Initial commit

Only add very basic components

Signed-off-by: Jens Schneider <schneider@23technologies.cloud>

Makefile

@@ -0,0 +1,137 @@
+# SPDX-FileCopyrightText: 2021 SAP SE or an SAP affiliate company and Gardener contributors
+#
+# SPDX-License-Identifier: Apache-2.0
+
+EXTENSION_PREFIX            := gardener-extension
+NAME                        := mwe
+REGISTRY                    := eu.gcr.io/gardener-project/gardener
+IMAGE_PREFIX                := $(REGISTRY)/extensions
+REPO_ROOT                   := $(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))
+HACK_DIR                    := $(REPO_ROOT)/hack
+VERSION                     := $(shell cat "$(REPO_ROOT)/VERSION")
+LD_FLAGS                    := "-w $(shell $(REPO_ROOT)/vendor/github.com/gardener/gardener/hack/get-build-ld-flags.sh k8s.io/component-base $(REPO_ROOT)/VERSION $(EXTENSION_PREFIX)-$(NAME))"
+LEADER_ELECTION             := false
+IGNORE_OPERATION_ANNOTATION := true
+KUBECONFIG									:= dev/kubeconfig.yaml
+
+WEBHOOK_CONFIG_PORT	:= 8444
+WEBHOOK_CONFIG_URL	:= localhost:${WEBHOOK_CONFIG_PORT}
+EXTENSION_NAMESPACE	:=
+
+WEBHOOK_PARAM := --webhook-config-url=${WEBHOOK_CONFIG_URL}
+ifeq (${WEBHOOK_CONFIG_MODE}, service)
+  WEBHOOK_PARAM := --webhook-config-namespace=${EXTENSION_NAMESPACE}
+endif
+
+
+TOOLS_DIR := $(REPO_ROOT)/vendor/github.com/gardener/gardener/hack/tools
+include $(REPO_ROOT)/vendor/github.com/gardener/gardener/hack/tools.mk
+
+.PHONY: start
+start:
+	@LEADER_ELECTION_NAMESPACE=garden GO111MODULE=on go run \
+		-mod=vendor \
+		-ldflags $(LD_FLAGS) \
+		./cmd/$(EXTENSION_PREFIX)-$(NAME) \
+		--kubeconfig=${KUBECONFIG} \
+		--ignore-operation-annotation=$(IGNORE_OPERATION_ANNOTATION) \
+		--leader-election=$(LEADER_ELECTION) \
+		--webhook-config-server-host=localhost \
+		--webhook-config-server-port=${WEBHOOK_CONFIG_PORT} \
+		--gardener-version="v1.39.0"
+
+#################################################################
+# Rules related to binary build, Docker image build and release #
+#################################################################
+
+.PHONY: install
+install:
+	@LD_FLAGS=$(LD_FLAGS) \
+	$(REPO_ROOT)/vendor/github.com/gardener/gardener/hack/install.sh ./...
+
+.PHONY: docker-login
+docker-login:
+	@gcloud auth activate-service-account --key-file .kube-secrets/gcr/gcr-readwrite.json
+
+.PHONY: docker-images
+docker-images:
+	@docker build -t $(IMAGE_PREFIX)/$(NAME):$(VERSION) -t $(IMAGE_PREFIX)/$(NAME):latest -f Dockerfile -m 6g --target $(EXTENSION_PREFIX)-$(NAME) .
+
+#####################################################################
+# Rules for verification, formatting, linting, testing and cleaning #
+#####################################################################
+
+.PHONY: install-requirements
+install-requirements:
+	@go install -mod=vendor $(REPO_ROOT)/vendor/github.com/ahmetb/gen-crd-api-reference-docs
