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gatewayprovisioner.go
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/
gatewayprovisioner.go
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// Copyright Project Contour 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"
"os"
"github.com/projectcontour/contour/internal/provisioner"
"github.com/projectcontour/contour/internal/provisioner/controller"
"github.com/projectcontour/contour/internal/provisioner/parse"
"github.com/projectcontour/contour/pkg/config"
kingpin "gopkg.in/alecthomas/kingpin.v2"
_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
"k8s.io/client-go/rest"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/manager"
)
func registerGatewayProvisioner(app *kingpin.Application) (*kingpin.CmdClause, *gatewayProvisionerConfig) {
cmd := app.Command("gateway-provisioner", "Run contour gateway provisioner.")
provisionerConfig := &gatewayProvisionerConfig{
contourImage: "ghcr.io/projectcontour/contour:main",
envoyImage: "docker.io/envoyproxy/envoy:v1.23.1",
metricsBindAddress: ":8080",
leaderElection: false,
leaderElectionID: "0d879e31.projectcontour.io",
gatewayControllerName: "projectcontour.io/gateway-controller",
}
cmd.Flag("contour-image", "The container image used for the managed Contour.").
Default(provisionerConfig.contourImage).
StringVar(&provisionerConfig.contourImage)
cmd.Flag("envoy-image", "The container image used for the managed Envoy.").
Default(provisionerConfig.envoyImage).
StringVar(&provisionerConfig.envoyImage)
cmd.Flag("metrics-addr", "The address the metric endpoint binds to. It can be set to 0 to disable serving metrics.").
Default(provisionerConfig.metricsBindAddress).
StringVar(&provisionerConfig.metricsBindAddress)
cmd.Flag("leader-election-namespace", "The namespace in which the leader election resource will be created.").
Default(config.GetenvOr("CONTOUR_PROVISIONER_NAMESPACE", "projectcontour")).
StringVar(&provisionerConfig.leaderElectionNamespace)
cmd.Flag("enable-leader-election", "Enable leader election for the gateway provisioner.").
BoolVar(&provisionerConfig.leaderElection)
cmd.Flag("gateway-controller-name", "The controller string to process GatewayClasses and Gateways for.").
Default(provisionerConfig.gatewayControllerName).
StringVar(&provisionerConfig.gatewayControllerName)
return cmd, provisionerConfig
}
type gatewayProvisionerConfig struct {
// contourImage is the container image for the Contour container(s) managed
// by the gateway provisioner.
contourImage string
// envoyImage is the container image for the Envoy container(s) managed
// by the gateway provisioner.
envoyImage string
// metricsBindAddress is the TCP address that the gateway provisioner should bind to for
// serving prometheus metrics. It can be set to "0" to disable the metrics serving.
metricsBindAddress string
// leaderElection determines whether or not to use leader election when starting
// the gateway provisioner.
leaderElection bool
// leaderElectionID determines the name of the configmap that leader election will
// use for holding the leader lock.
leaderElectionID string
// leaderElectionNamespace determines the namespace in which the leader
// election resource will be created.
leaderElectionNamespace string
// gatewayControllerName defines the controller string that this gateway provisioner instance
// will process GatewayClasses and Gateways for.
gatewayControllerName string
}
func runGatewayProvisioner(config *gatewayProvisionerConfig) {
setupLog := ctrl.Log.WithName("setup")
for _, image := range []string{config.contourImage, config.envoyImage} {
// Parse will not handle short digests.
if err := parse.Image(image); err != nil {
setupLog.Error(err, "invalid image reference", "value", image)
os.Exit(1)
}
}
setupLog.Info("using contour", "image", config.contourImage)
setupLog.Info("using envoy", "image", config.envoyImage)
mgr, err := createManager(ctrl.GetConfigOrDie(), config)
if err != nil {
setupLog.Error(err, "failed to create contour gateway provisioner")
os.Exit(1)
}
setupLog.Info("starting contour gateway provisioner")
if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
setupLog.Error(err, "failed to start contour gateway provisioner")
os.Exit(1)
}
}
// createManager creates a new manager from restConfig and provisionerConfig.
func createManager(restConfig *rest.Config, provisionerConfig *gatewayProvisionerConfig) (manager.Manager, error) {
scheme, err := provisioner.CreateScheme()
if err != nil {
return nil, fmt.Errorf("error creating runtime scheme: %w", err)
}
mgr, err := ctrl.NewManager(restConfig, manager.Options{
Scheme: scheme,
LeaderElection: provisionerConfig.leaderElection,
LeaderElectionResourceLock: "leases",
LeaderElectionID: provisionerConfig.leaderElectionID,
LeaderElectionNamespace: provisionerConfig.leaderElectionNamespace,
MetricsBindAddress: provisionerConfig.metricsBindAddress,
Logger: ctrl.Log.WithName("contour-gateway-provisioner"),
})
if err != nil {
return nil, fmt.Errorf("failed to create manager: %w", err)
}
// Create and register the controllers with the manager.
if _, err := controller.NewGatewayClassController(mgr, provisionerConfig.gatewayControllerName); err != nil {
return nil, fmt.Errorf("failed to create gatewayclass controller: %w", err)
}
if _, err := controller.NewGatewayController(mgr, provisionerConfig.gatewayControllerName, provisionerConfig.contourImage, provisionerConfig.envoyImage); err != nil {
return nil, fmt.Errorf("failed to create gateway controller: %w", err)
}
return mgr, nil
}