EMR user guide for Privacera Platform

Create bucket ${SECURE_BUCKET_NAME} which you need to protect.
Download sample data from the following link and add it to your bucket at location s3://${SECURE_BUCKET_NAME}/sample_data/customer_data.
```
wget https://privacera-demo.s3.amazonaws.com/data/uploads/customer_data_clear/customer_data_without_header.csv
```
Make sure cluster should not have direct access on ${SECURE_BUCKET_NAME} bucket.
To verify, run the following commands:
```
ssh -i ${KEY_FILE} hadoop@${EMR_PUBLIC_DNS}
aws s3 ls  s3://${SECURE_BUCKET_NAME}
```
Fatal error: An error occurred (403) when calling the HeadObject operation: Forbidden

Hive

Run the following command in beeline, using an admin user who has permission on URL in Ranger and also has permission to create tables and databases:
```
beeline  -u "jdbc:hive2://`hostname -f`:10000/default;principal=hive/`hostname -f`@${REALM}"
```

Create the table using this user, by running the following command in Hive:

create database if not exists customer;
use customer;
CREATE EXTERNAL TABLE if not exists `customer_data_s3`(
`id` string,
`global_id` string,
`name` string,
`ssn` string,
`email_address` string,
`address` string) 

ROW FORMAT DELIMITED

    FIELDS TERMINATED BY ','

STORED AS INPUTFORMAT

    'org.apache.hadoop.mapred.TextInputFormat'

OUTPUTFORMAT

    'org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat'

LOCATION

's3a://${SECURE_BUCKET_NAME}/sample_data/customer_data';

Exit from beeline.

Switch to ${TEST_USER} and kinit and try sample policy.

beeline  -u "jdbc:hive2://`hostname -f`:10000/default;principal=hive/`hostname -f`@${REALM}"
#Check ranger audit for hive service
Select * from customer.customer_data_s3 LIMIT 10;

Data_Admin access

Prerequisites

To create a view using the Hive Plug-In, you need the DATA_ADMIN permission in Ranger.
The source table on which you are going to create a view requires the DATA_ADMIN Ranger policy.

Use case

This use case starts with an employee_db database containing two tables with the following data:

#Requires create privilege on the database enabled by default;
create database if not exists employee_db;

Create two tables.

#Requires create privilege on the table level;

create table if not exists employee_db.employee_data(id int,userid string,country string);
create table if not exists employee_db.country_region(country string,region string);

Insert test data:

#Requires update privilege on the table level; 

insert into employee_db.country_region values ('US','NA'), ('CA','NA'), ('UK','UK'), ('DE','EU'), (','EU'); 

insert into employee_db.employee_data values (1,'james','US'),(2,'john','US'), (3,'mark','UK'), (4,'sally-sales','UK'),(5,'sally','DE'), (6,'emily','FR'DE');

Create the following policy:
- Policy Type: Access Policy
- Name: Create View Access
- Database: employee_db
- Table: employee_data, country_region
- Column: *
- Select User: emily
- Permissions: select, update, Create

Run queries on the data:

SELECT * FROM employee_db.country_region;
#Requires select privilege on the column level;

SELECT * FROM employee_db.employee_data;
#Requires select privilege on the column level;

Create the following view:

create view employee_db.employee_region(userid,region) as select e.userid, cr.region from employee_db.employee_data e, employee_db.country_region cr where e.country=cr.country;

Note

Granting Data_admin privileges on the resource implicitly grants Select privilege on the same resource as well.

Run the same queries as in Step 4. You will see an error message like the following:

Error: Error while compiling statement:
FAILED: HiveAccessControlException
Permission denied: user [emily] does not have [DATA_ADMIN] privilege on [employee_db/employee_data](state=42000,code=40000)

Now create the following policy.
- Policy Type: Access Policy
- Name: Create View Access
- Database: employee_db
- Table: employee_region
- Column: *
- Select Group: group_privacera_dev
- Permissions: select, Create
Execute the queries from Step 3. They should execute properly.

