Before installing HCI, configure Docker with settings suitable for your environment. For guidance on configuring and running Docker, see the applicable Docker documentation.
- Ensure that the Docker installation directory on the instance has at least 20 GB available for storing the HCI Docker images.
- Ensure that the Docker storage driver is configured correctly on the instance.
After installation, changing the Docker storage driver requires reinstallation of HCI.To view the current Docker storage driver on an instance, run: docker info .
- If you want to enable SELinux on the system instances, use a Docker storage driver that supports it.
The storage drivers that SELinux supports differ depending on the Linux distribution you're using. For more information, see the Docker documentation.
- If you are using the Docker devicemapper storage driver, ensure that there's at least 40 GB of Docker metadata storage space available on the instance. HCI requires 20 GB to install successfully and an additional 20 GB to successfully update to a later version.
To view Docker metadata storage usage on an instance, run: docker infoNote: On a production system, do not run devicemapper in loop-lvm mode. This can cause slow performance or, on certain Linux distributions, HCI may not have enough space to run.