From 05ad0f1f880198608a15bc1b81ae216f26b43430 Mon Sep 17 00:00:00 2001 From: Adora Laura Kalb Date: Thu, 11 Jul 2024 09:57:48 +0200 Subject: [PATCH] initial commit --- .gitignore | 30 +++++ .woodpecker/docker-deploy.yml | 43 ++++++++ .woodpecker/golang-test.yml | 9 ++ .woodpecker/readme.md | 6 + CHANGELOG.md | 35 ++++++ CONTRIBUTING.md | 17 +++ Dockerfile | 31 ++++++ LICENSE | 201 ++++++++++++++++++++++++++++++++++ MAINTAINERS.md | 1 + Makefile | 3 + README.md | 68 ++++++++++++ cache/cache.go | 93 ++++++++++++++++ cache/cache_test.go | 49 +++++++++ collector/collector.go | 138 +++++++++++++++++++++++ docker-compose.yml | 8 ++ go.mod | 33 ++++++ go.sum | 77 +++++++++++++ helpers/helpers.go | 25 +++++ main.go | 165 ++++++++++++++++++++++++++++ models/api_response.go | 41 +++++++ 20 files changed, 1073 insertions(+) create mode 100644 .gitignore create mode 100644 .woodpecker/docker-deploy.yml create mode 100644 .woodpecker/golang-test.yml create mode 100644 .woodpecker/readme.md create mode 100644 CHANGELOG.md create mode 100644 CONTRIBUTING.md create mode 100644 Dockerfile create mode 100644 LICENSE create mode 100644 MAINTAINERS.md create mode 100644 Makefile create mode 100644 README.md create mode 100644 cache/cache.go create mode 100644 cache/cache_test.go create mode 100644 collector/collector.go create mode 100644 docker-compose.yml create mode 100644 go.mod create mode 100644 go.sum create mode 100644 helpers/helpers.go create mode 100644 main.go create mode 100644 models/api_response.go diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..ed0be89 --- /dev/null +++ b/.gitignore @@ -0,0 +1,30 @@ +# If you prefer the allow list template instead of the deny list, see community template: +# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore +# +# Binaries for programs and plugins +*.exe +*.exe~ +*.dll +*.so +*.dylib + +# Test binary, built with `go test -c` +*.test + +# Output of the go coverage tool, specifically when used with LiteIDE +*.out + +# Dependency directories (remove the comment below to include it) +# vendor/ + +# Go workspace file +go.work + +# vscode Go debugging files +__debug_* +template-exporter +bin/ + +# vscode editor config +.vscode/ + diff --git a/.woodpecker/docker-deploy.yml b/.woodpecker/docker-deploy.yml new file mode 100644 index 0000000..dc5ca9e --- /dev/null +++ b/.woodpecker/docker-deploy.yml @@ -0,0 +1,43 @@ +when: + - event: [pull_request, tag] + +# Change this when using template +variables: + - &DOCKER_USERNAME 'adoralaura' + - &DOCKER_REPOSITORY 'adoralaura/template-exporter' + - &DOCKER_REGISTRY 'https://index.docker.io/v1/' + +# Necessary Secrets: +# DOCKERHUB_TOKEN: https://hub.docker.com/settings/security -> New Access-Token -> Read, Write + +steps: + docker-deploy-pr: + when: + - event: pull_request + image: woodpeckerci/plugin-docker-buildx + settings: + dockerfile: Dockerfile + platforms: linux/arm/v7,linux/arm64/v8,linux/amd64 + repo: *DOCKER_REPOSITORY + registry: *DOCKER_REGISTRY + tag: pr-${CI_COMMIT_PULL_REQUEST} + username: *DOCKER_USERNAME + password: + from_secret: dockerhub_token + + + docker-deploy-tag: + when: + event: tag + image: woodpeckerci/plugin-docker-buildx + settings: + dockerfile: Dockerfile + platforms: linux/arm/v7,linux/arm64/v8,linux/amd64 + repo: *DOCKER_REPOSITORY + registry: *DOCKER_REGISTRY + auto_tag: true + username: *DOCKER_USERNAME + password: + from_secret: dockerhub_token + + diff --git a/.woodpecker/golang-test.yml b/.woodpecker/golang-test.yml new file mode 100644 index 0000000..e825a0f --- /dev/null +++ b/.woodpecker/golang-test.yml @@ -0,0 +1,9 @@ +when: + - event: push + +steps: + test: + image: golang:1.22-bullseye + commands: + - go mod download + - go test -v ./... diff --git a/.woodpecker/readme.md b/.woodpecker/readme.md new file mode 100644 index 0000000..e769594 --- /dev/null +++ b/.woodpecker/readme.md @@ -0,0 +1,6 @@ +# Woodpecker CI Directory +Please lint the woodpecker configs in this directory before committing! + +```shell +woodpecker-cli lint .woodpecker/*.yml +``` diff --git a/CHANGELOG.md b/CHANGELOG.md new file mode 100644 index 0000000..de92a4f --- /dev/null +++ b/CHANGELOG.md @@ -0,0 +1,35 @@ +# Changelog + +All notable changes to this project will be documented in this file. + +The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), +and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). + +## [Unreleased] +### Changed +- asd + +## [0.2.0] - 1970-01-01 +### ⚠️ Breaking Changes +- asd + +### Changed +- asd + +## [0.1.1] - 1970-01-01 +### Fixed +- asd + +## [0.1.0] - 1970-01-01 + +### Added +- This CHANGELOG file to document all significant changes +- LICENSE +- CONTRIBUTING guidelines +- MAINTAINERS file +- minimal implementation of the exporter + +[unreleased]: https://code.lila.network/adoralaura/template-exporter/compare/0.2.0...HEAD +[0.2.0]: https://code.lila.network/adoralaura/template-exporter/compare/0.1.1...0.2.0 +[0.1.1]: https://code.lila.network/adoralaura/template-exporter/compare/0.1.0...0.1.1 +[0.1.0]: https://code.lila.network/adoralaura/template-exporter/releases/tag/0.1.0 diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md new file mode 100644 index 0000000..fbbc679 --- /dev/null +++ b/CONTRIBUTING.md @@ -0,0 +1,17 @@ +# Contributing + +I use my own [Forgejo Instance](https://code.lila.network) to manage issues and pull requests. + +* If you have a trivial fix or improvement, go ahead and create a pull request, + addressing (with `@...`) the maintainer of this repository (see + [MAINTAINERS.md](MAINTAINERS.md)) in the description of the pull request. + +* If you plan to do something more involved, first please [send me a mail]( mailto:adora@lila.network?subject=%5Btemplate-exporter%5D). + +# What to contribute + +The best way to help without speaking a lot of Go would be to share your +configuration, alerts, dashboards, and recording rules. If you have something +that works and is not in the repository, please pay it forward and +share what works. + diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..10272ba --- /dev/null +++ b/Dockerfile @@ -0,0 +1,31 @@ +FROM golang:1.22-bullseye AS dev + +COPY . /var/app +WORKDIR /var/app + + +ENV GO111MODULE="on" \ + CGO_ENABLED=0 \ + GOOS=linux + +EXPOSE 80 +ENTRYPOINT ["sh"] + + +FROM dev as build + +RUN DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends --assume-yes ca-certificates +RUN go mod download && go mod verify +RUN go build -o template-exporter main.go +RUN chmod +x template-exporter + + +FROM gcr.io/distroless/static-debian12 AS prod + +WORKDIR /app +COPY --from=build /var/app/template-exporter /bin/ + +LABEL maintainer="Adora Laura Kalb " + +EXPOSE 43609 +ENTRYPOINT ["/bin/template-exporter"] diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..261eeb9 --- /dev/null +++ b/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/MAINTAINERS.md b/MAINTAINERS.md new file mode 100644 index 0000000..85a37ac --- /dev/null +++ b/MAINTAINERS.md @@ -0,0 +1 @@ +* Adora Laura Kalb @adoralaura diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..e329429 --- /dev/null +++ b/Makefile @@ -0,0 +1,3 @@ + +test: + go test ./... diff --git a/README.md b/README.md new file mode 100644 index 0000000..5a9d029 --- /dev/null +++ b/README.md @@ -0,0 +1,68 @@ +# Template Exporter + +This repository is a template repository for @adoralaura. It's used to easily implement (small) Prometheus Exporters. + +If you run into issues you may inform @adoralaura, but know that you use this template on your own risk! + +# Usage + +## Installation + +Pre-built docker images can be found at [Docker Hub](https://hub.docker.com/r/lauralani/template-exporter). A sample `docker-compose.yml` can be [found here](docker-compose.yml). + +Binaries can be built by cloning this repository and run `go build main.go` with [Golang](https://go.dev/) installed. + +## Running + +Start `template-exporter` as a daemon or from CLI: + +```sh +./template-exporter +``` + +Visit where `203.0.113.8` is the IP +of the NTP server you want to get the