Alter view

create view if not exists employee_db.employee_region(userid,region) as select e.userid, cr.region from employee_db.employee_data e, employee_db.country_region cr where e.country = cr.country;

#Requires Create permission on the view;
ALTER VIEW employee_db.employee_region AS select e.userid, cr.region from employee_db.employee_data e,employee_db.country_region cr where e.country=cr.country;

Rename view

#Requires Alter permission on the view;
ALTER VIEW employee_db.employee_region RENAME to employee_db.employee_region_renamed;

Drop view

#Requires Drop permission on the view;
DROP VIEW employee_db.employee_region_renamed;

Row level filter

SELECT * FROM employee_db.employee_region;

Column masking

SELECT * FROM employee_db.employee_region;

PrestoDB

SSH to EMR on master node.

Start Presto shell (presto, spark-thrift, hive all three using same metastore) by entering one of the following commands:

 presto-cli --catalog hive

/usr/lib/presto/bin/presto-cli-0.210-executable --server localhost:8889 --catalog hive --schema default

Attempt the following use case as a test.

CREATE SCHEMA customer WITH (location='s3a://${SECURE_BUCKETNAME}/presto_data/customer/');
USEcustomer;
CREATE TABLE cust_data(
    EMP_SSNvarchar,
CC varchar,
    FIRST_NAME varchar,
    LAST_NAME varchar,
ADDRESS varchar,
ZIPCODE varchar,
EMAIL varchar,
    US_PHONE_FORMATTED varchar);
    INSERT INTO cust_data values ('12345','6789','Will','Smith','US','400098','ws@gmail.com','010-564-333');
    SELECT * FROM cust_data;

Full Table Access.

#Add policy in ranger to access everything in the table
SELECT * FROM cust_data;

Restricted Column Access.

#Column level permission in table. If User doesn't have permission to “first_name” column
#Will be denied in audit
select first_name from cust_data;
#Will be allowed in audit
select last_name, address, zipcode, email from cust_data;

Enable additional operations on Hive catalog by updating hive.properties. By default, PrestoDB blocks the operations. For more information, see Hive Security Configuration.

Edit hive.properties.

sudo vi /etc/presto/conf/catalog/hive.properties

Add the following properties:

connector.name=hive-hadoop2
hive.allow-drop-table=true
hive.allow-rename-table=true
hive.allow-add-column=true
hive.allow-rename-column=true
hive.allow-drop-column=true
hive.config.resources=/etc/hadoop/conf/core-site.xml,/etc/hadoop/conf/hdfs-site.xml
hive.s3-file-system-type=EMRFS
hive.hdfs.impersonation.enabled=false

Note

The hive.properties file needs to be updated on all the EMR nodes.

Restart Presto.
```
sudo systemctl restart presto-server
```

Alternatively, you can include the properties while creating the EMR itself in the CloudFormation Template. Following is the sample JSON:

{"Classification":"presto-connector-hive","ConfigurationProperties":{"hive.metastore":"glue","hive.allow-drop-table":"true","hive.allow-add-column":"true","hive.allow-rename-column":"true","connector.name":"hive-hadoop2","hive.config.resources":"/etc/hadoop/conf/core-site.xml,/etc/hadoop/conf/hdfs-site.xml","hive.s3-file-system-type":"EMRFS","hive.hdfs.impersonation.enabled":"false","hive.allow-drop-column":"true","hive.allow-rename-table":"true"}}

PrestoSQL

Start PrestoSQL shell.
```
presto-cli --catalog hive
```

Create the schema with an admin/superuser.

CREATE SCHEMA customer WITH (location='s3a://${SECURE_BUCKETNAME}/presto_data/schema/customer’);
USE customer;

Create the table using admin/superuser.

