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OCF_HEARTBEAT_SFEX(7) | OCF resource agents | OCF_HEARTBEAT_SFEX(7) |
NAME¶
ocf_heartbeat_sfex - Manages exclusive access to shared storage using Shared Disk File EXclusiveness (SF-EX)SYNOPSIS¶
sfex [start | stop | monitor | meta-data |
validate-all]
DESCRIPTION¶
Resource script for SF-EX. It manages a shared storage medium exclusively .SUPPORTED PARAMETERS¶
deviceBlock device path that stores exclusive control data.
(required, string, no default)
index
Location in block device where exclusive control data is
stored. 1 or more is specified. Default is 1.
(optional, integer, default 1)
collision_timeout
Waiting time when a collision of lock acquisition is
detected. Default is 1 second.
(optional, integer, default 1)
monitor_interval
Monitor interval(sec). Default is 10 seconds
(optional, integer, default 10)
lock_timeout
Valid term of lock(sec). Default is 100 seconds. The
lock_timeout is calculated by the following formula.
lock_timeout = monitor_interval + "The expiration time of the lock"
We suggest 90 seconds as a default value of the "The expiration time of the
lock", but you should change it in consideration of access delay to the
shared disk and the switch time of the multipath driver.
The lock timeout have an impact on start action timeout because start action
timeout value is calculated by the following formula.
start timeout = collision_timeout + lock_timeout + "safety margin"
The "safety margin" is decided within the range of about 10-20
seconds(It depends on your system requirement).
(optional, integer, default 100)
SUPPORTED ACTIONS¶
This resource agent supports the following actions (operations): startStarts the resource. Suggested minimum timeout:
120s.
stop
Stops the resource. Suggested minimum timeout: 20s.
monitor
Performs a detailed status check. Suggested minimum
timeout: 10s. Suggested interval: 10s.
meta-data
Retrieves resource agent metadata (internal use only).
Suggested minimum timeout: 5s.
validate-all
Performs a validation of the resource configuration.
Suggested minimum timeout: 5s.
EXAMPLE¶
The following is an example configuration for a sfex resource using the crm(8) shell:primitive p_sfex ocf:heartbeat:sfex \ params \ device= string \ op monitor depth="0" timeout="10s" interval="10s"
SEE ALSO¶
http://www.linux-ha.org/wiki/sfex_(resource_agent)AUTHOR¶
Linux-HA contributors (see the resource agent source for information about individual authors)02/21/2014 | resource-agents UNKNOWN |