Add contests about elastic search helm chart

contents/Elasticsearch_Exporter/nc/v4.0.1/helm-chart/Chart.yaml

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+apiVersion: v1
+appVersion: 1.1.0
+description: Elasticsearch stats exporter for Prometheus
+home: https://github.com/justwatchcom/elasticsearch_exporter
+keywords:
+- metrics
+- elasticsearch
+- monitoring
+kubeVersion: '>=1.10.0-0'
+maintainers:
+- email: [email protected]
+  name: svenmueller
+- email: [email protected]
+  name: caarlos0
+- email: [email protected]
+  name: desaintmartin
+name: prometheus-elasticsearch-exporter
+sources:
+- https://github.com/prometheus-community/helm-charts/tree/main/charts/prometheus-elasticsearch-exporter
+version: 4.0.1

contents/Elasticsearch_Exporter/nc/v4.0.1/helm-chart/README.md

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+# Elasticsearch Exporter
+
+Prometheus exporter for various metrics about ElasticSearch, written in Go.
+
+Learn more: <https://github.com/justwatchcom/elasticsearch_exporter>
+
+This chart creates an Elasticsearch-Exporter deployment on a [Kubernetes](http://kubernetes.io)
+cluster using the [Helm](https://helm.sh) package manager.
+
+## Prerequisites
+
+- Kubernetes 1.10+
+
+## Get Repo Info
+
+```console
+helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
+helm repo update
+```
+
+_See [helm repo](https://helm.sh/docs/helm/helm_repo/) for command documentation._
+
+## Install Chart
+
+```console
+# Helm 3
+$ helm install [RELEASE_NAME] prometheus-community/prometheus-elasticsearch-exporter
+
+# Helm 2
+$ helm install --name [RELEASE_NAME] prometheus-community/prometheus-elasticsearch-exporter
+```
+
+The command deploys Elasticsearch Exporter on the Kubernetes cluster using the default configuration.
+
+_See [configuration](#configuration) below._
+
+_See [helm install](https://helm.sh/docs/helm/helm_install/) for command documentation._
+
+## Uninstall Chart
+
+```console
+# Helm 3
+$ helm uninstall [RELEASE_NAME]
+
+# Helm 2
+# helm delete --purge [RELEASE_NAME]
+```
+
+This removes all the Kubernetes components associated with the chart and deletes the release.
+
+_See [helm uninstall](https://helm.sh/docs/helm/helm_uninstall/) for command documentation._
+
+## Upgrading Chart
+
+```console
+# Helm 3 or 2
+$ helm upgrade [RELEASE_NAME] [CHART] --install
+```
+
+_See [helm upgrade](https://helm.sh/docs/helm/helm_upgrade/) for command documentation._
+
+### To 4.0.0
+
+While migrating the chart from `stable/elasticsearch-exporter` it was renamed to `prometheus-elasticsearch-exporter`.
+If you want to upgrade from a previous version and you need to keep the old resource names (`Service`, `Deployment`, etc) you can set `fullnameOverride` and `nameOverride` to do so.
+
+The example below shows how those values should be set for a `my-exporter` release of the previous chart.
+
+```console
+helm install my-exporter stable/elasticsearch-exporter
+helm upgrade my-exporter . --set fullnameOverride=my-exporter-elasticsearch-exporter --set nameOverride=elasticsearch-exporter
+```
+
+### To 3.0.0
+
+`prometheusRule.rules` are now processed as Helm template, allowing to set variables in them.
+This means that if a rule contains a {{ $value }}, Helm will try replacing it and probably fail.
+
+You now need to escape the rules (see `values.yaml`) for examples.
+
+### To 2.0.0
+
+Some Kubernetes apis used from 1.x have been deprecated. You need to update your cluster to Kubernetes 1.10+ to support new definitions used in 2.x.
+
+## Configuration
+
+See [Customizing the Chart Before Installing](https://helm.sh/docs/intro/using_helm/#customizing-the-chart-before-installing).
+To see all configurable options with detailed comments, visit the chart's [values.yaml](./values.yaml), or run these configuration commands:
+
+```console
+# Helm 2
+$ helm inspect values prometheus-community/prometheus-elasticsearch-exporter
+
+# Helm 3
+$ helm show values prometheus-community/prometheus-elasticsearch-exporter
+```
+
+> **Tip**: You can use the default [values.yaml](values.yaml)

contents/Elasticsearch_Exporter/nc/v4.0.1/helm-chart/ci/default-values.yaml

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+# Leave this file empty to ensure that CI runs builds against the default configuration in values.yaml.

