Support EFS CSI by changing volume claim

[cep21]

Hi,

EFS is great for atlantis since it's not locked to a single AZ. The future of EFS kubernetes is https://github.com/kubernetes-sigs/aws-efs-csi-driver. There's no way (I know of) to use volumeclaimtemplates (which this helm chart uses) with the CSI spec. There are details here: https://github.com/kubernetes-sigs/aws-efs-csi-driver/issues/42

Rather than a storageclass inside the volumeclaimtemplates, can we use our own PersistentVolume (where we can configure a volumeHandle) ?

[nilsSure]

+1

[nitrocode]

Looks like you can provide your own StorageClass using name efs-atlantis

kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: efs-atlantis
provisioner: efs.csi.aws.com
parameters:
  provisioningMode: efs-ap
  fileSystemId: <EFS ID>
  directoryPerms: "777"

Then set the volume claim to the new storage class

# values.yaml
volumeClaim:
  storageClassName: efs-atlantis

https://github.com/runatlantis/helm-charts/blob/bc9db325f8f023a282fabe03de6a5fb9b969ac7a/charts/atlantis/templates/statefulset.yaml#L540-L542

https://github.com/kubernetes-sigs/aws-efs-csi-driver/issues/541#issuecomment-1027226852

[GenPage]

@cep21 can you confirm if @nitrocode suggestion addresses your issue?

[davirodriguesrezende]

@nitrocode I tested it and it didn't work for me, can you tell me what else you did?

[Gabryel8818]

hello everything is fine?

sorry for the intrusion, but I have noticed that the atlantis replicas do not use the same access point when using the aws-efs-csi plugin

Is it possible that atlantis replicas use the same access point?

i tested it and i didn't work for me @nitrocode

[pof-jhansilva]

Trying to revive this; I'm trying to use EFS with Atlantis and I'm having a hard time while using this Helm Chart.

[Balsir]

Setting up EFS with the chart is doable on both EC2 and Fargate.

1. Install and configure aws-efs-csi-driver
2. Create a StorageClass, PersistentVolumeClaim, and in case of Fargate PersistentVolume outside the chart, because Fargate doesn't support dynamically provisioned PersistentVolume
3. Set .Values.volumeClaim.enabled to false
4. Mount the new volume via .Values.extraVolumes and .Values.extraVolumeMounts

StatefulSet creates a new PersistentVolumeClaim for each replica, so if you want a common filesystem for all your pods, you need to create the PVC separately https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/#stable-storage

Example from efs-csi docs: https://github.com/kubernetes-sigs/aws-efs-csi-driver/blob/master/examples/kubernetes/statefulset/specs/example.yaml

[GMartinez-Sisti]

Looks like this is not an issue anymore? Please let us know.

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