example_configs: Add Rancher example

example_configs/rancher.md

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+# Configuration for SUSE Rancher (any version)
+###  Left (hamburger) menu > Users & Authentication > OpenLDAP (yes, we are using the OpenLDAP config page)
+---
+
+## LDAP configuration
+
+#### Hostname/IP
+```
+ip-address, DNS name or when running in Kubernetes (see https://github.com/Evantage-WS/lldap-kubernetes), lldap-service.lldap.svc.cluster.local
+```
+#### Port
+```
+3890
+```
+#### Service Account Distinguished name
+A better option is to use a readonly account for accessing the LLDAP server
+```
+cn=admin,ou=people,dc=example,dc=com
+```
+#### Service Account Password
+```
+xxx
+```
+#### User Search Base
+```
+ou=people,dc=example,dc=com
+```
+
+#### Group Search Base
+```
+ou=groups,dc=example,dc=com
+```
+
+#### Object Class (users)
+```
+inetOrgPerson
+```
+
+#### Object Class (groups)
+```
+groupOfUniqueNames
+```
+
+#### Username Attribute
+```
+uid
+```
+
+#### Name Attribute
+```
+cn
+```
+
+#### Login Attribute
+```
+uid
+```
+
+#### Group Member User Attribute
+```
+dn
+```
+
+#### User Member Attribute
+```
+memberOf
+```
+
+#### Search Attribute (groups)
+```
+cn
+```
+
+#### Search Attribute (users)
+```
+uid|sn|givenName
+```
+
+#### Group Member Mapping Attribute
+```
+member
+```
+
+#### Group DN Attribute
+```
+dn
+```
+
+##### Choose "Search direct and nested group memberships"
+
+##### Fill in the username and password of an admin user at Test and Enable Authentication and hit save
+
+## Rancher OpenLDAP config page
+
+![Rancher OpenLDAP config page](images/rancher_ldap_config.png)