Overview

opEvents panels are customisable views that allow you to create filtered perspectives of your event data. Each panel appears as an option in the Panels dropdown menu in the opEvents interface, giving users quick access to their specialised event views.

Configuration Location and Structure

Panels are configured in the /usr/local/omk/conf/ConfigPanels.json file. This file contains a JSON object where each key represents a unique panel configuration. You can define multiple panels within this single configuration file, and they will all appear in the Panels dropdown menu in the order they're defined.

Basic Structure

{
    "panel-identifier-1": {
        "title": "First Panel",
        "description": "Description of first panel",
        "model": "events",
        "filter": {
            "field": "filter_expression"
        }
    },
    "panel-identifier-2": {
        "title": "Second Panel",
        "description": "Description of second panel",
        "model": "events",
        "filter": {
            "field": "filter_expression"
        }
    }
}

For example a panel with the name panel-identifier-1 will create a /omk/opEvents/panels/panel-identifier-1

Filter Expressions

The filter object supports several types of matching, giving you flexibility in how you filter your events. You can choose the matching method that best suits your needs:

Simple String Matching

For straightforward matches, simply provide the string you want to match:

{
    "node-down-events": {
        "title": "Node Down Events",
        "description": "Shows all node down events",
        "model": "events",
        "filter": {
            "event": "Node Down"
        }
    }
}

Regular Expression Matching

When you need more complex pattern matching, you can use the regex: or iregex: prefixes:

• regex: - Case-sensitive regular expression matching

• iregex: - Case-insensitive regular expression matching

Example combining both simple and regex matching:

{
    "sydney-critical": {
        "title": "Sydney Critical Events",
        "description": "Critical events from Sydney data centres",
        "model": "events",
        "filter": {
            "nodeinfo.configuration_location": "Sydney",       // Simple string match
            "event": "iregex: (error|failure|outage)",         // Case-insensitive pattern match
            "nodeinfo.configuration_role": "regex: server|router|switch"   // Regex match
        }
    }
}

Filter Matching Tips

When to Use Simple String Matching

• Exact value matches (e.g., state = "Up")

• Specific locations (e.g., nodeinfo.configuration_location = "Melbourne")

When to Use Regular Expressions

• Matching multiple possible values (e.g., regex: Error|Warning|Critical)

• Pattern matching (e.g., regex: Node[0-9]+Down)

• Case-insensitive searches (e.g., iregex: sydney|melbourne|brisbane)

• Complex text patterns (e.g., regex: ^SYD-[A-Z]{2}-[0-9]{3}$)

Choose the simplest matching method that meets your needs. Simple string matching is more straightforward to understand and maintain, so use it when possible. Save regular expressions for when you need their pattern-matching power.