add goreleaser, docs

.circleci/config.yml

@@ -14,7 +14,7 @@ jobs:
 
       - run: 
           name: build
-          command: CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags="-w -s" -v -o release/ipvsctl ipvsctl.go
+          command: GOOS=linux GOARCH=amd64 go build -ldflags="-w -s" -v -o release/ipvsctl ipvsctl.go
 
       - save_cache:
           key: go-mod-v4-{{ checksum "go.sum" }}

.gitignore

@@ -13,5 +13,6 @@
 
 *.code-workspace
 *.sh
+dist/
 release/
 .vscode/

.goreleaser.yml

@@ -0,0 +1,22 @@
+before:
+  hooks:
+    - go mod download
+builds:
+  - goos:
+      - linux
+archives:
+  - replacements:
+      linux: Linux
+      386: i386
+      amd64: x86_64
+checksum:
+  name_template: 'checksums.txt'
+snapshot:
+  name_template: "{{ .Tag }}-next"
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - '^docs:'
+      - '^test:'
+      - '^tests:'

Makefile

@@ -1,12 +1,11 @@
-VERSION := `cat VERSION`
 SOURCES ?= $(shell find . -name "*.go" -type f)
 BINARY_NAME = ipvsctl
 
 all: clean lint build
 
 .PHONY: build
 build:
-	GOOS=linux GOARCH=amd64 go build -o release/${BINARY_NAME} -ldflags="-X main.version=${VERSION}" ipvsctl.go
+	GOOS=linux GOARCH=amd64 go build -o dist/${BINARY_NAME} ipvsctl.go
 
 lint:
 	@for file in ${SOURCES} ;  do \
@@ -24,6 +23,9 @@ cover:
 
 .PHONY: clean
 clean:
-	@rm -rf release/*
+	@rm -rf dist/*
 	@rm -f cover.out
 
+.PHONY: release
+release: 
+	goreleaser --snapshot --rm-dist

README.md

@@ -73,13 +73,27 @@ INFO Updated weight to 100 for service tcp://10.1.2.3:80/10.50.0.1:8080
 * Linux
 * ipvs kernel modules installed and loaded
 
+## Install
+
+You can build this as describe below or install one of the versions under the `releases` tab.
+`ipvsctl` makes modifications to the ipvs tables, so it either needs to be run as root or equipped
+with the appropriate capabilities, e.g.:
+
+```bash
+$ chmod +x ipvsctl
+$ sudo cp ipvsctl /usr/local/bin
+$ sudo setcap 'cap_net_admin+eip' /usr/local/bin/ipvsctl 
+```
+
+Caution as this allows any user to modify ipvs tables! Please evaluate whether `sudo` or `setcap` is the right approach for you.
+
 ## Build
 
 This project builds correctly for Linux only.
 
 ```bash
 $ make
-$ release/ipvsctl --version
+$ dist/ipvsctl --version
 0.2.1
 ```
 

ipvsctl.go

@@ -11,7 +11,9 @@ import (
 )
 
 var (
-	version string
+	version = "dev"
+	commit  = "none"
+	date    = "unknown"
 )
 
 func main() {
@@ -27,9 +29,9 @@ func main() {
 	verbose := app.BoolOpt("v verbose", c.Verbose, "Show information. Default: false. False equals to being quiet")
 	paramsHostNetwork := app.BoolOpt("params-network", c.ParamsHostNetwork, "Dynamic parameters. Add every network interface name as resolvable ip address, e.g. net.eth0")
 	paramsHostEnv := app.BoolOpt("params-env", c.ParamsHostNetwork, "Dynamic parameters. Add every environment entry, e.g. env.port=<ENV VAR \"port\">")
-	paramsFiles := make([]string,10)
+	paramsFiles := make([]string, 10)
 	app.StringsOptPtr(&paramsFiles, "params-file", []string{c.ParamsFilesFromEnv}, "Dynamic parameters. Add parameters from yaml or json file.")
-	paramsURLs := make([]string,10)
+	paramsURLs := make([]string, 10)
 	app.StringsOptPtr(&paramsURLs, "params-url", []string{c.ParamsURLsFromEnv}, "Dynamic parameters. Add parameters from yaml or json resource given by URL.")
 
 	app.Command("get", "retrieve ipvs configuration and returns as yaml", cmd.Get)