[ClusterLabs] Antw: Re: Constant stop/start of resource in spite of interval=0
kadlecsik.jozsef at wigner.mta.hu
Mon May 20 17:15:11 EDT 2019
On Mon, 20 May 2019, Ken Gaillot wrote:
> On Mon, 2019-05-20 at 15:29 +0200, Ulrich Windl wrote:
> > What worries me is "Rejecting name for unique".
> Trace messages are often not user-friendly. The rejecting/accepting is
> nothing to be concerned about; it just refers to which parameters are
> being used to calculate that particular hash.
> Pacemaker calculates up to three hashes.
> The first is a hash of all the resource parameters, to detect if
> anything changed; this is stored as "op-digest" in the CIB status
> If the resource is reloadable, another hash is calculated with just the
> parameters marked as unique=1 (which means they can't be reloaded). Any
> change in these parameters requires a full restart. This one is "op-
> Finally, if the resource has sensitive parameters like passwords, a
> hash of everything but those parameters is stored as "op-secure-
> digest". This one is only used when simulating CIBs grabbed from
> cluster reports, which have sensitive info scrubbed.
Thanks for the explanation! It seemed very cryptic in the trace messages
that different hashes were calculated with differen parameter lists.
> From what's described here, the op-restart-digest is changing every
> time, which means something is going wrong in the hash comparison
> (since the definition is not really changing).
> The log that stands out to me is:
> trace May 18 23:02:49 calculate_xml_digest_v1(83):0: digest:source <parameters id="0"/>
> The id is the resource name, which isn't "0". That leads me to:
> trace May 18 23:02:49 svc_read_output(87):0: Got 499 chars: <parameter name="id" unique="1" required="1">
> which is the likely source of the problem. "id" is a pacemaker property,
> not an OCF resource parameter. It shouldn't be in the resource agent
> meta-data. Remove that, and I bet it will be OK.
I renamed the parameter to "tunnel_id", redefined the resources and
started them again.
> BTW the "every 15 minutes" would be the cluster-recheck-interval
> cluster property.
I have waited more than half an hour and there are no more
stopping/starting of the resources. :-) I haven't thought that "id" is
reserved as parameter name.
E-mail : kadlecsik.jozsef at wigner.mta.hu
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