From 9d101d5312969d97588c02cd4d8698cf4fc2ef5a Mon Sep 17 00:00:00 2001
From: Richard Kettelerij <richard@mindloops.nl>
Date: Wed, 10 Apr 2024 13:09:57 +0200
Subject: [PATCH] feat(k8s): scaffolding with kubebuilder

kubebuilder init --domain pdok.nl --repo github.com/PDOK/uptime-operator --owner pdok.nl --project-name uptime-operator
---
 .dockerignore                                 |   3 +
 .gitignore                                    |  28 +++
 .golangci.yml                                 |  40 ++++
 Dockerfile                                    |  33 +++
 Makefile                                      | 203 +++++++++++++++++
 PROJECT                                       |  10 +
 README.md                                     | 114 ++++++++++
 cmd/main.go                                   | 137 ++++++++++++
 config/default/kustomization.yaml             | 142 ++++++++++++
 config/default/manager_auth_proxy_patch.yaml  |  39 ++++
 config/default/manager_config_patch.yaml      |  10 +
 config/manager/kustomization.yaml             |   2 +
 config/manager/manager.yaml                   | 102 +++++++++
 config/prometheus/kustomization.yaml          |   2 +
 config/prometheus/monitor.yaml                |  25 +++
 .../rbac/auth_proxy_client_clusterrole.yaml   |  16 ++
 config/rbac/auth_proxy_role.yaml              |  24 ++
 config/rbac/auth_proxy_role_binding.yaml      |  19 ++
 config/rbac/auth_proxy_service.yaml           |  21 ++
 config/rbac/kustomization.yaml                |  18 ++
 config/rbac/leader_election_role.yaml         |  44 ++++
 config/rbac/leader_election_role_binding.yaml |  19 ++
 config/rbac/role.yaml                         |  15 ++
 config/rbac/role_binding.yaml                 |  19 ++
 config/rbac/service_account.yaml              |  12 +
 go.mod                                        |  73 +++++++
 go.sum                                        | 205 ++++++++++++++++++
 hack/boilerplate.go.txt                       |  15 ++
 test/e2e/e2e_suite_test.go                    |  32 +++
 test/e2e/e2e_test.go                          | 121 +++++++++++
 test/utils/utils.go                           | 140 ++++++++++++
 31 files changed, 1683 insertions(+)
 create mode 100644 .dockerignore
 create mode 100644 .gitignore
 create mode 100644 .golangci.yml
 create mode 100644 Dockerfile
 create mode 100644 Makefile
 create mode 100644 PROJECT
 create mode 100644 README.md
 create mode 100644 cmd/main.go
 create mode 100644 config/default/kustomization.yaml
 create mode 100644 config/default/manager_auth_proxy_patch.yaml
 create mode 100644 config/default/manager_config_patch.yaml
 create mode 100644 config/manager/kustomization.yaml
 create mode 100644 config/manager/manager.yaml
 create mode 100644 config/prometheus/kustomization.yaml
 create mode 100644 config/prometheus/monitor.yaml
 create mode 100644 config/rbac/auth_proxy_client_clusterrole.yaml
 create mode 100644 config/rbac/auth_proxy_role.yaml
 create mode 100644 config/rbac/auth_proxy_role_binding.yaml
 create mode 100644 config/rbac/auth_proxy_service.yaml
 create mode 100644 config/rbac/kustomization.yaml
 create mode 100644 config/rbac/leader_election_role.yaml
 create mode 100644 config/rbac/leader_election_role_binding.yaml
 create mode 100644 config/rbac/role.yaml
 create mode 100644 config/rbac/role_binding.yaml
 create mode 100644 config/rbac/service_account.yaml
 create mode 100644 go.mod
 create mode 100644 go.sum
 create mode 100644 hack/boilerplate.go.txt
 create mode 100644 test/e2e/e2e_suite_test.go
 create mode 100644 test/e2e/e2e_test.go
 create mode 100644 test/utils/utils.go

diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..a3aab7a
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,3 @@
+# More info: https://docs.docker.com/engine/reference/builder/#dockerignore-file
+# Ignore build and test binaries.
+bin/
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..7a7feec
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,28 @@
+
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+bin/*
+Dockerfile.cross
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Go workspace file
+go.work
+
+# Kubernetes Generated files - skip generated files, except for vendored files
+!vendor/**/zz_generated.*
+
+# editor and IDE paraphernalia
+.idea
+.vscode
+*.swp
+*.swo
+*~
diff --git a/.golangci.yml b/.golangci.yml
new file mode 100644
index 0000000..aed8644
--- /dev/null
+++ b/.golangci.yml
@@ -0,0 +1,40 @@
+run:
+  deadline: 5m
+  allow-parallel-runners: true
+
+issues:
+  # don't skip warning about doc comments
+  # don't exclude the default set of lint
+  exclude-use-default: false
+  # restore some of the defaults
+  # (fill in the rest as needed)
+  exclude-rules:
+    - path: "api/*"
+      linters:
+        - lll
+    - path: "internal/*"
+      linters:
+        - dupl
+        - lll
+linters:
+  disable-all: true
+  enable:
+    - dupl
+    - errcheck
+    - exportloopref
+    - goconst
+    - gocyclo
+    - gofmt
+    - goimports
+    - gosimple
+    - govet
+    - ineffassign
+    - lll
+    - misspell
+    - nakedret
+    - prealloc
+    - staticcheck
+    - typecheck
+    - unconvert
+    - unparam
+    - unused
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..aca26f9
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,33 @@
+# Build the manager binary
+FROM golang:1.21 AS builder
+ARG TARGETOS
+ARG TARGETARCH
+
+WORKDIR /workspace
+# Copy the Go Modules manifests
+COPY go.mod go.mod
+COPY go.sum go.sum
+# cache deps before building and copying source so that we don't need to re-download as much
+# and so that source changes don't invalidate our downloaded layer
+RUN go mod download
+
+# Copy the go source
+COPY cmd/main.go cmd/main.go
+COPY api/ api/
+COPY internal/controller/ internal/controller/
+
+# Build
+# the GOARCH has not a default value to allow the binary be built according to the host where the command
+# was called. For example, if we call make docker-build in a local env which has the Apple Silicon M1 SO
+# the docker BUILDPLATFORM arg will be linux/arm64 when for Apple x86 it will be linux/amd64. Therefore,
+# by leaving it empty we can ensure that the container and binary shipped on it will have the same platform.
+RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -a -o manager cmd/main.go
+
+# Use distroless as minimal base image to package the manager binary
+# Refer to https://github.com/GoogleContainerTools/distroless for more details
+FROM gcr.io/distroless/static:nonroot
+WORKDIR /
+COPY --from=builder /workspace/manager .
+USER 65532:65532
+
+ENTRYPOINT ["/manager"]
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..39aea44
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,203 @@
+
+# Image URL to use all building/pushing image targets
+IMG ?= controller:latest
+# ENVTEST_K8S_VERSION refers to the version of kubebuilder assets to be downloaded by envtest binary.
+ENVTEST_K8S_VERSION = 1.29.0
+
+# Get the currently used golang install path (in GOPATH/bin, unless GOBIN is set)
+ifeq (,$(shell go env GOBIN))
+GOBIN=$(shell go env GOPATH)/bin
+else
+GOBIN=$(shell go env GOBIN)
+endif
+
+# CONTAINER_TOOL defines the container tool to be used for building images.
