Add go operator

.dockerignore

@@ -0,0 +1,3 @@
+# More info: https://docs.docker.com/engine/reference/builder/#dockerignore-file
+# Ignore build and test binaries.
+bin/

.github/CODEOWNERS

@@ -0,0 +1 @@
+as51340

.gitmodules

@@ -1,4 +1,4 @@
 [submodule "helm-charts"]
 	path = helm-charts
-  url = https://github.com/memgraph/helm-charts.git
+	url = https://github.com/memgraph/helm-charts.git
   branch = main

.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

Dockerfile

@@ -1,7 +1,33 @@
 # Build the manager binary
-FROM quay.io/operator-framework/helm-operator:v1.35.0
+FROM golang:1.20 AS builder
+ARG TARGETOS
+ARG TARGETARCH
 
-ENV HOME=/opt/helm
-COPY watches.yaml ${HOME}/watches.yaml
-COPY helm-charts  ${HOME}/helm-charts
-WORKDIR ${HOME}
+WORKDIR /workspace
+# Copy the Go Modules manifests
+COPY go.mod go.mod
+COPY go.sum go.sum
+# cache deps before building and copying source so that we don't need to re-download as much
+# and so that source changes don't invalidate our downloaded layer
+RUN go mod download
+
+# Copy the go source
+COPY cmd/main.go cmd/main.go
+COPY api/ api/
+COPY internal/controller/ internal/controller/
+
+# Build
+# the GOARCH has not a default value to allow the binary be built according to the host where the command
+# was called. For example, if we call make docker-build in a local env which has the Apple Silicon M1 SO
+# the docker BUILDPLATFORM arg will be linux/arm64 when for Apple x86 it will be linux/amd64. Therefore,
+# by leaving it empty we can ensure that the container and binary shipped on it will have the same platform.
+RUN CGO_ENABLED=0 GOOS=${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"]

Makefile

@@ -3,7 +3,7 @@
 # To re-generate a bundle for another specific version without changing the standard setup, you can:
 # - use the VERSION as arg of the bundle target (e.g make bundle VERSION=0.0.2)
 # - use environment variables to overwrite this value (e.g export VERSION=0.0.2)
-VERSION ?= 0.0.3
+VERSION ?= 0.0.1
 
 # CHANNELS define the bundle channels used in the bundle.
 # Add a new line here if you would like to change its default config. (E.g CHANNELS = "candidate,fast,stable")
@@ -28,8 +28,8 @@ BUNDLE_METADATA_OPTS ?= $(BUNDLE_CHANNELS) $(BUNDLE_DEFAULT_CHANNEL)
 # This variable is used to construct full image tags for bundle and catalog images.
 #
 # For example, running 'make bundle-build bundle-push catalog-build catalog-push' will build and push both
-# my.domain/kubernetes-operator-bundle:$VERSION and my.domain/kubernetes-operator-catalog:$VERSION.
-IMAGE_TAG_BASE ?= memgraph/kubernetes-operator
+# com/kubernetes-operator-bundle:$VERSION and com/kubernetes-operator-catalog:$VERSION.
+IMAGE_TAG_BASE ?= com/kubernetes-operator
 
 # BUNDLE_IMG defines the image:tag used for the bundle.
 # You can use it as an arg. (E.g make bundle-build BUNDLE_IMG=<some-registry>/<project-name-bundle>:<tag>)
@@ -51,16 +51,36 @@ endif
 OPERATOR_SDK_VERSION ?= v1.35.0
 
 # Image URL to use all building/pushing image targets
-IMG ?= $(IMAGE_TAG_BASE):$(VERSION)
+IMG ?= controller:latest
+# ENVTEST_K8S_VERSION refers to the version of kubebuilder assets to be downloaded by envtest binary.
+ENVTEST_K8S_VERSION = 1.28.3
+
+# 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: docker-build
+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 commands is responsible for reading 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.
@@ -73,87 +93,146 @@ all: docker-build
 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
+
+GOLANGCI_LINT = $(shell pwd)/bin/golangci-lint
+GOLANGCI_LINT_VERSION ?= v1.54.2
+golangci-lint:
+	@[ -f $(GOLANGCI_LINT) ] || { \
+	set -e ;\
+	curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(shell dirname $(GOLANGCI_LINT)) $(GOLANGCI_LINT_VERSION) ;\
+	}
+
+.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: helm-operator ## Run against the configured Kubernetes cluster in ~/.kube/config
-	$(HELM_OPERATOR) 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.
-	docker build -t ${IMG} .
+	$(CONTAINER_TOOL) build -t ${IMG} .
 
