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zz_main.go
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zz_main.go
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// SPDX-FileCopyrightText: 2024 The Crossplane Authors <https://crossplane.io>
//
// SPDX-License-Identifier: Apache-2.0
package main
import (
"context"
"fmt"
"io"
"log"
"os"
"path/filepath"
"time"
xpv1 "github.com/crossplane/crossplane-runtime/apis/common/v1"
"github.com/crossplane/crossplane-runtime/pkg/certificates"
xpcontroller "github.com/crossplane/crossplane-runtime/pkg/controller"
"github.com/crossplane/crossplane-runtime/pkg/feature"
"github.com/crossplane/crossplane-runtime/pkg/logging"
"github.com/crossplane/crossplane-runtime/pkg/ratelimiter"
"github.com/crossplane/crossplane-runtime/pkg/reconciler/managed"
"github.com/crossplane/crossplane-runtime/pkg/resource"
"github.com/crossplane/crossplane-runtime/pkg/statemetrics"
tjcontroller "github.com/crossplane/upjet/pkg/controller"
"github.com/crossplane/upjet/pkg/controller/conversion"
"gopkg.in/alecthomas/kingpin.v2"
kerrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
"k8s.io/client-go/tools/leaderelection/resourcelock"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/cache"
"sigs.k8s.io/controller-runtime/pkg/log/zap"
"sigs.k8s.io/controller-runtime/pkg/metrics"
"sigs.k8s.io/controller-runtime/pkg/webhook"
"github.com/upbound/provider-gcp/apis"
"github.com/upbound/provider-gcp/apis/v1alpha1"
"github.com/upbound/provider-gcp/config"
resolverapis "github.com/upbound/provider-gcp/internal/apis"
"github.com/upbound/provider-gcp/internal/clients"
"github.com/upbound/provider-gcp/internal/controller"
"github.com/upbound/provider-gcp/internal/features"
)
const (
webhookTLSCertDirEnvVar = "WEBHOOK_TLS_CERT_DIR"
tlsServerCertDirEnvVar = "TLS_SERVER_CERTS_DIR"
certsDirEnvVar = "CERTS_DIR"
tlsServerCertDir = "/tls/server"
)
func deprecationAction(flagName string) kingpin.Action {
return func(c *kingpin.ParseContext) error {
_, err := fmt.Fprintf(os.Stderr, "warning: Command-line flag %q is deprecated and no longer used. It will be removed in a future release. Please remove it from all of your configurations (ControllerConfigs, etc.).\n", flagName)
kingpin.FatalIfError(err, "Failed to print the deprecation notice.")
return nil
}
}
func main() {
var (
app = kingpin.New(filepath.Base(os.Args[0]), "Terraform based Crossplane provider for GCP").DefaultEnvars()
debug = app.Flag("debug", "Run with debug logging.").Short('d').Bool()
syncInterval = app.Flag("sync", "Sync interval controls how often all resources will be double checked for drift.").Short('s').Default("1h").Duration()
pollInterval = app.Flag("poll", "Poll interval controls how often an individual resource should be checked for drift.").Default("10m").Duration()
pollStateMetricInterval = app.Flag("poll-state-metric", "State metric recording interval").Default("5s").Duration()
leaderElection = app.Flag("leader-election", "Use leader election for the controller manager.").Short('l').Default("false").OverrideDefaultFromEnvar("LEADER_ELECTION").Bool()
maxReconcileRate = app.Flag("max-reconcile-rate", "The global maximum rate per second at which resources may checked for drift from the desired state.").Default("100").Int()
namespace = app.Flag("namespace", "Namespace used to set as default scope in default secret store config.").Default("crossplane-system").Envar("POD_NAMESPACE").String()
essTLSCertsPath = app.Flag("ess-tls-cert-dir", "Path of ESS TLS certificates.").Envar("ESS_TLS_CERTS_DIR").String()
enableExternalSecretStores = app.Flag("enable-external-secret-stores", "Enable support for ExternalSecretStores.").Default("false").Envar("ENABLE_EXTERNAL_SECRET_STORES").Bool()
enableManagementPolicies = app.Flag("enable-management-policies", "Enable support for Management Policies.").Default("true").Envar("ENABLE_MANAGEMENT_POLICIES").Bool()
certsDirSet = false
// we record whether the command-line option "--certs-dir" was supplied
// in the registered PreAction for the flag.
