Upgrading DataStax Enterprise 4.5-5.1 using the DataStax installer

DataStax Enterprise upgrade instructions for the DataStax Installer.

cassandra.yaml

The location of the cassandra.yaml file depends on the type of installation:

Package installations
                  Installer-Services installations (DSE 4.5 to 5.1)

 /etc/cassandra/cassandra.yaml

Tarball installations
                  Installer-No Services installations (DSE 4.5 to 5.1)

 install_location/conf/cassandra.yaml

Default DataStax Enterprise installer backup locations (DSE 4.5 to 5.1)

The backup directory name is based on date and time. For example: 20170212_221550
Installer-Services /usr/share/dse/backups/backup_file_dir
Installer-No Services install_location/backups/backup_file_dir

dse.yaml

The location of the dse.yaml file depends on the type of installation:
Package installations /etc/dse/dse.yaml
Tarball installations installation_location/resources/dse/conf/dse.yaml
These steps show how to upgrade to versions of DataStax Enterprise (DSE) up to 5.1 using the GUI installer.
Note: The DataStax installer has been removed in DSE 6.0 and later.
The DataStax installer upgrades DataStax Enterprise and automatically performs many upgrade tasks:
  • Drains the currently running node.
  • Preserves the configuration files and places them in a backup directory.
  • Removes previously installed packages.
  • Updates the cassandra.yaml and dse.yaml configuration files with new entries.

Prerequisites

To upgrade to the latest version of DataStax Enterprise using the DataStax Installer, ensure the following requirements are met:

  • DataStax Enterprise 4.5 or 4.6 for upgrading to 4.8
  • DataStax Enterprise 4.7 or 4.8 for upgrading to 5.0
  • DataStax Enterprise 5.0 for upgrading to 5.1
Attention: Read and understand these instructions before upgrading. Carefully reviewing the planning and upgrading instructions can prevent errors and data loss.

Upgrading Linux installations using the DataStax installer

  1. Familiarize yourself with the changes and features in the release:
    • DataStax Enterprise release notes for 5.1, 5.0, and 4.8.
    • General upgrade advice and Cassandra features in NEWS.txt. If you are upgrading from an earlier version, read NEWS.txt all the way back to your current version.
    • Cassandra changes in CHANGES.txt.
  2. Verify your current product version. If necessary, upgrade to an interim version.
    Current version Upgrade version
    DataStax Enterprise 5.0 DataStax Enterprise 5.1
    DataStax Enterprise 4.7 or 4.8 DataStax Enterprise 5.0
    DataStax Enterprise 4.0, 4.5, or 4.6 DataStax Enterprise 4.8
    DataStax Community or open source Apache Cassandra™ 2.0.x DataStax Enterprise 4.8
    DataStax Community 3.0.x DataStax Enterprise 5.1
    DataStax Distribution of Apache Cassandra™ 3.x DataStax Enterprise 5.0
  3. Verify the Java runtime version and upgrade to the recommended version.
    java -version
    DataStax Enterprise 4.7 or 4.8
    The latest version of Oracle Java SE Runtime Environment 7 or 8 or OpenJDK 7 is recommended. The JDK is recommended for development and production systems. The JDK provides useful troubleshooting tools that are not in the JRE, such as jstack, jmap, jps, and jstat.
    Note: If using Oracle Java 7, you must use at least 1.7.0_25. If using Oracle Java 8, you must use at least 1.8.0_40.
    DataStax Enterprise 5.0 and later

    The JDK is recommended for development and production systems, and provides useful troubleshooting tools that are not in the JRE, such as jstack, jmap, jps, and jstat.

  4. Download the installer for your computer from the DataStax downloads page or use the following command: 
    curl --user dsa_email_address:password -O https://downloads.datastax.com/enterprise/DataStaxEnterprise-5.1.x-linux-x64-installer.run
    For example, alice can run this command to download DSE 5.1.0:
    curl --user alice@email.com:password -O https://downloads.datastax.com/enterprise/DataStaxEnterprise-5.1.0-linux-x64-installer.run
  5. From the directory where you downloaded the install file, make it executable and run it using the sudo command.
    $ chmod +x DataStaxEnterprise-version_number-linux-x64-installer.run ## Changes permission to executable
$ sudo ./DataStaxEnterprise-version_number-linux-x64-installer.run
  6. Follow the instructions in the setup wizard. For a detailed description of the settings in the wizard, see the installation instructions in 5.1, 5.0, or 4.8.
  7. When upgrading DSE to versions earlier than 5.1.16, 6.0.8, or 6.7.4 inclusive, if any tables are using DSE Tiered Storage, remove all txn_compaction log files from second-level tiers and lower. For example, given the following dse.yaml configuration, remove txn_compaction log files from /mnt2 and /mnt3 directories:
    tiered_storage_options:
    strategy1:
        tiers:
            - paths:
                - /mnt1
            - paths:
                - /mnt2
            - paths:
                - /mnt3

    The following example removes the files using the find command: 

    find /mnt2 -name "*_txn_compaction_*.log" -type f -delete &&
find /mnt3 -name "*_txn_compaction_*.log" -type f -delete
    Warning: Failure to complete this step may result in data loss.
  8. Start DataStax Enterprise:
    sudo service dse start ## Starts the DataStax Enterprise server
  9. (DataStax Enterprise 4.7 and 4.8 only) Start the DataStax Agent: 
    sudo service datastax-agent start
    Note: For DataStax Enterprise 5.0, see the OpsCenter 6.0 documentation. For DataStax Enterprise 5.1, see the OpsCenter 6.1 documentation.
  10. Verify that DataStax Enterprise is running:
    nodetool status