Below is an Ansible playbook to automate the installation of HPE Ezmeral Data Fabric (formerly MapR) on a Linux cluster. This playbook assumes you have at least a basic understanding of Ansible and have set up your inventory file for your Linux cluster.

Prerequisites

1. Install Ansible on your control node.
2. Ensure passwordless SSH access from the control node to all cluster nodes.
3. Prepare an Ansible inventory file listing all the nodes in the cluster.
4. Download the HPE Ezmeral installation packages and place them in a shared or accessible location.

Inventory File (inventory.yml)

Define your 12-node cluster in the Ansible inventory file:

all:
hosts:
node1:
ansible_host: 192.168.1.101
node2:
ansible_host: 192.168.1.102
node3:
ansible_host: 192.168.1.103
# Add all 12 nodes
vars:
ansible_user: your-ssh-user
ansible_ssh_private_key_file: /path/to/your/private/key
java_package: java-11-openjdk-devel
ezmeral_packages:
- mapr-core
- mapr-fileserver
- mapr-cldb
- mapr-webserver
- mapr-zookeeper

Ansible Playbook (install_hpe_ezmeral.yml)

The playbook automates Java installation, package deployment, service configuration, and starting services.

—

– name: Install HPE Ezmeral Data Fabric on a 12-node cluster

  hosts: all

  become: yes

  vars:

    ezmeral_repo_url: “http://repo.mapr.com/releases/v7.0/redhat”

    ezmeral_repo_file: “/etc/yum.repos.d/mapr.repo”

  tasks:

    – name: Install dependencies

      yum:

        name: “{{ item }}”

        state: present

      loop:

        – epel-release

        – “{{ java_package }}”

        – wget

        – lsof

    – name: Configure HPE Ezmeral repository

      copy:

        dest: “{{ ezmeral_repo_file }}”

        content: |

          [mapr_repo]

          name=MapR Repository

          baseurl={{ ezmeral_repo_url }}

          gpgcheck=0

          enabled=1

    – name: Install HPE Ezmeral packages

      yum:

        name: “{{ item }}”

        state: present

      loop: “{{ ezmeral_packages }}”

    – name: Configure ZooKeeper on specific nodes

      block:

        – name: Create ZooKeeper data directory

          file:

            path: /var/mapr/zookeeper

            state: directory

            owner: mapr

            group: mapr

            mode: 0755

        – name: Set up ZooKeeper myid file

          copy:

            dest: /var/mapr/zookeeper/myid

            content: “{{ item }}”

            owner: mapr

            group: mapr

            mode: 0644

      when: inventory_hostname in [‘node1’, ‘node2’, ‘node3’]

      loop:

        – 1

        – 2

        – 3

    – name: Configure cluster-wide settings

      shell: |

        /opt/mapr/server/configure.sh -C node1,node2,node3 -Z node1,node2,node3

    – name: Start required services

      service:

        name: “{{ item }}”

        state: started

        enabled: yes

      loop:

        – mapr-zookeeper

        – mapr-cldb

        – mapr-fileserver

        – mapr-webserver

        – mapr-nodemanager

    – name: Verify installation

      shell: maprcli node list -columns svc

      register: verification_output

    – name: Output verification results

      debug:

        var: verification_output.stdout

---

Execution Steps

1. Prepare the environment:
   • Place the inventory.yml and install_hpe_ezmeral.yml files in the same directory.
2. Run the playbook:

ansible-playbook -i inventory.yml install_hpe_ezmeral.yml

3. Verify the installation:
   • Access the HPE Ezmeral Data Fabric WebUI:

http://<CLDB-node-IP&gt;:8443

3. Run test commands to ensure the cluster is operational:

hadoop fs -mkdir /test

hadoop fs -ls /

---

This playbook sets up the cluster for basic functionality. You can expand it to include advanced configurations such as Kerberos integration, SSL/TLS setup, or custom disk partitioning.