Add cloudwatch exporter (#4022)

* Add cloudwatch-exporter chart

* Add readme

* Review readme

* fix lint errors

* Review chart

* Review chart

* move to stable and rename chart to prometheus-cloudwatch-exporter

* Addedd myself as a owner

* fix ci

* review table format

stable/prometheus-cloudwatch-exporter/.helmignore

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+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj

stable/prometheus-cloudwatch-exporter/Chart.yaml

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+apiVersion: v1
+appVersion: "0.1.0"
+description: A Helm chart for prometheus cloudwatch-exporter
+name: prometheus-cloudwatch-exporter
+version: 0.1.0
+sources:
+- https://github.com/prometheus/cloudwatch_exporter
+keywords:
+- aws
+- cloudwatch
+- prometheus
+- exporter
+maintainers:
+- email: gianrubio@gmail.com
+  name: gianrubio

stable/prometheus-cloudwatch-exporter/OWNERS

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+approvers:
+- gianrubio
+reviewers:
+- gianrubio

stable/prometheus-cloudwatch-exporter/README.md

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+# Cloudwatch exporter
+
+* Installs [cloudwatch exporter](http://github.com/prometheus/cloudwatch_exporter)
+
+## TL;DR;
+
+```console
+$ helm install stable/prometheus-cloudwatch-exporter
+```
+
+## Introduction
+
+This chart bootstraps a [cloudwatch exporter](http://github.com/prometheus/cloudwatch_exporter) deployment on a [Kubernetes](http://kubernetes.io) cluster using the [Helm](https://helm.sh) package manager.
+
+## Prerequisites
+
+- [kube2iam](../../stable/kube2iam) installed to used the **aws.role** config option otherwise configure **aws.aws_access_key_id** and **aws.aws_secret_access_key**
+
+## Installing the Chart
+
+To install the chart with the release name `my-release`:
+
+```console
+$ # edit aws.aws_access_key_id and aws.aws_access_key_id with the key/password of a AWS user with a policy to access  Cloudwatch
+$ helm install --name my-release stable/prometheus-cloudwatch-exporter
+$ # or add a role to aws with the [correct policy](https://github.com/prometheus/cloudwatch_exporter#credentials-and-permissions) to add to cloud watch
+$ helm install --name my-release stable/prometheus-cloudwatch-exporter --set awsRole=roll_name_here
+```
+
+The command deploys Cloudwatch exporter on the Kubernetes cluster in the default configuration. The [configuration](#configuration) section lists the parameters that can be configured during installation.
+
+## Uninstalling the Chart
+
+To uninstall/delete the `my-release` deployment:
+
+```console
+$ helm delete my-release
+```
+
+The command removes all the Kubernetes components associated with the chart and deletes the release.
+
+## Configuration
+
+The following tables lists the configurable parameters of the Cloudwatch Exporter chart and their default values.
+
+|          Parameter          |                      Description                       |          Default           |
+| --------------------------- | ------------------------------------------------------ | -------------------------- |
+| `image`                     | Image                                                  | `prom/cloudwatch-exporter` |
+| `imageTag`                  | Image tag                                              | `latest`                   |
+| `imagePullPolicy`           | Image pull policy                                      | `IfNotPresent`             |
+| `service.type`              | Service type                                           | `ClusterIP`                |
+| `service.port`              | The service port                                       | `80`                       |
+| `service.targetPort`        | The target port of the container                       | `9100`                     |
+| `resources`                 |                                                        | `{}`                       |
+| `aws.region`                | AWS Cloudwatch region                                  | `eu-west-1`                |
+| `aws.role`                  | AWS IAM Role To Use                                    |                            |
+| `aws.aws_access_key_id`     | AWS access key id                                      |                            |
+| `aws.aws_secret_access_key` | AWS secret access key                                  |                            |
+| `config`                    | Cloudwatch exporter configuration                      | `example configuration`    |
+| `rbac.create`               | If true, create & use RBAC resources                   | `false`                    |
+| `serviceAccount.create`     | Specifies whether a service account should be created. | `true`                     |
+| `serviceAccount.name`       | Name of the service account.                           |                            |
+| `tolerations`               | Add tolerations                                        | `[]`                       |
+| `nodeSelector`              | node labels for pod assignment                         | `{}`                       |
+| `affinity`                  | node/pod affinities                                    | `{}`                       |
+
+
+Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`. For example,
+
+```console
+$ helm install --name my-release \
+  --set aws.region=us-east-1 --set aws.role=my-aws-role \
+    stable/prometheus-cloudwatch-exporter
+```
+
+Alternatively, a YAML file that specifies the values for the above parameters can be provided while installing the chart. For example,
+
+```console
+$ helm install --name my-release -f values.yaml stable/prometheus-cloudwatch-exporter
+```

