From 9b3e73bd22e65d405ee9408c61dad29285a6f20d Mon Sep 17 00:00:00 2001
From: Andre Ziviani <andrepziviani@gmail.com>
Date: Wed, 29 Mar 2023 16:46:07 -0300
Subject: [PATCH] Initial commit

---
 .github/workflows/release.yml |  74 +++++++++++++
 Dockerfile                    |  18 ++++
 Makefile                      |  96 +++++++++++++++++
 README.md                     |  53 ++++++++-
 exporter/aws.go               |  63 +++++++++++
 exporter/health.go            | 102 ++++++++++++++++++
 exporter/metrics.go           |  81 ++++++++++++++
 exporter/org.go               | 115 ++++++++++++++++++++
 exporter/single.go            |  82 ++++++++++++++
 exporter/types.go             |  30 ++++++
 go.mod                        |  67 ++++++++++++
 go.sum                        | 195 ++++++++++++++++++++++++++++++++++
 main.go                       |  77 ++++++++++++++
 13 files changed, 1052 insertions(+), 1 deletion(-)
 create mode 100644 .github/workflows/release.yml
 create mode 100644 Dockerfile
 create mode 100644 Makefile
 create mode 100644 exporter/aws.go
 create mode 100644 exporter/health.go
 create mode 100644 exporter/metrics.go
 create mode 100644 exporter/org.go
 create mode 100644 exporter/single.go
 create mode 100644 exporter/types.go
 create mode 100644 go.mod
 create mode 100644 go.sum
 create mode 100644 main.go

diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 0000000..c636be7
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,74 @@
+name: Create Release
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Set up Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: 1.19
+
+      - name: Cache Go Modules
+        uses: actions/cache@v3
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.OS }}-go-
+            ${{ runner.OS }}-
+
+      - name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v4
+        with:
+          version: latest
+          args: release --rm-dist
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  push_to_registries:
+    name: Push Docker image to Docker Hub and GitHub Packages
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      
+      - name: Log in to the Container registry
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: |
+            ${{ secrets.DOCKERHUB_USERNAME }}/aws-health-exporter
+            ghcr.io/${{ github.repository }}
+      
+      - name: Build and push Docker images
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..89be564
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,18 @@
+FROM golang:alpine as builder
+
+WORKDIR /app
+
+COPY . .
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags="-w -s" -o aws-health-exporter .
+
+FROM alpine:3.17
+
+ENV HOME /app
+USER 1000:1000
+
+WORKDIR /app
+
+COPY --from=builder /app/aws-health-exporter /bin
+
+ENTRYPOINT ["/bin/aws-health-exporter"]
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..ce3b7ea
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,96 @@
+EXECUTABLE ?= aws-health-exporter
+IMAGE ?= andreziviani/$(EXECUTABLE)
+TAG ?= dev-$(shell git log -1 --pretty=format:"%h")
+
+LD_FLAGS = -X "main.version=$(TAG)"
+GOFILES_NOVENDOR = $(shell find . -type f -name '*.go' -not -path "./vendor/*")
+PKGS=$(shell go list ./... | grep -v /vendor)
+
+.PHONY: _no-target-specified
+_no-target-specified:
+	$(error Please specify the target to make - `make list` shows targets.)
+
+.PHONY: list
+list:
+	@$(MAKE) -pRrn : -f $(MAKEFILE_LIST) 2>/dev/null | awk -v RS= -F: '/^# File/,/^# Finished Make data base/ {if ($$1 !~ "^[#.]") {print $$1}}' | egrep -v -e '^[^[:alnum:]]' -e '^$@$$' | sort
+
+LICENSEI_VERSION = 0.0.7
+bin/licensei: ## Install license checker
+	@mkdir -p ./bin/
+	curl -sfL https://raw.githubusercontent.com/goph/licensei/master/install.sh | bash -s v${LICENSEI_VERSION}
+
+.PHONY: license-check
+license-check: bin/licensei ## Run license check
+	@bin/licensei check
+
+.PHONY: license-cache
+license-cache: bin/licensei ## Generate license cache
+	@bin/licensei cache
+
+all: clean deps fmt vet docker push
+
+clean:
+	go clean -i ./...
+
+deps:
+	go get ./...
