fix: Add missing actions-metrics-server command (#2099)

Fixes #2090

cmd/actionsmetricsserver/main.go

@@ -0,0 +1,226 @@
+/*
+Copyright 2022 The actions-runner-controller authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"context"
+	"errors"
+	"flag"
+	"fmt"
+	"net/http"
+	"os"
+	"sync"
+
+	actionsv1alpha1 "github.com/actions-runner-controller/actions-runner-controller/api/v1alpha1"
+	"github.com/actions-runner-controller/actions-runner-controller/github"
+	"github.com/actions-runner-controller/actions-runner-controller/logging"
+	"github.com/actions-runner-controller/actions-runner-controller/pkg/actionsmetrics"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+	"sigs.k8s.io/controller-runtime/pkg/metrics"
+
+	"github.com/kelseyhightower/envconfig"
+
+	"k8s.io/apimachinery/pkg/runtime"
+	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
+	_ "k8s.io/client-go/plugin/pkg/client/auth/exec"
+	_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
+	_ "k8s.io/client-go/plugin/pkg/client/auth/oidc"
+	ctrl "sigs.k8s.io/controller-runtime"
+	// +kubebuilder:scaffold:imports
+)
+
+var (
+	scheme = runtime.NewScheme()
+)
+
+const (
+	webhookSecretTokenEnvName = "GITHUB_WEBHOOK_SECRET_TOKEN"
+)
+
+func init() {
+	_ = clientgoscheme.AddToScheme(scheme)
+
+	_ = actionsv1alpha1.AddToScheme(scheme)
+	// +kubebuilder:scaffold:scheme
+}
+
+func main() {
+	var (
+		err error
+
+		webhookAddr string
+		metricsAddr string
+
+		// The secret token of the GitHub Webhook. See https://docs.github.com/en/developers/webhooks-and-events/securing-your-webhooks
+		webhookSecretToken    string
+		webhookSecretTokenEnv string
+
+		logLevel  string
+		logFormat string
+
+		ghClient *github.Client
+	)
+
+	var c github.Config
+	err = envconfig.Process("github", &c)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error: processing environment variables: %v\n", err)
+		os.Exit(1)
+	}
+
+	webhookSecretTokenEnv = os.Getenv(webhookSecretTokenEnvName)
+
+	flag.StringVar(&webhookAddr, "webhook-addr", ":8000", "The address the metric endpoint binds to.")
+	flag.StringVar(&metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.")
+	flag.StringVar(&logLevel, "log-level", logging.LogLevelDebug, `The verbosity of the logging. Valid values are "debug", "info", "warn", "error". Defaults to "debug".`)
+	flag.StringVar(&webhookSecretToken, "github-webhook-secret-token", "", "The personal access token of GitHub.")
+	flag.StringVar(&c.Token, "github-token", c.Token, "The personal access token of GitHub.")
+	flag.Int64Var(&c.AppID, "github-app-id", c.AppID, "The application ID of GitHub App.")
+	flag.Int64Var(&c.AppInstallationID, "github-app-installation-id", c.AppInstallationID, "The installation ID of GitHub App.")
+	flag.StringVar(&c.AppPrivateKey, "github-app-private-key", c.AppPrivateKey, "The path of a private key file to authenticate as a GitHub App")
+	flag.StringVar(&c.URL, "github-url", c.URL, "GitHub URL to be used for GitHub API calls")
+	flag.StringVar(&c.UploadURL, "github-upload-url", c.UploadURL, "GitHub Upload URL to be used for GitHub API calls")
+	flag.StringVar(&c.BasicauthUsername, "github-basicauth-username", c.BasicauthUsername, "Username for GitHub basic auth to use instead of PAT or GitHub APP in case it's running behind a proxy API")
+	flag.StringVar(&c.BasicauthPassword, "github-basicauth-password", c.BasicauthPassword, "Password for GitHub basic auth to use instead of PAT or GitHub APP in case it's running behind a proxy API")
+	flag.StringVar(&c.RunnerGitHubURL, "runner-github-url", c.RunnerGitHubURL, "GitHub URL to be used by runners during registration")
