大数据数据治理及数据安全

1© 2014 Cloudera, Inc. All rights reserved.
Data Governance and Protection
in Hadoop
Jianwei Li
jarred@cloudera.com
Introduction of Cloudera Navigator

Agenda
• Hadoop Security Pillars
• Metadata Management and Data Audit
• Data Security at Rest and in Transit

Hadoop Ecosystem
OPERATIONS
Cloudera Manager
Cloudera Director
DATA
MANAGEMENT
Cloudera Navigator
Encrypt and KeyTrustee
Optimizer
STRUCTURED
Sqoop
UNSTRUCTURED
Kafka, Flume
PROCESS, ANALYZE, SERVE
UNIFIED SERVICES
RESOURCE MANAGEMENT
YARN
SECURITY
Sentry, RecordService
FILESYSTEM
HDFS
RELATIONAL
Kudu
NoSQL
HBase
STORE
INTEGRATE
BATCH
Spark, Hive, Pig
MapReduce
STREAM
Spark
SQL
Impala
SEARCH
Solr
SDK
Kite

The Benefits of Hadoop...
One place for unlimited data
• All types
• More sources
• Faster, larger ingestion
Unified, multi-framework data access
• More users
• More tools
• Faster changes

…Can Create Information Security Challenges
Business Manager
• Run high value
workloads in cluster
• Quickly adopt new
innovations
Information Security
• Follow established
policies and
procedures
• Maintain compliance
IT/Operations
• Integrate with existing
IT investments
• Minimize end-user
support
• Automate
configuration

Hadoop Security Pillars
Authentication, Authorization, Audit, and Compliance
Access
Defining what users and
applications can do with
data
Technical Concepts:
Permissions
Authorization
Data
Protecting data in the
cluster from
unauthorized visibility
Technical Concepts:
Encryption, Tokenization,
Data masking
Visibility
Reporting on where data
came from and how it’s
being used
Technical Concepts:
Auditing
Lineage
Cloudera Manager
Apache Sentry &
RecordService
Cloudera Navigator
Navigator Encrypt & Key
Trustee | Partners
Perimeter
Guarding access to the
cluster itself
Technical Concepts:
Authentication
Network isolation

Agenda

Data Management Challenges
Compliance
Officers
• Who’s accessing
what data?
• What are they doing
with the data?
• Is sensitive data
governed and
protected?
• Can I meet
compliance needs?
Data
Stewards/Curators
• How can I manage
data from ingest to
purge?
• How do I classify data
efficiently?
• How can data be
made available to
end-users?
Business Users
• How do I find what’s
relevant?
• Can I trust what I
find?
• How can I explore
data on my own?
Database Admins
• How is data being
used today?
• How can I optimize
for future workloads?
• How can I take
advantage of Hadoop
risk-free and fast?

Cloudera Navigator
• Metadata Management
• Audit
• Policy Based Data
Management
• Data Analytics
The only integrated data management and governance platform for Hadoop

Navigator Metadata Architecture

Metadata Extraction
• HDFS - Extracts HDFS metadata at the next scheduled extraction run after an
HDFS checkpoint.
• Hive - Extracts database and table metadata from the Hive Metastore Server.
• Impala - Extracts database and table metadata from the Hive Metastore Server.
Extracts query metadata from the Impala Daemon lineage logs.
• MapReduce - Extracts job metadata from the JobTracker

Metadata Extraction
• Oozie - Extracts Oozie workflows from the Oozie Server.
• Pig - Extracts Pig script runs from the JobTracker or Job History Server.
• Spark - Extracts Spark job metadata from YARN logs.
• Sqoop 1 - Extracts database and table metadata from the Hive Metastore Server.
Extracts job runs from the JobTracker or Job History Server.
• YARN - Extracts job metadata from the ResourceManager.

Metadata Indexing
• Metadata is indexed to Solr for searching
• Technical metadata key-value pairs, for example, “fileSystemPath:/tmp/hbase-staging”
• Custom metadata key-value pairs, for example, “description:Banking*”
• Hive extended attribute key-value pairs,
• ALTER TABLE table_name SET TBLPROPERTIES ('key1'='value1');
• (sourceType:hive OR sourceType:hdfs) AND (type:table OR type:directory)

Self-Service Data Discovery & Analytics
For Business Users
Effortlessly find and trust
the data that matters
most
• Search across unified metadata repository
• Gain context and visibility into data sets
• Find similar, relevant data

Technical & Business Metadata

Modifying Metadata
• HDFS file
• /user/test/file1.txt
• /user/test/.file1.txt.navigator
{ "name" : "aName",
"description" : "a description",
"properties" : { "prop1" : "value1", "prop2" : "value2" },
"tags" : [ "tag1" ]
}
• REST:
http://Navigator_Metadata_Server_host:port/api/v
8/entities/ -u username:password -X POST -H
"Content-Type: application/json" -d '{properties}'

