Configurable etcd quota backend bytes

cluster/common.sh

@@ -835,6 +835,11 @@ EOF
 ETCD_COMPACTION_INTERVAL_SEC: $(yaml-quote ${ETCD_COMPACTION_INTERVAL_SEC})
 EOF
     fi
+    if [ -n "${ETCD_QUOTA_BACKEND_BYTES:-}" ]; then
+      cat >>$file <<EOF
+ETCD_QUOTA_BACKEND_BYTES: $(yaml-quote ${ETCD_QUOTA_BACKEND_BYTES})
+EOF
+    fi
     if [ -n "${APISERVER_TEST_ARGS:-}" ]; then
       cat >>$file <<EOF
 APISERVER_TEST_ARGS: $(yaml-quote ${APISERVER_TEST_ARGS})

cluster/gce/gci/configure-helper.sh

@@ -1393,7 +1393,7 @@ function prepare-etcd-manifest {
     sed -i -e "s@{{ *pillar\.get('storage_backend', '\(.*\)') *}}@\1@g" "${temp_file}"
   fi
   if [[ "${STORAGE_BACKEND:-${default_storage_backend}}" == "etcd3" ]]; then
-    sed -i -e "s@{{ *quota_bytes *}}@--quota-backend-bytes=4294967296@g" "${temp_file}"
+    sed -i -e "s@{{ *quota_bytes *}}@--quota-backend-bytes=${ETCD_QUOTA_BACKEND_BYTES:-4294967296}@g" "${temp_file}"
   else
     sed -i -e "s@{{ *quota_bytes *}}@@g" "${temp_file}"
   fi