LDAP-Sync not configured

[Jenziner]

Multiple LDAP running, but not synchronized. See error in docker log of consumer:
67322196 conn=1001 fd=12 ACCEPT from PATH=/var/run/slapd/ldapi (PATH=/var/run/slapd/ldapi)
67322196 conn=1001 op=0 BIND dn="" method=163
67322196 conn=1001 op=0 BIND authcid="gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth" authzid="gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth"
67322196 conn=1001 op=0 BIND dn="gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth" mech=EXTERNAL sasl_ssf=0 ssf=71
67322196 conn=1001 op=0 RESULT tag=97 err=0 text=
67322196 conn=1001 op=1 ADD dn="olcOverlay=syncprov,olcDatabase={1}mdb,cn=config"
67322196 conn=1001 op=1 RESULT tag=105 err=17 text=olcSyncProvSessionlog: attribute type undefined
67322196 conn=1001 op=2 UNBIND
67322196 conn=1001 fd=12 closed

Manual:

1. Export LDAP-DB on Provider (orbis, ldap.jedo.dev)
   docker exec <provider_container_name> slapcat -l /tmp/ldap_backup.ldif
2. Copy to Consumer (regnum, ldap.tws.jedo.dev)
   docker cp <provider_container_name>:/tmp/ldap_backup.ldif /tmp/ldap_backup.ldif
   docker cp /tmp/ldap_backup.ldif <consumer_container_name>:/tmp/ldap_backup.ldif
3. Import LDAP-DB on Consumer
   docker exec <consumer_container_name> ldapadd -x -D "cn=admin,dc=jedo,dc=dev" -w adminpassword -f /tmp/ldap_backup.ldif

May be automated with cron
on Provider:
0 * * * * docker exec <provider_container_name> slapcat -l /tmp/ldap_backup.ldif
on Consumer:
5 * * * * docker cp <provider_container_name>:/tmp/ldap_backup.ldif <consumer_container_name>:/tmp/ldap_backup.ldif && docker exec <consumer_container_name> ldapadd -x -D "cn=admin,dc=jedo,dc=dev" -w adminpassword -f /tmp/ldap_backup.ldif