+# Be aware that the target commands are only tested with Docker which is
+# scaffolded by default. However, you might want to replace it to use other
+# tools. (i.e. podman)
+CONTAINER_TOOL ?= docker
+
+# Setting SHELL to bash allows bash commands to be executed by recipes.
+# Options are set to exit when a recipe line exits non-zero or a piped command fails.
+SHELL = /usr/bin/env bash -o pipefail
+.SHELLFLAGS = -ec
+
+.PHONY: all
+all: build
+
+##@ General
+
+# The help target prints out all targets with their descriptions organized
+# beneath their categories. The categories are represented by '##@' and the
+# target descriptions by '##'. The awk command is responsible for reading the
+# entire set of makefiles included in this invocation, looking for lines of the
+# file as xyz: ## something, and then pretty-format the target and help. Then,
+# if there's a line with ##@ something, that gets pretty-printed as a category.
+# More info on the usage of ANSI control characters for terminal formatting:
+# https://en.wikipedia.org/wiki/ANSI_escape_code#SGR_parameters
+# More info on the awk command:
+# http://linuxcommand.org/lc3_adv_awk.php
+
+.PHONY: help
+help: ## Display this help.
+	@awk 'BEGIN {FS = ":.*##"; printf "\nUsage:\n  make \033[36m<target>\033[0m\n"} /^[a-zA-Z_0-9-]+:.*?##/ { printf "  \033[36m%-15s\033[0m %s\n", $$1, $$2 } /^##@/ { printf "\n\033[1m%s\033[0m\n", substr($$0, 5) } ' $(MAKEFILE_LIST)
+
+##@ Development
+
+.PHONY: manifests
+manifests: controller-gen ## Generate WebhookConfiguration, ClusterRole and CustomResourceDefinition objects.
+	$(CONTROLLER_GEN) rbac:roleName=manager-role crd webhook paths="./..." output:crd:artifacts:config=config/crd/bases
+
+.PHONY: generate
+generate: controller-gen ## Generate code containing DeepCopy, DeepCopyInto, and DeepCopyObject method implementations.
+	$(CONTROLLER_GEN) object:headerFile="hack/boilerplate.go.txt" paths="./..."
+
+.PHONY: fmt
+fmt: ## Run go fmt against code.
+	go fmt ./...
+
+.PHONY: vet
+vet: ## Run go vet against code.
+	go vet ./...
+
+.PHONY: test
+test: manifests generate fmt vet envtest ## Run tests.
+	KUBEBUILDER_ASSETS="$(shell $(ENVTEST) use $(ENVTEST_K8S_VERSION) --bin-dir $(LOCALBIN) -p path)" go test $$(go list ./... | grep -v /e2e) -coverprofile cover.out
+
+# Utilize Kind or modify the e2e tests to load the image locally, enabling compatibility with other vendors.
+.PHONY: test-e2e  # Run the e2e tests against a Kind k8s instance that is spun up.
+test-e2e:
+	go test ./test/e2e/ -v -ginkgo.v
+
+.PHONY: lint
+lint: golangci-lint ## Run golangci-lint linter & yamllint
+	$(GOLANGCI_LINT) run
+
+.PHONY: lint-fix
+lint-fix: golangci-lint ## Run golangci-lint linter and perform fixes
+	$(GOLANGCI_LINT) run --fix
+
+##@ Build
+
+.PHONY: build
+build: manifests generate fmt vet ## Build manager binary.
+	go build -o bin/manager cmd/main.go
+
+.PHONY: run
+run: manifests generate fmt vet ## Run a controller from your host.
+	go run ./cmd/main.go
+
+# If you wish to build the manager image targeting other platforms you can use the --platform flag.
+# (i.e. docker build --platform linux/arm64). However, you must enable docker buildKit for it.
+# More info: https://docs.docker.com/develop/develop-images/build_enhancements/
+.PHONY: docker-build
+docker-build: ## Build docker image with the manager.
+	$(CONTAINER_TOOL) build -t ${IMG} .
+
+.PHONY: docker-push
+docker-push: ## Push docker image with the manager.
+	$(CONTAINER_TOOL) push ${IMG}
+
+# PLATFORMS defines the target platforms for the manager image be built to provide support to multiple
+# architectures. (i.e. make docker-buildx IMG=myregistry/mypoperator:0.0.1). To use this option you need to:
+# - be able to use docker buildx. More info: https://docs.docker.com/build/buildx/
+# - have enabled BuildKit. More info: https://docs.docker.com/develop/develop-images/build_enhancements/
+# - be able to push the image to your registry (i.e. if you do not set a valid value via IMG=<myregistry/image:<tag>> then the export will fail)
+# To adequately provide solutions that are compatible with multiple platforms, you should consider using this option.
+PLATFORMS ?= linux/arm64,linux/amd64,linux/s390x,linux/ppc64le
+.PHONY: docker-buildx
+docker-buildx: ## Build and push docker image for the manager for cross-platform support
+	# copy existing Dockerfile and insert --platform=${BUILDPLATFORM} into Dockerfile.cross, and preserve the original Dockerfile
+	sed -e '1 s/\(^FROM\)/FROM --platform=\$$\{BUILDPLATFORM\}/; t' -e ' 1,// s//FROM --platform=\$$\{BUILDPLATFORM\}/' Dockerfile > Dockerfile.cross
+	- $(CONTAINER_TOOL) buildx create --name project-v3-builder
+	$(CONTAINER_TOOL) buildx use project-v3-builder
+	- $(CONTAINER_TOOL) buildx build --push --platform=$(PLATFORMS) --tag ${IMG} -f Dockerfile.cross .
+	- $(CONTAINER_TOOL) buildx rm project-v3-builder
+	rm Dockerfile.cross
+
+.PHONY: build-installer
+build-installer: manifests generate kustomize ## Generate a consolidated YAML with CRDs and deployment.
+	mkdir -p dist
+	@if [ -d "config/crd" ]; then \
+		$(KUSTOMIZE) build config/crd > dist/install.yaml; \
+	fi
+	echo "---" >> dist/install.yaml  # Add a document separator before appending
+	cd config/manager && $(KUSTOMIZE) edit set image controller=${IMG}
+	$(KUSTOMIZE) build config/default >> dist/install.yaml
+
+##@ Deployment
+
+ifndef ignore-not-found
+  ignore-not-found = false
+endif
+
+.PHONY: install
+install: manifests kustomize ## Install CRDs into the K8s cluster specified in ~/.kube/config.
+	$(KUSTOMIZE) build config/crd | $(KUBECTL) apply -f -
+
+.PHONY: uninstall
+uninstall: manifests kustomize ## Uninstall CRDs from the K8s cluster specified in ~/.kube/config. Call with ignore-not-found=true to ignore resource not found errors during deletion.
+	$(KUSTOMIZE) build config/crd | $(KUBECTL) delete --ignore-not-found=$(ignore-not-found) -f -
+
+.PHONY: deploy
+deploy: manifests kustomize ## Deploy controller to the K8s cluster specified in ~/.kube/config.