+
+fmt:
+	@gofmt -w ${GOFILES_NOVENDOR}
+
+vet:
+	@go vet -composites=false ./...
+
+docker:
+	docker build --rm -t $(IMAGE):$(TAG) .
+
+docker-run:
+	docker run -e AWS_REGION=$${AWS_REGION} -e AWS_SECRET_ACCESS_KEY=$${AWS_SECRET_ACCESS_KEY} -e AWS_SESSION_TOKEN=$${AWS_SESSION_TOKEN} -e AWS_ACCESS_KEY_ID=$${AWS_ACCESS_KEY_ID} -it --rm -p 8080:8080 $(IMAGE):$(TAG)
+
+push:
+	docker push $(IMAGE):$(TAG)
+
+run-dev:
+	go run $(wildcard *.go)
+
+build:
+	go build -o $(EXECUTABLE) $(wildcard *.go)
+
+build-all: fmt lint vet build
+
+misspell: install-misspell
+	misspell -w ${GOFILES_NOVENDOR}
+
+lint: install-golint
+	golint -min_confidence 0.9 -set_exit_status $(PKGS)
+
+install-golint:
+	GOLINT_CMD=$(shell command -v golint 2> /dev/null)
+ifndef GOLINT_CMD
+	go get github.com/golang/lint/golint
+endif
+
+install-misspell:
+	MISSPELL_CMD=$(shell command -v misspell 2> /dev/null)
+ifndef MISSPELL_CMD
+	go get -u github.com/client9/misspell/cmd/misspell
+endif
+
+install-ineffassign:
+	INEFFASSIGN_CMD=$(shell command -v ineffassign 2> /dev/null)
+ifndef INEFFASSIGN_CMD
+	go get -u github.com/gordonklaus/ineffassign
+endif
+
+install-gocyclo:
+	GOCYCLO_CMD=$(shell command -v gocyclo 2> /dev/null)
+ifndef GOCYCLO_CMD
+	go get -u github.com/fzipp/gocyclo
+endif
+
+ineffassign: install-ineffassign
+	ineffassign ${GOFILES_NOVENDOR}
+
+gocyclo: install-gocyclo
+	gocyclo -over 19 ${GOFILES_NOVENDOR}
+
diff --git a/README.md b/README.md
index c440c69..0fbd25e 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,53 @@
 # aws-health-exporter
-Prometheus exporter for AWS Health events that also sends them to Slack
+
+This is a trivial implementation of [AWS AHA][aha-blog] with limited features but without any external dependencies.
+
+**You must have a Business, Enterprise On-Ramp, or Enterprise Support plan from AWS Support to use the AWS Health API. If you call the AWS Health API from an AWS account that doesn't have a Business, Enterprise On-Ramp, or Enterprise Support plan, you receive a SubscriptionRequiredException error.**
+
+This is a restriction imposed by AWS, check [the docs][health-api] for more information.
+
+## Features
+
+- Does not require a database
+- Sends AWS Health events to slack
+- Expose events as Prometheus metrics
+
+## How it works
+
+This exporter checks for new AWS Health events whenever it is scraped and sends them to a slack channel using the same message format as AWS AHA.
+
+If the exporter is running on the Payer account (or with credentials from that account) and [AWS Health Organizational View][health-org] is enabled
+it will monitor events from all accounts, otherwise it will check only the current account.
+
+Only new events will be sent to slack, past events (events that were created/updated before the exporter started) will be ignored.