contents/Elasticsearch_Exporter/nc/v4.0.1/helm-chart/ci/security-context.yaml

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+---
+# Set default security context for kubernetes
+
+securityContext:
+  disable: true

contents/Elasticsearch_Exporter/nc/v4.0.1/helm-chart/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=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ template "elasticsearch-exporter.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT{{ .Values.web.path }}
+{{- 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 "elasticsearch-exporter.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ template "elasticsearch-exporter.fullname" . }} -o jsonpath='{.status.loadBalancer.ingress[0].ip}')
+  echo http://$SERVICE_IP:{{ .Values.service.httpPort }}{{ .Values.web.path }}
+{{- else if contains "ClusterIP"  .Values.service.type }}
+  export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app={{ template "elasticsearch-exporter.fullname" . }}" -o jsonpath="{.items[0].metadata.name}")
+  echo "Visit http://127.0.0.1:{{ .Values.service.httpPort }}{{ .Values.web.path }} to use your application"
+  kubectl port-forward $POD_NAME {{ .Values.service.httpPort }}:{{ .Values.service.httpPort }} --namespace {{ .Release.Namespace }}
+{{- end }}

contents/Elasticsearch_Exporter/nc/v4.0.1/helm-chart/templates/_helpers.tpl

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+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "elasticsearch-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 "elasticsearch-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 "elasticsearch-exporter.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+

contents/Elasticsearch_Exporter/nc/v4.0.1/helm-chart/templates/cert-secret.yaml

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+{{- if and .Values.es.ssl.enabled (eq .Values.es.ssl.useExistingSecrets false) }}
+apiVersion: v1
+kind: Secret
+metadata:
+  name: {{ template "elasticsearch-exporter.fullname" . }}-cert
+  labels:
+    chart: {{ template "elasticsearch-exporter.chart" . }}
+    app: {{ template "elasticsearch-exporter.name" . }}
+    release: "{{ .Release.Name }}"
+    heritage: "{{ .Release.Service }}"
+type: Opaque
+data:
+  ca.pem: {{ .Values.es.ssl.ca.pem | b64enc }}
+  client.pem: {{ .Values.es.ssl.client.pem | b64enc }}
+  client.key: {{ .Values.es.ssl.client.key | b64enc }}
+{{- end }}

