About Release 7.8.0
This site contains documentation for HPE Ezmeral Data Fabric release 7.8.0, including installation, configuration, administration, and reference content, as well as content for the associated ecosystem components and drivers.
7.8.0 Installation
This section contains information about installing and upgrading HPE Ezmeral Data Fabric software. It also contains information about how to migrate data and applications from an Apache Hadoop cluster to a HPE Ezmeral Data Fabric cluster.
7.8.0 Data Fabric
HPE Ezmeral Data Fabric is the industry-leading data platform for AI and analytics that solves enterprise business needs.
7.8.0 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 data-fabric 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 HPE Ezmeral Data Fabric clusters.
- Administering Files and Directories
- Administering Tables
  Administration of the HPE Ezmeral Data Fabric Database is done primarily via the command line (maprcli) or with the Managed Control System (MCS). Regardless of whether the HPE Ezmeral Data Fabric Database table is used for binary files or JSON documents, the same types of commands are used with slightly different parameter options. HPE Ezmeral Data Fabric Database administration is associated with tables, columns and column families, and table regions.
- Administering Streams
- Administering Data Fabric Gateways
  A HPE Ezmeral Data Fabric gateway mediates one-way communication between a source HPE Ezmeral Data Fabric cluster and a destination cluster. You can replicate HPE Ezmeral Data Fabric Database tables (binary and JSON) and HPE Ezmeral Data Fabric Streams streams. HPE Ezmeral Data Fabric 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.
- Managing Secure Clusters
  Provides procedures that will enable you to use Data Fabric clusters securely.
- Administering the Data Access Gateway
  The HPE Ezmeral Data Fabric Data Access Gateway is a service that acts as a proxy and gateway for translating requests between lightweight client applications and the HPE Ezmeral Data Fabric 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.
  - maprcli and REST API Syntax
    This section provides information about the HPE Ezmeral Data Fabric command API. Most commands can be run on the command-line interface (CLI), or by making REST requests programmatically or in a browser.
    - Overview
      Each command reference page includes the command syntax, a table that describes the parameters, and examples of command usage.
    - acerole validate
      Verifies given user roles for ACEs exists in the /opt/mapr/conf/m7_permissions_roles_refimpl.conf file.
    - acl
      Describes the acl commands used to access control lists (ACLs).
    - alarm
      Describes the alarm commands that perform functions related to system alarms.
    - audit
      Describes commands used to audit operations related to cluster management and data access.
    - blockaccess
      Describes commands used to include users in the blocklist and to list users who are in the blocklist.
    - cluster
      Manages cluster features, gateways, and cluster-wide settings.
    - clustergroup
      Adds, deletes and updates clusters from cluster groups/global namespace.
      - clustergroup get cgtable
        Retrieves the cluster group table information.
      - clustergroup setprimary
        Sets the primary cluster for the group.
      - clustergroup updateprimary
        Updates the primary cluster for the group.
      - clustergroup addexternal
        Imports an external NFS server or an external s3 server into a cluster group/global namespace.
      - clustergroup getnfsexports
        Displays the list of exports from the /etc/exports file of an external NFS server that has been imported into a cluster group or global namespace.
      - clustergroup remove cluster
        Removes a cluster from a cluster group.
      - clustergroup s3gns
        Sets the S3 server to redirect or forward external S3 access requests, and enables S3 global namespace.
      - clustergroup fetchchainca
        Displays location of the CA certificate chain on the specified cluster or all clusters in the cluster group.
      - clustergroup updates3user
        Updates permissions for external S3 server.
    - cluster services
      Returns the activation status and enables restoration of a disabled fabric.
    - cluster usage
      Describes the cluster usage commands that check the service activation URLs, register the cluster, and renew the activation for an air-gapped cluster.
    - config
      Lists configuration values for the Data Fabric cluster.
    - dashboard info
      Displays a summary of information about the cluster.
    - dialhome
    - disk
      Lists disk parameters.
    - dump
      Returns key information about volumes, containers, storage pools, and Data Fabric cluster services for debugging and troubleshooting.
    - entity
      Manages entities (users and groups).
    - fid
      Displays information about HPE Ezmeral Data Fabric Database or file-system components that are identified by a FID.
    - file
      Lets you perform tiering operations at the file level.
    - filefilter
      Creates and modifies filters to restrict certain file types from being stored on specified volumes.
    - insight
      Describes the maprcli command to enable insights and get information related to insights.
    - installer
      Describes commands for the as-a-service HPE Ezmeral Data Fabric cluster installation and removal.
    - job
      Manages Hadoop jobs running on the cluster.
    - license
      Manages Data Fabric licenses.
    - label
      Manages registration and modification of labels.
    - nfsmgmt
      Refreshes NFS exports and server cache.
    - nfs4mgmt
      Manages NFSv4 server.
    - node
      Manages nodes in the cluster
    - otel
      Commands for managing Open Telemetry (OTel) end points.
    - rlimit
      Manages resource usage limits for the cluster.
    - schedule
      Manages schedules.
    - security
    - service list
      Lists all services on the specified node, the memory allocated for each service, the state of each service, and log path for each service.
    - setloglevel
      Sets log level on individual services.
    - stream
      Manages stream functionality.
    - kafkatopic
      Displays help for the maprcli commands related to Kafka topics that are available in Data Fabric.
    - s3domain
      Commands for managing HPE Ezmeral Object Store domains.
    - s3keys
      Commands for managing HPE Ezmeral Object Store access and secret keys.
    - table
      Performs functions related to HPE Ezmeral Data Fabric Database tables.
    - tier
      Lets you create, modify, remove, and retrieve list of tiers and tiering rules.
    - trace
      Lets you view and modify the trace buffer, and the trace levels for the system modules.
    - urls
      Displays the status page URL for the specified service.
    - virtualip
      Manages virtual IP addresses for NFS nodes.
    - volume
      Manages volumes, snapshots and mirrors.
    - insight
      Describes the maprcli command to enable insights and get information related to insights.
  - MinIO Client (mc) Commands
    Lists mc commands that you can use to perform operations, such as creating and editing buckets and accounts in HPE Ezmeral Data Fabric Object Store.
  - Utilities
    Contains information about various scripts and utilities, that help setup, maintain, and monitor clusters.
  - Configuration Files
    This section contains reference information about various configuration files.
  - Alarms Reference
    The pages in this section provide details about all of the types of alarms.
  - HPE Ezmeral Data Fabric Environment
    This section provides information associated with the Data Fabric environment.
- Troubleshooting Cluster Administration
  Lists the common errors and their solutions.
- Best Practices for Backing Up HPE Ezmeral Data Fabric Information
  Lists the best practices and performance considerations to follow when backing up HPE Ezmeral Data Fabric information.
- IPv6 Support in Data Fabric
  Describes the IPv6 support feature for Data Fabric.
7.8.0 Development
This section contains information related to application development for Ezmeral ecosystem components and HPE Ezmeral Data Fabric products, including the file system, Database (Key-Value and JSON), and Event Streams.
Other Docs
This section contains release-independent information, including: Installer documentation, Ecosystem release notes, interoperability matrices, security vulnerabilities, and links to other data-fabric version documentation.
Glossary
Definitions for commonly used terms in MapR Converged Data Platform environments.

