[stable/rabbitmq] Log to stdout and add metrics exporter (#8337)

* [stable/rabbitmq] Log to stdout and add metrics exporter

Signed-off-by: Javier J. Salmeron Garcia <jsalmeron@bitnami.com>

* Update readme

Signed-off-by: Javier J. Salmeron Garcia <jsalmeron@bitnami.com>

stable/rabbitmq/Chart.yaml

@@ -1,5 +1,5 @@
 name: rabbitmq
-version: 3.3.6
+version: 3.4.0
 appVersion: 3.7.8
 description: Open source message broker software that implements the Advanced Message Queuing Protocol (AMQP)
 keywords:

stable/rabbitmq/README.md

@@ -96,6 +96,12 @@ The following table lists the configurable parameters of the RabbitMQ chart and
 | `readinessProbe.periodSeconds   `     | number of seconds                                       |  5                                             |
 | `readinessProbe.failureThreshold`     | number of failures                                      |  3                                             |
 | `readinessProbe.successThreshold`     | number of successes                                     |  1                                             |
+| `metrics.enabled`                         | Start a side-car prometheus exporter                | `false`                                                           |
+| `metrics.image.registry`                  | Exporter image registry                             | `docker.io`                                                       |
+| `metrics.image.repository`                | Exporter image name                                 | `kbudde/rabbitmq-exporter`                                            |
+| `metrics.image.tag`                       | Exporter image tag                                  | `v0.29.0`                                                         |
+| `metrics.image.pullPolicy`                | Exporter image pull policy                          | `IfNotPresent`                                                    |
+| `metrics.resources`                       | Exporter resource requests/limit                    | `nil`                                                             |
 
 The above parameters map to the env variables defined in [bitnami/rabbitmq](http://github.com/bitnami/bitnami-docker-rabbitmq). For more information please refer to the [bitnami/rabbitmq](http://github.com/bitnami/bitnami-docker-rabbitmq) image documentation.
 

stable/rabbitmq/templates/_helpers.tpl

@@ -30,3 +30,13 @@ Create chart name and version as used by the chart label.
 {{- define "rabbitmq.chart" -}}
 {{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
 {{- end -}}
+
+{{/*
+Return the proper metrics image name
+*/}}
+{{- define "metrics.image" -}}
+{{- $registryName :=  .Values.metrics.image.registry -}}
+{{- $repositoryName := .Values.metrics.image.repository -}}
+{{- $tag := .Values.metrics.image.tag | toString -}}
+{{- printf "%s/%s:%s" $registryName $repositoryName $tag -}}
+{{- end -}}

stable/rabbitmq/templates/statefulset.yaml

@@ -48,7 +48,7 @@ spec:
       {{- end }}
       terminationGracePeriodSeconds: 10
       containers:
-      - name: {{ template "rabbitmq.fullname" . }}
+      - name: rabbitmq
         image: "{{ .Values.image.registry }}/{{ .Values.image.repository }}:{{ .Values.image.tag }}"
         imagePullPolicy: {{ .Values.image.pullPolicy | quote }}
         command:
@@ -68,6 +68,9 @@ spec:
             ulimit -n "${RABBITMQ_ULIMIT_NOFILES}"
             #replace the default password that is generated
             sed -i "s/CHANGEME/$RABBITMQ_PASSWORD/g" /opt/bitnami/rabbitmq/etc/rabbitmq/rabbitmq.conf
+            # Move logs to stdout
+            ln -sF /dev/stdout /opt/bitnami/rabbitmq/var/log/rabbitmq/rabbit@${MY_POD_IP}.log
+            ln -sF /dev/stdout /opt/bitnami/rabbitmq/var/log/rabbitmq/rabbit@${MY_POD_IP}_upgrade.log
             exec rabbitmq-server
         {{- if .Values.resources }}
         resources:
@@ -153,6 +156,39 @@ spec:
               secretKeyRef:
                 name: {{ template "rabbitmq.fullname" . }}
                 key: rabbitmq-password
+{{- if .Values.metrics.enabled }}
+      - name: metrics
+        image: {{ template "metrics.image" . }}
+        imagePullPolicy: {{ .Values.metrics.image.pullPolicy | quote }}
+        env:
+        - name: RABBIT_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: {{ template "rabbitmq.fullname" . }}
+              key: rabbitmq-password
+        - name: RABBIT_URL
+          value: "http://localhost:{{ .Values.rabbitmq.managerPort }}"
+        - name: RABBIT_USER
+          value: {{ .Values.rabbitmq.username }}
+        ports:
+        - name: metrics
+          containerPort: 9090
+        livenessProbe:
+          httpGet:
+            path: /metrics
+            port: metrics
+          initialDelaySeconds: 15
+          timeoutSeconds: 5
+        readinessProbe:
+          httpGet:
+            path: /metrics
+            port: metrics
+          initialDelaySeconds: 5
+          timeoutSeconds: 1
+        resources:
+{{ toYaml .Values.metrics.resources | indent 10 }}
+{{- end }}
+
       {{- if .Values.securityContext.enabled }}
       securityContext:
         fsGroup: {{ .Values.securityContext.fsGroup }}

stable/rabbitmq/templates/svc.yaml

@@ -7,6 +7,10 @@ metadata:
     chart: {{ template "rabbitmq.chart" .  }}
     release: "{{ .Release.Name }}"
     heritage: "{{ .Release.Service }}"
+{{- if .Values.metrics.enabled }}
+  annotations:
+{{ toYaml .Values.metrics.annotations | indent 4 }}
+{{- end }}
 spec:
   type: {{ .Values.serviceType }}
   ports:
@@ -25,6 +29,11 @@ spec:
   - name: stats
     port: {{ .Values.rabbitmq.managerPort }}
     targetPort: stats
+{{- if .Values.metrics.enabled }}
+  - name: metrics
+    port: 9090
+    targetPort: metrics
+{{- end }}
   selector:
     app: {{ template "rabbitmq.name" . }}
     release: "{{ .Release.Name }}"

stable/rabbitmq/values-production.yaml

@@ -186,3 +186,15 @@ readinessProbe:
   periodSeconds: 5
   failureThreshold: 3
   successThreshold: 1
+
+metrics:
+  enabled: true
+  image:
+    registry: docker.io
+    repository: kbudde/rabbitmq-exporter
+    tag: v0.29.0
+    pullPolicy: IfNotPresent
+  resources: {}
+  annotations:
+    prometheus.io/scrape: "true"
+    prometheus.io/port: "9090"

stable/rabbitmq/values.yaml

@@ -195,3 +195,15 @@ readinessProbe:
   periodSeconds: 5
   failureThreshold: 3
   successThreshold: 1
+
+metrics:
+  enabled: false
+  image:
+    registry: docker.io
+    repository: kbudde/rabbitmq-exporter
+    tag: v0.29.0
+    pullPolicy: IfNotPresent
+  resources: {}
+  annotations:
+    prometheus.io/scrape: "true"
+    prometheus.io/port: "9090"