[Linux-HA] BUG: Lifetime rule?

[Max Hofer]

I played around with the lifetime attribute in constraints and i found
following behaviour strange (or maybe i don't understand the meaning
of the lifetime attribute).

Attached a cib which implements the same expression twice, once
in a rule of a lifetime attribute and once in a normal rule.

The expression just checks the value of a variable in the status section
(which i added manually with attrd_updater).

The same expression fails in 'dummy-restart-hysteresis-lifetime-rule' but
evaluates correctly in 'dummy-location-rule2'. (evaluated with ptest)

I think this is not correct - or am I wrong?

Attached the CIB and ptest output.

General question: the reason to use the lifetime rule comes from by
desired functionality to not restart a failed resource for a certain amount
of time.

My implementation is the following:
* the stop operation of the resource agent maps an attribute in the CIB
with a dampen delete operation, something like
restart_hysteresis() {
  local hysteresis=${1:="30s"}  # set default restart hysteresis to 30 seconds
  attrd_updater -d 0 -n resource-stopped -v true
  sleep 0.5	# this is needed or no attribute is set (!!! a bug IMHO)
  attrd_updater -d "$hysteresis" -n resource-stopped -v true
}

* now make a rule with a lifetime which disables the resource. The lifetime
should evaluate to 'true' as long 'resource-stopped' is 'true'.

(i know i could implement this also without lifetime ... i just was curious
if this would work)

Does anyone know an easier way to achieve the described hysteresis behaviour?

kind regards Max
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