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rngd.service が起動に失敗し、"[jitter]: Unable to obtain AES key, disabling JITTER source" というメッセージが表示される

Solution Verified - Updated -

Issue

  • VMware システムで rngd.service が起動すると、ジャーナルに次のメッセージが表示されます。

    [...] rngd[xxx]: [jitter]: JITTER timeout set to 5 sec
    [...] rngd[xxx]: [jitter]: Initializing AES buffer
    [...] rngd[xxx]: [jitter]: Unable to obtain AES key, disabling JITTER source
    [...] rngd[xxx]: [jitter]: Initialization Failed
    [...] rngd[xxx]: Can't open any entropy source

Environment

  • Red Hat Enterprise Linux 8
    • rdrand 機能を持たない CPU
    • /dev/hwrng を実装していない VMware またはシステム

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