add pgpool2 version metric

.promu.yml

@@ -1,6 +1,5 @@
-verbose: true
 go:
-    version: 1.16
+    version: 1.20.4
     cgo: false
 repository:
     path: github.com/pgpool/pgpool2_exporter
@@ -17,4 +16,4 @@ build:
         -X github.com/prometheus/common/version.BuildDate={{date "20060102-15:04:05"}}
 tarball:
     files:
-        - LICENSE
+        - LICENSE

Makefile

@@ -1,7 +1,7 @@
 GO     := go
 GOPATH := $(firstword $(subst :, ,$(shell $(GO) env GOPATH)))
 
-PROMU       ?= $(GOPATH)/bin/promu
+PROMU       ?= $(GOPATH)/bin/promu -v
 pkgs         = $(shell $(GO) list ./... | grep -v /vendor/)
 
 PREFIX                  ?= $(shell pwd)
@@ -12,15 +12,19 @@ DOCKER_IMAGE_NAME       ?= pgpool2_exporter
 DOCKER_IMAGE_TAG        ?= $(subst /,-,$(shell git rev-parse --abbrev-ref HEAD))
 
 
-build: promu
+build: clean promu
 	@echo ">> building binaries"
 	@$(PROMU) build --prefix $(PREFIX)
 
 crossbuild: promu
 	@echo ">> building cross-platform binaries"
 	@$(PROMU) crossbuild
 
-promu:
+get-promu: 
+	@echo ">> downloading promu"
+	go get github.com/prometheus/promu
+
+promu: get-promu
 	@GOOS=$(shell uname -s | tr A-Z a-z) \
 	GOARCH=$(subst x86_64,amd64,$(patsubst i%86,386,$(shell uname -m))) \
 	$(GO) install github.com/prometheus/promu
@@ -33,8 +37,16 @@ tarballs: crossbuild
 	@echo ">> building release tarballs"
 	@$(PROMU) crossbuild tarballs
 
-docker:
+docker: build
 	@echo ">> building docker image"
 	@docker build -t "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG)" .
 
-.PHONY: promu build crossbuild tarball tarballs docker
+push: docker
+	@echo ">> pushing docker image to registry"
+	@docker image push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG)"
+
+clean:
+	@echo ">> cleaning up build output"
+	rm -f $(PREFIX)/pgpool2_exporter
+
+.PHONY: promu clean build crossbuild tarball tarballs docker

cmd/pgpool2_exporter/main.go

@@ -12,7 +12,7 @@ import (
 	"github.com/prometheus/common/promlog"
 	"github.com/prometheus/common/promlog/flag"
 	"github.com/prometheus/common/version"
-	"gopkg.in/alecthomas/kingpin.v2"
+	"github.com/alecthomas/kingpin/v2"
 
 	exp "github.com/pgpool/pgpool2_exporter"
 )

go.mod

@@ -1,39 +1,37 @@
 module github.com/pgpool/pgpool2_exporter
 
-go 1.17
+go 1.20
 
 require (
+	github.com/alecthomas/kingpin/v2 v2.3.2
 	github.com/blang/semver v3.5.1+incompatible
-	github.com/go-kit/log v0.2.0
-	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/go-kit/log v0.2.1
+	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/lib/pq v1.10.2
-	github.com/prometheus/client_golang v1.12.0
-	github.com/prometheus/common v0.32.1
-	github.com/prometheus/procfs v0.7.3 // indirect
-	github.com/stretchr/testify v1.7.0 // indirect
-	golang.org/x/sys v0.0.0-20220114195835-da31bd327af9 // indirect
-	google.golang.org/protobuf v1.27.1 // indirect
-	gopkg.in/alecthomas/kingpin.v2 v2.2.6
-	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+	github.com/prometheus/client_golang v1.15.1
+	github.com/prometheus/common v0.44.0
+	github.com/prometheus/procfs v0.9.0 // indirect
+	github.com/stretchr/testify v1.8.4 // indirect
+	golang.org/x/sys v0.9.0 // indirect
+	google.golang.org/protobuf v1.30.0 // indirect
 )
 
 require (
 	github.com/Masterminds/semver v1.5.0 // indirect
-	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 // indirect
 	github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/cespare/xxhash/v2 v2.1.2 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
 	github.com/go-logfmt/logfmt v0.5.1 // indirect
-	github.com/google/go-cmp v0.5.6 // indirect
 	github.com/google/go-github/v25 v25.1.3 // indirect
-	github.com/google/go-querystring v1.1.0 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
+	github.com/google/go-querystring v1.0.0 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
-	github.com/prometheus/client_model v0.2.0 // indirect
-	github.com/prometheus/promu v0.13.0 // indirect
-	go.uber.org/atomic v1.9.0 // indirect
-	golang.org/x/net v0.0.0-20220121210141-e204ce36a2ba // indirect
-	golang.org/x/oauth2 v0.0.0-20211104180415-d3ed0bb246c8 // indirect
+	github.com/prometheus/client_model v0.4.0 // indirect
+	github.com/prometheus/promu v0.15.0 // indirect
+	github.com/xhit/go-str2duration/v2 v2.1.0 // indirect
+	go.uber.org/atomic v1.11.0 // indirect
+	golang.org/x/net v0.11.0 // indirect
+	golang.org/x/oauth2 v0.9.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 )