Amazon FSx for Lustre CSI driver

The FSx for Lustre Container Storage Interface (CSI) driver provides a CSI interface that allows Amazon EKS clusters to manage the lifecycle of FSx for Lustre file systems.

This topic shows you how to deploy the FSx for Lustre CSI Driver to your Amazon EKS cluster and verify that it works. We recommend using version 0.4.0 of the driver.

Note

This driver is supported on Kubernetes version 1.21 and later Amazon EKS clusters and nodes. The driver is not supported on Fargate or Arm nodes. Alpha features of the FSx for Lustre CSI Driver are not supported on Amazon EKS clusters. The driver is in Beta release. It is well tested and supported by Amazon EKS for production use. Support for the driver will not be dropped, though details may change. If the schema or schematics of the driver changes, instructions for migrating to the next version will be provided.

For detailed descriptions of the available parameters and complete examples that demonstrate the driver's features, see the FSx for Lustre Container Storage Interface (CSI) driver project on GitHub.

Prerequisites

You must have:

Version 1.20.40 or later of the AWS CLI installed. You can check your currently-installed version with the aws --version command. To install or upgrade the AWS CLI, see Installing the AWS CLI.
An existing Amazon EKS cluster. If you don't currently have a cluster, see Getting started with Amazon EKS to create one.
An existing IAM OpenID Connect (OIDC) provider for your cluster. To determine whether you already have one, or to create one, see Create an IAM OIDC provider for your cluster.
Version 0.67.0 or later of eksctl installed. You can check your currently-installed version with the eksctl version command. To install or upgrade eksctl, see Installing or upgrading eksctl.
The latest version of kubectl installed that aligns to your cluster version. You can check your currently-installed version with the kubectl version --short --client command. For more information, see Installing kubectl.

To deploy the FSx for Lustre CSI driver to an Amazon EKS cluster

Create an IAM policy and service account that allows the driver to make calls to AWS APIs on your behalf.

Copy the following text and save it to a file named fsx-csi-driver.json.


{

   "Version":"2012-10-17",
   "Statement":[
      {
         "Effect":"Allow",
         "Action":[
            "iam:CreateServiceLinkedRole",
            "iam:AttachRolePolicy",
            "iam:PutRolePolicy"
         ],
         "Resource":"arn:aws:iam::*:role/aws-service-role/s3.data-source.lustre.fsx.amazonaws.com/*"
      },
      {
         "Action":"iam:CreateServiceLinkedRole",
         "Effect":"Allow",
         "Resource":"*",
         "Condition":{
            "StringLike":{
               "iam:AWSServiceName":[
                  "fsx.amazonaws.com"
               ]
            }
         }
      },
      {
         "Effect":"Allow",
         "Action":[
            "s3:ListBucket",
            "fsx:CreateFileSystem",
            "fsx:DeleteFileSystem",
            "fsx:DescribeFileSystems"
         ],
         "Resource":[
            "*"
         ]
      }
   ]
}

Create the policy. You can replace <Amazon_FSx_Lustre_CSI_Driver> with a different name.
```
aws iam create-policy \
    --policy-name <Amazon_FSx_Lustre_CSI_Driver> \
    --policy-document file://fsx-csi-driver.json
```
Take note of the policy Amazon Resource Name (ARN) that is returned.

Create a Kubernetes service account for the driver and attach the policy to the service account. Replacing the ARN of the policy with the ARN returned in the previous step.
```
eksctl create iamserviceaccount \
    --region <region-code> \
    --name fsx-csi-controller-sa \
    --namespace kube-system \
    --cluster <prod> \
    --attach-policy-arn arn:aws:iam::<111122223333:policy/Amazon_FSx_Lustre_CSI_Driver> \
    --approve
```
Output:

You'll see several lines of output as the service account is created. The last line of output is similar to the following example line.
```
[ℹ]  created serviceaccount "kube-system/fsx-csi-controller-sa"
```
Note the name of the AWS CloudFormation stack that was deployed. In the example output above, the stack is named eksctl-prod-addon-iamserviceaccount-kube-system-fsx-csi-controller-sa.
Note the Role ARN for the role that was created.
1. Open the AWS CloudFormation console at https://console.aws.amazon.com/cloudformation.
2. Ensure that the console is set to the Region that you created your IAM role in and then select Stacks.
3. Select the stack named eksctl-prod-addon-iamserviceaccount-kube-system-fsx-csi-controller-sa.
4. Select the Outputs tab. The Role ARN is listed on the Output(1) page.

Deploy the driver with the following command.

Note

To see or download the yaml file manually, you can find it on the aws-fsx-csi-driver Github.


kubectl apply -k "github.com/kubernetes-sigs/aws-fsx-csi-driver/deploy/kubernetes/overlays/stable/?ref=master"

Output


Warning: kubectl apply should be used on resource created by either kubectl create --save-config or kubectl apply
serviceaccount/fsx-csi-controller-sa configured
clusterrole.rbac.authorization.k8s.io/fsx-csi-external-provisioner-role created
clusterrolebinding.rbac.authorization.k8s.io/fsx-csi-external-provisioner-binding created
deployment.apps/fsx-csi-controller created
daemonset.apps/fsx-csi-node created
csidriver.storage.k8s.io/fsx.csi.aws.com created

Patch the driver deployment to add the service account that you created in step 3, replacing the ARN with the ARN that you noted in step 4.


kubectl annotate serviceaccount -n kube-system <fsx-csi-controller-sa> \
 eks.amazonaws.com/role-arn=<arn:aws:iam::111122223333:role/eksctl-prod-addon-iamserviceaccount-kube-sys-Role1-NPFTLHJ5PJF5> --overwrite=true

To deploy a Kubernetes storage class, persistent volume claim, and sample application to verify that the CSI driver is working

This procedure uses the Dynamic volume provisioning for Amazon S3 from the FSx for Lustre Container Storage Interface (CSI) driver GitHub repository to consume a dynamically-provisioned FSx for Lustre volume.

