VM Host rebooted by itself

[debian112]

Are there any cron jobs that are installed that reboots the VM Host?

Jun 12 10:31:33 vm10 rrdcached[4256]: Replayed 104532 entries (0 failures)
Jun 12 10:31:33 vm10 rrdcached[4256]: replaying from journal: /var/lib/rrdcached/journal/rrd.journal.1434116753.928703
Jun 12 10:31:33 vm10 rrdcached[4256]: Malformed journal entry at line 74609
Jun 12 10:31:33 vm10 rrdcached[4256]: Replayed 74608 entries (1 failures)
Jun 12 10:31:33 vm10 rrdcached[4256]: started new journal /var/lib/rrdcached/journal/rrd.journal.1434119493.241523
Jun 12 10:31:33 vm10 rrdcached[4256]: journal processing complete
Jun 12 10:31:33 vm10 rrdcached[4256]: listening for connections
Jun 12 10:31:33 vm10 postfix/master[4381]: daemon started -- version 2.9.6, configuration /etc/postfix
Jun 12 10:31:33 vm10 /usr/sbin/cron[4418]: (CRON) INFO (pidfile fd = 3)
Jun 12 10:31:33 vm10 /usr/sbin/cron[4421]: (CRON) STARTUP (fork ok)
Jun 12 10:31:33 vm10 /usr/sbin/cron[4421]: (CRON) INFO (Running @reboot jobs)

 

[sumsum]

Any hints in the Kernel logfile ?

 

[debian112]

Nothing before the reboot:
Jun 9 16:06:38 vm10 kernel: EXT4-fs (sdb1): Unaligned AIO/DIO on inode 7077891 by kvm; performance will be poor.
Jun 10 16:06:40 vm10 kernel: EXT4-fs (sdb1): Unaligned AIO/DIO on inode 5242883 by kvm; performance will be poor.
Jun 11 16:06:40 vm10 kernel: EXT4-fs (sdb1): Unaligned AIO/DIO on inode 5242883 by kvm; performance will be poor.
Jun 12 10:31:32 vm10 kernel: imklog 5.8.11, log source = /proc/kmsg started.
Jun 12 10:31:32 vm10 kernel: Initializing cgroup subsys cpuset
Jun 12 10:31:32 vm10 kernel: Initializing cgroup subsys cpu
Jun 12 10:31:32 vm10 kernel: Linux version 2.6.32-22-pve (root@lola) (gcc version 4.7.2 (Debian 4.7.2-5) ) #1 SMP Mon Jul 15 08:36:46 CEST 2013
Jun 12 10:31:32 vm10 kernel: Command line: BOOT_IMAGE=/vmlinuz-2.6.32-22-pve root=/dev/mapper/pve-root ro quiet

 

[debian112]

Any idea what else I can check?

 

[pirateghost]

By default, there is nothing that will restart the server without your intervention.

I would start with power supply. Test it. Make sure its good

 

[udo]

Are there any cron jobs that are installed that reboots the VM Host?

Jun 12 10:31:33 vm10 rrdcached[4256]: Replayed 104532 entries (0 failures)
Jun 12 10:31:33 vm10 rrdcached[4256]: replaying from journal: /var/lib/rrdcached/journal/rrd.journal.1434116753.928703
Jun 12 10:31:33 vm10 rrdcached[4256]: Malformed journal entry at line 74609
Jun 12 10:31:33 vm10 rrdcached[4256]: Replayed 74608 entries (1 failures)
Jun 12 10:31:33 vm10 rrdcached[4256]: started new journal /var/lib/rrdcached/journal/rrd.journal.1434119493.241523
Jun 12 10:31:33 vm10 rrdcached[4256]: journal processing complete
Jun 12 10:31:33 vm10 rrdcached[4256]: listening for connections
Jun 12 10:31:33 vm10 postfix/master[4381]: daemon started -- version 2.9.6, configuration /etc/postfix
Jun 12 10:31:33 vm10 /usr/sbin/cron[4418]: (CRON) INFO (pidfile fd = 3)
Jun 12 10:31:33 vm10 /usr/sbin/cron[4421]: (CRON) STARTUP (fork ok)
Jun 12 10:31:33 vm10 /usr/sbin/cron[4421]: (CRON) INFO (Running @reboot jobs)

Hi,
this mean the other way.

See "man -s 5 crontab"

       Instead of the first five fields, one of eight special strings may appear:

              string         meaning
              ------         -------
              @reboot        Run once, at startup.
              @yearly        Run once a year, "0 0 1 1 *".
              @annually      (same as @yearly)
              @monthly       Run once a month, "0 0 1 * *".
              @weekly        Run once a week, "0 0 * * 0".
              @daily         Run once a day, "0 0 * * *".
              @midnight      (same as @daily)
              @hourly        Run once an hour, "0 * * * *".

cron is simply looking for an job, which has to execute after booting the host.

Udo