Install iptables-persistent if it doesn't exist

Change-Id: I7535e7ff3b74236cd3c7e752244252481582d557
Signed-off-by: David Garcia <david.garcia@canonical.com>

diff --git a/n2vc/provisioner.py b/n2vc/provisioner.py
index b170b2e..fbb16ca 100644 (file)
--- a/n2vc/provisioner.py
+++ b/n2vc/provisioner.py
@@ -72,8 +72,8 @@ fi
 
 IPTABLES_SCRIPT = """#!/bin/bash
 set -e
-apt-get update
-DEBIAN_FRONTEND=noninteractive apt-get install -yqq iptables-persistent
+[ -v `which netfilter-persistent` ] && apt update \
+    && DEBIAN_FRONTEND=noninteractive apt-get install -yqq iptables-persistent
 iptables -t nat -A OUTPUT -p tcp -d {} -j DNAT --to-destination {}
 netfilter-persistent save
 """