mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-11-21 14:44:00 +00:00
14c20c1843
* vmalert: support object storage for rules Support loading of alerting and recording rules from object storages `gcs://`, `gs://`, `s3://`. * review fixes
385 lines
14 KiB
Go
385 lines
14 KiB
Go
package main
|
|
|
|
import (
|
|
"context"
|
|
"flag"
|
|
"fmt"
|
|
"net/url"
|
|
"os"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmalert/config"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmalert/datasource"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmalert/notifier"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmalert/remoteread"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmalert/remotewrite"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmalert/templates"
|
|
"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/VictoriaMetrics/lib/pushmetrics"
|
|
"github.com/VictoriaMetrics/metrics"
|
|
)
|
|
|
|
var (
|
|
rulePath = flagutil.NewArrayString("rule", `Path to the files with alert rules.
|
|
Example: gs://bucket/path/to/rules, s3://bucket/path/to/rules, or fs:///path/to/local/rules/dir
|
|
If scheme remote storage scheme is omitted, local file system is used.
|
|
Local file system supports hierarchical patterns and regexes.
|
|
Remote file system supports only matching by prefix, e.g. s3://bucket/dir/rule_ will match all files with prefix
|
|
rule_ in folder dir.
|
|
This flag can be specified multiple times.
|
|
Examples:
|
|
-rule="/path/to/file". Path to a single file with alerting rules
|
|
-rule="dir/*.yaml" -rule="/*.yaml" -rule="gcs://vmalert-rules/tenant_%{TENANT_ID}/prod".
|
|
Rule files may contain %{ENV_VAR} placeholders, which are substituted by the corresponding env vars
|
|
`)
|
|
|
|
ruleTemplatesPath = flagutil.NewArrayString("rule.templates", `Path or glob pattern to location with go template definitions
|
|
for rules annotations templating. Flag can be specified multiple times.
|
|
Examples:
|
|
-rule.templates="/path/to/file". Path to a single file with go templates
|
|
-rule.templates="dir/*.tpl" -rule.templates="/*.tpl". Relative path to all .tpl files in "dir" folder,
|
|
absolute path to all .tpl files in root.`)
|
|
|
|
rulesCheckInterval = flag.Duration("rule.configCheckInterval", 0, "Interval for checking for changes in '-rule' files. "+
|
|
"By default the checking is disabled. Send SIGHUP signal in order to force config check for changes. DEPRECATED - see '-configCheckInterval' instead")
|
|
|
|
configCheckInterval = flag.Duration("configCheckInterval", 0, "Interval for checking for changes in '-rule' or '-notifier.config' files. "+
|
|
"By default the checking is disabled. Send SIGHUP signal in order to force config check for changes.")
|
|
|
|
httpListenAddr = flag.String("httpListenAddr", ":8880", "Address to listen for http connections. See also -httpListenAddr.useProxyProtocol")
|
|
useProxyProtocol = flag.Bool("httpListenAddr.useProxyProtocol", false, "Whether to use proxy protocol for connections accepted at -httpListenAddr . "+
|
|
"See https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt")
|
|
evaluationInterval = flag.Duration("evaluationInterval", time.Minute, "How often to evaluate the rules")
|
|
|
|
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")
|
|
maxResolveDuration = flag.Duration("rule.maxResolveDuration", 0, "Limits the maximum duration for automatic alert expiration, "+
|
|
"which is by default equal to 3 evaluation intervals of the parent group.")
|
|
resendDelay = flag.Duration("rule.resendDelay", 0, "Minimum amount of time to wait before resending an alert to notifier")
|
|
ruleUpdateEntriesLimit = flag.Int("rule.updateEntriesLimit", 20, "Defines the max number of rule's state updates stored in-memory. "+
|
|
"Rule's updates are available on rule's Details page and are used for debugging purposes. The number of stored updates can be overriden per rule via update_entries_limit param.")
