Version commit hash

.github/workflows/build-images.yaml

@@ -46,6 +46,10 @@ jobs:
           image: ${{ env.OPERATOR_NAME }}
           tags: ${{ env.IMG_TAGS }}
           platforms: linux/amd64,linux/arm64
+          build-args: |
+            GIT_SHA=${{ github.sha }}
+            DIRTY=false
+
           dockerfiles: |
             ./Dockerfile
 
@@ -92,6 +96,9 @@ jobs:
           image: ${{ env.OPERATOR_NAME }}-bundle
           tags: ${{ needs.build.outputs.build-tags }}
           platforms: linux/amd64,linux/arm64
+          build-args: |
+            GIT_SHA=${{ github.sha }}
+            DIRTY=false
           dockerfiles: |
             ./bundle.Dockerfile
 

Dockerfile

@@ -1,8 +1,15 @@
 # Build the manager binary
-FROM golang:1.21 as builder
+FROM golang:1.21 AS builder
 ARG TARGETOS
 ARG TARGETARCH
 
+ARG GIT_SHA
+ARG DIRTY
+
+ENV GIT_SHA=${GIT_SHA:-unknown}
+ENV DIRTY=${DIRTY:-unknown}
+
+
 WORKDIR /workspace
 # Copy the Go Modules manifests
 COPY go.mod go.mod
@@ -15,13 +22,12 @@ RUN go mod download
 COPY cmd/main.go cmd/main.go
 COPY api/ api/
 COPY internal/ internal/
-
 # 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
+RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -ldflags "-X main.gitSHA=${GIT_SHA} -X main.dirty=${DIRTY}" -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

Makefile

@@ -214,19 +214,25 @@ local-deploy-namespaced: docker-build kind-load-image ## Deploy the dns operator
 ##@ Build
 
 .PHONY: build
+build: GIT_SHA=$(shell git rev-parse HEAD || echo "unknown") 
+build: DIRTY=$(shell hack/check-git-dirty.sh || echo "unknown")
 build: manifests generate fmt vet ## Build manager binary.
-	go build -o bin/manager cmd/main.go
+	go build -ldflags "-X main.gitSHA=${GIT_SHA} -X main.dirty=${DIRTY}" -o bin/manager cmd/main.go
 
 .PHONY: run
+run: GIT_SHA=$(shell git rev-parse HEAD || echo "unknown") 
+run: DIRTY=$(shell hack/check-git-dirty.sh || echo "unknown")
 run: manifests generate fmt vet ## Run a controller from your host.
-	go run ./cmd/main.go --zap-devel --provider inmemory,aws,google,azure
+	go run -ldflags "-X main.gitSHA=${GIT_SHA} -X main.dirty=${DIRTY}" ./cmd/main.go --zap-devel --provider inmemory,aws,google,azure
 
 # If you wish built 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: GIT_SHA=$(shell git rev-parse HEAD || echo "unknown") 
+docker-build: DIRTY=$(shell hack/check-git-dirty.sh || echo "unknown")
 docker-build: ## Build docker image with the manager.
-	$(CONTAINER_TOOL) build -t ${IMG} .
+	$(CONTAINER_TOOL) build -t ${IMG} . --build-arg GIT_SHA=$(GIT_SHA) --build-arg DIRTY=$(DIRTY)
 
 .PHONY: docker-push
 docker-push: ## Push docker image with the manager.

cmd/main.go

@@ -41,12 +41,15 @@ import (
 	_ "github.com/kuadrant/dns-operator/internal/provider/azure"
 	_ "github.com/kuadrant/dns-operator/internal/provider/google"
 	_ "github.com/kuadrant/dns-operator/internal/provider/inmemory"
+	"github.com/kuadrant/dns-operator/internal/version"
 	//+kubebuilder:scaffold:imports
 )
 
 var (
 	scheme   = runtime.NewScheme()
 	setupLog = ctrl.Log.WithName("setup")
+	gitSHA   string // pass ldflag here to display gitSHA hash
+	dirty    string // must be string as passed in by ldflag to determine display .
 )
 
 const (
@@ -62,6 +65,10 @@ func init() {
 	//+kubebuilder:scaffold:scheme
 }
 
+func printControllerMetaInfo() {
+	setupLog.Info("build information", "version", version.Version, "commit", gitSHA, "dirty", dirty)
+}
+
 func main() {
 	var metricsAddr string
 	var enableLeaderElection bool
@@ -92,6 +99,8 @@ func main() {
 
 	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
 
+	printControllerMetaInfo()
+
 	var watchNamespaces = "WATCH_NAMESPACES"
 	defaultOptions := ctrl.Options{
 		Scheme:                 scheme,

hack/check-git-dirty.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+if ! command -v git &>/dev/null 
+then
+    echo "git not found..." >&2
+    exit 1
+fi
+
+if output=$(git diff --stat 2>/dev/null)
+then
+[ -n "$output" ] && echo "true" || echo "false"
+else
+    # Not a git repository
+    exit 1
+fi

internal/version/version.go

@@ -0,0 +1,21 @@
+/*
+Copyright 2021 Red Hat, Inc.
+
+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 version
+
+var (
+	// This variable is dependent on what the current release is e.g. if it is v0.10.0 then this variable, outside of releases, will be v0.10.1-dev .
+	Version = "0.4.0-dev" // Change as versions are released
+)