+	@go install -mod=vendor $(REPO_ROOT)/vendor/github.com/golang/mock/mockgen
+	@go install -mod=vendor $(REPO_ROOT)/vendor/golang.org/x/tools/cmd/goimports
+	@$(REPO_ROOT)/vendor/github.com/gardener/gardener/hack/install-requirements.sh
+
+.PHONY: revendor
+revendor:
+	@GO111MODULE=on go mod vendor
+	@GO111MODULE=on go mod tidy
+	@chmod +x $(REPO_ROOT)/vendor/github.com/gardener/gardener/hack/*
+	@chmod +x $(REPO_ROOT)/vendor/github.com/gardener/gardener/hack/.ci/*
+	@sed -i "1 s/.*/\#\!\/usr\/bin\/env bash/" $(REPO_ROOT)/vendor/github.com/gardener/gardener/hack/get-build-ld-flags.sh
+	@sed -i "1 s/.*/\#\!\/usr\/bin\/env bash/" $(REPO_ROOT)/vendor/github.com/gardener/gardener/hack/generate-controller-registration.sh
+	@sed -i "1 s/.*/\#\!\/usr\/bin\/env bash/" $(REPO_ROOT)/vendor/github.com/gardener/gardener/hack/hook-me.sh
+	@sed -i "s/host.docker.internal/172.18.0.1/" $(REPO_ROOT)/vendor/github.com/gardener/gardener/hack/hook-me.sh
+
+#	@$(REPO_ROOT)/hack/update-github-templates.sh
+
+.PHONY: clean
+clean:
+	@$(shell find ./example -type f -name "controller-registration.yaml" -exec rm '{}' \;)
+	@$(REPO_ROOT)/vendor/github.com/gardener/gardener/hack/clean.sh ./cmd/... ./pkg/... ./test/...
+
+.PHONY: check-generate
+check-generate:
+	@$(REPO_ROOT)/vendor/github.com/gardener/gardener/hack/check-generate.sh $(REPO_ROOT)
+
+# TODO: after next gardener/gardener revendoring use the docforge instance in the tools directory
+.PHONY: check-docforge
+check-docforge:
+	@./hack/check-docforge.sh
+
+.PHONY: check
+check: $(GOIMPORTS)
+	go vet ./...
+	@$(REPO_ROOT)/vendor/github.com/gardener/gardener/hack/check-charts.sh ./charts
+
+.PHONY: generate
+generate:
+	@GO111MODULE=off hack/update-codegen.sh --parallel
+	@$(REPO_ROOT)/vendor/github.com/gardener/gardener/hack/generate.sh ./charts/... ./cmd/... ./pkg/... ./test/...
+
+.PHONY: format
+format:
+	@$(REPO_ROOT)/vendor/github.com/gardener/gardener/hack/format.sh ./cmd ./pkg ./test
+
+.PHONY: test
+test:
+	@SKIP_FETCH_TOOLS=1 $(REPO_ROOT)/vendor/github.com/gardener/gardener/hack/test.sh ./cmd/... ./pkg/...
+
+.PHONY: test-cov
+test-cov:
+	@SKIP_FETCH_TOOLS=1 $(REPO_ROOT)/vendor/github.com/gardener/gardener/hack/test-cover.sh ./cmd/... ./pkg/...
+
+.PHONY: test-clean
+test-clean:
+	@$(REPO_ROOT)/vendor/github.com/gardener/gardener/hack/test-cover-clean.sh
+
+.PHONY: verify
+verify: check check-docforge format test
+
+.PHONY: verify-extended
+verify-extended: install-requirements check-generate check check-docforge format test test-cov test-clean
+
+.PHONY: get-debug-command
+get-debug-command:
+	$(info LEADER_ELECTION_NAMESPACE=garden dlv debug --build-flags "mod vendor" ./cmd/$(EXTENSION_PREFIX)-$(NAME) -- \
+		--kubeconfig=${KUBECONFIG} \
+		--ignore-operation-annotation=$(IGNORE_OPERATION_ANNOTATION) \
+		--leader-election=$(LEADER_ELECTION) \
+		--gardener-version="v1.39.0")
+	@true

