diff --git a/kubernetes/apps/monitoring/pve-exporter-deployment.yaml b/kubernetes/apps/monitoring/pve-exporter-deployment.yaml
index d57aa1d1..c073c089 100644
--- a/kubernetes/apps/monitoring/pve-exporter-deployment.yaml
+++ b/kubernetes/apps/monitoring/pve-exporter-deployment.yaml
@@ -52,10 +52,15 @@ spec:
             - name: config
               mountPath: /etc/pve-exporter
               readOnly: true
+            # Python needs a writable temp dir; the rootfs is read-only.
+            - name: tmp
+              mountPath: /tmp
       volumes:
         - name: config
           secret:
             secretName: pve-exporter-config
+        - name: tmp
+          emptyDir: {}
 ---
 apiVersion: v1
 kind: Service