Not able to save crash dump using kdump
I have a VPS server on amazon's AWS Lightsail service.
I've been testing kdump using the following two commands(to trigger an automatic kernel crash):
# echo 1 > /proc/sys/kernel/sysrq
# echo c > /proc/sysrq-trigger
The problem is that the system crashed and rebooted, but there's no dump saved.
Here is a list of checking I've done:
[centos@server crash]$ systemctl status kdump
● kdump.service - Crash recovery kernel arming
Loaded: loaded (/usr/lib/systemd/system/kdump.service; enabled; vendor preset: enabled)
Active: active (exited) since Mon 2019-03-18 07:43:34 UTC; 5 days ago
Process: 4119 ExecStart=/usr/bin/kdumpctl start (code=exited, status=0/SUCCESS)
Main PID: 4119 (code=exited, status=0/SUCCESS)
CGroup: /system.slice/kdump.service
Mar 18 07:43:32 ip-.ap-northeast-1.compute.internal systemd[1]: Starting Crash recovery kernel arming...
Mar 18 07:43:34 ip-.ap-northeast-1.compute.internal kdumpctl[4119]: kexec: loaded kdump kernel
Mar 18 07:43:34 ip-.ap-northeast-1.compute.internal kdumpctl[4119]: Starting kdump: [OK]
Mar 18 07:43:34 ip-.ap-northeast-1.compute.internal systemd[1]: Started Crash recovery kernel arming.
[centos@server crash]$ dmesg | grep Reserving
[ 0.000000] Reserving 256MB of memory at 368MB for crashkernel (System RAM: 2047MB)
[centos@server crash]$ cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-3.10.0-957.1.3.el7.x86_64 root=UUID=f41e390f-835b-4223-a9bb-9b45984ddf8d ro console=tty0 crashkernel=256M console=ttyS0,115200
[centos@server crash]$ grep -v ^# /etc/kdump.conf
path /var/crash
core_collector makedumpfile -l --message-level 1 -d 31
default reboot
There's no log of the crash in the /var/log/messages indicating any error there might be. So I wonder what I might have missed. Or an AWS Lightsail VPS is not capable of saving a kdump at all...?
Thank you so much in advance.
centos aws crash core-dump kdump
asked 11 mins ago
xczzhhxczzhh
2093510
add a comment |
I have a VPS server on amazon's AWS Lightsail service.
I've been testing kdump using the following two commands(to trigger an automatic kernel crash):
# echo 1 > /proc/sys/kernel/sysrq
# echo c > /proc/sysrq-trigger
The problem is that the system crashed and rebooted, but there's no dump saved.
Here is a list of checking I've done:
[centos@server crash]$ systemctl status kdump
● kdump.service - Crash recovery kernel arming
Loaded: loaded (/usr/lib/systemd/system/kdump.service; enabled; vendor preset: enabled)
Active: active (exited) since Mon 2019-03-18 07:43:34 UTC; 5 days ago
Process: 4119 ExecStart=/usr/bin/kdumpctl start (code=exited, status=0/SUCCESS)
Main PID: 4119 (code=exited, status=0/SUCCESS)
CGroup: /system.slice/kdump.service
Mar 18 07:43:32 ip-.ap-northeast-1.compute.internal systemd[1]: Starting Crash recovery kernel arming...
Mar 18 07:43:34 ip-.ap-northeast-1.compute.internal kdumpctl[4119]: kexec: loaded kdump kernel
Mar 18 07:43:34 ip-.ap-northeast-1.compute.internal kdumpctl[4119]: Starting kdump: [OK]
Mar 18 07:43:34 ip-.ap-northeast-1.compute.internal systemd[1]: Started Crash recovery kernel arming.
[centos@server crash]$ dmesg | grep Reserving
[ 0.000000] Reserving 256MB of memory at 368MB for crashkernel (System RAM: 2047MB)
[centos@server crash]$ cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-3.10.0-957.1.3.el7.x86_64 root=UUID=f41e390f-835b-4223-a9bb-9b45984ddf8d ro console=tty0 crashkernel=256M console=ttyS0,115200
[centos@server crash]$ grep -v ^# /etc/kdump.conf
path /var/crash
core_collector makedumpfile -l --message-level 1 -d 31
default reboot
There's no log of the crash in the /var/log/messages indicating any error there might be. So I wonder what I might have missed. Or an AWS Lightsail VPS is not capable of saving a kdump at all...?
Thank you so much in advance.
centos aws crash core-dump kdump
asked 11 mins ago
xczzhhxczzhh
2093510
add a comment |
I have a VPS server on amazon's AWS Lightsail service.
