Flannel Operator

flannel/.gitignore

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+
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+bin
+
+# Test binary, build with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Kubernetes Generated files - skip generated files, except for vendored files
+
+!vendor/**/zz_generated.*
+
+# editor and IDE paraphernalia
+.idea
+*.swp
+*.swo
+*~

flannel/Dockerfile

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+FROM ubuntu:19.10 as kubectl
+RUN apt-get update
+RUN apt-get install -y curl
+RUN curl -fsSL https://dl.k8s.io/release/v1.17.4/bin/linux/amd64/kubectl > /usr/bin/kubectl
+RUN chmod a+rx /usr/bin/kubectl
+
+# Build the manager binary
+FROM golang:1.13 as builder
+
+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 main.go main.go
+COPY api/ api/
+COPY controllers/ controllers/
+
+# Build
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -a -o manager 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 .
+COPY --from=kubectl /usr/bin/kubectl /usr/bin/kubectl
+COPY channels/ channels/
+USER nonroot:nonroot
+
+ENTRYPOINT ["/manager"]

flannel/Makefile

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+# Image URL to use all building/pushing image targets
+IMG ?= ${USER}/flannel-operator:latest
+# Produce CRDs that work back to Kubernetes 1.11 (no version conversion)
+CRD_OPTIONS ?= "crd:trivialVersions=true"
+
+# Get the currently used golang install path (in GOPATH/bin, unless GOBIN is set)
+ifeq (,$(shell go env GOBIN))
+GOBIN=$(shell go env GOPATH)/bin
+else
+GOBIN=$(shell go env GOBIN)
+endif
+
+all: manager
+
+# Run tests
+test: generate fmt vet manifests
+	go test ./... -coverprofile cover.out
+
+# Build manager binary
+manager: generate fmt vet
+	go build -o bin/manager main.go
+
+# Run against the configured Kubernetes cluster in ~/.kube/config
+run: generate fmt vet manifests
+	go run ./main.go
+
+# Install CRDs into a cluster
+install: manifests
+	kustomize build config/crd | kubectl apply -f -
+
+# Uninstall CRDs from a cluster
+uninstall: manifests
+	kustomize build config/crd | kubectl delete -f -
+
+# Deploy controller in the configured Kubernetes cluster in ~/.kube/config
+deploy: manifests
+	cd config/manager && kustomize edit set image controller=${IMG}
+	kustomize build config/default | kubectl apply -f -
+
+# Generate manifests e.g. CRD, RBAC etc.
+manifests: controller-gen
+	$(CONTROLLER_GEN) $(CRD_OPTIONS) rbac:roleName=manager-role webhook paths="./..." output:crd:artifacts:config=config/crd/bases
+
+# Run go fmt against code
+fmt:
+	go fmt ./...
+
+# Run go vet against code
+vet:
+	go vet ./...
+
+# Generate code
+generate: controller-gen
+	$(CONTROLLER_GEN) object:headerFile=./hack/boilerplate.go.txt paths="./..."
+
+# Build the docker image
+docker-build: test
+	docker build . -t ${IMG}
+
+# Push the docker image
+docker-push:
+	docker push ${IMG}
+
+# find or download controller-gen
+# download controller-gen if necessary
+controller-gen:
+ifeq (, $(shell which controller-gen))
+	@{ \
+	set -e ;\
+	CONTROLLER_GEN_TMP_DIR=$$(mktemp -d) ;\
+	cd $$CONTROLLER_GEN_TMP_DIR ;\
+	go mod init tmp ;\
+	go get sigs.k8s.io/controller-tools/cmd/controller-gen@v0.2.4 ;\
+	rm -rf $$CONTROLLER_GEN_TMP_DIR ;\
+	}
+CONTROLLER_GEN=$(GOBIN)/controller-gen
+else
+CONTROLLER_GEN=$(shell which controller-gen)
+endif

