I will answer to myself and for those who will search.
Start Demo LDAP from Ambari UI as manual said.
It looks like admin-ui doesn't enabled by default. So I created manager.xml in
/etc/knox/conf/topologies/manager.xml with content (got it from knox github):
<?xml version="1.0" encoding="UTF-8"?>
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<topology>
<name>manager</name>
<gateway>
<provider>
<role>webappsec</role>
<name>WebAppSec</name>
<enabled>true</enabled>
<param>
<name>csrf.enabled</name>
<value>true</value>
</param>
<param>
<name>csrf.customHeader</name>
<value>X-XSRF-Header</value>
</param>
<param>
<name>csrf.methodsToIgnore</name>
<value>GET,OPTIONS,HEAD</value>
</param>
<param>
<name>xframe.options.enabled</name>
<value>true</value>
</param>
<param>
<name>xss.protection.enabled</name>
<value>true</value>
</param>
<param>
<name>strict.transport.enabled</name>
<value>false</value>
</param>
</provider>
<provider>
<role>federation</role>
<name>SSOCookieProvider</name>
<enabled>true</enabled>
</provider>
<provider>
<role>identity-assertion</role>
<name>HadoopGroupProvider</name>
<enabled>true</enabled>
<param>
<name>CENTRAL_GROUP_CONFIG_PREFIX</name>
<value>gateway.group.config.</value>
</param>
</provider>
<provider>
<role>authorization</role>
<name>AclsAuthz</name>
<enabled>true</enabled>
<param>
<name>knox.acl.mode</name>
<value>OR</value>
</param>
<param>
<name>knox.acl</name>
<value>KNOX_ADMIN_USERS;KNOX_ADMIN_GROUPS;*</value>
</param>
</provider>
</gateway>
<service>
<role>KNOX</role>
</service>
<application>
<name>admin-ui</name>
</application>
</topology>
Don't forget to change the owner:
chown knox:knox /etc/knox/conf/topologies/manager.xml
Check existing of /etc/knox/conf/topologies/knoxsso.xml
Check `redirectToUrl` in `Advanced knoxsso-topology` in Ambrai Knox Configs. It should contain cluster name (mine was configured to /default/)
Check topologies for LDAP configuration, they should be configured to query `ou=people,dc=hadoop,dc=apache,dc=org` (Demo LDAP), in my case some of them were configured to `ou=Users,dc=hadoop,dc=apache,dc=org`Restart ldap
Restart Knox
Test:
curl -iku admin:admin-password -X GET 'https://<master_public_ip>:8443/<clustername>/dp-proxy/livy/v1/sessions'
Test admin UI:
https://<master_public_ip>:8443/<clustername>/manager/admin-ui/
PS. Somehow if I query LDAP with ldapseach at master node and localhost:33389 it returns me users with randomly generated passwords. But users.ldif file has simple passwords as it configured in Ambari. And simple passwords work, so what's wrong with ldap at localhost:33389 and which LDAP queried by Knox?
