/
centralapplicationconnectivityvalidator.go
197 lines (173 loc) · 6.02 KB
/
centralapplicationconnectivityvalidator.go
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package main
import (
"context"
"fmt"
"net"
"net/http"
"os"
"os/signal"
"syscall"
"time"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/manager"
"github.com/kyma-project/kyma/common/logging/logger"
"github.com/kyma-project/kyma/common/logging/tracing"
"github.com/kyma-project/kyma/components/central-application-gateway/pkg/apis/applicationconnector/v1alpha1"
"github.com/kyma-project/kyma/components/central-application-connectivity-validator/internal/controller"
"github.com/kyma-project/kyma/components/central-application-connectivity-validator/internal/externalapi"
"github.com/kyma-project/kyma/components/central-application-connectivity-validator/internal/validationproxy"
"github.com/oklog/run"
"github.com/patrickmn/go-cache"
"k8s.io/apimachinery/pkg/runtime"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
clientgoscheme "k8s.io/client-go/kubernetes/scheme"
ctrl "sigs.k8s.io/controller-runtime"
)
const (
shutdownTimeout = 2 * time.Second
)
var (
scheme = runtime.NewScheme()
)
func init() {
utilruntime.Must(clientgoscheme.AddToScheme(scheme))
utilruntime.Must(v1alpha1.AddToScheme(scheme))
}
func main() {
options, err := parseOptions()
if err != nil {
if logErr := logger.LogFatalError("Failed to parse options: %s", err.Error()); logErr != nil {
fmt.Printf("Failed to initializie default fatal error logger: %s,Failed to parse options: %s", logErr, err)
}
os.Exit(1)
}
if err = options.validate(); err != nil {
if logErr := logger.LogFatalError("Failed to validate options: %s", err.Error()); logErr != nil {
fmt.Printf("Failed to initializie default fatal error logger: %s,Failed to validate options: %s", logErr, err)
}
os.Exit(1)
}
level, err := logger.MapLevel(options.LogLevel)
if err != nil {
if logErr := logger.LogFatalError("Failed to map log level from options: %s", err.Error()); logErr != nil {
fmt.Printf("Failed to initializie default fatal error logger: %s, Failed to map log level from options: %s", logErr, err)
}
os.Exit(2)
}
format, err := logger.MapFormat(options.LogFormat)
if err != nil {
if logErr := logger.LogFatalError("Failed to map log format from options: %s", err.Error()); logErr != nil {
fmt.Printf("Failed to initializie default fatal error logger: %s, Failed to map log format from options: %s", logErr, err)
}
os.Exit(3)
}
log, err := logger.New(format, level)
if err != nil {
if logErr := logger.LogFatalError("Failed to initialize logger: %s", err.Error()); logErr != nil {
fmt.Printf("Failed to initializie default fatal error logger: %s, Failed to initialize logger: %s", logErr, err)
}
os.Exit(4)
}
if err := logger.InitKlog(log, level); err != nil {
log.WithContext().Error("While initializing klog logger: %s", err.Error())
os.Exit(5)
}
log.WithContext().With("options", options).Info("Starting Validation Proxy.")
idCache := cache.New(
cache.NoExpiration,
cache.NoExpiration,
)
idCache.OnEvicted(func(key string, i interface{}) {
log.WithContext().
With("controller", "cache_janitor").
With("name", key).
Warnf("Deleted the application from the cache with values %v.", i)
})
proxyHandler := validationproxy.NewProxyHandler(
options.eventingPublisherHost,
options.eventingDestinationPath,
idCache,
log)
tracingMiddleware := tracing.NewTracingMiddleware(proxyHandler.ProxyAppConnectorRequests)
proxyServer := http.Server{
Handler: validationproxy.NewHandler(tracingMiddleware),
Addr: fmt.Sprintf(":%d", options.proxyPort),
}
externalServer := http.Server{
Handler: externalapi.NewHandler(),
Addr: fmt.Sprintf(":%d", options.externalAPIPort),
}
mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
Scheme: scheme,
MetricsBindAddress: "0",
SyncPeriod: &options.syncPeriod,
ClientDisableCacheFor: []client.Object{
&v1alpha1.Application{},
},
})
if err != nil {
log.WithContext().Error("Unable to start manager: %s", err.Error())
os.Exit(1)
}
if err = controller.NewController(
log,
mgr.GetClient(),
idCache,
options.appNamePlaceholder,
options.eventingPathPrefixV1,
options.eventingPathPrefixV2,
options.eventingPathPrefixEvents).SetupWithManager(mgr); err != nil {
log.WithContext().Error("Unable to create reconciler: %s", err.Error())
os.Exit(1)
}
ctx, cancel := context.WithCancel(context.Background())
var g run.Group
addInterruptSignalToRunGroup(ctx, cancel, log, &g)
addManagerToRunGroup(ctx, log, &g, mgr)
addHttpServerToRunGroup(log, "proxy-server", &g, &proxyServer)
addHttpServerToRunGroup(log, "external-server", &g, &externalServer)
err = g.Run()
if err != nil && err != http.ErrServerClosed {
log.WithContext().Fatal(err)
}
}
func addHttpServerToRunGroup(log *logger.Logger, name string, g *run.Group, srv *http.Server) {
log.WithContext().Infof("Starting %s HTTP server on %s", name, srv.Addr)
ln, err := net.Listen("tcp", srv.Addr)
if err != nil {
log.WithContext().Fatalf("Unable to start %s HTTP server: '%s'", name, err.Error())
}
g.Add(func() error {
defer log.WithContext().Infof("Server %s finished", name)
return srv.Serve(ln)
}, func(error) {
log.WithContext().Infof("Shutting down %s HTTP server on %s", name, srv.Addr)
ctx, cancel := context.WithTimeout(context.Background(), shutdownTimeout)
defer cancel()
err = srv.Shutdown(ctx)
if err != nil && err != http.ErrServerClosed {
log.WithContext().Warnf("HTTP server shutdown %s failed: %s", name, err.Error())
}
})
}
func addManagerToRunGroup(ctx context.Context, log *logger.Logger, g *run.Group, mgr manager.Manager) {
g.Add(func() error {
defer log.WithContext().Infof("Manager finished")
return mgr.Start(ctx)
}, func(error) {
})
}
func addInterruptSignalToRunGroup(ctx context.Context, cancel context.CancelFunc, log *logger.Logger, g *run.Group) {
g.Add(func() error {
c := make(chan os.Signal, 1)
signal.Notify(c, syscall.SIGINT, syscall.SIGTERM)
select {
case <-ctx.Done():
case sig := <-c:
log.WithContext().Infof("received signal %s", sig)
}
return nil
}, func(error) {
cancel()
})
}