From 7844ca815c0593b0ec5b98102af4d2125c1f395f Mon Sep 17 00:00:00 2001
From: Peter Palfrader <peter@palfrader.org>
Date: Tue, 31 Jul 2018 10:19:37 +0200
Subject: [PATCH 1/1] Make sure nodeinfo['misc']['v[46]addrs'] always exists,
 possibly empty.

---
 modules/ferm/manifests/init.pp                            | 8 +++-----
 .../puppetmaster/lib/puppet/parser/functions/nodeinfo.rb  | 4 ++++
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/modules/ferm/manifests/init.pp b/modules/ferm/manifests/init.pp
index 527881682..c1e3c528f 100644
--- a/modules/ferm/manifests/init.pp
+++ b/modules/ferm/manifests/init.pp
@@ -34,11 +34,9 @@ class ferm {
 
 	munin::check { $munin_ips: script => 'ip_', }
 
-	if getfromhash($site::nodeinfo, 'misc', 'v6addrs') {
-		$munin6_ips = getfromhash($site::nodeinfo, 'misc', 'v6addrs')
-			.map |$addr| { "ip_${addr}" }
-		munin::ipv6check { $munin6_ips: }
-	}
+	$munin6_ips = getfromhash($site::nodeinfo, 'misc', 'v6addrs')
+		.map |$addr| { "ip_${addr}" }
+	munin::ipv6check { $munin6_ips: }
 
 	# get rid of old stuff
 	$munin6_ip6s = split(regsubst($::v6ips, '([^,]+)', 'ip6_\1', 'G'), ',')
diff --git a/modules/puppetmaster/lib/puppet/parser/functions/nodeinfo.rb b/modules/puppetmaster/lib/puppet/parser/functions/nodeinfo.rb
index 4927002df..812ff0c9c 100644
--- a/modules/puppetmaster/lib/puppet/parser/functions/nodeinfo.rb
+++ b/modules/puppetmaster/lib/puppet/parser/functions/nodeinfo.rb
@@ -33,11 +33,15 @@ module Puppet::Parser::Functions
           # find out if we are behind nat
           intersection = nodeinfo['misc']['v4addrs'] & nodeinfo['ldap']['ipHostNumber']
           nodeinfo['misc']['natted'] = intersection.empty?
+        else
+          nodeinfo['misc']['v4addrs'] = []
         end
 
         v6ips = lookupvar('::v6ips')
         if v6ips and v6ips.to_s != "" and v6ips.to_s != 'undefined'
           nodeinfo['misc']['v6addrs'] = v6ips.split(',')
+        else
+          nodeinfo['misc']['v6addrs'] = []
         end
       end
 
-- 
2.20.1