+
+## How to use
+
+The exporter should be running with the following permissions:
+```
+          "health:DescribeHealthServiceStatusForOrganization",
+          "health:DescribeAffectedAccountsForOrganization",
+          "health:DescribeAffectedEntitiesForOrganization",
+          "health:DescribeEventDetailsForOrganization",
+          "health:DescribeEventsForOrganization",
+          "health:DescribeEventDetails",
+          "health:DescribeEvents",
+          "health:DescribeEventTypes",
+          "health:DescribeAffectedEntities",
+          "organizations:ListAccounts",
+          "organizations:DescribeAccount",
+```
+
+You must specify, at least, the following parameters via command options or environment flags:
+```
+   --slack-token value               Slack token [$SLACK_TOKEN]
+   --slack-channel value             Slack channel id [$SLACK_CHANNEL]
+```
+
+## Helm chart
+
+A helm chart is available [here][chart]
+
+[aha-blog]: https://aws.amazon.com/blogs/mt/aws-health-aware-customize-aws-health-alerts-for-organizational-and-personal-aws-accounts/
+[health-api]: https://docs.aws.amazon.com/health/latest/ug/health-api.html
+[chart]: https://github.com/AndreZiviani/helm-charts/tree/main/charts/aws-health-exporter
diff --git a/exporter/aws.go b/exporter/aws.go
new file mode 100644
index 0000000..a6c35e3
--- /dev/null
+++ b/exporter/aws.go
@@ -0,0 +1,63 @@
+package exporter
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"github.com/aws/aws-sdk-go-v2/aws"
+	"github.com/aws/aws-sdk-go-v2/config"
+)
+
+const (
+	TermOnDemand string = "JRTCKXETXF"
+	TermPerHour  string = "6YS6EN2CT7"
+)
+
+type Pricing struct {
+	Product     Product
+	ServiceCode string
+	Terms       Terms
+}
+
+type Terms struct {
+	OnDemand map[string]SKU
+	Reserved map[string]SKU
+}
+type Product struct {
+	ProductFamily string
+	Attributes    map[string]string
+	Sku           string
+}
+
+type SKU struct {
+	PriceDimensions map[string]Details
+	Sku             string
+	EffectiveDate   string
+	OfferTermCode   string
+	TermAttributes  string
+}
+
+type Details struct {
+	Unit         string
+	EndRange     string
+	Description  string
+	AppliesTo    []string
+	RateCode     string
+	BeginRange   string
+	PricePerUnit map[string]string
+}
+
+func newAWSConfig(ctx context.Context) (aws.Config, error) {
+	region := os.Getenv("AWS_REGION")
+	if region == "" {
+		return aws.Config{}, fmt.Errorf("Please configure the AWS_REGION environment variable")
+	}
+
+	cfg, err := config.LoadDefaultConfig(ctx)
+	if err != nil {
+		return aws.Config{}, err
+	}
+
+	return cfg, nil
+}
diff --git a/exporter/health.go b/exporter/health.go
new file mode 100644
index 0000000..a67f03b
--- /dev/null
+++ b/exporter/health.go
@@ -0,0 +1,102 @@
+package exporter
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/aws/aws-sdk-go-v2/service/health"
+	healthTypes "github.com/aws/aws-sdk-go-v2/service/health/types"
+	"github.com/slack-go/slack"
+)
+
+func (m *Metrics) HealthOrganizationEnabled(ctx context.Context) bool {
+	enabled, err := m.health.DescribeHealthServiceStatusForOrganization(ctx, &health.DescribeHealthServiceStatusForOrganizationInput{})
+
+	if err == nil && *enabled.HealthServiceAccessStatusForOrganization == "ENABLED" {
+		return true
+	}
+
+	return false
+}
+
+func (m Metrics) SendSlackNotification(events []HealthEvent) {
+	tz, err := time.LoadLocation(os.Getenv("TZ"))
+	if err != nil {
+		panic(err.Error())
+	}
+
+	for _, e := range events {
+
+		resources := m.extractResources(e.AffectedResources)
+		accounts := m.extractAccounts(e.AffectedAccounts)
+
+		service := *e.Event.Service
+		region := *e.Event.Region
+		status := e.Event.StatusCode
+
+		var text, color string
+		attachmentFields := []slack.AttachmentField{
+			{Title: "Account(s)", Value: accounts, Short: true},
+			{Title: "Resource(s)", Value: resources, Short: true},
+			{Title: "Service", Value: service, Short: true},
+			{Title: "Region", Value: region, Short: true},
+			{Title: "Start Time", Value: e.Event.StartTime.In(tz).String(), Short: true},
+			{Title: "Status", Value: string(status), Short: true},
+			{Title: "Event ARN", Value: fmt.Sprintf("`%s`", *e.Event.Arn), Short: false},
+			{Title: "Updates", Value: *e.EventDescription.LatestDescription, Short: false},
+		}
+
+		if status == healthTypes.EventStatusCodeClosed {
+			text = fmt.Sprintf(":heavy_check_mark:*[RESOLVED] The AWS Health issue with the %s service in the %s region is now resolved.*", service, region)
+			color = "18be52"
+			attachmentFields = append(attachmentFields[:6], attachmentFields[5:]...)
