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Astra Trident
21.07

Configure a CVS for AWS backend

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Learn about how to configure NetApp Cloud Volumes Service (CVS) for AWS as the backend for your Astra Trident installation using the sample configurations provided.

Note Cloud Volumes Service for AWS does not support volumes less than 100 GB. Trident automatically creates 100-GB volumes if a smaller volume is requested.
What you'll need

To configure and use the Cloud Volumes Service for AWS backend, you need the following:

  • An AWS account configured with NetApp CVS

  • API region, URL, and keys for your CVS account

Backend configuration options

See the following table for the backend configuration options:

Parameter Description Default

version

Always 1

storageDriverName

Name of the storage driver

"aws-cvs"

backendName

Custom name or the storage backend

Driver name + "_" + part of API key

apiRegion

CVS account region. You can find the value in the CVS web portal in Account settings/API access.

apiURL

CVS account API URL. You can find the value in the CVS web portal in Account settings/API access.

apiKey

CVS account API key. You can find the value in the CVS web portal in Account settings/API access.

secretKey

CVS account secret key. You can find the value in the CVS web portal in Account settings/API access.

proxyURL

Proxy URL if proxy server required to connect to CVS Account. The proxy server can either be an HTTP proxy or an HTTPS proxy. For an HTTPS proxy, certificate validation is skipped to allow the usage of self-signed certificates in the proxy server. Proxy servers with authentication enabled are not supported.

nfsMountOptions

Fine-grained control of NFS mount options.

"nfsvers=3"

limitVolumeSize

Fail provisioning if the requested volume size is above this value

"" (not enforced by default)

serviceLevel

The CVS service level for new volumes. The values are "standard", "premium", and "extreme".

"standard"

debugTraceFlags

Debug flags to use when troubleshooting. Example, \{"api":false, "method":true}. Do not use this unless you are troubleshooting and require a detailed log dump.

null
Note apiURL is unique for each apiRegion. For example, the us-west-2 apiRegion has the https://cv.us-west-2.netapp.com:8080/v1/ apiURL. Similarly, the us-east-1 apiRegion has the https://cds-aws-bundles.netapp.com:8080/v1/ apiURL. Make sure to check the CVS Dashboard for the correct apiRegion and apiURL parameters for your backend configuration.

Each backend provisions volumes in a single AWS region. To create volumes in other regions, you can define additional backends.

You can control how each volume is provisioned by default by specifying the following options in a special section of the configuration file. See the configuration examples below.

Parameter Description Default

exportRule

The export rule(s) for new volumes

"0.0.0.0/0"

snapshotDir

Controls visbility of the .snapshot directory

"false"

snapshotReserve

Percentage of volume reserved for snapshots

"" (accept CVS default of 0)

size

The size of new volumes

"100G"

The exportRule value must be a comma-separated list of any combination of IPv4 addresses or IPv4 subnets in CIDR notation.

Note For all the volumes created on a CVS AWS backend, Astra Trident copies all the labels present on a storage pool to the storage volume at the time it is provisioned. Storage administrators can define labels per storage pool and group all the volumes created in a storage pool. This provides a convenient way of differentiating volumes based on a set of customizable labels that are provided in the backend configuration.

Example 1: Minimal configuration

This is the absolute minimum backend configuration.

This configuration is ideal when you are just getting started with CVS AWS and trying things out, but in practice you are going to want to provide additional scoping for the volumes you provision.

{
    "version": 1,
    "storageDriverName": "aws-cvs",
    "apiRegion": "us-east-1",
    "apiURL": "https://cds-aws-bundles.netapp.com:8080/v1",
    "apiKey": "znHczZsrrtHisIsAbOguSaPIKeyAZNchRAGzlzZE",
    "secretKey": "rR0rUmWXfNioN1KhtHisiSAnoTherboGuskey6pU"
}

Example 2: Single service level configuration

This example shows a backend file that applies the same aspects to all Astra Trident-created storage in the AWS us-east-1 region. This example also shows the usage of proxyURL in the backend file.

