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main.go
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package main
import (
"context"
"crypto/tls"
"embed"
"fmt"
"html/template"
"io"
"io/fs"
"math"
"net/http"
"net/url"
"os"
"sort"
"strconv"
"strings"
"sync"
"syscall"
"time"
"github.com/alecthomas/kong"
"github.com/bufbuild/connect-go"
"github.com/dgraph-io/ristretto"
"github.com/go-chi/chi/v5"
"github.com/go-chi/cors"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
"github.com/oklog/run"
connectprometheus "github.com/polarsignals/connect-go-prometheus"
"github.com/prometheus/client_golang/api"
prometheusapiv1 "github.com/prometheus/client_golang/api/prometheus/v1"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/collectors"
"github.com/prometheus/client_golang/prometheus/promhttp"
promconfig "github.com/prometheus/common/config"
"github.com/prometheus/common/model"
"github.com/prometheus/prometheus/model/labels"
"github.com/prometheus/prometheus/promql/parser"
"golang.org/x/net/http2"
"golang.org/x/net/http2/h2c"
"google.golang.org/protobuf/types/known/durationpb"
"github.com/pyrra-dev/pyrra/mimir"
objectivesv1alpha1 "github.com/pyrra-dev/pyrra/proto/objectives/v1alpha1"
"github.com/pyrra-dev/pyrra/proto/objectives/v1alpha1/objectivesv1alpha1connect"
"github.com/pyrra-dev/pyrra/proto/prometheus/v1/prometheusv1connect"
"github.com/pyrra-dev/pyrra/slo"
)
//go:embed ui/build
var ui embed.FS
var CLI struct {
LoggerConfig
API struct {
PrometheusURL *url.URL `default:"http://localhost:9090" help:"The URL to the Prometheus to query."`
PrometheusExternalURL *url.URL `help:"The URL for the UI to redirect users to when opening Prometheus. If empty the same as prometheus.url"`
APIURL *url.URL `name:"api-url" default:"http://localhost:9444" help:"The URL to the API service like a Kubernetes Operator."`
RoutePrefix string `default:"" help:"The route prefix Pyrra uses. If run behind a proxy you can change it to something like /pyrra here."`
UIRoutePrefix string `default:"" help:"The route prefix Pyrra's UI uses. This is helpful for when the prefix is stripped by a proxy but still runs on /pyrra. Defaults to --route-prefix"`
PrometheusBearerTokenPath string `default:"" help:"Bearer token path"`
PrometheusBasicAuthUsername string `default:"" help:"The HTTP basic authentication username"`
PrometheusBasicAuthPassword promconfig.Secret `default:"" help:"The HTTP basic authentication password"`
TLSCertFile string `default:"" help:"File containing the default x509 Certificate for HTTPS."`
TLSPrivateKeyFile string `default:"" help:"File containing the default x509 private key matching --tls-cert-file."`
TLSClientCAFile string `default:"" help:"File containing the CA certificate for the client"`
MimirTenantIds []string `default:"" help:"Mimir tenant IDs to query if multi-tenancy is enabled."`
} `cmd:"" help:"Runs Pyrra's API and UI."`
Filesystem struct {
ConfigFiles string `default:"/etc/pyrra/*.yaml" help:"The folder where Pyrra finds the config files to use. Any non yaml files will be ignored."`
PrometheusURL *url.URL `default:"http://localhost:9090" help:"The URL to the Prometheus to query."`
PrometheusFolder string `default:"/etc/prometheus/pyrra/" help:"The folder where Pyrra writes the generates Prometheus rules and alerts."`
GenericRules bool `default:"false" help:"Enabled generic recording rules generation to make it easier for tools like Grafana."`
} `cmd:"" help:"Runs Pyrra's filesystem operator and backend for the API."`
Kubernetes struct {
MetricsAddr string `default:":8080" help:"The address the metric endpoint binds to."`
ConfigMapMode bool `default:"false" help:"If the generated recording rules should instead be saved to config maps in the default Prometheus format."`
GenericRules bool `default:"false" help:"Enabled generic recording rules generation to make it easier for tools like Grafana."`
DisableWebhooks bool `default:"true" env:"DISABLE_WEBHOOKS" help:"Disable webhooks so the controller doesn't try to read certificates"`
TLSCertFile string `default:"" help:"File containing the default x509 Certificate for HTTPS."`
TLSPrivateKeyFile string `default:"" help:"File containing the default x509 private key matching --tls-cert-file."`
MimirURL *url.URL `default:"" help:"The URL to the Mimir API. If specified provisions rules via Mimir instead of Prometheus"`
MimirPrometheusPrefix string `default:"prometheus" help:"The prefix for the Prometheus API in Mimir"`
MimirBasicAuthUsername string `default:"" help:"The HTTP basic authentication username"`
MimirBasicAuthPassword string `default:"" help:"The HTTP basic authentication password"`
MimirWriteAlertingRules bool `default:"false" help:"If alerting rules should be provisioned to the Mimir Ruler."`