Create an Amazon S3 bucket and a folder within it named export by creating and copying a file to the bucket.
```
aws s3 mb s3://<fsx-csi>
echo test-file >> testfile
aws s3 cp testfile s3://<fsx-csi>/export/testfile
```

Download the storageclass manifest with the following command.


curl -o storageclass.yaml https://raw.githubusercontent.com/kubernetes-sigs/aws-fsx-csi-driver/master/examples/kubernetes/dynamic_provisioning_s3/specs/storageclass.yaml

Edit the file and replace the existing, <example values> with your own.
```
parameters:
  subnetId: <subnet-056da83524edbe641>
  securityGroupIds: <sg-086f61ea73388fb6b>
  s3ImportPath: s3://<ml-training-data-000>
  s3ExportPath: s3://<ml-training-data-000/export>
  deploymentType: <SCRATCH_2>
```
- subnetId – The subnet ID that the Amazon FSx for Lustre file system should be created in. Amazon FSx for Lustre is not supported in all Availability Zones. Open the Amazon FSx for Lustre console at https://console.aws.amazon.com/fsx/ to confirm that the subnet that you want to use is in a supported Availability Zone. The subnet can include your nodes, or can be a different subnet or VPC. If the subnet that you specify is not the same subnet that you have nodes in, then your VPCs must be connected, and you must ensure that you have the necessary ports open in your security groups.
- securityGroupIds – The security group ID for your nodes.
- s3ImportPath – The Amazon Simple Storage Service data repository that you want to copy data from to the persistent volume. Specify the fsx-csi bucket that you created in step 1.
- s3ExportPath – The Amazon S3 data repository that you want to export new or modified files to. Specify the fsx-csi/export folder that you created in step 1.
- deploymentType – The file system deployment type. Valid values are SCRATCH_1, SCRATCH_2, and PERSISTENT_1. For more information about deployment types, see Create your Amazon FSx for Lustre file system.
Note

The Amazon S3 bucket for s3ImportPath and s3ExportPath must be the same, otherwise the driver cannot create the FSx for Lustre file system. The s3ImportPath can stand alone. A random path will be created automatically like s3://ml-training-data-000/FSxLustre20190308T012310Z. The s3ExportPath cannot be used without specifying a value for S3ImportPath.
Create the storageclass.
```
kubectl apply -f storageclass.yaml
```

Download the persistent volume claim manifest.


curl -o claim.yaml https://raw.githubusercontent.com/kubernetes-sigs/aws-fsx-csi-driver/master/examples/kubernetes/dynamic_provisioning_s3/specs/claim.yaml

(Optional) Edit the claim.yaml file. Change <1200Gi> to one of the increment values listed below, based on your storage requirements and the deploymentType that you selected in a previous step.
```
storage: <1200Gi>
```
- SCRATCH_2 and PERSISTENT – 1.2 TiB, 2.4 TiB, or increments of 2.4 TiB over 2.4 TiB.
- SCRATCH_1 – 1.2 TiB, 2.4 TiB, 3.6 TiB, or increments of 3.6 TiB over 3.6 TiB.
Create the persistent volume claim.
```
kubectl apply -f claim.yaml
```
Confirm that the file system is provisioned.
```
kubectl get pvc
```
Output.
```
NAME        STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGE
fsx-claim   Bound    pvc-15dad3c1-2365-11ea-a836-02468c18769e   1200Gi     RWX            fsx-sc         7m37s
```
Note

The STATUS may show as Pending for 5-10 minutes, before changing to Bound. Don't continue with the next step until the STATUS is Bound.

Deploy the sample application.


kubectl apply -f https://raw.githubusercontent.com/kubernetes-sigs/aws-fsx-csi-driver/master/examples/kubernetes/dynamic_provisioning_s3/specs/pod.yaml

Verify that the sample application is running.


kubectl get pods

Output


NAME      READY   STATUS              RESTARTS   AGE
fsx-app   1/1     Running             0          8s

Access Amazon S3 files from the FSx for Lustre file system

If you only want to import data and read it without any modification and creation, then you don't need a value for s3ExportPath in your storageclass.yaml file. Verify that data was written to the FSx for Lustre file system by the sample app.


kubectl exec -it fsx-app ls /data

Output.


export  out.txt

The sample app wrote the out.txt file to the file system.

Archive files to the s3ExportPath

For new files and modified files, you can use the Lustre user space tool to archive the data back to Amazon S3 using the value that you specified for s3ExportPath.

Export the file back to Amazon S3.
```
kubectl exec -ti fsx-app -- lfs hsm_archive /data/out.txt
```
Note
- New files aren't synced back to Amazon S3 automatically. In order to sync files to the s3ExportPath, you need to install the Lustre client in your container image and manually run the lfs hsm_archive command. The container should run in privileged mode with the CAP_SYS_ADMIN capability.
- This example uses a lifecycle hook to install the Lustre client for demonstration purpose. A normal approach is building a container image with the Lustre client.

Confirm that the out.txt file was written to the s3ExportPath folder in Amazon S3.


aws s3 ls fsx-csi/export/

Output


2019-12-23 12:11:35       4553 out.txt
2019-12-23 11:41:21         10 testfile

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Amazon EFS CSI driver

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