diff --git a/nova/templates/configmap-etc.yaml b/nova/templates/configmap-etc.yaml
index d1a55f5c80..55aa31142b 100644
--- a/nova/templates/configmap-etc.yaml
+++ b/nova/templates/configmap-etc.yaml
@@ -189,7 +189,7 @@ limitations under the License.
 {{- end -}}
 
 {{- if empty .Values.conf.nova.ironic.memcache_secret_key -}}
-{{- $_ := randAlphaNum 64 | set .Values.conf.nova.ironic "memcache_secret_key" -}}
+{{- $_ := (default (randAlphaNum 64) .Values.endpoints.oslo_cache.auth.memcache_secret_key) | set .Values.conf.nova.ironic "memcache_secret_key" -}}
 {{- end -}}
 
 {{- if empty .Values.conf.nova.ironic.memcache_servers -}}