I've been testing kdump using the following two commands(to trigger an automatic kernel crash):
# echo 1 > /proc/sys/kernel/sysrq
# echo c > /proc/sysrq-trigger
The problem is that the system crashed and rebooted, but there's no dump saved.
Here is a list of checking I've done:
[centos@server crash]$ systemctl status kdump
● kdump.service - Crash recovery kernel arming
Loaded: loaded (/usr/lib/systemd/system/kdump.service; enabled; vendor preset: enabled)
Active: active (exited) since Mon 2019-03-18 07:43:34 UTC; 5 days ago
Process: 4119 ExecStart=/usr/bin/kdumpctl start (code=exited, status=0/SUCCESS)
Main PID: 4119 (code=exited, status=0/SUCCESS)
CGroup: /system.slice/kdump.service
Mar 18 07:43:32 ip-.ap-northeast-1.compute.internal systemd[1]: Starting Crash recovery kernel arming...
Mar 18 07:43:34 ip-.ap-northeast-1.compute.internal kdumpctl[4119]: kexec: loaded kdump kernel
Mar 18 07:43:34 ip-.ap-northeast-1.compute.internal kdumpctl[4119]: Starting kdump: [OK]
Mar 18 07:43:34 ip-.ap-northeast-1.compute.internal systemd[1]: Started Crash recovery kernel arming.
[centos@server crash]$ dmesg | grep Reserving
[ 0.000000] Reserving 256MB of memory at 368MB for crashkernel (System RAM: 2047MB)
[centos@server crash]$ cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-3.10.0-957.1.3.el7.x86_64 root=UUID=f41e390f-835b-4223-a9bb-9b45984ddf8d ro console=tty0 crashkernel=256M console=ttyS0,115200
[centos@server crash]$ grep -v ^# /etc/kdump.conf
path /var/crash
core_collector makedumpfile -l --message-level 1 -d 31
default reboot
There's no log of the crash in the /var/log/messages indicating any error there might be. So I wonder what I might have missed. Or an AWS Lightsail VPS is not capable of saving a kdump at all...?
Thank you so much in advance.
centos aws crash core-dump kdump
asked 11 mins ago
xczzhhxczzhh
2093510
I have a VPS server on amazon's AWS Lightsail service.
I've been testing kdump using the following two commands(to trigger an automatic kernel crash):
# echo 1 > /proc/sys/kernel/sysrq
# echo c > /proc/sysrq-trigger
The problem is that the system crashed and rebooted, but there's no dump saved.
Here is a list of checking I've done:
[centos@server crash]$ systemctl status kdump
● kdump.service - Crash recovery kernel arming
Loaded: loaded (/usr/lib/systemd/system/kdump.service; enabled; vendor preset: enabled)
Active: active (exited) since Mon 2019-03-18 07:43:34 UTC; 5 days ago
Process: 4119 ExecStart=/usr/bin/kdumpctl start (code=exited, status=0/SUCCESS)
Main PID: 4119 (code=exited, status=0/SUCCESS)
CGroup: /system.slice/kdump.service
Mar 18 07:43:32 ip-.ap-northeast-1.compute.internal systemd[1]: Starting Crash recovery kernel arming...
Mar 18 07:43:34 ip-.ap-northeast-1.compute.internal kdumpctl[4119]: kexec: loaded kdump kernel
Mar 18 07:43:34 ip-.ap-northeast-1.compute.internal kdumpctl[4119]: Starting kdump: [OK]
Mar 18 07:43:34 ip-.ap-northeast-1.compute.internal systemd[1]: Started Crash recovery kernel arming.
[centos@server crash]$ dmesg | grep Reserving
[ 0.000000] Reserving 256MB of memory at 368MB for crashkernel (System RAM: 2047MB)
[centos@server crash]$ cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-3.10.0-957.1.3.el7.x86_64 root=UUID=f41e390f-835b-4223-a9bb-9b45984ddf8d ro console=tty0 crashkernel=256M console=ttyS0,115200
[centos@server crash]$ grep -v ^# /etc/kdump.conf
path /var/crash
core_collector makedumpfile -l --message-level 1 -d 31
default reboot
There's no log of the crash in the /var/log/messages indicating any error there might be. So I wonder what I might have missed. Or an AWS Lightsail VPS is not capable of saving a kdump at all...?
Thank you so much in advance.
centos aws crash core-dump kdump
centos aws crash core-dump kdump
asked 11 mins ago
xczzhhxczzhh
2093510
asked 11 mins ago
xczzhhxczzhh
2093510
asked 11 mins ago
xczzhhxczzhh
2093510
asked 11 mins ago
xczzhhxczzhh
2093510
asked 11 mins ago
xczzhhxczzhh
2093510
2093510
add a comment |
add a comment |
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