# Custom volumeMounts with Elastic Cloud on Kubernetes

**URL:** <https://discuss.elastic.co/t/custom-volumemounts-with-elastic-cloud-on-kubernetes/321128>\
**Category:** Elastic Cloud on Kubernetes (ECK)\
**Created:** [December 13, 2022, 1:36pm UTC](https://discuss.elastic.co/t/custom-volumemounts-with-elastic-cloud-on-kubernetes/321128 "2022-12-13T13:36:41Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![deepflyz](https://avatars.discourse-cdn.com/v4/letter/d/a6a055/32.png) [@deepflyz](https://discuss.elastic.co/u/deepflyz)\
**Post date:** [December 13, 2022, 1:36pm UTC](https://discuss.elastic.co/t/custom-volumemounts-with-elastic-cloud-on-kubernetes/321128/1 "2022-12-13T13:36:41Z")

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Hi,

I'm trying to install Elastic Cloud on Oracle OCI Kubernetes but I'm facing difficulties to use a custom volumeMounts.

Here is the yml file:

```auto
apiVersion: elasticsearch.k8s.elastic.co/v1
kind: Elasticsearch
metadata:
  name: elastic
  namespace: elastic
spec:
  version: 8.5.3
  nodeSets:
    - name: default
      count: 1
      podTemplate:
        spec:
          containers:
            - name: elasticsearch
              volumeMounts:
                - mountPath: /usr/share/elasticsearch/data
                  subPath: elastic-data
                  name: elastic-data-mount
      volumeClaimTemplates:
        - metadata:
            name: elastic-data-mount
          spec:
            accessModes:
              - ReadWriteOnce
            resources:
              requests:
                storage: 50Gi
            storageClassName: "" # That must be used for Provisioning PVCs on the Oracle File Storage Service
            volumeName: elastic-pv

```

Here is the error message

```auto
{
  "@timestamp": "2022-12-13T13:23:25.794Z",
  "log.level": "ERROR",
  "message": "fatal exception while booting Elasticsearch",
  "ecs.version": "1.2.0",
  "service.name": "ES_ECS",
  "event.dataset": "elasticsearch.server",
  "process.thread.name": "main",
  "log.logger": "org.elasticsearch.bootstrap.Elasticsearch",
  "elasticsearch.node.name": "elastic-es-default-0",
  "elasticsearch.cluster.name": "elastic",
  "error.type": "java.lang.IllegalStateException",
  "error.message": "failed to obtain node locks, tried [/usr/share/elasticsearch/data]; maybe these locations are not writable or multiple nodes were started on the same data path?",
  "error.stack_trace": "java.lang.IllegalStateException: failed to obtain node locks, tried [/usr/share/elasticsearch/data]; maybe these locations are not writable or multiple nodes were started on the same data path?...."
}

```

When I mount the PVC, then I can see the created `elastic-data` folder. But the folder is always empty.

I tried to change the `mountPath` to `/usr/share/elasticsearch`. Then a `config` and a `logs` folder get created, but no `data` folder.

Anybody has an idea?  
Thanks!

---

<div class="post-metadata">

**Author:** ![deepflyz](https://avatars.discourse-cdn.com/v4/letter/d/a6a055/32.png) [@deepflyz](https://discuss.elastic.co/u/deepflyz)\
**Post date:** [December 14, 2022, 7:21am UTC](https://discuss.elastic.co/t/custom-volumemounts-with-elastic-cloud-on-kubernetes/321128/2 "2022-12-14T07:21:15Z")

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After a good night sleep and another try, I could make it work by:

1. Create a new storageClass called `oci-bv-ext4`
2. Create a PersistentVolumeClaim which makes use of the new storageClass
3. Make use of the new storageClass and PVC in the Elasticsearch `volumeClaimTemplates`

Here is the yml for the storageClass and PVC

```auto
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: oci-bv-ext4
provisioner: blockvolume.csi.oraclecloud.com
reclaimPolicy: Retain # Use this or Delete
allowVolumeExpansion: true
volumeBindingMode: WaitForFirstConsumer
---
apiVersion: v1
kind: Namespace
metadata:
  name: elastic
  labels:
    name: elastic
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: elastic-data-mount-elastic-es-default-0
  namespace: elastic
spec:
  storageClassName: oci-bv-ext4
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 50Gi

```

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [January 11, 2023, 7:22am UTC](https://discuss.elastic.co/t/custom-volumemounts-with-elastic-cloud-on-kubernetes/321128/3 "2023-01-11T07:22:04Z")

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