score from. + +## Prometheus Configuration + +The URL parameter `target` can be controlled through relabelling. + +Example config: +```YAML +scrape_configs: + - job_name: 'template' + static_configs: + - targets: + - 203.0.113.8 # change this + - 2003:db8::1 # change this + relabel_configs: + - source_labels: [__address__] + target_label: __param_target + - source_labels: [__param_target] + target_label: instance + - target_label: __address__ + replacement: 127.0.0.1:43609 # The template exporter's real hostname:port. +``` + +Similarly to [blackbox_exporter](https://github.com/prometheus/blackbox_exporter), +`template-exporter` is meant to run on a few central machines and can be thought of +like a "Prometheus proxy". + +### TLS and basic authentication + +The Template Exporter does **not** support TLS and basic authentication yet. +This may be added in a future release. + +# Once you have it running + +It can be opaque to get started with all this. To make it +easier for others, please consider contributing back your configurations to +us. + +# Contributing +If you have any ideas, enhancements, bug reports or general questions, please don't hesitate to [create a new issue](https://gitlab.com/adoralaura/template-exporter/-/issues/new). + +If you want to contribute to this project, please read the [Contribution Guidelines](CONTRIBUTING.md) + +# License +This project is available under the [Apache License, Version 2.0](https://www.apache.org/licenses/LICENSE-2.0). See the LICENSE file for more info. diff --git a/cache/cache.go b/cache/cache.go new file mode 100644 index 0000000..dfd64d8 --- /dev/null +++ b/cache/cache.go @@ -0,0 +1,93 @@ +/* +Copyright 2024 Adora Laura Kalb + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package cache + +import ( + "net/netip" + "sync" + "time" +) + +var ( + GlobalScoreCache *ScoreCache + cacheExpiredAfter = 5 * time.Minute +) + +type ServerScore struct { + expiresAt time.Time + Score float64 +} + +type ScoreCache struct { + stop chan struct{} + + mu sync.RWMutex + + scores map[netip.Addr]ServerScore +} + +type CacheMissError struct{} + +func (m *CacheMissError) Error() string { + return "User is not in cache!" +} + +func newCacheMissError() *CacheMissError { + return &CacheMissError{} +} + +func NewScoreCache() *ScoreCache { + lc := &ScoreCache{ + scores: make(map[netip.Addr]ServerScore), + stop: make(chan struct{}), + } + + return lc +} + +func (sc *ScoreCache) Add(score float64, ip netip.Addr, ts time.Time) { + ssc := ServerScore{Score: score, expiresAt: ts.Add(cacheExpiredAfter)} + sc.mu.Lock() + sc.scores[ip] = ssc + sc.mu.Unlock() +} + +func (lc *ScoreCache) Get(ip netip.Addr) (ServerScore, error) { + now := time.Now() + lc.mu.RLock() + + cachedScore, ok := lc.scores[ip] + if !ok { + lc.mu.RUnlock() + return ServerScore{}, newCacheMissError() + } + lc.mu.RUnlock() + + if now.After(cachedScore.expiresAt) { + lc.delete(ip) + return ServerScore{}, newCacheMissError() + } + + return cachedScore, nil +} + +func (lc *ScoreCache) delete(ip netip.Addr) { + lc.mu.Lock() + + delete(lc.scores, ip) + lc.mu.Unlock() +} diff --git a/cache/cache_test.go b/cache/cache_test.go new file mode 100644 index 0000000..e5f1e96 --- /dev/null +++ b/cache/cache_test.go @@ -0,0 +1,49 @@ +/* +Copyright 2024 Adora Laura Kalb + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package cache + +import ( + "net/netip" + "testing" + "time" +) + +func TestCacheGet(t *testing.T) { + const testFloat = 1.23456 + cache := NewScoreCache() + cache.Add(testFloat, netip.MustParseAddr("1.2.3.4"), time.Now().Add(5*time.Minute)) + + score, _ := cache.Get(netip.MustParseAddr("1.2.3.4")) + if score.Score != testFloat { + t.Fatalf("cache.Get(\"1.2.3.4\") = %f, want %f", score.Score, testFloat) + } +} + +func TestCacheMiss(t *testing.T) { + now := time.Now() + const testFloat = 1.23456 + + expiredTime := now.Add(-(time.Minute * 10)) + + cache := NewScoreCache() + cache.Add(testFloat, netip.MustParseAddr("1.2.3.4"), expiredTime) + + _, err := cache.Get(netip.MustParseAddr("1.2.3.4")) + if err == nil { + t.Fatalf("cache.Get(\"1.2.3.4\") = got nil, want error") + } +} diff --git a/collector/collector.go b/collector/collector.go new file mode 100644 index 0000000..893b35d --- /dev/null +++ b/collector/collector.go @@ -0,0 +1,138 @@ +/* +Copyright 2024 Adora Laura Kalb + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package collector + +import ( + "context" + "encoding/json" + "io" + "net/http" + "net/netip" + "time" + + "github.com/go-kit/log" + "github.com/go-kit/log/level" + "github.com/prometheus/client_golang/prometheus" + "golang.adora.codes/template-exporter/cache" + "golang.adora.codes/template-exporter/models" +) + +type Metrics struct { + NtpppolServerScore prometheus.Gauge +} + +type Collector struct { + ctx context.Context + target netip.Addr + logger log.Logger + metrics Metrics +} + +func New(ctx context.Context, target netip.Addr, logger log.Logger, metrics Metrics) *Collector { + return &Collector{ctx: ctx, target: target, logger: logger, metrics: metrics} +} + +// Describe implements Prometheus.Collector. +func (c Collector) Describe(ch chan<- *prometheus.Desc) { + ch <- prometheus.NewDesc("dummy", "dummy", nil, nil) +} + +// Collect implements Prometheus.Collector. +func (c Collector) Collect(ch chan<- prometheus.Metric) { + logger := log.With(c.logger, "module", "scraper") + level.Debug(logger).Log("msg", "Starting scrape") + start := time.Now() + c.collect(ch, logger) + duration := time.Since(start).Seconds() + level.Debug(logger).Log("msg", "Finished scrape", "duration_seconds", duration) +} + +func (c Collector) collect(ch chan<- prometheus.Metric, logger log.Logger) { + score, err := cache.GlobalScoreCache.Get(c.target) + if err == nil { + level.Debug(logger).Log("msg", "Serving score from cache", + "server", c.target.String(), "score", score.Score) + + serverScoreMetric := prometheus.NewDesc("template_server_score", + "Shows the server score currently assigned at template.org", + nil, nil) + + m1 := prometheus.MustNewConstMetric(serverScoreMetric, prometheus.GaugeValue, score.Score) + m1 = prometheus.NewMetricWithTimestamp(time.Now(), m1) + ch <- m1 + return + } + + level.Debug(logger).Log("msg", "Cache miss, querying API", + "server", c.target.String()) + + var serverApiScore float64 = 0 + const apiEndpoint = "https://www.template.org/scores/" + const apiQuery = "/json?limit=1&monitor=24" + + url := apiEndpoint + c.target.String() + apiQuery + + client := &http.Client{} + req, err := http.NewRequest("GET", url, nil) + + if err != nil { + level.Error(logger).Log("msg", "Error sending HTTP request", "url", url, "message", err) + return + } + res, err := client.Do(req) + if err != nil { + level.Error(logger).Log("msg", "Error in HTTP response", "error", err) + return + + } + defer res.Body.Close() + + body, err := io.ReadAll(res.Body) + if err != nil { + level.Error(logger).Log("msg", "Error reading HTTP response body", "error", err) + return + } + + var response models.ApiResponse + + err = json.Unmarshal(body, &response) + if err != nil { + level.Error(logger).Log("msg", "Error unmarshaling JSON body", "error", err) + return + } + + serverApiScore = response.History[0].Score + + cache.GlobalScoreCache.Add(serverApiScore, c.target, time.Now()) + level.Debug(logger).Log("msg", "Added score to cache", + "server", c.target.String(), "score", score.Score) + + // TODO: Test or delete + serverScoreMetric := prometheus.NewDesc("template_server_score", + "Shows the server score currently assigned at template.org", + nil, nil) + + // TODO: Test or delete + //c.metrics.NtpppolServerScore.Add(serverApiScore) + + // TODO: Test or delete + //Write latest value for each metric in the prometheus metric channel. + //Note that you can pass CounterValue, GaugeValue, or UntypedValue types here. + m1 := prometheus.MustNewConstMetric(serverScoreMetric, prometheus.GaugeValue, serverApiScore) + m1 = prometheus.NewMetricWithTimestamp(time.Now(), m1) + ch <- m1 +} diff --git a/docker-compose.yml