我有一台运行 ubuntu server 18.04.1 LTS 的虚拟机。它已经运行 alfresco 超过 5 年了。现在它开始自行关闭。我没有做任何更新，也没有在服务器上更改任何内容，它甚至没有开放供外部访问。
虚拟机正在 Unraid 上运行。
有人可以帮助我。
谢谢。
编辑：
这是关机的日志部分。
May 29 04:01:06 srvalfresco systemd-timesyncd[660]: Synchronized to time server 185.125.190.57:123 (ntp.ubuntu.com).
May 29 04:17:01 srvalfresco CRON[9690]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
May 29 08:04:23 srvalfresco kernel: [ 0.000000] Linux version 4.15.0-197-generic (buildd@lcy02-amd64-110) (gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04)) #208-Ubuntu SMP Tue Nov 1 17:23:37 UTC 2022 (Ubuntu 4.15.0-197.208-generic 4.15.18)
May 29 08:04:23 srvalfresco kernel: [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.15.0-197-generic root=UUID=0638a370-ef33-11e8-8751-525400655308 ro
May 29 08:04:23 srvalfresco kernel: [ 0.000000] KERNEL supported cpus:
May 29 08:04:23 srvalfresco kernel: [ 0.000000] Intel GenuineIntel
May 29 08:04:23 srvalfresco kernel: [ 0.000000] AMD AuthenticAMD
May 29 08:04:23 srvalfresco kernel: [ 0.000000] Centaur CentaurHauls
Here's the anoter time:
May 30 01:16:12 srvalfresco systemd-timesyncd[643]: Network configuration changed, trying to establish connection.
May 30 01:16:12 srvalfresco systemd-networkd[895]: enp1s0: Configured
May 30 01:16:12 srvalfresco systemd-timesyncd[643]: Synchronized to time server 185.125.190.58:123 (ntp.ubuntu.com).
May 30 01:17:01 srvalfresco CRON[15202]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
May 30 08:06:31 srvalfresco kernel: [ 0.000000] Linux version 4.15.0-197-generic (buildd@lcy02-amd64-110) (gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04)) #208-Ubuntu SMP Tue Nov 1 17:23:37 UTC 2022 (Ubuntu 4.15.0-197.208-generic 4.15.18)
May 30 08:06:31 srvalfresco systemd-modules-load[421]: Inserted module 'iscsi_tcp'
May 30 08:06:31 srvalfresco systemd-modules-load[421]: Inserted module 'ib_iser'
May 30 08:06:31 srvalfresco systemd-modules-load[421]: Inserted module 'arp_tables'
May 30 08:06:31 srvalfresco systemd-modules-load[421]: Inserted module 'br_netfilter'
May 30 08:06:31 srvalfresco keyboard-setup.sh[422]: Não foi possível abrir arquivo /tmp/tmpkbd.LEzQc4
May 30 08:06:31 srvalfresco systemd[1]: Starting Flush Journal to Persistent Storage...
May 30 08:06:31 srvalfresco systemd[1]: Started udev Coldplug all Devices.
May 30 08:06:31 srvalfresco systemd[1]: Started udev Kernel Device Manager.
May 30 08:06:31 srvalfresco systemd-modules-load[421]: Inserted module 'ip6table_filter'
May 30 08:06:31 srvalfresco systemd-modules-load[421]: Inserted module 'iptable_filter'
May 30 08:06:31 srvalfresco systemd-modules-load[421]: Inserted module 'overlay'
May 30 08:06:31 srvalfresco systemd[1]: Started Load Kernel Modules.
May 30 08:06:31 srvalfresco systemd[1]: Mounting Kernel Configuration File System...
May 30 08:06:31 srvalfresco systemd[1]: Mounting FUSE Control File System...
May 30 08:06:31 srvalfresco systemd[1]: Starting Apply Kernel Variables...
May 30 08:06:31 srvalfresco systemd[1]: Mounted Kernel Configuration File System.
May 30 08:06:31 srvalfresco systemd[1]: Activated swap /swap.img.
May 30 08:06:31 srvalfresco systemd[1]: Mounted FUSE Control File System.
May 30 08:06:31 srvalfresco systemd[1]: Reached target Swap.
May 30 08:06:31 srvalfresco systemd[1]: Started Flush Journal to Persistent Storage.
May 30 08:06:31 srvalfresco systemd[1]: Started Apply Kernel Variables.
May 30 08:06:31 srvalfresco systemd-udevd[487]: link_config: autonegotiation is unset or enabled, the speed and duplex are not writable.
May 30 08:06:31 srvalfresco kernel: [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.15.0-197-generic root=UUID=0638a370-ef33-11e8-8751-525400655308 ro
May 30 08:06:31 srvalfresco kernel: [ 0.000000] KERNEL supported cpus:
May 30 08:06:31 srvalfresco kernel: [ 0.000000] Intel GenuineIntel
May 30 08:06:31 srvalfresco kernel: [ 0.000000] AMD AuthenticAMD
May 30 08:06:31 srvalfresco kernel: [ 0.000000] Centaur CentaurHauls
最后一次：
May 30 09:51:23 srvalfresco systemd-networkd[910]: enp1s0: Configured
May 30 09:51:24 srvalfresco systemd-timesyncd[651]: Synchronized to time server 185.125.190.57:123 (ntp.ubuntu.com).
May 30 10:17:01 srvalfresco CRON[5814]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
May 30 10:51:23 srvalfresco systemd-timesyncd[651]: Network configuration changed, trying to establish connection.
May 30 10:51:23 srvalfresco systemd-networkd[910]: enp1s0: Configured