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Say that you can migrate from Docker install with backup operator

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Catherine Luse
2020-12-08 18:29:05 -07:00
parent 72e255f750
commit 7944005a52
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content/rancher/v2.x/en/installation/other-installation-methods/single-node-docker/_index.md
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@@ -8,8 +8,6 @@ aliases:
- /rancher/v2.x/en/installation/other-installation-methods/single-node
---
> The Docker installation is for development and testing environments only. When the Rancher server is installed with Docker, it cannot be migrated to a Kubernetes cluster for a production environment.
Rancher can be installed by running a single Docker container.
In this installation scenario, you'll install Docker on a single Linux host, and then deploy Rancher on your host using a single Docker container.
@@ -17,6 +15,12 @@ In this installation scenario, you'll install Docker on a single Linux host, and
> **Want to use an external load balancer?**
> See [Docker Install with an External Load Balancer]({{<baseurl>}}/rancher/v2.x/en/installation/options/single-node-install-external-lb) instead.
A Docker installation of Rancher is recommended only for development and testing purposes. The ability to migrate Rancher to a high-availability cluster depends on the Rancher version:
- For Rancher v2.0-v2.4, there was no migration path from a Docker installation to a high-availability installation. Therefore, if you are using Rancher prior to v2.5, you may want to use a Kubernetes installation from the start.
- For Rancher v2.5+, the Rancher backup operator can be used to migrate Rancher from the single Docker container install to an installation on a high-availability Kubernetes cluster. For details, refer to the documentation on [migrating Rancher to a new cluster.]({{<baseurl>}}/rancher/v2.x/en/backups/v2.5/migrating-rancher/)
### Privileged Access for Rancher v2.5+
When the Rancher server is deployed in the Docker container, a local Kubernetes cluster is installed within the container for Rancher to use. Because many features of Rancher run as deployments, and privileged mode is required to run containers within containers, you will need to install Rancher with the `--privileged` option.