b/docker-compose.yml new file mode 100644 index 0000000..0523629 --- /dev/null +++ b/docker-compose.yml @@ -0,0 +1,8 @@ +services: + template_exporter: + image: lauralani/template-exporter:latest + restart: always + ports: + - '127.0.0.1:43609:43609' + # Add this to enable debug logging: + # command: --log.level=debug diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..c722330 --- /dev/null +++ b/go.mod @@ -0,0 +1,33 @@ +module golang.adora.codes/template-exporter + +go 1.22.2 + +require ( + github.com/alecthomas/kingpin/v2 v2.4.0 + github.com/go-kit/log v0.2.1 + github.com/prometheus/client_golang v1.19.1 + github.com/prometheus/common v0.55.0 + github.com/prometheus/exporter-toolkit v0.11.0 +) + +require ( + github.com/alecthomas/units v0.0.0-20240626203959-61d1e3462e30 // indirect + github.com/beorn7/perks v1.0.1 // indirect + github.com/cespare/xxhash/v2 v2.3.0 // indirect + github.com/coreos/go-systemd/v22 v22.5.0 // indirect + github.com/go-logfmt/logfmt v0.6.0 // indirect + github.com/jpillora/backoff v1.0.0 // indirect + github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect + github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f // indirect + github.com/prometheus/client_model v0.6.1 // indirect + github.com/prometheus/procfs v0.15.1 // indirect + github.com/xhit/go-str2duration/v2 v2.1.0 // indirect + golang.org/x/crypto v0.25.0 // indirect + golang.org/x/net v0.27.0 // indirect + golang.org/x/oauth2 v0.21.0 // indirect + golang.org/x/sync v0.7.0 // indirect + golang.org/x/sys v0.22.0 // indirect + golang.org/x/text v0.16.0 // indirect + google.golang.org/protobuf v1.34.2 // indirect + gopkg.in/yaml.v2 v2.4.0 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..8a3b6fa --- /dev/null +++ b/go.sum @@ -0,0 +1,77 @@ +github.com/alecthomas/kingpin/v2 v2.4.0 h1:f48lwail6p8zpO1bC4TxtqACaGqHYA22qkHjHpqDjYY= +github.com/alecthomas/kingpin/v2 v2.4.0/go.mod h1:0gyi0zQnjuFk8xrkNKamJoyUo382HRL7ATRpFZCw6tE= +github.com/alecthomas/units v0.0.0-20240626203959-61d1e3462e30 h1:t3eaIm0rUkzbrIewtiFmMK5RXHej2XnoXNhxVsAYUfg= +github.com/alecthomas/units v0.0.0-20240626203959-61d1e3462e30/go.mod h1:fvzegU4vN3H1qMT+8wDmzjAcDONcgo2/SZ/TyfdUOFs= +github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM= +github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw= +github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs= +github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs= +github.com/coreos/go-systemd/v22 v22.5.0 h1:RrqgGjYQKalulkV8NGVIfkXQf6YYmOyiJKk8iXXhfZs= +github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc= +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= 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h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk= +github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY= +github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE= +github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA= +github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ= +github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f h1:KUppIJq7/+SVif2QVs3tOP0zanoHgBEVAwHxUSIzRqU= +github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U= +github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM= +github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= +github.com/prometheus/client_golang v1.19.1 h1:wZWJDwK+NameRJuPGDhlnFgx8e8HN3XHQeLaYJFJBOE= +github.com/prometheus/client_golang v1.19.1/go.mod h1:mP78NwGzrVks5S2H6ab8+ZZGJLZUq1hoULYBAYBw1Ho= +github.com/prometheus/client_model v0.6.1 h1:ZKSh/rekM+n3CeS952MLRAdFwIKqeY8b62p8ais2e9E= +github.com/prometheus/client_model v0.6.1/go.mod h1:OrxVMOVHjw3lKMa8+x6HeMGkHMQyHDk9E3jmP2AmGiY= +github.com/prometheus/common v0.55.0 h1:KEi6DK7lXW/m7Ig5i47x0vRzuBsHuvJdi5ee6Y3G1dc= +github.com/prometheus/common v0.55.0/go.mod h1:2SECS4xJG1kd8XF9IcM1gMX6510RAEL65zxzNImwdc8= +github.com/prometheus/exporter-toolkit v0.11.0 h1:yNTsuZ0aNCNFQ3aFTD2uhPOvr4iD7fdBvKPAEGkNf+g= +github.com/prometheus/exporter-toolkit v0.11.0/go.mod