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main.go
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main.go
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/*
Copyright 2017 The Kubernetes 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"
"flag"
"net/http"
"os"
"strconv"
"time"
"github.com/sirupsen/logrus"
"k8s.io/test-infra/prow/interrupts"
"sigs.k8s.io/controller-runtime/pkg/manager"
"k8s.io/test-infra/pkg/flagutil"
"k8s.io/test-infra/pkg/io"
"k8s.io/test-infra/prow/config"
"k8s.io/test-infra/prow/config/secret"
prowflagutil "k8s.io/test-infra/prow/flagutil"
"k8s.io/test-infra/prow/git/v2"
"k8s.io/test-infra/prow/logrusutil"
"k8s.io/test-infra/prow/metrics"
"k8s.io/test-infra/prow/pjutil"
"k8s.io/test-infra/prow/tide"
)
type options struct {
port int
configPath string
jobConfigPath string
syncThrottle int
statusThrottle int
dryRun bool
runOnce bool
kubernetes prowflagutil.KubernetesOptions
github prowflagutil.GitHubOptions
maxRecordsPerPool int
// The following are used for reading/writing to GCS.
gcsCredentialsFile string
// historyURI where Tide should store its action history.
// Can be a /local/path or gs://path/to/object.
// GCS writes will use the bucket's default acl for new objects. Ensure both that
// a) the gcs credentials can write to this bucket
// b) the default acls do not expose any private info
historyURI string
// statusURI where Tide store status update state.
// Can be a /local/path or gs://path/to/object.
// GCS writes will use the bucket's default acl for new objects. Ensure both that
// a) the gcs credentials can write to this bucket
// b) the default acls do not expose any private info
statusURI string
}
func (o *options) Validate() error {
for _, group := range []flagutil.OptionGroup{&o.kubernetes, &o.github} {
if err := group.Validate(o.dryRun); err != nil {
return err
}
}
return nil
}
func gatherOptions(fs *flag.FlagSet, args ...string) options {
var o options
fs.IntVar(&o.port, "port", 8888, "Port to listen on.")
fs.StringVar(&o.configPath, "config-path", "", "Path to config.yaml.")
fs.StringVar(&o.jobConfigPath, "job-config-path", "", "Path to prow job configs.")
fs.BoolVar(&o.dryRun, "dry-run", true, "Whether to mutate any real-world state.")
fs.BoolVar(&o.runOnce, "run-once", false, "If true, run only once then quit.")
for _, group := range []flagutil.OptionGroup{&o.kubernetes, &o.github} {
group.AddFlags(fs)
}
fs.IntVar(&o.syncThrottle, "sync-hourly-tokens", 800, "The maximum number of tokens per hour to be used by the sync controller.")
fs.IntVar(&o.statusThrottle, "status-hourly-tokens", 400, "The maximum number of tokens per hour to be used by the status controller.")
fs.IntVar(&o.maxRecordsPerPool, "max-records-per-pool", 1000, "The maximum number of history records stored for an individual Tide pool.")
fs.StringVar(&o.gcsCredentialsFile, "gcs-credentials-file", "", "File where Google Cloud authentication credentials are stored. Required for GCS writes.")
fs.StringVar(&o.historyURI, "history-uri", "", "The /local/path or gs://path/to/object to store tide action history. GCS writes will use the default object ACL for the bucket")
fs.StringVar(&o.statusURI, "status-path", "", "The /local/path or gs://path/to/object to store status controller state. GCS writes will use the default object ACL for the bucket.")
fs.Parse(args)
o.configPath = config.ConfigPath(o.configPath)
return o
}
func main() {
logrusutil.ComponentInit("tide")
defer interrupts.WaitForGracefulShutdown()
pjutil.ServePProf()
o := gatherOptions(flag.NewFlagSet(os.Args[0], flag.ExitOnError), os.Args[1:]...)
if err := o.Validate(); err != nil {
logrus.WithError(err).Fatal("Invalid options")
}
opener, err := io.NewOpener(context.Background(), o.gcsCredentialsFile)
if err != nil {
entry := logrus.WithError(err)
if p := o.gcsCredentialsFile; p != "" {
entry = entry.WithField("gcs-credentials-file", p)
}
entry.Fatal("Cannot create opener")
}
configAgent := &config.Agent{}
if err := configAgent.Start(o.configPath, o.jobConfigPath); err != nil {
logrus.WithError(err).Fatal("Error starting config agent.")