USE customer;

CREATE TABLE customer_data(
id varchar,
name varchar,
ssn varchar,
email_address varchar,
address varchar)
WITH(
    format='textfile',
    external_location='s3a://${SECURE_BUCKETNAME}/presto_data/table/customer_data'
    );

Exit the Presto-CLI and switch to {TEST_USER}, then kinit and try a sample policy.

presto-cli --catalog hive
use customer;
SELECT * FROM customer_data LIMIT 10;

Data_Admin Access

Prerequisites

To create a view using the Presto SQL Plug-In, you need the DATA_ADMIN permission in Ranger.
The source table on which you are going to create a view requires the DATA_ADMIN Ranger policy.

Use Case

Create a database called employee_db with two tables containing the following data:

#Requires create privilege on the database enabled by default;
create schema if not exists employee_db;

In Privacera Portal select Access Management, then from the list of resource policy groups select privacera_hive which is under SQL.
Add a new policy:
- Policy Type: Access
- Policy Name: Employee Schema Create Permission
- Database: employee_db
- Table: *
- Column: *
- Select User: presto
- Permissions: Create
Click SAVE.

Create two tables.

#Requires create privilege on the table level;

CREATE TABLE IF NOT EXISTS employee_db.employee_data(id int, userid string, country string);
CREATE TABLE IF NOT EXISTS employee_db.country_region(country string, region string);

In Privacera Portal, create the following policy:
- Policy Type: Access
- Policy Name: Employee Table Create Permission
- Database: employee_db
- Table: employee_data, country_region
- Column: *
- Select User: presto
- Permissions: Create

Insert test data.

#Requires update privilege on the table level;

insert into employee_db.country_region values ('US','NA'), ('CA','NA'), ('UK','UK'), ('DE','EU'), ('FR','EU');
insert into employee_db.employee_data values (1,'james','US'),(2,'john','US'), (3,'mark','UK'), (4,'sally-sales','UK'),(5,'sally','DE'), (6,'emily','DE');

In Privacera Portal, create the following policy:
- Policy Type: Access
- Policy Name: Employees Table Update Permission
- Database: employee_db
- Table: employee_data, country_region
- Column: *
- Select User: presto
- Permissions: update, Create
Create a view for the previoustwo tables created; you will get an error:
```
Query 20210223_051227_00005_nyxtw failed: Access Denied: Cannot create view tbl_view_5
```
You need Create View permission.
Create the following policy:
- Policy Type: Access
- Policy Name: Employees Create View Permission
- Database: employee_db
- Table: tbl_view_1
- Select User: presto
- Permissions: Create
After granting Create View permission, the query will result in the following error message:
```
Query 20210223_050930_00004_nyxtw failed: Access Denied: User [emily] does not have [DATA_ADMIN] privilege on [hive/employee_db/employee_data]
```
You need to grant Data_Admin permission for both tables.
Create the following policy:
- Policy Type: Access
- Policy Name: Employees Create View Permission Data_admin
- Database: employee_db
- Table: employee_data, country_region
- Column: *
- Select User: presto
- Permissions: update, Create, Data_admin
Note
Granting Data_admin privileges on the resource implicitly grants Select privilege on the same resource as well.
Run the query again. It should be successful.

Alter view

Create view

presto:customer> create view tbl_view_1 as SELECT * FROM tbl_1;
CREATE VIEW
presto:customer> SELECT * FROM tbl_view_1;
c0 |   c1   |    c2     |          c3           |           c4
----+--------+-----------+-----------------------+------------------------
2  | James  | 892821225 | james@walt.com        | 4578 Extension xxx
1  | Dennis | 619821225 | thomasashley@walt.com | 9478 Anthony Extension
3  | Sally  | 092341225 | sally@walt.com        | 5678 Extension xyxx
(3 rows)


Query 20210303_142252_00006_g76nu, FINISHED, 1 node
Splits: 19 total, 19 done (100.00%)
1.86 [3 rows, 169B] [1 rows/s, 91B/s]

Alter view

presto:customer> CREATE OR REPLACE VIEW tbl_view_1 as SELECT * FROM tbl_3;
CREATE VIEW
presto:customer> SELECT * FROM tbl_view_1;
slno | name | mobile |  email  | address
------+------+--------+---------+---------
1    | emily |   1234 | s@s.com | in
(1 row)