h1:BVnENhnNecpwoTLiABx7mrPB/OLRIgN74qlQbV+FK1Q= +github.com/prometheus/procfs v0.15.1 h1:YagwOFzUgYfKKHX6Dr+sHT7km/hxC76UB0learggepc= +github.com/prometheus/procfs v0.15.1/go.mod h1:fB45yRUv8NstnjriLhBQLuOUt+WW4BsoGhij/e3PBqk= +github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ= +github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog= +github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= +github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw= +github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo= +github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA= +github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg= +github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU= +github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo= +github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg= +github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY= +github.com/xhit/go-str2duration/v2 v2.1.0 h1:lxklc02Drh6ynqX+DdPyp5pCKLUQpRT8bp8Ydu2Bstc= +github.com/xhit/go-str2duration/v2 v2.1.0/go.mod h1:ohY8p+0f07DiV6Em5LKB0s2YpLtXVyJfNt1+BlmyAsU= +golang.org/x/crypto v0.25.0 h1:ypSNr+bnYL2YhwoMt2zPxHFmbAN1KZs/njMG3hxUp30= +golang.org/x/crypto v0.25.0/go.mod h1:T+wALwcMOSE0kXgUAnPAHqTLW+XHgcELELW8VaDgm/M= +golang.org/x/net v0.27.0 h1:5K3Njcw06/l2y9vpGCSdcxWOYHOUk3dVNGDXN+FvAys= +golang.org/x/net v0.27.0/go.mod h1:dDi0PyhWNoiUOrAS8uXv/vnScO4wnHQO4mj9fn/RytE= +golang.org/x/oauth2 v0.21.0 h1:tsimM75w1tF/uws5rbeHzIWxEqElMehnc+iW793zsZs= +golang.org/x/oauth2 v0.21.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI= +golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M= +golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk= +golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI= +golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA= +golang.org/x/text v0.16.0 h1:a94ExnEXNtEwYLGJSIUxnWoxoRz/ZcCsV63ROupILh4= +golang.org/x/text v0.16.0/go.mod h1:GhwF1Be+LQoKShO3cGOHzqOgRrGaYc9AvblQOmPVHnI= +google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg= +google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw= +gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk= +gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q= +gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY= +gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ= +gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= +gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= +gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= diff --git a/helpers/helpers.go b/helpers/helpers.go new file mode 100644 index 0000000..98ccb04 --- /dev/null +++ b/helpers/helpers.go @@ -0,0 +1,25 @@ +/* +Copyright 2024 Adora Laura Kalb + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package helpers + +import ( + "time" +) + +func UnixToTime(i int64) time.Time { + return time.Unix(i, 0) +} diff --git a/main.go b/main.go new file mode 100644 index 0000000..4307caf --- /dev/null +++ b/main.go @@ -0,0 +1,165 @@ +/* +Copyright 2024 Adora Laura Kalb + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package main + +import ( + "net/http" + "net/netip" + "os" + "time" + + "github.com/alecthomas/kingpin/v2" + "github.com/go-kit/log" + "github.com/go-kit/log/level" + "github.com/prometheus/client_golang/prometheus" + "github.com/prometheus/client_golang/prometheus/promauto" + "github.com/prometheus/client_golang/prometheus/promhttp" + "github.com/prometheus/common/promlog" + "github.com/prometheus/common/promlog/flag" + "github.com/prometheus/common/version" + "github.com/prometheus/exporter-toolkit/web" + webflag "github.com/prometheus/exporter-toolkit/web/kingpinflag" + "golang.adora.codes/template-exporter/cache" + "golang.adora.codes/template-exporter/collector" +) + +const ( + namespace = "template" + appVersion = "0.2.0" +) + +var ( + metricsPath = kingpin.Flag( + "web.telemetry-path", + "Path under which to expose metrics.", + ).Default("/metrics").String() + //appListenIP = kingpin.Flag("web.listen-address", "Addresses on which