fence_kdump - fencing agent for use with kdump crash recovery
service
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/
- -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
- off
- Power off machine.
- monitor
- Check the health of fence device
- metadata
- Display the XML metadata describing this resource.
- validate-all
- Validate if all required parameters are entered.
- 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