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Upgrading Unravel from version 4.6.1.9 to 4.7.x.x
  1. Navigate to the ansible-installation directory and create a copy of the vars_template.yml file.

    cp vars_template.yml vars.yml
  2. Edit vars.yml by using any editor. For example, the vi editor.

    vi vars.yml
  3. In the vars.yml file, update values for the following parameters:

    Variable

    Description

    unravel_tar_url

    Specify the URL of the Unravel distribution.

    unravel_user

    Specify the username of the Linux user who owns Unravel.

    unravel_group

    Specify the names of the user groups to which the Linux user belongs.

    unravel_root_path

    Specify the path where Unravel is installed.

    unravel_version

    Specify the Unravel version to which you want to upgrade.

    skip_precheck

    Specify whether you want to skip the upgrade.

    skip_download_untar

    • Y: If you set this variable to Y, it skips the step to download and extract the Unravel tarball and configures or sets up Unravel.

    • N: If you set this variable to N, it downloads and extracts the Unravel installation tarball.

    data_dir:

    Specify if you want to configure a separate data directory outside the Unravel directory.

    cloud_platform

    Specify the corresponding cloud platform. It can be one of the following: Databricks, Amazon EMR, or Dataproc.

  4. Navigate to the ansible-installation > group_vars directory.

  5. In the all > all file, change the value of async_time to 25200 (7 hours) and async_poll to 300 (5 minutes) if the Elasticsearch data is large (more than 20GB).

    Note

    To check the current size of the Elasticsearch data, run the following command:

    du -hs <unravel_data_dir>/elasticsearch_1
  6. In the cloud_node > cloud_node.yml file, specify the hosts file (if the Unravel upgrade is for a cloud platform).

  7. In the core_node > core_node.yml and edge_nodes > edge_nodes.yml files, set the corresponding hosts file (if the Unravel upgrade is for an on-premise platform).

  8. Back up the data directory.

    tar czf /tmp/unravel-data.tar.gz /srv/unravel
  9. If you are using an external database, create a copy of the database. For example, if you are using MySQL1 database, run the following command:

    mysqldump -u <username> –p <password> <database_name> > [dump_file.sql]
  10. From the Unravel server, run the Ansible playbook.

    ansible-playbook -i inventories 4619_upgrade.yml -e @vars.yml -vvv

    Unravel is upgraded to the specified version.

  11. Start Unravel services on all hosts.

    ansible-playbook -i inventories/ install_unravel.yml -vvv -e @vars.yml --tags start_unravel
  12. Check the status of Unravel services on all hosts.

    ansible-playbook -i inventories/ install_unravel.yml -vvv -e @vars.yml --tags status_unravel