Enable and download server slow query logs of an Azure Database for MariaDB server using Azure CLI

This sample CLI script enables and downloads the slow query logs of a single Azure Database for MariaDB server.

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

Prerequisites

You can use either the Azure Cloud Shell or a local Azure CLI.

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

# Enable server logs for MariaDB

# Variable block
let "randomIdentifier=$RANDOM*$RANDOM"
location="East US"
resourceGroup="msdocs-mariadb-rg-$randomIdentifier"
tag="server-logs-mariadb"
server="msdocs-mariadb-server-$randomIdentifier"
sku="GP_Gen5_2"
login="azureuser"
password="Pa$$w0rD-$randomIdentifier"
configurationParameter="slow_query_log"
logValue="On"

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 MariaDB 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 mariadb server create --name $server --resource-group $resourceGroup --location "$location" --admin-user $login --admin-password $password --sku-name $sku

# List the configuration options for review
echo "Returning the configuration options on $server"
az mariadb server configuration list --resource-group $resourceGroup --server $server

# Show the value of the slow_query_log server configuration parameter
echo "Returning the value of the slow_query_log server configuration parameter on $server"
az mariadb server configuration show --name $configurationParameter --resource-group $resourceGroup --server $server

# Enable the slow_query_log 
echo "Enabling the slow_query_log on $server"
az mariadb server configuration set --name $configurationParameter --resource-group $resourceGroup --server $server --value $logValue

# List the available log files
echo "Returning the list of available log files on $server"
az mariadb server-logs list --resource-group $resourceGroup --server $server

# To download log file from Azure, direct the output of the previous comment to a text file 
# "> log_files_list.txt"
# Review the text file to find the server log file name for the desired timeframe
# Substitute the <log_file_name> in the script below with your server log file name
# Creates the log file in the current command line path
# az mariadb server-logs download --name <log_file_name> $resourceGroup --server $server

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 mariadb server create Creates a MariaDB server that hosts the databases.
az mariadb server configuration list List the configuration values for a server.
az mariadb server configuration set Update the configuration of a server.
az mariadb server-logs list List log files for a server.
az mariadb server-logs download Download log files.
az group delete Deletes a resource group including all nested resources.

Next steps