On 5/9/07, benjamin <[EMAIL PROTECTED]> wrote:
Hi,
I see here, http://www.linux-ha.org/ClusterInformationBase/Actions, that we
can set different interval and paramters to a monitor but is it possible to
have two (or more) monitors for a same resource ?
For example : is it possible to have a monitor checking the connectivity of
a mysql server each 10s and another monitor that check the mysql server with
an SQL request each 15min ?
sure.
you can run as many monitors as you like and to get them to perform
more/less intensive checks, i recommend reading section 3.5.3.1 of the
OCF spec. basically you set a attribute called OCF_CHECK_LEVEL for
each monitor action.
eg.
<op id="rsc_c001n08-1" name="monitor" interval="5s" timeout="21s">
<instance_attributes ="foo">
<attributes>
<nvpair id="some-attr" name="OCF_CHECK_LEVEL" value="10"/>
</attributes>
</instance_attributes>
</op>
3.5.3.1. Parameters specific to the 'monitor' action
OCF_CHECK_LEVEL
0 The most lightweight check possible, which should not
have an impact on the QoS.
Example: Check for the existence of the process.
10 A medium weight check, expected to be called multiple
times per minute, which should not have a noticeable
impact on the QoS.
Example: Send a request for a static page to a
webserver.
20 A heavy weight check, called infrequently, which may
impact system or service performance.
Example: An internal consistency check to verify service
integrity.
Service must remain available during all of these operation.
All other number are reserved.
It is recommended that if a requested level is not implemented,
the RA should perform the next lower level supported.
If it's possible how to write it in the OCF scripts ???
Thanx.
--
benjamin
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