contents/Elasticsearch_Exporter/nc/v4.0.1/helm-chart/templates/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ template "elasticsearch-exporter.fullname" . }}
+  labels:
+    chart: {{ template "elasticsearch-exporter.chart" . }}
+    app: {{ template "elasticsearch-exporter.name" . }}
+    release: "{{ .Release.Name }}"
+    heritage: "{{ .Release.Service }}"
+spec:
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      app: {{ template "elasticsearch-exporter.name" . }}
+      release: "{{ .Release.Name }}"
+  strategy:
+    rollingUpdate:
+      maxSurge: 1
+      maxUnavailable: 0
+    type: RollingUpdate
+  template:
+    metadata:
+      labels:
+        app: {{ template "elasticsearch-exporter.name" . }}
+        release: "{{ .Release.Name }}"
+      {{- if .Values.podAnnotations }}
+      annotations:
+{{ toYaml .Values.podAnnotations | indent 8 }}
+      {{- end }}
+    spec:
+      {{- if .Values.serviceAccount.create  }}
+      serviceAccountName: {{ template "elasticsearch-exporter.fullname" . }}
+      {{- else }}
+      serviceAccountName: {{ .Values.serviceAccount.name }}
+      {{- end }}
+{{- if .Values.priorityClassName }}
+      priorityClassName: "{{ .Values.priorityClassName }}"
+{{- end }}
+{{- if .Values.image.pullSecret }}
+      imagePullSecrets:
+        - name: {{ .Values.image.pullSecret }}
+{{- end }}
+      restartPolicy: {{ .Values.restartPolicy }}
+      {{- if .Values.securityContext.enabled }}
+      securityContext:
+        runAsNonRoot: true
+        runAsUser: {{ .Values.securityContext.runAsUser }}
+      {{- end }}
+      containers:
+        - name: exporter
+          env:
+            {{- range $key, $value := .Values.env }}
+            - name: {{ $key }}
+              value: "{{ $value }}"
+            {{- end }}
+            {{- range $key, $value := .Values.extraEnvSecrets }}
+            - name: {{ $key }}
+              valueFrom:
+                secretKeyRef:
+                  name: {{ required "Must specify secret!" $value.secret }}
+                  key: {{ required "Must specify key!" $value.key }}
+            {{- end }}
+          {{- if .Values.envFromSecret }}
+          envFrom:
+          - secretRef:
+              name: {{ .Values.envFromSecret }}
+          {{- end }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          command: ["elasticsearch_exporter",
+                    {{- with .Values.log.format }}
+                    "--log.format={{ . }}",
+                    {{- end }}
+                    {{- with .Values.log.level }}
+                    "--log.level={{ . }}",
+                    {{- end }}
+                    {{- if .Values.es.uri }}
+                    "--es.uri={{ .Values.es.uri }}",
+                    {{- end }}
+                    {{- if .Values.es.all }}
+                    "--es.all",
+                    {{- end }}
+                    {{- if .Values.es.indices }}
+                    "--es.indices",
+                    {{- end }}
+                    {{- if .Values.es.indices_settings }}
+                    "--es.indices_settings",
+                    {{- end }}
+                    {{- if .Values.es.shards }}
+                    "--es.shards",
+                    {{- end }}
+                    {{- if .Values.es.snapshots }}
+                    "--es.snapshots",
+                    {{- end }}
+                    {{- if .Values.es.cluster_settings }}
+                    "--es.cluster_settings",
+                    {{- end }}
+                    "--es.timeout={{ .Values.es.timeout }}",
+                    {{- if .Values.es.sslSkipVerify }}
+                    "--es.ssl-skip-verify",
+                    {{- end }}
+                    {{- if .Values.es.ssl.enabled }}
+                    "--es.ca={{.Values.es.ssl.ca.path }}",
+                    {{- if .Values.es.ssl.client.enabled }}
+                    "--es.client-cert={{ .Values.es.ssl.client.pemPath }}",
+                    "--es.client-private-key={{ .Values.es.ssl.client.keyPath }}",
+                    {{- end }}
+                    {{- end }}
+                    "--web.listen-address=:{{ .Values.service.httpPort }}",
+                    "--web.telemetry-path={{ .Values.web.path }}"]
+          securityContext:
+            capabilities:
+              drop:
+                - SETPCAP
+                - MKNOD
+                - AUDIT_WRITE
+                - CHOWN
+                - NET_RAW
+                - DAC_OVERRIDE
+                - FOWNER
+                - FSETID
+                - KILL
+                - SETGID
+                - SETUID
+                - NET_BIND_SERVICE
+                - SYS_CHROOT
+                - SETFCAP
+            readOnlyRootFilesystem: true
+          resources:
+{{ toYaml .Values.resources | indent 12 }}
+          ports:
+            - containerPort: {{ .Values.service.httpPort }}
+              name: http
+          livenessProbe:
+            httpGet:
+              path: /healthz
+              port: http
+            initialDelaySeconds: 5
+            timeoutSeconds: 5
+            periodSeconds: 5
+          readinessProbe:
+            httpGet:
+              path: /healthz
+              port: http
+            initialDelaySeconds: 1
+            timeoutSeconds: 5
+            periodSeconds: 5
+          lifecycle:
+            preStop:
+              exec:
+                command: ["/bin/bash", "-c", "sleep 20"]
+          volumeMounts:
+            {{- if and .Values.es.ssl.enabled (eq .Values.es.ssl.useExistingSecrets false) }}
+            - mountPath: /ssl
+              name: ssl
+            {{- end }}
+            {{- range .Values.secretMounts }}
+            - name: {{ .name }}
+              mountPath: {{ .path }}
+              {{- if .subPath }}
+              subPath: {{ .subPath }}
+              {{- end }}
+            {{- end }}
+{{- if .Values.nodeSelector }}
+      nodeSelector:
+{{ toYaml .Values.nodeSelector | indent 8 }}
+{{- end }}
+{{- if .Values.tolerations }}
+      tolerations:
+{{ toYaml .Values.tolerations | indent 8 }}
+{{- end }}
+{{- if .Values.affinity }}
+      affinity:
+{{ toYaml .Values.affinity | indent 8 }}
+{{- end }}
+      volumes:
+        {{- if and .Values.es.ssl.enabled (eq .Values.es.ssl.useExistingSecrets false) }}
+        - name: ssl
+          secret:
+            secretName: {{ template "elasticsearch-exporter.fullname" . }}-cert
+        {{- end }}
+        {{- range .Values.secretMounts }}
+        - name: {{ .name }}
+          secret:
+            secretName: {{ .secretName }}
+        {{- end }}