+	cd config/manager && $(KUSTOMIZE) edit set image controller=${IMG}
+	$(KUSTOMIZE) build config/default | $(KUBECTL) apply -f -
+
+.PHONY: undeploy
+undeploy: kustomize ## Undeploy controller from the K8s cluster specified in ~/.kube/config. Call with ignore-not-found=true to ignore resource not found errors during deletion.
+	$(KUSTOMIZE) build config/default | $(KUBECTL) delete --ignore-not-found=$(ignore-not-found) -f -
+
+##@ Dependencies
+
+## Location to install dependencies to
+LOCALBIN ?= $(shell pwd)/bin
+$(LOCALBIN):
+	mkdir -p $(LOCALBIN)
+
+## Tool Binaries
+KUBECTL ?= kubectl
+KUSTOMIZE ?= $(LOCALBIN)/kustomize-$(KUSTOMIZE_VERSION)
+CONTROLLER_GEN ?= $(LOCALBIN)/controller-gen-$(CONTROLLER_TOOLS_VERSION)
+ENVTEST ?= $(LOCALBIN)/setup-envtest-$(ENVTEST_VERSION)
+GOLANGCI_LINT = $(LOCALBIN)/golangci-lint-$(GOLANGCI_LINT_VERSION)
+
+## Tool Versions
+KUSTOMIZE_VERSION ?= v5.3.0
+CONTROLLER_TOOLS_VERSION ?= v0.14.0
+ENVTEST_VERSION ?= latest
+GOLANGCI_LINT_VERSION ?= v1.54.2
+
+.PHONY: kustomize
+kustomize: $(KUSTOMIZE) ## Download kustomize locally if necessary.
+$(KUSTOMIZE): $(LOCALBIN)
+	$(call go-install-tool,$(KUSTOMIZE),sigs.k8s.io/kustomize/kustomize/v5,$(KUSTOMIZE_VERSION))
+
+.PHONY: controller-gen
+controller-gen: $(CONTROLLER_GEN) ## Download controller-gen locally if necessary.
+$(CONTROLLER_GEN): $(LOCALBIN)
+	$(call go-install-tool,$(CONTROLLER_GEN),sigs.k8s.io/controller-tools/cmd/controller-gen,$(CONTROLLER_TOOLS_VERSION))
+
+.PHONY: envtest
+envtest: $(ENVTEST) ## Download setup-envtest locally if necessary.
+$(ENVTEST): $(LOCALBIN)
+	$(call go-install-tool,$(ENVTEST),sigs.k8s.io/controller-runtime/tools/setup-envtest,$(ENVTEST_VERSION))
+
+.PHONY: golangci-lint
+golangci-lint: $(GOLANGCI_LINT) ## Download golangci-lint locally if necessary.
+$(GOLANGCI_LINT): $(LOCALBIN)
+	$(call go-install-tool,$(GOLANGCI_LINT),github.com/golangci/golangci-lint/cmd/golangci-lint,${GOLANGCI_LINT_VERSION})
+
+# go-install-tool will 'go install' any package with custom target and name of binary, if it doesn't exist
+# $1 - target path with name of binary (ideally with version)
+# $2 - package url which can be installed
+# $3 - specific version of package
+define go-install-tool
+@[ -f $(1) ] || { \
+set -e; \
+package=$(2)@$(3) ;\
+echo "Downloading $${package}" ;\
+GOBIN=$(LOCALBIN) go install $${package} ;\
+mv "$$(echo "$(1)" | sed "s/-$(3)$$//")" $(1) ;\
+}
+endef
diff --git a/PROJECT b/PROJECT
new file mode 100644
index 0000000..6b3e951
--- /dev/null
+++ b/PROJECT
@@ -0,0 +1,10 @@
+# Code generated by tool. DO NOT EDIT.
+# This file is used to track the info used to scaffold your project
+# and allow the plugins properly work.
+# More info: https://book.kubebuilder.io/reference/project-config.html
+domain: pdok.nl
+layout:
+- go.kubebuilder.io/v4
+projectName: uptime-operator
+repo: github.com/PDOK/uptime-operator
+version: "3"
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..8361be5
--- /dev/null
+++ b/README.md
@@ -0,0 +1,114 @@
+# uptime-operator
+// TODO(user): Add simple overview of use/purpose
+
+## Description
+// TODO(user): An in-depth paragraph about your project and overview of use
+
+## Getting Started
+
+### Prerequisites
+- go version v1.21.0+
+- docker version 17.03+.
+- kubectl version v1.11.3+.
+- Access to a Kubernetes v1.11.3+ cluster.
+
+### To Deploy on the cluster
+**Build and push your image to the location specified by `IMG`:**
+
+```sh
+make docker-build docker-push IMG=<some-registry>/uptime-operator:tag
+```
+
+**NOTE:** This image ought to be published in the personal registry you specified. 
+And it is required to have access to pull the image from the working environment. 
+Make sure you have the proper permission to the registry if the above commands don’t work.
+
+**Install the CRDs into the cluster:**
+
+```sh
+make install
+```
+
+**Deploy the Manager to the cluster with the image specified by `IMG`:**
+
+```sh
+make deploy IMG=<some-registry>/uptime-operator:tag
+```
+
+> **NOTE**: If you encounter RBAC errors, you may need to grant yourself cluster-admin 
+privileges or be logged in as admin.
+
+**Create instances of your solution**
+You can apply the samples (examples) from the config/sample:
+
+```sh
+kubectl apply -k config/samples/
+```
+
+>**NOTE**: Ensure that the samples has default values to test it out.
+
+### To Uninstall
+**Delete the instances (CRs) from the cluster:**
+
+```sh
+kubectl delete -k config/samples/
+```
+
+**Delete the APIs(CRDs) from the cluster:**
+
+```sh
+make uninstall
+```
+
+**UnDeploy the controller from the cluster:**
+
+```sh
+make undeploy
+```
+
+## Project Distribution
+
+Following are the steps to build the installer and distribute this project to users.
+
+1. Build the installer for the image built and published in the registry:
+
+```sh
+make build-installer IMG=<some-registry>/uptime-operator:tag
+```
+
+NOTE: The makefile target mentioned above generates an 'install.yaml'
+file in the dist directory. This file contains all the resources built
+with Kustomize, which are necessary to install this project without
+its dependencies.
+
+2. Using the installer
+
+Users can just run kubectl apply -f <URL for YAML BUNDLE> to install the project, i.e.:
+
+```sh
+kubectl apply -f https://raw.githubusercontent.com/<org>/uptime-operator/<tag or branch>/dist/install.yaml
+```
+
+## Contributing
+// TODO(user): Add detailed information on how you would like others to contribute to this project
+
+**NOTE:** Run `make help` for more information on all potential `make` targets
+
+More information can be found via the [Kubebuilder Documentation](https://book.kubebuilder.io/introduction.html)
+
+## License
+
+Copyright 2024 pdok.nl.
+
+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.
+
diff --git a/cmd/main.go b/cmd/main.go
new file mode 100644
index 0000000..7c8fcc4
--- /dev/null
+++ b/cmd/main.go
@@ -0,0 +1,137 @@
+/*
+Copyright 2024 pdok.nl.
+
+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 (
+	"crypto/tls"
+	"flag"
+	"os"
+
+	// Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.)
+	// to ensure that exec-entrypoint and run can make use of them.
