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ocf_heartbeat_sfex: Manages exclusive access to shared storage using Shared Disk File EXclusiveness (SF-EX)


ocf_heartbeat_sfex - Manages exclusive access to shared storage using Shared Disk File EXclusiveness (SF-EX)


sfex [start | stop | monitor | meta-data | validate-all]


Resource script for SF-EX. It manages a shared storage medium exclusively .
device Block 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. .sp lock_timeout = monitor_interval + "The expiration time of the lock" .sp 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. .sp The lock timeout have an impact on start action timeout because start action timeout value is calculated by the following formula. .sp start timeout = collision_timeout + lock_timeout + "safety margin" .sp The "safety margin" is decided within the range of about 10-20 seconds(It depends on your system requirement). (optional, integer, default 100)
This resource agent supports the following actions (operations): start Starts 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.


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"




Linux-HA contributors (see the resource agent source for information about individual OCF_HEARTBEAT_SFEX(7)

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