How to configure encrypted storage with LUKS using exportable keys instead of passphrases

Solution Verified - Updated -

Issue

  • We need a way to have encrypted block storage using exportable keys (key files), instead of passphrases
  • How to create a LUKS device that can be unlocked using a keyfile instead of a passphrase?

Environment

  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 5
  • LUKS

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