Query 20210303_142341_00009_g76nu, FINISHED, 1 node
Splits: 17 total, 17 done (100.00%)
0.91 [1 rows, 0B] [1 rows/s, 0B/s]

Rename view

presto:customer> alter view tbl_view_1 rename to tbl_view_2;
RENAME VIEW
presto:customer>

Drop view

presto:customer> drop view tbl_view_1;
DROP VIEW
presto:customer>

Row level filter

presto:employee_db> SELECT * FROM tbl_1;

id |   userid    | country
----+-------------+---------
1 | james       | US
2 | john        | US
3 | mark        | UK
4 | sally-sales | UK
5 | sally       | DE
6 | emily       | DE
(6 rows)

Query 20210309_060602_00022_5amn7, FINISHED, 1 node
Splits: 17 total, 17 done (100.00%)
4.11 [6 rows, 0B] [1 rows/s, 0B/s]

In Privacera Portal, set the Policy Detail:
- Policy Type: Row Level Filter
- Policy Name: Employee Row Level Filter
- Hive Database: employee_db
- Hive Table: employee_data, country_region, tbl_1
- Column: *
Under Row Level Conditions:
- Select User: presto
- Permissions: select
- Row Level Filter: country='US'

    presto:employee_db>
    presto:employee_db> SELECT * FROM tbl_1;
    id | userid | country
    ----+--------+---------
    1 | james  | US
    2 | john   | US
    (2 rows)

    Query 20210309_061202_00024_5amn7, FINISHED, 1 node
    Splits: 17 total, 17 done (100.00%)
    0.45 [6 rows, 0B] [13 rows/s, 0B/s]

Column masking

presto:employee_db> SELECT * FROM tbl_1;
id |   userid    | country
----+-------------+---------
1 | james       | US
2 | john        | US
3 | mark        | UK
4 | sally-sales | UK
5 | sally       | DE
6 | emily       | DE
(6 rows)

Query 20210309_062000_00027_5amn7, FINISHED, 1 node
Splits: 17 total, 17 done (100.00%)
0.30 [6 rows, 0B] [20 rows/s, 0B/s]

In Privacera Portal, the Policy Detail:
- Policy Type: Masking
- Policy Name: Employee Column Level Masking
- Hive Database: employee_db
- Hive Table: employee_data, country_region
- Hive Column: tbl_1
Under Masking Conditions:
- Select User: presto
- Permissions: select
- Select Masking Option: Nullify

    presto:employee_db>
    presto:employee_db> SELECT * FROM tbl_1;
    id |   userid    | country
    ----+-------------+---------
    1 | james       | NULL
    2 | john        | NULL
    3 | mark        | NULL
    4 | sally-sales | NULL
    5 | sally       | NULL
    6 | emily       | NULL
    (6 rows)

    Query 20210309_061856_00026_5amn7, FINISHED, 1 node
    Splits: 17 total, 17 done (100.00%)
    0.32 [6 rows, 0B] [18 rows/s, 0B/s]

Access views in AWS Athena

Use the following steps to provide access for views created in AWS Athena. As a result, you will be able to query the views.

Copy the Hive catalog properties (or create a symlink) as awsdatacatalog.properties in /etc/presto/conf/catalog folder.
```
xln -s /etc/presto/conf/catalog/hive.properties /etc/presto/conf/catalog/awsdatacatalog.properties
```
Restart the Presto server.
```
sudo systemctl restart presto-server
```
In Access Management > Resource Policies, update the privacera_hive default policy.
1. Edit all - database, table policy.
2. In Select User, add 'Presto' from the dropdown as the default view owner, and save.
(Optional) To change the default view owner from 'Presto' to any other owner such as 'Hadoop':
1. In the access-control.properties file, add the owner to the ranger.policy.authorization.viewowner.default variable.
```
vi /usr/lib/presto/etc/access-control.properties
ranger.policy.authorization.viewowner.default=<view-owner>                                
```
2. Restart the Presto server.
```
sudo systemctl restart presto-server
```
3. Update the owner in the all - database, table policy of the privacera_hive service.