Navigator Analytics
• Metadata - the number of files by
creation and access times, size, block
size, and replication count.
• Audit
– Activity tab - by directory which files
have been accessed using the open
operation and how many times they have
been accessed.
– Top Users tab - the top-n commands
and the top-n users and top n commands
those users performed

Navigator Audit Architecture

Compliance-Ready Governance & Protection
For Compliance Officers
Track, understand, and
protect access to
sensitive data
• Search centralized audits for the entire
ecosystem
• See how data is used and changing with
intuitive lineage
• Protect all data with high-performance
encryption and key management
• Integrate with leading partner tools

Policy Based Data Management
• Automate data stewardship and curation
activities with the policy engine
• Data archive
• Data delete
• Metadata management
• automatic naming with timestamp:
entity.get(FSEntityProperties.ORIGINAL_NAME,
Object.class) + " - "
+ new SimpleDateFormat("yyyy-MM-
dd").format(entity.get(FSEntityProperties.CREATED,
Instant.class).toDate())
• Ensured business continuity through built-in
backup & disaster recovery
• Integrate with leading partner tools

Lineage
• Lineage provides provenance information to show where data came from and
how it has been transformed within the EDH
• Cloudera Navigator provides column-level lineage within Cloudera EDH
• Integrates with certified third party lineage solutions, such as Informatica, for
enterprise-wide lineage information

Lineage

End-to-End Data Management
Cloudera Navigator + Partners
Lineage Auditing Metadata
AugmentationConsumption

Agenda

Background
• Our customers are increasingly wanting to use HDFS to store sensitive data
• Customers often are mandated to protect data at rest
• National Security
• Company confidential
• Encryption of data at rest helps mitigate certain security threats
• Rogue administrators (insider threat)
• Lost/stolen hard drives

Over the Wire Encryption
• Uses certificates and TLS to encrypt and optionally authenticate network
communication
• Customers can use commercial certificate authorities, corporate CAs, or self-
signed certificates
• Active Directory Certificate Services is commonly used by customers
• Secures Hadoop data processing components as well as Cloudera Manager
agents and management services

Data at Rest Encryption
• Protects data on disk from unauthorized exposure
• Protects the data from both online attacks while the system is running as well as
offline attacks such as stealing physical drives
• HDFS transparent encryption at rest is an open source technology available in
Apache Hadoop
• Navigator Encrypt is a proprietary technology that protects data outside HDFS
• Backend databases, log directories, temp directories, landing zones
• Navigator KeyTrustee Server is a proprietary key management server that can
integrate with an enterprise HSM

HDFS Encrypt + Navigator Encrypt + Key Trustee

Navigator Key Trustee Architecture

Key Management Service (KMS)
• When encrypting any data it is important to securely store your encryption
keys away from the encrypted data
• KMS is a Key Management Service for HDFS Encryption to store and retrieve
encryption keys
• KMS is open source and provides a standard interface for pluggable key
providers
• The default key provider for KMS is the Java Key Store
• The Java Key Store is not recommended for production key management is
meant for development and testing

Key Management Service (KMS)
● Encryption occurs on the requesting client.
○ Data is encrypted before it lands on disk.
○ The KMS encrypts and decrypts specific key components.
○ The KMS does not encrypt content.
○ The KMS does not store keys.

KMS Proxy Deployment considerations.

Navigator Key Trustee
• Navigator Key Trustee provides secure, centralized and scalable key storage
and administration
• Is not open source and licensed with Cloudera Navigator
• Is the recommended option for production deployments
• Provides the hooks to integrate with Hardware Security Modules for
physically tamper proof requirements (FIPS 140-2 level 3)
• Also provides centralized Key Management for Navigator Encrypt

• Customers may choose to use Hardware Security Modules (HSM) to improve the
security of their Key store.
• Key HSM is a universal Hardware Security Module (HSM) driver.
• It acts as a translator between the target HSM Platform and Key Trustee.
Key HSM

Hardware Security Module (HSM)
• There are a number of vendors out there that provide this.
• They exists as appliances and attachable physical hardware.
• If one is configured with Key Trustee it will be used as a Root of Trust.
• Data inside of the Key Trustee Keystore will be encrypted by this Root of Trust.
• The HSM "master" keys are generated in the HSM and never leave the HSM.

Keys Used in Encryption at Rest
HDFS Encryption
• Encryption Zone Key (EZKEY)
• This key much like a mount key is associated with an encryption
zone in HDFS.
• Encrypted Data Encryption Key (EDEK)
• This is an encrypted copy of a Data Encryption Key.
• Data Encryption Key (DEK)
• This is the real data encryption key used to encrypt data stored
within a file, zone, or block device. This particular key concept is
used in both Navigator Encrypt and HDFS Transparent Data
Encryption (TDE).