|
|
|
|
externalURL = flag.String("external.url", "", "External URL is used as alert's source for sent alerts to the notifier")
|
|
externalAlertSource = flag.String("external.alert.source", "", `External Alert Source allows to override the Source link for alerts sent to AlertManager `+
|
|
`for cases where you want to build a custom link to Grafana, Prometheus or any other service. `+
|
|
`Supports templating - see https://docs.victoriametrics.com/vmalert.html#templating . `+
|
|
`For example, link to Grafana: -external.alert.source='explore?orgId=1&left=["now-1h","now","VictoriaMetrics",{"expr":{{$expr|jsonEscape|queryEscape}} },{"mode":"Metrics"},{"ui":[true,true,true,"none"]}]' . `+
|
|
`If empty 'vmalert/alert?group_id={{.GroupID}}&alert_id={{.AlertID}}' is used.`)
|
|
externalLabels = flagutil.NewArrayString("external.label", "Optional label in the form 'Name=value' to add to all generated recording rules and alerts. "+
|
|
"Pass multiple -label flags in order to add multiple label sets.")
|
|
|
|
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.")
|
|
remoteReadIgnoreRestoreErrors = flag.Bool("remoteRead.ignoreRestoreErrors", true, "Whether to ignore errors from remote storage when restoring alerts state on startup. DEPRECATED - this flag has no effect and will be removed in the next releases.")
|
|
|
|
disableAlertGroupLabel = flag.Bool("disableAlertgroupLabel", false, "Whether to disable adding group's Name as label to generated alerts and time series.")
|
|
|
|
dryRun = flag.Bool("dryRun", false, "Whether to check only config files without running vmalert. The rules file are validated. The -rule flag must be specified.")
|
|
)
|
|
|
|
var alertURLGeneratorFn notifier.AlertURLGenerator
|
|
|
|
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()
|
|
remoteread.InitSecretFlags()
|
|
remotewrite.InitSecretFlags()
|
|
datasource.InitSecretFlags()
|
|
buildinfo.Init()
|
|
logger.Init()
|
|
pushmetrics.Init()
|
|
|
|
if !*remoteReadIgnoreRestoreErrors {
|
|
logger.Warnf("flag `remoteRead.ignoreRestoreErrors` is deprecated and will be removed in next releases.")
|
|
}
|
|
|
|
err := templates.Load(*ruleTemplatesPath, true)
|
|
if err != nil {
|
|
logger.Fatalf("failed to parse %q: %s", *ruleTemplatesPath, err)
|
|
}
|
|
|
|
if *dryRun {
|
|
groups, err := config.Parse(*rulePath, notifier.ValidateTemplates, true)
|
|
if err != nil {
|
|
logger.Fatalf("failed to parse %q: %s", *rulePath, err)
|
|
}
|
|
if len(groups) == 0 {
|
|
logger.Fatalf("No rules for validation. Please specify path to file(s) with alerting and/or recording rules using `-rule` flag")
|
|
}
|
|
return
|
|
}
|
|
|
|
eu, err := getExternalURL(*externalURL, *httpListenAddr, httpserver.IsTLS())
|
|
if err != nil {
|
|
logger.Fatalf("failed to init `external.url`: %s", err)
|
|
}
|
|
|
|
alertURLGeneratorFn, err = getAlertURLGenerator(eu, *externalAlertSource, *validateTemplates)
|
|
if err != nil {
|
|
logger.Fatalf("failed to init `external.alert.source`: %s", err)
|
|
}
|
|
|
|
var validateTplFn config.ValidateTplFn
|
|
if *validateTemplates {
|
|
validateTplFn = notifier.ValidateTemplates
|
|
}
|
|
|
|
if *replayFrom != "" || *replayTo != "" {
|
|
rw, err := remotewrite.Init(context.Background())
|
|
if err != nil {
|
|
logger.Fatalf("failed to init remoteWrite: %s", err)
|
|
}
|
|
if rw == nil {
|
|
logger.Fatalf("remoteWrite.url can't be empty in replay mode")
|
|
}
|
|
groupsCfg, err := config.Parse(*rulePath, validateTplFn, *validateExpressions)
|
|
if err != nil {
|
|
logger.Fatalf("cannot parse configuration file: %s", err)
|
|
}
|
|
// prevent queries from caching and boundaries aligning
|
|
// when querying VictoriaMetrics datasource.