cmd/gardener-extension-mwe/app/app.go

@@ -0,0 +1,86 @@
+// SPDX-FileCopyrightText: 2021 SAP SE or an SAP affiliate company and Gardener contributors
+//
+// SPDX-License-Identifier: Apache-2.0
+
+package app
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/23technologies/gardener-extension-mwe/pkg/controller/lifecycle"
+	extensionscontroller "github.com/gardener/gardener/extensions/pkg/controller"
+	"github.com/gardener/gardener/extensions/pkg/util"
+
+	"github.com/spf13/cobra"
+	corev1 "k8s.io/api/core/v1"
+	componentbaseconfig "k8s.io/component-base/config"
+	"k8s.io/component-base/version/verflag"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/manager"
+)
+
+// NewServiceControllerCommand creates a new command that is used to start the mwe controller
+func NewServiceControllerCommand() *cobra.Command {
+	options := NewOptions()
+
+	cmd := &cobra.Command{
+		Use:           "gardener-extension-mwe",
+		Short:         "Minimal working example controller does nothing special",
+		SilenceErrors: true,
+
+		RunE: func(cmd *cobra.Command, args []string) error {
+			verflag.PrintAndExitIfRequested()
+
+			if err := options.optionAggregator.Complete(); err != nil {
+				return fmt.Errorf("error completing options: %s", err)
+			}
+			cmd.SilenceUsage = true
+			return options.run(cmd.Context())
+		},
+	}
+
+	verflag.AddFlags(cmd.Flags())
+	options.optionAggregator.AddFlags(cmd.Flags())
+
+	return cmd
+}
+
+func (o *Options) run(ctx context.Context) error {
+	// TODO: Make these flags configurable via command line parameters or component config file.
+	util.ApplyClientConnectionConfigurationToRESTConfig(&componentbaseconfig.ClientConnectionConfiguration{
+		QPS:   100.0,
+		Burst: 130,
+	}, o.restOptions.Completed().Config)
+
+	mgrOpts := o.managerOptions.Completed().Options()
+
+	// do not enable a metrics server for the quick start
+	mgrOpts.MetricsBindAddress = "0"
+
+	mgrOpts.ClientDisableCacheFor = []client.Object{
+		&corev1.Secret{},    // applied for ManagedResources
+	}
+
+	mgr, err := manager.New(o.restOptions.Completed().Config, mgrOpts)
+	if err != nil {
+		return fmt.Errorf("could not instantiate controller-manager: %s", err)
+	}
+
+	if err := extensionscontroller.AddToScheme(mgr.GetScheme()); err != nil {
+		return fmt.Errorf("could not update manager scheme: %s", err)
+	}
+
+	o.controllerOptions.Completed().Apply(&lifecycle.DefaultAddOptions.ControllerOptions)
+	o.lifecycleOptions.Completed().Apply(&lifecycle.DefaultAddOptions.ControllerOptions)
+
+	if err := o.controllerSwitches.Completed().AddToManager(mgr); err != nil {
+		return fmt.Errorf("could not add controllers to manager: %s", err)
+	}
+
+	if err := mgr.Start(ctx); err != nil {
+		return fmt.Errorf("error running manager: %s", err)
+	}
+
+	return nil
+}

