created Dockerfile and Makefile for replayer

Dockerfile.replayer

@@ -0,0 +1,18 @@
+# Build stage
+FROM devopsworks/golang-upx:1.15 AS builder
+ENV GO111MODULE=on \
+    CGO_ENABLED=0 \
+    GOOS=linux \
+    GOARCH=amd64
+COPY . /app
+WORKDIR /app/cmd/slowql-replayer
+RUN make build && \
+    strip ./out/bin/slowql-replayer && \
+    /usr/local/bin/upx -9 ./out/bin/slowql-replayer
+
+# Run stage
+FROM gcr.io/distroless/base-debian10
+COPY --from=builder /app/cmd/slowql-replayer/out/bin /app
+COPY --from=builder /app/slowquery.log /app
+WORKDIR /app
+ENTRYPOINT ["./slowql-replayer"]

cmd/slowql-replayer/Makefile

@@ -0,0 +1,47 @@
+
+GOCMD=go
+GOTEST=$(GOCMD) test
+GOVET=$(GOCMD) vet
+BINARY_NAME=slowql-replayer
+BUILD_DIR=./out/bin/
+BUILD_ROOT=./out
+
+GREEN  := $(shell tput -Txterm setaf 2)
+YELLOW := $(shell tput -Txterm setaf 3)
+WHITE  := $(shell tput -Txterm setaf 7)
+RESET  := $(shell tput -Txterm sgr0)
+
+.PHONY: all build clean
+
+all: help
+
+## Build:
+build: ## Build the Go project
+	mkdir -p ./out/bin
+	GO111MODULE=on $(GOCMD) build -o $(BUILD_DIR)$(BINARY_NAME) .
+	@echo "${GREEN}[*]${RESET} ${BINARY_NAME} successfully built in ${YELLOW}${BUILD_DIR}${BINARY_NAME}${RESET}"
+
+clean: ## Clean all the files and binaries generated by the Makefile
+	rm -rf $(BUILD_ROOT)
+	rm -f ./profile.cov
+
+## Test:
+test: ## Run the tests of the project
+	$(GOTEST) -v -race ./...
+
+coverage: ## Run the tests of the project and export the coverage
+	$(GOTEST) -cover -covermode=count -coverprofile=profile.cov ./...
+	$(GOCMD) tool cover -func profile.cov
+
+## Help:
+help: ## Show this help
+	@echo ''
+	@echo 'Usage:'
+	@echo '  ${YELLOW}make${RESET} ${GREEN}<target>${RESET}'
+	@echo ''
+	@echo 'Targets:'
+	@awk 'BEGIN {FS = ":.*?## "} { \
+		if (/^[a-zA-Z_-]+:.*?##.*$$/) {printf "    ${YELLOW}%-20s${GREEN}%s${RESET}\n", $$1, $$2} \
+		else if (/^## .*$$/) {printf "  ${CYAN}%s${RESET}\n", substr($$1,4)} \
+		}' $(MAKEFILE_LIST)
+

cmd/slowql-replayer/README.md

@@ -4,10 +4,26 @@ A tool to replay queries from a slow query log file.
 
 ## Installation
 
+There is multiple ways to get `slowql-replayer`.
+
+### By using `go install`
+
 ```
 $ go install github.com/devops-works/slowql/cmd/slowql-replayer
 ```
 
+### By cloning the repo and building it
+
+```
+$ git clone https://github.com/devops-works/slowql
+$ cd slowql/cmd/slowql-replayer
+$ make build
+```
+
+### By downloading the pre-built binary
+
+You can find the latest version in the [releases](https://github.com/devops-works/slowql/releases)
+
 ## Usage
 
 ```
@@ -73,6 +89,16 @@ Statistics
   └─ Replayer speed:         -0.0064%
 ```
 
+## Docker
+
+Build the image (you need to be at the root of the repo):
+
+```
+$ docker build -f Dockerfile.replayer -t slowql-replayer
+...
+$ docker run --rm -it slowql-replayer [OPTIONS]
+```
+
 ### Adjustments
 
 #### Speed

cmd/slowql-replayer/main.go

@@ -70,7 +70,7 @@ func main() {
 
 	flag.StringVar(&opt.user, "u", "", "User to use to connect to database")
 	flag.StringVar(&opt.host, "h", "", "Addres of the database, with IP and port")
-	flag.StringVar(&opt.file, "f", "", "Slow query log file to use")
+	flag.StringVar(&opt.file, "f", "./slowquery.log", "Slow query log file to use")
 	flag.StringVar(&opt.kind, "k", "", "Kind of the database (mysql, mariadb...)")
 	flag.StringVar(&opt.database, "db", "", "Name of the database to use")
 	flag.StringVar(&opt.loglvl, "l", "info", "Logging level")