Add option for debug logging for containers

This adds a patch to allow debug logging to be enabled when
creating containers.

This is useful for troubleshooting why containers fail to
build/start.

Change-Id: I3b4a0be8cff6b5c3397fdfe2a087522e3ee5f32b

defaults/main.yml

@@ -13,6 +13,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+## Verbosity Options
+debug: False
+
 lxc_container_config: /etc/lxc/lxc-openstack.conf
 
 # Mappings from Ansible reported architecture to distro release architecture
@@ -23,6 +26,7 @@ lxc_architecture_mapping:
 # lxc container rootfs directory and cache path
 lxc_container_directory: "/var/lib/lxc"
 lxc_container_cache_path: "/var/cache/lxc"
+lxc_container_log_path: "/var/log/lxc"
 lxc_container_rootfs_directory: "{{ lxc_container_directory }}/{{ container_name }}/rootfs"
 
 # container_fs.* is only used with building on an LVM backend

tasks/container_create.yml

@@ -58,6 +58,7 @@
   lxc_container:
     name: "{{ inventory_hostname }}"
     container_log: "true"
+    container_log_level: "{{ (debug | bool) | ternary('DEBUG', 'INFO') }}"
     config: "{{ lxc_container_config }}"
     template: "{{ lxc_container_template }}"
     state: started
@@ -100,6 +101,8 @@
     --name {{ lxc_container_map.distro }}-{{ lxc_container_map.release }}-{{ lxc_container_map.arch }}
     --newname {{ inventory_hostname }}
     -L {{ properties.container_fs_size | default(lxc_container_fs_size) }}
+    --logfile {{ lxc_container_log_path }}/lxc-{{ inventory_hostname }}.log
+    --logpriority {{ (debug | bool) | ternary('DEBUG', 'INFO') }}
   delegate_to: "{{ physical_host }}"
   when:
     - lxc_container_backing_store == "overlayfs"