[stable/fluentd] Added support for plugin installation (#16705)

* Added support for plugin installation via chart

Signed-off-by: Aaron Layfield <aaron.layfield@gmail.com>

* Removed testing default values

Signed-off-by: Aaron Layfield <aaron.layfield@gmail.com>

* Increment Chart Version

Signed-off-by: Aaron Layfield <aaron.layfield@gmail.com>

* Adding check on plugin list empty

Signed-off-by: Aaron Layfield <aaron.layfield@gmail.com>

stable/fluentd/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v1
 description: A Fluentd Elasticsearch Helm chart for Kubernetes.
 icon: https://raw.githubusercontent.com/fluent/fluentd-docs/master/public/logo/Fluentd_square.png
 name: fluentd
-version: 2.0.3
+version: 2.1.3
 appVersion: v2.4.0
 home: https://www.fluentd.org/
 sources:

stable/fluentd/README.md

@@ -65,6 +65,8 @@ Parameter | Description | Default
 `nodeSelector` | node labels for pod assignment | `{}`
 `replicaCount` | desired number of pods | `1` ???
 `resources` | pod resource requests & limits | `{}`
+`plugins.enabled` | Enable Plugins Installation | `false`
+`plugins.pluginsList` | List of plugins to install | `[]`
 `rbac.create` | Specifies whether RBAC resources should be created | `true`
 `serviceAccount.create` | Specifies whether a service account should be created. | `true`
 `serviceAccount.name` | Name of the service account.

stable/fluentd/templates/configmap.yaml

@@ -27,3 +27,11 @@ data:
       @type prometheus_output_monitor
     </source>
 {{- end }}
+{{- if and (.Values.plugins.enabled) (gt (len .Values.plugins.pluginsList) 0) }}
+  install-plugins.sh: |-
+    #!/bin/sh
+  {{- range $plugin := .Values.plugins.pluginsList }}
+    fluent-gem install {{ $plugin }}
+  {{- end }}
+    exec /run.sh
+{{- end }}

stable/fluentd/templates/deployment.yaml

@@ -43,6 +43,9 @@ spec:
       - name: {{ .Chart.Name }}
         image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
         imagePullPolicy: {{ .Values.image.pullPolicy }}
+      {{- if and (.Values.plugins.enabled) (gt (len .Values.plugins.pluginsList) 0) }}
+        command: ["/bin/sh", "-c", "/etc/fluent/config.d/install-plugins.sh"]
+      {{- end }}
         env:
           - name: OUTPUT_HOST
             value: {{ .Values.output.host | quote }}
@@ -99,6 +102,7 @@ spec:
         - name: config-volume-{{ template "fluentd.fullname" . }}
           configMap:
             name: {{ template "fluentd.fullname" . }}
+            defaultMode: 0777
         {{- if and .Values.persistence.enabled (not .Values.autoscaling.enabled) }}
         - name: buffer          
           persistentVolumeClaim:

stable/fluentd/values.yaml

@@ -27,6 +27,10 @@ extraEnvVars:
 #        name: secret_name
 #        key: secret_key
 
+plugins:
+  enabled: false
+  pluginsList: []
+
 service:
   annotations: {}
   type: ClusterIP