Ask Bjørn Hansen
d4bf8d9e16
Add `/api/v2/test/grafana-table` endpoint to validate Grafana table format compatibility before implementing the full time range API. - Create server/grafana.go with table format structures - Add structured logging and OpenTelemetry tracing - Include realistic NTP Pool sample data with null handling - Set proper CORS and cache headers for testing - Update implementation plan with Phase 0 completion status Ready for Grafana JSON API data source integration testing.
100 lines
3.0 KiB
Go
100 lines
3.0 KiB
Go
package server
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import (
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"net/http"
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"time"
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"github.com/labstack/echo/v4"
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"go.ntppool.org/common/logger"
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"go.ntppool.org/common/tracing"
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)
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// ColumnDef represents a Grafana table column definition
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type ColumnDef struct {
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Text string `json:"text"`
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Type string `json:"type"`
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Unit string `json:"unit,omitempty"`
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}
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// GrafanaTableSeries represents a single table series in Grafana format
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type GrafanaTableSeries struct {
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Target string `json:"target"`
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Tags map[string]string `json:"tags"`
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Columns []ColumnDef `json:"columns"`
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Values [][]interface{} `json:"values"`
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}
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// GrafanaTimeSeriesResponse represents the complete Grafana table response
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type GrafanaTimeSeriesResponse []GrafanaTableSeries
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// testGrafanaTable returns sample data in Grafana table format for validation
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func (srv *Server) testGrafanaTable(c echo.Context) error {
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log := logger.Setup()
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ctx, span := tracing.Tracer().Start(c.Request().Context(), "testGrafanaTable")
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defer span.End()
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log.InfoContext(ctx, "serving test Grafana table format",
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"remote_ip", c.RealIP(),
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"user_agent", c.Request().UserAgent(),
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)
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// Generate sample data with realistic NTP Pool values
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now := time.Now()
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sampleData := GrafanaTimeSeriesResponse{
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{
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Target: "monitor{name=zakim1-yfhw4a}",
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Tags: map[string]string{
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"monitor_id": "126",
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"monitor_name": "zakim1-yfhw4a",
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"type": "monitor",
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"status": "active",
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},
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Columns: []ColumnDef{
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{Text: "time", Type: "time"},
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{Text: "score", Type: "number"},
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{Text: "rtt", Type: "number", Unit: "ms"},
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{Text: "offset", Type: "number", Unit: "s"},
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},
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Values: [][]interface{}{
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{now.Add(-10*time.Minute).Unix() * 1000, 20.0, 18.865, -0.000267},
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{now.Add(-20*time.Minute).Unix() * 1000, 20.0, 18.96, -0.000390},
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{now.Add(-30*time.Minute).Unix() * 1000, 20.0, 18.073, -0.000768},
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{now.Add(-40*time.Minute).Unix() * 1000, 20.0, 18.209, nil}, // null offset example
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},
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},
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{
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Target: "monitor{name=nj2-mon01}",
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Tags: map[string]string{
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"monitor_id": "84",
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"monitor_name": "nj2-mon01",
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"type": "monitor",
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"status": "active",
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},
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Columns: []ColumnDef{
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{Text: "time", Type: "time"},
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{Text: "score", Type: "number"},
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{Text: "rtt", Type: "number", Unit: "ms"},
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{Text: "offset", Type: "number", Unit: "s"},
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},
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Values: [][]interface{}{
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{now.Add(-10*time.Minute).Unix() * 1000, 19.5, 22.145, 0.000123},
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{now.Add(-20*time.Minute).Unix() * 1000, 19.8, 21.892, 0.000089},
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{now.Add(-30*time.Minute).Unix() * 1000, 20.0, 22.034, 0.000156},
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},
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},
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}
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// Add CORS header for browser testing
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c.Response().Header().Set("Access-Control-Allow-Origin", "*")
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c.Response().Header().Set("Content-Type", "application/json")
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// Set cache control similar to other endpoints
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c.Response().Header().Set("Cache-Control", "public,max-age=60")
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log.InfoContext(ctx, "test Grafana table response sent",
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"series_count", len(sampleData),
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"response_size_approx", "~1KB",
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)
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return c.JSON(http.StatusOK, sampleData)
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} |