl>}}/rancher/v2.x/en/upgrades/upgrades/#caveats)** in the Rancher documentation for the most noteworthy issues to consider when upgrading Rancher. A more complete list of known issues for each Rancher version can be found in the release notes on [GitHub](https://github.com/rancher/rancher/releases) and on the [Rancher forums.](https://forums.rancher.com/c/announcements/12)
- **For [air gap installs only,]({{<baseurl>}}/rancher/v2.x/en/installation/other-installation-methods/air-gap) collect and populate images for the new Rancher server version.** Follow the guide to [populate your private registry]({{<baseurl>}}/rancher/v2.x/en/installation/other-installation-methods/air-gap/populate-private-registry/) with the images for the Rancher version that you want to upgrade to.
- **Confirm the correct kubeconfig YAML file is configured**, follow the steps below to confirm the Rancher management cluster kubeconfig is configured.

Set the `KUBECONFIG` environment variable for the Rancher management cluster that is being upgraded.

```
export KUBECONFIG=$(pwd)/kube_config_rancher-cluster.yml
```

Verify that it contains the correct `server` parameter, it should point directly to one of your cluster nodes on port `6443`.

```
kubectl config view -o=jsonpath='{.clusters[*].cluster.server}'
https://NODE:6443
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Do we want to add a note for the use of localhost in case of k3s (where people did not replace it with their load balancer/node address)?

```

If the output from the command shows your Rancher hostname with the suffix `/k8s/clusters`, the wrong kubeconfig YAML file is configured. It should be the file that was created with RKE or K3s when creating the cluster to run Rancher.

Confirm that Rancher pods are running within the cluster.
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If this is a separate step, should it be in the list above so it doesn't get overlooked?


```
kubectl get pods -n cattle-system
```

# Upgrade Outline

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