+	flag.StringVar(&logFormat, "log-format", "text", `The log format. Valid options are "text" and "json". Defaults to "text"`)
+
+	flag.Parse()
+
+	logger, err := logging.NewLogger(logLevel, logFormat)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error: creating logger: %v\n", err)
+		os.Exit(1)
+	}
+	logger.WithName("setup")
+
+	if webhookSecretToken == "" && webhookSecretTokenEnv != "" {
+		logger.Info(fmt.Sprintf("Using the value from %s for -github-webhook-secret-token", webhookSecretTokenEnvName))
+		webhookSecretToken = webhookSecretTokenEnv
+	}
+
+	if webhookSecretToken == "" {
+		logger.Info(fmt.Sprintf("-github-webhook-secret-token and %s are missing or empty. Create one following https://docs.github.com/en/developers/webhooks-and-events/securing-your-webhooks and specify it via the flag or the envvar", webhookSecretTokenEnvName))
+	}
+
+	ctrl.SetLogger(logger)
+
+	// Valid GitHub API credentials is required to call get workflow job logs
+	if len(c.Token) > 0 || (c.AppID > 0 && c.AppInstallationID > 0 && c.AppPrivateKey != "") || (len(c.BasicauthUsername) > 0 && len(c.BasicauthPassword) > 0) {
+		c.Log = &logger
+
+		ghClient, err = c.NewClient()
+		if err != nil {
+			fmt.Fprintln(os.Stderr, "Error: Client creation failed.", err)
+			logger.Error(err, "unable to create controller", "controller", "Runner")
+			os.Exit(1)
+		}
+	} else {
+		logger.Info("GitHub client is not initialized. Runner groups with custom visibility are not supported. If needed, please provide GitHub authentication. This will incur in extra GitHub API calls")
+	}
+
+	eventReader := &actionsmetrics.EventReader{
+		Log:          ctrl.Log.WithName("workflowjobmetrics-eventreader"),
+		GitHubClient: ghClient,
+		Events:       make(chan interface{}, 1024*1024),
+	}
+
+	webhookServer := &actionsmetrics.WebhookServer{
+		Log:            ctrl.Log.WithName("workflowjobmetrics-webhookserver"),
+		SecretKeyBytes: []byte(webhookSecretToken),
+		GitHubClient:   ghClient,
+		EventHooks:     []actionsmetrics.EventHook{eventReader.HandleWorkflowJobEvent},
+	}
+
+	var wg sync.WaitGroup
+
+	ctx, cancel := context.WithCancel(context.Background())
+
+	wg.Add(1)
+	go func() {
+		defer cancel()
+		defer wg.Done()
+		eventReader.ProcessWorkflowJobEvents(ctx)
+	}()
+
+	// Metrics Server
+
+	metricsHandler := promhttp.HandlerFor(metrics.Registry, promhttp.HandlerOpts{
+		ErrorHandling: promhttp.HTTPErrorOnError,
+	})
+
+	metricsMux := http.NewServeMux()
+	metricsMux.HandleFunc("/", metricsHandler.ServeHTTP)
+
+	metricsSrv := http.Server{
+		Addr:    metricsAddr,
+		Handler: metricsMux,
+	}
+
+	wg.Add(1)
+	go func() {
+		defer cancel()
+		defer wg.Done()
+
+		go func() {
+			<-ctx.Done()
+
+			metricsSrv.Shutdown(context.Background())
+		}()
+
+		if err := metricsSrv.ListenAndServe(); err != nil {
+			if !errors.Is(err, http.ErrServerClosed) {
+				logger.Error(err, "problem running metrics server")
+			}
+		}
+	}()
+
+	// Webhook Server
+
+	mux := http.NewServeMux()
+	mux.HandleFunc("/", webhookServer.Handle)
+
+	srv := http.Server{
+		Addr:    webhookAddr,
+		Handler: mux,
+	}
+
+	wg.Add(1)
+	go func() {
+		defer cancel()
+		defer wg.Done()
+
+		go func() {
+			<-ctx.Done()
+
+			srv.Shutdown(context.Background())
+		}()
+
+		if err := srv.ListenAndServe(); err != nil {
+			if !errors.Is(err, http.ErrServerClosed) {
+				logger.Error(err, "problem running http server")
+			}
+		}
+	}()
+
+	go func() {
+		<-ctrl.SetupSignalHandler().Done()
+		cancel()
+	}()
+
+	wg.Wait()
+}