There doesn't seem to be any documentation for enabling crash dumps in debian, and what I've cobbled together does not seem to be working.
The wiki suggests using netconsole. However, this does not work for me either:
Any help is appreciated.
Code:
# cat /etc/default/kexec
# Defaults for kexec initscript
# sourced by /etc/init.d/kexec and /etc/init.d/kexec-load
# Load a kexec kernel (true/false)
LOAD_KEXEC=true
# Kernel and initrd image
KERNEL_IMAGE="/boot/vmlinuz-4.4.6-1-pve"
INITRD="/boot/initrd.img-4.4.6-1-pve"
# If empty, use current /proc/cmdline
APPEND=""
# Load the default kernel from grub config (true/false)
USE_GRUB_CONFIG=false
Code:
# cat /etc/default/grub
# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
# info -f grub -n 'Simple configuration'
GRUB_DEFAULT=0
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="Proxmox Virtual Environment"
GRUB_CMDLINE_LINUX_DEFAULT="crashkernel=128M"
GRUB_CMDLINE_LINUX="root=ZFS=rpool/ROOT/pve-1 boot=zfs crashkernel=128M nmi_watchdog=1"
# Disable os-prober, it might add menu entries for each guest
# root FS on a local partition
GRUB_DISABLE_OS_PROBER=true
Code:
# cat /etc/default/kdump-tools
# kdump-tools configuration
# ---------------------------------------------------------------------------
# USE_KDUMP - controls kdump will be configured
# 0 - kdump kernel will not be loaded
# 1 - kdump kernel will be loaded and kdump is configured
# KDUMP_SYSCTL - controls when a panic occurs, using the sysctl
# interface. The contents of this variable should be the
# "variable=value ..." portion of the 'sysctl -w ' command.
# If not set, the default value "kernel.panic_on_oops=1" will
# be used. Disable this feature by setting KDUMP_SYSCTL=" "
# Example - also panic on oom:
# KDUMP_SYSCTL="kernel.panic_on_oops=1 vm.panic_on_oom=1"
#
USE_KDUMP=1
KDUMP_SYSCTL="kernel.panic_on_oops=1"
# ---------------------------------------------------------------------------
# Kdump Kernel:
# KDUMP_KERNEL - A full pathname to a kdump kernel.
# KDUMP_INITRD - A full pathname to the kdump initrd (if used).
# If these are not set, kdump-config will try to use the current kernel
# and initrd if it is relocatable. Otherwise, you will need to specify
# these manually.
#KDUMP_KERNEL=
#KDUMP_INITRD=
# ---------------------------------------------------------------------------
# vmcore Handling:
# KDUMP_COREDIR - local path to save the vmcore to.
# KDUMP_FAIL_CMD - This variable can be used to cause a reboot or
# start a shell if saving the vmcore fails. If not set, "reboot -f"
# is the default.
# Example - start a shell if the vmcore copy fails:
# KDUMP_FAIL_CMD="echo 'makedumpfile FAILED.'; /bin/bash; reboot -f"
KDUMP_COREDIR="/var/crash"
KDUMP_FAIL_CMD="reboot -f"
# ---------------------------------------------------------------------------
# Makedumpfile options:
# DEBUG_KERNEL - a debug version of the running kernel. If not set,
# kdump-config will use /usr/lib/debug/vmlinux-$(uname -r) if it is
# available. If it is not available, makedumpfile will be limited to
# dumping all pages in memory.
# MAKEDUMP_ARGS - extra arguments passed to makedumpfile (8). The default,
# if unset, is to pass '-c -d 31' telling makedumpfile to use compression
# and reduce the corefile to in-use kernel pages only.
#DEBUG_KERNEL=
#MAKEDUMP_ARGS="-c -d 31"
# ---------------------------------------------------------------------------
# Kexec/Kdump args
# KDUMP_KEXEC_ARGS - Additional arguments to the kexec command used to load
# the kdump kernel
# Example - Use this option on x86 systems with PAE and more than
# 4 gig of memory:
# KDUMP_KEXEC_ARGS="--elf64-core-headers"
# KDUMP_CMDLINE - The default is to use the contents of /proc/cmdline.
# Set this variable to override /proc/cmdline.
# KDUMP_CMDLINE_APPEND - Additional arguments to append to the command line
# for the kdump kernel. If unset, it defaults to "irqpoll maxcpus=1 nousb"
#KDUMP_KEXEC_ARGS=""
#KDUMP_CMDLINE=""
#KDUMP_CMDLINE_APPEND="irqpoll maxcpus=1 nousb systemd.unit=kdump-tools.service"
# --------------------------------------------The wiki suggests using netconsole. However, this does not work for me either:
Code:
# modprobe netconsole netconsole=@10.5.0.250/,@10.5.0.251/
modprobe: ERROR: could not insert 'netconsole': Device or resource busyAny help is appreciated.
Last edited:
