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Essential Guide to Setting Up Alerts for Disconnected Azure Arc Agents Using Azure Monitor

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ailona

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July 23, 2024

**** In a recent blog post, Bruno Gabrielli outlines the steps to set up alerts for disconnected Arc agents using Azure Monitor. Azure Arc enables management of hybrid cloud resources, making it crucial to receive alerts when virtual machines lose connectivity. This ensures continuous monitoring and prevents data loss, especially in critical environments.**Bullet Points:**

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Azure Monitor: Get Alerts for Disconnected Arc Agents

In the ever-evolving world of cloud computing, Azure Monitor has introduced a crucial feature for managing hybrid resources. This feature allows users to set up alerts for disconnected Arc agents. Let’s dive into the details!

What’s New?

Azure Monitor now enables users to receive alerts when hybrid virtual machines lose connection. This is vital for maintaining infrastructure health. As Bruno Gabrielli notes,

“The sooner, the better” when it comes to being alerted about disconnections.

Major Updates

Azure Arc allows management of hybrid cloud resources from a single interface. This service is essential for monitoring performance and health. By integrating with Azure Monitor, users can now receive timely alerts for disconnected agents.

When a hybrid virtual machine is disconnected, it can lead to significant issues. For instance, monitoring data may not be sent, causing customers to become “blind” to infrastructure health. Additionally, machines may cache unsent data, consuming valuable disk space.

Why Alerts Matter

Understanding why alerts for disconnected Arc agents are crucial is key. Here are two compelling reasons:

Expired Managed Identity: If a hybrid machine does not communicate for over 60 days, the identity expires. Resetting it requires offboarding and re-onboarding the machine.
Data Loss: Disconnected machines may lose monitoring data, leading to potential infrastructure issues.

As a result, creating alerts is essential for proactive management. Users can leverage Azure Resource Graph and Log Analytics to set up these alerts.

Setting Up Alerts

To create alerts, users should utilize a specific query. This query identifies monitored servers with a status of “Disconnected.” The recommended timeframe for monitoring is 15 minutes, providing a balanced approach to alerting.

Here’s a sample query to use:

arg(“”).resources | where type == “microsoft.hybridcompute/machines” | where tostring(properties.status) == “Disconnected” | extend lastContactedDate = todatetime(properties.lastStatusChange) | where lastContactedDate <= ago(15m) | project id, Computer=name, status, lastContactedDate

Executing this query will enable alerts based on the specified conditions. As Gabrielli emphasizes,

“It is necessary to create an alarm.”

Conclusion

In conclusion, Azure Monitor’s new alert feature for disconnected Arc agents is a game-changer. It enhances resource management and ensures infrastructure health. Stay informed and proactive with your hybrid cloud environment!

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Azure Arc allows centralized management of hybrid cloud resources, enhancing visibility and control.

Disconnected Arc agents can lead to significant monitoring data loss and infrastructure health issues.

Alerts can be created using Azure Resource Graph and Log Analytics for timely notifications.

The recommended alert configuration checks for disconnections within a customizable time frame.

Sample queries can be tailored to monitor specific resource statuses and trigger alerts accordingly.

From the Core Infrastructure and Security Blog