First, I am not an openldap expert.

I have openldap (slapd) running on a server that has been working for years. Today, I ran yum update and it updated quite a few packages, including the openldap packages. Once it finished (without errors) our LDAP server was not running. I attempted a simple service slapd start (and /etc/init.d/slapd start) both of which suddenly fail.

If I look in the /var/log/ldap.log file, I see these entries:

@(#) $OpenLDAP: slapd 2.4.40 (May 10 2016 23:30:49) $#012#011mockbuild@worker1.bsys.centos.org:/builddir/build/BUILD/openldap-2.4.40/openldap-2.4.40/build-servers/servers/slapd
read_config: no serverID / URL match found. Check slapd -h arguments.
slapd stopped.
connections_destroy: nothing to destroy.

Can anyone offer any suggestions?

Much Appreciated!

Update: I forgot to add that both slaptest and slaptest -u are successful:

# slaptest
config file testing succeeded
# slaptest -u
config file testing succeeded

Update #2: Here are the openldap version(s):


Here is also my slapd.conf file (that worked prior to the yum update):

include         /etc/openldap/schema/core.schema
include         /etc/openldap/schema/cosine.schema
include         /etc/openldap/schema/inetorgperson.schema
include         /etc/openldap/schema/nis.schema
include         /etc/openldap/schema/misc.schema
include         /etc/openldap/schema/passwordSelfReset.schema

allow bind_v2

pidfile     /var/run/openldap/slapd.pid
argsfile    /var/run/openldap/slapd.args

modulepath /usr/lib64/openldap

moduleload syncprov.la
moduleload unique.la

database monitor
access to *
        by dn.exact="gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth" read
        by dn.exact="cn=admin,dc=am5up,dc=com" read
        by * none

database    bdb
suffix      "dc=am5up,dc=com"
rootdn      "cn=admin,dc=am5up,dc=com"
rootpw {SSHA}0yFFC0BTYdZLDRNtSHVz1I6YC4zJ3Z0AZ09123
directory   /var/lib/ldap

index objectClass                       eq,pres
index ou,cn,mail,surname,givenname      eq,pres,sub
index uidNumber,gidNumber               eq,pres
index uid,memberUid                     eq,pres,sub
index nisMapName,nisMapEntry            eq,pres,sub

overlay unique
unique_attributes mail

ServerID        1 "ldap://ldap.am5up.com"

overlay         syncprov
syncprov-checkpoint     10 1
syncprov-sessionlog     100

For anyone else with this issue - I have figured out the problem. During the upgrade the slightly newer version requires the host to match the server definition in the config file.

For instance, in your slapd.conf file has a line like:

ServerID 1 "ldap://myldapserver"

Then your startup script (or when you startup slapd) you must define the host as "ldap://myldapserver".

This would appear to make sense; however, through my troubles today I learned that the default /etc/init.d/slapd file that was added during my initial install lists the host as blank. Thus, the default startup script, basically, executes:

slapd -h "" -u <user> -g <group>

Once I edited the startup script to ensure the -h switch on slapd matches what is in my config file everything started working again.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.