} `cmd:"" help:"Runs Pyrra's Kubernetes operator and backend for the API."`
Generate struct {
ConfigFiles string `default:"/etc/pyrra/*.yaml" help:"The folder where Pyrra finds the config files to use."`
PrometheusFolder string `default:"/etc/prometheus/pyrra/" help:"The folder where Pyrra writes the generated Prometheus rules and alerts."`
GenericRules bool `default:"false" help:"Enabled generic recording rules generation to make it easier for tools like Grafana."`
OperatorRule bool `default:"false" help:"Generate rule files as prometheus-operator PrometheusRule: https://prometheus-operator.dev/docs/operator/api/#monitoring.coreos.com/v1.PrometheusRule."`
} `cmd:"" help:"Read SLO config files and rewrites them as Prometheus rules and alerts."`
}
func main() {
ctx := kong.Parse(&CLI)
logger := configureLogger(CLI.LoggerConfig)
reg := prometheus.NewRegistry()
reg.MustRegister(
collectors.NewBuildInfoCollector(),
collectors.NewGoCollector(),
collectors.NewProcessCollector(collectors.ProcessCollectorOpts{}),
)
var prometheusURL *url.URL
switch ctx.Command() {
case "api":
prometheusURL = CLI.API.PrometheusURL
case "filesystem":
prometheusURL = CLI.Filesystem.PrometheusURL
default:
prometheusURL, _ = url.Parse("http://localhost:9090")
}
clientConfig := promconfig.HTTPClientConfig{}
if CLI.API.PrometheusBasicAuthUsername != "" && CLI.API.PrometheusBasicAuthPassword != "" {
clientConfig.BasicAuth = &promconfig.BasicAuth{
Username: CLI.API.PrometheusBasicAuthUsername,
Password: CLI.API.PrometheusBasicAuthPassword,
}
}
if CLI.API.PrometheusBearerTokenPath != "" {
clientConfig.BearerTokenFile = CLI.API.PrometheusBearerTokenPath
}
if CLI.API.TLSClientCAFile != "" {
clientConfig.TLSConfig = promconfig.TLSConfig{CAFile: CLI.API.TLSClientCAFile}
}
if len(CLI.API.MimirTenantIds) > 0 {
mimirHeaderValue := strings.Join(CLI.API.MimirTenantIds, "|")
clientConfig.HTTPHeaders = &promconfig.Headers{
Headers: map[string]promconfig.Header{
"X-Scope-OrgID": {
Values: []string{mimirHeaderValue},
},
},
}
}
roundTripper, err := promconfig.NewRoundTripperFromConfig(clientConfig, "prometheus")
if err != nil {
level.Error(logger).Log("msg", "failed to create API client round tripper", "err", err)
os.Exit(1)
}
client, err := api.NewClient(api.Config{
Address: prometheusURL.String(),
RoundTripper: roundTripper,
})
if err != nil {
level.Error(logger).Log("msg", "failed to create API client", "err", err)
os.Exit(1)
}
// Wrap client to add extra headers for Thanos.
client = newThanosClient(client)
level.Info(logger).Log("msg", "using Prometheus", "url", prometheusURL.String())
if CLI.API.PrometheusExternalURL == nil {
CLI.API.PrometheusExternalURL = prometheusURL
}
// Mimir Client
var mimirClient *mimir.Client
// if a MimirURL has been specified, provision rules via Mimir instead of Prometheus
if CLI.Kubernetes.MimirURL.String() != "" {
level.Info(logger).Log("msg", "using Mimir", "url", CLI.Kubernetes.MimirURL.String())
mimirConfig := mimir.Config{
Address: CLI.Kubernetes.MimirURL.String(),
PrometheusPrefix: CLI.Kubernetes.MimirPrometheusPrefix,
BasicAuthUsername: CLI.Kubernetes.MimirBasicAuthUsername,
BasicAuthPassword: CLI.Kubernetes.MimirBasicAuthPassword,
}
mimirClient, err = mimir.NewClient(mimirConfig)
if err != nil {
level.Error(logger).Log("msg", "failed to create Mimirclient", "err", err)
os.Exit(1)
}
err := mimirClient.Ready(context.TODO())
if err != nil {
level.Error(logger).Log("msg", "failed to connect to Mimir", "err", err)
os.Exit(1)
}
}
var code int
switch ctx.Command() {
case "api":
code = cmdAPI(
logger,
reg,
client,
CLI.API.PrometheusExternalURL,
CLI.API.APIURL,
CLI.API.RoutePrefix,
CLI.API.UIRoutePrefix,
CLI.API.TLSCertFile,
CLI.API.TLSPrivateKeyFile,
)
case "filesystem":
code = cmdFilesystem(
logger,
reg,
client,
CLI.Filesystem.ConfigFiles,
CLI.Filesystem.PrometheusFolder,
CLI.Filesystem.GenericRules,
)
case "kubernetes":
code = cmdKubernetes(
logger,
CLI.Kubernetes.MetricsAddr,
CLI.Kubernetes.ConfigMapMode,
CLI.Kubernetes.GenericRules,
CLI.Kubernetes.DisableWebhooks,
CLI.Kubernetes.TLSCertFile,
CLI.Kubernetes.TLSPrivateKeyFile,
mimirClient,
CLI.Kubernetes.MimirWriteAlertingRules,
)
case "generate":
code = cmdGenerate(
logger,
CLI.Generate.ConfigFiles,
CLI.Generate.PrometheusFolder,
CLI.Generate.GenericRules,
CLI.Generate.OperatorRule,
)
}
os.Exit(code)
}
func cmdAPI(
logger log.Logger,
reg *prometheus.Registry,
promClient api.Client,
prometheusExternal, apiURL *url.URL,
routePrefix, uiRoutePrefix string,
tlsCertFile, tlsPrivateKeyFile string,
) int {
build, err := fs.Sub(ui, "ui/build")
if err != nil {
level.Error(logger).Log("msg", "failed to read UI build files", "err", err)
return 1
}
// RoutePrefix must always be at least '/'.