 .PHONY: docker-push
 docker-push: ## Push docker image with the manager.
-	docker push ${IMG}
+	$(CONTAINER_TOOL) push ${IMG}
 
-# PLATFORMS defines the target platforms for  the manager image be build to provide support to multiple
+# 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:
-# - able to use docker buildx . More info: https://docs.docker.com/build/buildx/
-# - have enable BuildKit, More info: https://docs.docker.com/develop/develop-images/build_enhancements/
-# - be able to push the image for your registry (i.e. if you do not inform a valid value via IMG=<myregistry/image:<tag>> than the export will fail)
-# To properly provided solutions that supports more than one platform you should use this option.
+# - 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
-	- docker buildx create --name project-v3-builder
-	docker buildx use project-v3-builder
-	- docker buildx build --push --platform=$(PLATFORMS) --tag ${IMG} -f Dockerfile .
-	- docker buildx rm project-v3-builder
+	# copy existing Dockerfile and insert --platform=${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
 
 ##@ Deployment
 
+ifndef ignore-not-found
+  ignore-not-found = false
+endif
+
 .PHONY: install
-install: kustomize ## Install CRDs into the K8s cluster specified in ~/.kube/config.
-	$(KUSTOMIZE) build config/crd | kubectl apply -f -
+install: manifests kustomize ## Install CRDs into the K8s cluster specified in ~/.kube/config.
+	$(KUSTOMIZE) build config/crd | $(KUBECTL) apply -f -
 
 .PHONY: uninstall
-uninstall: kustomize ## Uninstall CRDs from the K8s cluster specified in ~/.kube/config.
-	$(KUSTOMIZE) build config/crd | kubectl delete -f -
+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: kustomize ## Deploy controller to the K8s cluster specified in ~/.kube/config.
-	cd config/manager && $(KUSTOMIZE) edit set image memgraph-kubernetes-operator=${IMG}
-	$(KUSTOMIZE) build config/default | kubectl apply -f -
+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: ## Undeploy controller from the K8s cluster specified in ~/.kube/config.
-	$(KUSTOMIZE) build config/default | kubectl delete -f -
+undeploy: ## 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 -
 
-OS := $(shell uname -s | tr '[:upper:]' '[:lower:]')
-ARCH := $(shell uname -m | sed 's/x86_64/amd64/' | sed 's/aarch64/arm64/')
+##@ Build Dependencies
 
-.PHONY: kustomize
-KUSTOMIZE = $(shell pwd)/bin/kustomize
-kustomize: ## Download kustomize locally if necessary.
-ifeq (,$(wildcard $(KUSTOMIZE)))
-ifeq (,$(shell which kustomize 2>/dev/null))
-	@{ \
-	set -e ;\
-	mkdir -p $(dir $(KUSTOMIZE)) ;\
-	curl -sSLo - https://github.com/kubernetes-sigs/kustomize/releases/download/kustomize/v5.2.1/kustomize_v5.2.1_$(OS)_$(ARCH).tar.gz | \
-	tar xzf - -C bin/ ;\
-	}
-else
-KUSTOMIZE = $(shell which kustomize)
-endif
-endif
+## Location to install dependencies to
+LOCALBIN ?= $(shell pwd)/bin
+$(LOCALBIN):
+	mkdir -p $(LOCALBIN)
 