+	_ "k8s.io/client-go/plugin/pkg/client/auth"
+
+	"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"
+	"sigs.k8s.io/controller-runtime/pkg/healthz"
+	"sigs.k8s.io/controller-runtime/pkg/log/zap"
+	metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server"
+	"sigs.k8s.io/controller-runtime/pkg/webhook"
+	//+kubebuilder:scaffold:imports
+)
+
+var (
+	scheme   = runtime.NewScheme()
+	setupLog = ctrl.Log.WithName("setup")
+)
+
+func init() {
+	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
+
+	//+kubebuilder:scaffold:scheme
+}
+
+func main() {
+	var metricsAddr string
+	var enableLeaderElection bool
+	var probeAddr string
+	var secureMetrics bool
+	var enableHTTP2 bool
+	flag.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "The address the metric endpoint binds to.")
+	flag.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to.")
+	flag.BoolVar(&enableLeaderElection, "leader-elect", false,
+		"Enable leader election for controller manager. "+
+			"Enabling this will ensure there is only one active controller manager.")
+	flag.BoolVar(&secureMetrics, "metrics-secure", false,
+		"If set the metrics endpoint is served securely")
+	flag.BoolVar(&enableHTTP2, "enable-http2", false,
+		"If set, HTTP/2 will be enabled for the metrics and webhook servers")
+	opts := zap.Options{
+		Development: true,
+	}
+	opts.BindFlags(flag.CommandLine)
+	flag.Parse()
+
+	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
+
+	// if the enable-http2 flag is false (the default), http/2 should be disabled
+	// due to its vulnerabilities. More specifically, disabling http/2 will
+	// prevent from being vulnerable to the HTTP/2 Stream Cancelation and
+	// Rapid Reset CVEs. For more information see:
+	// - https://github.com/advisories/GHSA-qppj-fm5r-hxr3
+	// - https://github.com/advisories/GHSA-4374-p667-p6c8
+	disableHTTP2 := func(c *tls.Config) {
+		setupLog.Info("disabling http/2")
+		c.NextProtos = []string{"http/1.1"}
+	}
+
+	tlsOpts := []func(*tls.Config){}
+	if !enableHTTP2 {
+		tlsOpts = append(tlsOpts, disableHTTP2)
+	}
+
+	webhookServer := webhook.NewServer(webhook.Options{
+		TLSOpts: tlsOpts,
+	})
+
+	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
+		Scheme: scheme,
+		Metrics: metricsserver.Options{
+			BindAddress:   metricsAddr,
+			SecureServing: secureMetrics,
+			TLSOpts:       tlsOpts,
+		},
+		WebhookServer:          webhookServer,
+		HealthProbeBindAddress: probeAddr,
+		LeaderElection:         enableLeaderElection,
+		LeaderElectionID:       "ce3b4f94.pdok.nl",
+		// LeaderElectionReleaseOnCancel defines if the leader should step down voluntarily
+		// when the Manager ends. This requires the binary to immediately end when the
+		// Manager is stopped, otherwise, this setting is unsafe. Setting this significantly
+		// speeds up voluntary leader transitions as the new leader don't have to wait
+		// LeaseDuration time first.
+		//
+		// In the default scaffold provided, the program ends immediately after
+		// the manager stops, so would be fine to enable this option. However,
+		// if you are doing or is intended to do any operation such as perform cleanups
+		// after the manager stops then its usage might be unsafe.
+		// LeaderElectionReleaseOnCancel: true,
+	})
+	if err != nil {
+		setupLog.Error(err, "unable to start manager")
+		os.Exit(1)
+	}
+
+	//+kubebuilder:scaffold:builder
+
+	if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil {
+		setupLog.Error(err, "unable to set up health check")
+		os.Exit(1)
+	}
+	if err := mgr.AddReadyzCheck("readyz", healthz.Ping); err != nil {
+		setupLog.Error(err, "unable to set up ready check")
+		os.Exit(1)
+	}
+
+	setupLog.Info("starting manager")
+	if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
+		setupLog.Error(err, "problem running manager")
+		os.Exit(1)
+	}
+}
diff --git a/config/default/kustomization.yaml b/config/default/kustomization.yaml
new file mode 100644
index 0000000..f2f0fd0
--- /dev/null
+++ b/config/default/kustomization.yaml
@@ -0,0 +1,142 @@
+# Adds namespace to all resources.
+namespace: uptime-operator-system
+
+# Value of this field is prepended to the
+# names of all resources, e.g. a deployment named
+# "wordpress" becomes "alices-wordpress".
+# Note that it should also match with the prefix (text before '-') of the namespace
+# field above.
+namePrefix: uptime-operator-
+
+# Labels to add to all resources and selectors.
+#labels:
+#- includeSelectors: true
+#  pairs:
+#    someName: someValue
+
+resources:
+#- ../crd
+- ../rbac
+- ../manager
+# [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix including the one in
+# crd/kustomization.yaml
+#- ../webhook
+# [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER'. 'WEBHOOK' components are required.
+#- ../certmanager
+# [PROMETHEUS] To enable prometheus monitor, uncomment all sections with 'PROMETHEUS'.
+#- ../prometheus
+
+patches:
+# Protect the /metrics endpoint by putting it behind auth.
+# If you want your controller-manager to expose the /metrics
+# endpoint w/o any authn/z, please comment the following line.
+- path: manager_auth_proxy_patch.yaml
+
+# [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix including the one in
+# crd/kustomization.yaml
+#- path: manager_webhook_patch.yaml
+
+# [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER'.
+# Uncomment 'CERTMANAGER' sections in crd/kustomization.yaml to enable the CA injection in the admission webhooks.
+# 'CERTMANAGER' needs to be enabled to use ca injection
+#- path: webhookcainjection_patch.yaml
+
+# [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER' prefix.
+# Uncomment the following replacements to add the cert-manager CA injection annotations
+#replacements:
+#  - source: # Add cert-manager annotation to ValidatingWebhookConfiguration, MutatingWebhookConfiguration and CRDs
+#      kind: Certificate
+#      group: cert-manager.io
+#      version: v1
+#      name: serving-cert # this name should match the one in certificate.yaml
+#      fieldPath: .metadata.namespace # namespace of the certificate CR
+#    targets:
+#      - select:
+#          kind: ValidatingWebhookConfiguration
+#        fieldPaths:
+#          - .metadata.annotations.[cert-manager.io/inject-ca-from]
+#        options:
+#          delimiter: '/'
+#          index: 0
+#          create: true
+#      - select:
+#          kind: MutatingWebhookConfiguration
+#        fieldPaths:
+#          - .metadata.annotations.[cert-manager.io/inject-ca-from]
+#        options:
+#          delimiter: '/'
+#          index: 0
+#          create: true
+#      - select:
+#          kind: CustomResourceDefinition
+#        fieldPaths:
+#          - .metadata.annotations.[cert-manager.io/inject-ca-from]
+#        options:
+#          delimiter: '/'
+#          index: 0
+#          create: true
+#  - source:
+#      kind: Certificate
+#      group: cert-manager.io
+#      version: v1
+#      name: serving-cert # this name should match the one in certificate.yaml
+#      fieldPath: .metadata.name
+#    targets:
+#      - select:
+#          kind: ValidatingWebhookConfiguration
+#        fieldPaths:
+#          - .metadata.annotations.[cert-manager.io/inject-ca-from]
+#        options:
+#          delimiter: '/'
+#          index: 1
+#          create: true
+#      - select:
+#          kind: MutatingWebhookConfiguration
+#        fieldPaths:
+#          - .metadata.annotations.[cert-manager.io/inject-ca-from]
+#        options:
+#          delimiter: '/'
+#          index: 1
+#          create: true
+#      - select:
+#          kind: CustomResourceDefinition
+#        fieldPaths:
+#          - .metadata.annotations.[cert-manager.io/inject-ca-from]
+#        options:
+#          delimiter: '/'
+#          index: 1
+#          create: true
+#  - source: # Add cert-manager annotation to the webhook Service
+#      kind: Service
+#      version: v1
+#      name: webhook-service
+#      fieldPath: .metadata.name # namespace of the service
+#    targets:
+#      - select:
+#          kind: Certificate
+#          group: cert-manager.io
+#          version: v1
+#        fieldPaths:
+#          - .spec.dnsNames.0
+#          - .spec.dnsNames.1
+#        options:
+#          delimiter: '.'