routePrefix = "/" + strings.Trim(routePrefix, "/")
if uiRoutePrefix == "" {
uiRoutePrefix = routePrefix
} else {
uiRoutePrefix = "/" + strings.Trim(uiRoutePrefix, "/")
}
level.Info(logger).Log("msg", "UI redirect to Prometheus", "url", prometheusExternal.String())
level.Info(logger).Log("msg", "using API at", "url", apiURL.String())
level.Info(logger).Log("msg", "using route prefix", "prefix", routePrefix)
cache, err := ristretto.NewCache(&ristretto.Config{
NumCounters: 1e7, // number of keys to track frequency of (10M).
MaxCost: 1 << 30, // maximum cost of cache (1GB).
BufferItems: 64, // number of keys per Get buffer.
})
if err != nil {
level.Error(logger).Log("msg", "failed to create cache", "err", err)
return 1
}
defer cache.Close()
promAPI := &promCache{
api: &promLogger{
api: prometheusapiv1.NewAPI(promClient),
logger: logger,
},
cache: cache,
}
tmpl, err := template.ParseFS(build, "index.html")
if err != nil {
level.Error(logger).Log("msg", "failed to parse HTML template", "err", err)
return 1
}
r := chi.NewRouter()
r.Use(cors.Handler(cors.Options{
AllowedHeaders: []string{
"Content-Type",
"Connect-Protocol-Version",
},
})) // TODO: Disable by default
prometheusInterceptor := connectprometheus.NewInterceptor(reg)
r.Route(routePrefix, func(r chi.Router) {
clientConfig := promconfig.HTTPClientConfig{
TLSConfig: promconfig.TLSConfig{
InsecureSkipVerify: true,
},
}
roundTripper, err := promconfig.NewRoundTripperFromConfig(clientConfig, "api")
if err != nil {
level.Error(logger).Log("msg", "failed to create API client round tripper", "err", err)
os.Exit(1)
}
client := &http.Client{
Transport: roundTripper,
}
objectiveService := &objectiveServer{
logger: log.WithPrefix(logger, "service", "objective"),
promAPI: promAPI,
client: newBackendClientCache(
objectivesv1alpha1connect.NewObjectiveBackendServiceClient(
client,
apiURL.String(),
connect.WithInterceptors(prometheusInterceptor),
),
),
}
objectivePath, objectiveHandler := objectivesv1alpha1connect.NewObjectiveServiceHandler(
objectiveService,
connect.WithInterceptors(prometheusInterceptor),
)
prometheusService := &prometheusServer{
logger: log.WithPrefix(logger, "service", "prometheus"),
promAPI: promAPI,
}
prometheusPath, prometheusHandler := prometheusv1connect.NewPrometheusServiceHandler(prometheusService)
if routePrefix != "/" {
r.Mount(objectivePath, http.StripPrefix(routePrefix, objectiveHandler))
r.Mount(prometheusPath, http.StripPrefix(routePrefix, prometheusHandler))
} else {
r.Mount(objectivePath, objectiveHandler)
r.Mount(prometheusPath, prometheusHandler)
}
r.Handle("/metrics", promhttp.HandlerFor(reg, promhttp.HandlerOpts{}))
r.Get("/objectives", func(w http.ResponseWriter, _ *http.Request) {
err := tmpl.Execute(w, struct {
PrometheusURL string
PathPrefix string
APIBasepath string
}{
PrometheusURL: prometheusExternal.String(),
PathPrefix: uiRoutePrefix,
APIBasepath: uiRoutePrefix,
})
if err != nil {
level.Warn(logger).Log("msg", "failed to populate HTML template", "err", err)
}
})
r.Handle("/*", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// Trim trailing slash to not care about matching e.g. /pyrra and /pyrra/
if r.URL.Path == "/" || strings.TrimSuffix(r.URL.Path, "/") == routePrefix {
err := tmpl.Execute(w, struct {
PrometheusURL string
PathPrefix string
APIBasepath string
}{
PrometheusURL: prometheusExternal.String(),
PathPrefix: uiRoutePrefix,
APIBasepath: uiRoutePrefix,
})
if err != nil {
level.Warn(logger).Log("msg", "failed to populate HTML template", "err", err)
}
return
}
http.StripPrefix(
routePrefix,
http.FileServer(http.FS(build)),
).ServeHTTP(w, r)
}))
})
if routePrefix != "/" {
// Redirect /pyrra to /pyrra/ for the UI to work properly.
