Hi,
Our instance(i-0acf52896afa35c0f) August 25 morning 08:29 (UTC+8) after the automatic restart is still inaccessible, We restored it to normal at 08:36 after a manual reboot at the console, but the system log(/var/log/message,dmesg) found no errors.
>last reboot
reboot system boot Thu Aug 25 08:36 - 17:05 (5+08:28)
reboot system boot Thu Aug 25 08:29 - 17:05 (5+08:35)
# /var/log/message snippet
Aug 25 08:20:34 ip- nm-dispatcher: req:1 'dhcp4-change' [eth0]: start running ordered scripts...
Aug 25 08:22:28 ip- dhclient[471465]: DHCPDISCOVER on docker0 to 255.255.255.255 port 67 interval 3 (xid=0x343ac688)
Aug 25 08:22:31 ip- dhclient[471465]: DHCPDISCOVER on docker0 to 255.255.255.255 port 67 interval 5 (xid=0x343ac688)
Aug 25 08:22:36 ip- dhclient[471465]: DHCPDISCOVER on docker0 to 255.255.255.255 port 67 interval 7 (xid=0x343ac688)
Aug 25 08:22:43 ip- dhclient[471465]: DHCPDISCOVER on docker0 to 255.255.255.255 port 67 interval 18 (xid=0x343ac688)
Aug 25 08:22:57 ip- dhclient[471465]: DHCPREQUEST on eth0 to x.x.x.x port 67 (xid=0x71963ea7)
Aug 25 08:22:57 ip- dhclient[471465]: DHCPACK from x.x.x.x (xid=0x71963ea7)
Aug 25 08:36:41 ip- journal: Runtime journal is using 8.0M (max allowed 743.7M, trying to leave 1.0G free of 7.2G available → current limit 743.7M).
Aug 25 08:36:41 ip- kernel: Initializing cgroup subsys cpuset
Aug 25 08:36:41 ip- kernel: Initializing cgroup subsys cpu
Aug 25 08:36:41 ip- kernel: Initializing cgroup subsys cpuacct
We found a instance and system status check error in cloudwatch starting at 08:24.
CloudTrail only has records of our manual restart instances at 08:36.
I would really appreciate some help.