done lvm_exporter

.circleci/config.yml

@@ -0,0 +1,70 @@
+---
+version: 2.1
+
+executors:
+  # Whenever the Go version is updated here, .promu.yml should also be updated.
+  golang:
+    docker:
+      - image: circleci/golang:1.15
+
+jobs:
+  test:
+    executor: golang
+    steps:
+      - checkout
+      - run: make
+
+  build:
+    executor: golang
+    working_directory: /home/circleci/.go_workspace/src/github.com/ghostiam/lvm_exporter
+
+    steps:
+      - setup_remote_docker:
+          version: 18.09.3
+      - checkout
+      - run: make promu
+      - run: promu crossbuild
+      - persist_to_workspace:
+          root: .
+          paths:
+            - .build
+      - store_artifacts:
+          path: .build
+          destination: /build
+
+  release_tags:
+    executor: golang
+
+    steps:
+      - checkout
+      - attach_workspace:
+          at: .
+      - run: make promu
+      - run: promu crossbuild tarballs
+      - run: promu checksum .tarballs
+      - run: promu release .tarballs
+      - store_artifacts:
+          path: .tarballs
+          destination: releases
+
+workflows:
+  version: 2
+  lvm_exporter:
+    jobs:
+      - test:
+          filters:
+            tags:
+              only: /.*/
+      - build:
+          filters:
+            tags:
+              only: /.*/
+      - release_tags:
+          requires:
+            - test
+            - build
+          filters:
+            tags:
+              only: /^v[0-9]+(\.[0-9]+){2}(-.+|[^-.]*)$/
+            branches:
+              ignore: /.*/

.gitignore

@@ -0,0 +1,35 @@
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+dependencies-stamp
+/lvm_exporter
+/.build
+/.deps
+/.release
+/.tarballs
+
+# Intellij
+
+/.idea
+*.iml
+
+/vendor

.golangci.yml

@@ -0,0 +1,50 @@
+run:
+  tests: true
+
+output:
+  print-issued-lines: true
+
+linters:
+  enable:
+    - bodyclose
+    - exhaustive
+    - exportloopref
+    - goconst
+    - gocritic
+    - goerr113
+    - goimports
+    - golint
+    - gosimple
+    - govet
+    - nakedret
+    - rowserrcheck
+    - staticcheck
+    - unconvert
+    - whitespace
+
+issues:
+  exclude-rules:
+    - path: _test.go
+      linters:
+        - errcheck
+
+linters-settings:
+  govet:
+    enable-all: true
+
+  errcheck:
+    exclude: scripts/errcheck_excludes.txt
+
+  whitespace:
+    multi-if: false   # Enforces newlines (or comments) after every multi-line if statement
+    multi-func: false # Enforces newlines (or comments) after every multi-line function signature
+
+  exhaustive:
+  # indicates that switch statements are to be considered exhaustive if a
+  # 'default' case is present, even if all enum members aren't listed in the
+  # switch
+  # default-signifies-exhaustive: false
+
+  nakedret:
+    # make an issue if func has more lines of code than this setting and it has naked returns; default is 30
+    max-func-lines: 1

.promu.yml

@@ -0,0 +1,26 @@
+verbose: false
+go:
+  # Whenever the Go version is updated here, .travis.yml and
+  # .circle/config.yml should also be updated.
+  version: 1.15
+  cgo: false
+repository:
+  path: github.com/ghostiam/lvm_exporter
+build:
+  binaries:
+    - name: lvm_exporter
+  prefix: .
+  flags: -a -tags netgo
+  ldflags: |
+    -X {{repoPath}}/vendor/github.com/prometheus/common/version.Version={{.Version}}
+    -X {{repoPath}}/vendor/github.com/prometheus/common/version.Revision={{.Revision}}
+    -X {{repoPath}}/vendor/github.com/prometheus/common/version.Branch={{.Branch}}
+    -X {{repoPath}}/vendor/github.com/prometheus/common/version.BuildUser={{user}}@{{host}}
+    -X {{repoPath}}/vendor/github.com/prometheus/common/version.BuildDate={{date "20060102-15:04:05"}}
+tarball:
+  files:
+    - LICENSE
+crossbuild:
+  platforms:
+    - linux/amd64
+    - linux/386

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 Vladislav Fursov
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Makefile