r.HandleFunc(strings.TrimSuffix(routePrefix, "/"), func(w http.ResponseWriter, r *http.Request) {
http.Redirect(w, r, routePrefix+"/", http.StatusPermanentRedirect)
})
}
var (
gr run.Group
ctx = context.Background()
)
gr.Add(run.SignalHandler(ctx, os.Interrupt, syscall.SIGTERM))
{
httpServer := &http.Server{
Addr: ":9099",
Handler: h2c.NewHandler(r, &http2.Server{}),
TLSConfig: &tls.Config{},
}
gr.Add(
func() error {
if tlsCertFile != "" && tlsPrivateKeyFile != "" {
level.Info(logger).Log("msg", "serving using TLS", "cert", tlsCertFile, "key", tlsPrivateKeyFile)
return httpServer.ListenAndServeTLS(tlsCertFile, tlsPrivateKeyFile)
}
return httpServer.ListenAndServe()
},
func(error) {
shutdownCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
defer cancel()
_ = httpServer.Shutdown(shutdownCtx)
},
)
}
if err := gr.Run(); err != nil {
if _, ok := err.(run.SignalError); ok {
level.Info(logger).Log("msg", "terminated HTTP server", "reason", err)
return 0
}
level.Error(logger).Log("msg", "failed to run HTTP server", "err", err)
return 2
}
return 0
}
func newBackendClientCache(client objectivesv1alpha1connect.ObjectiveBackendServiceClient) objectivesv1alpha1connect.ObjectiveBackendServiceClient {
cache, err := ristretto.NewCache(&ristretto.Config{
NumCounters: 100,
MaxCost: 10 * 1000, // 10 seconds
BufferItems: 64,
})
if err != nil {
panic(err)
}
return &backendClientCache{client: client, cache: cache}
}
type backendClientCache struct {
client objectivesv1alpha1connect.ObjectiveBackendServiceClient
cache *ristretto.Cache
}
// List calls the backend service and caches the result for 10 seconds if the request is successful.
func (b *backendClientCache) List(ctx context.Context, req *connect.Request[objectivesv1alpha1.ListRequest]) (*connect.Response[objectivesv1alpha1.ListResponse], error) {
key := req.Msg.Expr + req.Msg.Grouping
list, found := b.cache.Get(key)
if found {
return connect.NewResponse(list.(*objectivesv1alpha1.ListResponse)), nil
}
start := time.Now()
resp, err := b.client.List(ctx, req)
if err != nil {
return nil, err
}
_ = b.cache.SetWithTTL(key, resp.Msg, time.Since(start).Milliseconds(), 10*time.Second)
return resp, nil
}
func newThanosClient(client api.Client) api.Client {
return &thanosClient{client: client}
}
// thanosClient wraps the Prometheus Client to inject some headers to disable partial responses
// and enables querying for downsampled data.
type thanosClient struct {
client api.Client
}
func (c *thanosClient) URL(ep string, args map[string]string) *url.URL {
return c.client.URL(ep, args)
}
func (c *thanosClient) Do(ctx context.Context, r *http.Request) (*http.Response, []byte, error) {
if r.Body == nil {
return c.client.Do(ctx, r)
}
body, err := io.ReadAll(r.Body)
if err != nil {
return nil, nil, fmt.Errorf("reading body: %w", err)
}
query, err := url.ParseQuery(string(body))
if err != nil {
return nil, nil, fmt.Errorf("parsing body: %w", err)
}
// We don't want partial responses, especially not when calculating error budgets.
query.Set("partial_response", "false")
r.ContentLength += 23
if strings.HasSuffix(r.URL.Path, "/api/v1/query_range") {
start, err := strconv.ParseFloat(query.Get("start"), 64)
if err != nil {
return nil, nil, fmt.Errorf("parsing start: %w", err)
}
end, err := strconv.ParseFloat(query.Get("end"), 64)
if err != nil {
return nil, nil, fmt.Errorf("parsing end: %w", err)
}
if end-start >= 28*24*60*60 { // request 1h downsamples when range > 28d
query.Set("max_source_resolution", "1h")
r.ContentLength += 25
} else if end-start >= 7*24*60*60 { // request 5m downsamples when range > 1w
query.Set("max_source_resolution", "5m")
r.ContentLength += 25
}
}
encoded := query.Encode()
r.Body = io.NopCloser(strings.NewReader(encoded))
return c.client.Do(ctx, r)
}
type prometheusAPI interface {
// Query performs a query for the given time.
