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Eventscripts - new function ctdb_set_current_debuglevel()

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This function ensures that CTDB_CURRENT_DEBUGLEVEL is set.  It works
like this:

1. If it is already set then do nothing, since it might have been set
   some other way.

   The recommended "other way" would be to add a file in rc.local.d/.

2. If it is not set then set it by sourcing
   /var/ctdb/eventscript_debuglevel.

3. If this file does not exist then create it using output from "ctdb
   getdebug".

If the optional 1st argument is set to "create" then don't source an
existing file but create a new one instead - this is useful for
creating the file just once in each event run in, say, 00.ctdb.

If there's a problem getting the debug level from ctdb then it is
silently set to 0 - no use spamming logs if our debug code is
broken...

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

(This used to be ctdb commit 93910921c8a25f2b029733cd938069ff7c7bdab7)
This commit is contained in:
Martin Schwenke
2011-08-17 09:00:46 +10:00
parent 430ca2f606
commit 171bef3d68
1 changed files with 31 additions and 0 deletions
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31
ctdb/config/functions
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@ -37,6 +37,37 @@ loadconfig () {
_loadconfig "$@"
}
##############################################################
# make sure CTDB_CURRENT_DEBUGLEVEL is set to the desired debug level
# (integer)
#
# If it is already set then do nothing, since it might have been set
# via a file in rc.local.d/. If it is not set then set it by sourcing
# /var/ctdb/eventscript_debuglevel. If this file does not exist then
# create it using output from "ctdb getdebug". If the option 1st arg
# is "create" then don't source an existing file but create a new one
# instead - this is useful for creating the file just once in each
# event run in 00.ctdb. If there's a problem getting the debug level
# from ctdb then it is silently set to 0 - no use spamming logs if our
# debug code is broken...
ctdb_set_current_debuglevel ()
{
[ -z "$CTDB_CURRENT_DEBUGLEVEL" ] || return 0
_f="$CTDB_VARDIR/eventscript_debuglevel"
if [ "$1" = "create" -o ! -r "$_f" ] ; then
_t=$(ctdb getdebug -Y 2>/dev/null)
# get last field of output
_t="${_t%:}"
_t="${_t##*:}"
# Defaults to 0
echo "export CTDB_CURRENT_DEBUGLEVEL=\"${_t:-0}\"" >"$_f"
fi
. "$_f"
}
##############################################################
# determine on what type of system (init style) we are running
detect_init_style() {