fix: pod startup on openshift

Signed-off-by: Benedikt Bongartz <[email protected]>

k8s/lgtm.yaml

@@ -46,3 +46,21 @@ spec:
               command:
                 - cat
                 - /tmp/ready
+      # NOTE: By default OpenShift does not allow writing the root directory.
+      # Thats why the data dirs for grafana, prometheus and loki can not be 
+      # created and the pod never becomes ready.
+      # See: https://github.com/grafana/docker-otel-lgtm/issues/132
+          volumeMounts:
+            - name: grafana-data
+              mountPath: /otel-lgtm/grafana/data
+            - name: loki-storage
+              mountPath: /loki
+            - name: p8s-storage
+              mountPath: /data/prometheus
+      volumes:
+        - name: grafana-data
+          emptyDir: {}
+        - name: loki-storage
+          emptyDir: {}
+        - name: p8s-storage
+          emptyDir: {}