MapR 5.1 is at End of Life (EOL) and no longer supported. Please see the latest documentation. This documentation is not being updated.

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5.1 Administration
This section contains administration information such as managing your cluster, data, users, jobs and security information such as configuring your security environment and auditing.
Security Guide
Configuring MapR Security
Describes how to enable security features and configure the components on a secure cluster.
Configuring Impersonation
Describes how to use impersonation to centralize control over user actions.
Enabling Impersonation for the mapr Superuser
Describes how to allow a mapr superuser to impersonate users.

MapR 5.1 Documentation

5.1 Administration
This section contains administration information such as managing your cluster, data, users, jobs and security information such as configuring your security environment and auditing.
- Administrator Guide
- Security Guide
  - Security Overview
    Describes the security features of the MapR Converged Data Platform.
  - Security Architecture
    Describes the default security architecture and additional authentication and encryption capabilities.
  - Logging into a Secure Cluster
    Describes how to use tickets to access a secure MapR cluster.
  - Tickets and Certificates
    Describes how tickets and certificates authenticate users and servers to a cluster.
  - Getting Started with MapR Security
    Describes the two core scenarios that allow quick implementation of security features.
  - Configuring MapR Security
    Describes how to enable security features and configure the components on a secure cluster.
    - Enabling and Disabling Security Features on Your Cluster
      Describes how to enable and disable wire-level security on the nodes of your cluster.
    - Configuring Impersonation
      Describes how to use impersonation to centralize control over user actions.
      - How Impersonation Works
        Describes requirements for and limitations on impersonation.
      - Enabling Impersonation for the mapr Superuser
        Describes how to allow a mapr superuser to impersonate users.
      - Configuring Impersonation When Security Is Not Enabled
        Describes how to enable impersonation without enabling cluster security.
    - Running Commands on Remote Secure Clusters
      Describes how to manage multiple secure clusters from one secure cluster.
    - Adding Cross-Cluster Tickets to Secure Clusters
      Describes how to add cross-cluster tickets to secure clusters that push and pull data.
    - PAM Configuration
      Describes how to use PAM to verify passwords.
    - Secured TaskTracker
      Describes how to control user access to TaskTracker.
    - Access Control Lists
      Describes how to create different types of ACLs.
    - Access Control Expressions
      Describes how to use ACEs to control user permissions for MapR-DB tables.
    - Permissions
      Describes requirements for API user permissions and file permissions.
    - Securing Open Source Components
      Describes how to use JAAS to configure security for open source components.
    - Configuring Kerberos User Authentication
      Describes how to configure Kerberos for the CLDB.
    - Mirror Volumes and Secure Clusters
      Describes how to configure security for the source and destination clusters of a mirror.
    - Configuring a MapR Cluster to Access a HDFS Cluster
      Describes how to create a connection between a MapR cluster and an HDFS cluster.
  - Auditing of Cluster Administration and Operations on Directories, Files, Tables, and Streams
    Describes how to process and use audit records to improve data analysis.

Enabling Impersonation for the mapr Superuser

Describes how to allow a mapr superuser to impersonate users.

About this task

Follow the steps below to enable impersonation in your MapR installation.

Procedure

Open the following file in a text editor:

/opt/mapr/hadoop/hadoop-<version>/conf/core-site.xml

Add the following hadoop.proxyuser properties:
```
<property>
        <name>hadoop.proxyuser.mapr.hosts</name>
        <value>*</value>
</property><property>
        <name>hadoop.proxyuser.mapr.groups</name>
        <value>*</value>
</property>
```
The hosts setting (*) allows the mapr superuser to impersonate any user in any group.

The groups setting (*) allows the mapr superuser to connect from any host to impersonate a user.

NOTE: Do not use anything other than a single asterisk here. Other parts of MapR ignore the values here and treat them as if each is set to a single asterisk.
Close the file, saving any changes that you made.