openstack-ansible-lxc_conta.../templates
Michael Gugino 4f1eb22919 Remove unwanted veth pair creation from lxc_container_create role
The lxc_container_create role creates containers specified via an inventory.
Multiple network interfaces can be added to a container during creation.  These
interfaces are provided by the task 'LXC host config for container networks' in
openstack-ansible-lxc_container_create/tasks/container_create.yml

The task 'LXC host config for container networks' utilizes a template file,
openstack-ansible-lxc_container_create/templates/container-interface.ini.j2
The configuration for a specified interface is created using this template.
The template currenlty offers the ability to modify the value 'lxc.network.type'
which defaults to type 'veth' if no value is supplied.

Supplying a value other than 'veth' is currently valid for this template.
However, the creation of a veth pair device is hard coded into the template
whether or not 'lxc.network.type' resolves to a value other than 'veth'

This creates two unwanted side effects:

First, a veth pair that is not being utilized by the corresponding container is
created.  We should not create a veth pair if it will not be used.

Secondly, if the value of the variable 'lxc.network.link' defined in the same
template file is something other than a bridge, the unwanted veth creation will
fail resulting in a container that will not start.

Additionally, if the corresponding veth pair is not created, then the template
openstack-ansible-lxc_container_create/templates/veth-cleanup.sh.j2 should be
modified to filter out interfaces that are not of type 'veth'.

This change implements interface type detection in the template files
veth-cleanup.sh.j2 and container-interface.ini.j2 to prevent creation of
unwanted veth interfaces and their associated cleanup.

Change-Id: I1c0a26d07e8de0ca862d21ea7b49e02ae447f83a
Closes-Bug: #1531935
2016-01-07 14:20:46 -05:00
..
autodev.j2 IRR for lxc_container_create 2015-11-03 08:00:45 -06:00
container-interface.ini.j2 Remove unwanted veth pair creation from lxc_container_create role 2016-01-07 14:20:46 -05:00
veth-cleanup.sh.j2 Remove unwanted veth pair creation from lxc_container_create role 2016-01-07 14:20:46 -05:00