add support to use pattern files

logstash/README.md

@@ -121,6 +121,8 @@ useful for the [http input plugin][], for instance.
 | `logstashConfig`          | Allows you to add any config files in `/usr/share/logstash/config/` such as `logstash.yml` and `log4j2.properties` See [values.yaml][] for an example of the formatting                                                              | `{}`                                  |
 | `logstashJavaOpts`        | Java options for Logstash. This is where you should configure the JVM heap size                                                                                                                                                      | `-Xmx1g -Xms1g`                       |
 | `logstashPipeline`        | Allows you to add any pipeline files in `/usr/share/logstash/pipeline/`                                                                                                                                                              | `{}`                                  |
+| `logstashPatternDir`      | Allows you to define a custom directory to store patten files | `/usr/share/logstash/patterns/` |
+| `logstashPipeline`        | Allows you to add any pattern files in `logstashPatternDir` | `{}` |
 | `maxUnavailable`          | The [maxUnavailable][] value for the pod disruption budget. By default this will prevent Kubernetes from having more than 1 unhealthy pod in the node group                                                                          | `1`                                   |
 | `nameOverride`            | Overrides the chart name for resources. If not set the name will default to `.Chart.Name`                                                                                                                                            | `""`                                  |
 | `nodeAffinity`            | Value for the [node affinity settings][]                                                                                                                                                                                             | `{}`                                  |

logstash/templates/configmap-pattern.yaml

@@ -0,0 +1,17 @@
+{{- if .Values.logstashPattern }}
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ template "logstash.fullname" . }}-pattern
+  labels:
+    app: "{{ template "logstash.fullname" . }}"
+    chart: "{{ .Chart.Name }}"
+    heritage: {{ .Release.Service | quote }}
+    release: {{ .Release.Name | quote }}
+data:
+{{- range $path, $config := .Values.logstashPattern }}
+  {{ $path }}: |
+{{ tpl $config $ | indent 4 -}}
+{{- end -}}
+{{- end -}}

logstash/templates/statefulset.yaml

@@ -55,6 +55,9 @@ spec:
         {{- if .Values.logstashPipeline }}
         pipelinechecksum: {{ include (print .Template.BasePath "/configmap-pipeline.yaml") . | sha256sum | trunc 63 }}
         {{- end }}
+        {{- if .Values.logstashPattern }}
+        patternchecksum: {{ include (print .Template.BasePath "/configmap-pattern.yaml") . | sha256sum | trunc 63 }}
+        {{- end }}
         {{- if .Values.secrets }}
         secretschecksum: {{ include (print .Template.BasePath "/secret.yaml") . | sha256sum | trunc 63 }}
         {{- end }}
@@ -127,6 +130,11 @@ spec:
           configMap:
             name: {{ template "logstash.fullname" . }}-pipeline
         {{- end }}
+        {{- if .Values.logstashPattern }}
+        - name: logstashpattern
+          configMap:
+            name: {{ template "logstash.fullname" . }}-pattern
+        {{- end }}
       {{- if .Values.extraVolumes }}
 {{ tpl .Values.extraVolumes . | indent 8 }}
       {{- end }}
@@ -188,6 +196,14 @@ spec:
             mountPath: /usr/share/logstash/pipeline/{{ $path }}
             subPath: {{ $path }}
           {{- end -}}
+          {{- if .Values.logstashPattern }}
+          {{- $logstashPatternDir := .Values.logstashPatternDir -}}
+          {{- range $path, $config := .Values.logstashPattern }}
+          - name: logstashpattern
+            mountPath: {{ $logstashPatternDir }}{{ $path }}
+            subPath: {{ $path }} 
+          {{- end -}}
+          {{- end -}}
         {{- if .Values.extraVolumeMounts }}
 {{ tpl .Values.extraVolumeMounts . | indent 10 }}
         {{- end }}

logstash/values.yaml

@@ -25,6 +25,12 @@ logstashPipeline: {}
 #    }
 #    output { stdout { } }
 
+# Allows you to add any pattern files in your custom pattern dir
+logstashPatternDir: "/usr/share/logstash/patterns/"
+logstashPattern: {}
+#    pattern.conf: |
+#      DPKG_VERSION [-+~<>\.0-9a-zA-Z]+
+
 # Extra environment variables to append to this nodeGroup
 # This will be appended to the current 'env:' key. You can use any of the kubernetes env
 # syntax here