mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-15 16:30:55 +01:00
5c049bf4dd
This feature may be useful for using `vmalert` with PromQL compatible datasources like Loki.
191 lines
7.5 KiB
Go
191 lines
7.5 KiB
Go
package main
|
|
|
|
import (
|
|
"context"
|
|
"flag"
|
|
"fmt"
|
|
"net/http"
|
|
"net/url"
|
|
"os"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmalert/datasource"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmalert/notifier"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmalert/remotewrite"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/buildinfo"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/envflag"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/fasttime"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/flagutil"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/httpserver"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/procutil"
|
|
"github.com/VictoriaMetrics/metrics"
|
|
)
|
|
|
|
var (
|
|
rulePath = flagutil.NewArray("rule", `Path to the file with alert rules.
|
|
Supports patterns. Flag can be specified multiple times.
|
|
Examples:
|
|
-rule /path/to/file. Path to a single file with alerting rules
|
|
-rule dir/*.yaml -rule /*.yaml. Relative path to all .yaml files in "dir" folder,
|
|
absolute path to all .yaml files in root.`)
|
|
|
|
validateTemplates = flag.Bool("rule.validateTemplates", true, "Whether to validate annotation and label templates")
|
|
validateExpressions = flag.Bool("rule.validateExpressions", true, "Whether to validate rules expressions via MetricsQL engine")
|
|
|
|
httpListenAddr = flag.String("httpListenAddr", ":8880", "Address to listen for http connections")
|
|
|
|
datasourceURL = flag.String("datasource.url", "", "Victoria Metrics or VMSelect url. Required parameter."+
|
|
" E.g. http://127.0.0.1:8428")
|
|
basicAuthUsername = flag.String("datasource.basicAuth.username", "", "Optional basic auth username for -datasource.url")
|
|
basicAuthPassword = flag.String("datasource.basicAuth.password", "", "Optional basic auth password for -datasource.url")
|
|
|
|
remoteWriteURL = flag.String("remoteWrite.url", "", "Optional URL to Victoria Metrics or VMInsert where to persist alerts state"+
|
|
" in form of timeseries. E.g. http://127.0.0.1:8428")
|
|
remoteWriteUsername = flag.String("remoteWrite.basicAuth.username", "", "Optional basic auth username for -remoteWrite.url")
|
|
remoteWritePassword = flag.String("remoteWrite.basicAuth.password", "", "Optional basic auth password for -remoteWrite.url")
|
|
remoteWriteMaxQueueSize = flag.Int("remoteWrite.maxQueueSize", 1e5, "Defines the max number of pending datapoints to remote write endpoint")
|
|
remoteWriteMaxBatchSize = flag.Int("remoteWrite.maxBatchSize", 1e3, "Defines defines max number of timeseries to be flushed at once")
|
|
remoteWriteConcurrency = flag.Int("remoteWrite.concurrency", 1, "Defines number of readers that concurrently write into remote storage")
|
|
|
|
remoteReadURL = flag.String("remoteRead.url", "", "Optional URL to Victoria Metrics or VMSelect that will be used to restore alerts"+
|
|
" state. This configuration makes sense only if `vmalert` was configured with `remoteWrite.url` before and has been successfully persisted its state."+
|
|
" E.g. http://127.0.0.1:8428")
|
|
remoteReadUsername = flag.String("remoteRead.basicAuth.username", "", "Optional basic auth username for -remoteRead.url")
|
|
remoteReadPassword = flag.String("remoteRead.basicAuth.password", "", "Optional basic auth password for -remoteRead.url")
|
|
remoteReadLookBack = flag.Duration("remoteRead.lookback", time.Hour, "Lookback defines how far to look into past for alerts timeseries."+
|
|
" For example, if lookback=1h then range from now() to now()-1h will be scanned.")
|
|
|
|
evaluationInterval = flag.Duration("evaluationInterval", time.Minute, "How often to evaluate the rules")
|
|
notifierURL = flag.String("notifier.url", "", "Prometheus alertmanager URL. Required parameter. e.g. http://127.0.0.1:9093")
|
|
externalURL = flag.String("external.url", "", "External URL is used as alert's source for sent alerts to the notifier")
|
|
)
|
|
|
|
func main() {
|
|
// Write flags and help message to stdout, since it is easier to grep or pipe.
