(ContainerAppInvalidVolumeMount) Invalid Request: Volume '' to mount doesn't defined in the Container App 'xxx'.

Question

I have created a container app and a file share following these instructions:
Tutorial: Create an Azure Files volume mount in Azure Container Apps | Microsoft Learn

After exporting the yaml, I added :
volumeMounts:
- name: simplemq
mountPath: /app/simplemq

when doing an update:
az containerapp update --name simplemqprovider --resource-group CoordinateSuisse --yaml .\simplemq.yml

I get this error:
(ContainerAppInvalidVolumeMount) Invalid Request: Volume '' to mount doesn't defined in the Container App 'simplemqprovider'.

and no volume mounted. What can be wrong?

this is my whole yaml
id: /subscriptions/{guid}/resourceGroups/CoordinateSuisse/providers/Microsoft.App/containerapps/simplemqprovider

identity:

type: None

location: Somewhere

name: simplemqprovider

properties:

configuration:

activeRevisionsMode: Single

dapr: null

ingress:

  additionalPortMappings:

  - exposedPort: 180

    external: false

    targetPort: 180

  allowInsecure: true

  clientCertificateMode: Ignore

  corsPolicy: null

  customDomains: null

  exposedPort: 0

  external: true

  fqdn: simplemqprovider.mangoplant.azurecontainerapps.io

  ipSecurityRestrictions: null

  stickySessions:

    affinity: none

  targetPort: 8080

  traffic:

  - latestRevision: true

    weight: 100

  transport: Auto

maxInactiveRevisions: 100

registries: null

secrets: null

service: null

customDomainVerificationId: 005309E732A8C2FBFACC6D42353B5C8FE5E080C246C3844A6FC169A1CC80F725

delegatedIdentities: []

environmentId: /subscriptions/{guid}/resourceGroups/CoordinateSuisse/providers/Microsoft.App/managedEnvironments/managedEnvironment-CoordinateSuiss

eventStreamEndpoint: https://somewhere.azurecontainerapps.dev/subscriptions/{guid}/resourceGroups/CoordinateSuisse/containerApps/simplemqprovider/eventstream

latestReadyRevisionName: simplemqprovider--behlioh

latestRevisionFqdn: xxx

latestRevisionName: xxx

managedEnvironmentId: /subscriptions/{guid}/resourceGroups/CoordinateSuisse/providers/Microsoft.App/managedEnvironments/managedEnvironment-CoordinateSuiss

outboundIpAddresses:

- shorted list of ip adreses

provisioningState: Succeeded

runningStatus: Running

template:

containers:

- env:

  - name: ASPNETCORE_ENVIRONMENT

    value: Development

  - name: test

    value: test

  image: docker.io/xxx:latest

  name: simplemqprovider

  probes: []

  resources:

    cpu: 0.25

    ephemeralStorage: 1Gi

    memory: 0.5Gi

  volumeMounts:

  - name: simplemq

    mountPath: /app/simplemq

initContainers: null

revisionSuffix: ''

scale:

  maxReplicas: 3

  minReplicas: 1

  rules: null

serviceBinds: null

terminationGracePeriodSeconds: null

volumes:

- name: simplemq

  storageName: simplemq

  storageType: AzureFile

workloadProfileName: Consumption

resourceGroup: CoordinateSuisse

systemData:

createdAt: '2025-03-01T21:20:26.5001332'

createdBy: ******@somehow.org

createdByType: User

lastModifiedAt: '2025-03-03T10:05:47.3019289'

lastModifiedBy: ******@somehow.org

lastModifiedByType: User

type: Microsoft.App/containerApps

Answer 1

Hi Per Schondell,

In order to set up a container app with an azure files volume mount, create a storage account and a file share where our container can mount files.

az storage account create \
  --name arkstoragedemo \
  --resource-group arkorg \
  --location centralindia \
  --sku Standard_LRS \
  --kind StorageV2

az storage share create \
  --name simplemqshare \
  --account-name arkstoragedemo

Get Storage Account Key

STORAGE_KEY=$(az storage account keys list \
  --account-name arkstoragedemo \
  --query "[0].value" --output tsv)

If you want, you can put this in a variable

Create a Container App in the arkorg resource group and configure it to mount the Azure File Share.

create an env for the same

az containerapp env create \
  --name ark-container-env \
  --resource-group arkorg \
  --location centralindia

connect your file share to this environment

az containerapp env storage set \
  --name ark-container-env \
  --resource-group arkorg \
  --storage-name simplemq \
  --azure-file-account-name arkstoragedemo \
  --azure-file-share-name simplemqshare \
  --azure-file-account-key "$STORAGE_KEY" \
  --access-mode ReadWrite

Deploy the Container App with Azure Files Mounted

Use this as reference to update your simplemq.yml

---
name: simplemqprovider
location: centralindia
type: Microsoft.App/containerApps
properties:
  environmentId: >
    /subscriptions/abcdefghijk/resourceGroups/arkorg/
    providers/Microsoft.App/managedEnvironments/ark-container-env
  configuration:
    activeRevisionsMode: Single
    ingress:
      external: true
      targetPort: 8080
      traffic:
        - latestRevision: true
          weight: 100
  template:
    containers:
      - name: simplemqprovider
        image: docker.io/library/nginx:latest
        resources:
          cpu: 0.25
          memory: 0.5Gi
        volumeMounts:
          - volumeName: simplemq
            mountPath: /app/simplemq
    volumes:
      - name: simplemq
        storageType: AzureFile
        storageName: simplemq

Now try to deploy the Container App

az containerapp create \
  --resource-group arkorg \
  --name simplemqprovider \
  --environment ark-container-env \
  --yaml simplemq.yml