feat: Write file logs to an emptyDir

CHANGELOG.md

@@ -22,13 +22,15 @@ All notable changes to this project will be documented in this file.
   `serviceAccount.name`; it used to fall back to the namespace default ServiceAccount, which lacks
   the operator ClusterRole ([#418]).
 - Install default resources regardless of CRD maintenance flag ([#439]).
+- File logging no longer crash-loops the operator when the root filesystem is read-only, as it is on OpenShift. Logs are written to an `emptyDir` at `/var/log/listener-operator` ([#444]).
 
 [#411]: https://github.com/stackabletech/listener-operator/pull/411
 [#416]: https://github.com/stackabletech/listener-operator/pull/416
 [#418]: https://github.com/stackabletech/listener-operator/pull/418
 [#434]: https://github.com/stackabletech/listener-operator/pull/434
 [#439]: https://github.com/stackabletech/listener-operator/pull/439
 [#441]: https://github.com/stackabletech/listener-operator/pull/441
+[#444]: https://github.com/stackabletech/listener-operator/pull/444
 
 ## [26.7.0] - 2026-07-21
 

deploy/helm/listener-operator/templates/csi-node-driver-daemonset.yaml

@@ -91,6 +91,10 @@ spec:
               mountPath: /csi
             - name: mountpoint
               mountPath: {{ .Values.kubeletDir }}/pods
+            {{- if .Values.telemetry.fileLog.enabled }}
+            - name: log
+              mountPath: {{ include "listener-operator.telemetry.fileLogDirectory" . }}
+            {{- end }}
         - name: node-driver-registrar
           image: "{{ include "listener-operator.csi-node-driver-registrar.image" . }}"
           imagePullPolicy: {{ .Values.csiNodeDriver.nodeDriverRegistrar.image.pullPolicy }}
@@ -116,6 +120,10 @@ spec:
         - name: mountpoint
           hostPath:
             path: {{ .Values.kubeletDir }}/pods/
+        {{- if .Values.telemetry.fileLog.enabled }}
+        - name: log
+          emptyDir: {}
+        {{- end }}
       {{- with .Values.csiNodeDriver.nodeSelector }}
       nodeSelector:
         {{- toYaml . | nindent 8 }}

deploy/helm/listener-operator/templates/csi-provisioner-deployment.yaml

@@ -97,6 +97,10 @@ spec:
           volumeMounts:
             - name: csi
               mountPath: /csi
+            {{- if .Values.telemetry.fileLog.enabled }}
+            - name: log
+              mountPath: {{ include "listener-operator.telemetry.fileLogDirectory" . }}
+            {{- end }}
           startupProbe:
             httpGet:
               path: /ready
@@ -120,6 +124,10 @@ spec:
       volumes:
         - name: csi
           emptyDir: {}
+        {{- if .Values.telemetry.fileLog.enabled }}
+        - name: log
+          emptyDir: {}
+        {{- end }}
       {{- with .Values.csiProvisioner.nodeSelector }}
       nodeSelector:
         {{- toYaml . | nindent 8 }}

deploy/helm/listener-operator/values.schema.json

@@ -434,14 +434,14 @@
         },
         "fileLog": {
           "title": "File logs",
-          "description": "Writes logs to /stackable/logs inside the container.",
+          "description": "Writes logs to /var/log/listener-operator inside the container, on an emptyDir volume.",
           "type": "object",
           "additionalProperties": false,
           "properties": {
             "enabled": {
               "type": "boolean",
               "default": false,
-              "description": "Whether the operator also writes logs to /stackable/logs inside the container. Off by default: it needs a volume to be useful, otherwise the logs vanish with the pod."
+              "description": "Whether the operator also writes logs to /var/log/listener-operator inside the container. Off by default. The logs survive container restarts but not the Pod."
             },
             "level": {
               "title": "File log level",