{
    "version": 1,
    "storageDriverName": "aws-cvs",
    "backendName": "cvs-aws-us-east",
    "apiRegion": "us-east-1",
    "apiURL": "https://cds-aws-bundles.netapp.com:8080/v1",
    "apiKey": "znHczZsrrtHisIsAbOguSaPIKeyAZNchRAGzlzZE",
    "secretKey": "rR0rUmWXfNioN1KhtHisiSAnoTherboGuskey6pU",
    "proxyURL": "http://proxy-server-hostname/",
    "nfsMountOptions": "vers=3,proto=tcp,timeo=600",
    "limitVolumeSize": "50Gi",
    "serviceLevel": "premium",
    "defaults": {
        "snapshotDir": "true",
        "snapshotReserve": "5",
        "exportRule": "10.0.0.0/24,10.0.1.0/24,10.0.2.100",
        "size": "200Gi"
    }
}

Example 3: Virtual storage pool configuration

This example shows the backend definition file configured with virtual storage pools along with StorageClasses that refer back to them.

In the sample backend definition file shown below, specific defaults are set for all storage pools, which set the snapshotReserve at 5% and the exportRule to 0.0.0.0/0. The virtual storage pools are defined in the storage section. In this example, each individual storage pool sets its own serviceLevel, and some pools overwrite the default values.

{
    "version": 1,
    "storageDriverName": "aws-cvs",
    "apiRegion": "us-east-1",
    "apiURL": "https://cds-aws-bundles.netapp.com:8080/v1",
    "apiKey": "EnterYourAPIKeyHere***********************",
    "secretKey": "EnterYourSecretKeyHere******************",
    "nfsMountOptions": "vers=3,proto=tcp,timeo=600",

    "defaults": {
        "snapshotReserve": "5",
        "exportRule": "0.0.0.0/0"
    },

    "labels": {
        "cloud": "aws"
    },
    "region": "us-east-1",

    "storage": [
        {
            "labels": {
                "performance": "extreme",
                "protection": "extra"
            },
            "serviceLevel": "extreme",
            "defaults": {
                "snapshotDir": "true",
                "snapshotReserve": "10",
                "exportRule": "10.0.0.0/24"
            }
        },
        {
            "labels": {
                "performance": "extreme",
                "protection": "standard"
            },
            "serviceLevel": "extreme"
        },
        {
            "labels": {
                "performance": "premium",
                "protection": "extra"
            },
            "serviceLevel": "premium",
            "defaults": {
                "snapshotDir": "true",
                "snapshotReserve": "10"
            }
        },

        {
            "labels": {
                "performance": "premium",
                "protection": "standard"
            },
            "serviceLevel": "premium"
        },

        {
            "labels": {
                "performance": "standard"
            },
            "serviceLevel": "standard"
        }
    ]
}

The following StorageClass definitions refer to the storage pools above. By using the parameters.selector field, you can specify for each StorageClass the virtual pool that is used to host a volume. The volume will have the aspects defined in the chosen pool.

The first StorageClass (cvs-extreme-extra-protection) maps to the first virtual storage pool. This is the only pool offering extreme performance with a snapshot reserve of 10%. The last StorageClass (cvs-extra-protection) calls out any storage pool which provides a snapshot reserve of 10%. Astra Trident decides which virtual storage pool is selected and ensures that the snapshot reserve requirement is met.

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: cvs-extreme-extra-protection
provisioner: netapp.io/trident
parameters:
  selector: "performance=extreme; protection=extra"
allowVolumeExpansion: true
---
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: cvs-extreme-standard-protection
provisioner: netapp.io/trident
parameters:
  selector: "performance=extreme; protection=standard"
allowVolumeExpansion: true
---
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: cvs-premium-extra-protection
provisioner: netapp.io/trident
parameters:
  selector: "performance=premium; protection=extra"
allowVolumeExpansion: true
---
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: cvs-premium
provisioner: netapp.io/trident
parameters:
  selector: "performance=premium; protection=standard"
allowVolumeExpansion: true
---
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: cvs-standard
provisioner: netapp.io/trident
parameters:
  selector: "performance=standard"
allowVolumeExpansion: true
---
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: cvs-extra-protection
provisioner: netapp.io/trident
parameters:
  selector: "protection=extra"
allowVolumeExpansion: true

What's next?

After you create the backend configuration file, run the following command:

tridentctl create backend -f <backend-file>

If the backend creation fails, something is wrong with the backend configuration. You can view the logs to determine the cause by running the following command:

tridentctl logs

After you identify and correct the problem with the configuration file, you can run the create command again.