I have a PVE cluster including 4 host, they are running on 8.2.2 for 58 days, I check the 'system log' just found a 'reboot' (Jul 14 11:17:57) and nothing abnormal in context... Anyone can give me a hint how to move on as to trace the root cause?
Jul 14 09:35:47 host03 pveproxy[2670]: starting 1 worker(s)
Jul 14 09:35:47 host03 pveproxy[2670]: worker 943194 started
Jul 14 09:44:47 host03 smartd[1598]: Device: /dev/bus/0 [megaraid_disk_00] [SAT], SMART Usage Attribute: 190 Drive_Temperature changed from 75 to 74
Jul 14 09:46:22 host03 pvedaemon[922849]: <root@pam> successful auth for user 'root@pam'
Jul 14 09:58:57 host03 pveproxy[938729]: worker exit
Jul 14 09:58:57 host03 pveproxy[2670]: worker 938729 finished
Jul 14 09:58:57 host03 pveproxy[2670]: starting 1 worker(s)
Jul 14 09:58:57 host03 pveproxy[2670]: worker 953359 started
Jul 14 10:02:22 host03 pvedaemon[931629]: <root@pam> successful auth for user 'root@pam'
Jul 14 10:08:24 host03 pveproxy[939253]: worker exit
Jul 14 10:08:24 host03 pveproxy[2670]: worker 939253 finished
Jul 14 10:08:24 host03 pveproxy[2670]: starting 1 worker(s)
Jul 14 10:08:24 host03 pveproxy[2670]: worker 957528 started
Jul 14 10:14:47 host03 smartd[1598]: Device: /dev/sda [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 67 to 66
Jul 14 10:14:48 host03 smartd[1598]: Device: /dev/bus/0 [megaraid_disk_00] [SAT], SMART Usage Attribute: 190 Drive_Temperature changed from 74 to 75
Jul 14 10:14:48 host03 smartd[1598]: Device: /dev/bus/0 [megaraid_disk_01] [SAT], SMART Usage Attribute: 190 Drive_Temperature changed from 74 to 73
Jul 14 10:17:01 host03 CRON[961310]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Jul 14 10:17:02 host03 CRON[961311]: (root) CMD (cd / && run-parts --report /etc/cron.hourly)
Jul 14 10:17:02 host03 CRON[961310]: pam_unix(cron:session): session closed for user root
Jul 14 10:17:57 host03 pmxcfs[1974]: [dcdb] notice: data verification successful
Jul 14 10:18:22 host03 pvedaemon[922849]: <root@pam> successful auth for user 'root@pam'
Jul 14 10:29:48 host03 pveproxy[953359]: worker exit
Jul 14 10:29:48 host03 pveproxy[2670]: worker 953359 finished
Jul 14 10:29:48 host03 pveproxy[2670]: starting 1 worker(s)
Jul 14 10:29:48 host03 pveproxy[2670]: worker 966919 started
Jul 14 10:29:52 host03 pvedaemon[922849]: worker exit
Jul 14 10:29:52 host03 pvedaemon[2660]: worker 922849 finished
Jul 14 10:29:52 host03 pvedaemon[2660]: starting 1 worker(s)
Jul 14 10:29:52 host03 pvedaemon[2660]: worker 966995 started
Jul 14 10:29:58 host03 pvedaemon[902056]: worker exit
Jul 14 10:29:58 host03 pvedaemon[2660]: worker 902056 finished
Jul 14 10:29:58 host03 pvedaemon[2660]: starting 1 worker(s)
Jul 14 10:29:58 host03 pvedaemon[2660]: worker 966998 started
Jul 14 10:30:16 host03 pvedaemon[931629]: worker exit
Jul 14 10:30:16 host03 pvedaemon[2660]: worker 931629 finished
Jul 14 10:30:16 host03 pvedaemon[2660]: starting 1 worker(s)
Jul 14 10:30:16 host03 pvedaemon[2660]: worker 967145 started
Jul 14 10:34:22 host03 pvedaemon[966998]: <root@pam> successful auth for user 'root@pam'
Jul 14 10:39:22 host03 pveproxy[943194]: worker exit
Jul 14 10:39:22 host03 pveproxy[2670]: worker 943194 finished