|
|
flag.CommandLine.SetOutput(os.Stdout)
|
|
flag.Usage = usage
|
|
envflag.Parse()
|
|
buildinfo.Init()
|
|
logger.Init()
|
|
checkFlags()
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
eu, err := getExternalURL(*externalURL, *httpListenAddr, false)
|
|
if err != nil {
|
|
logger.Fatalf("can not get external url: %s ", err)
|
|
}
|
|
notifier.InitTemplateFunc(eu)
|
|
|
|
manager := &manager{
|
|
groups: make(map[uint64]*Group),
|
|
storage: datasource.NewVMStorage(*datasourceURL, *basicAuthUsername, *basicAuthPassword, &http.Client{}),
|
|
notifier: notifier.NewAlertManager(*notifierURL, func(group, alert string) string {
|
|
return fmt.Sprintf("%s/api/v1/%s/%s/status", eu, group, alert)
|
|
}, &http.Client{}),
|
|
}
|
|
if *remoteWriteURL != "" {
|
|
c, err := remotewrite.NewClient(ctx, remotewrite.Config{
|
|
Addr: *remoteWriteURL,
|
|
Concurrency: *remoteWriteConcurrency,
|
|
MaxQueueSize: *remoteWriteMaxQueueSize,
|
|
MaxBatchSize: *remoteWriteMaxBatchSize,
|
|
FlushInterval: *evaluationInterval,
|
|
BasicAuthUser: *remoteWriteUsername,
|
|
BasicAuthPass: *remoteWritePassword,
|
|
})
|
|
if err != nil {
|
|
logger.Fatalf("failed to init remotewrite client: %s", err)
|
|
}
|
|
manager.rw = c
|
|
}
|
|
if *remoteReadURL != "" {
|
|
manager.rr = datasource.NewVMStorage(*remoteReadURL, *remoteReadUsername, *remoteReadPassword, &http.Client{})
|
|
}
|
|
|
|
if err := manager.start(ctx, *rulePath, *validateTemplates, *validateExpressions); err != nil {
|
|
logger.Fatalf("failed to start: %s", err)
|
|
}
|
|
|
|
go func() {
|
|
// init reload metrics with positive values to improve alerting conditions
|
|
configSuccess.Set(1)
|
|
configTimestamp.Set(fasttime.UnixTimestamp())
|
|
sigHup := procutil.NewSighupChan()
|
|
for {
|
|
<-sigHup
|
|
configReloads.Inc()
|
|
logger.Infof("SIGHUP received. Going to reload rules %q ...", *rulePath)
|
|
if err := manager.update(ctx, *rulePath, *validateTemplates, *validateExpressions, false); err != nil {
|
|
configReloadErrors.Inc()
|
|
configSuccess.Set(0)
|
|
logger.Errorf("error while reloading rules: %s", err)
|
|
continue
|
|
}
|
|
configSuccess.Set(1)
|
|
configTimestamp.Set(fasttime.UnixTimestamp())
|
|
logger.Infof("Rules reloaded successfully from %q", *rulePath)
|
|
}
|
|
}()
|
|
|
|
rh := &requestHandler{m: manager}
|
|
go httpserver.Serve(*httpListenAddr, rh.handler)
|
|
|
|
sig := procutil.WaitForSigterm()
|
|
logger.Infof("service received signal %s", sig)
|
|
if err := httpserver.Stop(*httpListenAddr); err != nil {
|
|
logger.Fatalf("cannot stop the webservice: %s", err)
|
|
}
|
|
cancel()
|
|
manager.close()
|
|
}
|
|
|
|
var (
|
|
configReloads = metrics.NewCounter(`vmalert_config_last_reload_total`)
|
|
configReloadErrors = metrics.NewCounter(`vmalert_config_last_reload_errors_total`)
|
|
configSuccess = metrics.NewCounter(`vmalert_config_last_reload_successful`)
|
|
configTimestamp = metrics.NewCounter(`vmalert_config_last_reload_success_timestamp_seconds`)
|
|
)
|
|
|
|
func getExternalURL(externalURL, httpListenAddr string, isSecure bool) (*url.URL, error) {
|
|
if externalURL != "" {
|
|
return url.Parse(externalURL)
|
|
}
|
|
hname, err := os.Hostname()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
port := ""
|
|
if ipport := strings.Split(httpListenAddr, ":"); len(ipport) > 1 {
|
|
port = ":" + ipport[1]
|
|
}
|
|
schema := "http://"
|
|
if isSecure {
|
|
schema = "https://"
|
|
}
|
|
return url.Parse(fmt.Sprintf("%s%s%s", schema, hname, port))
|
|
}
|
|
|
|
func checkFlags() {
|
|
if *notifierURL == "" {
|
|
flag.PrintDefaults()
|
|
logger.Fatalf("notifier.url is empty")
|
|
}
|
|
if *datasourceURL == "" {
|
|
flag.PrintDefaults()
|
|
logger.Fatalf("datasource.url is empty")
|
|
}
|
|
}
|
|
|
|
func usage() {
|
|
const s = `
|
|
vmalert processes alerts and recording rules.
|
|
|
|
See the docs at https://github.com/VictoriaMetrics/VictoriaMetrics/blob/master/app/vmalert/README.md .
|
|
`
|
|
|
|
f := flag.CommandLine.Output()
|
|
fmt.Fprintf(f, "%s\n", s)
|
|
flag.PrintDefaults()
|
|
}
|