flannel/PROJECT

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+domain: x-k8s.io
+repo: sigs.k8s.io/cluster-addons/flannel
+resources:
+- group: addons
+  kind: Flannel
+  version: v1alpha1
+version: "2"

flannel/api/v1alpha1/flannel_types.go

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+package v1alpha1
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	addonv1alpha1 "sigs.k8s.io/kubebuilder-declarative-pattern/pkg/patterns/addon/pkg/apis/v1alpha1"
+)
+
+// EDIT THIS FILE!  THIS IS SCAFFOLDING FOR YOU TO OWN!
+// NOTE: json tags are required.  Any new fields you add must have json tags for the fields to be serialized.
+
+// FlannelSpec defines the desired state of Flannel
+type FlannelSpec struct {
+	addonv1alpha1.CommonSpec `json:",inline"`
+	addonv1alpha1.PatchSpec  `json:",inline"`
+
+	// INSERT ADDITIONAL SPEC FIELDS - desired state of cluster
+	// Important: Run "make" to regenerate code after modifying this file
+}
+
+// FlannelStatus defines the observed state of Flannel
+type FlannelStatus struct {
+	addonv1alpha1.CommonStatus `json:",inline"`
+
+	// INSERT ADDITIONAL STATUS FIELD - define observed state of cluster
+	// Important: Run "make" to regenerate code after modifying this file
+}
+
+// +kubebuilder:object:root=true
+
+// Flannel is the Schema for the flannels API
+type Flannel struct {
+	metav1.TypeMeta   `json:",inline"`
+	metav1.ObjectMeta `json:"metadata,omitempty"`
+
+	Spec   FlannelSpec   `json:"spec,omitempty"`
+	Status FlannelStatus `json:"status,omitempty"`
+}
+
+var _ addonv1alpha1.CommonObject = &Flannel{}
+var _ addonv1alpha1.Patchable = &Flannel{}
+
+func (o *Flannel) ComponentName() string {
+	return "flannel"
+}
+
+func (o *Flannel) CommonSpec() addonv1alpha1.CommonSpec {
+	return o.Spec.CommonSpec
+}
+
+func (o *Flannel) PatchSpec() addonv1alpha1.PatchSpec {
+	return o.Spec.PatchSpec
+}
+
+func (o *Flannel) GetCommonStatus() addonv1alpha1.CommonStatus {
+	return o.Status.CommonStatus
+}
+
+func (o *Flannel) SetCommonStatus(s addonv1alpha1.CommonStatus) {
+	o.Status.CommonStatus = s
+}
+
+// +kubebuilder:object:root=true
+
+// FlannelList contains a list of Flannel
+type FlannelList struct {
+	metav1.TypeMeta `json:",inline"`
+	metav1.ListMeta `json:"metadata,omitempty"`
+	Items           []Flannel `json:"items"`
+}
+
+func init() {
+	SchemeBuilder.Register(&Flannel{}, &FlannelList{})
+}

flannel/api/v1alpha1/groupversion_info.go

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+/*
+
+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 v1alpha1 contains API Schema definitions for the addons v1alpha1 API group
+// +kubebuilder:object:generate=true
+// +groupName=addons.x-k8s.io
+package v1alpha1
+
+import (
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"sigs.k8s.io/controller-runtime/pkg/scheme"
+)
+
+var (
+	// GroupVersion is group version used to register these objects
+	GroupVersion = schema.GroupVersion{Group: "addons.x-k8s.io", Version: "v1alpha1"}
+
+	// SchemeBuilder is used to add go types to the GroupVersionKind scheme
+	SchemeBuilder = &scheme.Builder{GroupVersion: GroupVersion}
+
+	// AddToScheme adds the types in this group-version to the given scheme.
+	AddToScheme = SchemeBuilder.AddToScheme
+)

flannel/channels/latest

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+# Versions for the stable channel
+manifests:
+- version: 0.12.0