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Error Code Metrics for Trend #43

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Error Code Metrics for Trend #43

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29 changes: 26 additions & 3 deletions exporter/exporter.go
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@ type Exporter struct {
asyncMetricsURI string
eventsURI string
partsURI string
qlURI string
client *http.Client

scrapeFailures prometheus.Counter
Expand All @@ -52,12 +53,17 @@ func NewExporter(uri url.URL, insecure bool, user, password string) *Exporter {
partsURI := uri
q.Set("query", "select database, table, sum(bytes) as bytes, count() as parts, sum(rows) as rows from system.parts where active = 1 group by database, table")
partsURI.RawQuery = q.Encode()


querylogURI := uri
q.Set("query", "select splitByString( ',',exception)[1] AS exceptiontype , count() from system.query_log where exception like '%Code%' group by exceptiontype")
querylogURI.RawQuery = q.Encode()

return &Exporter{
metricsURI: metricsURI.String(),
asyncMetricsURI: asyncMetricsURI.String(),
eventsURI: eventsURI.String(),
partsURI: partsURI.String(),
qlURI: querylogURI.String(),
scrapeFailures: prometheus.NewCounter(prometheus.CounterOpts{
Namespace: namespace,
Name: "exporter_scrape_failures_total",
Expand Down Expand Up @@ -172,6 +178,21 @@ func (e *Exporter) collect(ch chan<- prometheus.Metric) error {
newRowsMetric.Collect(ch)
}

qllogs, err := e.parseKeyValueResponse(e.qlURI)
if err != nil {
return fmt.Errorf("Error scraping clickhouse url %v: %v", e.qlURI, err)
}

for _, qllog := range qllogs {
newMetric := prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: namespace,
Name: metricName(qllog.key),
Help: "Number of " + qllog.key + " currently processed",
}, []string{}).WithLabelValues()
newMetric.Set(float64(qllog.value))
newMetric.Collect(ch)
}

return nil
}

Expand All @@ -197,7 +218,7 @@ func (e *Exporter) handleResponse(uri string) ([]byte, error) {
}
return nil, fmt.Errorf("Status %s (%d): %s", resp.Status, resp.StatusCode, data)
}

return data, nil
}

Expand All @@ -217,7 +238,8 @@ func (e *Exporter) parseKeyValueResponse(uri string) ([]lineResult, error) {
var results []lineResult = make([]lineResult, 0)

for i, line := range lines {
parts := strings.Fields(line)
sline := strings.Replace(line, " ", "", -1)
parts := strings.Fields(sline)
if len(parts) == 0 {
continue
}
Expand Down Expand Up @@ -319,3 +341,4 @@ func toSnake(in string) string {

// check interface
var _ prometheus.Collector = (*Exporter)(nil)