+#          index: 0
+#          create: true
+#  - source:
+#      kind: Service
+#      version: v1
+#      name: webhook-service
+#      fieldPath: .metadata.namespace # namespace of the service
+#    targets:
+#      - select:
+#          kind: Certificate
+#          group: cert-manager.io
+#          version: v1
+#        fieldPaths:
+#          - .spec.dnsNames.0
+#          - .spec.dnsNames.1
+#        options:
+#          delimiter: '.'
+#          index: 1
+#          create: true
diff --git a/config/default/manager_auth_proxy_patch.yaml b/config/default/manager_auth_proxy_patch.yaml
new file mode 100644
index 0000000..70c3437
--- /dev/null
+++ b/config/default/manager_auth_proxy_patch.yaml
@@ -0,0 +1,39 @@
+# This patch inject a sidecar container which is a HTTP proxy for the
+# controller manager, it performs RBAC authorization against the Kubernetes API using SubjectAccessReviews.
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: controller-manager
+  namespace: system
+spec:
+  template:
+    spec:
+      containers:
+      - name: kube-rbac-proxy
+        securityContext:
+          allowPrivilegeEscalation: false
+          capabilities:
+            drop:
+            - "ALL"
+        image: gcr.io/kubebuilder/kube-rbac-proxy:v0.15.0
+        args:
+        - "--secure-listen-address=0.0.0.0:8443"
+        - "--upstream=http://127.0.0.1:8080/"
+        - "--logtostderr=true"
+        - "--v=0"
+        ports:
+        - containerPort: 8443
+          protocol: TCP
+          name: https
+        resources:
+          limits:
+            cpu: 500m
+            memory: 128Mi
+          requests:
+            cpu: 5m
+            memory: 64Mi
+      - name: manager
+        args:
+        - "--health-probe-bind-address=:8081"
+        - "--metrics-bind-address=127.0.0.1:8080"
+        - "--leader-elect"
diff --git a/config/default/manager_config_patch.yaml b/config/default/manager_config_patch.yaml
new file mode 100644
index 0000000..f6f5891
--- /dev/null
+++ b/config/default/manager_config_patch.yaml
@@ -0,0 +1,10 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: controller-manager
+  namespace: system
+spec:
+  template:
+    spec:
+      containers:
+      - name: manager
diff --git a/config/manager/kustomization.yaml b/config/manager/kustomization.yaml
new file mode 100644
index 0000000..5c5f0b8
--- /dev/null
+++ b/config/manager/kustomization.yaml
@@ -0,0 +1,2 @@
+resources:
+- manager.yaml
diff --git a/config/manager/manager.yaml b/config/manager/manager.yaml
new file mode 100644
index 0000000..5bb852b
--- /dev/null
+++ b/config/manager/manager.yaml
@@ -0,0 +1,102 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  labels:
+    control-plane: controller-manager
+    app.kubernetes.io/name: namespace
+    app.kubernetes.io/instance: system
+    app.kubernetes.io/component: manager
+    app.kubernetes.io/created-by: uptime-operator
+    app.kubernetes.io/part-of: uptime-operator
+    app.kubernetes.io/managed-by: kustomize
+  name: system
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: controller-manager
+  namespace: system
+  labels:
+    control-plane: controller-manager
+    app.kubernetes.io/name: deployment
+    app.kubernetes.io/instance: controller-manager
+    app.kubernetes.io/component: manager
+    app.kubernetes.io/created-by: uptime-operator
+    app.kubernetes.io/part-of: uptime-operator
+    app.kubernetes.io/managed-by: kustomize
+spec:
+  selector:
+    matchLabels:
+      control-plane: controller-manager
+  replicas: 1
+  template:
+    metadata:
+      annotations:
+        kubectl.kubernetes.io/default-container: manager
+      labels:
+        control-plane: controller-manager
+    spec:
+      # TODO(user): Uncomment the following code to configure the nodeAffinity expression
+      # according to the platforms which are supported by your solution.
+      # It is considered best practice to support multiple architectures. You can
+      # build your manager image using the makefile target docker-buildx.
+      # affinity:
+      #   nodeAffinity:
+      #     requiredDuringSchedulingIgnoredDuringExecution:
+      #       nodeSelectorTerms:
+      #         - matchExpressions:
+      #           - key: kubernetes.io/arch
+      #             operator: In
+      #             values:
+      #               - amd64
+      #               - arm64
+      #               - ppc64le
+      #               - s390x
+      #           - key: kubernetes.io/os
+      #             operator: In
+      #             values:
+      #               - linux
+      securityContext:
+        runAsNonRoot: true
+        # TODO(user): For common cases that do not require escalating privileges
+        # it is recommended to ensure that all your Pods/Containers are restrictive.
+        # More info: https://kubernetes.io/docs/concepts/security/pod-security-standards/#restricted
+        # Please uncomment the following code if your project does NOT have to work on old Kubernetes
+        # versions < 1.19 or on vendors versions which do NOT support this field by default (i.e. Openshift < 4.11 ).
+        # seccompProfile:
+        #   type: RuntimeDefault
+      containers:
+      - command:
+        - /manager
+        args:
+        - --leader-elect
+        image: controller:latest
+        name: manager
+        securityContext:
+          allowPrivilegeEscalation: false
+          capabilities:
+            drop:
+            - "ALL"
+        livenessProbe:
+          httpGet:
+            path: /healthz
+            port: 8081
+          initialDelaySeconds: 15
+          periodSeconds: 20
+        readinessProbe:
+          httpGet:
+            path: /readyz
+            port: 8081
+          initialDelaySeconds: 5
+          periodSeconds: 10
+        # TODO(user): Configure the resources accordingly based on the project requirements.