Keys Used in Encryption at Rest
(1) When an EZ is created, the administrator specifies an
encryption zone key (EZ Key) that is already stored in the
backing keystore. The EZ Key encrypts the data encryption
keys (DEKs) that are used in turn to encrypt each file. DEKs
are encrypted with the EZ key to form an encrypted data
encryption key (EDEK), which is stored on the NameNode via
an extended attribute on the file
(2) To encrypt a file, the client retrieves a new EDEK from the
NameNode, and then asks the KMS to decrypt it with the
corresponding EZ key. This step results in a DEK
(3) the client uses a DEK to encrypt their data (3).
(4)To decrypt a file, the client needs to again decrypt the file’s
EDEK with the EZ key to get the DEK (2). Then, the client
reads the encrypted data and decrypts it with the DEK .

HDFS Encryption, Writing a File
HDFS
KMS
Client
To Trustee
2 3
6
7
1
5
8
1. create file
2. generate key
3. encrypted key
4. store encrypted
key
5. file handle &
encrypted key
6. decrypt
encrypted key
7. decrypted key
8. encrypt & write data
4

HDFS Encryption, Reading a File
HDFS
KMS
Client
To Trustee
3
4
1
2
5
1. open file (passed read
permission check)
2. file handle &
encrypted key
3. decrypt
encrypted key
4. decrypted key
5. read & decrypt data

Enabling HDFS Encryption on a Cluster
• Need recent version of libcrypto.so on HDFS and MapReduce client hosts
• To check use the following command: hadoop checknative
Output
openssl: true /usr/lib64/libcrypto.so
• yum install openssl openssl-devel
• openssl package installs the library, openssl-devel creates the libcrypto.so
symlink (you can manually create this as well)
• Openssl provides AES-NI integration for Intel hardware

Enabling HDFS Encryption on a Cluster
Using Cloudera Manager
1) Adding the KMS Service - add service Java KeyStore KMS on a host
2) Enabling Java KeyStore KMS for the HDFS Service
• HDFS service – configuration tab
• Scope > HDFS (Service-Wide)
• Category > All
• KMS Service property – turn on radio button
SAVE CHANGES
Restart Cluster
Deploy Client Configuration.

Creating Encryption Zones
• Use the hadoop key and hdfs crypto command-line tools to create encryption keys and set up
new encryption zones.
# Create an encryption key for your zone as the application user that will be using the key
$ hadoop key create myKey
# Create a new empty directory and make it an encryption zone
$ hadoop fs -mkdir /zone
$ hdfs crypto -createZone -keyName myKey -path /zone
# To see the key zones
$ hdfs crypto –listZones

Adding Files to an Encryption Zones
Remember they start empty! You cannot create a Zone in directories with data
hadoop distcp /user/dir /user/enczone
• By default, distcp compares checksums provided by the filesystem to verify that
data was successfully copied to the destination.
• When copying between an unencrypted and encrypted location, the filesystem
checksums will not match since the underlying block data is different.
• Use -skipcrccheck and -update flags to avoid verifying checksums.
• Also use the distcp flags to preserve all attributes (-prbugpcaxt)

Unified Governance Foundation
Unified Auditing Comprehensive Lineage Unified Metadata Universal Policies
Search
Define
Analyze
Profile
Self-Service Discovery
& Analytics
Effortlessly find and trust the
data that matters most
Audit
Track
Encrypt
Manage Keys
Compliance-Ready
Governance & Protection
Track, understand, and protect
access to sensitive data
Report
Optimize
Migrate
Maintain Models
Active Data
Optimization
Configure Hadoop to boost
user productivity
Classify
Steward
Backup
Retain
Hadoop-Scale Data Lifecycle
Management
Maximize cluster performance
at Hadoop scale with ease
Cloudera Navigator
The only integrated data management and governance platform for Hadoop

Challenge: All applications, databases, or file
systems that have the potential to handle
personal account-related data must undergo full
PCI certification
Solution: MasterCard’s Cloudera environment
fully conforms to the PCI-DSS V 2.0 security
standards so it can host PCI datasets and
potentially integrate with other internal systems
MasterCard
Cloudera: The first PCI-Certified
Hadoop Platform
Data privacy and protection is a top priority
for MasterCard. As we maximize the most
advanced technologies from partners and
vendors, they must meet the rigorous
security standards we’ve set. With Cloudera’s
commitment to the same standards, we
now have additional options in how we
manage our data center.”Gary VonderHaar
Chief Technology Officer,
Architecture
MasterCard

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