Just getting started with Log Analytics. What will happen if I enable Diagnostics Logging in a VM which will send the data to a storage account that I then connect to Log Analytics and then also connect the VM directly to Log Analytics?
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 want to understand if i am sending logs from log analytics workspace to a storage account in azure, is it possible that those logs will be monitored by Azure sentinel when storage connector is used or will azure sentinel only monitor storage account logs
It sounds like you wish to read the contents of Azure Storage and ingest into Sentinel. If so, you will need a custom connector. There is an Azure Function example on GitHub here.
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.
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
I have some VMs running on Azure Service. I'd like to redirect logs from them (Windows Event Logs and MS SQL server logs) to a specific log concentrator (like Graylog). For Windows logs, I'm using Nxlog (https://nxlog.co/docs/nxlog-ce/nxlog-reference-manual.html#quickstart_windows). However, for specific (PaaS) applications such as SQL Server (PaaS in general) Nxlog does not apply.
Is there a way to redirect logs (VMs and PaaS) just using Azure (web) tools?
Most services keep their logs in a Storage Account so you can tap into that source and forward logs to your own centralized log database. You generally define the storage account at the place you enable diagnostics for the service.
Don't know what king of logs you are looking for in SQL DB, but for example the audit logs are saved in a storage account.
Azure Operations Management Suite (OMS) can ingest from dozens of services as well as custom logs. As itaysk mentioned, most services in Azure write service related diagnostic information to a storage account. It's really easy to ingest these from within OMS.
https://azure.microsoft.com/en-us/services/log-analytics/
For Azure Web Sites, you can use Application Insights and store custom metrics as well. There's also an option to continuously write these metrics to a storage account.
Here's a similar option for Azure SQL:
https://azure.microsoft.com/en-us/documentation/articles/sql-database-auditing-get-started/