Implement releases:

- add GH Actions default/releases workflows: run lint/test on Default, build docker images and binary on Release.
- add goreleaser handler for releases events.
- add git tag into app version string.
- add Dockerfile.
- add docker related commands into README.

.github/workflows/default.yml

@@ -0,0 +1,19 @@
+---
+name: Default
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Run lint
+        run: make lint
+      - name: Run test
+        run: make test

.github/workflows/release.yml

@@ -0,0 +1,47 @@
+---
+name: Release
+
+on:
+  push:
+    tags: [ v* ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Run lint
+        run: make lint
+      - name: Run test
+        run: make test
+
+  build:
+    runs-on: ubuntu-latest
+    needs: test
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Build image
+        run: make docker-build
+      - name: Log in to Docker Hub
+        run: docker login -u ${{ secrets.DOCKER_USERNAME }} -p ${{ secrets.DOCKER_PASSWORD }}
+      - name: Push image to Docker Hub
+        run: make docker-push
+
+  goreleaser:
+    runs-on: ubuntu-latest
+    needs: [ test, build ]
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-go@v2
+        with:
+          go-version: 1.15
+      - uses: goreleaser/goreleaser-action@v2
+        with:
+          version: latest
+          args: release --rm-dist
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.goreleaser.yml

@@ -0,0 +1,15 @@
+builds:
+  - binary: noisia
+    goarch: [amd64]
+    goos:
+      - linux
+archives:
+  - builds: [noisia]
+changelog:
+  sort: asc
+nfpms:
+  - vendor: noisia
+    homepage: https://github.com/lesovsky/noisia
+    maintainer: Alexey Lesovsky
+    description: Harmful workload generator for PostgreSQL
+    formats: [deb]

Dockerfile

@@ -0,0 +1,11 @@
+# stage 1: build
+FROM golang:1.15 as build
+LABEL stage=intermediate
+WORKDIR /app
+COPY . .
+RUN make build
+
+# stage 2: scratch
+FROM scratch as scratch
+COPY --from=build /app/bin/noisia /bin/noisia
+CMD ["noisia"]

Makefile

@@ -1,11 +1,12 @@
 APPNAME = noisia
 
+TAG=$(shell git describe --tags |cut -d- -f1)
 COMMIT=$(shell git rev-parse --short HEAD)
 BRANCH=$(shell git rev-parse --abbrev-ref HEAD)
 
-LDFLAGS = -a -installsuffix cgo -ldflags "-X main.appName=${APPNAME} -X main.gitCommit=${COMMIT} -X main.gitBranch=${BRANCH}"
+LDFLAGS = -a -installsuffix cgo -ldflags "-X main.appName=${APPNAME} -X main.gitTag=${TAG} -X main.gitCommit=${COMMIT} -X main.gitBranch=${BRANCH}"
 
-.PHONY: help clean lint test race build
+.PHONY: help clean dep lint test build build-docker
 
 .DEFAULT_GOAL := help
 
@@ -31,3 +32,12 @@ test: dep ## Run tests
 build: dep ## Build
 	mkdir -p ./bin
 	CGO_ENABLED=0 GOOS=linux GOARCH=${GOARCH} go build ${LDFLAGS} -o bin/${APPNAME} ./cmd
+
+docker-build: ## Build docker image
+	docker build -t lesovsky/${APPNAME}:${TAG} .
+	docker image prune --force --filter label=stage=intermediate
+	docker tag lesovsky/${APPNAME}:${TAG} lesovsky/${APPNAME}:latest
+
+docker-push: ## Push docker image to the registry
+	docker push lesovsky/${APPNAME}:${COMMIT}
+	docker push lesovsky/${APPNAME}:latest

README.md

@@ -14,8 +14,21 @@
 - `failed connections` - exhaust connections pool (other clients can't connect to Postgres) 
 - ...see built-in help for more runtime options.
 
-#### Usage
-Install `golang`, clone the repo and run `make build`. Check `bin/` directory for `noisia` executable. 
+#### Disclaimer
+
+ATTENTION: USE ONLY FOR TESTING PURPOSES, DO NOT EXECUTE NOISIA AGAINST PRODUCTION, RECKLESS USAGE WILL CAUSE PROBLEMS.
+
+DISCLAIMER: THIS SOFTWARE PROVIDED AS-IS WITH NO CARES AND GUARANTEES RELATED TO YOUR DATABASES. USE AT YOUR OWN RISK.
+
+
+#### Installation and usage
+Check out [releases](https://github.com/lesovsky/noisia/releases) page.
+
+#### Using Docker
+```shell script
+docker pull lesovsky/noisia:latest
+docker run --rm -ti lesovsky/noisia:latest noisia --help
+```
 
 #### Using in your own code
 You can import `noisia` and use necessary workloads in your code. Always use contexts to avoid infinite run. See tiny example below:
@@ -44,14 +57,9 @@ func main() {
 ```
 
 #### TODO/Ideas:
-- sequential scans
-
-#### Disclaimer
-
-ATTENTION: USE ONLY FOR TESTING PURPOSES, DO NOT EXECUTE NOISIA AGAINST PRODUCTION, RECKLESS USAGE WILL CAUSE PROBLEMS.
-
-DISCLAIMER: THIS SOFTWARE PROVIDED AS-IS WITH NO CARES AND GUARANTEES RELATED TO YOUR DATABASES. USE AT YOUR OWN RISK.
+If you have any ideas, feel free to open a [discussion](https://github.com/lesovsky/noisia/discussions).
 
+[ ] sequential scans
 
 #### License
 BSD-3. See [LICENSE](LICENSE) for more details.

cmd/main.go

@@ -12,7 +12,7 @@ import (
 )
 
 var (
-	appName, gitCommit, gitBranch string
+	appName, gitTag, gitCommit, gitBranch string
 )
 
 func main() {
@@ -47,7 +47,7 @@ func main() {
 	logger := zerolog.New(zerolog.ConsoleWriter{Out: os.Stdout, TimeFormat: time.RFC3339}).Level(zerolog.InfoLevel).With().Timestamp().Logger()
 
 	if *showVersion {
-		fmt.Printf("%s %s-%s\n", appName, gitCommit, gitBranch)
+		fmt.Printf("%s %s %s-%s\n", appName, gitTag, gitCommit, gitBranch)
 		os.Exit(0)
 	}