Monitor and scale an Azure Database for MySQL server using Azure CLI

[APPLIES TO: Azure Database for MySQL - Single Server Azure Database for MySQL - Flexible Server

This sample CLI script scales compute and storage for a single Azure Database for MySQL server after querying the metrics. Compute can scale up or down. Storage can only scale up.

If you don't have an Azure subscription, create an Azure free account before you begin.

Prerequisites

• Use the Bash environment in Azure Cloud Shell. For more information, see Quickstart for Bash in Azure Cloud Shell.

  

• If you prefer to run CLI reference commands locally, install the Azure CLI. If you're running on Windows or macOS, consider running Azure CLI in a Docker container. For more information, see How to run the Azure CLI in a Docker container.

  • If you're using a local installation, sign in to the Azure CLI by using the az login command. To finish the authentication process, follow the steps displayed in your terminal. For other sign-in options, see Sign in with the Azure CLI.

  • When you're prompted, install the Azure CLI extension on first use. For more information about extensions, see Use extensions with the Azure CLI.

  • Run az version to find the version and dependent libraries that are installed. To upgrade to the latest version, run az upgrade.

Sample script

Launch Azure Cloud Shell

The Azure Cloud Shell is a free interactive shell that you can use to run the steps in this article. It has common Azure tools preinstalled and configured to use with your account.

To open the Cloud Shell, just select Try it from the upper right corner of a code block. You can also launch Cloud Shell in a separate browser tab by going to https://shell.azure.com.

When Cloud Shell opens, verify that Bash is selected for your environment. Subsequent sessions will use Azure CLI in a Bash environment, Select Copy to copy the blocks of code, paste it into the Cloud Shell, and press Enter to run it.

Sign in to Azure

Cloud Shell is automatically authenticated under the initial account signed-in with. Use the following script to sign in using a different subscription, replacing <Subscription ID> with your Azure Subscription ID. If you don't have an Azure subscription, create an Azure free account before you begin.

subscription="<subscriptionId>" # add subscription here

az account set -s $subscription # ...or use 'az login'

For more information, see set active subscription or log in interactively

Run the script

# Monitor and scale an Azure Database for MySQL server

# Variable block
let "randomIdentifier=$RANDOM*$RANDOM"
subscriptionId="$(az account show --query id -o tsv)"
location="East US"
resourceGroup="msdocs-mysql-rg-$randomIdentifier"
tag="scale-mysql-server"
server="msdocs-mysql-server-$randomIdentifier"
sku="GP_Gen5_2"
login="azureuser"
password="Pa$$w0rD-$randomIdentifier"
scaleUpSku="GP_Gen5_4"
scaleDownSku="GP_Gen5_2"
storageSize="102400"

echo "Using resource group $resourceGroup with login: $login, password: $password..."

# Create a resource group
echo "Creating $resourceGroup in $location..."
az group create --name $resourceGroup --location "$location" --tags $tag

# Create a MySQL server in the resource group
# Name of a server maps to DNS name and is thus required to be globally unique in Azure.
echo "Creating $server in $location..."
az mysql server create --name $server --resource-group $resourceGroup --location "$location" --admin-user $login --admin-password $password --sku-name $sku

# Monitor usage metrics - CPU
echo "Returning the CPU usage metrics for $server"
az monitor metrics list --resource "/subscriptions/$subscriptionId/resourceGroups/$resourceGroup/providers/Microsoft.DBforMySQL/servers/$server" --metric cpu_percent --interval PT1M

# Monitor usage metrics - Storage
echo "Returning the storage usage metrics for $server"
az monitor metrics list --resource "/subscriptions/$subscriptionId/resourceGroups/$resourceGroup/providers/Microsoft.DBforMySQL/servers/$server" --metric storage_used --interval PT1M

# Scale up the server by provisionining more vCores within the same tier
echo "Scaling up $server by changing the SKU to $scaleUpSku"
az mysql server update --resource-group $resourceGroup --name $server --sku-name $scaleUpSku

# Scale down the server by provisioning fewer vCores within the same tier
echo "Scaling down $server by changing the SKU to $scaleDownSku"
az mysql server update --resource-group $resourceGroup --name $server --sku-name $scaleDownSku

# Scale up the server to provision a storage size of 10GB
# Storage size cannot be reduced
echo "Scaling up the storage size for $server to $storageSize"
az mysql server update --resource-group $resourceGroup --name $server --storage-size $storageSize

Clean up resources

Use the following command to remove the resource group and all resources associated with it using the az group delete command - unless you have an ongoing need for these resources. Some of these resources may take a while to create, as well as to delete.

az group delete --name $resourceGroup

Sample reference

This script uses the commands outlined in the following table:

Command	Notes
az group create	Creates a resource group in which all resources are stored.
az mysql server create	Creates a MySQL server that hosts the databases.
az mysql server update	Updates properties of the MySQL server.
az monitor metrics list	List the metric value for the resources.
az group delete	Deletes a resource group including all nested resources.

Next steps

• Learn more about Azure Database for MySQL compute and storage
• Try additional scripts: Azure CLI samples for Azure Database for MySQL
• Learn more about the Azure CLI