diff --git a/cinder/Chart.yaml b/cinder/Chart.yaml
index 89c0330ce3..e3afc22c37 100644
--- a/cinder/Chart.yaml
+++ b/cinder/Chart.yaml
@@ -14,7 +14,7 @@ apiVersion: v1
 appVersion: v1.0.0
 description: OpenStack-Helm Cinder
 name: cinder
-version: 0.3.6
+version: 0.3.7
 home: https://docs.openstack.org/cinder/latest/
 icon: https://www.openstack.org/themes/openstack/images/project-mascots/Cinder/OpenStack_Project_Cinder_vertical.png
 sources:
diff --git a/cinder/templates/bin/_backup-storage-init.sh.tpl b/cinder/templates/bin/_backup-storage-init.sh.tpl
index cd2389c211..a50ecb74cf 100644
--- a/cinder/templates/bin/_backup-storage-init.sh.tpl
+++ b/cinder/templates/bin/_backup-storage-init.sh.tpl
@@ -37,7 +37,7 @@ elif [[ $STORAGE_BACKEND =~ 'cinder.backup.drivers.ceph' ]]; then
     fi
     size_protection=$(ceph osd pool get $1 nosizechange | cut -f2 -d: | tr -d '[:space:]')
     ceph osd pool set $1 nosizechange 0
-    ceph osd pool set $1 size ${RBD_POOL_REPLICATION}
+    ceph osd pool set $1 size ${RBD_POOL_REPLICATION} --yes-i-really-mean-it
     ceph osd pool set $1 nosizechange ${size_protection}
     ceph osd pool set $1 crush_rule "${RBD_POOL_CRUSH_RULE}"
   }
diff --git a/cinder/templates/bin/_storage-init.sh.tpl b/cinder/templates/bin/_storage-init.sh.tpl
index a43115e423..4f945e2cd6 100644
--- a/cinder/templates/bin/_storage-init.sh.tpl
+++ b/cinder/templates/bin/_storage-init.sh.tpl
@@ -34,7 +34,7 @@ if [ "x$STORAGE_BACKEND" == "xcinder.volume.drivers.rbd.RBDDriver" ]; then
     fi
     size_protection=$(ceph osd pool get $1 nosizechange | cut -f2 -d: | tr -d '[:space:]')
     ceph osd pool set $1 nosizechange 0
-    ceph osd pool set $1 size ${RBD_POOL_REPLICATION}
+    ceph osd pool set $1 size ${RBD_POOL_REPLICATION} --yes-i-really-mean-it
     ceph osd pool set $1 nosizechange ${size_protection}
     ceph osd pool set $1 crush_rule "${RBD_POOL_CRUSH_RULE}"
   }
diff --git a/glance/Chart.yaml b/glance/Chart.yaml
index 7ce28411a1..e0faed51a5 100644
--- a/glance/Chart.yaml
+++ b/glance/Chart.yaml
@@ -14,7 +14,7 @@ apiVersion: v1
 appVersion: v1.0.0
 description: OpenStack-Helm Glance
 name: glance
-version: 0.4.1
+version: 0.4.2
 home: https://docs.openstack.org/glance/latest/
 icon: https://www.openstack.org/themes/openstack/images/project-mascots/Glance/OpenStack_Project_Glance_vertical.png
 sources:
diff --git a/glance/templates/bin/_storage-init.sh.tpl b/glance/templates/bin/_storage-init.sh.tpl
index cf6fecbf13..0d291fd29a 100644
--- a/glance/templates/bin/_storage-init.sh.tpl
+++ b/glance/templates/bin/_storage-init.sh.tpl
@@ -49,7 +49,7 @@ elif [ "x$STORAGE_BACKEND" == "xrbd" ]; then
     if [[ $(ceph mgr versions | awk '/version/{print $3}' | cut -d. -f1) -ge 12 ]]; then
         ceph osd pool application enable $1 $3
     fi
-    ceph osd pool set "$1" size "${RBD_POOL_REPLICATION}"
+    ceph osd pool set "$1" size "${RBD_POOL_REPLICATION}" --yes-i-really-mean-it
     ceph osd pool set "$1" crush_rule "${RBD_POOL_CRUSH_RULE}"
   }
   ensure_pool "${RBD_POOL_NAME}" "${RBD_POOL_CHUNK_SIZE}" "${RBD_POOL_APP_NAME}"
diff --git a/releasenotes/notes/cinder.yaml b/releasenotes/notes/cinder.yaml
index 1df52d5bbb..0a20ac69d2 100644
--- a/releasenotes/notes/cinder.yaml
+++ b/releasenotes/notes/cinder.yaml
@@ -56,4 +56,5 @@ cinder:
   - 0.3.4 Fix Helm hooks for storage bootstrap jobs
   - 0.3.5 Add Nova endpoint details to support online volume resize
   - 0.3.6 Fix ceph keyring placement for uppercased backends
+  - 0.3.7 Allow Ceph pools to use 1x replication
 ...
diff --git a/releasenotes/notes/glance.yaml b/releasenotes/notes/glance.yaml
index 6998bff3ab..4361a45442 100644
--- a/releasenotes/notes/glance.yaml
+++ b/releasenotes/notes/glance.yaml
@@ -35,4 +35,5 @@ glance:
   - 0.3.12 Add support for using Cinder as backend
   - 0.4.0 Remove support for Train and Ussuri
   - 0.4.1 Remove default policy rules
+  - 0.4.2 Allow Ceph pools to use 1x replication
 ...
diff --git a/tools/deployment/component/ceph/ceph-ns-activate.sh b/tools/deployment/component/ceph/ceph-ns-activate.sh
index 09640b612b..9574d4f0fd 100755
--- a/tools/deployment/component/ceph/ceph-ns-activate.sh
+++ b/tools/deployment/component/ceph/ceph-ns-activate.sh
@@ -41,6 +41,7 @@ conf:
   ceph:
     global:
       mon_host: ceph-mon-discovery.ceph.svc.cluster.local:6789
+      mon_allow_pool_size_one: true
 EOF
 helm upgrade --install ceph-openstack-config ${HELM_CHART_ROOT_PATH}/ceph-provisioners \
   --namespace=openstack \
diff --git a/tools/deployment/component/ceph/ceph.sh b/tools/deployment/component/ceph/ceph.sh
index 0f8f8a008e..face952145 100755
--- a/tools/deployment/component/ceph/ceph.sh
+++ b/tools/deployment/component/ceph/ceph.sh
@@ -67,6 +67,7 @@ conf:
     global:
       fsid: ${CEPH_FS_ID}
       mon_addr: :6789
+      mon_allow_pool_size_one: true
       osd_pool_default_size: 1
     osd:
       osd_crush_chooseleaf_type: 0
diff --git a/tools/deployment/multinode/030-ceph.sh b/tools/deployment/multinode/030-ceph.sh
index be5d5cff48..54d9f1c30e 100755
--- a/tools/deployment/multinode/030-ceph.sh
+++ b/tools/deployment/multinode/030-ceph.sh
@@ -48,6 +48,7 @@ conf:
   ceph:
     global:
       fsid: ${CEPH_FS_ID}
+      mon_allow_pool_size_one: true
   pool:
     crush:
       tunables: ${CRUSH_TUNABLES}