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Prom metrics #49

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Prom metrics #49

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cfd9fb2
Create a prometheus metrics exporter as a sidecar
01100010011001010110010101110000 Oct 23, 2019
58128da
Update changelog and bump chart version
01100010011001010110010101110000 Oct 23, 2019
7f61e2b
Enable configuration of metrics image and resources
01100010011001010110010101110000 Nov 17, 2019
cbc125c
Add metrics documentation to the readme
01100010011001010110010101110000 Dec 2, 2019
ee16a72
Un-nest the metrics exporter image values
01100010011001010110010101110000 Dec 5, 2019
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3 changes: 3 additions & 0 deletions CHANGELOG.md
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@@ -1,5 +1,8 @@
# Changelog
#
## 0.2.6 October 22, 2019
- Add a prometheus exporter sidecar

## 0.2.5: August 30, 2019
- __Potentially breaking__: Add release namespace to all resources to work with `helm template`
See https://github.com/helm/helm/issues/5465 for more information.
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2 changes: 1 addition & 1 deletion stable/eventstore/Chart.yaml
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Expand Up @@ -2,7 +2,7 @@ apiVersion: v1
description: A Helm chart for Kubernetes EventStore.
name: eventstore
home: https://eventstore.org/
version: 0.2.5
version: 0.2.6
appVersion: 4.1.1-hotfix1
keywords:
- eventstore
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82 changes: 44 additions & 38 deletions stable/eventstore/README.md
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Expand Up @@ -68,44 +68,50 @@ associated with the chart and deletes the release.

The following table lists the configurable parameters of the Event Store chart and their default values.

| Parameter | Description | Default |
| ------------------------------------ | ----------------------------------------------------------------------------- | ---------------------------- |
| `image` | Container image name | `eventstore/eventstore` |
| `imageTag` | Container image tag | `release-4.1.1-hotfix1` |
| `imagePullPolicy` | Container pull policy | `IfNotPresent` |
| `imagePullSecrets` | Specify image pull secrets | `nil` |
| `clusterSize` | The number of nodes in the cluster | `3` |
| `admin.jobImage` | Post install Job image with `curl` installed for setting admin password | `tutum/curl` |
| `admin.jobImageTag` | Post install Job image tag | `latest` |
| `admin.password` | Custom password for admin interface (should be set in separate file) | `nil` |
| `admin.serviceType` | Service type for the admin interface | `ClusterIP` |
| `admin.proxyImage` | NGINX image for admin interface proxy | `nginx` |
| `admin.proxyImageTag` | NGINX image tag | `latest` |
| `podDisruptionBudget.enabled` | Enable a pod disruption budget for nodes | `false` |
| `podDisruptionBudget.minAvailable` | Number of pods that must still be available after eviction | `2` |
| `podDisruptionBudget.maxUnavailable` | Number of pods that can be unavailable after eviction | `nil` |
| `extIp` | External IP address | `0.0.0.0` |
| `intHttpPort` | Internal HTTP port | `2112` |
| `extHttpPort` | External HTTP port | `2113` |
| `intTcpPort` | Internal TCP port | `1112` |
| `extTcpPort` | External TCP port | `1113` |
| `gossipAllowedDiffMs` | The amount of drift, in ms, between clocks on nodes before gossip is rejected | `600000` |
| `eventStoreConfig` | Additional Event Store parameters | `{}` |
| `scavenging.enabled` | Enable the scavenging CronJob for all nodes | `false` |
| `scavenging.image` | The image to use for the scavenging CronJob | `lachlanevenson/k8s-kubectl` |
| `scavenging.imageTag` | The image tag use for the scavenging CronJob | `latest` |
| `scavenging.schedule` | The schedule to use for the scavenging CronJob | `0 2 * * *` |
| `persistence.enabled` | Enable persistence using PVC | `false` |
| `persistence.existingClaim` | Provide an existing PVC | `nil` |
| `persistence.accessMode` | Access Mode for PVC | `ReadWriteOnce` |
| `persistence.size` | Size of data volume | `8Gi` |
| `persistence.mountPath` | Mount path of data volume | `/var/lib/eventstore` |
| `persistence.annotations` | Annotations for PVC | `{}` |
| `resources` | CPU/Memory resource request/limits | Memory: `256Mi`, CPU: `100m` |
| `nodeSelector` | Node labels for pod assignment | `{}` |
| `podAnnotations` | Pod annotations | `{}` |
| `tolerations` | Toleration labels for pod assignment | `[]` |
| `affinity` | Affinity settings for pod assignment | `{}` |
| Parameter | Description | Default |
| ------------------------------------ | ----------------------------------------------------------------------------- | --------------------------------- |
| `image` | Container image name | `eventstore/eventstore` |
| `imageTag` | Container image tag | `release-4.1.1-hotfix1` |
| `imagePullPolicy` | Container pull policy | `IfNotPresent` |
| `imagePullSecrets` | Specify image pull secrets | `nil` |
| `clusterSize` | The number of nodes in the cluster | `3` |
| `admin.jobImage` | Post install Job image with `curl` installed for setting admin password | `tutum/curl` |
| `admin.jobImageTag` | Post install Job image tag | `latest` |
| `admin.password` | Custom password for admin interface (should be set in separate file) | `nil` |
| `admin.serviceType` | Service type for the admin interface | `ClusterIP` |
| `admin.proxyImage` | NGINX image for admin interface proxy | `nginx` |
| `admin.proxyImageTag` | NGINX image tag | `latest` |
| `podDisruptionBudget.enabled` | Enable a pod disruption budget for nodes | `false` |
| `podDisruptionBudget.minAvailable` | Number of pods that must still be available after eviction | `2` |
| `podDisruptionBudget.maxUnavailable` | Number of pods that can be unavailable after eviction | `nil` |
| `extIp` | External IP address | `0.0.0.0` |
| `intHttpPort` | Internal HTTP port | `2112` |
| `extHttpPort` | External HTTP port | `2113` |
| `intTcpPort` | Internal TCP port | `1112` |
| `extTcpPort` | External TCP port | `1113` |
| `gossipAllowedDiffMs` | The amount of drift, in ms, between clocks on nodes before gossip is rejected | `600000` |
| `eventStoreConfig` | Additional Event Store parameters | `{}` |
| `scavenging.enabled` | Enable the scavenging CronJob for all nodes | `false` |
| `scavenging.image` | The image to use for the scavenging CronJob | `lachlanevenson/k8s-kubectl` |
| `scavenging.imageTag` | The image tag use for the scavenging CronJob | `latest` |
| `scavenging.schedule` | The schedule to use for the scavenging CronJob | `0 2 * * *` |
| `persistence.enabled` | Enable persistence using PVC | `false` |
| `persistence.existingClaim` | Provide an existing PVC | `nil` |
| `persistence.accessMode` | Access Mode for PVC | `ReadWriteOnce` |
| `persistence.size` | Size of data volume | `8Gi` |
| `persistence.mountPath` | Mount path of data volume | `/var/lib/eventstore` |
| `persistence.annotations` | Annotations for PVC | `{}` |
| `resources` | CPU/Memory resource request/limits | Memory: `256Mi`, CPU: `100m` |
| `nodeSelector` | Node labels for pod assignment | `{}` |
| `podAnnotations` | Pod annotations | `{}` |
| `tolerations` | Toleration labels for pod assignment | `[]` |
| `affinity` | Affinity settings for pod assignment | `{}` |
| `metrics.enabled` | Enable a sidecar to export prometheus metrics | `false` |
| `metrics.image` | Docker repository from which to pull the metrics exporter image | `marcinbudny/eventstore_exporter` |
| `metrics.imageTag` | Metrics exporter image tag to pull | `0.7.0` |
| `metrics.port` | Metrics exporter port | `9448` |
| `metrics.resources` | CPU/Memory resource requests/limits for the metrics exporter | `{}` |


Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`
or create a `values.yaml` file and use `helm install --values values.yaml`.
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36 changes: 30 additions & 6 deletions stable/eventstore/templates/eventstore-statefulset.yaml
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Expand Up @@ -22,14 +22,17 @@ spec:
metadata:
annotations:
checksum/config: {{ include (print $.Template.BasePath "/eventstore-configmap.yaml") . | sha256sum }}
{{- if .Values.metrics.enabled }}
prometheus.io/scrape: "true"
prometheus.io/port: {{ .Values.metrics.port | quote }}
{{- end }}
{{- if .Values.podAnnotations }}
{{ toYaml .Values.podAnnotations | indent 8 }}
{{- end }}
labels:
app.kubernetes.io/name: {{ include "eventstore.name" . }}
app.kubernetes.io/instance: {{ .Release.Name }}
app.kubernetes.io/component: database
{{- if .Values.podAnnotations }}
annotations:
{{ toYaml .Values.podAnnotations | indent 8 }}
{{- end }}
spec:
nodeSelector:
{{ toYaml .Values.nodeSelector | indent 8 }}
Expand All @@ -44,6 +47,26 @@ spec:
{{- end}}
{{- end }}
containers:
{{- if .Values.metrics.enabled }}
- name: prometheus-exporter
image: "{{ .Values.metrics.image }}:{{ .Values.metrics.imageTag }}"
imagePullPolicy: {{ .Values.imagePullPolicy }}
env:
- name: EVENTSTORE_USER
value: admin
- name: EVENTSTORE_PASSWORD
value: {{- if .Values.admin.password }} {{- .Values.admin.password }} {{- else }} changeit {{- end }}
- name: PORT
value: {{ .Values.metrics.port | quote }}
- name: CLUSTER_MODE
value: {{- if and .Values.extIp (gt (.Values.clusterSize | float64) 1.0) }} cluster {{- else }} single {{- end }}
ports:
- name: metrics
containerPort: {{ .Values.metrics.port }}
{{- if .Values.metrics.resources }}
resources: {{- toYaml .Values.metrics.resources | nindent 12 -}}
{{- end }}
{{- end }}
- name: {{ .Chart.Name }}
image: "{{ .Values.image }}:{{ .Values.imageTag }}"
imagePullPolicy: {{ .Values.imagePullPolicy }}
Expand Down Expand Up @@ -88,8 +111,9 @@ spec:
initialDelaySeconds: 15
timeoutSeconds: 5
periodSeconds: 15
resources:
{{ toYaml .Values.resources | indent 12 }}
{{- if .Values.resources }}
resources: {{- toYaml .Values.resources | nindent 12 -}}
{{- end }}
volumeMounts:
- name: data
mountPath: {{ .Values.persistence.mountPath }}
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9 changes: 9 additions & 0 deletions stable/eventstore/values.yaml
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Expand Up @@ -124,6 +124,15 @@ persistence:
mountPath: /var/lib/eventstore
annotations: {}

## Export prometheus metrics
metrics:
enabled: false
image: marcinbudny/eventstore_exporter
imageTag: 0.7.0
## The port on which the exporter sidecar will expose its metrics
port: 9448
resources: {}

resources: {}
## If you want to specify resources, uncomment the following
## lines, adjust them as necessary, and remove the curly braces after 'resources:'.
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