Configure Hive policy authentication

When the Privacera Plugin is deployed in your PrestoSQL server, the HIVE_POLICY_AUTHZ_ENABLED is set to true by default, allowing you to configure Hive policy authorization.

You can enable or disable the authorization in your PrestoSQL server. To configure, do the following:

Go to the Ranger PrestoSQL config folder.

cd /opt/privacera/plugin/ranger-x-x-x-x-presto-plugin

Run the following command:
```
vi install.properties
```
Add or edit the following property. By default, the value is set to true.
```
HIVE_POLICY_AUTHZ_ENABLED=true            
```
Run the following command:
```
./enable-presto-plugin.sh
```
Restart the PrestoSQL server.
```
sudo systemctl restart presto-server
```

Trino

Start Trino shell.
```
trino-cli --catalog hive
```

Create the schema using admin/superuser.

CREATE SCHEMA customer WITH (location = 's3a://${SECURE_BUCKETNAME}/trino_data/schema/customer’);
use customer;

Create the table using admin/superuser.

use customer;

CREATE TABLE customer_data(
id varchar,
name varchar,
ssn varchar,
email_address varchar,
address varchar)
WITH (
    format = 'textfile',
    external_location = 's3a://${SECURE_BUCKETNAME}/trino_data/table/customer_data'
    );

Exit from Trino-CLI and switch to {TEST_USER} and kinit and try sample policy.

trino-cli --catalog hive
use customer;
SELECT * FROM customer_data LIMIT 10;

Data_Admin access

Prerequisites

You need DATA_ADMIN permission in Ranger
The source table requires the DATA_ADMIN Ranger policy.

Use case

You have the employee_db database with two tables containing the following data:

#Requires create privilege on the database enabled by default;
create schema if not exists employee_db;

In Privacera Portal select Access Management, then from the list of resource policy groups select privacera_hive which is under SQL. Then click +ADD NEW POLICY.
For the Policy Detail:
- Policy Type: Access
- Policy Name: Employees Schema Create Permission
- Database: employee_db
- Table: *
- Column: *
Under Allow Conditions:
- Select User: trino
- Permissions: Create
Click SAVE.

Create two tables.
```
#Requires create privilege on the table level;

CREATE TABLE IF NOT EXISTS employee_db.employee_data(id int, userid string, country string);

CREATE TABLE IF NOT EXISTS employee_db.country_region(country string, region string);    
```
1. In Privacera Portal, create a policy with the following Policy Detail:
  - Policy Type: Access
  - Policy Name: Employee Table Create Permission
  - Database: employee_db
  - Table: employee_data, country_region
  - Column: *
2. Under Allow Conditions:
  - Select User: trino
  - Permissions: Create

Insert test data.

#Requires update privilege on the table level;

insert into employee_db.country_region values ('US','NA'), ('CA','NA'), ('UK','UK'), ('DE','EU'), ('FR','EU');
insert into employee_db.employee_data values (1,'james','US'),(2,'john','US'), (3,'mark','UK'), (4,'sally-sales','UK'),(5,'sally','DE'), (6,'emily','DE');

In Privacera Portal, create a policy with the following Policy Detail:
- Policy Type: Access
- Policy Name: Employee Table Insert Permission
- Database: employee_db
- Table: employee_data, country_region
- Column: *
Under Allow Conditions:
- Select User: trino
- Permissions: update, Create

Create a view of above two tables created. You will get an ERROR like the following:
```
Query 20210223_051227_00005_nyxtw failed: Access Denied: Cannot create view tbl_view_5
```
You need Create View permission.
In Privacera Portal, create a policy with the following Policy Detail:
- Policy Type: Access
- Policy Name: Employee Create View Permission
- Database: employee_db
- Table: tbl_view_1
- Column: *
Under Allow Conditions:
- Select User: trino
- Permissions: Create
After granting Create View permission, the query will return the following error message:
```
Query 20210223_050930_00004_nyxtw failed: Access Denied: User [emily] does not have [DATA_ADMIN] privilege on [hive/employee_db/employee_data]
```
You need to grant Data_Admin permission for both the tables as mentioned as follows and execute the create view query again.
In Privacera Portal, create a policy with the following Policy Detail:
- Policy Type: Access
- Policy Name: Employee Create View Permission - Data_admin
- Database: employee_db
- Table: employee_data, country_region
- Column: *
Under Allow Conditions:
- Select User: trino
- Permissions: update, Create, Data_admin
Note
Granting Data_admin privileges on the resource implicitly grants Select privilege on the same resource as well.

