Add mtu parameter to OOM heat template

Change-Id: Ia478de1f3484fa9b32fe34cf0ec8a5defe118f2e
Issue-ID: INT-586
Signed-off-by: Gary Wu <gary.i.wu@huawei.com>
diff --git a/deployment/heat/onap-oom/k8s_vm_install.sh b/deployment/heat/onap-oom/k8s_vm_install.sh
index e5b843e..3e80f8e 100644
--- a/deployment/heat/onap-oom/k8s_vm_install.sh
+++ b/deployment/heat/onap-oom/k8s_vm_install.sh
@@ -16,14 +16,22 @@
 echo "__rancher_ip_addr__" > /opt/config/rancher_ip_addr.txt
 echo "__rancher_private_ip_addr__" > /opt/config/rancher_private_ip_addr.txt
 echo "__host_private_ip_addr__" > /opt/config/host_private_ip_addr.txt
+echo "__mtu__" > /opt/config/mtu.txt
 
 mkdir -p /etc/docker
 if [ ! -z "__docker_proxy__" ]; then
     cat > /etc/docker/daemon.json <<EOF
 {
+  "mtu": __mtu__,
   "insecure-registries" : ["__docker_proxy__"]
 }
 EOF
+else
+    cat > /etc/docker/daemon.json <<EOF
+{
+  "mtu": __mtu__
+}
+EOF
 fi
 if [ ! -z "__apt_proxy__" ]; then
     cat > /etc/apt/apt.conf.d/30proxy <<EOF