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Data Hub rolling upgrades

The Data Hub rolling upgrade allows you to upgrade the Data Hub without stopping the Data Hub itself and incurring workload downtime.

Data Hub rolling upgrades are only available for the following cluster types:

  • Cloudera Operational Database
  • Cloudera Streams Messaging

Cloudera Operational Database clusters

For an Operational Database cluster to be eligible for rolling upgrade, the following requirements must be met:

  • Currently, rolling OS upgrade is only supported on COD clusters with storage selected as HDFS or cloud without ephemeral storage.
  • Rolling OS upgrade is not supported on Micro COD clusters.
Table 1.
Current Runtime version & template Rolling upgrade support for Runtime? Rolling OS upgrade support?
7.2.18 Yes, to 7.2.18+ (including service pack upgrades to 7.2.18.100 and higher versions) Yes
7.2.17.x Yes, to 7.2.18+ Yes

For instructions on performing COD rolling upgrades, see Performing a Cloudera Runtime upgrade (COD) and Performing a Cloudera operating system upgrade (COD).

Cloudera Streams Messaging clusters

For a Streams Messaging cluster to be eligible for rolling upgrade, the following requirements must be met:

  • The cluster OS must be RHEL 8. Streams Messaging clusters on CentOS are not supported.
  • The cluster must be Runtime version 7.2.18 or higher version.
  • The cluster template must be Streams Messaging High Availability.
Current Runtime version & template Rolling upgrade support for Runtime? Rolling OS upgrade support?
7.2.18 Streams Messaging High Availability template

(Clusters created on 7.2.18 only)

 Yes, to 7.2.18+ (including service pack upgrades to 7.2.18.100 and higher versions) Yes, for up to 20 nodes.

In some circumstances, a rolling upgrade may not be supported for a Streams Messaging cluster, but can be enabled through entitlement. The Data Hub upgrade UI displays information about whether a rolling upgrade is available, unavailable, or may be available under entitlement. For instructions on performing a Data Hub upgrade, including rolling upgrades, see Upgrading Data Hubs. For information about obtaining an entitlement for rolling upgrade, contact Cloudera Customer Support.