+        # More info: https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/
+        resources:
+          limits:
+            cpu: 500m
+            memory: 128Mi
+          requests:
+            cpu: 10m
+            memory: 64Mi
+      serviceAccountName: controller-manager
+      terminationGracePeriodSeconds: 10
diff --git a/config/prometheus/kustomization.yaml b/config/prometheus/kustomization.yaml
new file mode 100644
index 0000000..ed13716
--- /dev/null
+++ b/config/prometheus/kustomization.yaml
@@ -0,0 +1,2 @@
+resources:
+- monitor.yaml
diff --git a/config/prometheus/monitor.yaml b/config/prometheus/monitor.yaml
new file mode 100644
index 0000000..753895e
--- /dev/null
+++ b/config/prometheus/monitor.yaml
@@ -0,0 +1,25 @@
+# Prometheus Monitor Service (Metrics)
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  labels:
+    control-plane: controller-manager
+    app.kubernetes.io/name: servicemonitor
+    app.kubernetes.io/instance: controller-manager-metrics-monitor
+    app.kubernetes.io/component: metrics
+    app.kubernetes.io/created-by: uptime-operator
+    app.kubernetes.io/part-of: uptime-operator
+    app.kubernetes.io/managed-by: kustomize
+  name: controller-manager-metrics-monitor
+  namespace: system
+spec:
+  endpoints:
+    - path: /metrics
+      port: https
+      scheme: https
+      bearerTokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token
+      tlsConfig:
+        insecureSkipVerify: true
+  selector:
+    matchLabels:
+      control-plane: controller-manager
diff --git a/config/rbac/auth_proxy_client_clusterrole.yaml b/config/rbac/auth_proxy_client_clusterrole.yaml
new file mode 100644
index 0000000..7711f4d
--- /dev/null
+++ b/config/rbac/auth_proxy_client_clusterrole.yaml
@@ -0,0 +1,16 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  labels:
+    app.kubernetes.io/name: clusterrole
+    app.kubernetes.io/instance: metrics-reader
+    app.kubernetes.io/component: kube-rbac-proxy
+    app.kubernetes.io/created-by: uptime-operator
+    app.kubernetes.io/part-of: uptime-operator
+    app.kubernetes.io/managed-by: kustomize
+  name: metrics-reader
+rules:
+- nonResourceURLs:
+  - "/metrics"
+  verbs:
+  - get
diff --git a/config/rbac/auth_proxy_role.yaml b/config/rbac/auth_proxy_role.yaml
new file mode 100644
index 0000000..54c7400
--- /dev/null
+++ b/config/rbac/auth_proxy_role.yaml
@@ -0,0 +1,24 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  labels:
+    app.kubernetes.io/name: clusterrole
+    app.kubernetes.io/instance: proxy-role
+    app.kubernetes.io/component: kube-rbac-proxy
+    app.kubernetes.io/created-by: uptime-operator
+    app.kubernetes.io/part-of: uptime-operator
+    app.kubernetes.io/managed-by: kustomize
+  name: proxy-role
+rules:
+- apiGroups:
+  - authentication.k8s.io
+  resources:
+  - tokenreviews
+  verbs:
+  - create
+- apiGroups:
+  - authorization.k8s.io
+  resources:
+  - subjectaccessreviews
+  verbs:
+  - create
diff --git a/config/rbac/auth_proxy_role_binding.yaml b/config/rbac/auth_proxy_role_binding.yaml
new file mode 100644
index 0000000..069951e
--- /dev/null
+++ b/config/rbac/auth_proxy_role_binding.yaml
@@ -0,0 +1,19 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  labels:
+    app.kubernetes.io/name: clusterrolebinding
+    app.kubernetes.io/instance: proxy-rolebinding
+    app.kubernetes.io/component: kube-rbac-proxy
+    app.kubernetes.io/created-by: uptime-operator
+    app.kubernetes.io/part-of: uptime-operator
+    app.kubernetes.io/managed-by: kustomize
+  name: proxy-rolebinding
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: proxy-role
+subjects:
+- kind: ServiceAccount
+  name: controller-manager
+  namespace: system
diff --git a/config/rbac/auth_proxy_service.yaml b/config/rbac/auth_proxy_service.yaml
new file mode 100644
index 0000000..44cffab
--- /dev/null
+++ b/config/rbac/auth_proxy_service.yaml
@@ -0,0 +1,21 @@
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    control-plane: controller-manager
+    app.kubernetes.io/name: service
+    app.kubernetes.io/instance: controller-manager-metrics-service
+    app.kubernetes.io/component: kube-rbac-proxy
+    app.kubernetes.io/created-by: uptime-operator
+    app.kubernetes.io/part-of: uptime-operator
+    app.kubernetes.io/managed-by: kustomize
+  name: controller-manager-metrics-service
+  namespace: system
+spec:
+  ports:
+  - name: https
+    port: 8443
+    protocol: TCP
+    targetPort: https
+  selector:
+    control-plane: controller-manager
diff --git a/config/rbac/kustomization.yaml b/config/rbac/kustomization.yaml
new file mode 100644
index 0000000..731832a
--- /dev/null
+++ b/config/rbac/kustomization.yaml
@@ -0,0 +1,18 @@
+resources:
+# All RBAC will be applied under this service account in
+# the deployment namespace. You may comment out this resource
+# if your manager will use a service account that exists at
+# runtime. Be sure to update RoleBinding and ClusterRoleBinding
+# subjects if changing service account names.
+- service_account.yaml
+- role.yaml
+- role_binding.yaml
+- leader_election_role.yaml
+- leader_election_role_binding.yaml
+# Comment the following 4 lines if you want to disable
+# the auth proxy (https://github.com/brancz/kube-rbac-proxy)
+# which protects your /metrics endpoint.
+- auth_proxy_service.yaml
+- auth_proxy_role.yaml
+- auth_proxy_role_binding.yaml
+- auth_proxy_client_clusterrole.yaml
diff --git a/config/rbac/leader_election_role.yaml b/config/rbac/leader_election_role.yaml
new file mode 100644
index 0000000..ee8b05d
--- /dev/null
+++ b/config/rbac/leader_election_role.yaml
@@ -0,0 +1,44 @@
+# permissions to do leader election.
