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mariadb: adds prometheus metrics sidecar container (#1330)

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* mariadb: adds prometheus metrics sidecar container

Adds `prom/mysqld-exporter` sidecar container to expose
a metrics endpoint for prometheus. The exporter should be
enabled using `metrics.enable=true` while deploying the
chart.

Bumps the chart version to `0.7.0`

* mariadb: expose `9104` port when `metrics` are enabled
This commit is contained in:
Sameer Naik
2017-08-02 09:54:40 -05:00
committed by Michael Goodness
parent 05024c43e2
commit 83a0fca27d
5 changed files with 57 additions and 16 deletions
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stable/mariadb/Chart.yaml
+1 -1
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@@ -1,5 +1,5 @@
name: mariadb
version: 0.6.3
version: 0.7.0
description: Fast, reliable, scalable, and easy to use open-source relational database system. MariaDB Server is intended for mission-critical, heavy-load production systems as well as for embedding into mass-deployed software.
keywords:
- mariadb
stable/mariadb/README.md
+24 -15
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@@ -45,21 +45,26 @@ The command removes all the Kubernetes components associated with the chart and
The following tables lists the configurable parameters of the MariaDB chart and their default values.
| Parameter | Description | Default |
| ----------------------- | ---------------------------------- | ---------------------------------------------------------- |
| `image` | MariaDB image | `bitnami/mariadb:{VERSION}` |
| `imagePullPolicy` | Image pull policy. | `IfNotPresent` |
| `mariadbRootPassword` | Password for the `root` user. | `nil` |
| `mariadbUser` | Username of new user to create. | `nil` |
| `mariadbPassword` | Password for the new user. | `nil` |
| `mariadbDatabase` | Name for new database to create. | `nil` |
| `persistence.enabled` | Use a PVC to persist data | `true` |
| `persistence.existingClaim` | Use an existing PVC | `nil` |
| `persistence.storageClass` | Storage class of backing PVC | `nil` (uses alpha storage class annotation) |
| `persistence.accessMode` | Use volume as ReadOnly or ReadWrite | `ReadWriteOnce` |
| `persistence.size` | Size of data volume | `8Gi` |
| `resources` | CPU/Memory resource requests/limits | Memory: `256Mi`, CPU: `250m` |
| `config` | Multi-line string for my.cnf configuration | `nil` |
| Parameter | Description | Default |
|-----------------------------|--------------------------------------------|---------------------------------------------|
| `image` | MariaDB image | `bitnami/mariadb:{VERSION}` |
| `imagePullPolicy` | Image pull policy. | `IfNotPresent` |
| `mariadbRootPassword` | Password for the `root` user. | `nil` |
| `mariadbUser` | Username of new user to create. | `nil` |
| `mariadbPassword` | Password for the new user. | `nil` |
| `mariadbDatabase` | Name for new database to create. | `nil` |
| `persistence.enabled` | Use a PVC to persist data | `true` |
| `persistence.existingClaim` | Use an existing PVC | `nil` |
| `persistence.storageClass` | Storage class of backing PVC | `nil` (uses alpha storage class annotation) |
| `persistence.accessMode` | Use volume as ReadOnly or ReadWrite | `ReadWriteOnce` |
| `persistence.size` | Size of data volume | `8Gi` |
| `resources` | CPU/Memory resource requests/limits | Memory: `256Mi`, CPU: `250m` |
| `config` | Multi-line string for my.cnf configuration | `nil` |
| `metrics.enabled` | Start a side-car prometheus exporter | `false` |
| `metrics.image` | Exporter image | `prom/mysqld-exporter` |
| `metrics.imageTag` | Exporter image | `v0.10.0` |
| `metrics.imagePullPolicy` | Exporter image pull policy | `IfNotPresent` |
| `metrics.resources` | Exporter resource requests/limit | `nil` |
The above parameters map to the env variables defined in [bitnami/mariadb](http://github.com/bitnami/bitnami-docker-mariadb). For more information please refer to the [bitnami/mariadb](http://github.com/bitnami/bitnami-docker-mariadb) image documentation.
@@ -117,3 +122,7 @@ The chart mounts a [Persistent Volume](http://kubernetes.io/docs/user-guide/pers
```bash
$ helm install --set persistence.existingClaim=PVC_NAME postgresql
```
## Metrics
The chart can optionally start a metrics exporter endpoint on port `9104` for [prometheus](https://prometheus.io). The data exposed by the endpoint is intended to be consumed by a prometheus chart deployed within the cluster and as such the endpoint is not exposed outside the cluster.
stable/mariadb/templates/deployment.yaml
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@@ -73,6 +73,19 @@ spec:
timeoutSeconds: 1
resources:
{{ toYaml .Values.resources | indent 10 }}
{{- if .Values.metrics.enabled }}
- name: metrics
image: "{{ .Values.metrics.image }}:{{ .Values.metrics.imageTag }}"
imagePullPolicy: {{ .Values.metrics.imagePullPolicy | quote }}
env:
- name: DATA_SOURCE_NAME
value: "root:{{ .Values.mariadbRootPassword }}@(localhost:3306)/"
ports:
- name: metrics
containerPort: 9104
resources:
{{ toYaml .Values.metrics.resources | indent 10 }}
{{- end }}
volumeMounts:
- name: data
mountPath: /bitnami/mariadb
stable/mariadb/templates/svc.yaml
+9
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@@ -7,11 +7,20 @@ metadata:
chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
release: "{{ .Release.Name }}"
heritage: "{{ .Release.Service }}"
{{- if .Values.metrics.enabled }}
annotations:
{{ toYaml .Values.metrics.annotations | indent 4 }}
{{- end }}
spec:
type: {{ .Values.serviceType }}
ports:
- name: mysql
port: 3306
targetPort: mysql
{{- if .Values.metrics.enabled }}
- name: metrics
port: 9104
targetPort: metrics
{{- end }}
selector:
app: {{ template "fullname" . }}
stable/mariadb/values.yaml
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@@ -54,6 +54,16 @@ persistence:
# [mysqld]
# innodb_buffer_pool_size=2G
metrics:
enabled: false
image: prom/mysqld-exporter
imageTag: v0.10.0
imagePullPolicy: IfNotPresent
resources: {}
annotations:
prometheus.io/scrape: "true"
prometheus.io/port: "9104"
## Configure resource requests and limits
## ref: http://kubernetes.io/docs/user-guide/compute-resources/
##