Chapter 2. Major changes in version 1.8

Changed behavior

• Red Hat Hyperconverged Infrastructure for Virtualization 1.8 and Red Hat Virtualization 4.4 are based on Red Hat Enterprise Linux 8. Read about the key differences in Red Hat Enterprise Linux 8 in Considerations in adopting RHEL 8.
• Cluster upgrades now require at least 10 percent free space on gluster disks in order to reduce the risk of running out of space mid-upgrade. This is available post the upgrade to Red Hat Hyperconverged Infrastructure for Virtualization 1.8. (BZ#1783750)
• “Hosts” and “Additional Hosts” tabs in the Web Console have been combined into a new "Hosts" tab that shows information previously shown on both. (BZ#1762804)
• Readcache and readcachesize options have been removed from VDO volumes, as they are not supported on Red Hat Enterprise Linux 8 based operating systems. (BZ#1808081)
• The Quartz scheduler is replaced with the standard Java scheduler to match support with Red Hat Virtualization. (BZ#1797487)

Enhancements

• The Administrator Portal can now upgrade all hosts in a cluster with one click. This is available post the upgrade to Red Hat Hyperconverged Infrastructure for Virtualization 1.8. (BZ#1721366)
• At-rest encryption using Network-Bound Disk Encryption (NBDE) is now supported on new Red Hat Hyperconverged Infrastructure for Virtualization deployments. (BZ#1821248, BZ#1781184)
• Added support for IPv6 networking. Environments with both IPv4 and IPv6 addresses are not supported. (BZ#1721383)

• New roles, playbooks, and inventory examples are available to simplify and automate the following tasks:

  • Upgrading (BZ#1500728, BZ#1832654)
  • Backing up and restoring configuration (BZ#1850488)
  • Replacing hosts (BZ#1840123)
  • Blacklisting multipath devices (BZ#1807808)
  • Creating the gluster logical network (BZ#1832966)
  • Deploying on IPv6 networks. (BZ#1688217)
• Added an option to select IPv4 or IPv6 based deployment in the web console. (BZ#1688798)
• fsync in the replication module now uses eager-lock functionality which improves the performance of small-block of size approximately equal to 4k write-heavy workloads by more than 50 percent on Red Hat Hyperconverged Infrastructure for Virtualization 1.8. (BZ#1836164)
• The web console now supports blacklisting multipath devices. (BZ#1814120)
• New fencing policies skip_fencing_if_gluster_bricks_up and skip_fencing_if_gluster_quorum_not_met are now added and enabled by default. (BZ#1775552)
• Red Hat Hyperconverged Infrastructure for Virtualization now ensures that the "performance.strict-o-direct" option in Red Hat Gluster Storage is enabled before creating a storage domain. (BZ#1807400)
• Red Hat Gluster Storage volume options can now be set for all volumes in the Administrator Portal by using "all" as the volume name. (BZ#1775586)
• Read-only fields are no longer included in the web console user interface, making the interface simpler and easier to read. (BZ#1814553)