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  labels:
+    app.kubernetes.io/name: role
+    app.kubernetes.io/instance: leader-election-role
+    app.kubernetes.io/component: rbac
+    app.kubernetes.io/created-by: uptime-operator
+    app.kubernetes.io/part-of: uptime-operator
+    app.kubernetes.io/managed-by: kustomize
+  name: leader-election-role
+rules:
+- apiGroups:
+  - ""
+  resources:
+  - configmaps
+  verbs:
+  - get
+  - list
+  - watch
+  - create
+  - update
+  - patch
+  - delete
+- apiGroups:
+  - coordination.k8s.io
+  resources:
+  - leases
+  verbs:
+  - get
+  - list
+  - watch
+  - create
+  - update
+  - patch
+  - delete
+- apiGroups:
+  - ""
+  resources:
+  - events
+  verbs:
+  - create
+  - patch
diff --git a/config/rbac/leader_election_role_binding.yaml b/config/rbac/leader_election_role_binding.yaml
new file mode 100644
index 0000000..6ccc085
--- /dev/null
+++ b/config/rbac/leader_election_role_binding.yaml
@@ -0,0 +1,19 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  labels:
+    app.kubernetes.io/name: rolebinding
+    app.kubernetes.io/instance: leader-election-rolebinding
+    app.kubernetes.io/component: rbac
+    app.kubernetes.io/created-by: uptime-operator
+    app.kubernetes.io/part-of: uptime-operator
+    app.kubernetes.io/managed-by: kustomize
+  name: leader-election-rolebinding
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: leader-election-role
+subjects:
+- kind: ServiceAccount
+  name: controller-manager
+  namespace: system
diff --git a/config/rbac/role.yaml b/config/rbac/role.yaml
new file mode 100644
index 0000000..bc070bb
--- /dev/null
+++ b/config/rbac/role.yaml
@@ -0,0 +1,15 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  labels:
+    app.kubernetes.io/name: clusterrole
+    app.kubernetes.io/instance: manager-role
+    app.kubernetes.io/component: rbac
+    app.kubernetes.io/created-by: uptime-operator
+    app.kubernetes.io/part-of: uptime-operator
+    app.kubernetes.io/managed-by: kustomize
+  name: manager-role
+rules:
+- apiGroups: [""]
+  resources: ["pods"]
+  verbs: ["get", "list", "watch"]
diff --git a/config/rbac/role_binding.yaml b/config/rbac/role_binding.yaml
new file mode 100644
index 0000000..5baa26a
--- /dev/null
+++ b/config/rbac/role_binding.yaml
@@ -0,0 +1,19 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  labels:
+    app.kubernetes.io/name: clusterrolebinding
+    app.kubernetes.io/instance: manager-rolebinding
+    app.kubernetes.io/component: rbac
+    app.kubernetes.io/created-by: uptime-operator
+    app.kubernetes.io/part-of: uptime-operator
+    app.kubernetes.io/managed-by: kustomize
+  name: manager-rolebinding
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: manager-role
+subjects:
+- kind: ServiceAccount
+  name: controller-manager
+  namespace: system
diff --git a/config/rbac/service_account.yaml b/config/rbac/service_account.yaml
new file mode 100644
index 0000000..37b4a28
--- /dev/null
+++ b/config/rbac/service_account.yaml
@@ -0,0 +1,12 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  labels:
+    app.kubernetes.io/name: serviceaccount
+    app.kubernetes.io/instance: controller-manager-sa
+    app.kubernetes.io/component: rbac
+    app.kubernetes.io/created-by: uptime-operator
+    app.kubernetes.io/part-of: uptime-operator
+    app.kubernetes.io/managed-by: kustomize
+  name: controller-manager
+  namespace: system
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..5eb860f
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,73 @@
+module github.com/PDOK/uptime-operator
+
+go 1.21
+
+require (
+	github.com/onsi/ginkgo/v2 v2.14.0
+	github.com/onsi/gomega v1.30.0
+	k8s.io/apimachinery v0.29.0
+	k8s.io/client-go v0.29.0
+	sigs.k8s.io/controller-runtime v0.17.0
+)
+
+require (
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/emicklei/go-restful/v3 v3.11.0 // indirect
+	github.com/evanphx/json-patch/v5 v5.8.0 // indirect
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
+	github.com/go-logr/logr v1.4.1 // indirect
+	github.com/go-logr/zapr v1.3.0 // indirect
+	github.com/go-openapi/jsonpointer v0.19.6 // indirect
+	github.com/go-openapi/jsonreference v0.20.2 // indirect
+	github.com/go-openapi/swag v0.22.3 // indirect
+	github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/google/gnostic-models v0.6.8 // indirect
+	github.com/google/go-cmp v0.6.0 // indirect
+	github.com/google/gofuzz v1.2.0 // indirect
+	github.com/google/pprof v0.0.0-20210720184732-4bb14d4b1be1 // indirect
+	github.com/google/uuid v1.3.0 // indirect
+	github.com/imdario/mergo v0.3.6 // indirect
+	github.com/josharian/intern v1.0.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/prometheus/client_golang v1.18.0 // indirect
+	github.com/prometheus/client_model v0.5.0 // indirect
+	github.com/prometheus/common v0.45.0 // indirect
+	github.com/prometheus/procfs v0.12.0 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+	go.uber.org/multierr v1.11.0 // indirect
+	go.uber.org/zap v1.26.0 // indirect
+	golang.org/x/exp v0.0.0-20220722155223-a9213eeb770e // indirect
+	golang.org/x/net v0.19.0 // indirect
+	golang.org/x/oauth2 v0.12.0 // indirect
+	golang.org/x/sys v0.16.0 // indirect
+	golang.org/x/term v0.15.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	golang.org/x/time v0.3.0 // indirect
+	golang.org/x/tools v0.16.1 // indirect
+	gomodules.xyz/jsonpatch/v2 v2.4.0 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/protobuf v1.31.0 // indirect
+	gopkg.in/inf.v0 v0.9.1 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+	k8s.io/api v0.29.0 // indirect
+	k8s.io/apiextensions-apiserver v0.29.0 // indirect
+	k8s.io/component-base v0.29.0 // indirect
+	k8s.io/klog/v2 v2.110.1 // indirect
+	k8s.io/kube-openapi v0.0.0-20231010175941-2dd684a91f00 // indirect
+	k8s.io/utils v0.0.0-20230726121419-3b25d923346b // indirect
+	sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd // indirect
+	sigs.k8s.io/structured-merge-diff/v4 v4.4.1 // indirect
+	sigs.k8s.io/yaml v1.4.0 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..57b4fa9
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,205 @@
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diff --git a/hack/boilerplate.go.txt b/hack/boilerplate.go.txt
new file mode 100644
index 0000000..77f766e
--- /dev/null
+++ b/hack/boilerplate.go.txt
@@ -0,0 +1,15 @@
+/*
+Copyright 2024 pdok.nl.
+
+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.
+*/
\ No newline at end of file
diff --git a/test/e2e/e2e_suite_test.go b/test/e2e/e2e_suite_test.go
new file mode 100644
index 0000000..fb55370
--- /dev/null
+++ b/test/e2e/e2e_suite_test.go
@@ -0,0 +1,32 @@
+/*
+Copyright 2024 pdok.nl.
+
+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 e2e
+
+import (
+	"fmt"
+	"testing"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+)
+
+// Run e2e tests using the Ginkgo runner.
+func TestE2E(t *testing.T) {
+	RegisterFailHandler(Fail)
+	fmt.Fprintf(GinkgoWriter, "Starting uptime-operator suite\n")
+	RunSpecs(t, "e2e suite")
+}
diff --git a/test/e2e/e2e_test.go b/test/e2e/e2e_test.go
new file mode 100644
index 0000000..b877b9d
--- /dev/null
+++ b/test/e2e/e2e_test.go
@@ -0,0 +1,121 @@
+/*
+Copyright 2024 pdok.nl.
