source-controller/main.go

293 lines
9.4 KiB
Go

/*
Copyright 2020 The Flux 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 (
"fmt"
"net"
"net/http"
"os"
"path/filepath"
"strings"
"time"
"github.com/go-logr/logr"
flag "github.com/spf13/pflag"
"helm.sh/helm/v3/pkg/getter"
"k8s.io/apimachinery/pkg/runtime"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
clientgoscheme "k8s.io/client-go/kubernetes/scheme"
_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
ctrl "sigs.k8s.io/controller-runtime"
crtlmetrics "sigs.k8s.io/controller-runtime/pkg/metrics"
"github.com/fluxcd/pkg/runtime/client"
"github.com/fluxcd/pkg/runtime/events"
"github.com/fluxcd/pkg/runtime/leaderelection"
"github.com/fluxcd/pkg/runtime/logger"
"github.com/fluxcd/pkg/runtime/metrics"
"github.com/fluxcd/pkg/runtime/pprof"
"github.com/fluxcd/pkg/runtime/probes"
sourcev1 "github.com/fluxcd/source-controller/api/v1beta1"
"github.com/fluxcd/source-controller/controllers"
// +kubebuilder:scaffold:imports
)
const controllerName = "source-controller"
var (
scheme = runtime.NewScheme()
setupLog = ctrl.Log.WithName("setup")
getters = getter.Providers{
getter.Provider{
Schemes: []string{"http", "https"},
New: getter.NewHTTPGetter,
},
}
)
func init() {
utilruntime.Must(clientgoscheme.AddToScheme(scheme))
utilruntime.Must(sourcev1.AddToScheme(scheme))
// +kubebuilder:scaffold:scheme
}
func main() {
var (
metricsAddr string
eventsAddr string
healthAddr string
storagePath string
storageAddr string
storageAdvAddr string
concurrent int
requeueDependency time.Duration
watchAllNamespaces bool
clientOptions client.Options
logOptions logger.Options
leaderElectionOptions leaderelection.Options
)
flag.StringVar(&metricsAddr, "metrics-addr", envOrDefault("METRICS_ADDR", ":8080"),
"The address the metric endpoint binds to.")
flag.StringVar(&eventsAddr, "events-addr", envOrDefault("EVENTS_ADDR", ""),
"The address of the events receiver.")
flag.StringVar(&healthAddr, "health-addr", ":9440", "The address the health endpoint binds to.")
flag.StringVar(&storagePath, "storage-path", envOrDefault("STORAGE_PATH", ""),
"The local storage path.")
flag.StringVar(&storageAddr, "storage-addr", envOrDefault("STORAGE_ADDR", ":9090"),
"The address the static file server binds to.")
flag.StringVar(&storageAdvAddr, "storage-adv-addr", envOrDefault("STORAGE_ADV_ADDR", ""),
"The advertised address of the static file server.")
flag.IntVar(&concurrent, "concurrent", 2, "The number of concurrent reconciles per controller.")
flag.BoolVar(&watchAllNamespaces, "watch-all-namespaces", true,
"Watch for custom resources in all namespaces, if set to false it will only watch the runtime namespace.")
flag.DurationVar(&requeueDependency, "requeue-dependency", 30*time.Second, "The interval at which failing dependencies are reevaluated.")
clientOptions.BindFlags(flag.CommandLine)
logOptions.BindFlags(flag.CommandLine)
leaderElectionOptions.BindFlags(flag.CommandLine)
flag.Parse()
ctrl.SetLogger(logger.NewLogger(logOptions))
var eventRecorder *events.Recorder
if eventsAddr != "" {
if er, err := events.NewRecorder(eventsAddr, controllerName); err != nil {
setupLog.Error(err, "unable to create event recorder")
os.Exit(1)
} else {
eventRecorder = er
}
}
metricsRecorder := metrics.NewRecorder()
crtlmetrics.Registry.MustRegister(metricsRecorder.Collectors()...)
