fence_kdump man page

fence_kdump — fencing agent for use with kdump crash recovery service

Description

fence_kdump is an I/O fencing agent to be used with the kdump crash recovery service. When the fence_kdump agent is invoked, it will listen for a message from the failed node that acknowledges that the failed node it executing the kdump crash kernel. Note that fence_kdump is not a replacement for traditional fencing methods. The fence_kdump agent can only detect that a node has entered the kdump crash recovery service. This allows the kdump crash recovery service complete without being preempted by traditional power fencing methods.

Note: the "off" action listen for message from failed node that acknowledges node has entered kdump crash recovery service. If a valid message is received from the failed node, the node is considered to be fenced and the agent returns success. Failure to receive a valid message from the failed node in the given timeout period results in fencing failure.

fence_kdump accepts options on the command line as well as from stdin. Fenced sends parameters through stdin when it execs the agent. fence_kdump can be run by itself with command line options.  This is useful for testing and for turning outlets on or off from scripts.

Vendor URL: http://www.kernel.org/pub/linux/utils/kernel/kexec/

Parameters

-n, --nodename=NODE

Name or IP address of node to be fenced. This option is required for the "off" action.

-p, --ipport=PORT

IP port number that the fence_kdump agent will use to listen for messages. (Default Value: 7410)

-f, --family=FAMILY

IP network family. Force the fence_kdump agent to use a specific family. The value for FAMILY can be "auto", "ipv4", or "ipv6". (Default Value: auto)

-o, --action=ACTION

Fencing action to perform. The value for ACTION can be either "off" or "metadata". (Default Value: off)

-t, --timeout=TIMEOUT

Number of seconds to wait for message from failed node. If no message is received within TIMEOUT seconds, the fence_kdump agent returns failure. (Default Value: 60)

-v, --verbose

Print verbose output

-V, --version

Print version

-h, --help

Print usage

Actions

off

Power off machine.

monitor

Check the health of fence device

metadata

Display the XML metadata describing this resource.

Stdin Parameters

nodename

Name or IP address of node to be fenced. This option is required for the "off" action.

ipport

IP port number that the fence_kdump agent will use to listen for messages. (Default Value: 7410)

family

IP network family. Force the fence_kdump agent to use a specific family. The value for FAMILY can be "auto", "ipv4", or "ipv6". (Default Value: auto)

action

Fencing action to perform. The value for ACTION can be either "off" or "metadata". (Default Value: off)

timeout

Number of seconds to wait for message from failed node. If no message is received within TIMEOUT seconds, the fence_kdump agent returns failure. (Default Value: 60)

verbose

Print verbose output

version

Print version

usage

Print usage

Referenced By

fence_kdump_send(8).

2009-10-20 fence_kdump (Fence Agent)