+			attachmentFields[5] = slack.AttachmentField{Title: "End Time", Value: e.Event.EndTime.In(tz).String(), Short: true}
+		} else {
+			text = fmt.Sprintf(":rotating_light:*[NEW] AWS Health reported an issue with the %s service in the %s region.*", service, region)
+			color = "danger"
+		}
+
+		attachment := slack.Attachment{
+			Color:  color,
+			Fields: attachmentFields,
+		}
+
+		_, _, err := m.slackApi.PostMessage(
+			m.slackChannel,
+			slack.MsgOptionText(text, false),
+			slack.MsgOptionAttachments(attachment),
+		)
+		if err != nil {
+			panic(err.Error())
+		}
+	}
+}
+
+func (m Metrics) extractResources(resources []healthTypes.AffectedEntity) string {
+	if len(resources) > 0 {
+		var tmp []string
+		for _, r := range resources {
+			tmp = append(tmp, *r.EntityValue)
+		}
+
+		resource := fmt.Sprintf("`%s`", strings.Join(tmp, ","))
+		if resource == "UNKNOWN" {
+			return "All resources in region"
+		}
+
+		return resource
+	}
+
+	return "All resources in region"
+}
+
+func (m Metrics) extractAccounts(accounts []string) string {
+	if len(accounts) > 0 {
+		return strings.Join(accounts, ",")
+	} else {
+		return "All accounts in region"
+	}
+}
diff --git a/exporter/metrics.go b/exporter/metrics.go
new file mode 100644
index 0000000..f72f5bc
--- /dev/null
+++ b/exporter/metrics.go
@@ -0,0 +1,81 @@
+package exporter
+
+import (
+	"context"
+	"strings"
+	"time"
+
+	"github.com/aws/aws-sdk-go-v2/aws"
+	"github.com/aws/aws-sdk-go-v2/credentials/stscreds"
+	"github.com/aws/aws-sdk-go-v2/service/health"
+	"github.com/aws/aws-sdk-go-v2/service/sts"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/collectors"
+	"github.com/slack-go/slack"
+	"github.com/urfave/cli/v2"
+)
+
+const (
+	namespace = "aws_health"
+)
+
+func NewMetrics(ctx context.Context, registry *prometheus.Registry, c *cli.Context) (*Metrics, error) {
+	m := Metrics{}
+
+	m.init(ctx, c)
+
+	registry.MustRegister(&m)
+	registry.MustRegister(collectors.NewProcessCollector(collectors.ProcessCollectorOpts{}))
+	registry.MustRegister(collectors.NewGoCollector())
+
+	return &m, nil
+}
+
+func (m *Metrics) init(ctx context.Context, c *cli.Context) {
+	cfg, err := newAWSConfig(ctx)
+	if err != nil {
+		panic(err.Error())
+	}
+
+	cfg.Region = "us-east-1"
+
+	if len(c.String("assume-role")) > 0 {
+		stsclient := sts.NewFromConfig(cfg)
+		creds := stscreds.NewAssumeRoleProvider(stsclient, c.String("assume-role"))
+		cfg.Credentials = aws.NewCredentialsCache(creds)
+	}
+
+	m.health = health.NewFromConfig(cfg)
+	m.awsconfig = cfg
+
+	m.lastScrape = time.Now().AddDate(0, 0, -7)
+
+	m.slackToken = c.String("slack-token")
+	m.slackChannel = c.String("slack-channel")
+	m.slackApi = slack.New(m.slackToken)
+
+	m.organizationEnabled = m.HealthOrganizationEnabled(ctx)
+}
+
+func (m *Metrics) Describe(ch chan<- *prometheus.Desc) {
+	prometheus.DescribeByCollect(m, ch)
+}
+
+func (m *Metrics) Collect(ch chan<- prometheus.Metric) {
+	var events []HealthEvent
+	if m.organizationEnabled {
+		events = m.GetOrgEvents()
+	} else {
+		events = m.GetEvents()
+	}
+
+	if len(events) == 0 {
+		return
+	}
+
+	m.SendSlackNotification(events)
+}
+
+func sanitizeLabel(label string) string {
+	return strings.Replace(strings.Replace(label, ".", "_", -1), "/", "_", -1)
+}
diff --git a/exporter/org.go b/exporter/org.go
new file mode 100644
index 0000000..fbbb8ea
--- /dev/null
+++ b/exporter/org.go
@@ -0,0 +1,115 @@
+package exporter
+
+import (
+	"context"
+	"time"
+
+	"github.com/aws/aws-sdk-go-v2/service/health"
+	healthTypes "github.com/aws/aws-sdk-go-v2/service/health/types"
+)
+
