Tarball Install and Upgrade

This topic describes how to install and upgrade Dremio using a Tarball package.

Installing Dremio

Perform these steps on each node of your Dremio cluster:

1. Create a dremio group.

    sudo groupadd -r dremio
   

2. Create a dremio user.

    sudo useradd -r -g dremio -d /var/lib/dremio -s /sbin/nologin dremio
   

3. Create Dremio directories.

    sudo mkdir /opt/dremio
    sudo mkdir /var/run/dremio && sudo chown dremio:dremio /var/run/dremio
    sudo mkdir /var/log/dremio && sudo chown dremio:dremio /var/log/dremio
    sudo mkdir /var/lib/dremio && sudo chown dremio:dremio /var/lib/dremio
   

4. Unpack Dremio into the /opt/dremio directory.

    sudo tar xvf dremio-<VERSION>.tar.gz -C /opt/dremio --strip-components=1
   

5. Create a symbolic link for the configuration folder.

    sudo ln -s /opt/dremio/conf /etc/dremio
   

6. (Optional) Set up your service configuration (SystemD setup).

   a. Copy the unit file for the dremio daemon from <DREMIO_HOME>/share/dremio.service to /etc/systemd/system/dremio.service.

    sudo cp <DREMIO_HOME>/share/dremio.service /etc/systemd/system/dremio.service
   

   b. Restart systemd.

    sudo systemctl daemon-reload
   

   c. (Optional) Enable dremio to start at boot.

    sudo systemctl enable dremio
   

7. Configure Dremio. See Dremio Configuration for more information.

Sample Service Configuration

The following snippet shows the configuration in the <DREMIO_HOME>/share/dremio.service file:

    #
    # Installation is assumed to be under /opt/dremio
    #
    [Unit]
    Description=Dremio Daemon Server
    Documentation=https://docs.dremio.com
    Wants=network-online.target
    After=network-online.target

    [Service]
    User=dremio
    Group=dremio
    RuntimeDirectory=dremio
    ExecStart=/opt/dremio/bin/dremio start-fg
    Restart=on-failure
    # Set maximum number of file descriptors Dremio can open.
    # Dremio requires a large number to work correctly.
    LimitNOFILE=65536


    [Install]
    WantedBy=multi-user.target

Upgrading Dremio

This topic provides upgrade instructions for Tarball-based installations.

Before you begin, do the following:

• While Dremio is still running, create a backup of your Dremio cluster.
• If HDFS/MapR-FS is configured, perform a snapshot of your distributed store directories.

To upgrade your Dremio installation:

1. Ensure that your existing Dremio cluster is backed up. See the Create a backup section.

2. Shut down all Dremio provisioned nodes. For example: <DREMIO-HOME>/bin/dremio stop

   • See the Shutting Down with YARN Deployments section.
   • See the Shutting Down with non-YARN Deployments section.
   • See the Shutdown Commands section.

3. On each Dremio node in your cluster, move your old Dremio installation to another location. For example:
   mv /opt/dremio /opt/dremio_bak

4. Download and install the new Dremio version.

   • For YARN deployments, install on each coordinator node in your Dremio cluster.

   • For non-YARN deployments, install on all nodes in your Dremio cluster.

     Perform the following steps on each Dremio node depending on your deployment (YARN vs non-YARN):

     [warning] Important
     Be sure the create the new directories with the same path as the original installation. In particular, the /data directory and associated data files must be in the same path as the original installation.

   • Create a new Dremio directory. For example:

      sudo mkdir /opt/dremio
     

   • Unpack Dremio into the /opt/dremio directory. For example:
     sudo tar xvf dremio-<version>.tar.gz -C /opt/dremio --strip-components=1
   • Create a symbolic link for the configuration folder. For example:
     sudo ln -s /opt/dremio/conf /etc/dremio

5. Copy the /conf directory and associated configuration files from your backup-copy location (from Step# 3) to the new installation location. As a result, the default files from the fresh install are overwritten. For example:
   cp /opt/dremio_bak/conf/* /opt/dremio/conf

   • For YARN deployments, perform this step on each coordinator node in your Dremio cluster.
   • For non-YARN deployments, perform this step on all nodes in your Dremio cluster.

6. On the coordinator node, copy the /data directory and associated data files from your backup-copy location (from Step# 3) to the new installation location. For example:
   cp -r /opt/dremio_bak/data /opt/dremio/data

   [warning] Important
   The new /data directory and files must be in the same directory path as the original installation. A different directory path results in the loss of all reflections because they are accessed by their full path.

   If your original data directory is in a location different from /opt/dremio/data, then this step can be skipped.

7. On the coordinator node, execute the upgrade script as the user running the Dremio Daemon service. For example, as "dremio":
   dremio-<version>/bin/dremio-admin upgrade

8. Start up all Dremio provisioned nodes in the Dremio cluster. For example: <DREMIO-HOME>/bin/dremio start.

   • See the Starting Up with YARN Deployments section.
   • See the Starting Up with non-YARN Deployments section.
   • See the Startup Commands section.

9. Backup your new Dremio cluster. See Create a backup for more information.