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rkt and the Trusted Platform Module

rkt supports measuring container state and configuration into the Trusted Platform Module (TPM) event log. Enable this functionality by building rkt with the --enable-tpm=yes option to ./configure. rkt accesses the TPM via the tpmd executable available from the go-tspi project. This tpmd is expected to listen on port 12041.

Events are logged to PCR 15, with event type 0x1000. Each event contains the following data:

  1. The hash of the container root filesystem
  2. The hash of the contents of the container manifest data
  3. The hash of the arguments passed to stage1

This provides a cryptographically verifiable audit log of the containers executed on a node, including the configuration of each.

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