Chapter 3. Major Updates

Scrub processes can now be disabled during recovery

A new option osd_scrub_during_recovery has been added with this release. Setting this option to false in the Ceph configuration file disables starting new scrub processes during recovery. As a result, the speed of the recovery is enhanced.

The radosgw-admin utility supports a new bucket limitcheck command

The radosgw-admin utility has a new command bucket limitcheck to warn the administrator when a bucket needs resharding. Previously, buckets with more objects than is recommended could be unnoticed and cause performance issues. This new command reports on bucket status with respect to the configured bucket sharding recommendations ensuring that administrators can detect overloaded buckets easily.

Red Hat Ceph Storage now ships with a companion ISO that contains the debuginfo packages

Previously, it was difficult for users to consume the debuginfo packages in restricted environments where the Red Hat CDN was not directly accessible. Red Hat Ceph Storage now ships with a companion ISO for Red Hat Enterprise Linux that contains the debuginfo packages for the product. User can now use this ISO to obtain the debuginfo packages.

The process of enabling SELinux on a Ceph Storage Cluster has been improved

A new subcommand has been added to the ceph-disk utility that can help make the process of enabling SELinux on a Ceph Storage Cluster faster. Previously, the standard way of SELinux labeling did not take into account the fact that OSDs usually reside on different disks. This caused the labelling process to be slow. This new subcommand is designed to speed up the process by labeling the Ceph files in parallel per OSD.

Subscription Manager now reports on the raw disk capacity available per OSD

With this release, Red Hat Subscription Manager can report on the raw disk capacity available per OSD. To do so:

The Ceph Object Gateway data logs are trimmed automatically

Previously, after data logs in the Ceph Object Gateway were processed by data syncs and were no longer needed, they remained in the Ceph Object Gateway host taking up space. Ceph now automatically removes these logs.

Improved error messaging in the Ceph Object Gateway

Previously, when an invalid placement group configuration prevented the Ceph Object Gateway from creating any of its internal pools, the error message was insufficient, making it difficult to deduce the root cause of failure.

Use CEPH_ARGS to ensure all commands work for clusters with unique names

In Red Hat Ceph Storage, the cluster variable in group_vars/all determines the name of the cluster. Changing the default value to something else means that all the command line calls need to be changed as well. For example, if the cluster name is foo, then ceph health becomes ceph --cluster foo health.

Improvements to the snapshot trimmer

This release improves control and throttling of the snapshot trimmer in the underlying Reliable Autonomic Distributed Object Store (RADOS).

The new version of the Ceph container is fully supported

The new version of the Ceph container image is based on the Red Hat Ceph Storage 2.3 and Red Hat Enterprise Linux 7.3. This version is now fully supported.

Exporting namespaces to NFS-Ganesha

NFS-Ganesha is an NFS interface for the Ceph Object Gateway that presents buckets and objects as directories and files. With this update, NFS-Ganesha fully supports the ability to export Amazon S3 object namespaces by using NFS 4.1.

The Troubleshooting Guide is available

With this release, the Troubleshooting Guide is available. The guide contains information about fixing the most common errors you can encounter with the Ceph Storage Cluster.