Azure – You can now automatically generate new key version (auto-rotation) in Key Vault (preview)

As you should already know you can use Azure Key Vault to store secret (either keys, secret or certificates) in a secure way for use by end users and/or automation.

Well, until then when you had a key going to expired you had to manually renew/update it.

Not anymore, you can now configure auto-rotation to automatically create a new key version when needed.

Before you start looking into it, few things:

  • You need to have Key Vault Administrator role assigned to the user/group going to manage the auto-rotation feature
  • You need to grant the Rotation and Get Rotation Policy permissions in the Access Policies
  • You can enable the auto-rotation on existing keys

During the preview there is no cost associated with it; once GA, there will be a cost (US $1 per rotation).

Grant the Key Vault Administrator role

Connect to your Azure portal (https://portal.azure.com) to access the Access Control blade of the Key Vault you want to grant the role and configure auto-rotation

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Enable the Rotation permissions

To enable the Rotation permissions, access the Access Policies to edit existing policy or create a new one and grant at minimum the Get Rotation Policy permission; you can also grant the Rotate permission if you want to allow the identity to allow the rotation on demand

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If you don’t grant these permissions, when you will create a new Key and configure the the auto-rotation you will get the error

The operation “Get Rotation Policy” is not enabled in this key vault’s access policy.

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Configure the auto-rotation

You can enable the auto-rotation during the creation of a new key or edit an existing one by accessing the key and access the Rotation policy tab

The Expiry time must be at least 28 days

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If you also have granted the Rotate permission to the identity, you can use the Rotate now to immediately rotate the version; this can be helpful if you urgently need to rotate

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