clustergroup fetchchainca

Displays location of the CA certificate chain on the specified cluster or all clusters in the cluster group.

When it comes to a cluster group, there are multiple clusters in the cluster group. One or more external S3 servers could be a part of the cluster group if they are imported into Data Fabric.

A CA certificate is the means for a S3 client will to connect to a cluster or to an external S3 server in a cluster group.

Every cluster or fabric has a CA certificate that is signed by HPE.

You could have generated a combined CA certificate or a CA certificate chain for multiple fabrics/ clusters that are part of the global namespace or cluster group. The CA certificate chain is retrieved from cldb of the primary cluster.

If you wish to add an external s3 server to cluster group, you would require the certificate of external s3 server to be stored on the cldb of the primary server.

Use the

clustergroup
                fetchchainca

CLI command to display the location of the CA certificate chain for the specified cluster in a cluster group or all clusters in the cluster group.

By default, the CA certificate chain is saved in /tmp/chain-ca.pem.

Once you have the location of the CA certificate chain, you can copy it to the desired location.

Syntax

CLI

maprcli clustergroup fetchchainca
   [ - clustername name of the cluster]
   [ - allclusters all clusters <true|false> ]

Request Type	POST
Request URL	`http[s]://<host>:<port>/rest/clustergroup/fetchchainca?<parameter>`

Options

Option	Description
`clustername`	(Required if `allclusters` option is not specified) The name of the cluster for which the CA certificate chain path is to be displayed.
`allcluster`	(Required if `clustername` option is not specified) Permissible values for this option are `true` and `false`. Use `true` to display the CA certificate chain path for all clusters in the cluster group.

Example

Display CA certificate chain path for cluster-one in a clustergroup

CLI

maprcli clustergroup fetchchainca -clustername cluster-one

REST

curl -u <username> -X GET https://server.sj.us:8443/rest/clustergroup/fetchchainca?clustername=cluster-one

Display CA certificate chain path for all clusters in the cluster group

CLI

maprcli clustergroup fetchchainca -allclusters true

REST

curl -u <username> -X GET https://server.sj.us:8443/rest/clustergroup/fetchchainca?allclusters=true

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HPE Ezmeral Data Fabric – Customer-Managed 7.8.0 Documentation
Abstract	This site contains documentation for the customer-managed platform of the HPE Ezmeral Data Fabric version 7.8.0 including installation, configuration, administration, and reference content, as well as content for the associated bundled ecosystem components and drivers.
Published	September 2024
Edition	7.8.0