+func (m *Metrics) GetOrgEvents() []HealthEvent {
+	ctx := context.TODO()
+	now := time.Now()
+	pag := health.NewDescribeEventsForOrganizationPaginator(
+		m.health,
+		&health.DescribeEventsForOrganizationInput{
+			Filter: &healthTypes.OrganizationEventFilter{
+				EndTime: &healthTypes.DateTimeRange{
+					From: &m.lastScrape,
+					To:   &now,
+				},
+			},
+		})
+
+	updatedEvents := make([]HealthEvent, 0)
+
+	for pag.HasMorePages() {
+		events, err := pag.NextPage(ctx)
+		if err != nil {
+			panic(err.Error())
+		}
+
+		for _, event := range events.Events {
+			enrichedOrgEvent := m.EnrichOrgEvents(ctx, event)
+			updatedEvents = append(updatedEvents, enrichedOrgEvent)
+		}
+	}
+
+	m.lastScrape = now
+
+	return updatedEvents
+}
+
+func (m *Metrics) EnrichOrgEvents(ctx context.Context, event healthTypes.OrganizationEvent) HealthEvent {
+
+	enrichedEvent := HealthEvent{Arn: event.Arn}
+
+	m.getAffectedAccountsForOrg(ctx, event, &enrichedEvent)
+
+	m.getEventDetailsForOrg(ctx, event, &enrichedEvent)
+
+	m.getAffectedEntitiesForOrg(ctx, event, &enrichedEvent)
+
+	return enrichedEvent
+}
+
+func (m Metrics) getAffectedAccountsForOrg(ctx context.Context, event healthTypes.OrganizationEvent, enrichedEvent *HealthEvent) {
+	pag := health.NewDescribeAffectedAccountsForOrganizationPaginator(
+		m.health,
+		&health.DescribeAffectedAccountsForOrganizationInput{EventArn: event.Arn})
+
+	for pag.HasMorePages() {
+		accounts, err := pag.NextPage(ctx)
+		if err != nil {
+			panic(err.Error())
+		}
+
+		enrichedEvent.EventScope = accounts.EventScopeCode
+		enrichedEvent.AffectedAccounts = append(enrichedEvent.AffectedAccounts, accounts.AffectedAccounts...)
+	}
+}
+
+func (m Metrics) getEventDetailsForOrg(ctx context.Context, event healthTypes.OrganizationEvent, enrichedEvent *HealthEvent) {
+	var accountId *string
+	if enrichedEvent.EventScope == healthTypes.EventScopeCodeAccountSpecific {
+		accountId = &enrichedEvent.AffectedAccounts[0]
+	}
+
+	details, err := m.health.DescribeEventDetailsForOrganization(ctx, &health.DescribeEventDetailsForOrganizationInput{
+		OrganizationEventDetailFilters: []healthTypes.EventAccountFilter{{EventArn: event.Arn, AwsAccountId: accountId}},
+	})
+	if err != nil {
+		panic(err.Error())
+	}
+
+	enrichedEvent.Event = details.SuccessfulSet[0].Event
+	enrichedEvent.EventDescription = details.SuccessfulSet[0].EventDescription
+}
+
+func (m Metrics) getAffectedEntitiesForOrg(ctx context.Context, event healthTypes.OrganizationEvent, enrichedEvent *HealthEvent) {
+	var pagResources *health.DescribeAffectedEntitiesForOrganizationPaginator
+	if len(enrichedEvent.AffectedAccounts) > 0 {
+		accountFilter := make([]healthTypes.EventAccountFilter, len(enrichedEvent.AffectedAccounts))
+		for i, account := range enrichedEvent.AffectedAccounts {
+			accountFilter[i] = healthTypes.EventAccountFilter{EventArn: event.Arn, AwsAccountId: &account}
+		}
+
+		pagResources = health.NewDescribeAffectedEntitiesForOrganizationPaginator(
+			m.health,
+			&health.DescribeAffectedEntitiesForOrganizationInput{OrganizationEntityFilters: accountFilter})
+	} else {
+		pagResources = health.NewDescribeAffectedEntitiesForOrganizationPaginator(
+			m.health,
+			&health.DescribeAffectedEntitiesForOrganizationInput{OrganizationEntityFilters: []healthTypes.EventAccountFilter{{EventArn: event.Arn}}})
+	}
+
+	for pagResources.HasMorePages() {
+		resources, err := pagResources.NextPage(ctx)
+		if err != nil {
+			panic(err.Error())
+		}
+
+		enrichedEvent.AffectedResources = append(enrichedEvent.AffectedResources, resources.Entities...)
