Switch to classic confinement

Classic confinement allows the snap to behave like a traditionally
packaged application with full access to the system, and enables the
use of traditional directories such as /etc and /var/log.

We will continue to store all of the snap's files in $SNAP* directories.
This enables the snap to cleanup after itself if it is removed. However,
traditional directory locations are symlinked to their corresponding
$SNAP* directories.

For example, nova configs are installed in $SNAP_COMMON/etc/nova
which has a symlink at /etc/nova.

The nova apps then use the traditional directories when running
commands and services.

Change-Id: Ie21c66007a37b90ac3bca042505bad332fa76543

bindep.txt

@@ -1 +1,2 @@
 snapcraft [platform:dpkg]
+snapd [platform:dpkg]

snap/snap-openstack.yaml

@@ -1,49 +1,51 @@
 setup:
   dirs:
-    - "{snap_common}/etc/nova.conf.d"
-    - "{snap_common}/etc/nova"
-    - "{snap_common}/log"
-    - "{snap_common}/lock"
-    - "{snap_common}/run"
+    - "{snap_common}/etc/nova/conf.d"
+    - "{snap_common}/lib/nova"
+    - "{snap_common}/log/nova"
+    - "{snap_common}/lock/nova"
+    - "{snap_common}/run/nova"
+  symlinks:
+    "{snap_common}/etc/nova": /etc/nova
+    "{snap_common}/lib/nova": /var/lib/nova
+    "{snap_common}/log/nova": /var/log/nova
+    "{snap_common}/lock/nova": /var/lock/nova
   templates:
-    "nova-snap.conf.j2": "{snap_common}/etc/nova.conf.d/nova-snap.conf"
+    nova-snap.conf.j2: "{snap_common}/etc/nova/conf.d/nova-snap.conf"
+  copyfiles:
+    "{snap}/etc/nova": "{snap_common}/etc/nova"
 entry_points:
   nova-api-os-compute:
     binary: nova-api-os-compute
     config-files:
-      - "{snap}/etc/nova/nova.conf"
-      - "{snap_common}/etc/nova/nova.conf"
+      - "/etc/nova/nova.conf"
     config-dirs:
-      - "{snap_common}/etc/nova.conf.d"
-    log-file: "{snap_common}/log/nova-api-os-compute.log"
+      - "/etc/nova/conf.d"
+    log-file: "/var/log/nova/nova-api-os-compute.log"
   nova-conductor:
     binary: nova-conductor
     config-files:
-      - "{snap}/etc/nova/nova.conf"
-      - "{snap_common}/etc/nova/nova.conf"
+      - "/etc/nova/nova.conf"
     config-dirs:
-      - "{snap_common}/etc/nova.conf.d"
-    log-file: "{snap_common}/log/nova-conductor.log"
+      - "/etc/nova/conf.d"
+    log-file: "/var/log/nova/nova-conductor.log"
   nova-scheduler:
     binary: nova-scheduler
     config-files:
-      - "{snap}/etc/nova/nova.conf"
-      - "{snap_common}/etc/nova/nova.conf"
+      - "/etc/nova/nova.conf"
     config-dirs:
-      - "{snap_common}/etc/nova.conf.d"
-    log-file: "{snap_common}/log/nova-scheduler.log"
+      - "/etc/nova/conf.d"
+    log-file: "/var/log/nova/nova-scheduler.log"
   nova-consoleauth:
     binary: nova-consoleauth
     config-files:
-      - "{snap}/etc/nova/nova.conf"
-      - "{snap_common}/etc/nova/nova.conf"
+      - "/etc/nova/nova.conf"
     config-dirs:
-      - "{snap_common}/etc/nova.conf.d"
-    log-file: "{snap_common}/log/nova-consoleauth.log"
+      - "/etc/nova/conf.d"
+    log-file: "/var/log/nova/nova-consoleauth.log"
   nova-manage:
     binary: nova-manage
     config-files:
-      - "{snap}/etc/nova/nova.conf"
-      - "{snap_common}/etc/nova/nova.conf"
+      - "/etc/nova/nova.conf"
     config-dirs:
-      - "{snap_common}/etc/nova.conf.d"
+      - "/etc/nova/conf.d"

snap/templates/nova-snap.conf.j2

@@ -1,7 +1,7 @@
 [DEFAULT]
 # Set state path to writable directory
-state_path = {{ snap_common }}
+state_path = /var/lib/nova
 
 [oslo_concurrency]
 # Oslo Concurrency lock path
-lock_path = {{ snap_common }}/lock
+lock_path = /var/lock/nova

snapcraft.yaml

@@ -14,38 +14,27 @@ description: |
   .
   This snap provides the Nova controller component of an OpenStack
   deployment.
-confinement: strict
+confinement: classic
 grade: devel
 
+environment:
+  PATH: $PATH:$SNAP/bin/
+
 apps:
   api:
     command: snap-openstack nova-api-os-compute
     daemon: simple
-    plugs:
-      - network
-      - network-bind
   conductor:
     command: snap-openstack nova-conductor
     daemon: simple
-    plugs:
-      - network
-      - network-bind
   scheduler:
     command: snap-openstack nova-scheduler
     daemon: simple
-    plugs:
-      - network
-      - network-bind
   consoleauth:
     command: snap-openstack nova-consoleauth
     daemon: simple
-    plugs:
-      - network
-      - network-bind
   manage:
     command: snap-openstack nova-manage
-    plugs:
-      - network
     aliases:
       - nova-manage
 parts:
@@ -56,23 +45,18 @@ parts:
     python-packages:
       - pymysql
       - python-memcached
-      - git+https://github.com/openstack-snaps/snap.openstack#egg=snap.openstack
+      - git+https://github.com/openstack/snap.openstack#egg=snap.openstack
     constraints: https://raw.githubusercontent.com/openstack/requirements/master/upper-constraints.txt
     build-packages:
+      - gcc
       - libffi-dev
       - libssl-dev
-      - libxml2-dev
-      - libxslt1-dev
-      - pkg-config
-      - gcc
   templates:
-    after:
-      - nova
+    after: [nova]
     plugin: dump
     source: snap
   config:
-    after:
-      - nova
+    after: [nova]
     plugin: dump
     source: http://tarballs.openstack.org/nova/nova-master.tar.gz
     filesets:

tox.ini

@@ -6,9 +6,13 @@ skipsdist = True
 basepython = python3.5
 install_command = pip install {opts} {packages}
 passenv = HOME TERM
+whitelist_externals =
+    sudo
+    snapcraft
 
 [testenv:snap]
 deps = -r{toxinidir}/requirements.txt
 commands =
+    sudo snap install core
     snapcraft clean
     snapcraft snap