I have on-prem Linux machines, we store their logs in our Azure storage account as blobs.
Can we use Azure log analytics to collect these logs stored in the blob storage?
Yes, we can use Azure log analytics to collect the logs. There are 2 ways:
WAY-1
Try following the below steps
Fill in the required parameters and execute the script locally or in Azure Cloud Shell.
This PowerShell script downloads the logs from Azure Storage.
Convert the diagnostic logs into JSON format, as that is what the API expects.
Load custom data into Log Analytics using the HTTP Data Collector API.
For more information, you can refer to this Document
WAY-2
There is a direct process where you can install a log analytics agent in the virtual machines through Azure Monitor.
Azure Monitor collects the data directly from your physical or virtual Linux computers in your environment into a Log Analytics workspace for detailed analysis and correlation using the azure log analytics agents.
Steps to follow in order to collect data from data center using Azure monitor
STEP - 1: Install the log analytics agent for Linux
Enter the log analytics workspace id and primary key in the following command.
wget https://raw.githubusercontent.com/Microsoft/OMS-Agent-for-Linux/master/installer/scripts/onboard_agent.sh && sh onboard_agent.sh -w <YOUR WORKSPACE ID> -s <YOUR WORKSPACE PRIMARY KEY>
2. Enter the log analytics workspace id in the following command and restart the agent
sudo /opt/microsoft/omsagent/bin/service_control restart [<workspace id>]
STEP - 2: Collect the event and performance data
Azure portal --> Log Analytics --> Log Analytics workspace --> Advance settings --> Data --> Syslog --> '+' sign.
Uncheck the severities Info, Notice, Debug and then Apply.
Now go to Linux Performance counters and click Add Recommended Counters and click Apply.
STEP - 3: View Collected Data
Log Analytics Workspace --> Logs (from the left pane)
On the Logs query page, type Perf in the query editor and select Run.
For more information, you can refer to this Blog.
Related
For storing Azure SQL database logs, is it necessary to explicitly create blob for logs storage or it is implicitly created. I read this and this post but still not sure about it?
Also, for Java/Spring application deployed in App Services, when using App Insights, Log Analytics and Azure Monitor for Application logs, HTTP and Access logs and DB logs, do I need to explicitly setup blob for storing logs?
No, you do not need to create a blob storage for Azure SQL database logs as they are stored in Azure SQL database transaction logs and can be viewed using Azure Monitor or audited using Azure SQL Auditing.
Steps to check the Logs in SQL DB under Monitor section.
After creating azure SQL database and server.
Go to monitoring tab as mentioned in below screenshot and the logs can be viewed.
Approach 2
Using Log Analytics
Create a Log analytics workspace in Azure.
And go to the SQL Database and choose the Diagnostics from left pane in monitoring tab.
Add a diagnostic setting and choose the created log analytics and choose the log option as mentioned in below screenshot.
You can find the logs as shown below.
To store the Azure SQL Logs explicitly
You need to create 'Storage Account' for storing logs.
And have to enable Azure Monitor Logs from your SQL server and select 'Diagnostic logs' from the Azure Monitor menu and then, turn on the logs and select the storage account you created.
And configure log retention by selecting the Logs tab in the Azure Monitor menu, and then choose 'Retention policy' to configure how long logs will be retained.
To verify logs in the storage account, go to the storage account and select 'Containers.' You should see a container named 'insights-logs-sqlserverauditlog.' You can then browse the logs stored in this container.
I am trying to get Users logged in information in Azure SQL Database Using Log Analytics. Can it be possible if so, can you please help me on this ?
Below are Options available in Diagnostic Settings for Azure SQL Database.
Click 'Add Diagnostic setting' above to configure the collection of the following data:
DmsWorkers
ExecRequests
RequestSteps
SqlRequests
Waits
Basic
InstanceAndAppAdvanced
WorkloadManagement
I want to achieve this without using Sys schemas objects related to Azure SQL Databases.
Thanks,
Brahma
You need to enable Auditing in Azure SQL Server using and then you can check the logs in Azure Log Analytics.
Easiest way to enable auditing is through the Azure Portal. However, it can be easily set up through ARM templates, Azure Powershell, Azure CLI.
Auditing can be enabled either at the individual database level or at the logical server level. If enabled at the server level then it automatically applies to existing databases and any new databases that are created.
However, enabling both at the server and database level leads to duplicate logs.
In the homepage of the desired Azure Sql server, in the left pane there is an option for “Auditing”.
By default, Auditing is off. Enable it. Choose the Log Analytics Workspace where you need to store the logs. Click on Save.
Click on Add diagnostics setting. Let us enable diagnostics for errors and InstanceAndAppAdvanced. Send this data to the log analytics workspace using your subscription and log analytics workspace. Click on Save for the configuration.
To view the logs, open up the Log Analytics workspace that was configured as a sink and choose logs and select the scope.
Summarizing the connection attempts by caller IP addresses
AzureDiagnostics
|summarize count() by client_ip_s
Source: https://www.mssqltips.com/sqlservertip/6782/kusto-query-language-query-audit-data-azure-sql-database/
how would you go about collecting all the audit failure data from the security log of a virtual machine to an Azure Storage account
I assume you are mainly interested in logon failures to your virtual machines. If this is the case, you can enable Standard tier Security Center and create a Log Analytics workspace.
After you have deployed the Log Analytics workspace you can connect it to your VM and collect event log data. Go to Logs under the Monitoring section of your VM and assign it to your Log Analytics workspace.
I have a storage account datalake Gen2.
I need to connect my storage account logs to a Log analytics workspace.
But there is no Diagnostic Settings menu, so I don't know how to do.
I think this was supported by datalake Gen1, but is there a workaround for datalake gen 2?
thank you
There is a Diagnostic settings option at the end of the left sidebar, but you have to scroll quite a bit to find it.
Sadly, i believe currently there is no such option to automatically send diagnostic logs to a log analytics workspace. The active logs will be generated inside a folder named "$logs" located on the root path of your storage account, its only visible through Azure storage explorer.
Microsoft provides a Powershell script located at Azure GitHub which aims to upload the log files generated to a log analytics workspace of your choice.
You can refer to this official guide from Microsoft to build this workflow to send your logs to log analytics: Querying Azure Storage logs in Azure Monitor Log Analytics
Our Project is a Java Spring boot application, We have a logging system using log4j, Which we are pushing into the Azure Storage accounts.
Question:
I want to query these custom logs in OMS. (Is it possible)
If Yes how.
Till now what i have tried is.
1. Pushed the logs in Blob storage using Logback and container looks like
Pushed logs in table storage
And configured Storage accounts in log analytics in Azure workspace
But i am unable to see any Analytic data to query in OMS .
Please help.
If you can't use Application Insights, you can read logs files from Storage and use HTTP Data Collector API to push logs into Log Analytics workspace. Samples and reference: https://learn.microsoft.com/en-us/azure/log-analytics/log-analytics-data-collector-api