About this guide #

To receive support, you need an appropriate subscription with SUSE. To view the specific support offerings available to you, go to https://www.suse.com/support/ and select your product.

The support levels are defined as follows:

For contracted customers and partners, SUSE Enterprise Storage is delivered with L3 support for all packages, except for the following:

SUSE will only support the usage of original packages. That is, packages that are unchanged and not recompiled.

Technology previews are packages, stacks, or features delivered by SUSE to provide glimpses into upcoming innovations. Technology previews are included for your convenience to give you a chance to test new technologies within your environment. We would appreciate your feedback! If you test a technology preview, please contact your SUSE representative and let them know about your experience and use cases. Your input is helpful for future development.

Technology previews have the following limitations:

For an overview of technology previews shipped with your product, see the release notes at https://www.suse.com/releasenotes/x86_64/SUSE-Enterprise-Storage/7.

These commands help you to deploy Ceph cluster nodes, run commands on several (or all) cluster nodes at the same time, or assist you when adding or removing cluster nodes. The most frequently used commands are ceph-salt and ceph-salt config. You need to run Salt commands on the Salt Master node as root. These commands are introduced with the following prompt:

root@master # 

For example:

root@master # ceph-salt config ls

These are lower-level commands to configure and fine tune all aspects of the cluster and its gateways on the command line, for example ceph, cephadm, rbd, or radosgw-admin.

To run Ceph related commands, you need to have read access to a Ceph key. The key's capabilities then define your privileges within the Ceph environment. One option is to run Ceph commands as root (or via sudo) and use the unrestricted default keyring 'ceph.client.admin.key'.

The safer and recommended option is to create a more restrictive individual key for each administrator user and put it in a directory where the users can read it, for example:

~/.ceph/ceph.client.USERNAME.keyring

Tip: Path to Ceph keys

To use a custom admin user and keyring, you need to specify the user name and path to the key each time you run the ceph command using the -n client.USER_NAME and --keyring PATH/TO/KEYRING options.

To avoid this, include these options in the CEPH_ARGS variable in the individual users' ~/.bashrc files.

Although you can run Ceph-related commands on any cluster node, we recommend running them on the Admin Node. This documentation uses the cephuser user to run the commands, therefore they are introduced with the following prompt:

cephuser@adm > 

For example:

cephuser@adm > ceph auth list

Tip: Commands for specific nodes

If the documentation instructs you to run a command on a cluster node with a specific role, it will be addressed by the prompt. For example:

cephuser@mon > 

cephuser@adm > cephadm ceph-volume simple scan

Linux commands not related to Ceph, such as mount, cat, or openssl, are introduced either with the cephuser@adm > or # prompts, depending on which privileges the related command requires.

For more information on Ceph key management, refer to Section 30.2, “Key management”.