Requirements¶
Supported frontends (orchestrators)¶
Trident supports multiple container engines and orchestrators, including:
- NetApp Kubernetes Service
- Kubernetes 1.9 or later (latest: 1.15)
- OpenShift 3.9 or later (latest: 3.11)
- Docker 17.06 (CE or EE) or later (latest: 18.09)
- Docker Enterprise Edition 17.06 or later (latest: 2.1)
In addition, Trident should work with any distribution of Docker or Kubernetes that uses one of the supported versions as a base, such as Rancher or Tectonic.
Supported backends (storage)¶
To use Trident, you need one or more of the following supported backends:
- FAS/AFF/Select/Cloud ONTAP 8.3 or later
- HCI/SolidFire Element OS 8 or later
- E/EF-Series SANtricity
- Azure NetApp Files
- Cloud Volumes Service for AWS
Feature Gates¶
Trident requires some feature gates to be enabled for it to work. These feature gates are detailed below:
| Feature Gate | Default | Stage | Since | Until |
|---|---|---|---|---|
| CSIDriverRegistry | False | Alpha | 1.12 | 1.13 |
| CSIDriverRegistry | True | Beta | 1.14 | |
| CSINodeInfo | False | Alpha | 1.12 | 1.13 |
| CSINodeInfo | True | Beta | 1.14 | |
| VolumeSnapshotDataSource | False | Alpha | 1.12 |
If using Kubernetes 1.13:
- Enable the
CSIDriverRegistry,CSINodeInfoandVolumeSnapshotDataSourceflags.
If using Kubernetes 1.14 and above:
- Enable the
VolumeSnapshotDataSourceflag. The other flags are enabled by default.
Supported host operating systems¶
By default Trident itself runs in a container, therefore it will run on any Linux worker.
However, those workers do need to be able to mount the volumes that Trident provides using the standard NFS client or iSCSI initiator, depending on the backend(s) you’re using.
These are the Linux distributions that are known to work:
- Debian 8 or later
- Ubuntu 16.04 or later
- CentOS 7.0 or later
- RHEL 7.0 or later
- CoreOS 1353.8.0 or later
The tridentctl utility also runs on any of these distributions of Linux.
Host configuration¶
Depending on the backend(s) in use, NFS and/or iSCSI utilities must be installed on all of the workers in the cluster. See the worker preparation guide for details.
Storage system configuration¶
Trident may require some changes to a storage system before a backend configuration can use it. See the backend configuration guide for details.