+	}
+}
diff --git a/exporter/single.go b/exporter/single.go
new file mode 100644
index 0000000..0679c16
--- /dev/null
+++ b/exporter/single.go
@@ -0,0 +1,82 @@
+package exporter
+
+import (
+	"context"
+	"time"
+
+	"github.com/aws/aws-sdk-go-v2/service/health"
+	healthTypes "github.com/aws/aws-sdk-go-v2/service/health/types"
+)
+
+func (m *Metrics) GetEvents() []HealthEvent {
+	ctx := context.TODO()
+	now := time.Now()
+	pag := health.NewDescribeEventsPaginator(
+		m.health,
+		&health.DescribeEventsInput{
+			Filter: &healthTypes.EventFilter{
+				EndTimes: []healthTypes.DateTimeRange{
+					{
+						From: &m.lastScrape,
+						To:   &now,
+					},
+				},
+			},
+		})
+
+	updatedEvents := make([]HealthEvent, 0)
+
+	for pag.HasMorePages() {
+		events, err := pag.NextPage(ctx)
+		if err != nil {
+			panic(err.Error())
+		}
+
+		for _, event := range events.Events {
+			enrichedEvent := m.EnrichEvents(ctx, event)
+			updatedEvents = append(updatedEvents, enrichedEvent)
+		}
+	}
+
+	m.lastScrape = now
+
+	return updatedEvents
+}
+
+func (m *Metrics) EnrichEvents(ctx context.Context, event healthTypes.Event) HealthEvent {
+
+	enrichedEvent := HealthEvent{Arn: event.Arn}
+
+	m.getEventDetails(ctx, event, &enrichedEvent)
+
+	m.getAffectedEntities(ctx, event, &enrichedEvent)
+
+	return enrichedEvent
+}
+
+func (m Metrics) getEventDetails(ctx context.Context, event healthTypes.Event, enrichedEvent *HealthEvent) {
+	details, err := m.health.DescribeEventDetails(ctx, &health.DescribeEventDetailsInput{EventArns: []string{*event.Arn}})
+	if err != nil {
+		panic(err.Error())
+	}
+
+	enrichedEvent.Event = details.SuccessfulSet[0].Event
+	enrichedEvent.EventDescription = details.SuccessfulSet[0].EventDescription
+}
+
+func (m Metrics) getAffectedEntities(ctx context.Context, event healthTypes.Event, enrichedEvent *HealthEvent) {
+	pagResources := health.NewDescribeAffectedEntitiesPaginator(
+		m.health,
+		&health.DescribeAffectedEntitiesInput{Filter: &healthTypes.EntityFilter{EventArns: []string{*event.Arn}}})
+
+	for pagResources.HasMorePages() {
+		resources, err := pagResources.NextPage(ctx)
+		if err != nil {
+			panic(err.Error())
+		}
+
+		enrichedEvent.AffectedResources = append(enrichedEvent.AffectedResources, resources.Entities...)
