initial commit

.goreleaser.yaml

@@ -0,0 +1,96 @@
+project_name: external-dns-vultr-webhook
+version: 2
+
+builds:
+  - main: ./cmd/webhook
+    env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+      - windows
+      - darwin
+    goarch:
+      - amd64
+      - arm64
+
+    ldflags:
+      - -X 'main.Version={{.Version}}'
+      - -X 'main.Gitsha={{.ShortCommit}}'
+archives:
+  - format: tar.gz
+    # this name template makes the OS and Arch compatible with the results of uname.
+    name_template: >-
+      {{ .ProjectName }}_
+      {{- title .Os }}_
+      {{- if eq .Arch "amd64" }}x86_64
+      {{- else if eq .Arch "386" }}i386
+      {{- else }}{{ .Arch }}{{ end }}
+      {{- if .Arm }}v{{ .Arm }}{{ end }}
+    # use zip for windows archives
+    format_overrides:
+      - goos: windows
+        format: zip
+dockers:
+  - id: external-dns-vultr-webhook-amd64
+    use: buildx
+    image_templates:
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .Tag }}-amd64"
+    goos: linux
+    goarch: amd64
+    build_flag_templates:
+      - --platform=linux/amd64
+      - --label=org.opencontainers.image.title={{ .ProjectName }}
+      - --label=org.opencontainers.image.description=vultr DNS webhook for external-dns
+      - --label=org.opencontainers.image.url=https://{{ .Env.GITHUB_SERVER_URL }}/{{ .Env.GITHUB_REPOSITORY}}
+      - --label=org.opencontainers.image.source=https://{{ .Env.GITHUB_SERVER_URL }}/{{ .Env.GITHUB_REPOSITORY}}
+      - --label=org.opencontainers.image.version={{ .Version }}
+      - --label=org.opencontainers.image.created={{ time "2006-01-02T15:04:05Z07:00" }}
+      - --label=org.opencontainers.image.revision={{ .FullCommit }}
+      - --label=org.opencontainers.image.licenses=Apache-2.0
+  - id: external-dns-vultr-webhook-arm64
+    use: buildx
+    image_templates:
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .Tag }}-arm64"
+    goos: linux
+    goarch: arm64
+    build_flag_templates:
+      - --platform=linux/arm64/v8
+      - --label=org.opencontainers.image.title={{ .ProjectName }}
+      - --label=org.opencontainers.image.description=vultr DNS webhook for external-dns
+      - --label=org.opencontainers.image.url=https://{{ .Env.GITHUB_SERVER_URL }}/{{ .Env.GITHUB_REPOSITORY}}
+      - --label=org.opencontainers.image.source=https://{{ .Env.GITHUB_SERVER_URL }}/{{ .Env.GITHUB_REPOSITORY}}
+      - --label=org.opencontainers.image.version={{ .Version }}
+      - --label=org.opencontainers.image.created={{ time "2006-01-02T15:04:05Z07:00" }}
+      - --label=org.opencontainers.image.revision={{ .FullCommit }}
+      - --label=org.opencontainers.image.licenses=Apache-2.0
+docker_manifests:
+  - name_template: "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .Tag }}"
+    image_templates:
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .Tag }}-amd64"
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .Tag }}-arm64"
+  - name_template: "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .ShortCommit }}"
+    image_templates:
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .Tag }}-amd64"
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .Tag }}-arm64"
+  - name_template: "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:latest"
+    image_templates:
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .Tag }}-amd64"
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .Tag }}-arm64"
+checksum:
+  disable: false
+  name_template: "{{ .ProjectName }}_{{ .Version }}_checksums.txt"
+
+snapshot:
+  version_template: "{{ incpatch .Version }}-next"
+
+changelog:
+  use: github
+  sort: asc
+  filters:
+    exclude:
+      - "^docs:"
+      - "^test:"
+# The lines beneath this are called `modelines`. See `:help modeline`
+# Feel free to remove those if you don't want/use them.
+# yaml-language-server: $schema=https://goreleaser.com/static/schema.json
+# vim: set ts=2 sw=2 tw=0 fo=cnqoj

