Remote Kernel Crash Dumps using the NFS protocol from the Ubuntu Server Guide by OnWorks

6.4.3. Remote Kernel Crash Dumps using the NFS protocol

To enable remote dumps using the NFS protocol, the /etc/default/kdump-tools must be modified in the following manner :

# NFS - Hostname and mount point of the NFS server configured to receive

# the crash dump. The syntax must be {HOSTNAME}:{MOUNTPOINT}

# (e.g. remote:/var/crash)

#

NFS="kdump-netcrash:/var/crash"

As with the SSH protocol, the HOSTTAG variable can be used to replace the IP address by the hostname as the prefix of the remote directory.

The kdump-config show command can be used to confirm that kdump is correctly configured to use the NFS protocol :

kdump-config show

DUMP_MODE: kdump

USE_KDUMP: 1

KDUMP_SYSCTL: kernel.panic_on_oops=1 KDUMP_COREDIR: /var/crash

crashkernel addr: 0x2c000000

/var/lib/kdump/vmlinuz: symbolic link to /boot/vmlinuz-4.4.0-10-generic kdump initrd:

/var/lib/kdump/initrd.img: symbolic link to /var/lib/kdump/initrd.img-4.4.0-10-generic

NFS: kdump-netcrash:/var/crash

HOSTTAG: hostname current state: ready to kdump