Check eDirectory LDAP Statistics

**Description:**

This check program queries the ldap server for it's ldap statistics and compares those values against them from the last run. It uses timestamps to calculate the number of searches / erros per second and if the number of searches or errors exceeds the warning or critical limit a matching output is written and the exitcode is set.

This program was tested with Novell eDirectory>= 8.7.3

When the ldap server is reloaded the counters I use are set back to zero I check that and then just create a new history file for the next run.


**Usage:** ./check_edir_ldap_stats.sh -options-

Options:
|| -H host || host name to check || default: localhost ||
|| -P port || port number, 389 for ldap, 636 for ldaps or any other port || default: 636 ||
|| -T ldap_type || ldap protocol, ldap or ldaps || default: ldaps ||
|| -w warn || number of ldap searches per second since last check to produce a warning state || default: 50 ||
|| -c crit || number of ldap searches per second since last check to produce a critical state || default: 100 ||
|| -u user || ldap bind user, if empty anonymous bind is tried || default: empty, anonymous bind ||
|| -p passw || password of the ldap bind user || default: empty ||

**Requirements:**

The openldap2-client package must be installed and the ldapsearch
command accessible through the search path of the user.


**Sample:**

Command: ./check_edir_ldap_stats.sh -H srv01 -P 636 -T ldaps -w 50 -c 100

First run produces the following output:
//**Script started the first time, writing just the history file /tmp/ldap_history.tmp**//
and this are the contents of the /tmp/ldap_history.tmp:
TIME: 1192464864
wholeSubtreeSearchOps: 1264376
oneLevelSearchOps: 575343
searchOps: 7017481
errors: 1141
securityErrors: 1175

The second run now compares those values against the current values and if any one of this values exceeds the warning or critical value, it is reported.
//**LDAPSTATS CRITICAL: wholeSubtreeSearchOps: 160 oneLevelSearchOps: 130 searchOps: 531 errors: 0 securityErrors: 0 - warn: 100 crit: 50**//

The output of the check program then just shows the difference between the first and the second run. So there were 160 subtree searches per second, 130 one level searches per second, ... during the last run.


**Changelog:**

version 1.0 - initial release
version 1.1 - changed the name of the logfiles to contain the ldap hostname so more then one ldap server can be monitored. Thanks to AIX5L fort this hint !