Jul 14 10:39:22 host03 pveproxy[2670]: starting 1 worker(s)
Jul 14 10:39:22 host03 pveproxy[2670]: worker 971180 started
Jul 14 10:44:47 host03 smartd[1598]: Device: /dev/sda [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 66 to 67
Jul 14 10:44:47 host03 smartd[1598]: Device: /dev/bus/0 [megaraid_disk_00] [SAT], SMART Usage Attribute: 190 Drive_Temperature changed from 75 to 74
Jul 14 10:50:22 host03 pvedaemon[966995]: <root@pam> successful auth for user 'root@pam'
Jul 14 10:58:28 host03 pveproxy[957528]: worker exit
Jul 14 10:58:28 host03 pveproxy[2670]: worker 957528 finished
Jul 14 10:58:28 host03 pveproxy[2670]: starting 1 worker(s)
Jul 14 10:58:28 host03 pveproxy[2670]: worker 979541 started
Jul 14 11:04:17 host03 pveproxy[966919]: worker exit
Jul 14 11:04:17 host03 pveproxy[2670]: worker 966919 finished
Jul 14 11:04:17 host03 pveproxy[2670]: starting 1 worker(s)
Jul 14 11:04:17 host03 pveproxy[2670]: worker 982109 started
Jul 14 11:06:22 host03 pvedaemon[966998]: <root@pam> successful auth for user 'root@pam'
Jul 14 11:14:47 host03 smartd[1598]: Device: /dev/sda [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 67 to 66
Jul 14 11:14:47 host03 smartd[1598]: Device: /dev/bus/0 [megaraid_disk_00] [SAT], SMART Usage Attribute: 190 Drive_Temperature changed from 74 to 75
Jul 14 11:17:01 host03 CRON[987699]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Jul 14 11:17:01 host03 CRON[987700]: (root) CMD (cd / && run-parts --report /etc/cron.hourly)
Jul 14 11:17:01 host03 CRON[987699]: pam_unix(cron:session): session closed for user root
Jul 14 11:17:04 host03 chronyd[1890]: Can't synchronise: no selectable sources
Jul 14 11:17:57 host03 pmxcfs[1974]: [dcdb] notice: data verification successful
-- Reboot --
Jul 14 11:21:46 host03 kernel: Linux version 6.8.4-2-pve (build@proxmox) (gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40) #1 SMP PREEMPT_DYNAMIC PMX 6.8.4-2 (2024-04-10T17:36Z) ()
Jul 14 11:21:46 host03 kernel: Command line: BOOT_IMAGE=/boot/vmlinuz-6.8.4-2-pve root=/dev/mapper/pve-root ro quiet
Jul 14 11:21:46 host03 kernel: KERNEL supported cpus:
Jul 14 11:21:46 host03 kernel: Intel GenuineIntel
Jul 14 11:21:46 host03 kernel: AMD AuthenticAMD
Jul 14 11:21:46 host03 kernel: Hygon HygonGenuine
Jul 14 11:21:46 host03 kernel: Centaur CentaurHauls
Jul 14 11:21:46 host03 kernel: zhaoxin Shanghai
Jul 14 11:21:46 host03 kernel: BIOS-provided physical RAM map:
Jul 14 11:21:46 host03 kernel: BIOS-e820: [mem 0x0000000000000000-0x000000000009bfff] usable
Jul 14 11:21:46 host03 kernel: BIOS-e820: [mem 0x000000000009c000-0x000000000009ffff] reserved
Jul 14 11:21:46 host03 kernel: BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved
Jul 14 11:21:46 host03 kernel: BIOS-e820: [mem 0x0000000000100000-0x0000000067a32fff] usable
Jul 14 11:21:46 host03 kernel: BIOS-e820: [mem 0x0000000067a33000-0x000000006fa3afff] reserved
Jul 14 11:21:46 host03 kernel: BIOS-e820: [mem 0x000000006fa3b000-0x000000007a288fff] usable
Jul 14 11:21:46 host03 kernel: BIOS-e820: [mem 0x000000007a289000-0x000000007af0afff] reserved
Jul 14 11:21:46 host03 kernel: BIOS-e820: [mem 0x000000007af0b000-0x000000007b93afff] ACPI NVS
Jul 14 11:21:46 host03 kernel: BIOS-e820: [mem 0x000000007b93b000-0x000000007bab4fff] ACPI data