certsDir = app.Flag("certs-dir", "The directory that contains the server key and certificate.").Default(tlsServerCertDir).Envar(certsDirEnvVar).PreAction(func(_ *kingpin.ParseContext) error {
certsDirSet = true
return nil
}).String()
// now deprecated command-line arguments with the Terraform SDK-based upjet architecture
_ = app.Flag("provider-ttl", "[DEPRECATED: This option is no longer used and it will be removed in a future release.] TTL for the native plugin processes before they are replaced. Changing the default may increase memory consumption.").Hidden().Action(deprecationAction("provider-ttl")).Int()
_ = app.Flag("terraform-version", "[DEPRECATED: This option is no longer used and it will be removed in a future release.] Terraform version.").Envar("TERRAFORM_VERSION").Hidden().Action(deprecationAction("terraform-version")).String()
_ = app.Flag("terraform-provider-version", "[DEPRECATED: This option is no longer used and it will be removed in a future release.] Terraform provider version.").Envar("TERRAFORM_PROVIDER_VERSION").Hidden().Action(deprecationAction("terraform-provider-version")).String()
_ = app.Flag("terraform-native-provider-path", "[DEPRECATED: This option is no longer used and it will be removed in a future release.] Terraform native provider path for shared execution.").Envar("TERRAFORM_NATIVE_PROVIDER_PATH").Hidden().Action(deprecationAction("terraform-native-provider-path")).String()
_ = app.Flag("terraform-provider-source", "[DEPRECATED: This option is no longer used and it will be removed in a future release.] Terraform provider source.").Envar("TERRAFORM_PROVIDER_SOURCE").Hidden().Action(deprecationAction("terraform-provider-source")).String()
)
kingpin.MustParse(app.Parse(os.Args[1:]))
log.Default().SetOutput(io.Discard)
ctrl.SetLogger(zap.New(zap.WriteTo(io.Discard)))
zl := zap.New(zap.UseDevMode(*debug))
logr := logging.NewLogrLogger(zl.WithName("provider-gcp"))
if *debug {
// The controller-runtime runs with a no-op logger by default. It is
// *very* verbose even at info level, so we only provide it a real
// logger when we're running in debug mode.
ctrl.SetLogger(zl)
}
logr.Info("warning: The monolithic package is deprecated in favor of the GCP family's resource packages " +
"and will no longer be maintained after 12 June 2024. Please consider switching to the family provider packages " +
"as we will no longer be publishing new versions of the monolithic package." +
"You can find more information about the provider families from the following link: https://docs.upbound.io/providers/provider-families/")
// currently, we configure the jitter to be the 5% of the poll interval
pollJitter := time.Duration(float64(*pollInterval) * 0.05)
logr.Debug("Starting", "sync-interval", syncInterval.String(),
"poll-interval", pollInterval.String(), "poll-jitter", pollJitter, "max-reconcile-rate", *maxReconcileRate)
cfg, err := ctrl.GetConfig()
kingpin.FatalIfError(err, "Cannot get API server rest config")
// Get the TLS certs directory from the environment variables set by
// Crossplane if they're available.
// In older XP versions we used WEBHOOK_TLS_CERT_DIR, in newer versions
// we use TLS_SERVER_CERTS_DIR. If an explicit certs dir is not supplied
// via the command-line options, then these environment variables are used
// instead.
if !certsDirSet {
// backwards-compatibility concerns
xpCertsDir := os.Getenv(certsDirEnvVar)
if xpCertsDir == "" {
xpCertsDir = os.Getenv(tlsServerCertDirEnvVar)
}
if xpCertsDir == "" {
xpCertsDir = os.Getenv(webhookTLSCertDirEnvVar)
}
// we probably don't need this condition but just to be on the
// safe side, if we are missing any kingpin machinery details...
