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Creating an alert with Azure Portal

From the Azure Monitor overview blade, in the left-hand menu, select Alerts. You can also go to the alerts settings by clicking on Create alert in order to create an alert directly.
In the Alerts blade, click on + New alert rule in the top menu
The Create rule blade is displayed. Here, you can create the rule and action groups. To create a new rule, you need to first select the resource. Click on the Select button under the RESOURCE section:
In the next blade, you can filter by the subscription and resource type. Select Virtual machines:
Select the VM that we created in the previous chapter from the list and click Done.
Now that we have a resource selected, we’re going to set up the condition. Click on Add condition.
The condition blade is open, and so we can filter by a certain signal. Select Percentage CPU and click Done
Next, you can set the alert logic for this alert. You can choose multiple operators, set the aggregation type, and set the threshold value for this alert. Set the following:
1. Operator: Greater than
2. Aggregation type: Average
3. Threshold Value: 90%
Leave Evaluated based on with its default settings.
This alert will notify you when the CPU of the virtual machines is greater than 90% over a five minute period of time. Azure Monitor will check this every minute:
Click on Done to create this condition.
Now, we have to create an action group to send the alert to. This is then responsible for handling the alert and taking further action on it. The action group that you create here can be reused across other alerts as well. So, in our case, we will create an email action group that will send out an email to a certain email address. After its creation, you can add this existing action group to other alerts. Under Action group, select the Create new button.
In the Action Group blade, add the following settings:
1. Action group name: Send email
2. Short name: email
3. Subscription: Select the subscription where the VM is created, as well
4. Resource group: Select Your RG
Then, we have to provide the actual action. Add the following values:
1. Action name: email
2. Action type: Email/SMS/Push/Voice
Then, select Edit details and select the Email checkbox. Provide an email address and click on the OK button
Click on OK again.
Finally, you have to specify an alert name, set the severity level of the alert, and click on Create alert rule
We have now created an alert and an action group that will alert a user via email when the CPU goes over 90%. In the next section, we’re going to configure diagnostic settings on resources.

Creating an alert with Azure Portal

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