Single container with Mounted storage

An application to test Azure WebApp with Single Container deployment mounting a Blob Storage container path.

Requirements:

• Docker
• Azure CLI
• Azure Subscription

Run it

Node

Create the .env file with the path to the local storage path:

touch .env
echo STORAGE=<STORAGE PATH> >> .env

Get dependencies and start Node:

npm i
node server.js

To test it, go to http://localhost:8080/<file_name>. The program will print the content of the file from the STORAGE parameter.

Docker

Build and push the docker image:

docker build -t <your username>/node-web-app .
docker run -p 8080:8080 -v <local-dir>:<dotenv-storage-path> -d <your username>/node-web-app

You should be able test it again at this point.

Azure

Once you tested your app locally, and against docker runtime, it is ready to run on Azure:

# set common resource parameters
export group='myResourceGroup'
export location='brazilsouth'
export acr='myContainerRegistry'
export image='yourname/node-web-app'
export tag='yourname.azurecr.io/node-web-app'
export storageAccount='myStoragAccount'
export storageContainer='myfiles'
export localFilePath='/tmp/myfiles/myfile.txt'
export blobName='myfile.txt'
export plan='myPlan'
export webapp='myApp'
export storageMountId='storageMountId'
export storageMountPath='/tmp/myfiles'

# create the image registry
az login
az group create -n $group -l $location
az acr create -n $acr -g $group --sku Basic --admin-enabled true
az acr login -n $acr

# push the docker image
docker tag $image $tag
docker push $tag

# create the storage
az storage account create -n $storageAccount -g $group -l $location --kind StorageV2 --sku Standard_LRS
export key=$(az storage account keys list -n $storageAccount --query "[?keyName == 'key1'].value" -o tsv)
az storage container create -n $storageContainer --account-name $storageAccount --account-key $key

# upload a file
az storage blob upload -c $storageContainer -f $localFilePath -n $blobName --account-name $storageAccount --account-key $key

# create the Web App
az appservice plan create -n $plan -g $group -l $location --is-linux
az webapp create -g $group -p $plan -n $webapp -i $tag
az webapp config storage-account add -k $key -a $storageAccount -i $storageMountId --sn $storageContainer -t AzureBlob -m $storageMountPath -n $webapp --resource-group $group

After you finish working, clean your resources:

az group delete -n $group

Reference

Dockerizing a Node.js web app