HPE Ezmeral Data Fabric 6.1.x is In Maintenance and transitions to "End of Maintenance" in June 2024. Please see the latest documentation.

About MapR 6.1
This site contains the main documentation for Version 6.1 of the MapR Converged Data Platform, including installation, configuration, administration, and reference information.
6.1 Installation
This section contains information about installing and upgrading MapR software. It also contains information about how to migrate data and applications from an Apache Hadoop cluster to a MapR cluster.
6.1 MapR Data Platform
MapR Data Platform is the industry-leading data platform for AI and analytics that solves enterprise business needs.
6.1 Administration
This section describes how to manage the nodes and services that make up a cluster.
- Administering Users and Clusters
  Lists topics that help manage a MapR cluster.
- Administering Nodes
  Provides a synopsis of managing nodes in a cluster.
- Administering Volumes
  This section provide information about how to organize and manage data using volumes, a unique feature of MapR clusters.
- Administering Files and Directories
- Administering Tables
  Administration of the MapR Database is done primarily via the command line (maprcli) or with the Managed Control System (MCS). Regardless of whether the MapR Database table is used for binary files or JSON documents, the same types of commands are used with slightly different parameter options. MapR Database administration is associated with tables, columns and column families, and table regions.
- Administering Streams
- Administering MapR Gateways
  A MapR gateway mediates one-way communication between a source MapR cluster and a destination cluster. You can replicate MapR Database tables (binary and JSON) and MapR Event Store For Apache Kafka streams. MapR gateways also apply updates from JSON tables to their secondary indexes and propagate Change Data Capture (CDC) logs.
- Administering Services
- Monitoring the Cluster
  This section describes how to monitor the health and performance of a MapR cluster.
- Configuring Security
  Describes how to configure security and manage secure clusters.
  - Configuring Data-Fabric Security
    Provides usage information for frequently used security functionality, including Access Control Lists (ACLs), Access Control Expressions (ACEs), file permissions, and subnet whitelisting.
    - Getting Started with MapR Security
      Describes quick implementation of security.
    - Managing Encryption for MapR Core
      Provides information that allows you to use encryption across the MapR platform.
    - Determining if a Cluster is Secure and Enabled for Encryption
      Explains how to use the Control System, the CLI, and REST API to determine whether a cluster is secure and whether on-wire encryption and data-at-rest encryption are enabled at the cluster and volume levels.
    - Configuring Authentication
      Provides information about MapR ticket, Kerberos, Pluggable Authentication Module (PAM) authentication.
    - Managing Access Controls
      Describes how to create, enable, and use ACLs and ACEs.
    - Customizing Security in MapR
      Describes the .customSecure file and how MapR 6.x handles custom security settings.
  - Managing Impersonation
    Provides instructions for enabling and using MapR impersonation features.
- Managing Secure Clusters
  Provides procedures that will enable you to use MapR clusters securely.
- Administering the MapR Data Access Gateway
  The MapR Data Access Gateway is a service that acts as a proxy and gateway for translating requests between lightweight client applications and the MapR cluster. This section describes considerations when upgrading the service, how to modify configuration settings, and how to administer and manage the service.
- Planning for High Availability
- Administrator's Reference
  This section contains in-depth reference information for the administrator.
- Troubleshooting Cluster Administration
  Lists the common errors and their solutions.
- Best Practices for Backing Up MapR Information
  Lists the best practices and performance considerations to follow when backing up MapR information.
6.1 Development
This section contains information related to application development for Ezmeral ecosystem components and MapR Data Platform products, including the file system, Database (Key-Value and JSON), and Event Streams.
Other Docs
This section contains release-independent information, including: MapR Installer documentation, Ecosystem release notes, interoperability matrices, security vulnerabilities, and links to other MapR version documentation.
Glossary
Definitions for commonly used terms in MapR Converged Data Platform environments.

Re-running configure.sh after Configuration

If the configure.sh script is initially run without the -genkeys option, the script generates a ssl_keystore file for use by the web server for the Control System.

Then if the configure.sh script is re-run with the -genkeys option, the system detects the existing ssl_* files and exits with an error to prevent inadvertent deletion or reuse of the ssl_keystore file.

NOTE For general information on certificates, see SSL Certificates.

To re-run configure.sh on clusters without security features enabled:

Manually delete the ssl_keystore file on each node.
Run the configure.sh -genkeys -R command.

NOTE The contents of the ssl_keystore file are unique to each node.

To re-run configure.sh on clusters where the contents of the ssl_keystore file are customized:

Run the configure.sh -genkeys -nocerts -R command to preserve your customizations.

SSL Keys Error Message

The error message will look like the following example:

/opt/mapr/server/configure.sh
        -secure -genkeys -C $CLDB_GRP -Z $ZK_GRP -RM $RM -HS
        $HISTORYSERVER
        <hostname1>: Configuring Hadoop-2.x at
        /opt/mapr/hadoop/hadoop-2.x
        <hostname1>: Done configuring Hadoop
        <hostname1>: CLDB node list:
        <hostname1>:7222,<hostname2>:7222,<hostname3>:7222
        
        <hostname1>: Zookeeper node
        list: <hostname1>:5181,<hostname2>:5181,<hostname3>:5181
        
        <hostname1>: Node setup configuration: cldb fileserver
        historyserver nfs nodemanager resourcemanager webserver
        zookeeper
        <hostname1>: Log can be found at:
        /opt/mapr/logs/configure.log
        <hostname1>: /opt/mapr/conf/ssl_keystore already exists
        <hostname1>: ERROR: could not generate ssl keys. See log file
        for more details
        clush: <hostname1>: exited with exit code 1