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Eventscript functions: new function ctdb_check_counter().

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This should eventually be able to replace ctdb_check_counter_limit()
and ctdb_check_counter_equal(), although it doesn't issue warnings
like the former.

It takes 4 optional arguments:

1. _msg - If "error" then over limit causes an error message and and
   exit 1.  Anything else fails silently but the function returns 1.
   Default is "error".

2. _op - An integer operator supported by test (e.g. -eq, -ge, -gt).
   Default is -ge.

3. _limit - Limit for the counter to be used in comparison.  Default is
   $service_fail_limit.

4. _service_name - Used to identify the counter.  Default is
   $service_name.

For example:

  ctdb_check_counter error -ge 5 foo

will print a message and exit 1 if the counter for foo is >= 5,
whereas

  ctdb_check_counter check -ge 5 foo

will just return 1 if the counter for foo is >= 5, and

  ctdb_counter_check

with print a message and exit 1 if the counter for $service_name is >=
$service_fail_limit.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit 5b01b7233515669e995e037205796e265643b176)
This commit is contained in:
Martin Schwenke 2010-12-17 16:10:56 +11:00
parent 219c6fd55b
commit 2a14f91722
1 changed files with 18 additions and 0 deletions
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18
ctdb/config/functions
View File

@ -545,6 +545,24 @@ ctdb_check_counter_equal () {
fi
return 0
}
ctdb_check_counter () {
_msg="${1:-error}" # "error" - anything else is silent on fail
_op="${2:--ge}" # an integer operator supported by test
_limit="${3:-${service_fail_limit}}"
shift 3
_ctdb_counter_common "$1"
# unary counting!
_size=$(stat -c "%s" "$_counter_file" 2>/dev/null || echo 0)
if [ $_size $_op $_limit ] ; then
if [ "$_msg" = "error" ] ; then
echo "ERROR: $_limit consecutive failures for $_service_name, marking node unhealthy"
exit 1
else
return 1
fi
fi
}
########################################################