kdump fails to dump across network in RHEL 7
Environment
- RHEL 7
- kdump
Issue
- kdump fails to dump via NFS, ssh, or iscsi
Resolution
-
Upgrade to
kexec-tools-2.0.4-32.el7_0.2or later from Errata RHBA-2014:0943 -
After upgrading kexec-tools, force kdump to be rebuilt:
touch /etc/kdump.conf
kdumpctl restart
Workaround
-
Modify
/etc/sysconfig/network-scripts/ifcfg-*- replace
IPADDR0withIPADDR - replace
GATEWAY0withGATEWAY - replace
NETMASK0withNETMASK - replace
PREFIX0withPREFIX
- replace
-
Force kdump to be rebuilt:
touch /etc/kdump.conf
kdumpctl restart
Root Cause
When using NetworkManager tools to configure a network, it uses IPADDR0, GATEWAY0, and
kdump expects the network address is defined in /etc/sysconfig/network-scripts/ifcfg-
Diagnostic Steps
grep IPADDR0 /etc/sysconfig/network-scripts/ifcfg-*
kdump doesn't understand IPADDR0.
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