To configure quotas for an LDAP server, follow the steps below:
1. Install the LDAP server software and configure it according to your needs.
1. Create a group or groups that you want to set quotas for. You can choose to create a single group or multiple groups, depending on your requirements.
1. Configure the quota limits for each group by setting the following attributes:
- quota: This attribute specifies the maximum number of entries that a group can have.
- quota-warning: This attribute sets the threshold at which a warning should be issued to the group that it is approaching its quota limit.
- quota-policy: This attribute determines what action should be taken when a group exceeds its quota limit. The available policies are “soft,” “hard,” and “none.” The “soft” policy allows the group to continue adding entries, but sends a warning message when the quota is exceeded. The “hard” policy prevents the group from adding any more entries once the quota limit has been reached. The “none” policy does not enforce any quotas.
1. Once the quota limits have been configured, enforce them by creating a directory access control rule that specifies the quota limits for each group.
For example, to set a quota limit of 100 entries for the group “sales,” with a warning threshold of 80, and a soft quota policy, the following LDAP attributes can be set:
dn: cn=sales,ou=groups,dc=example,dc=com
objectClass: groupOfNames
member: uid=john,ou=people,dc=example,dc=com
quota: 100
quota-warning: 80
quota-policy: soft
To enforce the quota limit, a directory access control rule can be created as follows:
dn: dc=example,dc=com
changetype: modify
add: aci
aci: (targetattr = “entryCount”)(targetfilter = “(objectClass=groupOfNames)(cn=sales)”)(target = “ldap:///dc=example,dc=com”)(version 3.0; acl “sales Quota Limit”; allow(all) userdn=“ldap:///cn=directory manager”; quota(default,soft,soft) = “cn=sales,ou=groups,dc=example,dc=com”;)
This ACL rule allows the directory manager to perform all operations, but enforces the quota limits for the “sales” group.
In summary, configuring quotas for an LDAP server involves creating groups, setting quota limits, and enforcing them through directory access control rules.
