Import dnsmasq-controller

.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
+*~

Dockerfile

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+# 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
+
+FROM alpine:3.11
+RUN apk add --no-cache dnsmasq
+COPY --from=builder /workspace/manager /dnsmasq-controller
+
+ENTRYPOINT ["/dnsmasq-controller"]

Makefile

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+
+# Image URL to use all building/pushing image targets
+IMG ?= controller: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/[email protected] ;\
+	rm -rf $$CONTROLLER_GEN_TMP_DIR ;\
+	}
+CONTROLLER_GEN=$(GOBIN)/controller-gen
+else
+CONTROLLER_GEN=$(shell which controller-gen)
+endif

PROJECT

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+domain: kvaps.cf
+repo: github.com/kvaps/dnsmasq-controller
+resources:
+- group: dnsmasq
+  kind: DnsmasqOptionSet
+  version: v1alpha1
+version: "2"

README.md

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+# Dnsmasq-controller
+
+A Dnsmasq-controller for Kubernetes, implemented in go using [kubebuilder](https://kubebuilder.io/).
+
+## Status
+
+![GitHub](https://img.shields.io/badge/status-alpha-blue?style=for-the-badge)
+![GitHub](https://img.shields.io/github/license/kristofferahl/healthchecksio-operator?style=for-the-badge)
+![GitHub go.mod Go version](https://img.shields.io/github/go-mod/go-version/kristofferahl/healthchecksio-operator?style=for-the-badge)
+
+## Supported resources
+- DnsmasqOptionSet
+
+## Example
+```yaml
+---
+apiVersion: dnsmasq.kvaps.cf/v1alpha1
+kind: DnsmasqOptionSet
+metadata:
+  name: node1
+spec:
+  controller: ""
+  options:
+  - key: host-record
+    value: node1,10.9.8.7
+  - key: dhcp-host
+    value: set:ltsp1,a0:1d:48:b5:ae:a8,a0:1d:48:b5:ae:a9,id:*,10.9.8.7,node1,infinite
+```
+
+### Configuration
+
+| Flag                      | Type   | Required | Description                                                                                                                             |
+|---------------------------|--------|----------|-----------------------------------------------------------------------------------------------------------------------------------------|
+| `-cleanup`                | bool   | false    | Cleanup Dnsmasq config directory before start.                                                                                          |
+| `-conf-dir`               | string | false    | Dnsmasq config directory for write configuration to. (default "/etc/dnsmasq.d")                                                         |
+| `-controller`             | string | false    | Name of the controller this controller satisfies. (default "")                                                                          |
+| `-development`            | bool   | false    | Run the controller in development mode.                                                                                                 |
+| `-enable-leader-election` | bool   | false    | Enable leader election for controller manager. Enabling this will ensure there is only one active controller manager.                   |
+| `-kubeconfig`             | string | false    | Paths to a kubeconfig. Only required if out-of-cluster.                                                                                 |
+| `-log-level`              | string | false    | The log level used by the operator. (default "info")                                                                                    |
+| `-metrics-addr`           | string | false    | The address the metric endpoint binds to. (default ":8080")                                                                             |
+| `-sync-delay`             | int    | false    | Time in seconds to syncronise Dnsmasq configuration. (default 1)                                                                        |
+| `-watch-namespace`        | string | false    | Namespace the controller watches for updates to Kubernetes objects. All namespaces are watched if this parameter is left empty.         |
+| `--`                      | array  | false    | Additional command line arguments for Dnsmasq may be specified after `--` (read [dnsmasq-man] for more details)                         |
+
+[dnsmasq-man]: http://www.thekelleys.org.uk/dnsmasq/docs/dnsmasq-man.html
+
+## Development
+
+### Pre-requisites
+- [Go](https://golang.org/) 1.13 or later
+- [Kubebuilder](https://kubebuilder.io/) 2.3.1
+- [Kubernetes](https://kubernetes.io/) cluster
+
+### Getting started
+```bash
+make install
+make run
+```
+
+### Running tests
+```bash
+make test
+```

api/v1alpha1/dnsmasqoptionset_types.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
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// DnsmasqOptionSetSpecOption defines the desired state of DnsmasqOptionSetSpec
+type DnsmasqOptionSetSpecOption struct {
+	// +kubebuilder:validation:Enum=dhcp-range;dhcp-host;dhcp-userclass;dhcp-circuitid;dhcp-remoteid;dhcp-subscrid;dhcp-ignore;dhcp-broadcast;mx-host;dhcp-boot;dhcp-option;dhcp-option-force;server;rev-server;local;domain;dhcp-vendorclass;alias;dhcp-vendorclass;srv-host;txt-record;ptr-record;bootp-dynamic;dhcp-mac;dhcp-ignore-names;rebind-domain-ok;dhcp-match;dhcp-name-match;naptr-record;dhcp-generate-names;cname;pxe-service;add-mac;dhcp-duid;host-record;caa-record;dns-rr;auth-zone;synth-domain
+	Key   string `json:"key,omitempty"`
+	Value string `json:"value,omitempty"`
+}
+
+// DnsmasqOptionSetSpec defines the desired state of DnsmasqOptionSet
+type DnsmasqOptionSetSpec struct {
+	Controller string                       `json:"controller,omitempty"`
+	Options    []DnsmasqOptionSetSpecOption `json:"options,omitempty"`
+}
+
+// DnsmasqOptionSetStatus defines the observed state of DnsmasqOptionSet
+type DnsmasqOptionSetStatus struct {
+	// INSERT ADDITIONAL STATUS FIELD - define observed state of cluster
+	// Important: Run "make" to regenerate code after modifying this file
+}
+
+// +kubebuilder:resource:shortName=dnsmasqopt;dnsmasqopts
+// +kubebuilder:object:root=true
+
+// DnsmasqOptionSet is the Schema for the dnsmasqoptionsets API
+type DnsmasqOptionSet struct {
+	metav1.TypeMeta   `json:",inline"`
+	metav1.ObjectMeta `json:"metadata,omitempty"`
+
+	Spec   DnsmasqOptionSetSpec   `json:"spec,omitempty"`
+	Status DnsmasqOptionSetStatus `json:"status,omitempty"`
+}
+
+// +kubebuilder:object:root=true
+
+// DnsmasqOptionSetList contains a list of DnsmasqOptionSet
+type DnsmasqOptionSetList struct {
+	metav1.TypeMeta `json:",inline"`
+	metav1.ListMeta `json:"metadata,omitempty"`
+	Items           []DnsmasqOptionSet `json:"items"`
+}
+
+func init() {
+	SchemeBuilder.Register(&DnsmasqOptionSet{}, &DnsmasqOptionSetList{})
+}

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 dnsmasq v1alpha1 API group
+// +kubebuilder:object:generate=true
+// +groupName=dnsmasq.kvaps.cf
+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: "dnsmasq.kvaps.cf", 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
+)