|
|
q, err := datasource.Init(url.Values{"nocache": {"1"}})
|
|
if err != nil {
|
|
logger.Fatalf("failed to init datasource: %s", err)
|
|
}
|
|
if err := replay(groupsCfg, q, rw); err != nil {
|
|
logger.Fatalf("replay failed: %s", err)
|
|
}
|
|
return
|
|
}
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
manager, err := newManager(ctx)
|
|
if err != nil {
|
|
logger.Fatalf("failed to init: %s", err)
|
|
}
|
|
logger.Infof("reading rules configuration file from %q", strings.Join(*rulePath, ";"))
|
|
groupsCfg, err := config.Parse(*rulePath, validateTplFn, *validateExpressions)
|
|
if err != nil {
|
|
logger.Fatalf("cannot parse configuration file: %s", err)
|
|
}
|
|
|
|
// Register SIGHUP handler for config re-read just before manager.start call.
|
|
// This guarantees that the config will be re-read if the signal arrives during manager.start call.
|
|
// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1240
|
|
sighupCh := procutil.NewSighupChan()
|
|
|
|
if err := manager.start(ctx, groupsCfg); err != nil {
|
|
logger.Fatalf("failed to start: %s", err)
|
|
}
|
|
|
|
go configReload(ctx, manager, groupsCfg, sighupCh)
|
|
|
|
rh := &requestHandler{m: manager}
|
|
go httpserver.Serve(*httpListenAddr, *useProxyProtocol, 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 newManager(ctx context.Context) (*manager, error) {
|
|
q, err := datasource.Init(nil)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to init datasource: %w", err)
|
|
}
|
|
|
|
labels := make(map[string]string)
|
|
for _, s := range *externalLabels {
|
|
if len(s) == 0 {
|
|
continue
|
|
}
|
|
n := strings.IndexByte(s, '=')
|
|
if n < 0 {
|
|
return nil, fmt.Errorf("missing '=' in `-label`. It must contain label in the form `Name=value`; got %q", s)
|
|
}
|
|
labels[s[:n]] = s[n+1:]
|
|
}
|
|
|
|
nts, err := notifier.Init(alertURLGeneratorFn, labels, *externalURL)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to init notifier: %w", err)
|
|
}
|
|
manager := &manager{
|
|
groups: make(map[uint64]*Group),
|
|
querierBuilder: q,
|
|
notifiers: nts,
|
|
labels: labels,
|
|
}
|
|
rw, err := remotewrite.Init(ctx)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to init remoteWrite: %w", err)
|
|
}
|
|
manager.rw = rw
|
|
|
|
rr, err := remoteread.Init()
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to init remoteRead: %w", err)
|
|
}
|
|
manager.rr = rr
|
|
|
|
return manager, nil
|
|
}
|
|
|
|
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 getAlertURLGenerator(externalURL *url.URL, externalAlertSource string, validateTemplate bool) (notifier.AlertURLGenerator, error) {
|
|
if externalAlertSource == "" {
|
|
return func(a notifier.Alert) string {
|
|
gID, aID := strconv.FormatUint(a.GroupID, 10), strconv.FormatUint(a.ID, 10)
|
|
return fmt.Sprintf("%s/vmalert/alert?%s=%s&%s=%s", externalURL, paramGroupID, gID, paramAlertID, aID)
|
|
}, nil
|
|
}
|
|
if validateTemplate {
|
|
if err := notifier.ValidateTemplates(map[string]string{
|
|
"tpl": externalAlertSource,
|
|
}); err != nil {
|
|
return nil, fmt.Errorf("error validating source template %s: %w", externalAlertSource, err)
|
|
}
|
|
}
|
|
m := map[string]string{
|
|
"tpl": externalAlertSource,
|
|
}
|
|
return func(alert notifier.Alert) string {
|
|
templated, err := alert.ExecTemplate(nil, alert.Labels, m)
|
|
if err != nil {
|
|
logger.Errorf("can not exec source template %s", err)
|
|
}
|
|
return fmt.Sprintf("%s/%s", externalURL, templated["tpl"])
|
|
}, nil
|
|
}
|
|
|
|
func usage() {
|
|
const s = `
|
|
vmalert processes alerts and recording rules.