Alter view

Create view

trino:customer> create view tbl_view_1 as SELECT * FROM tbl_1;
CREATE VIEW
trino:customer> SELECT * FROM tbl_view_1;
c0 |   c1   |    c2     |          c3           |           c4
----+--------+-----------+-----------------------+------------------------
2  | James  | 892821225 | james@walt.com        | 4578 Extension xxx
1  | Dennis | 619821225 | thomasashley@walt.com | 9478 Anthony Extension
3  | Sally  | 092341225 | sally@walt.com        | 5678 Extension xyxx
(3 rows)


Query 20210303_142252_00006_g76nu, FINISHED, 1 node
Splits: 19 total, 19 done (100.00%)
1.86 [3 rows, 169B] [1 rows/s, 91B/s]

Alter view

trino:customer> CREATE OR REPLACE VIEW tbl_view_1 as SELECT * FROM tbl_3;
CREATE VIEW
trino:customer> SELECT * FROM tbl_view_1;
slno | name | mobile |  email  | address
------+------+--------+---------+---------
1    | emily |   1234 | s@s.com | in
(1 row)

Query 20210303_142341_00009_g76nu, FINISHED, 1 node
Splits: 17 total, 17 done (100.00%)
0.91 [1 rows, 0B] [1 rows/s, 0B/s]

Rename view

trino:customer> alter view tbl_view_1 rename to tbl_view_2;
RENAME VIEW
trino:customer>

Drop view

trino:customer> drop view tbl_view_1;
DROP VIEW
trino:customer>

Row level filter

trino:employee_db> SELECT * FROM tbl_1;

    id |   userid    | country
    ----+-------------+---------
    1 | james       | US
    2 | john        | US
    3 | mark        | UK
    4 | sally-sales | UK
    5 | sally       | DE
    6 | emily       | DE
    (6 rows)

    Query 20210309_060602_00022_5amn7, FINISHED, 1 node
    Splits: 17 total, 17 done (100.00%)
    4.11 [6 rows, 0B] [1 rows/s, 0B/s]

In Privacera Portal, create a policy with the following Policy Detail:
- Policy Type: Row Level Filter
- Policy Name: Employee Row Level Filter by Country
- Hive Database: employee_db
- Hive Table: tbl_view_1
Under Row Level Conditions:
- Select User: trino
- Permissions: select
- Row Level Filter: country=US

trino:employee_db>
    trino:employee_db> SELECT * FROM tbl_1;
    id | userid | country
    ----+--------+---------
    1 | james  | US
    2 | john   | US
    (2 rows)

    Query 20210309_061202_00024_5amn7, FINISHED, 1 node
    Splits: 17 total, 17 done (100.00%)
    0.45 [6 rows, 0B] [13 rows/s, 0B/s]

Column masking

trino:employee_db> SELECT * FROM tbl_1;
id |   userid    | country
----+-------------+---------
1 | james       | US
2 | john        | US
3 | mark        | UK
4 | sally-sales | UK
5 | sally       | DE
6 | emily       | DE
(6 rows)

Query 20210309_062000_00027_5amn7, FINISHED, 1 node
Splits: 17 total, 17 done (100.00%)
0.30 [6 rows, 0B] [20 rows/s, 0B/s]

In Privacera Portal, create a policy with the following Policy Detail:

Policy Type: Masking
Policy Name: Employees Columns Masking Country
Hive Database: employee_db
Hive Table: tbl_view_1
Hive Column: country

Under Masking Conditions:

