Add ability to specify additional jvm options and config files (#20163)

I use this to override the log4j config to see the logs also on stdout.

Signed-off-by: Marco Kilchhofer <marco@kilchhofer.info>

charts/unifi/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v1
 appVersion: 5.11.50
 description: Ubiquiti Network's Unifi Controller
 name: unifi
-version: 0.5.2
+version: 0.6.0
 keywords:
   - ubiquiti
   - unifi

charts/unifi/README.md

@@ -94,6 +94,8 @@ The following tables lists the configurable parameters of the Unifi chart and th
 | `persistence.existingClaim`                  | Use an existing PVC to persist data                                                                                    | `nil`                        |
 | `persistence.storageClass`                   | Type of persistent volume claim                                                                                        | `-`                          |
 | `persistence.accessModes`                    | Persistence access modes                                                                                               | `[]`                         |
+| `extraConfigFiles`                           | Dictionary containing files mounted to `/configmap` inside the pod (See [values.yaml](values.yaml) for examples)       | `{}`                         |
+| `extraJvmOpts`                               | List of additional JVM options, e.g. `["-Dlog4j.configurationFile=file:/configmap/log4j2.xml"]`                        | `[]`                         |
 | `resources`                                  | CPU/Memory resource requests/limits                                                                                    | `{}`                         |
 | `nodeSelector`                               | Node labels for pod assignment                                                                                         | `{}`                         |
 | `tolerations`                                | Toleration labels for pod assignment                                                                                   | `[]`                         |

charts/unifi/templates/configmap.yaml

@@ -0,0 +1,13 @@
+{{- if .Values.extraConfigFiles }}
+kind: ConfigMap
+apiVersion: v1
+metadata:
+  name: {{ template "unifi.fullname" . }}
+  labels:
+    app.kubernetes.io/name: {{ include "unifi.name" . }}
+    helm.sh/chart: {{ include "unifi.chart" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+data:
+{{ toYaml .Values.extraConfigFiles | indent 2 }}
+{{- end }}

charts/unifi/templates/deployment.yaml

@@ -75,6 +75,10 @@ spec:
               value: "{{ .Values.UID }}"
             - name: UNIFI_GID
               value: "{{ .Values.GID }}"
+            {{- if .Values.extraJvmOpts }}
+            - name: JVM_EXTRA_OPTS
+              value: "{{- join " " .Values.extraJvmOpts }}"
+            {{- end }}
             {{- if .Values.mongodb.enabled }}
             - name: DB_URI
               value: "{{ .Values.mongodb.dbUri }}"
@@ -96,6 +100,10 @@ spec:
             - mountPath: /unifi/init.d
               name: unifi-data
               subPath: init.d
+            {{- if .Values.extraConfigFiles }}
+            - name: extra-config
+              mountPath: /configmap
+            {{- end }}
           resources:
 {{ toYaml .Values.resources | indent 12 }}
       volumes:
@@ -106,6 +114,11 @@ spec:
         {{- else }}
           emptyDir: {}
         {{ end }}
+        {{- if .Values.extraConfigFiles }}
+        - name: extra-config
+          configMap:
+            name: {{ template "unifi.fullname" . }}
+        {{- end }}
     {{- with .Values.nodeSelector }}
       nodeSelector:
 {{ toYaml . | indent 8 }}

charts/unifi/values.yaml

@@ -166,6 +166,43 @@ persistence:
   accessMode: ReadWriteOnce
   size: 5Gi
 
+extraJvmOpts: []
+  ## Extra java options
+  ## Here are some examples of valid JVM options:
+  ##
+  # - "-XX:MaxMetaspaceSize=256m"
+  # - "-Dlog4j.configurationFile=file:/configmap/log4j2.xml"
+  # - "-Dsystem_ip=1.2.3.4"
+
+extraConfigFiles: {}
+  ## Specify additional config files which are mounted to /configmap
+  ## Here is an example for a custom log4j config:
+  ##
+  # log4j2.xml: |-
+  #   <?xml version="1.0" encoding="UTF-8"?>
+  #   <Configuration>
+  #     <Appenders>
+  #       <InMemoryAppender name="InMemoryAppender" activatedLogging="false">
+  #         <PatternLayout pattern="[%d{ISO8601}] &lt;%t&gt; %-5p %-6c{1} - %m%n" />
+  #       </InMemoryAppender>
+  #       <RollingFile name="server_log" fileName="logs/server.log" filePattern="logs/server.log.%i">
+  #         <PatternLayout pattern="[%d{ISO8601}] &lt;%t&gt; %-5p %-6c{1} - %m%n" />
+  #         <SizeBasedTriggeringPolicy size="10 MB"/>
+  #         <DefaultRolloverStrategy max="3" fileIndex="min" />
+  #       </RollingFile>
+  #       <Console name="STDOUT" target="SYSTEM_OUT">
+  #         <PatternLayout pattern="&lt;%t&gt; %-5p %-6c{1} - %m%n"/>
+  #       </Console>
+  #     </Appenders>
+  #     <Loggers>
+  #       <Root level="INFO">
+  #         <AppenderRef ref="InMemoryAppender" />
+  #         <AppenderRef ref="server_log" />
+  #         <AppenderRef ref="STDOUT" />
+  #       </Root>
+  #     </Loggers>
+  #   </Configuration>
+
 resources: {}
   # We usually recommend not to specify default resources and to leave this as a conscious
   # choice for the user. This also increases chances charts run on environments with little