begin fix up of ifconfig provider on 1804

Signed-off-by: Thom May <thom@chef.io>

2 files changed, 4 insertions, 1 deletions

diff --git a/lib/chef/provider/ifconfig/debian.rb b/lib/chef/provider/ifconfig/debian.rb
index 369c222b7a..4560c0c477 100644
--- a/lib/chef/provider/ifconfig/debian.rb
+++ b/lib/chef/provider/ifconfig/debian.rb
@@ -62,6 +62,8 @@ iface <%= new_resource.device %> inet static
         protected
 
         def enforce_interfaces_dot_d_sanity
+          # on ubuntu 18.04 there's no interfaces file and it uses interfaces.d by default
+          return if ::File.directory?(INTERFACES_DOT_D_DIR) && !::File.exist?(INTERFACES_FILE)
           # create /etc/network/interfaces.d via dir resource (to get reporting, etc)
           dir = Chef::Resource::Directory.new(INTERFACES_DOT_D_DIR, run_context)
           dir.run_action(:create)
diff --git a/spec/functional/resource/ifconfig_spec.rb b/spec/functional/resource/ifconfig_spec.rb
index fbb8995d52..f32ed069b5 100644
--- a/spec/functional/resource/ifconfig_spec.rb
+++ b/spec/functional/resource/ifconfig_spec.rb
@@ -16,6 +16,7 @@
 # limitations under the License.
 #
 
+require "spec_helper"
 require "functional/resource/base"
 require "chef/mixin/shell_out"
 
@@ -52,7 +53,7 @@ describe Chef::Resource::Ifconfig, :requires_root, :skip_travis, :external => in
   end
 
   def fetch_first_interface_name
-    shell_out("ifconfig | grep Ethernet | head -1 | cut -d' ' -f1").stdout.strip
+    shell_out("ip link list |grep UP|grep -vi loop|head -1|cut -d':' -f 2").stdout.strip
   end
 
   # **Caution: any updates to core interfaces can be risky.