-.PHONY: helm-operator
-HELM_OPERATOR = $(shell pwd)/bin/helm-operator
-helm-operator: ## Download helm-operator locally if necessary, preferring the $(pwd)/bin path over global if both exist.
-ifeq (,$(wildcard $(HELM_OPERATOR)))
-ifeq (,$(shell which helm-operator 2>/dev/null))
-	@{ \
-	set -e ;\
-	mkdir -p $(dir $(HELM_OPERATOR)) ;\
-	curl -sSLo $(HELM_OPERATOR) https://github.com/operator-framework/operator-sdk/releases/download/v1.35.0/helm-operator_$(OS)_$(ARCH) ;\
-	chmod +x $(HELM_OPERATOR) ;\
-	}
-else
-HELM_OPERATOR = $(shell which helm-operator)
-endif
-endif
+## Tool Binaries
+KUBECTL ?= kubectl
+KUSTOMIZE ?= $(LOCALBIN)/kustomize
+CONTROLLER_GEN ?= $(LOCALBIN)/controller-gen
+ENVTEST ?= $(LOCALBIN)/setup-envtest
+
+## Tool Versions
+KUSTOMIZE_VERSION ?= v5.2.1
+CONTROLLER_TOOLS_VERSION ?= v0.15.0
+
+.PHONY: kustomize
+kustomize: $(KUSTOMIZE) ## Download kustomize locally if necessary. If wrong version is installed, it will be removed before downloading.
+$(KUSTOMIZE): $(LOCALBIN)
+	@if test -x $(LOCALBIN)/kustomize && ! $(LOCALBIN)/kustomize version | grep -q $(KUSTOMIZE_VERSION); then \
+		echo "$(LOCALBIN)/kustomize version is not expected $(KUSTOMIZE_VERSION). Removing it before installing."; \
+		rm -rf $(LOCALBIN)/kustomize; \
+	fi
+	test -s $(LOCALBIN)/kustomize || GOBIN=$(LOCALBIN) GO111MODULE=on go install sigs.k8s.io/kustomize/kustomize/v5@$(KUSTOMIZE_VERSION)
+
+.PHONY: controller-gen
+controller-gen: $(CONTROLLER_GEN) ## Download controller-gen locally if necessary. If wrong version is installed, it will be overwritten.
+$(CONTROLLER_GEN): $(LOCALBIN)
+	test -s $(LOCALBIN)/controller-gen && $(LOCALBIN)/controller-gen --version | grep -q $(CONTROLLER_TOOLS_VERSION) || \
+	GOBIN=$(LOCALBIN) go install sigs.k8s.io/controller-tools/cmd/controller-gen@$(CONTROLLER_TOOLS_VERSION)
+
+.PHONY: envtest
+envtest: $(ENVTEST) ## Download envtest-setup locally if necessary.
+$(ENVTEST): $(LOCALBIN)
+	test -s $(LOCALBIN)/setup-envtest || GOBIN=$(LOCALBIN) go install sigs.k8s.io/controller-runtime/tools/setup-envtest@latest
 
 .PHONY: operator-sdk
 OPERATOR_SDK ?= $(LOCALBIN)/operator-sdk
@@ -163,7 +242,8 @@ ifeq (, $(shell which operator-sdk 2>/dev/null))
 	@{ \
 	set -e ;\
 	mkdir -p $(dir $(OPERATOR_SDK)) ;\
-	curl -sSLo $(OPERATOR_SDK) https://github.com/operator-framework/operator-sdk/releases/download/$(OPERATOR_SDK_VERSION)/operator-sdk_$(OS)_$(ARCH) ;\
+	OS=$(shell go env GOOS) && ARCH=$(shell go env GOARCH) && \
+	curl -sSLo $(OPERATOR_SDK) https://github.com/operator-framework/operator-sdk/releases/download/$(OPERATOR_SDK_VERSION)/operator-sdk_$${OS}_$${ARCH} ;\
 	chmod +x $(OPERATOR_SDK) ;\
 	}
 else
@@ -172,9 +252,9 @@ endif
 endif
 
 .PHONY: bundle
-bundle: kustomize operator-sdk ## Generate bundle manifests and metadata, then validate generated files.
+bundle: manifests kustomize operator-sdk ## Generate bundle manifests and metadata, then validate generated files.
 	$(OPERATOR_SDK) generate kustomize manifests -q
-	cd config/manager && $(KUSTOMIZE) edit set image memgraph-kubernetes-operator=$(IMG)
+	cd config/manager && $(KUSTOMIZE) edit set image controller=$(IMG)
 	$(KUSTOMIZE) build config/manifests | $(OPERATOR_SDK) generate bundle $(BUNDLE_GEN_FLAGS)
 	$(OPERATOR_SDK) bundle validate ./bundle
 
@@ -194,7 +274,8 @@ ifeq (,$(shell which opm 2>/dev/null))
 	@{ \
 	set -e ;\
 	mkdir -p $(dir $(OPM)) ;\
-	curl -sSLo $(OPM) https://github.com/operator-framework/operator-registry/releases/download/v1.23.0/$(OS)-$(ARCH)-opm ;\
+	OS=$(shell go env GOOS) && ARCH=$(shell go env GOARCH) && \
+	curl -sSLo $(OPM) https://github.com/operator-framework/operator-registry/releases/download/v1.23.0/$${OS}-$${ARCH}-opm ;\
 	chmod +x $(OPM) ;\
 	}
 else
@@ -225,13 +306,3 @@ catalog-build: opm ## Build a catalog image.
 .PHONY: catalog-push
 catalog-push: ## Push a catalog image.
 	$(MAKE) docker-push IMG=$(CATALOG_IMG)
-
-HELMIFY ?= helmify
-
-.PHONY: helmify
-helmify: $(HELMIFY) ## Download helmify locally if necessary.
-$(HELMIFY): $(LOCALBIN)
-	test -s $(LOCALBIN)/helmify || GOBIN=$(LOCALBIN) go install github.com/arttor/helmify/cmd/helmify@latest
-
-helm: config/manifests kustomize helmify
-	$(KUSTOMIZE) build config/default | $(HELMIFY)