cmd/gardener-extension-mwe/app/options.go

@@ -0,0 +1,70 @@
+// SPDX-FileCopyrightText: 2021 SAP SE or an SAP affiliate company and Gardener contributors
+//
+// SPDX-License-Identifier: Apache-2.0
+
+package app
+
+import (
+	"os"
+
+	"github.com/23technologies/gardener-extension-mwe/pkg/controller/lifecycle"
+	controllercmd "github.com/gardener/gardener/extensions/pkg/controller/cmd"
+)
+
+// ExtensionName is the name of the extension.
+const ExtensionName = "mwe"
+
+// Options holds configuration passed to the mwe controller.
+type Options struct {
+	generalOptions     *controllercmd.GeneralOptions
+	restOptions        *controllercmd.RESTOptions
+	managerOptions     *controllercmd.ManagerOptions
+	controllerOptions  *controllercmd.ControllerOptions
+	lifecycleOptions   *controllercmd.ControllerOptions
+	healthOptions      *controllercmd.ControllerOptions
+	controllerSwitches *controllercmd.SwitchOptions
+	reconcileOptions   *controllercmd.ReconcilerOptions
+	optionAggregator   controllercmd.OptionAggregator
+}
+
+// NewOptions creates a new Options instance.
+func NewOptions() *Options {
+	options := &Options{
+		generalOptions: &controllercmd.GeneralOptions{},
+		restOptions:    &controllercmd.RESTOptions{},
+		managerOptions: &controllercmd.ManagerOptions{
+			// These are default values.
+			LeaderElection:          true,
+			LeaderElectionID:        controllercmd.LeaderElectionNameID(ExtensionName),
+			LeaderElectionNamespace: os.Getenv("LEADER_ELECTION_NAMESPACE"),
+		},
+		controllerOptions: &controllercmd.ControllerOptions{
+			// This is a default value.
+			MaxConcurrentReconciles: 5,
+		},
+		lifecycleOptions: &controllercmd.ControllerOptions{
+			// This is a default value.
+			MaxConcurrentReconciles: 5,
+		},
+		healthOptions: &controllercmd.ControllerOptions{
+			// This is a default value.
+			MaxConcurrentReconciles: 5,
+		},
+		reconcileOptions: &controllercmd.ReconcilerOptions{},
+		controllerSwitches: controllercmd.NewSwitchOptions(
+			controllercmd.Switch("mwe_lifecycle_controller", lifecycle.AddToManager)),
+	}
+
+	options.optionAggregator = controllercmd.NewOptionAggregator(
+		options.generalOptions,
+		options.restOptions,
+		options.managerOptions,
+		options.controllerOptions,
+		controllercmd.PrefixOption("lifecycle-", options.lifecycleOptions),
+		controllercmd.PrefixOption("healthcheck-", options.healthOptions),
+		options.controllerSwitches,
+		options.reconcileOptions,
+	)
+
+	return options
+}

cmd/gardener-extension-mwe/main.go

@@ -0,0 +1,24 @@
+// SPDX-FileCopyrightText: 2021 SAP SE or an SAP affiliate company and Gardener contributors
+//
+// SPDX-License-Identifier: Apache-2.0
+
+package main
+
+import (
+	"fmt"
+
+	"github.com/23technologies/gardener-extension-mwe/cmd/gardener-extension-mwe/app"
+
+	"github.com/gardener/gardener/pkg/logger"
+	runtimelog "sigs.k8s.io/controller-runtime/pkg/log"
+	"sigs.k8s.io/controller-runtime/pkg/manager/signals"
+)
+
+func main() {
+	runtimelog.SetLogger(logger.ZapLogger(false))
+
+	ctx := signals.SetupSignalHandler()
+	if err := app.NewServiceControllerCommand().ExecuteContext(ctx); err != nil {
+		fmt.Println(err)
+	}
+}

go.mod

@@ -0,0 +1,23 @@
+module github.com/23technologies/gardener-extension-mwe
+
+go 1.16
+
+require (
+	github.com/ahmetb/gen-crd-api-reference-docs v0.2.0
+	github.com/gardener/gardener v1.43.1
+	github.com/go-logr/logr v1.2.2
+	github.com/spf13/cobra v1.4.0
+	golang.org/x/tools v0.1.9
+	k8s.io/api v0.23.5
+	k8s.io/code-generator v0.23.5
+	k8s.io/component-base v0.23.5
+	sigs.k8s.io/controller-runtime v0.11.2
+)
+
+replace (
+	k8s.io/api => k8s.io/api v0.22.2
+	k8s.io/apimachinery => k8s.io/apimachinery v0.22.2
+	k8s.io/client-go => k8s.io/client-go v0.22.2
+	k8s.io/component-base => k8s.io/component-base v0.22.2
+	k8s.io/helm => k8s.io/helm v2.13.1+incompatible
+)