fence_mpath - Fence agent for multipath persistent reservation
fence_mpath is an I/O fencing agent that uses SCSI-3 persistent
reservations to control access multipath devices. Underlying devices must
support SCSI-3 persistent reservations (SPC-3 or greater) as well as the
"preempt-and-abort" subcommand. The fence_mpath agent works by
having a unique key for each node that has to be set in /etc/multipath.conf.
Once registered, a single node will become the reservation holder by
creating a "write exclusive, registrants only" reservation on the
device(s). The result is that only registered nodes may write to the
device(s). When a node failure occurs, the fence_mpath agent will remove the
key belonging to the failed node from the device(s). The failed node will no
longer be able to write to the device(s). A manual reboot is required.
fence_mpath accepts options on the command line as well as from
stdin. Fenced sends parameters through stdin when it execs the agent.
fence_mpath 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: https://www.sourceware.org/dm/
- -o,
--action=[action]
- Fencing action (Default Value: off)
- -d,
--devices=[devices]
- List of devices to use for current operation. Devices can be
comma-separated list of device-mapper multipath devices (eg.
/dev/mapper/3600508b400105df70000e00000ac0000 or /dev/mapper/mpath1). Each
device must support SCSI-3 persistent reservations.
- -k, --key=[key]
- Key to use for the current operation. This key should be unique to a node
and have to be written in /etc/multipath.conf. For the "on"
action, the key specifies the key use to register the local node. For the
"off" action, this key specifies the key to be removed from the
device(s). This parameter is always required.
- -q, --quiet
- Disable logging to stderr. Does not affect --verbose or --debug-file or
logging to syslog.
- -v, --verbose
- Verbose mode
- -D,
--debug-file=[debugfile]
- Write debug information to given file
- -V, --version
- Display version information and exit
- -h, --help
- Display help and exit
- --delay=[seconds]
- Wait X seconds before fencing is started (Default Value: 0)
- --login-timeout=[seconds]
- Wait X seconds for cmd prompt after login (Default Value: 5)
- --mpathpersist-path=[path]
- Path to mpathpersist binary (Default Value: /usr/sbin/mpathpersist)
- --power-timeout=[seconds]
- Test X seconds for status change after ON/OFF (Default Value: 20)
- --power-wait=[seconds]
- Wait X seconds after issuing ON/OFF (Default Value: 0)
- --shell-timeout=[seconds]
- Wait X seconds for cmd prompt after issuing command (Default Value: 3)
- --store-path=[path]
- Path to directory where fence agent can store information (Default Value:
/var/run/cluster)
- --retry-on=[attempts]
- Count of attempts to retry power on (Default Value: 1)
- --use-sudo
- Use sudo (without password) when calling 3rd party software
- --sudo-path=[path]
- Path to sudo binary (Default Value: /usr/bin/sudo)
- on
- Power on machine.
- off
- Power off machine.
- status
- This returns the status of the plug/virtual machine.
- monitor
- Check the health of fence device
- metadata
- Display the XML metadata describing this resource.
- manpage
-
The operational behavior of this is not known.
- validate-all
- Validate if all required parameters are entered.
- action
- Fencing action (Default Value: off)
- devices
- List of devices to use for current operation. Devices can be
comma-separated list of device-mapper multipath devices (eg.
/dev/mapper/3600508b400105df70000e00000ac0000 or /dev/mapper/mpath1). Each
device must support SCSI-3 persistent reservations.
- key
- Key to use for the current operation. This key should be unique to a node
and have to be written in /etc/multipath.conf. For the "on"
action, the key specifies the key use to register the local node. For the
"off" action, this key specifies the key to be removed from the
device(s). This parameter is always required.
- quiet
- Disable logging to stderr. Does not affect --verbose or --debug-file or
logging to syslog.
- verbose
- Verbose mode
- debug_file
- Write debug information to given file Obsoletes: debug
- version
- Display version information and exit
- help
- Display help and exit
- delay
- Wait X seconds before fencing is started (Default Value: 0)
- login_timeout
- Wait X seconds for cmd prompt after login (Default Value: 5)
- mpathpersist_path
- Path to mpathpersist binary (Default Value: /usr/sbin/mpathpersist)
- power_timeout
- Test X seconds for status change after ON/OFF (Default Value: 20)
- power_wait
- Wait X seconds after issuing ON/OFF (Default Value: 0)
- shell_timeout
- Wait X seconds for cmd prompt after issuing command (Default Value: 3)
- store_path
- Path to directory where fence agent can store information (Default Value:
/var/run/cluster)
- retry_on
- Count of attempts to retry power on (Default Value: 1)
- use_sudo
- Use sudo (without password) when calling 3rd party software Obsoletes:
sudo
- sudo_path
- Path to sudo binary (Default Value: /usr/bin/sudo)