stable/prometheus-cloudwatch-exporter/templates/NOTES.txt

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+1. Get the application URL by running these commands:
+{{- if contains "NodePort" .Values.service.type }}
+  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ template "prometheus-cloudwatch-exporter.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.service.type }}
+     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+           You can watch the status of by running 'kubectl get svc -w {{ template "prometheus-cloudwatch-exporter.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ template "prometheus-cloudwatch-exporter.fullname" . }} -o jsonpath='{.status.loadBalancer.ingress[0].ip}')
+  echo http://$SERVICE_IP:{{ .Values.service.port }}
+{{- else if contains "ClusterIP" .Values.service.type }}
+  export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app={{ template "prometheus-cloudwatch-exporter.name" . }},release={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
+  echo "Visit http://127.0.0.1:8080 to use your application"
+  kubectl port-forward $POD_NAME 8080:80
+{{- end }}

stable/prometheus-cloudwatch-exporter/templates/_helpers.tpl

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+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "prometheus-cloudwatch-exporter.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "prometheus-cloudwatch-exporter.fullname" -}}
+{{- if .Values.fullnameOverride -}}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" -}}
+{{- else -}}
+{{- $name := default .Chart.Name .Values.nameOverride -}}
+{{- if contains $name .Release.Name -}}
+{{- .Release.Name | trunc 63 | trimSuffix "-" -}}
+{{- else -}}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+{{- end -}}
+{{- end -}}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "prometheus-cloudwatch-exporter.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}

stable/prometheus-cloudwatch-exporter/templates/clusterrole.yaml

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+{{- if .Values.rbac.create }}
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRole
+metadata:
+  name: {{ template "prometheus-cloudwatch-exporter.fullname" . }}
+  labels:
+    app: {{ template "prometheus-cloudwatch-exporter.name" . }}
+    chart: {{ template "prometheus-cloudwatch-exporter.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+rules:
+  - apiGroups: [""]
+    resources: ["secrets","configmap"]
+    resourceNames: ["{{ template "prometheus-cloudwatch-exporter.fullname" . }}"]
+    verbs: ["get"]
+{{- end }}

stable/prometheus-cloudwatch-exporter/templates/clusterrolebinding.yaml

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+{{ if .Values.rbac.create }}
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRoleBinding
+metadata:
+  name: {{ template "prometheus-cloudwatch-exporter.fullname" . }}
+  labels:
+    app: {{ template "prometheus-cloudwatch-exporter.name" . }}
+    chart: {{ template "prometheus-cloudwatch-exporter.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+subjects:
+  - kind: ServiceAccount
+    name: {{ template "prometheus-cloudwatch-exporter.fullname" . }}
+    namespace: {{ .Release.Namespace }}
+roleRef:
+  kind: ClusterRole
+  name: {{ template "prometheus-cloudwatch-exporter.fullname" . }}
+  apiGroup: rbac.authorization.k8s.io
+{{ end }}

stable/prometheus-cloudwatch-exporter/templates/configmap.yaml

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+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ template "prometheus-cloudwatch-exporter.fullname" . }}
+  labels:
+    app: {{ template "prometheus-cloudwatch-exporter.name" . }}
+    chart: {{ template "prometheus-cloudwatch-exporter.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+data:
+  config.yaml: |
+{{ printf .Values.config | indent 4 }}

stable/prometheus-cloudwatch-exporter/templates/deployment.yaml

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+apiVersion: apps/v1beta2
+kind: Deployment
+metadata:
+  name: {{ template "prometheus-cloudwatch-exporter.fullname" . }}
+  labels:
+    app: {{ template "prometheus-cloudwatch-exporter.name" . }}
+    chart: {{ template "prometheus-cloudwatch-exporter.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+spec:
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      app: {{ template "prometheus-cloudwatch-exporter.name" . }}
+      release: {{ .Release.Name }}
+  template:
+    metadata:
+      labels:
+        app: {{ template "prometheus-cloudwatch-exporter.name" . }}
+        release: {{ .Release.Name }}
+      annotations:
+        {{ if .Values.aws.role}}iam.amazonaws.com/role: {{ .Values.aws.role }}{{ end }}
+    spec:
+      containers:
+        - name: {{ .Chart.Name }}
+          command:
+            - java
+            - -jar
+            - /cloudwatch_exporter.jar
+            - "{{ .Values.service.targetPort }}"
+            - /config/config.yaml
+        {{- if not .Values.aws.role }}
+        {{- if and .Values.aws.secretKey .Values.aws.accessKey }}
+          env:
+            - name: AWS_ACCESS_KEY_ID
+              valueFrom:
+                secretKeyRef:
+                  key: aws_access_key_id
+                  name: {{ template "prometheus-cloudwatch-exporter.fullname" . }}
+            - name: AWS_SECRET_ACCESS_KEY
+              valueFrom:
+                secretKeyRef:
+                  key: aws_secret_access_key
+                  name: {{ template "prometheus-cloudwatch-exporter.fullname" . }}
+          {{- end }}
+          {{- end }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          ports:
+            - name: http
+              containerPort: {{ .Values.service.targetPort }}
+              protocol: TCP
+          livenessProbe:
+            httpGet:
+              path: /
+              port: http
+          readinessProbe:
+            httpGet:
+              path: /
+              port: http
+          resources:
+{{ toYaml .Values.resources | indent 12 }}
+          volumeMounts:
+            - name: vol-prometheus-cloudwatch-exporter
+              mountPath: /config
+     {{- with .Values.nodeSelector }}
+      nodeSelector:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+    {{- with .Values.affinity }}
+      affinity:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+    {{- with .Values.tolerations }}
+      tolerations:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+      volumes:
+      - configMap:
+          defaultMode: 420
+          name: {{ template "prometheus-cloudwatch-exporter.fullname" . }}
+        name: vol-prometheus-cloudwatch-exporter