+
+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 e2e
+
+import (
+	"fmt"
+	"os/exec"
+	"time"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+
+	"github.com/PDOK/uptime-operator/test/utils"
+)
+
+const namespace = "uptime-operator-system"
+
+var _ = Describe("controller", Ordered, func() {
+	BeforeAll(func() {
+		By("installing prometheus operator")
+		Expect(utils.InstallPrometheusOperator()).To(Succeed())
+
+		By("installing the cert-manager")
+		Expect(utils.InstallCertManager()).To(Succeed())
+
+		By("creating manager namespace")
+		cmd := exec.Command("kubectl", "create", "ns", namespace)
+		_, _ = utils.Run(cmd)
+	})
+
+	AfterAll(func() {
+		By("uninstalling the Prometheus manager bundle")
+		utils.UninstallPrometheusOperator()
+
+		By("uninstalling the cert-manager bundle")
+		utils.UninstallCertManager()
+
+		By("removing manager namespace")
+		cmd := exec.Command("kubectl", "delete", "ns", namespace)
+		_, _ = utils.Run(cmd)
+	})
+
+	Context("Operator", func() {
+		It("should run successfully", func() {
+			var controllerPodName string
+			var err error
+
+			// projectimage stores the name of the image used in the example
+			var projectimage = "example.com/uptime-operator:v0.0.1"
+
+			By("building the manager(Operator) image")
+			cmd := exec.Command("make", "docker-build", fmt.Sprintf("IMG=%s", projectimage))
+			_, err = utils.Run(cmd)
+			ExpectWithOffset(1, err).NotTo(HaveOccurred())
+
+			By("loading the the manager(Operator) image on Kind")
+			err = utils.LoadImageToKindClusterWithName(projectimage)
+			ExpectWithOffset(1, err).NotTo(HaveOccurred())
+
+			By("installing CRDs")
+			cmd = exec.Command("make", "install")
+			_, err = utils.Run(cmd)
+
+			By("deploying the controller-manager")
+			cmd = exec.Command("make", "deploy", fmt.Sprintf("IMG=%s", projectimage))
+			_, err = utils.Run(cmd)
+			ExpectWithOffset(1, err).NotTo(HaveOccurred())
+
+			By("validating that the controller-manager pod is running as expected")
+			verifyControllerUp := func() error {
+				// Get pod name
+
+				cmd = exec.Command("kubectl", "get",
+					"pods", "-l", "control-plane=controller-manager",
+					"-o", "go-template={{ range .items }}"+
+						"{{ if not .metadata.deletionTimestamp }}"+
+						"{{ .metadata.name }}"+
+						"{{ \"\\n\" }}{{ end }}{{ end }}",
+					"-n", namespace,
+				)
+
+				podOutput, err := utils.Run(cmd)
+				ExpectWithOffset(2, err).NotTo(HaveOccurred())
+				podNames := utils.GetNonEmptyLines(string(podOutput))
+				if len(podNames) != 1 {
+					return fmt.Errorf("expect 1 controller pods running, but got %d", len(podNames))
+				}
+				controllerPodName = podNames[0]
+				ExpectWithOffset(2, controllerPodName).Should(ContainSubstring("controller-manager"))
+
+				// Validate pod status
+				cmd = exec.Command("kubectl", "get",
+					"pods", controllerPodName, "-o", "jsonpath={.status.phase}",
+					"-n", namespace,
+				)
+				status, err := utils.Run(cmd)
+				ExpectWithOffset(2, err).NotTo(HaveOccurred())
+				if string(status) != "Running" {
+					return fmt.Errorf("controller pod in %s status", status)
+				}
+				return nil
+			}
+			EventuallyWithOffset(1, verifyControllerUp, time.Minute, time.Second).Should(Succeed())
+
+		})
+	})
+})
diff --git a/test/utils/utils.go b/test/utils/utils.go
new file mode 100644
index 0000000..0398412
--- /dev/null
+++ b/test/utils/utils.go
@@ -0,0 +1,140 @@
+/*
+Copyright 2024 pdok.nl.
+
+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 utils
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+
+	. "github.com/onsi/ginkgo/v2" //nolint:golint,revive
+)
+
+const (
+	prometheusOperatorVersion = "v0.68.0"
+	prometheusOperatorURL     = "https://github.com/prometheus-operator/prometheus-operator/" +
+		"releases/download/%s/bundle.yaml"
+
+	certmanagerVersion = "v1.5.3"
+	certmanagerURLTmpl = "https://github.com/jetstack/cert-manager/releases/download/%s/cert-manager.yaml"
+)
+
+func warnError(err error) {
+	fmt.Fprintf(GinkgoWriter, "warning: %v\n", err)
+}
+
+// InstallPrometheusOperator installs the prometheus Operator to be used to export the enabled metrics.
+func InstallPrometheusOperator() error {
+	url := fmt.Sprintf(prometheusOperatorURL, prometheusOperatorVersion)
+	cmd := exec.Command("kubectl", "create", "-f", url)
+	_, err := Run(cmd)
+	return err
+}
+
+// Run executes the provided command within this context
+func Run(cmd *exec.Cmd) ([]byte, error) {
+	dir, _ := GetProjectDir()
+	cmd.Dir = dir
+
+	if err := os.Chdir(cmd.Dir); err != nil {
+		fmt.Fprintf(GinkgoWriter, "chdir dir: %s\n", err)
+	}
+
+	cmd.Env = append(os.Environ(), "GO111MODULE=on")
+	command := strings.Join(cmd.Args, " ")
+	fmt.Fprintf(GinkgoWriter, "running: %s\n", command)
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		return output, fmt.Errorf("%s failed with error: (%v) %s", command, err, string(output))
+	}
+
+	return output, nil
+}
+
+// UninstallPrometheusOperator uninstalls the prometheus
+func UninstallPrometheusOperator() {
+	url := fmt.Sprintf(prometheusOperatorURL, prometheusOperatorVersion)
+	cmd := exec.Command("kubectl", "delete", "-f", url)
+	if _, err := Run(cmd); err != nil {
+		warnError(err)
+	}
+}
+
+// UninstallCertManager uninstalls the cert manager
+func UninstallCertManager() {
+	url := fmt.Sprintf(certmanagerURLTmpl, certmanagerVersion)
+	cmd := exec.Command("kubectl", "delete", "-f", url)
+	if _, err := Run(cmd); err != nil {
+		warnError(err)
+	}
+}
+
+// InstallCertManager installs the cert manager bundle.
+func InstallCertManager() error {
+	url := fmt.Sprintf(certmanagerURLTmpl, certmanagerVersion)
+	cmd := exec.Command("kubectl", "apply", "-f", url)
+	if _, err := Run(cmd); err != nil {
+		return err
+	}
+	// Wait for cert-manager-webhook to be ready, which can take time if cert-manager
+	// was re-installed after uninstalling on a cluster.
+	cmd = exec.Command("kubectl", "wait", "deployment.apps/cert-manager-webhook",
+		"--for", "condition=Available",
+		"--namespace", "cert-manager",
+		"--timeout", "5m",
+	)
+
+	_, err := Run(cmd)
+	return err
+}
+
+// LoadImageToKindCluster loads a local docker image to the kind cluster
+func LoadImageToKindClusterWithName(name string) error {
+	cluster := "kind"
+	if v, ok := os.LookupEnv("KIND_CLUSTER"); ok {
+		cluster = v
+	}
+	kindOptions := []string{"load", "docker-image", name, "--name", cluster}
+	cmd := exec.Command("kind", kindOptions...)
+	_, err := Run(cmd)
+	return err
+}
+
+// GetNonEmptyLines converts given command output string into individual objects
+// according to line breakers, and ignores the empty elements in it.
+func GetNonEmptyLines(output string) []string {
+	var res []string
+	elements := strings.Split(output, "\n")
+	for _, element := range elements {
+		if element != "" {
+			res = append(res, element)
+		}
+	}
+
+	return res
+}
+
+// GetProjectDir will return the directory where the project is
+func GetProjectDir() (string, error) {
+	wd, err := os.Getwd()
+	if err != nil {
+		return wd, err
+	}
+	wd = strings.Replace(wd, "/test/e2e", "", -1)
+	return wd, nil
+}