Add build info to logs

Author: ronensc

Makefile

@@ -97,6 +97,18 @@ endif
 SHELL = /usr/bin/env bash -o pipefail
 .SHELLFLAGS = -ec
 
+BUILD_DATE := $(shell date +%Y-%m-%d\ %H:%M)
+BUILD_TAG_SHA := $(shell git rev-list --abbrev-commit --tags --max-count=1)
+BUILD_TAG_NAME := $(shell git describe --abbrev=0 --tags ${BUILD_TAG_SHA} 2>/dev/null || true)
+BUILD_SHA := $(shell git rev-parse --short HEAD)
+BUILD_VERSION := $(BUILD_TAG_NAME:v%=%)
+ifneq ($(BUILD_SHA), $(BUILD_TAG_SHA))
+	BUILD_VERSION := $(BUILD_VERSION)-$(BUILD_SHA)
+endif
+ifneq ($(shell git status --porcelain),)
+	BUILD_VERSION := $(BUILD_VERSION)-dirty
+endif
+
 .PHONY: all
 all: build
 
@@ -147,7 +159,7 @@ modules: ## Update Go dependencies.
 
 .PHONY: build
 build: modules fmt vet ## Build manager binary.
-	go build -o bin/manager main.go
+	go build -ldflags "-X 'main.BuildVersion=$(BUILD_VERSION)' -X 'main.BuildDate=$(BUILD_DATE)'" -o bin/manager main.go
 
 .PHONY: run
 run: modules manifests fmt vet ## Run a controller from your host.

main.go

@@ -58,8 +58,10 @@ import (
 )
 
 var (
-	scheme   = runtime.NewScheme()
-	setupLog = ctrl.Log.WithName("setup")
+	scheme       = runtime.NewScheme()
+	setupLog     = ctrl.Log.WithName("setup")
+	BuildVersion = "UNKNOWN"
+	BuildDate    = "UNKNOWN"
 )
 
 func init() {
@@ -85,6 +87,7 @@ func main() {
 	zapOptions.BindFlags(flag.CommandLine)
 
 	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&zapOptions)))
+	setupLog.Info("Build info", "version", BuildVersion, "date", BuildDate)
 
 	ctx := ctrl.SetupSignalHandler()