Dockerfile

@@ -0,0 +1,6 @@
+FROM gcr.io/distroless/static-debian11:nonroot
+
+USER 20000:20000
+ADD --chmod=555 external-dns-vultr-webhook /opt/external-dns-vultr-webhook/app
+
+ENTRYPOINT ["/opt/external-dns-vultr-webhook/app"]

Makefile

@@ -0,0 +1,101 @@
+GO_TEST = go run gotest.tools/gotestsum --format pkgname
+
+LICENCES_IGNORE_LIST = $(shell cat licences/licences-ignore-list.txt)
+
+ifndef $(GOPATH)
+    GOPATH=$(shell go env GOPATH)
+    export GOPATH
+endif
+
+ARTIFACT_NAME = external-dns-vultr-webhook
+
+
+REGISTRY ?= localhost:5001
+IMAGE_NAME ?= external-dns-vultr-webhook
+IMAGE_TAG ?= latest
+IMAGE = $(REGISTRY)/$(IMAGE_NAME):$(IMAGE_TAG)
+
+##@ General
+
+.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)
+
+show: ## Show variables
+	@echo "GOPATH: $(GOPATH)"
+	@echo "ARTIFACT_NAME: $(ARTIFACT_NAME)"
+	@echo "REGISTRY: $(REGISTRY)"
+	@echo "IMAGE_NAME: $(IMAGE_NAME)"
+	@echo "IMAGE_TAG: $(IMAGE_TAG)"
+	@echo "IMAGE: $(IMAGE)"
+
+
+##@ Code analysis
+
+.PHONY: vet
+vet: ## Run go vet against code.
+	go vet ./...
+
+.PHONY: lint
+lint: ## Run golangci-lint against code.
+	mkdir -p build/reports
+	go run github.com/golangci/golangci-lint/cmd/golangci-lint run --timeout 2m
+
+.PHONY: static-analysis
+static-analysis: lint vet ## Run static analysis against code.
+
+##@ GO
+
+.PHONY: clean
+clean: ## Clean the build directory
+	rm -rf ./dist
+	rm -rf ./build
+	rm -rf ./vendor
+
+.PHONY: build
+build: ## Build the binary
+	CGO_ENABLED=0 go build -o build/bin/$(ARTIFACT_NAME) ./cmd/webhook
+
+.PHONY: run
+run:build ## Run the binary on local machine
+	build/bin/external-dns-vultr-webhook
+
+##@ Docker
+
+.PHONY: docker-build
+docker-build: build ## Build the docker image
+	docker build ./ -f localbuild.Dockerfile -t $(IMAGE)
+
+.PHONY: docker-push
+docker-push: ## Push the docker image
+	docker push $(IMAGE)
+
+##@ Test
+
+.PHONY: unit-test
+unit-test: ## Run unit tests
+	mkdir -p build/reports
+	$(GO_TEST) --junitfile build/reports/unit-test.xml -- -race ./... -count=1 -short -cover -coverprofile build/reports/unit-test-coverage.out
+
+
+##@ Release
+
+.PHONY: release-check
+release-check: ## Check if the release will work
+	GITHUB_SERVER_URL=github.com GITHUB_REPOSITORY=vultr/external-dns-vultr-webhook REGISTRY=$(REGISTRY) IMAGE_NAME=$(IMAGE_NAME) goreleaser release --snapshot --clean --skip=publish
+
+##@ License
+
+.PHONY: license-check
+license-check: ## Run go-licenses check against code.
+	go install github.com/google/go-licenses
+	mkdir -p build/reports
+	echo "$(LICENCES_IGNORE_LIST)"
+	$(GOPATH)/bin/go-licenses check --include_tests --ignore "$(LICENCES_IGNORE_LIST)" ./...
+
+.PHONY: license-report
+license-report: ## Create licenses report against code.
+	go install github.com/google/go-licenses
+	mkdir -p build/reports/licenses
+	$(GOPATH)/bin/go-licenses report --include_tests --ignore "$(LICENCES_IGNORE_LIST)" ./... >build/reports/licenses/licenses-list.csv
+	cat licences/licenses-manual-list.csv >> build/reports/licenses/licenses-list.csv

