brunobastosg / grafana-elasticsearch-weighted-average-attempt

Weighted Average attempt in Grafana using Elasticsearch datasource

This is currently not working.

Requirements

• Docker

Running

Run docker compose up in the project folder and wait for all containers to be healthy.

The Grafana dashboard should be accessible at http://localhost:3000/d/grades/grades?orgId=1.

You can also browse the Elasticsearch data using Kibana at http://localhost:5601 (elastic / elastic@123). The index is called grades.

Datasource

The datasource contains grades for three students, Kelly, Mary, and Paul. Each student has four grades for each subject, Math, English, and History. Each subject has its weight.

Use Case

I need to show the weighted averages for each student in Grafana.

In Elasticsearch, this is as simple as running the following command in Dev Tools:

POST /grades/_search
{
  "size": 0,
  "aggs": {
    "students": {
      "terms": {
        "field": "studentName",
        "size": 10
      },
      "aggs": {
        "weighted_grade": {
          "weighted_avg": {
            "value": {
              "field": "grade"
            },
            "weight": {
              "field": "weight"
            }
          }
        }
      }
    }
  }
}