}
cfg := configAgent.Config
secretAgent := &secret.Agent{}
if err := secretAgent.Start([]string{o.github.TokenPath}); err != nil {
logrus.WithError(err).Fatal("Error starting secrets agent.")
}
githubSync, err := o.github.GitHubClientWithLogFields(secretAgent, o.dryRun, logrus.Fields{"controller": "sync"})
if err != nil {
logrus.WithError(err).Fatal("Error getting GitHub client for sync.")
}
githubStatus, err := o.github.GitHubClientWithLogFields(secretAgent, o.dryRun, logrus.Fields{"controller": "status-update"})
if err != nil {
logrus.WithError(err).Fatal("Error getting GitHub client for status.")
}
// The sync loop should be allowed more tokens than the status loop because
// it has to list all PRs in the pool every loop while the status loop only
// has to list changed PRs every loop.
// The sync loop should have a much lower burst allowance than the status
// loop which may need to update many statuses upon restarting Tide after
// changing the context format or starting Tide on a new repo.
githubSync.Throttle(o.syncThrottle, 3*tokensPerIteration(o.syncThrottle, cfg().Tide.SyncPeriod.Duration))
githubStatus.Throttle(o.statusThrottle, o.statusThrottle/2)
gitClient, err := o.github.GitClient(secretAgent, o.dryRun)
if err != nil {
logrus.WithError(err).Fatal("Error getting Git client.")
}
kubeCfg, err := o.kubernetes.InfrastructureClusterConfig(o.dryRun)
if err != nil {
logrus.WithError(err).Fatal("Error getting kubeconfig.")
}
// Do not activate leader election here, as we do not use the `mgr` to control the lifecylcle of our cotrollers,
// this would just be a no-op.
mgr, err := manager.New(kubeCfg, manager.Options{Namespace: cfg().ProwJobNamespace, MetricsBindAddress: "0"})
if err != nil {
logrus.WithError(err).Fatal("Error constructing mgr.")
}
c, err := tide.NewController(githubSync, githubStatus, mgr, cfg, git.ClientFactoryFrom(gitClient), o.maxRecordsPerPool, opener, o.historyURI, o.statusURI, nil)
if err != nil {
logrus.WithError(err).Fatal("Error creating Tide controller.")
}
interrupts.Run(func(ctx context.Context) {
if err := mgr.Start(ctx.Done()); err != nil {
logrus.WithError(err).Fatal("Mgr failed.")
}
logrus.Info("Mgr finished gracefully.")
})
mgrSyncCtx, mgrSyncCtxCancel := context.WithTimeout(context.Background(), 30*time.Second)
defer mgrSyncCtxCancel()
if synced := mgr.GetCache().WaitForCacheSync(mgrSyncCtx.Done()); !synced {
logrus.Fatal("Timed out waiting for cachesync")
}
interrupts.OnInterrupt(func() {
c.Shutdown()
if err := gitClient.Clean(); err != nil {
logrus.WithError(err).Error("Could not clean up git client cache.")
}
})
http.Handle("/", c)
http.Handle("/history", c.History)
server := &http.Server{Addr: ":" + strconv.Itoa(o.port)}
// Push metrics to the configured prometheus pushgateway endpoint or serve them
metrics.ExposeMetrics("tide", cfg().PushGateway)
start := time.Now()
sync(c)
if o.runOnce {
return
}
// serve data
interrupts.ListenAndServe(server, 10*time.Second)
// run the controller, but only after one sync period expires after our first run
time.Sleep(time.Until(start.Add(cfg().Tide.SyncPeriod.Duration)))
interrupts.Tick(func() {
sync(c)
}, func() time.Duration {
return cfg().Tide.SyncPeriod.Duration
})
}
func sync(c *tide.Controller) {
if err := c.Sync(); err != nil {
logrus.WithError(err).Error("Error syncing.")
}
}
func tokensPerIteration(hourlyTokens int, iterPeriod time.Duration) int {
tokenRate := float64(hourlyTokens) / float64(time.Hour)
return int(tokenRate * float64(iterPeriod))
}