stable/prometheus-cloudwatch-exporter/templates/secrets.yaml

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+{{- if not .Values.aws.role }}
+apiVersion: v1
+kind: Secret
+metadata:
+  name: {{ template "prometheus-cloudwatch-exporter.fullname" . }}
+  labels:
+    app: {{ template "prometheus-cloudwatch-exporter.name" . }}
+    chart: {{ template "prometheus-cloudwatch-exporter.chart" . }}
+    heritage: {{ .Release.Service }}
+    release: {{ .Release.Name }}
+type: Opaque
+data:
+{{ (.Files.Glob "secrets/*").AsSecrets | indent 2 }}
+{{- end }}

stable/prometheus-cloudwatch-exporter/templates/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ template "prometheus-cloudwatch-exporter.fullname" . }}
+  labels:
+    app: {{ template "prometheus-cloudwatch-exporter.name" . }}
+    chart: {{ template "prometheus-cloudwatch-exporter.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+    - port: {{ .Values.service.port }}
+      targetPort: {{ .Values.service.targetPort }}
+      protocol: TCP
+      name: http
+  selector:
+    app: {{ template "prometheus-cloudwatch-exporter.name" . }}
+    release: {{ .Release.Name }}

stable/prometheus-cloudwatch-exporter/templates/serviceaccount.yaml

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+{{- if .Values.serviceAccount.create }}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ template "prometheus-cloudwatch-exporter.fullname" . }}
+  labels:
+    app: {{ template "prometheus-cloudwatch-exporter.name" . }}
+    chart: {{ template "prometheus-cloudwatch-exporter.chart" . }}    
+    release: "{{ .Release.Name }}"
+    heritage: "{{ .Release.Service }}"
+{{- end }}

stable/prometheus-cloudwatch-exporter/values.yaml

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+# Default values for prometheus-cloudwatch-exporter.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+
+replicaCount: 1
+
+image:
+  repository: prom/cloudwatch-exporter
+  tag: latest
+  pullPolicy: IfNotPresent
+
+service:
+  type: ClusterIP
+  port: 80
+  targetPort: 9100
+
+resources: {}
+  # We usually recommend not to specify default resources and to leave this as a conscious
+  # choice for the user. This also increases chances charts run on environments with little
+  # resources, such as Minikube. If you do want to specify resources, uncomment the following
+  # lines, adjust them as necessary, and remove the curly braces after 'resources:'.
+  # limits:
+  #   cpu: 100m
+  #    memory: 128Mi
+  # requests:
+  #   cpu: 100m
+  #   memory: 128Mi
+
+aws:
+  region: eu-west-1
+  role:
+  # Note: Do not specify the aws_access_key_id abd aws_secret_access_key if you specified role before
+  aws_access_key_id:
+  aws_secret_access_key:
+
+serviceAccount:
+  # Specifies whether a ServiceAccount should be created
+  create: true
+  # The name of the ServiceAccount to use.
+  # If not set and create is true, a name is generated using the fullname template
+  name:
+
+rbac:
+  # Specifies whether RBAC resources should be created
+  create: true
+
+config: |-
+  # This is the default configuration for prometheus-cloudwatch-exporter
+  region: eu-west-1
+  period_seconds: 240
+  metrics:
+  - aws_namespace: AWS/ELB
+    aws_metric_name: HealthyHostCount
+    aws_dimensions: [AvailabilityZone, LoadBalancerName]
+    aws_statistics: [Average]
+
+  - aws_namespace: AWS/ELB
+    aws_metric_name: UnHealthyHostCount
+    aws_dimensions: [AvailabilityZone, LoadBalancerName]
+    aws_statistics: [Average]
+
+  - aws_namespace: AWS/ELB
+    aws_metric_name: RequestCount
+    aws_dimensions: [AvailabilityZone, LoadBalancerName]
+    aws_statistics: [Sum]
+
+  - aws_namespace: AWS/ELB
+    aws_metric_name: Latency
+    aws_dimensions: [AvailabilityZone, LoadBalancerName]
+    aws_statistics: [Average]
+
+  - aws_namespace: AWS/ELB
+    aws_metric_name: SurgeQueueLength
+    aws_dimensions: [AvailabilityZone, LoadBalancerName]
+    aws_statistics: [Maximum, Sum]
+
+
+nodeSelector: {}
+
+tolerations: []
+
+affinity: {}