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Persistent Log Storage

Scheduled Pinned Locked Moved Unsolved Flight Core and Legacy VOXL
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  • wilkinsafW Offline
    wilkinsafW Offline
    wilkinsaf
    ModalAI Team
    wrote on last edited by wilkinsaf
    #1

    I am looking to have journald logs persist.
    I understand that journald stores logs under /var/log/journal
    However, I can see that /var/log/ is under volatile storage.

    f3997075-0c71-47cd-9667-ede88ab0ab53-image.png

    I understand that I should be logging to /data if I would like things to persist. Is there a configuration that ModalAI recommends to log service file output on VOXL?

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    • wilkinsafW Offline
      wilkinsafW Offline
      wilkinsaf
      ModalAI Team
      wrote on last edited by
      #2

      I might end up having to specify specific log files to write to in my .service files per
      https://www.freedesktop.org/software/systemd/man/systemd.exec.html#StandardOutput=

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      • wilkinsafW Offline
        wilkinsafW Offline
        wilkinsaf
        ModalAI Team
        wrote on last edited by
        #3

        Was going to use syslog, but saw that the service file points to null. Was wondering if this is done on purpose?

        6435fe47-e67b-46ef-b676-c657c21dcc3d-image.png

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        • wilkinsafW Offline
          wilkinsafW Offline
          wilkinsaf
          ModalAI Team
          wrote on last edited by
          #4

          Thinking an easier way here is to just change the symbolic link here
          cf9ff767-260b-4bf6-b428-c78357d40287-image.png

          and then modify journald config file to make sure we do not fill up storage with logs

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          • wilkinsafW Offline
            wilkinsafW Offline
            wilkinsaf
            ModalAI Team
            wrote on last edited by
            #5

            This seems to work, but not from bootup.
            Usually, the systemd-journal-flush.service watches for /var/log/journal to be mounted and then switches logging over to that folder, but that does not seem to be happening.

            Instead, I have to restart the systemd-journald.service to get it to log in the correct spot.

            Maybe because it is a symbolic link, and that is why the service does not see it mounted.... going to try and test that theory

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            • wilkinsafW Offline
              wilkinsafW Offline
              wilkinsaf
              ModalAI Team
              wrote on last edited by
              #6

              Yeah, all systemd-journal-flush.service is doing is running journalctl --flush which is not doing anything when run manually

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