Query(ctx context.Context, query string, ts time.Time, opts ...prometheusapiv1.Option) (model.Value, prometheusapiv1.Warnings, error)
// QueryRange performs a query for the given range.
QueryRange(ctx context.Context, query string, r prometheusapiv1.Range, opts ...prometheusapiv1.Option) (model.Value, prometheusapiv1.Warnings, error)
}
type promLogger struct {
api prometheusAPI
logger log.Logger
}
func (l *promLogger) Query(ctx context.Context, query string, ts time.Time, opts ...prometheusapiv1.Option) (model.Value, prometheusapiv1.Warnings, error) {
level.Debug(l.logger).Log(
"msg", "running instant query",
"query", query,
"ts", ts,
)
return l.api.Query(ctx, query, ts, opts...)
}
func (l *promLogger) QueryRange(ctx context.Context, query string, r prometheusapiv1.Range, opts ...prometheusapiv1.Option) (model.Value, prometheusapiv1.Warnings, error) {
level.Debug(l.logger).Log(
"msg", "running range query",
"query", query,
"start", r.Start,
"end", r.End,
)
return l.api.QueryRange(ctx, query, r, opts...)
}
type promCache struct {
api prometheusAPI
cache *ristretto.Cache
}
type promCacheKeyType string
const promCacheKey promCacheKeyType = "promCache"
func contextSetPromCache(ctx context.Context, t time.Duration) context.Context {
return context.WithValue(ctx, promCacheKey, t)
}
func contextGetPromCache(ctx context.Context) time.Duration {
t, ok := ctx.Value(promCacheKey).(time.Duration)
if ok {
return t
}
return 0
}
func (p *promCache) Query(ctx context.Context, query string, ts time.Time) (model.Value, prometheusapiv1.Warnings, error) {
if value, exists := p.cache.Get(query); exists {
return value.(model.Value), nil, nil
}
start := time.Now()
value, warnings, err := p.api.Query(ctx, query, ts)
duration := time.Since(start)
if err != nil {
return nil, warnings, fmt.Errorf("prometheus query: %w", err)
}
if len(warnings) > 0 {
return value, warnings, nil
}
cacheDuration := contextGetPromCache(ctx)
if cacheDuration > 0 {
if v, ok := value.(model.Vector); ok {
if len(v) > 0 {
_ = p.cache.SetWithTTL(query, value, duration.Milliseconds(), cacheDuration)
}
}
}
return value, warnings, nil
}
func (p *promCache) QueryRange(ctx context.Context, query string, r prometheusapiv1.Range) (model.Value, prometheusapiv1.Warnings, error) {
// Get the full time range of this query from start to end.
// We round by 10s to adjust for small imperfections to increase cache hits.
timeRange := r.End.Sub(r.Start).Round(10 * time.Second)
cacheKey := fmt.Sprintf("%d;%s", timeRange.Milliseconds(), query)
if value, exists := p.cache.Get(cacheKey); exists {
return value.(model.Value), nil, nil
}
start := time.Now()
value, warnings, err := p.api.QueryRange(ctx, query, r)
duration := time.Since(start)
if err != nil {
return nil, warnings, fmt.Errorf("prometheus query range: %w", err)
}
if len(warnings) > 0 {
return value, warnings, nil
}
cacheDuration := contextGetPromCache(ctx)
if cacheDuration > 0 {
if m, ok := value.(model.Matrix); ok {
if len(m) > 0 {
_ = p.cache.SetWithTTL(cacheKey, value, duration.Milliseconds(), cacheDuration)
}
}
}
return value, warnings, nil
}
type objectiveServer struct {
logger log.Logger
promAPI *promCache
client objectivesv1alpha1connect.ObjectiveBackendServiceClient
}
func (s *objectiveServer) getObjective(ctx context.Context, expr string) (slo.Objective, error) {
resp, err := s.client.List(ctx, connect.NewRequest(&objectivesv1alpha1.ListRequest{
Expr: expr,
}))
if err != nil {
return slo.Objective{}, err
}
if len(resp.Msg.Objectives) != 1 {
return slo.Objective{}, connect.NewError(connect.CodeAborted, fmt.Errorf("expr matches more than one SLO, it matches: %d", len(resp.Msg.Objectives)))
}
return objectivesv1alpha1.ToInternal(resp.Msg.Objectives[0]), nil
}
func (s *objectiveServer) List(ctx context.Context, req *connect.Request[objectivesv1alpha1.ListRequest]) (*connect.Response[objectivesv1alpha1.ListResponse], error) {
if expr := req.Msg.Expr; expr != "" {
if _, err := parser.ParseMetricSelector(expr); err != nil {
return nil, connect.NewError(connect.CodeFailedPrecondition, fmt.Errorf("failed to parse expr: %w", err))
}
}
resp, err := s.client.List(ctx, connect.NewRequest(&objectivesv1alpha1.ListRequest{
Expr: req.Msg.Expr,
}))
if err != nil {
return nil, err
}
groupingMatchers := map[string]*labels.Matcher{}
if req.Msg.Grouping != "" {
ms, err := parser.ParseMetricSelector(req.Msg.Grouping)
if err != nil {
return nil, connect.NewError(connect.CodeInvalidArgument, err)
}
for _, m := range ms {
groupingMatchers[m.Name] = m
}
}
for _, o := range resp.Msg.Objectives {
oi := objectivesv1alpha1.ToInternal(o)
// If specific grouping was selected we need to merge the label matchers for the queries.
