fence_kdump (8) Linux Manual Page

fence_kdump – fencing agent for use with kdump crash recovery service

Synopsis

fence_kdump [OPTIONS]…

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.

Options

-n, –nodename=NODE

Name or IP address of node to be fenced. This option is required for the "off" action. (default: none)

-p, –ipport=PORT

IP port number that the fence_kdump agent will use to listen for messages. (default: 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: auto)

-o, –action=ACTION

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

-t, –timeout=TIMEOUT

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

-v, –verbose

Print verbose output.

-V, –version

Print version and exit.

-h, –help

Print usage and exit.

Stdin Parameters

These parameters are passed to fence_kdump via standard input if no command-line options are present.

nodename=NODE

Name or IP address of node to be fenced. This option is required for the "off" action. (default: none)

ipport=PORT

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

action=ACTION

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

timeout=TIMEOUT

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

Actions

off

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.

metadata

Print XML metadata to standard output.

Author

Ryan O’Hara <rohara [at] redhat.com>

See Also

fence_kdump_send(8), fenced(8), fence_node(8)