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fix: Ensure log is tailed at correct offset for container restarts

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Brennan Kinney 2024-08-02 12:01:34 +12:00 committed by GitHub
parent 5be9665997
commit 4f1d075d43
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1 changed files with 9 additions and 6 deletions
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15
target/scripts/start-mailserver.sh
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@ -194,13 +194,16 @@ fi
# marker to check if container was restarted
date >/CONTAINER_START
# Container logs will receive updates to this log file:
MAIN_LOGFILE=/var/log/mail/mail.log
# NOTE: rsyslogd would usually create this later during `_start_daemons`, however it would already exist if the container was restarted.
touch "${MAIN_LOGFILE}"
# Ensure `tail` follows the correct position of the log file for this container start (new logs begin once `_start_daemons` is called)
TAIL_START=$(wc -l < "${MAIN_LOGFILE}")
[[ ${LOG_LEVEL} =~ (debug|trace) ]] && print-environment
_start_daemons
# Container start-up scripts completed. `tail` will now pipe the log updates to stdout:
_log 'info' "${HOSTNAME} is up and running"
# NOTE: This file should already exist with log output from rsyslogd:
touch /var/log/mail/mail.log
# Container logs will receive updates to this log file,
# `-n +0` ensures we output to stdout from the first line of the file.
exec tail -Fn +0 /var/log/mail/mail.log
exec tail -Fn "+${TAIL_START}" "${MAIN_LOGFILE}"