OCF_HEARTBEAT_ETHMON(7) 					OCF resource agents					   OCF_HEARTBEAT_ETHMON(7)

NAME

       ocf_heartbeat_ethmonitor - Monitors network interfaces

SYNOPSIS

       ethmonitor [start | stop | status | monitor | meta-data | validate-all]

DESCRIPTION

       Monitor the vitality of a local network interface.

       You may set up this RA as a clone resource to monitor the network interfaces on different nodes, with the same interface name. This is not
       related to the IP address or the network on which a interface is configured. You may use this RA to move resources away from a node, which
       has a faulty interface or prevent moving resources to such a node. This gives you independend control of the resources, without involving
       cluster intercommunication. But it requires your nodes to have more than one network interface.

       The resource configuration requires a monitor operation, because the monitor does the main part of the work. In addition to the resource
       configuration, you need to configure some location constraints, based on a CIB attribute value. The name of the attribute value is
       configured in the 'name' option of this RA.

       Example constraint configuration: location loc_connected_node my_resource_grp rule ="rule_loc_connected_node" -INF: ethmonitor eq 0

       The ethmonitor works in 3 different modes to test the interface vitality. 1. call ip to see if the link status is up (if link is down ->
       error) 2. call ip and watch the RX counter (if packages come around in a certain time -> success) 3. call arping to check whether any of
       the IPs found in the local ARP cache answers an ARP REQUEST (one answer -> success) 4. return error

SUPPORTED PARAMETERS

       interface
	   The name of the network interface which should be monitored (e.g. eth0).

	   (unique, required, string, no default)

       name
	   The name of the CIB attribute to set. This is the name to be used in the constraints. Defaults to "ethmonitor-'interface_name'".

	   (unique, optional, string, no default)

       multiplier
	   Multiplier for the value of the CIB attriobute specified in parameter name.

	   (optional, integer, default 1)

       repeat_count
	   Specify how often the interface will be monitored, before the status is set to failed. You need to set the timeout of the monitoring
	   operation to at least repeat_count * repeat_interval

	   (optional, integer, default 5)

       repeat_interval
	   Specify how long to wait in seconds between the repeat_counts.

	   (optional, integer, default 10)

       pktcnt_timeout
	   Timeout for the RX packet counter. Stop listening for packet counter changes after the given number of seconds.

	   (optional, integer, default 5)

       arping_count
	   Number of ARP REQUEST packets to send for every IP. Usually one ARP REQUEST (arping) is send

	   (optional, integer, default 1)

       arping_timeout
	   Time in seconds to wait for ARP REQUESTs (all packets of arping_count). This is to limit the time for arp requests, to be able to send
	   requests to more than one node, without running in the monitor operation timeout.

	   (optional, integer, default 1)

       arping_cache_entries
	   Maximum number of IPs from ARP cache list to check for ARP REQUEST (arping) answers. Newest entries are tried first.

	   (optional, integer, default 5)

SUPPORTED ACTIONS

       This resource agent supports the following actions (operations):

       start
	   Starts the resource. Suggested minimum timeout: 20s.

       stop
	   Stops the resource. Suggested minimum timeout: 20s.

       status
	   Performs a status check. Suggested minimum timeout: 20s. Suggested interval: 10s.

       monitor
	   Performs a detailed status check. Suggested minimum timeout: 20s. 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: 20s.

EXAMPLE

       The following is an example configuration for a ethmonitor resource using the crm(8) shell:

	   primitive p_ethmonitor ocf:heartbeat:ethmonitor 
	     params 
	       interface=string 
	     op monitor depth="0" timeout="20s" interval="10s"

SEE ALSO

       http://www.linux-ha.org/wiki/ethmonitor_(resource_agent)

AUTHOR

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

resource-agents UNKNOWN 					    06/09/2014						   OCF_HEARTBEAT_ETHMON(7)