ACI + Azure File Share: not sharing

Question

Hi,

I have a small Go (test) program:

package main

import (  
"log"  
"os"  
)  
  
func main() {  
// log to custom file  
LOG_FILE := "/app/logs/log.txt"  
// open log file  
//f, err := os.OpenFile(LOG_FILE, os.O_APPEND|os.O_RDWR|os.O_CREATE, 0644)  
f, err := os.OpenFile(LOG_FILE, os.O_APPEND|os.O_RDWR|os.O_CREATE, 0666)  
if err != nil {  
// log.Fatalf("error opening file: %v", err)  
log.Panic(err)  
}  
defer f.Close()  
  
// set log out put  
log.SetOutput(f)  
  
// optional: log date-time, filename, and line number  
log.SetFlags(log.Lshortfile | log.LstdFlags)  
  
log.Println("Logging to custom file")  
}  

and a Dockerfile

# syntax=docker/dockerfile:1  
  
FROM golang:1.19.3-alpine  
  
WORKDIR /app  
  
ARG LOG_DIR=/app/logs  
RUN mkdir -p ${LOG_DIR}  
  
ADD main main  
  
VOLUME [${LOG_DIR}]  
  
CMD [ "./main" ]  

(Remark: go app is compiled as: "go build -o main .")

• Pushed the image to Azure Container Registry.
• Created an Azure Storage Account with a File Share

Then run:

az container create \  
--resource-group myrg \  
--name aci-test \  
--ip-address public \  
--restart-policy Never \  
--image xxx.azurecr.io/go-docker-volume:dev \  
--cpu 1 \  
--memory 1 \  
--registry-login-server xxx.azurecr.io \  
--registry-username xxx \  
--registry-password myregistrypassword \  
--os-type linux \  
--azure-file-volume-account-name mystacc \  
--azure-file-volume-account-key mysecretkey \  
--azure-file-volume-share-name acishare \  
--azure-file-volume-mount-path /data  

After running this script:

{  
  "containers": [  
    {  
      "command": null,  
      "environmentVariables": [],  
      "image": "xxx.azurecr.io/go-docker-volume:dev",  
      "instanceView": {  
        "currentState": {  
          "detailStatus": "Completed",  
          "exitCode": 0,  
          "finishTime": "2022-12-03T10:51:41.350000+00:00",  
          "startTime": "2022-12-03T10:51:36.551000+00:00",  
          "state": "Terminated"  
        },  
        "events": [],  
        "previousState": null,  
        "restartCount": 0  
      },  
      "livenessProbe": null,  
      "name": "aci-test",  
      "ports": [  
        {  
          "port": 80,  
          "protocol": "TCP"  
        }  
      ],  
      "readinessProbe": null,  
      "resources": {  
        "limits": null,  
        "requests": {  
          "cpu": 1.0,  
          "gpu": null,  
          "memoryInGb": 1.0  
        }  
      },  
      "volumeMounts": [  
        {  
          "mountPath": "/data",  
          "name": "azurefile",  
          "readOnly": null  
        }  
      ]  
    }  
  ],  
  "diagnostics": null,  
  "dnsConfig": null,  
  "encryptionProperties": null,  
  "id": "/subscriptions/xxx/resourceGroups/xxx/providers/Microsoft.ContainerInstance/containerGroups/aci-test",  
  "identity": null,  
  "imageRegistryCredentials": [  
    {  
      "identity": null,  
      "identityUrl": null,  
      "password": null,  
      "server": "xxx.azurecr.io",  
      "username": "xxx"  
    }  
  ],  
  "initContainers": [],  
  "instanceView": {  
    "events": [  
      {  
        "count": 1,  
        "firstTimestamp": "2022-12-03T10:51:35.325000+00:00",  
        "lastTimestamp": "2022-12-03T10:51:35.325000+00:00",  
        "message": "Successfully mounted Azure File Volume.",  
        "name": "SuccessfulMountAzureFileVolume",  
        "type": "Normal"  
      }  
    ],  
    "state": "Succeeded"  
  },  
  "ipAddress": {  
    "dnsNameLabel": null,  
    "fqdn": null,  
    "ip": "xx.xx.xx.xx",  
    "ports": [  
      {  
        "port": 80,  
        "protocol": "TCP"  
      }  
    ],  
    "type": "Public"  
  },  
  "location": "westeurope",  
  "name": "aci-test",  
  "osType": "Linux",  
  "provisioningState": "Succeeded",  
  "resourceGroup": "xxx",  
  "restartPolicy": "Never",  
  "sku": "Standard",  
  "subnetIds": null,  
  "tags": {},  
  "type": "Microsoft.ContainerInstance/containerGroups",  
  "volumes": [  
    {  
      "azureFile": {  
        "readOnly": null,  
        "shareName": "acishare",  
        "storageAccountKey": null,  
        "storageAccountName": "xxx"  
      },  
      "emptyDir": null,  
      "gitRepo": null,  
      "name": "azurefile",  
      "secret": null  
    }  
  ],  
  "zones": null  
}  

However, I don't see a file (log.txt with 1 line) appearing in my File Share?! Using Docker locally works fine.

Anyone can tell me what I'm missing?

Thanks.
Guy