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Run nightly tasks on a random minute after 03:00 to avoid overload

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- The MIAB version check regularly fails at 03:00, presumably because a
  large portion of installations is checking mailinabox.email at the same
  time.
- At installation time, the time of the nightly clock is configured to
  run at a random minute after 03:00, but before 04:00.
- Users might expect the nightly tasks to be over at a certain time and
  run their own custom tasks afterwards. This could thus interfere with
  custom backup routines.
- This breaks reproducibility of the installation process.
- Users might also be surprised by the nightly task time changing after
  updatign MIAB.
This commit is contained in:
clonejo 2020-05-03 16:34:42 +02:00
parent 40b21c466d
commit 8c71fd192f
1 changed files with 2 additions and 1 deletions
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3
setup/management.sh
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@ -101,10 +101,11 @@ hide_output systemctl enable mailinabox.service
# Perform nightly tasks at 3am in system time: take a backup, run
# status checks and email the administrator any changes.
minute=$((RANDOM % 60)) # avoid overloading mailinabox.email
cat > /etc/cron.d/mailinabox-nightly << EOF;
# Mail-in-a-Box --- Do not edit / will be overwritten on update.
# Run nightly tasks: backup, status checks.
0 3 * * * root (cd `pwd` && management/daily_tasks.sh)
$minute 3 * * * root (cd `pwd` && management/daily_tasks.sh)
EOF
# Start the management server.