Select User: trino
Permissions: select
Select Masking Option: Nullify

trino:employee_db>
    trino:employee_db> SELECT * FROM tbl_1;
    id |   userid    | country
    ----+-------------+---------
    1 | james       | NULL
    2 | john        | NULL
    3 | mark        | NULL
    4 | sally-sales | NULL
    5 | sally       | NULL
    6 | emily       | NULL
    (6 rows)

    Query 20210309_061856_00026_5amn7, FINISHED, 1 node
    Splits: 17 total, 17 done (100.00%)
    0.32 [6 rows, 0B] [18 rows/s, 0B/s]

Access views in AWS Athena

Use the following steps to provide access for views created in AWS Athena. As a result, you will be able to query the views.

Copy the Hive catalog properties (or create a symlink) as awsdatacatalog.properties in /etc/trino/conf/catalog folder.
```
ln -s /etc/trino/conf/catalog/hive.properties /etc/trino/conf/catalog/awsdatacatalog.properties         
```
Restart the Trino server.
```
sudo systemctl restart trino-server
```
In Access Management > Resource Policies, update the privacera_hive default policy.
1. Edit all - database, table policy.
2. In Select User, add 'Trino' from the dropdown as the default view owner, and save.
(Optional) To change the default view owner from 'Trino' to any other owner such as 'Hadoop', do the following:
1. In the access-control.properties file, add the owner to the ranger.policy.authorization.viewowner.default variable.
```
vi/usr/lib/trino/etc/access-control.propertiesranger.policy.authorization.viewowner.default=<view-owner>           
```
2. Restart the Trino server.
```
sudo systemctl restart trino-server
```
  Accordingly, update the owner in the all - database, table policy of the privacera_hive service.

Hue

SSH to the master node.

Edit the hue.ini file.

sudo vi /etc/hue/conf/hue.ini

For PrestoDB

In the interpreters > presto section, set the user to empty ("") so that it uses the credentials of a Hue logged-in user for authorization.

[[interpreters]]

  [[[presto]]]
    interface = jdbc
    name = Presto
    options = '{"url": "jdbc:presto://${master_node_dns}:8889/hive/default", "driver": "com.facebook.presto.jdbc.PrestoDriver", "user":"","password":""}'

For PrestoSQL

In the interpreters > presto section, set the user to empty ("") so that it uses the credentials of a Hue logged-in user for authorization.

[[interpreters]]

  [[[presto]]]
    interface = jdbc
    name = Presto
    options = '{"url": "jdbc:presto://${master_node_dns}:8889/hive/default", "driver": "io.prestosql.jdbc.PrestoDriver", "user":"","password":""}'

For Trino

In the interpreters > trino section, set the user to empty ("") so that it uses the credentials of a Hue logged-in user for authorization.

[[interpreters]]

  [[[trino]]]
    interface = jdbc
    name = Trino
    options = '{"url": "jdbc:trino://${master_node_dns}:8889/hive/default", "driver": "io.trino.jdbc.TrinoDriver", "user":"","password":""}'

For SparkSQL
In the spark section, replace sql_server_host with the DNS name of the EMR master node.
```
[spark]
  sql_server_host=${master_node_dns}
```

Restart the Hue service.
```
sudo systemctl restart hue.service
```
Login to Hue console through /<master-node>:8888
Set the Admin username and password.
Add more Hue users through the Admin console.
Logout and login using the newly created user in Hue console.
Access the tables through Hive/Presto.
Check in Privacera Ranger, to ensure username is the same as the user logged in to Hue.