watchNamespace := ""
if !watchAllNamespaces {
watchNamespace = os.Getenv("RUNTIME_NAMESPACE")
}
restConfig := client.GetConfigOrDie(clientOptions)
mgr, err := ctrl.NewManager(restConfig, ctrl.Options{
Scheme: scheme,
MetricsBindAddress: metricsAddr,
HealthProbeBindAddress: healthAddr,
Port: 9443,
LeaderElection: leaderElectionOptions.Enable,
LeaderElectionReleaseOnCancel: leaderElectionOptions.ReleaseOnCancel,
LeaseDuration: &leaderElectionOptions.LeaseDuration,
RenewDeadline: &leaderElectionOptions.RenewDeadline,
RetryPeriod: &leaderElectionOptions.RetryPeriod,
LeaderElectionID: fmt.Sprintf("%s-leader-election", controllerName),
Namespace: watchNamespace,
Logger: ctrl.Log,
})
if err != nil {
setupLog.Error(err, "unable to start manager")
os.Exit(1)
}
probes.SetupChecks(mgr, setupLog)
pprof.SetupHandlers(mgr, setupLog)
if storageAdvAddr == "" {
storageAdvAddr = determineAdvStorageAddr(storageAddr, setupLog)
}
storage := mustInitStorage(storagePath, storageAdvAddr, setupLog)
if err = (&controllers.GitRepositoryReconciler{
Client: mgr.GetClient(),
Scheme: mgr.GetScheme(),
Storage: storage,
EventRecorder: mgr.GetEventRecorderFor(controllerName),
ExternalEventRecorder: eventRecorder,
MetricsRecorder: metricsRecorder,
}).SetupWithManagerAndOptions(mgr, controllers.GitRepositoryReconcilerOptions{
MaxConcurrentReconciles: concurrent,
DependencyRequeueInterval: requeueDependency,
}); err != nil {
setupLog.Error(err, "unable to create controller", "controller", sourcev1.GitRepositoryKind)
os.Exit(1)
}
if err = (&controllers.HelmRepositoryReconciler{
Client: mgr.GetClient(),
Scheme: mgr.GetScheme(),
Storage: storage,
Getters: getters,
EventRecorder: mgr.GetEventRecorderFor(controllerName),
ExternalEventRecorder: eventRecorder,
MetricsRecorder: metricsRecorder,
}).SetupWithManagerAndOptions(mgr, controllers.HelmRepositoryReconcilerOptions{
MaxConcurrentReconciles: concurrent,
}); err != nil {
setupLog.Error(err, "unable to create controller", "controller", sourcev1.HelmRepositoryKind)
os.Exit(1)
}
if err = (&controllers.HelmChartReconciler{
Client: mgr.GetClient(),
Scheme: mgr.GetScheme(),
Storage: storage,
Getters: getters,
EventRecorder: mgr.GetEventRecorderFor(controllerName),
ExternalEventRecorder: eventRecorder,
MetricsRecorder: metricsRecorder,
}).SetupWithManagerAndOptions(mgr, controllers.HelmChartReconcilerOptions{
MaxConcurrentReconciles: concurrent,
}); err != nil {
setupLog.Error(err, "unable to create controller", "controller", sourcev1.HelmChartKind)
os.Exit(1)
}
if err = (&controllers.BucketReconciler{
Client: mgr.GetClient(),
Scheme: mgr.GetScheme(),
Storage: storage,
EventRecorder: mgr.GetEventRecorderFor(controllerName),
ExternalEventRecorder: eventRecorder,
MetricsRecorder: metricsRecorder,
}).SetupWithManagerAndOptions(mgr, controllers.BucketReconcilerOptions{
MaxConcurrentReconciles: concurrent,
}); err != nil {
setupLog.Error(err, "unable to create controller", "controller", "Bucket")
os.Exit(1)
}
// +kubebuilder:scaffold:builder
go func() {
// Block until our controller manager is elected leader. We presume our
// entire process will terminate if we lose leadership, so we don't need
// to handle that.
<-mgr.Elected()
startFileServer(storage.BasePath, storageAddr, setupLog)
}()
setupLog.Info("starting manager")
if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
setupLog.Error(err, "problem running manager")
os.Exit(1)
}
}
func startFileServer(path string, address string, l logr.Logger) {
l.Info("starting file server")
fs := http.FileServer(http.Dir(path))
http.Handle("/", fs)
err := http.ListenAndServe(address, nil)
if err != nil {
l.Error(err, "file server error")
}
}
func mustInitStorage(path string, storageAdvAddr string, l logr.Logger) *controllers.Storage {
if path == "" {
p, _ := os.Getwd()
path = filepath.Join(p, "bin")
os.MkdirAll(path, 0777)
}
storage, err := controllers.NewStorage(path, storageAdvAddr, 5*time.Minute)
if err != nil {
l.Error(err, "unable to initialise storage")
os.Exit(1)
}
return storage
}
func determineAdvStorageAddr(storageAddr string, l logr.Logger) string {
// TODO(hidde): remove next MINOR prerelease as it can be passed in using
// Kubernetes' substitution.
if os.Getenv("RUNTIME_NAMESPACE") != "" {
svcParts := strings.Split(os.Getenv("HOSTNAME"), "-")
return fmt.Sprintf("%s.%s",
strings.Join(svcParts[:len(svcParts)-2], "-"), os.Getenv("RUNTIME_NAMESPACE"))
}
host, port, err := net.SplitHostPort(storageAddr)
if err != nil {
l.Error(err, "unable to parse storage address")
os.Exit(1)
}
switch host {
case "":
host = "localhost"
case "0.0.0.0":
host = os.Getenv("HOSTNAME")
if host == "" {
hn, err := os.Hostname()
if err != nil {
l.Error(err, "0.0.0.0 specified in storage addr but hostname is invalid")
os.Exit(1)
}
host = hn
}
}
return net.JoinHostPort(host, port)
}
func envOrDefault(envName, defaultValue string) string {
ret := os.Getenv(envName)
if ret != "" {
return ret
}
return defaultValue
}