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Cloudwatch Dashboard Variables in Custom Widgets

1

Hi,

I'm trying to develop a custom widget for a cloudwatch dashboard that uses a dashboard variable: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/cloudwatch_dashboard_variables.html

Can you get access to the current variable value in the lambda of a custom dashboard widget? I don't see it in the sample lambda event shown here: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/add_custom_widget_dashboard_about.html

I've printed out the event of a custom widget lambda and don't see any dashboard variable values there. I've also tried to add it to the custom widget parameters via $VARNAME, VARNAME, etc with no success. Maybe it's just not supported yet since dashboard variables are relatively new?

Thanks

Topics
ServerlessManagement & GovernanceComputeNetworking & Content Delivery
Tags
Amazon CloudWatchAWS Lambda
Language
English
asked 3 years ago4.4K views
1 Answer
1

The values of the variables don't get sent to the custom widget as such. Your custom widget needs to be configured with parameters sent to it - and the variable can change value of those parameters. It works the same way all other widgets work.

Posting your dashboard JSON somewhere would help, I can probably show you how to "fix it"

AWS
answered 3 years ago
  • Caleb Palmer
    3 years ago

    Thanks I figured it out based on your hint. I just added a parameter with the same name as the dashboard variable as in input to the custom widget.

  • Mike Meaney
    3 years ago

    Great, glad you figured it out 👍

  • Sukh
    a year ago

    Hi Any chance, if you can suggest how to fix this, I am trying to achieve same -

    {
    "variables": [
        {
            "type": "property",
            "property": "view",
            "inputType": "select",
            "id": "type",
            "label": "Logs Type",
            "defaultValue": "complete",
            "visible": true,
            "values": [
                {
                    "value": "pending",
                    "label": "Pending"
                },
                {
                    "value": "in_progress",
                    "label": "In Progress"
                },
                {
                    "value": "error",
                    "label": "Error"
                },
                {
                    "value": "complete",
                    "label": "Complete"
                }
            ]
        }
    ],
    "widgets": [
        {
            "height": 7,
            "width": 24,
            "y": 0,
            "x": 0,
            "type": "log",
            "properties": {
                "query": "SOURCE '/aws/lambda/lambda-reporting' | fields jsonParse(@message) as js\n  | display @logStream, js.app, js.status, js.message",
                "region": "ap-southeast-2",
                "stacked": false,
                "view": "table"
            }
        }
    ]
}

    I need this query to be updated based on value of type variable.....

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