if len(groupingMatchers) > 0 {
switch oi.IndicatorType() {
case slo.Ratio:
groupingMatchersErrors := make(map[string]*labels.Matcher, len(groupingMatchers))
groupingMatchersTotal := make(map[string]*labels.Matcher, len(groupingMatchers))
for _, matcher := range groupingMatchers {
// We need to copy the matchers to avoid modifying the original later on.
groupingMatchersErrors[matcher.Name] = &labels.Matcher{Type: matcher.Type, Name: matcher.Name, Value: matcher.Value}
groupingMatchersTotal[matcher.Name] = &labels.Matcher{Type: matcher.Type, Name: matcher.Name, Value: matcher.Value}
}
for _, m := range oi.Indicator.Ratio.Errors.LabelMatchers {
if rm, replace := groupingMatchers[m.Name]; replace {
m.Type = rm.Type
m.Value = rm.Value
delete(groupingMatchersErrors, m.Name)
}
}
for _, m := range oi.Indicator.Ratio.Total.LabelMatchers {
if rm, replace := groupingMatchers[m.Name]; replace {
m.Type = rm.Type
m.Value = rm.Value
delete(groupingMatchersTotal, m.Name)
}
}
// Now add the remaining matchers we didn't find before.
for _, m := range groupingMatchersErrors {
oi.Indicator.Ratio.Errors.LabelMatchers = append(oi.Indicator.Ratio.Errors.LabelMatchers, m)
}
for _, m := range groupingMatchersTotal {
oi.Indicator.Ratio.Total.LabelMatchers = append(oi.Indicator.Ratio.Total.LabelMatchers, m)
}
case slo.Latency:
groupingMatchersSuccess := make(map[string]*labels.Matcher, len(groupingMatchers))
groupingMatchersTotal := make(map[string]*labels.Matcher, len(groupingMatchers))
for _, matcher := range groupingMatchers {
// We need to copy the matchers to avoid modifying the original later on.
groupingMatchersSuccess[matcher.Name] = &labels.Matcher{Type: matcher.Type, Name: matcher.Name, Value: matcher.Value}
groupingMatchersTotal[matcher.Name] = &labels.Matcher{Type: matcher.Type, Name: matcher.Name, Value: matcher.Value}
}
for _, m := range oi.Indicator.Latency.Success.LabelMatchers {
if rm, replace := groupingMatchers[m.Name]; replace {
m.Type = rm.Type
m.Value = rm.Value
delete(groupingMatchersSuccess, m.Name)
}
}
for _, m := range oi.Indicator.Latency.Total.LabelMatchers {
if rm, replace := groupingMatchers[m.Name]; replace {
m.Type = rm.Type
m.Value = rm.Value
delete(groupingMatchersTotal, m.Name)
}
}
// Now add the remaining matchers we didn't find before.
