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Version: 3.2

Create encrypted PVCs for OpenShift with FlashArray

Volume encryption​

This guide will give you an overview of how to use the encryption feature for Portworx volumes. Under the hood, Portworx uses the libgcrypt library to interface with the dm-crypt module for creating, accessing and managing encrypted devices. Portworx uses the LUKS format of dm-crypt and AES-256 as the cipher with xts-plain64 as the cipher mode.

All encrypted volumes are protected by a passphrase. Portworx uses this passphrase to encrypt the volume data at rest as well as in transit. It is recommended to store these passphrases in a secure secret store.

There are two ways in which you can provide the passphrase to Portworx:

  1. Per volume secret: Use a unique secret for each encrypted volume

  2. Cluster-wide secret: Use a default common secret for all encrypted volumes

Use the following steps to get started with encrypted PVCs

Step 1: Select a secrets provider​

Select one of the following secret providers to store your passphrases. This passphrase will then be used for encrypting the PVCs. If you have already setup a secrets provider, goto Step 2

Step 2: Select PVC encryption method​

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