cmd/webhook/main.go

@@ -0,0 +1,64 @@
+package main
+
+import (
+	"github.com/codingconcepts/env"
+	log "github.com/sirupsen/logrus"
+	"github.com/vultr/external-dns-vultr-webhook/internal/server"
+	"github.com/vultr/external-dns-vultr-webhook/internal/vultr"
+	"os"
+	"os/signal"
+	"sigs.k8s.io/external-dns/provider/webhook/api"
+	"syscall"
+)
+
+// loop waits for a SIGTERM or a SIGINT and then shuts down the server.
+func loop(status *server.HealthStatus) {
+	exitSignal := make(chan os.Signal, 1)
+	signal.Notify(exitSignal, syscall.SIGINT, syscall.SIGTERM)
+	signal := <-exitSignal
+
+	log.Infof("Signal %s received. Shutting down the webhook.", signal.String())
+	status.SetHealth(false)
+	status.SetReady(false)
+}
+
+func main() {
+	// Read server options
+	serverOptions := &server.ServerOptions{}
+	if err := env.Set(serverOptions); err != nil {
+		log.Fatal(err)
+	}
+
+	// Start health server
+	log.Infof("Starting liveness and readiness server on %s", serverOptions.GetHealthAddress())
+	healthStatus := server.HealthStatus{}
+	healthServer := server.HealthServer{}
+	go healthServer.Start(&healthStatus, nil, *serverOptions)
+
+	// Read provider configuration
+	providerConfig := &vultr.Configuration{}
+	if err := env.Set(providerConfig); err != nil {
+		log.Fatal(err)
+	}
+
+	// instantiate the Vultr provider
+	provider := vultr.NewProvider(providerConfig)
+
+	// Start the webhook
+	log.Infof("Starting webhook server on %s", serverOptions.GetWebhookAddress())
+	startedChan := make(chan struct{})
+	go api.StartHTTPApi(
+		provider, startedChan,
+		serverOptions.GetReadTimeout(),
+		serverOptions.GetWriteTimeout(),
+		serverOptions.GetWebhookAddress(),
+	)
+
+	// Wait for the HTTP server to start and then set the healthy and ready flags
+	<-startedChan
+	healthStatus.SetHealth(true)
+	healthStatus.SetReady(true)
+
+	// Loops until a signal tells us to exit
+	loop(&healthStatus)
+}

go.mod

@@ -0,0 +1,47 @@
+module github.com/vultr/external-dns-vultr-webhook
+
+go 1.23.1
+
+require (
+	github.com/codingconcepts/env v0.0.0-20240618133406-5b0845441187
+	github.com/sirupsen/logrus v1.9.3
+	github.com/vultr/govultr/v3 v3.9.1
+	golang.org/x/oauth2 v0.23.0
+	sigs.k8s.io/external-dns v0.15.0
+)
+
+require (
+	github.com/aws/aws-sdk-go v1.55.5 // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/fxamacker/cbor/v2 v2.7.0 // indirect
+	github.com/go-logr/logr v1.4.2 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/google/go-cmp v0.6.0 // indirect
+	github.com/google/go-querystring v1.1.0 // indirect
+	github.com/google/gofuzz v1.2.0 // indirect
+	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
+	github.com/hashicorp/go-retryablehttp v0.7.7 // indirect
+	github.com/jmespath/go-jmespath v0.4.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/kr/text v0.2.0 // 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/prometheus/client_golang v1.20.0 // indirect
+	github.com/prometheus/client_model v0.6.1 // indirect
+	github.com/prometheus/common v0.55.0 // indirect
+	github.com/prometheus/procfs v0.15.1 // indirect
+	github.com/x448/float16 v0.8.4 // indirect
+	golang.org/x/net v0.28.0 // indirect
+	golang.org/x/sys v0.23.0 // indirect
+	golang.org/x/text v0.17.0 // indirect
+	google.golang.org/protobuf v1.34.2 // indirect
+	gopkg.in/inf.v0 v0.9.1 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	k8s.io/apimachinery v0.31.0 // indirect
+	k8s.io/klog/v2 v2.130.1 // indirect
+	k8s.io/utils v0.0.0-20240711033017-18e509b52bc8 // indirect
+	sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd // indirect
+	sigs.k8s.io/structured-merge-diff/v4 v4.4.1 // indirect
+)