Extend container prep to include default network interface

This patch implements the preparation commands from the
lxc-container-create role as this preparation is required
to be done for all containers and is not unique for each
container.

Change-Id: Ia8c0bb759b5df29f1b3a5e11230040ffc6e97362

vars/redhat-7.yml

@@ -54,6 +54,15 @@ lxc_cache_map:
     /usr/bin/rpm -ivh /tmp/epel-release-latest-7.noarch.rpm || true
     yum clean all
     mkdir -p /var/backup
+    if [ -f  "/usr/lib/systemd/system/poweroff.target" ];then
+      ln -sf /usr/lib/systemd/system/poweroff.target /etc/systemd/system/sigpwr.target || true
+    fi
+    ln -s /dev/null /etc/systemd/system/systemd-udevd.service || true
+    ln -s /dev/null /etc/systemd/system/systemd-udevd-control.socket || true
+    ln -s /dev/null /etc/systemd/system/systemd-udevd-kernel.socket || true
+    ln -s /dev/null /etc/systemd/system/proc-sys-fs-binfmt_misc.automount || true
+    echo -e '{{ lxc_container_default_interfaces }}' | tee /etc/sysconfig/network-scripts/ifcfg-eth0
+    chage -I -1 -d -1 -m 0 -M 99999 -E -1 root
 
 lxc_cache_packages:
   - ca-certificates
@@ -70,3 +79,10 @@ pip_install_options: >
 lxc_cached_network_interfaces:
   - src: "lxc-net-ifcfg-bridge.cfg.j2"
     dest: "/etc/sysconfig/network-scripts/ifcfg-lxcbr0"
+
+lxc_container_default_interfaces: |
+  DEVICE=eth0
+  BOOTPROTO=dhcp
+  ONBOOT=yes
+  NM_CONTROLLED=no
+  TYPE=Ethernet

vars/ubuntu-14.04.yml

@@ -61,6 +61,16 @@ lxc_cache_map:
     userdel --force --remove ubuntu || true
     apt-get clean
     mkdir -p /var/backup
+    if [ -f  "/usr/lib/systemd/system/poweroff.target" ];then
+      ln -sf /usr/lib/systemd/system/poweroff.target /etc/systemd/system/sigpwr.target || true
+    fi
+    ln -s /dev/null /etc/systemd/system/systemd-udevd.service || true
+    ln -s /dev/null /etc/systemd/system/systemd-udevd-control.socket || true
+    ln -s /dev/null /etc/systemd/system/systemd-udevd-kernel.socket || true
+    ln -s /dev/null /etc/systemd/system/proc-sys-fs-binfmt_misc.automount || true
+    echo -e '{{ lxc_container_default_interfaces }}' | tee /etc/network/interfaces
+    mkdir -p /etc/network/interfaces.d
+    chage -I -1 -d -1 -m 0 -M 99999 -E -1 root
 
 # This forces any modified configurations to remain, and any unmodified configs to be replaced
 # ref: http://serverfault.com/questions/259226/automatically-keep-current-version-of-config-files-when-apt-get-install
@@ -124,4 +134,14 @@ lxc_cached_network_interfaces:
   - src: "lxc-net-bridge.cfg.j2"
     dest: "/etc/network/interfaces.d/lxc-net-bridge.cfg"
 
+lxc_container_default_interfaces: |
+  # The loopback network interface
+  auto lo
+  iface lo inet loopback
+  # LXC interface, this is ALWAYS assumed to be DHCP.
+  auto eth0
+  iface eth0 inet dhcp
+  # Load any additional configs
+  source /etc/network/interfaces.d/*.cfg
+
 lxc_default_release: "trusty-backports"

vars/ubuntu-16.04.yml

@@ -65,6 +65,16 @@ lxc_cache_map:
     userdel --force --remove ubuntu || true
     apt-get clean
     mkdir -p /var/backup
+    if [ -f  "/usr/lib/systemd/system/poweroff.target" ];then
+      ln -sf /usr/lib/systemd/system/poweroff.target /etc/systemd/system/sigpwr.target || true
+    fi
+    ln -s /dev/null /etc/systemd/system/systemd-udevd.service || true
+    ln -s /dev/null /etc/systemd/system/systemd-udevd-control.socket || true
+    ln -s /dev/null /etc/systemd/system/systemd-udevd-kernel.socket || true
+    ln -s /dev/null /etc/systemd/system/proc-sys-fs-binfmt_misc.automount || true
+    echo -e '{{ lxc_container_default_interfaces }}' | tee /etc/network/interfaces
+    mkdir -p /etc/network/interfaces.d
+    chage -I -1 -d -1 -m 0 -M 99999 -E -1 root
 
 # This forces any modified configurations to remain, and any unmodified configs to be replaced
 # ref: http://serverfault.com/questions/259226/automatically-keep-current-version-of-config-files-when-apt-get-install
@@ -80,3 +90,13 @@ lxc_cache_packages:
 lxc_cached_network_interfaces:
   - src: "lxc-net-bridge.cfg.j2"
     dest: "/etc/network/interfaces.d/lxc-net-bridge.cfg"
+
+lxc_container_default_interfaces: |
+  # The loopback network interface
+  auto lo
+  iface lo inet loopback
+  # LXC interface, this is ALWAYS assumed to be DHCP.
+  auto eth0
+  iface eth0 inet dhcp
+  # Load any additional configs
+  source /etc/network/interfaces.d/*.cfg