+	}
+
+	enrichedEvent.EventScope = event.EventScopeCode
+}
diff --git a/exporter/types.go b/exporter/types.go
new file mode 100644
index 0000000..772d630
--- /dev/null
+++ b/exporter/types.go
@@ -0,0 +1,30 @@
+package exporter
+
+import (
+	"time"
+
+	"github.com/aws/aws-sdk-go-v2/aws"
+	"github.com/aws/aws-sdk-go-v2/service/health"
+	healthTypes "github.com/aws/aws-sdk-go-v2/service/health/types"
+	"github.com/slack-go/slack"
+)
+
+type Metrics struct {
+	health              *health.Client
+	organizationEnabled bool
+	awsconfig           aws.Config
+	lastScrape          time.Time
+
+	slackApi     *slack.Client
+	slackToken   string
+	slackChannel string
+}
+
+type HealthEvent struct {
+	Arn               *string
+	AffectedAccounts  []string
+	EventScope        healthTypes.EventScopeCode
+	Event             *healthTypes.Event
+	EventDescription  *healthTypes.EventDescription
+	AffectedResources []healthTypes.AffectedEntity
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..6c38f59
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,67 @@
+module github.com/AndreZiviani/aws-health-exporter
+
+go 1.19
+
+require (
+	github.com/aws/aws-sdk-go-v2 v1.17.7
+	github.com/aws/aws-sdk-go-v2/config v1.18.7
+	github.com/aws/aws-sdk-go-v2/service/ec2 v1.77.0
+	github.com/aws/aws-sdk-go-v2/service/health v1.16.6
+	github.com/aws/aws-sdk-go-v2/service/pricing v1.17.5
+	github.com/prometheus/client_golang v1.14.0
+	github.com/sirupsen/logrus v1.9.0
+	github.com/slack-go/slack v0.12.1
+	github.com/urfave/cli/v2 v2.25.1
+	k8s.io/api v0.26.0
+	k8s.io/apimachinery v0.26.0
+	k8s.io/client-go v0.26.0
+)
+
+require (
+	github.com/aws/aws-sdk-go-v2/credentials v1.13.7 // indirect
+	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.12.21 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.31 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.4.25 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/ini v1.3.28 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.9.21 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sso v1.11.28 // indirect
+	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.13.11 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sts v1.17.7 // indirect
+	github.com/aws/smithy-go v1.13.5 // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/go-logr/logr v1.2.3 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/google/go-cmp v0.5.9 // indirect
+	github.com/google/gofuzz v1.1.0 // indirect
+	github.com/gorilla/websocket v1.4.2 // indirect
+	github.com/jmespath/go-jmespath v0.4.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/kr/pretty v0.2.0 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/prometheus/client_model v0.3.0 // indirect
+	github.com/prometheus/common v0.39.0 // indirect
+	github.com/prometheus/procfs v0.9.0 // indirect
+	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
+	golang.org/x/net v0.4.0 // indirect
+	golang.org/x/oauth2 v0.3.0 // indirect
+	golang.org/x/sys v0.3.0 // indirect
+	golang.org/x/term v0.3.0 // indirect
+	golang.org/x/text v0.5.0 // indirect
+	golang.org/x/time v0.3.0 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
+	gopkg.in/inf.v0 v0.9.1 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	k8s.io/klog/v2 v2.80.1 // indirect
+	k8s.io/utils v0.0.0-20221128185143-99ec85e7a448 // indirect
+	sigs.k8s.io/json v0.0.0-20220713155537-f223a00ba0e2 // indirect
+	sigs.k8s.io/structured-merge-diff/v4 v4.2.3 // indirect
+	sigs.k8s.io/yaml v1.3.0 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..94c2ffd
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,195 @@
+github.com/aws/aws-sdk-go-v2 v1.17.3/go.mod h1:uzbQtefpm44goOPmdKyAlXSNcwlRgF3ePWVW6EtJvvw=
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+github.com/aws/aws-sdk-go-v2 v1.17.7/go.mod h1:uzbQtefpm44goOPmdKyAlXSNcwlRgF3ePWVW6EtJvvw=