for _, m := range groupingMatchersSuccess {
oi.Indicator.Latency.Success.LabelMatchers = append(oi.Indicator.Latency.Success.LabelMatchers, m)
}
for _, m := range groupingMatchersTotal {
oi.Indicator.Latency.Total.LabelMatchers = append(oi.Indicator.Latency.Total.LabelMatchers, m)
}
case slo.LatencyNative:
for _, m := range oi.Indicator.LatencyNative.Total.LabelMatchers {
if rm, replace := groupingMatchers[m.Name]; replace {
m.Type = rm.Type
m.Value = rm.Value
delete(groupingMatchers, m.Name)
}
}
for _, m := range groupingMatchers {
oi.Indicator.LatencyNative.Total.LabelMatchers = append(oi.Indicator.LatencyNative.Total.LabelMatchers, m)
}
case slo.BoolGauge:
for _, m := range oi.Indicator.BoolGauge.LabelMatchers {
if rm, replace := groupingMatchers[m.Name]; replace {
m.Type = rm.Type
m.Value = rm.Value
delete(groupingMatchers, m.Name)
}
}
for _, m := range groupingMatchers {
oi.Indicator.BoolGauge.LabelMatchers = append(oi.Indicator.BoolGauge.LabelMatchers, m)
}
}
}
o.Queries = &objectivesv1alpha1.Queries{
CountTotal: oi.QueryTotal(oi.Window),
CountErrors: oi.QueryErrors(oi.Window),
GraphErrorBudget: oi.QueryErrorBudget(),
GraphRequests: oi.RequestRange(time.Second),
GraphErrors: oi.ErrorsRange(time.Second),
}
}
return connect.NewResponse(&objectivesv1alpha1.ListResponse{
Objectives: resp.Msg.Objectives,
}), nil
}
func (s *objectiveServer) GetStatus(ctx context.Context, req *connect.Request[objectivesv1alpha1.GetStatusRequest]) (*connect.Response[objectivesv1alpha1.GetStatusResponse], error) {
objective, err := s.getObjective(ctx, req.Msg.Expr)
if err != nil {
return nil, err
}
// Merge grouping into objective's query
if req.Msg.Grouping != "" {
groupingMatchers, err := parser.ParseMetricSelector(req.Msg.Grouping)
if err != nil {
return nil, connect.NewError(connect.CodeInvalidArgument, err)
}
if objective.Indicator.Ratio != nil {
for _, m := range groupingMatchers {
objective.Indicator.Ratio.Errors.LabelMatchers = append(objective.Indicator.Ratio.Errors.LabelMatchers, m)
objective.Indicator.Ratio.Total.LabelMatchers = append(objective.Indicator.Ratio.Total.LabelMatchers, m)
}
}
if objective.Indicator.Latency != nil {
for _, m := range groupingMatchers {
objective.Indicator.Latency.Success.LabelMatchers = append(objective.Indicator.Latency.Success.LabelMatchers, m)
objective.Indicator.Latency.Total.LabelMatchers = append(objective.Indicator.Latency.Total.LabelMatchers, m)
}
}
if objective.Indicator.BoolGauge != nil {
objective.Indicator.BoolGauge.LabelMatchers = append(objective.Indicator.BoolGauge.LabelMatchers, groupingMatchers...)
}
}
ts := time.Now()
if req.Msg.Time != nil {
ts = req.Msg.Time.AsTime()
}
queryTotal := objective.QueryTotal(objective.Window)
value, _, err := s.promAPI.Query(contextSetPromCache(ctx, 15*time.Second), queryTotal, ts)
if err != nil {
level.Warn(s.logger).Log("msg", "failed to query total", "query", queryTotal, "err", err)
return nil, connect.NewError(connect.CodeInternal, err)
}
statuses := map[model.Fingerprint]*objectivesv1alpha1.ObjectiveStatus{}
for _, v := range value.(model.Vector) {
ls := make(map[string]string)
for k, v := range v.Metric {
ls[string(k)] = string(v)
}
statuses[v.Metric.Fingerprint()] = &objectivesv1alpha1.ObjectiveStatus{
Labels: ls,
Availability: &objectivesv1alpha1.Availability{
Percentage: 1,
Total: float64(v.Value),
},
}
}
queryErrors := objective.QueryErrors(objective.Window)
value, _, err = s.promAPI.Query(contextSetPromCache(ctx, 15*time.Second), queryErrors, ts)
if err != nil {
level.Warn(s.logger).Log("msg", "failed to query errors", "query", queryErrors, "err", err)
return nil, connect.NewError(connect.CodeInternal, err)
}
for _, v := range value.(model.Vector) {
if s, exists := statuses[v.Metric.Fingerprint()]; exists {
s.Availability.Errors = float64(v.Value)
s.Availability.Percentage = 1 - (s.Availability.Errors / s.Availability.Total)
} else {
objectiveLabels := make(map[string]string)
for k, v := range v.Metric {
objectiveLabels[string(k)] = string(v)
}
statuses[v.Metric.Fingerprint()] = &objectivesv1alpha1.ObjectiveStatus{
Labels: objectiveLabels,
Availability: &objectivesv1alpha1.Availability{
Percentage: 1 - (s.Availability.Errors / s.Availability.Total),
Total: float64(v.Value),
