mirror of
https://github.com/openziti/zrok.git
synced 2024-11-22 08:03:49 +01:00
63 lines
1.7 KiB
Go
63 lines
1.7 KiB
Go
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package controller
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import (
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"context"
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"fmt"
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"github.com/sirupsen/logrus"
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"net/http"
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)
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func HealthCheckHTTP(w http.ResponseWriter, _ *http.Request) {
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if err := healthCheckStore(w); err != nil {
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logrus.Error(err)
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return
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}
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if err := healthCheckMetrics(w); err != nil {
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logrus.Error(err)
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return
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}
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w.Header().Set("Content-Type", "text/html; charset=utf-8")
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w.Write([]byte("<html><body><h1>Healthy</h1></body></html>"))
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}
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func healthCheckStore(w http.ResponseWriter) error {
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trx, err := str.Begin()
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if err != nil {
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http.Error(w, "error starting transaction", http.StatusInternalServerError)
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return err
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}
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defer func() {
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_ = trx.Rollback()
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}()
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count := -1
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if err := trx.QueryRowx("select count(0) from migrations").Scan(&count); err != nil {
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http.Error(w, "error selecting migration count", http.StatusInternalServerError)
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return err
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}
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logrus.Debugf("%d migrations", count)
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return nil
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}
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func healthCheckMetrics(w http.ResponseWriter) error {
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if cfg.Metrics != nil && cfg.Metrics.Influx != nil {
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queryApi := idb.QueryAPI(cfg.Metrics.Influx.Org)
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query := fmt.Sprintf("from(bucket: \"%v\")\n", cfg.Metrics.Influx.Bucket) +
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fmt.Sprintf("|> range(start: -5s)\n") +
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"|> filter(fn: (r) => r[\"_measurement\"] == \"xfer\")\n" +
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"|> filter(fn: (r) => r[\"_field\"] == \"rx\" or r[\"_field\"] == \"tx\")\n" +
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"|> filter(fn: (r) => r[\"namespace\"] == \"backend\")\n" +
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"|> sum()"
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result, err := queryApi.Query(context.Background(), query)
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if err != nil {
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http.Error(w, "error querying influx", http.StatusInternalServerError)
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return err
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}
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results := 0
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for result.Next() {
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results++
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}
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logrus.Debugf("%d results", results)
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}
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return nil
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}
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