+github.com/aws/aws-sdk-go-v2/config v1.18.7 h1:V94lTcix6jouwmAsgQMAEBozVAGJMFhVj+6/++xfe3E=
+github.com/aws/aws-sdk-go-v2/config v1.18.7/go.mod h1:OZYsyHFL5PB9UpyS78NElgKs11qI/B5KJau2XOJDXHA=
+github.com/aws/aws-sdk-go-v2/credentials v1.13.7 h1:qUUcNS5Z1092XBFT66IJM7mYkMwgZ8fcC8YDIbEwXck=
+github.com/aws/aws-sdk-go-v2/credentials v1.13.7/go.mod h1:AdCcbZXHQCjJh6NaH3pFaw8LUeBFn5+88BZGMVGuBT8=
+github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.12.21 h1:j9wi1kQ8b+e0FBVHxCqCGo4kxDU175hoDHcWAi0sauU=
+github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.12.21/go.mod h1:ugwW57Z5Z48bpvUyZuaPy4Kv+vEfJWnIrky7RmkBvJg=
+github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.27/go.mod h1:a1/UpzeyBBerajpnP5nGZa9mGzsBn5cOKxm6NWQsvoI=
+github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.31 h1:sJLYcS+eZn5EeNINGHSCRAwUJMFVqklwkH36Vbyai7M=
+github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.31/go.mod h1:QT0BqUvX1Bh2ABdTGnjqEjvjzrCfIniM9Sc8zn9Yndo=
+github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.4.21/go.mod h1:+Gxn8jYn5k9ebfHEqlhrMirFjSW0v0C9fI+KN5vk2kE=
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diff --git a/main.go b/main.go
new file mode 100644
index 0000000..3acdc2b
--- /dev/null
+++ b/main.go
@@ -0,0 +1,77 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"os"
+
+	"github.com/AndreZiviani/aws-health-exporter/exporter"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+	log "github.com/sirupsen/logrus"
+	"github.com/urfave/cli/v2"
+)
+
+func main() {
+	flags := []cli.Flag{
+		&cli.StringFlag{Name: "listen-address", Aliases: []string{"l"}, Usage: "The address to listen on for HTTP requests.", Value: ":8080"},
+		&cli.StringFlag{Name: "metrics-path", Aliases: []string{"m"}, Usage: "Metrics endpoint path", Value: "/metrics"},
+		&cli.StringFlag{Name: "regions", Aliases: []string{"r"}, Usage: "Comma separated list of AWS regions to monitor", Value: "all-regions"},
+		&cli.StringFlag{Name: "log-level", Aliases: []string{"v"}, Usage: "Log level", Value: "info"},
+		&cli.StringFlag{Name: "slack-token", Usage: "Slack token", EnvVars: []string{"SLACK_TOKEN"}, Required: true},
+		&cli.StringFlag{Name: "slack-channel", Usage: "Slack channel id", EnvVars: []string{"SLACK_CHANNEL"}, Required: true},
+		&cli.StringFlag{Name: "assume-role", Usage: "Assume another AWS IAM role", EnvVars: []string{"ASSUME_ROLE"}},
+	}
+
+	app := &cli.App{
+		Flags: flags,
+		Name:  "aws-health-exporter",
+		Action: func(c *cli.Context) error {
+			parsedLevel, err := log.ParseLevel(c.String("log-level"))
+			if err != nil {
+				log.WithError(err).Warnf("Couldn't parse log level, using default: %s", log.GetLevel())
+			} else {
+				log.SetLevel(parsedLevel)
+				log.Debugf("Set log level to %s", parsedLevel)
+			}
+
+			log.Infof("Starting AWS Health Exporter. [log-level=%s]", c.String("log-level"))
+
+			ctx := context.TODO()
+
+			registry := prometheus.NewRegistry()
+
+			_, err = exporter.NewMetrics(ctx, registry, c)
+			if err != nil {
+				log.Fatal(err)
+			}
+
+			log.Infof("Starting metric http endpoint [address=%s, path=%s, regions=%s]", c.String("listen-address"), c.String("metrics-path"), c.String("regions"))
+			http.Handle(c.String("metrics-path"), promhttp.HandlerFor(registry, promhttp.HandlerOpts{}))
+			http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+				w.WriteHeader(http.StatusOK)
+				w.Write([]byte(`<html>
+					<head><title>AWS Health Exporter</title></head>
+					<body>
+					<h1>AWS Health Exporter</h1>
+					<p><a href="` + c.String("metrics-path") + `">Metrics</a></p>
+					</body>
+					</html>
+				`))
+
+			})
+			log.Fatal(http.ListenAndServe(c.String("listen-address"), nil))
+
+			return nil
+		},
+	}
+
+	err := app.Run(os.Args)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+
+	return
+}