Add prometheus-pushgateway chart (#55)

Signed-off-by: Christian Berendt <[email protected]>

.charts.yml

@@ -1,5 +1,10 @@
 ---
 charts:
+  - name: prometheus-pushgateway
+    # https://artifacthub.io/packages/helm/prometheus-community/prometheus-pushgateway
+    version: 2.14.0
+    repository:
+      url: https://prometheus-community.github.io/helm-charts
   - name: keycloak
     # https://artifacthub.io/packages/helm/bitnami/keycloak
     version: 21.8.0

charts/prometheus-pushgateway/.helmignore

@@ -0,0 +1,24 @@
+# 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
+
+# OWNERS file for Kubernetes
+OWNERS

charts/prometheus-pushgateway/Chart.yaml

@@ -0,0 +1,24 @@
+annotations:
+  artifacthub.io/license: Apache-2.0
+  artifacthub.io/links: |
+    - name: Chart Source
+      url: https://github.com/prometheus-community/helm-charts
+apiVersion: v2
+appVersion: v1.9.0
+description: A Helm chart for prometheus pushgateway
+home: https://github.com/prometheus/pushgateway
+keywords:
+- pushgateway
+- prometheus
+maintainers:
+- email: [email protected]
+  name: gianrubio
+- email: [email protected]
+  name: cstaud
+- email: [email protected]
+  name: zeritti
+name: prometheus-pushgateway
+sources:
+- https://github.com/prometheus/pushgateway
+type: application
+version: 2.14.0

charts/prometheus-pushgateway/README.md

@@ -0,0 +1,88 @@
+# Prometheus Pushgateway
+
+This chart bootstraps a Prometheus [Pushgateway](http://github.com/prometheus/pushgateway) deployment on a [Kubernetes](http://kubernetes.io) cluster using the [Helm](https://helm.sh) package manager.
+
+An optional prometheus `ServiceMonitor` can be enabled, should you wish to use this gateway with [Prometheus Operator](https://github.com/coreos/prometheus-operator).
+
+## Get Repository Info
+<!-- textlint-disable terminology -->
+```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._
+<!-- textlint-enable -->
+## Install Chart
+
+```console
+helm install [RELEASE_NAME] prometheus-community/prometheus-pushgateway
+```
+
+_See [configuration](#configuration) below._
+
+_See [helm install](https://helm.sh/docs/helm/helm_install/) for command documentation._
+
+## Uninstall Chart
+
+```console
+helm uninstall [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 upgrade [RELEASE_NAME] prometheus-community/prometheus-pushgateway --install
+```
+
+_See [helm upgrade](https://helm.sh/docs/helm/helm_upgrade/) for command documentation._
+
+### To 2.0.0
+
+Chart API version has been upgraded to v2 so Helm 3 is needed from now on.
+
+Docker image tag is used from Chart.yaml appVersion field by default now.
+
+Version 2.0.0 also adapted [Helm label and annotation best practices](https://helm.sh/docs/chart_best_practices/labels/). Specifically, labels mapping is listed below:
+
+```console
+OLD                 => NEW
+----------------------------------------
+heritage            => app.kubernetes.io/managed-by
+chart               => helm.sh/chart
+[container version] => app.kubernetes.io/version
+app                 => app.kubernetes.io/name
+release             => app.kubernetes.io/instance
+```
+
+Therefore, depending on the way you've configured the chart, the previous StatefulSet or Deployment need to be deleted before upgrade.
+
+If `runAsStatefulSet: false` (this is the default):
+
+```console
+kubectl delete deploy -l app=prometheus-pushgateway
+```
+
+If `runAsStatefulSet: true`:
+
+```console
+kubectl delete sts -l app=prometheus-pushgateway
+```
+
+After that do the actual upgrade:
+
+```console
+helm upgrade -i prometheus-pushgateway prometheus-community/prometheus-pushgateway
+```
+
+## 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 show values prometheus-community/prometheus-pushgateway
+```

charts/prometheus-pushgateway/templates/NOTES.txt

@@ -0,0 +1,19 @@
+1. Get the application URL by running these commands:
+{{- if .Values.ingress.enabled }}
+{{- range .Values.ingress.hosts }}
+  http{{ if $.Values.ingress.tls }}s{{ end }}://{{ . }}{{ $.Values.ingress.path }}
+{{- end }}
+{{- else if contains "NodePort" .Values.service.type }}
+  export NODE_PORT=$(kubectl get --namespace {{ template "prometheus-pushgateway.namespace" . }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ template "prometheus-pushgateway.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ template "prometheus-pushgateway.namespace" . }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.service.type }}
+     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+           You can watch the status of by running 'kubectl get svc -w {{ template "prometheus-pushgateway.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ template "prometheus-pushgateway.namespace" . }} {{ template "prometheus-pushgateway.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 {{ template "prometheus-pushgateway.namespace" . }} -l "app.kubernetes.io/name={{ template "prometheus-pushgateway.name" . }},app.kubernetes.io/instance={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
+  kubectl port-forward $POD_NAME 9091
+  echo "Visit http://127.0.0.1:9091 to use your application"
+{{- end }}