Configure kdump.conf for nfs: "nfs 192.168.4.1:/mnt/remotenfs", and
use fs option "noauot" in fstab, i.e. "192.168.4.1:/mnt/remotenfs /mnt/nfs
nfs noauto 0 0",
then mount the nfs report "mount /mnt/nfs".
Rebuild kdumpinitrd and trigger crash: "echo c > /proc/sysrq-tirgger", kdump
fail.
In non-root disk dump, it has the same problem. Root dump is ok.
Because "noauot" option will fail kdump.
Check rebuild kdumpinitrd file:
"lsinitrd /boot/initramfs-$(uname -r)kdump.img /etc/fstab", and will
got "192.168.122.4.1:/mnt/remotenfs /kdumproot//mnt/nfs nfs4 noauto 0 2".
According to Baoquan He and Minfei Huang suggestions, remove "noauto"
option in 2nd kernel fstab. And I have test patch in my kvm guest, the patch works well.
Signed-off-by: Qiao Zhao <qzhao(a)dhcp-12-144.nay.redhat.com>
---
mkdumprd | 2 ++
1 file changed, 2 insertions(+)
diff --git a/mkdumprd b/mkdumprd
index 4d251ba..385998d 100644
--- a/mkdumprd
+++ b/mkdumprd
@@ -114,6 +114,8 @@ to_mount() {
_fstype=$(findmnt -k -f -n -r -o FSTYPE $_dev)
_options=$(findmnt --fstab -f -n -r -o OPTIONS $_dev)
[ -z "$_options" ] && _options=$(findmnt -k -f -n -r -o OPTIONS
$_dev)
+ #noauto options will fail nfs dump, remove "noauto" in 2nd kernel fstab.
+ [[ $_options =~ "noauto" ]] && _options=$(echo $_options | sed
's/noauto//')
_options=${_options/#ro/rw} #mount fs target as rw in 2nd kernel
# "x-initrd.mount" mount failure will trigger isolate emergency service
# W/o this, systemd won't isolate, thus we won't get to emergency.
--
1.9.3