@@ -27,6 +27,10 @@ set +o xtrace

 ETCD_DATA_DIR="$DATA_DIR/etcd"

 ETCD_SYSTEMD_SERVICE="devstack@etcd.service"

 ETCD_BIN_DIR="$DEST/bin"

+# Option below will mount ETCD_DATA_DIR as ramdisk, which is useful to run

+# etcd-heavy services in the gate VM's, e.g. Kubernetes.

+ETCD_USE_RAMDISK=$(trueorfalse False ETCD_USE_RAMDISK)

+ETCD_RAMDISK_MB=${ETCD_RAMDISK_MB:-512}

 if is_ubuntu ; then

     UBUNTU_RELEASE_BASE_NUM=`lsb_release -r | awk '{print $2}' | cut -d '.' -f 1`

@@ -89,6 +93,9 @@ function cleanup_etcd3 {

     $SYSTEMCTL daemon-reload

+    if [[ "$ETCD_USE_RAMDISK" == "True" ]]; then

+        sudo umount $ETCD_DATA_DIR

+    fi

     sudo rm -rf $ETCD_DATA_DIR

 }

@@ -98,6 +105,9 @@ function install_etcd3 {

     # Create the necessary directories

     sudo mkdir -p $ETCD_BIN_DIR

     sudo mkdir -p $ETCD_DATA_DIR

+    if [[ "$ETCD_USE_RAMDISK" == "True" ]]; then

+        sudo mount -t tmpfs -o nodev,nosuid,size=${ETCD_RAMDISK_MB}M tmpfs $ETCD_DATA_DIR

+    fi

     # Download and cache the etcd tgz for subsequent use

     local etcd_file