Jul 14 11:21:46 host03 kernel: BIOS-e820: [mem 0x000000007bab5000-0x000000007bae8fff] usable
Jul 14 09:35:47 host03 pveproxy[2670]: starting 1 worker(s)
Jul 14 09:35:47 host03 pveproxy[2670]: worker 943194 started
Jul 14 09:44:47 host03 smartd[1598]: Device: /dev/bus/0 [megaraid_disk_00] [SAT], SMART Usage Attribute: 190 Drive_Temperature changed from 75 to 74
Jul 14 09:46:22 host03 pvedaemon[922849]: <root@pam> successful auth for user 'root@pam'
Jul 14 09:58:57 host03 pveproxy[938729]: worker exit
Jul 14 09:58:57 host03 pveproxy[2670]: worker 938729 finished
Jul 14 09:58:57 host03 pveproxy[2670]: starting 1 worker(s)
Jul 14 09:58:57 host03 pveproxy[2670]: worker 953359 started
Jul 14 10:02:22 host03 pvedaemon[931629]: <root@pam> successful auth for user 'root@pam'
Jul 14 10:08:24 host03 pveproxy[939253]: worker exit
Jul 14 10:08:24 host03 pveproxy[2670]: worker 939253 finished
Jul 14 10:08:24 host03 pveproxy[2670]: starting 1 worker(s)
Jul 14 10:08:24 host03 pveproxy[2670]: worker 957528 started
Jul 14 10:14:47 host03 smartd[1598]: Device: /dev/sda [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 67 to 66
Jul 14 10:14:48 host03 smartd[1598]: Device: /dev/bus/0 [megaraid_disk_00] [SAT], SMART Usage Attribute: 190 Drive_Temperature changed from 74 to 75
Jul 14 10:14:48 host03 smartd[1598]: Device: /dev/bus/0 [megaraid_disk_01] [SAT], SMART Usage Attribute: 190 Drive_Temperature changed from 74 to 73
Jul 14 10:17:01 host03 CRON[961310]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Jul 14 10:17:02 host03 CRON[961311]: (root) CMD (cd / && run-parts --report /etc/cron.hourly)
Jul 14 10:17:02 host03 CRON[961310]: pam_unix(cron:session): session closed for user root
Jul 14 10:17:57 host03 pmxcfs[1974]: [dcdb] notice: data verification successful
Jul 14 10:18:22 host03 pvedaemon[922849]: <root@pam> successful auth for user 'root@pam'
Jul 14 10:29:48 host03 pveproxy[953359]: worker exit
Jul 14 10:29:48 host03 pveproxy[2670]: worker 953359 finished
Jul 14 10:29:48 host03 pveproxy[2670]: starting 1 worker(s)
Jul 14 10:29:48 host03 pveproxy[2670]: worker 966919 started
Jul 14 10:29:52 host03 pvedaemon[922849]: worker exit
Jul 14 10:29:52 host03 pvedaemon[2660]: worker 922849 finished
Jul 14 10:29:52 host03 pvedaemon[2660]: starting 1 worker(s)
Jul 14 10:29:52 host03 pvedaemon[2660]: worker 966995 started
Jul 14 10:29:58 host03 pvedaemon[902056]: worker exit
Jul 14 10:29:58 host03 pvedaemon[2660]: worker 902056 finished
Jul 14 10:29:58 host03 pvedaemon[2660]: starting 1 worker(s)
Jul 14 10:29:58 host03 pvedaemon[2660]: worker 966998 started
Jul 14 10:30:16 host03 pvedaemon[931629]: worker exit
Jul 14 10:30:16 host03 pvedaemon[2660]: worker 931629 finished
Jul 14 10:30:16 host03 pvedaemon[2660]: starting 1 worker(s)
Jul 14 10:30:16 host03 pvedaemon[2660]: worker 967145 started
Jul 14 10:34:22 host03 pvedaemon[966998]: <root@pam> successful auth for user 'root@pam'
Jul 14 10:39:22 host03 pveproxy[943194]: worker exit
Jul 14 10:39:22 host03 pveproxy[2670]: worker 943194 finished
Jul 14 10:39:22 host03 pveproxy[2670]: starting 1 worker(s)
Jul 14 10:39:22 host03 pveproxy[2670]: worker 971180 started
