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Martin Schwenke 2a14f91722 Eventscript functions: new function ctdb_check_counter(). 
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)
2011-08-11 10:46:56 +10:00
..
events.d Eventscripts: make 50.samba use $service_state_dir. 2011-08-11 10:46:56 +10:00
ctdb-crash-cleanup.sh In the example script to remove all ip addresses after a ctdb crash, 2010-04-23 09:08:26 +10:00
ctdb.init Eventscripts: remove unnecessary absolute paths from external commands. 2011-08-03 17:19:15 +10:00
ctdb.sysconfig Add documentation for the new filesystem use monitoring 2011-08-11 10:07:50 +10:00
functions Eventscript functions: new function ctdb_check_counter(). 2011-08-11 10:46:56 +10:00
gdb_backtrace lib/util: import fault/backtrace handling from samba. 2010-01-20 09:44:36 +01:00
interface_modify.sh Scripts: remove absolute paths from interface_modify.sh. 2011-08-08 15:50:10 +10:00
notify.sh server: add "setup" event 2010-02-23 10:38:49 +01:00
README Scripts: add note about not using absolute command paths to README. 2011-08-09 16:36:37 +10:00
statd-callout Eventscripts: remove unnecessary absolute paths from external commands. 2011-08-03 17:19:15 +10:00

README 

This directory contains run-time support scripts for CTDB.

Selected highlights:

  ctdb.init

    An initscript for starting ctdbd at boot time.

  events.d/

    Eventscripts.  See events.d/README for more details.

  functions

    Support functions, sourced by eventscripts and other scripts.

  interface_modify.sh

    Script to support add/remove IPs and other funky stuff.  Not sure
    why this is separate... but it certainly allows easy wrapping by
    flock.

  statd-callout

    rpc.statd high-availability callout to support lock migration on
    failover.

Notes:

* All of these scripts are written in POSIX Bourne shell.  Please
  avoid bash-isms, including the use of "local" variables (which are
  not available in POSIX shell).

* Do not use absolute paths for commands.  Unit tests attempt to
  replace many commands with stubs and can not do this if commands are
  specified with absolute paths.  The functions file controls $PATH so
  absolute paths should not be required.