List and change server parameters of Azure Database for MySQL - Flexible Server using Azure CLI

  • Article

APPLIES TO: Azure Database for MySQL - Flexible Server

This sample CLI script lists all available server parameters as well as their allowable values for Azure Database for MySQL - Flexible Server, and sets the max_connections and global time_zone parameters to values other than the default ones.

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

Prerequisites

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

Sign in to Azure

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 trail subscription, create a trial subscription before you begin.

az cloud set -n AzureChinaCloud
az login

subscription="<subscriptionId>" # add subscription here

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

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

Run the script

# Change server parameters for Azure Database for MySQL - Flexible Server

# Variable block
let "randomIdentifier=$RANDOM*$RANDOM"
location="China East 2"
resourceGroup="msdocs-mysql-rg-$randomIdentifier"
tag="configure-audit-logs-mysql"
server="msdocs-mysql-server-$randomIdentifier"
login="azureuser"
password="Pa$$w0rD-$randomIdentifier"
ipAddress="None"
# Specifying an IP address of 0.0.0.0 allows public access from any resources
# deployed within Azure to access your server. Setting it to "None" sets the server 
# in public access mode but does not create a firewall rule.
# For your public IP address, https://whatismyipaddress.com

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 Flexible server in the resource group
echo "Creating $server"
az mysql flexible-server create --name $server --resource-group $resourceGroup --location "$location" --admin-user $login --admin-password $password --public-access $ipAddress

# Optional: Add firewall rule to connect from all Azure services
# To limit to a specific IP address or address range, change start-ip-address and end-ip-address
echo "Adding firewall for IP address range"
az mysql flexible-server firewall-rule create --name $server --resource-group $resourceGroup --rule-name AllowAzureIPs --start-ip-address 0.0.0.0 --end-ip-address 0.0.0.0

# List all MySQL - Flexible Server parameters with their values and parameter descriptions
echo "List parameters and values"
az mysql flexible-server parameter list --resource-group $resourceGroup --server-name $server

# Set value of max_connections parameter
echo "Set maximum connections"
az mysql flexible-server parameter set --resource-group $resourceGroup --server-name $server --name max_connections --value 250

# Check value of max_connections paramater
echo "Check maximum connections"
az mysql flexible-server parameter show --resource-group $resourceGroup --server-name $server --name max_connections

# Set value of max_connections parameter back to default
echo "Set maximum connnections to default"
az mysql flexible-server parameter set --resource-group $resourceGroup --server-name $server --name max_connections

# Set global level time zone
echo "Set time zone"
az mysql flexible-server parameter set --resource-group $resourceGroup --server-name $server --name time_zone --value "+02:00"

# Check global level time zone
echo "Check time zone"
az mysql flexible-server parameter show --resource-group $resourceGroup --server-name $server --name time_zone

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 following commands. Each command in the table links to command specific documentation.

Command Notes
az group create Creates a resource group in which all resources are stored
az mysql flexible-server create Creates a Flexible Server that hosts the databases.
az mysql flexible-server parameter list Lists the parameter values for a flexible server.
az mysql flexible-server parameter set Updates the parameter of a flexible server.
az mysql flexible-server parameter show Get a specific parameter value for a flexible server.
az mysql flexible-server delete Deletes a Flexible Server.
az group delete Deletes a resource group including all nested resources.

Next steps