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Enhance air-gapped migration instructions for Rancher backup and restore

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Alex Seymour
2026-02-05 15:00:08 +01:00
parent 20fab76cfc
commit ee021062c6
1 changed files with 27 additions and 10 deletions
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docs/how-to-guides/new-user-guides/backup-restore-and-disaster-recovery/migrate-rancher-to-new-cluster.md
+27 -10
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@@ -42,23 +42,41 @@ Install the [`rancher-backup chart`](https://github.com/rancher/backup-restore-o
``` ```
1. Install the charts: 1. Install the charts:
```bash ```bash
helm install rancher-backup-crd rancher-charts/rancher-backup-crd -n cattle-resources-system --create-namespace --version $CHART_VERSION helm install rancher-backup-crd rancher-charts/rancher-backup-crd -n cattle-resources-system --create-namespace --version $CHART_VERSION
helm install rancher-backup rancher-charts/rancher-backup -n cattle-resources-system --version $CHART_VERSION helm install rancher-backup rancher-charts/rancher-backup -n cattle-resources-system --version $CHART_VERSION
``` ```
:::note :::note
The above assumes an environment with outbound connectivity to Docker Hub. The above assumes an environment with outbound connectivity to Docker Hub and to charts.rancher.io.
For an **air-gapped environment**, use the following Helm values to pull the `backup-restore-operator` and `kubectl` images from your private registry when you install the rancher-backup Helm chart. For an **air-gapped environment**, use the following Helm values to pull the `backup-restore-operator` and `kubectl` images from your private registry when you install the rancher-backup Helm chart.
```bash ```bash
--set image.repository <registry>/rancher/backup-restore-operator --set global.kubectl.repository=<registry>/rancher/kubectl --set image.repository=<registry>/rancher/backup-restore-operator --set global.kubectl.repository=<registry>/rancher/kubectl
``` ```
::: If the host running the Helm commands is **also air-gapped and cannot reach charts.rancher.io**, download the charts on a non-air-gapped host and then install them from local files on the air-gapped host.
On a non-air-gapped host:
```bash
helm repo add rancher-charts https://charts.rancher.io
helm repo update
helm fetch rancher-charts/rancher-backup-crd --version $CHART_VERSION
helm fetch rancher-charts/rancher-backup --version $CHART_VERSION
```
Copy the `rancher-backup-crd-<chart-version>.tgz` and `rancher-backup-<chart-version>.tgz` files to the air-gapped host, then use them to install the charts:
```bash
helm install rancher-backup-crd ./rancher-backup-crd-<chart-version>.tgz -n cattle-resources-system --create-namespace
helm install rancher-backup ./rancher-backup-<chart-version>.tgz -n cattle-resources-system --set image.repository=<registry>/rancher/backup-restore-operator --set global.kubectl.repository=<registry>/rancher/kubectl
```
:::
### 2. Restore from backup using a Restore custom resource ### 2. Restore from backup using a Restore custom resource
@@ -200,7 +218,7 @@ Full instructions on how to redirect traffic to the migrated cluster differ base
### 6. Scale Down the Original Rancher Instance ### 6. Scale Down the Original Rancher Instance
After redirecting traffic to the new Rancher environment, **scale the original Rancher instance to 0 replicas** so it no longer contacts your managed clusters. After redirecting traffic to the new Rancher environment, **scale the original Rancher instance to 0 replicas** so it no longer contacts your managed clusters.
Leaving the old server up can cause agents to keep contacting the original `server-url`, which often leaves clusters stuck in **Updating** in the new environment. Leaving the old server up can cause agents to keep contacting the original `server-url`, which often leaves clusters stuck in **Updating** in the new environment.
@@ -225,4 +243,3 @@ kubectl rollout restart deployment cattle-cluster-agent -n cattle-system
This triggers a rolling restart of the agent so it re-establishes the connection to the new Rancher environment. This triggers a rolling restart of the agent so it re-establishes the connection to the new Rancher environment.
::: :::