ntpmemlog.txt

ntpmemlog.txt

# grep ntpstats /etc/fstab
tmpfs    /var/log/ntpstats    tmpfs    defaults,noatime,nodiratime,nosuid,mode=0755,size=200m    0 0

# cat /etc/init.d/ntpmemlog
#!/bin/sh
### BEGIN INIT INFO
# Provides:          ntpmemlog
# Required-Start:    $local_fs $time
# X-Stop-After:      $time
# Required-Start:    $local_fs $time
# Required-Stop:     $local_fs
# Default-Start:     S
# Default-Stop:      0 1 6
# Short-Description: Restore to and save ntpstats from tmpfs filesystem
# Description:       Restore to and save ntpstats from tmpfs filesystem
### END INIT INFO

# /etc/init.d/ntpmemlog
# Credit: https://steinar.bang.priv.no/2016/07/03/logging-to-persistent-tmpfs-on-raspbian-jessie/
#

case "$1" in
  start)
    echo "Syncing ntpstats from storage to tmpfs"
    rsync -avrq /var/backups/ntpstats/* /var/log/ntpstats/
    echo "[`date +"%Y-%m-%d %H:%M"`] tmpfs synced from storage (start)" >> /var/log/ramdisk_sync.log
    ;;
  sync)
    echo "Syncing ntpstats from tmpfs to storage"
    echo "[`date +"%Y-%m-%d %H:%M"`] ntpstats synced to storage (sync)" >> /var/log/ramdisk_sync.log
    rsync -avryq --delete --force /var/log/ntpstats/* /var/backups/ntpstats/
    ;;
  stop)
    echo "Syncing ntpstats from tmpfs to storage"
    echo "[`date +"%Y-%m-%d %H:%M"`] ntpstats synced to storage (stop)" >> /var/log/ramdisk_sync.log
    rsync -avrq --delete --force /var/log/ntpstats/* /var/backups/ntpstats/
    ;;
  status)
    echo "Comparing ntpstats from tmpfs to storage"
    echo
    rsync -avr --dry-run --force /var/log/ntpstats/* /var/backups/ntpstats/
    ;;
  *)
    echo "Usage: /etc/init.d/ntpmemlog {start|stop|status}"
    exit 1
    ;;
esac

exit 0