Abdelkader Chelouah wrote:
> > Hi,
> >
> > slapd 2.4.44
> >
> > OpenLDAP instance configure as a proxy (back-ldap)
> >
> >
> > From time to time, bind operations can take more than 5 sec. These
> > latencies do not seem to come from a CPU or memory problem. I'm trying to
> > see if the network
> > can be the root cause of the issue. To debug the fonction ldap_sasl_bind
> > (libraries/libldap/sasl.c), I activated trace loglevel (logs are manage by
> > rsyslog). In
> > the definition of ldap_sasl_bind, there is
> >
> > Debug( LDAP_DEBUG_TRACE, "ldap_sasl_bind\n", 0, 0, 0 );
> >
> > A least the message "ldap_sasl_bind" should appear in logs, which is not
> > the case. Actually, Debug (which is first defined in include/ldap_log.h) is
> > redefined
> > in libraries/libldap/ldap-int.h
> >
> > ...
> >
> > #include "ldap_log.h"
> >
> > #undef Debug
> >
> > #ifdef LDAP_DEBUG
> >
> > #define DebugTest( level ) \
> > ( ldap_debug & level )
> >
> > #define Debug( level, fmt, arg1, arg2, arg3 ) \
> > do { if ( ldap_debug & level ) \
> > ldap_log_printf( NULL, (level), (fmt), (arg1), (arg2), (arg3) ); \
> > } while ( 0 )
> >
> > #define LDAP_Debug( subsystem, level, fmt, arg1, arg2, arg3 )\
> > ldap_log_printf( NULL, (level), (fmt), (arg1), (arg2), (arg3) )
> > configure
> > #else
> >
> > #define DebugTest( level ) (0 == 1)
> > #define Debug( level, fmt, arg1, arg2, arg3 ) ((void)0)
> > #define LDAP_Debug( subsystem, level, fmt, arg1, arg2, arg3 ) ((void)0)
> >
> > #endif /* LDAP_DEBUG */
> >
> > ...
> >
> > A a result, the message is send to standard output. By using rsyslog, it is
> > not possible to catch any message inside ldap_sasl_bind.
> >
> >
> > How to get stdout and stderr messages and still use rsyslog to manage
> > openldap logs ?
> syslog is not fast enough to handle the debug traffic.
> You could use ber_set_option() to override the log output functions, and have
> them write
> messages both to rsyslog and stderr. But using syslog on every debug message
> will slow
> things down more than 10x.
Hi,
I'am also interressed to enable stderr and stdout to rsyslog.
I try to figure out how to use ber_set_option(), but i'am pretty sur i miss
something in my analysis.
Starting from the function ldap_sasl_bind in file libraries/libldap/sasl.c
+ Debug( LDAP_DEBUG_TRACE, "ldap_sasl_bind\n", 0, 0, 0 );
Debug is macro define in first place in include/ldap_log.h and override by
libraries/libldap/ldap-int.h
So Debug is replace by ldap_log_printf() which is defined in
libraries/libldap/print.c, ldap_log_printf() make some check and get varargs
and send to pointer function 'ber_pvt_log_print'
ber_pvt_log_print is pointer to ber_error_print() in file
libraries/liblber/bprint.c. So the target is to change ber_pvt_log_print
In function ber_set_option() we can redefine the print function
ber_pvt_log_print to write messages both to rsyslog and stderr.
(in /servers/slapd/main.c) ber_set_option(NULL, LBER_OPT_LOG_PRINT_FN,
&print_syslog);
The function is pretty basic :
void print_syslog( LDAP_CONST char *data )
{
Log0(LDAP_DEBUG_ANY, ldap_syslog_level, data);
return ;
}
Of course i declare prototype in header file. Is it what you have in mind or
should i use a function in OpenLDAP ?