Jul 14 10:44:47 host03 smartd[1598]: Device: /dev/sda [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 66 to 67
Jul 14 10:44:47 host03 smartd[1598]: Device: /dev/bus/0 [megaraid_disk_00] [SAT], SMART Usage Attribute: 190 Drive_Temperature changed from 75 to 74
Jul 14 10:50:22 host03 pvedaemon[966995]: <root@pam> successful auth for user 'root@pam'
Jul 14 10:58:28 host03 pveproxy[957528]: worker exit
Jul 14 10:58:28 host03 pveproxy[2670]: worker 957528 finished
Jul 14 10:58:28 host03 pveproxy[2670]: starting 1 worker(s)
Jul 14 10:58:28 host03 pveproxy[2670]: worker 979541 started
Jul 14 11:04:17 host03 pveproxy[966919]: worker exit
Jul 14 11:04:17 host03 pveproxy[2670]: worker 966919 finished
Jul 14 11:04:17 host03 pveproxy[2670]: starting 1 worker(s)
Jul 14 11:04:17 host03 pveproxy[2670]: worker 982109 started
Jul 14 11:06:22 host03 pvedaemon[966998]: <root@pam> successful auth for user 'root@pam'
Jul 14 11:14:47 host03 smartd[1598]: Device: /dev/sda [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 67 to 66
Jul 14 11:14:47 host03 smartd[1598]: Device: /dev/bus/0 [megaraid_disk_00] [SAT], SMART Usage Attribute: 190 Drive_Temperature changed from 74 to 75
Jul 14 11:17:01 host03 CRON[987699]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Jul 14 11:17:01 host03 CRON[987700]: (root) CMD (cd / && run-parts --report /etc/cron.hourly)
Jul 14 11:17:01 host03 CRON[987699]: pam_unix(cron:session): session closed for user root
Jul 14 11:17:04 host03 chronyd[1890]: Can't synchronise: no selectable sources
Jul 14 11:17:57 host03 pmxcfs[1974]: [dcdb] notice: data verification successful
-- Reboot --
Jul 14 11:21:46 host03 kernel: Linux version 6.8.4-2-pve (build@proxmox) (gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40) #1 SMP PREEMPT_DYNAMIC PMX 6.8.4-2 (2024-04-10T17:36Z) ()
Jul 14 11:21:46 host03 kernel: Command line: BOOT_IMAGE=/boot/vmlinuz-6.8.4-2-pve root=/dev/mapper/pve-root ro quiet
Jul 14 11:21:46 host03 kernel: KERNEL supported cpus:
Jul 14 11:21:46 host03 kernel: Intel GenuineIntel
Jul 14 11:21:46 host03 kernel: AMD AuthenticAMD
Jul 14 11:21:46 host03 kernel: Hygon HygonGenuine
Jul 14 11:21:46 host03 kernel: Centaur CentaurHauls
Jul 14 11:21:46 host03 kernel: zhaoxin Shanghai
Jul 14 11:21:46 host03 kernel: BIOS-provided physical RAM map:
Jul 14 11:21:46 host03 kernel: BIOS-e820: [mem 0x0000000000000000-0x000000000009bfff] usable
Jul 14 11:21:46 host03 kernel: BIOS-e820: [mem 0x000000000009c000-0x000000000009ffff] reserved
Jul 14 11:21:46 host03 kernel: BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved
Jul 14 11:21:46 host03 kernel: BIOS-e820: [mem 0x0000000000100000-0x0000000067a32fff] usable
Jul 14 11:21:46 host03 kernel: BIOS-e820: [mem 0x0000000067a33000-0x000000006fa3afff] reserved
Jul 14 11:21:46 host03 kernel: BIOS-e820: [mem 0x000000006fa3b000-0x000000007a288fff] usable
Jul 14 11:21:46 host03 kernel: BIOS-e820: [mem 0x000000007a289000-0x000000007af0afff] reserved
Jul 14 11:21:46 host03 kernel: BIOS-e820: [mem 0x000000007af0b000-0x000000007b93afff] ACPI NVS
Jul 14 11:21:46 host03 kernel: BIOS-e820: [mem 0x000000007b93b000-0x000000007bab4fff] ACPI data
Jul 14 11:21:46 host03 kernel: BIOS-e820: [mem 0x000000007bab5000-0x000000007bae8fff] usable