if xpCertsDir != "" {
*certsDir = xpCertsDir
}
}
mgr, err := ctrl.NewManager(ratelimiter.LimitRESTConfig(cfg, *maxReconcileRate), ctrl.Options{
LeaderElection: *leaderElection,
LeaderElectionID: "crossplane-leader-election-provider-gcp",
Cache: cache.Options{
SyncPeriod: syncInterval,
},
WebhookServer: webhook.NewServer(
webhook.Options{
CertDir: *certsDir,
}),
LeaderElectionResourceLock: resourcelock.LeasesResourceLock,
LeaseDuration: func() *time.Duration { d := 60 * time.Second; return &d }(),
RenewDeadline: func() *time.Duration { d := 50 * time.Second; return &d }(),
})
kingpin.FatalIfError(err, "Cannot create controller manager")
kingpin.FatalIfError(apis.AddToScheme(mgr.GetScheme()), "Cannot add GCP APIs to scheme")
kingpin.FatalIfError(resolverapis.BuildScheme(apis.AddToSchemes), "Cannot register the GCP APIs with the API resolver's runtime scheme")
metricRecorder := managed.NewMRMetricRecorder()
stateMetrics := statemetrics.NewMRStateMetrics()
metrics.Registry.MustRegister(metricRecorder)
metrics.Registry.MustRegister(stateMetrics)
ctx := context.Background()
provider, err := config.GetProvider(ctx, false)
kingpin.FatalIfError(err, "Cannot initialize the provider configuration")
o := tjcontroller.Options{
Options: xpcontroller.Options{
Logger: logr,
GlobalRateLimiter: ratelimiter.NewGlobal(*maxReconcileRate),
PollInterval: *pollInterval,
MaxConcurrentReconciles: *maxReconcileRate,
Features: &feature.Flags{},
MetricOptions: &xpcontroller.MetricOptions{
PollStateMetricInterval: *pollStateMetricInterval,
MRMetrics: metricRecorder,
MRStateMetrics: stateMetrics,
},
},
Provider: provider,
SetupFn: clients.TerraformSetupBuilder(provider.TerraformProvider),
PollJitter: pollJitter,
OperationTrackerStore: tjcontroller.NewOperationStore(logr),
StartWebhooks: *certsDir != "",
}
if *enableManagementPolicies {
o.Features.Enable(features.EnableBetaManagementPolicies)
logr.Info("Beta feature enabled", "flag", features.EnableBetaManagementPolicies)
}
if *enableExternalSecretStores {
o.SecretStoreConfigGVK = &v1alpha1.StoreConfigGroupVersionKind
logr.Info("Alpha feature enabled", "flag", features.EnableAlphaExternalSecretStores)
o.ESSOptions = &tjcontroller.ESSOptions{}
if *essTLSCertsPath != "" {
logr.Info("ESS TLS certificates path is set. Loading mTLS configuration.")
tCfg, err := certificates.LoadMTLSConfig(filepath.Join(*essTLSCertsPath, "ca.crt"), filepath.Join(*essTLSCertsPath, "tls.crt"), filepath.Join(*essTLSCertsPath, "tls.key"), false)
kingpin.FatalIfError(err, "Cannot load ESS TLS config.")
o.ESSOptions.TLSConfig = tCfg
}
// Ensure default store config exists.
kingpin.FatalIfError(resource.Ignore(kerrors.IsAlreadyExists, mgr.GetClient().Create(ctx, &v1alpha1.StoreConfig{
TypeMeta: metav1.TypeMeta{},
ObjectMeta: metav1.ObjectMeta{
Name: "default",
},
Spec: v1alpha1.StoreConfigSpec{
// NOTE(turkenh): We only set required spec and expect optional
// ones to properly be initialized with CRD level default values.
SecretStoreConfig: xpv1.SecretStoreConfig{
DefaultScope: *namespace,
},
},
Status: v1alpha1.StoreConfigStatus{},
})), "cannot create default store config")
}
kingpin.FatalIfError(conversion.RegisterConversions(o.Provider), "Cannot initialize the webhook conversion registry")
kingpin.FatalIfError(controller.Setup_monolith(mgr, o), "Cannot setup GCP controllers")
kingpin.FatalIfError(mgr.Start(ctrl.SetupSignalHandler()), "Cannot start controller manager")
}