Merge pull request #3801 from open-craft/mtyaka/check-for-eth0

Determine default network interface name instead of hardcoding to eth0.

playbooks/roles/aws/tasks/main.yml

@@ -31,23 +31,17 @@
     - deploy
 
 - name: Set the MTU to 1500 temporarily
-  shell: /sbin/ifconfig eth0 mtu 1500 up
+  shell: "/sbin/ifconfig {{ ansible_default_ipv4.interface }} mtu 1500 up"
   when: ansible_distribution in common_debian_variants
 
-- name: Check for eth0.cfg
-  stat:
-    path: /etc/network/interfaces.d/eth0.cfg
-  register: eth0_cfg
+- name: Set the MTU to 1500 permanently
+  template:
+    dest: /etc/network/if-up.d/mtu
+    src: mtu.j2
+    mode: 0755
+    owner: root
+    group: root
   when: ansible_distribution in common_debian_variants
-
-- name: Set the MTU to 1500 inside eth0.cfg file
-  lineinfile:
-    dest: /etc/network/interfaces.d/eth0.cfg
-    regexp: "^post-up /sbin/ifconfig eth0 mtu 1500"
-    line: "post-up /sbin/ifconfig eth0 mtu 1500"
-    insertafter: "^iface"
-  when: ansible_distribution in common_debian_variants and eth0_cfg.stat.exists
-
 #
 # End dealing with Jumbo frames issue in mixed MTU deployements in AWS
 #

playbooks/roles/aws/templates/mtu.j2

+#!/bin/sh
+ifconfig {{ ansible_default_ipv4.interface }} mtu 1500

playbooks/roles/vhost/templates/etc/dhcp/dhclient.conf.j2

@@ -56,7 +56,7 @@ request subnet-mask, broadcast-address, time-offset, routers,
 #  expire 2 2000/1/12 00:00:01;
 #}
 
-interface "eth0" {
+interface "{{ ansible_default_ipv4.interface }}" {
     prepend domain-search {% for search in COMMON_DHCLIENT_DNS_SEARCH -%}"{{ search }}"{%- if not loop.last -%},{%- endif -%}
 {%- endfor -%};
 }