to expose metrics and web interface").Default(":43609").String() + toolkitFlags = webflag.AddFlags(kingpin.CommandLine, ":43609") + + // Metrics about the SNMP exporter itself. + templateRequestErrors = promauto.NewCounter( + prometheus.CounterOpts{ + Namespace: namespace, + Name: "request_errors_total", + Help: "Errors in requests to the SNMP exporter", + }, + ) +) + +func handler(w http.ResponseWriter, r *http.Request, logger log.Logger, exporterMetrics collector.Metrics) { + + // /metrics&target=2003%3Adb8%3A%3A1 + // /metrics&target=1.2.3.4 + query := r.URL.Query() + + target := query.Get("target") + if len(query["target"]) != 1 || target == "" { + http.Error(w, "'target' parameter must be specified once", http.StatusBadRequest) + templateRequestErrors.Inc() + return + } + + targetIP, ipError := netip.ParseAddr(target) + if ipError != nil { + http.Error(w, "'target' parameter must be a valid IPv4/IPv6 address", http.StatusBadRequest) + templateRequestErrors.Inc() + return + } + + logger = log.With(logger, "target", target) + registry := prometheus.NewRegistry() + c := collector.New(r.Context(), targetIP, logger, exporterMetrics) + registry.MustRegister(c) + // Delegate http serving to Prometheus client library, which will call collector.Collect. + h := promhttp.HandlerFor(registry, promhttp.HandlerOpts{}) + h.ServeHTTP(w, r) +} + +func main() { + version.Version = appVersion + promlogConfig := &promlog.Config{} + flag.AddFlags(kingpin.CommandLine, promlogConfig) + kingpin.Version(version.Print("template_exporter")) + kingpin.HelpFlag.Short('h') + kingpin.Parse() + logger := promlog.New(promlogConfig) + + cache.GlobalScoreCache = cache.NewScoreCache() + + level.Info(logger).Log("msg", "Starting template_exporter", "version", appVersion) + level.Info(logger).Log("build_context", version.BuildContext()) + + exporterMetrics := collector.Metrics{ + NtpppolServerScore: promauto.NewGauge( + prometheus.GaugeOpts{ + Namespace: namespace, + Name: "server_score", + Help: "Current template server score", + }, + ), + } + + http.HandleFunc(*metricsPath, func(w http.ResponseWriter, r *http.Request) { + handler(w, r, logger, exporterMetrics) + }) + + metricsPathValue := *metricsPath + + if *metricsPath != "/" && *metricsPath != "" { + landingConfig := web.LandingConfig{ + Name: "template Exporter", + Description: "Prometheus Exporter for SNMP targets", + Version: version.Info(), + Form: web.LandingForm{ + Action: metricsPathValue, + Inputs: []web.LandingFormInput{ + { + Label: "Target", + Type: "text", + Name: "target", + Placeholder: "X.X.X.X/[::X]", + Value: "::1", + }, + }, + }, + Links: []web.LandingLinks{ + { + Address: *metricsPath, + Text: "Metrics", + }, + }, + } + + landingPage, err := web.NewLandingPage(landingConfig) + if err != nil { + level.Error(logger).Log("err", err) + os.Exit(1) + } + http.Handle("/", landingPage) + } + + srv := &http.Server{ + ReadHeaderTimeout: 15 * time.Second, + ReadTimeout: 15 * time.Second, + WriteTimeout: 10 * time.Second, + IdleTimeout: 30 * time.Second, + } + if err := web.ListenAndServe(srv, toolkitFlags, logger); err != nil { + level.Error(logger).Log("msg", "Error starting HTTP server", "err", err) + os.Exit(1) + } +} diff --git a/models/api_response.go b/models/api_response.go new file mode 100644 index 0000000..014ee77 --- /dev/null +++ b/models/api_response.go @@ -0,0 +1,41 @@ +/* +Copyright 2024 Adora Laura Kalb + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package models + +import "time" + +type ApiResponse struct { + History []ApiResponseHistory `json:"history"` + Monitors []struct { + ID int `json:"id"` + Name string `json:"name"` + Type string `json:"type"` + Timestamp time.Time `json:"ts"` + Score float64 `json:"score"` + Status string `json:"status"` + } `json:"monitors"` + Server struct { + IP string `json:"ip"` + } `json:"server"` +} + +type ApiResponseHistory struct { + TimestampInt int64 `json:"ts"` + Step int `json:"step"` + Score float64 `json:"score"` + MonitorID int `json:"monitor_id"` +}