Livy

Setup Livy and Zeppelin.
SSH with port forwarding or open 8890 port to access Zeppelin from the web browser.
```
ssh -i ${KEY_FILE}  -L 8890:localhost:8890
hadoop@${EMR_PUBLIC_DNS}
```
Go to Zeppelin web UI (http://localhost:8890)

Enable the user based login (https://zeppelin.apache.org/docs/0.6.2/security/shiroauthentication.html).

sudo su
cp /etc/zeppelin/conf/zeppelin-site.xml.template /etc/zeppelin/conf/zeppelin-site.xml
chown zeppelin:zeppelin /etc/zeppelin/conf/zeppelin-site.xml

vi /etc/zeppelin/conf/zeppelin-site.xml

#Change the property, if exists
#This property removed from zeppelin 0.9.0 (https://issues.apache.org/jira/browse/ZEPPELIN-4489)
zeppelin.anonymous.allowed=false

cp /etc/zeppelin/conf/shiro.ini.template /etc/zeppelin/conf/shiro.ini

vi /etc/zeppelin/conf/shiro.ini

#Add required users in [users] as below  --
[users]
hadoop = hadoop123, admin

chown zeppelin:zeppelin /etc/zeppelin/conf/shiro.ini

Check Livy port using the following command.

vi /etc/livy/conf/livy.conf
livy.server.port=8998

Stop and restart Zeppelin.
```
sudo stop zeppelin

sudo start zeppelin
```
Go to /<master-node>:8890. Login with the required username/password which you have created in step 3.
Go to Settings > Interpreter > Livy > Edit and perform the following steps:
1. Keep only Scope with per user.
2. Set the following properties:
  - livy.spark.driver.cores=1
  - livy.spark.driver.memory=1g
  - livy.spark.executor.cores=1
  - livy.spark.executor.instances=2
  - livy.spark.executor.memory=1g
  - livy.spark.driver.extraClassPath=/opt/privacera/plugin/privacera-spark-plugin/spark-plugin/*:{copy spark.driver.extraClassPath from /etc/spark/conf/spark-defaults.conf}
Save and restart.
Run the sample Livy Spark code.
1. Go to Zeppelin web UI (http://localhost:8890).
2. Create a new notebook using the following command:
```
%livy.spark

val df =spark.read.csv("s3://${SECURE_BUCKET_NAME}/sample_data/customer_data/customer_data_without_header.csv");
df.show()
```
3. Check audit for the above executed command in Privacera Access Manager:
  1. On the Privacera Portal home page, expand Access Management.
  2. On the left menu, click Audit.
    The Audit page will be displayed with Ranger Audit details.

Spark Object-Level Access Control (OLAC)

To enable Spark OLAC:

Submit Spark applications

You can submit an application consisting of compiled and packaged Java or Spark JAR. You can deploy the JAR locally (client) or cluster.

Client Mode

SSH to the master node.
Run the following command:

spark-submit \
--master yarn \
--driver-memory 512m \
--executor-memory 512m \
--class <clas-to-run> <your-jar> <arg1> <arg2>

Cluster Mode

SSH to the master node.
Run the following command:

spark-submit \
--master yarn \
--deploy-mode cluster \
--driver-memory 512m \
--executor-memory 512m \
--driver-class-path "/opt/privacera/plugin/privacera-spark-plugin/spark-plugin/*:<copy spark.driver.extraClassPath from /etc/spark/conf/spark-defaults.conf>"\
--class <clas-to-run> <your-jar> <arg1> <arg2>

Spark Fine-grained Access Control (FGAC)

View-level access

To enable the view-level access control:

SSH to the master node of EMR cluster.

Edit the spark-defaults.conf file.

sudo vim /etc/spark/conf/spark-defaults.conf

Add the following property.

spark.hadoop.privacera.spark.view.levelmaskingrowfilter.extension.enable true

Privacera Documentation

Table of ContentsTable of Contents

EMR user guide for Privacera Platform

Hive

Data_Admin access

Note

Alter view

Rename view

Drop view

Row level filter

Column masking

PrestoDB

Note

PrestoSQL

Data_Admin Access

Note

Alter view

Rename view

Drop view

Row level filter

Column masking

Access views in AWS Athena

Configure Hive policy authentication

Trino

Data_Admin access

Note

Alter view

Rename view

Drop view

Row level filter

Column masking

Access views in AWS Athena

Hue

Livy

Spark Object-Level Access Control (OLAC)

Submit Spark applications

Spark Fine-grained Access Control (FGAC)

View-level access