@@ -0,0 +1,59 @@
+GO    := go
+PROMU := $(GOPATH)/bin/promu
+
+PREFIX              ?= $(shell pwd)
+BIN_DIR             ?= $(shell pwd)
+
+GOLANGCI_LINT := $(GOPATH)/bin/golangci-lint
+GOLANGCI_LINT_VERSION ?= v1.31.0
+
+all: format lint build test
+
+style:
+	@echo ">> checking code style"
+	@! gofmt -d $(shell find . -path ./vendor -prune -o -name '*.go' -print) | grep '^'
+
+test:
+	@echo ">> running tests"
+	@$(GO) test -short -race ./...
+
+format:
+	@echo ">> formatting code"
+	@$(GO) fmt $(pkgs)
+
+vet:
+	@echo ">> vetting code"
+	@$(GO) vet $(pkgs)
+
+build: $(PROMU)
+	@echo ">> building binaries"
+	$(PROMU) build --prefix $(PREFIX)
+
+crossbuild: $(PROMU)
+	@echo ">> crossbuilding binaries"
+	$(PROMU) crossbuild -v
+
+tarball: $(PROMU)
+	@echo ">> building release tarball"
+	@$(PROMU) tarball --prefix $(PREFIX) $(BIN_DIR)
+
+lint: $(GOLANGCI_LINT)
+	@echo ">> running golangci-lint"
+	GO111MODULE=on $(GO) list -e -compiled -test=true -export=false -deps=true -find=false -tags= -- ./... > /dev/null
+	GO111MODULE=on $(GOLANGCI_LINT) run --sort-results ./...
+
+# deps
+promu: $(PROMU)
+
+$(PROMU):
+	@GOOS=$(shell uname -s | tr A-Z a-z) \
+		GOARCH=$(subst x86_64,amd64,$(patsubst i%86,386,$(shell uname -m))) \
+		$(GO) get -u github.com/prometheus/promu
+
+$(GOLANGCI_LINT):
+	mkdir -p $(GOPATH)/bin
+	curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/$(GOLANGCI_LINT_VERSION)/install.sh \
+		| sed -e '/install -d/d' \
+		| sh -s -- -b $(GOPATH)/bin $(GOLANGCI_LINT_VERSION)
+
+.PHONY: all style format build crossbuild test vet tarball promu lint $(PROMU) $(GOLANGCI_LINT)

collector/collector.go

@@ -0,0 +1,93 @@
+//go:generate go run ../generator/fields_generator.go -o fields_gen.go
+package collector
+
+import (
+	"os/exec"
+	"strings"
+
+	"github.com/go-kit/kit/log"
+	"github.com/go-kit/kit/log/level"
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+type Collector struct {
+	cfg    *Config
+	logger log.Logger
+}
+
+type Config struct {
+}
+
+func New(cfg *Config, logger log.Logger) (*Collector, error) {
+	if cfg == nil {
+		cfg = &Config{}
+	}
+
+	return &Collector{
+		cfg:    cfg,
+		logger: logger,
+	}, nil
+}
+
+func (c *Collector) Describe(ch chan<- *prometheus.Desc) {}
+
+func (c *Collector) Collect(ch chan<- prometheus.Metric) {
+	err := execToMetrics("lvs", ch)
+	if err != nil {
+		level.Error(c.logger).Log("err", err)
+	}
+
+	err = execToMetrics("vgs", ch)
+	if err != nil {
+		level.Error(c.logger).Log("err", err)
+	}
+
+	err = execToMetrics("pvs", ch)
+	if err != nil {
+		level.Error(c.logger).Log("err", err)
+	}
+}
+
+func execToMetrics(exe string, ch chan<- prometheus.Metric) error {
+	cmd := exec.Command(exe,
+		"--reportformat",
+		"json",
+		"-o",
+		"all",
+		"--units",
+		"B",
+		"--binary",
+	)
+
+	out, err := cmd.Output()
+	if err != nil {
+		return err
+	}
+
+	metrics, err := ReportsToMetrics(out)
+	if err != nil {
+		return err
+	}
+
+	for _, ms := range metrics {
+		var labelsNames, labelsValues []string
+		for _, l := range ms.Labels {
+			labelsNames = append(labelsNames, l.Field)
+			labelsValues = append(labelsValues, l.Value)
+		}
+
+		for _, m := range ms.Metrics {
+			gauge := prometheus.NewGaugeVec(prometheus.GaugeOpts{
+				Namespace:   "lvm",
+				Subsystem:   ms.Namespace,
+				Name:        strings.TrimPrefix(m.Field, ms.Namespace+"_"),
+				Help:        m.Help,
+				ConstLabels: nil,
+			}, labelsNames).WithLabelValues(labelsValues...)
+			gauge.Set(m.Value)
+			ch <- gauge
+		}
+	}
+
+	return nil
+}