Alert routing allows you to configure rules to ensure that alerts are routed to the right responder with the help of event tags attached to each alert.

For each service, you can define your routing rules.

You can set this up by going to your Squadcast account

• Go to the relevant service
• Click on the options dropdown
• Choose "Routing Rules"

Create your Routing Rule

You can add your rule expression in the field "Routing Expression" or create the rule using the dropdown and then add the user, squad or escalation policy that the tagged alert should be routed to.

You can add as many routing rules with the "Add new rule" button.

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Escalation Override

The alert routing feature will route incidents based on the rules set in and will override the default escalation policy for the service if a rule matches.

By default, when a new rule is being created, a user is prompted to use the drop-down blocks for convenience in-order to create a routing rule. As you build the expression from these drop-downs, simultaneously you can see the corresponding routing expression raw string for the same, just to ensure that you are building the right rule.

The drop-down blocks are beginner friendly for sure, but they aren't as flexible as raw string method.
If you want more flexibility while building your expressions, you may opt anytime to switch to use the raw string mode by clicking the edit button as shown.

The method of specifying one rule is independent from others in the same service as well.
So, for the same service, you may have few rules in drop-down block mode, few in raw-string mode.

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Note

1. Once you opt for the raw-string method, you can't revert back to the drop-down blocks for that specific rule.

2. The drop-down blocks only support logical AND operator between 2 expressions. If you want to have a logical OR operation between 2 expressions, then you would have to create a new routing rule instead ..

Rule Execution Priority

You can add as many rules by selecting the "Add rule" button below. The routing will be true for the first rule that matches in the list of rules added by you.

So, you can rearrange the rules to prioritize them suitably by using the Move Up and Move Down buttons on the top-right corner of the Change Execution Priority segment.

Syntax for rules (For Raw String method)

The rule engine supports expressions with parameters, arithmetic, logical, and string operations.

• Basic expression: 10 > 0, 1+2, 100/3
• Parameterized expression: tags.severity == "high"
  The available parameters are tags
  • tags : This parameter contains the all the configured tags for a given service
• Regular expression: re(tags.severity, "high.*")
  This can be used to check if a particular tag field matches a regular expression.

Example

For a sample content shown in the right panel of the configuration space

{
    "tags" : {
        
             "severity" : ["critical", "high", "low"]
        
    }
}

Use Case

When severity is critical : Route to an squad
When severity is high : Route to an escalation policy
When severity is low : Route to a user

Rules

When tags.severity == "critical" route to a squad
When tags.severity == "high" route to an escalation policy
When tags.severity == "low" route to a user