|
|
|
|
See the docs at https://docs.victoriametrics.com/vmalert.html .
|
|
`
|
|
flagutil.Usage(s)
|
|
}
|
|
|
|
func configReload(ctx context.Context, m *manager, groupsCfg []config.Group, sighupCh <-chan os.Signal) {
|
|
var configCheckCh <-chan time.Time
|
|
checkInterval := *configCheckInterval
|
|
if checkInterval == 0 && *rulesCheckInterval > 0 {
|
|
logger.Warnf("flag `rule.configCheckInterval` is deprecated - use `configCheckInterval` instead")
|
|
checkInterval = *rulesCheckInterval
|
|
}
|
|
if checkInterval > 0 {
|
|
ticker := time.NewTicker(checkInterval)
|
|
configCheckCh = ticker.C
|
|
defer ticker.Stop()
|
|
}
|
|
|
|
var validateTplFn config.ValidateTplFn
|
|
if *validateTemplates {
|
|
validateTplFn = notifier.ValidateTemplates
|
|
}
|
|
|
|
// init reload metrics with positive values to improve alerting conditions
|
|
configSuccess.Set(1)
|
|
configTimestamp.Set(fasttime.UnixTimestamp())
|
|
for {
|
|
select {
|
|
case <-ctx.Done():
|
|
return
|
|
case <-sighupCh:
|
|
tmplMsg := ""
|
|
if len(*ruleTemplatesPath) > 0 {
|
|
tmplMsg = fmt.Sprintf("and templates %q ", *ruleTemplatesPath)
|
|
}
|
|
logger.Infof("SIGHUP received. Going to reload rules %q %s...", *rulePath, tmplMsg)
|
|
configReloads.Inc()
|
|
case <-configCheckCh:
|
|
}
|
|
if err := notifier.Reload(); err != nil {
|
|
configReloadErrors.Inc()
|
|
configSuccess.Set(0)
|
|
logger.Errorf("failed to reload notifier config: %s", err)
|
|
continue
|
|
}
|
|
err := templates.Load(*ruleTemplatesPath, false)
|
|
if err != nil {
|
|
configReloadErrors.Inc()
|
|
configSuccess.Set(0)
|
|
logger.Errorf("failed to load new templates: %s", err)
|
|
continue
|
|
}
|
|
newGroupsCfg, err := config.Parse(*rulePath, validateTplFn, *validateExpressions)
|
|
if err != nil {
|
|
configReloadErrors.Inc()
|
|
configSuccess.Set(0)
|
|
logger.Errorf("cannot parse configuration file: %s", err)
|
|
continue
|
|
}
|
|
if configsEqual(newGroupsCfg, groupsCfg) {
|
|
templates.Reload()
|
|
// set success to 1 since previous reload
|
|
// could have been unsuccessful
|
|
configSuccess.Set(1)
|
|
// config didn't change - skip it
|
|
continue
|
|
}
|
|
if err := m.update(ctx, newGroupsCfg, false); err != nil {
|
|
configReloadErrors.Inc()
|
|
configSuccess.Set(0)
|
|
logger.Errorf("error while reloading rules: %s", err)
|
|
continue
|
|
}
|
|
templates.Reload()
|
|
groupsCfg = newGroupsCfg
|
|
configSuccess.Set(1)
|
|
configTimestamp.Set(fasttime.UnixTimestamp())
|
|
logger.Infof("Rules reloaded successfully from %q", *rulePath)
|
|
}
|
|
}
|
|
|
|
func configsEqual(a, b []config.Group) bool {
|
|
if len(a) != len(b) {
|
|
return false
|
|
}
|
|
for i := range a {
|
|
if a[i].Checksum != b[i].Checksum {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|