VictoriaMetrics/lib/influxutils/influxutils.go
Zakhar Bessarab 9877a5e7d5
app/{vminsert,vmagent}: add healthcheck for influx ingestion endpoints (#6749)
### Describe Your Changes

This is useful for clients which validate InfluxDB is available before
data ingestion can be started.

See: https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6653

### Checklist

The following checks are **mandatory**:

- [x] My change adheres [VictoriaMetrics contributing
guidelines](https://docs.victoriametrics.com/contributing/).

---------

Signed-off-by: Zakhar Bessarab <z.bessarab@victoriametrics.com>
Signed-off-by: hagen1778 <roman@victoriametrics.com>
Co-authored-by: hagen1778 <roman@victoriametrics.com>
2024-08-05 09:34:54 +02:00

41 lines
1.6 KiB
Go

package influxutils
import (
"fmt"
"net/http"
"strings"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/flagutil"
)
var influxDatabaseNames = flagutil.NewArrayString("influx.databaseNames", "Comma-separated list of database names to return from /query and /influx/query API. "+
"This can be needed for accepting data from Telegraf plugins such as https://github.com/fangli/fluent-plugin-influxdb")
// WriteDatabaseNames writes influxDatabaseNames to w.
func WriteDatabaseNames(w http.ResponseWriter) {
// Emulate fake response for influx query.
// This is required for TSBS benchmark and some Telegraf plugins.
// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1124
w.Header().Set("Content-Type", "application/json")
dbNames := *influxDatabaseNames
if len(dbNames) == 0 {
dbNames = []string{"_internal"}
}
dbs := make([]string, len(dbNames))
for i := range dbNames {
dbs[i] = fmt.Sprintf(`[%q]`, dbNames[i])
}
fmt.Fprintf(w, `{"results":[{"statement_id":0,"series":[{"name":"databases","columns":["name"],"values":[%s]}]}]}`, strings.Join(dbs, ","))
}
// WriteHealthCheckResponse writes response for influx ping to w.
func WriteHealthCheckResponse(w http.ResponseWriter) {
// Emulate fake response for influx ping.
// This is needed for some clients to detect whether InfluxDB is available.
// See:
// - https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6653
// - https://docs.influxdata.com/influxdb/v2/api/#operation/GetHealth
fmt.Fprintf(w, `{"name":"influxdb", "message":"ready for queries and writes", "status":"pass", "checks":[]}`)
}