Sorry to bump on my own question...

Does anyone have an idea how I could solve this?

Nico

Hi,

I'm trying to set up a proxy-cache to a couple of OpenLDAP servers configured in mirror mode.

The back-ldap part is working fine and I can query the underlying slapd instances through the proxy.

However, I'm still struggling with the caching bit. I couldn't find any documentation or posts related to setting this up using the new cn=config way of configuring LDAP. So after some reading and a bit of guessing, I came up with the following config:

# {1}ldap, config dn: olcDatabase={1}ldap,cn=config objectClass: olcDatabaseConfig objectClass: olcLDAPConfig olcDatabase: {1}ldap olcSuffix: dc=sol1,dc=net olcAccess: {0}to dn.base="" by * read olcAccess: {1}to dn.base="cn=Subschema" by * read olcAccess: {2}to * by self write by users read by anonymous auth olcRootDN: uid=ldapadmin,dc=sol1,dc=net olcRootPW: secret olcDbURI: "ldap://192.168.200.12 ldap://192.168.200.14" olcDbACLBind: bindmethod=simple binddn="uid=ldapadmin,dc=sol1,dc=net" credentials="secret" starttls=no

# {0}pcache, {1}ldap, config dn: olcOverlay={0}pcache,olcDatabase={1}ldap,cn=config objectClass: olcOverlayConfig objectClass: olcPcacheConfig olcOverlay: {0}pcache olcPcache: bdb 10000 3 1000 100 olcPcacheAttrset: 0 uid userPassword uidNumber gidNumber cn homeDirectory loginShell gecos description objectClass olcPcacheAttrset: 1 sudoCommand sudoHost olcPcacheAttrset: 2 gidNumber olcPcacheTemplate: (&(objectClass=)(uid=)) 0 300 olcPcacheTemplate: (sudoUser=) 1 300 olcPcacheTemplate: (&(objectClass=)(memberUid=)) 2 300

# {2}bdb, config dn: olcDatabase={2}bdb,cn=config objectClass: olcDatabaseConfig objectClass: olcBdbConfig olcDatabase: {2}bdb olcDbDirectory: /var/lib/ldap/cache olcSuffix: cn=proxy olcRootDN: uid=ldapadmin,dc=sol1,dc=net olcDbCacheSize: 5000 olcDbConfig: {0}set_cachesize 0 2097152 0 olcDbConfig: {1}set_lk_max_objects 1500 olcDbConfig: {2}set_lk_max_locks 1500 olcDbConfig: {3}set_lk_max_lockers 1500 olcDbIndex: objectClass eq olcDbIndex: uid eq olcDbIndex: cn eq olcDbIndex: uidNumber eq olcDbIndex: gidNumber eq olcDbIndex: memberUid eq olcDbIndex: uniqueMember eq olcDbIndex: mail eq olcDbIndex: surname eq olcDbIndex: givenname eq olcDbIndex: sambaSID eq olcDbIndex: sambaPrimaryGroupSID eq olcDbIndex: sambaDomainName eq olcDbIndex: sudoUser eq

But running ldapsearch keeps returning:

# search result search: 2 result: 52 Server is unavailable text: pcachePrivDB: cacheDB not available

I didn't find any way to specify which database to use when declaring the overlay, apart from the 'bdb' part of olcPcache, but that seems to be interpreted as the database type, not its name (I've tried replacing it with cn=proxy, but that throws an error).

Looking at the pcache overlay source (I'm running 2.4.21 from Ubuntu Lucid and also checked the latest 2.4.23 stable source), I can see this bit:

{ "pcache-", "private database args", 1, 0, STRLENOF("pcache-"), ARG_MAGIC|PC_PRIVATE_DB, pc_cf_gen, NULL, NULL, NULL },

That seems to be for the private DB options, but the other equivalent "pcacheXXXX" in this file have the corresponding attribute declaration for the schema instead of 'NULL, NULL, NULL'.

Anyway, I'm obviously missing something :)

If someone who's got this working or a developer could point me in the right direction, that would be greatly appreciated!

Thanks, Nico