},
}
}
}
statusSlice := make([]*objectivesv1alpha1.ObjectiveStatus, 0, len(statuses))
for _, s := range statuses {
s.Budget = &objectivesv1alpha1.Budget{}
s.Budget.Total = 1 - objective.Target
s.Budget.Remaining = (s.Budget.Total - (s.Availability.Errors / s.Availability.Total)) / s.Budget.Total
s.Budget.Max = s.Budget.Total * s.Availability.Total
// If this objective has no requests, we'll skip showing it too
if s.Availability.Total == 0 {
continue
}
if math.IsNaN(s.Availability.Percentage) {
s.Availability.Percentage = 1
}
if math.IsNaN(s.Budget.Remaining) {
s.Budget.Remaining = 1
}
statusSlice = append(statusSlice, s)
}
return connect.NewResponse(&objectivesv1alpha1.GetStatusResponse{
Status: statusSlice,
}), nil
}
func (s *objectiveServer) GraphErrorBudget(ctx context.Context, req *connect.Request[objectivesv1alpha1.GraphErrorBudgetRequest]) (*connect.Response[objectivesv1alpha1.GraphErrorBudgetResponse], error) {
objective, err := s.getObjective(ctx, req.Msg.Expr)
if err != nil {
return nil, err
}
if req.Msg.Grouping != "" && req.Msg.Grouping != "{}" {
groupingMatchers, err := parser.ParseMetricSelector(req.Msg.Grouping)
if err != nil {
return nil, connect.NewError(connect.CodeFailedPrecondition, fmt.Errorf("failed parsing alerts metric: %w", err))
}
if ratio := objective.Indicator.Ratio; ratio != nil {
groupings := map[string]struct{}{}
for _, g := range ratio.Grouping {
groupings[g] = struct{}{}
}
for _, m := range groupingMatchers {
objective.Indicator.Ratio.Errors.LabelMatchers = append(objective.Indicator.Ratio.Errors.LabelMatchers, m)
objective.Indicator.Ratio.Total.LabelMatchers = append(objective.Indicator.Ratio.Total.LabelMatchers, m)
delete(groupings, m.Name)
}
objective.Indicator.Ratio.Grouping = []string{}
for g := range groupings {
objective.Indicator.Ratio.Grouping = append(objective.Indicator.Ratio.Grouping, g)
}
}
if objective.Indicator.Latency != nil {
groupings := map[string]struct{}{}
for _, g := range objective.Indicator.Ratio.Grouping {
groupings[g] = struct{}{}
}
for _, m := range groupingMatchers {
objective.Indicator.Latency.Success.LabelMatchers = append(objective.Indicator.Latency.Success.LabelMatchers, m)
objective.Indicator.Latency.Total.LabelMatchers = append(objective.Indicator.Latency.Total.LabelMatchers, m)
delete(groupings, m.Name)
}
objective.Indicator.Latency.Grouping = []string{}
for g := range groupings {
objective.Indicator.Latency.Grouping = append(objective.Indicator.Latency.Grouping, g)
}
}
if objective.Indicator.BoolGauge != nil {
groupings := map[string]struct{}{}
for _, g := range objective.Indicator.BoolGauge.Grouping {
groupings[g] = struct{}{}
}
for _, m := range groupingMatchers {
objective.Indicator.BoolGauge.LabelMatchers = append(objective.Indicator.BoolGauge.LabelMatchers, m)
delete(groupings, m.Name)
}
objective.Indicator.BoolGauge.Grouping = []string{}
for g := range groupings {
objective.Indicator.BoolGauge.Grouping = append(objective.Indicator.BoolGauge.Grouping, g)
}
}
}
if objective.Indicator.LatencyNative != nil && objective.Indicator.Ratio.Total.Name != "" {
return nil, connect.NewError(connect.CodeInternal, fmt.Errorf("unimplemented"))
}
end := time.Now()
start := end.Add(-1 * time.Hour)
if !req.Msg.Start.AsTime().IsZero() && !req.Msg.End.AsTime().IsZero() {
start = req.Msg.Start.AsTime()
end = req.Msg.End.AsTime()
}
step := end.Sub(start) / 1000
query := objective.QueryErrorBudget()
value, _, err := s.promAPI.QueryRange(contextSetPromCache(ctx, 15*time.Second), query, prometheusapiv1.Range{
Start: start,
End: end,
Step: step,
})
if err != nil {
level.Warn(s.logger).Log("msg", "failed to query error budget", "query", query, "err", err)
return nil, connect.NewError(connect.CodeInternal, err)
}
matrix, ok := value.(model.Matrix)
if !ok {
err := fmt.Errorf("no matrix returned")
level.Debug(s.logger).Log("msg", "returned data wasn't of type matrix", "query", query, "err", err)
return nil, connect.NewError(connect.CodeInternal, err)
}
if len(matrix) == 0 {
level.Debug(s.logger).Log("msg", "returned no data", "query", query)
return nil, connect.NewError(connect.CodeNotFound, nil)
}
valueLength := 0
for _, m := range matrix {
if len(m.Values) > valueLength {
valueLength = len(m.Values)
}
}