Add a new shared provider configuration
Provider configurations are definitions of authentication and authorization controls for services proxied by Knox, which may be referenced by one or more descriptors.
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                Define the providers:
                - 
                        From Cloudera Manager > Knox > Configuration, add a new entry in  Knox Gateway Advanced Configuration Snippet (Safety Valve) for conf/cdp-resources.xml_role_safety_valve.
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                        Name the provider configuration, and specify the desired providers and
                            their corresponding configuration attributes.
                        Provider configuration entries are named asproviderConfigs:TOPOLOGY_NAME(E.G.,providerConfigs:myTopology).
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                        For each provider, the role is declared (E.G.,
                                role=authentication,role=authorization), and subsequently configured by defining properties of that role (E.G.,authentication.name=ShiroProvider,authentication.param.sessionTimeout=30).
 Example (LDAP authentication and Ranger authorization)- Name=providerConfigs:ldap-ranger-provider
- Value=role=authentication# authentication.name=ShiroProvider# authentication.param.sessionTimeout=30# authentication.param.main.ldapRealm=org.apache.hadoop.gateway.shirorealm.KnoxLdapRealm# authentication.param.main.ldapContextFactory=org.apache.knox.gateway.shirorealm.KnoxLdapContextFactory# authentication.param.main.ldapRealm.contextFactory=$ldapContextFactory# authentication.param.main.ldapRealm.contextFactory.authenticationMechanism=simple# authentication.param.main.ldapRealm.contextFactory.url=ldap://ldap-host:33389# authentication.param.main.ldapRealm.contextFactory.systemUsername=uid=guest,ou=people,dc=hadoop,dc=apache,dc=org# authentication.param.main.ldapRealm.userDnTemplate=uid={0},ou=people,dc=hadoop,dc=apache,dc=org# authentication.param.urls./**=authcBasic# role=authorization# authorization.name=XASecurePDPKnox
 
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                        From Cloudera Manager > Knox > Configuration, add a new entry in  
- Save your changes.
- Refresh your cluster: the Refresh needed stale configuration indicator appears; click it and wait until the refresh process completes.
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                Validate:
                Using the Knox Admin UI (https://KNOX_GATEWAY_HOST:PORT/GATEWAY_PATH/gateway/manager/admin-ui/), navigate to the Provider Configurations, and verify that your provider configuration was generated with the providers and parameters you specified.
