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, glance configs are installed in $SNAP_COMMON/etc/glance
which has a symlink at /etc/glance.

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

Change-Id: Ic763f9c8f34ab3096e8592520db00cdf81b0d9ef

bindep.txt

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

snap/snap-openstack.yaml

@@ -1,33 +1,36 @@
 setup:
   dirs:
-    - "{snap_common}/etc/glance.conf.d"
-    - "{snap_common}/etc/glance"
-    - "{snap_common}/log"
-    - "{snap_common}/lock"
-    - "{snap_common}/images"
+    - "{snap_common}/etc/glance/conf.d"
+    - "{snap_common}/lib/glance/images"
+    - "{snap_common}/log/glance"
+    - "{snap_common}/lock/glance"
+  symlinks:
+    "{snap_common}/etc/glance": /etc/glance
+    "{snap_common}/lib/glance": /var/lib/glance
+    "{snap_common}/log/glance": /var/log/glance
+    "{snap_common}/lock/glance": /var/lock/glance
   templates:
-    "glance-snap.conf.j2": "{snap_common}/etc/glance.conf.d/glance-snap.conf"
+    glance-snap.conf.j2: "{snap_common}/etc/glance/conf.d/glance-snap.conf"
+  copyfiles:
+    "{snap}/etc/glance": "{snap_common}/etc/glance"
 entry_points:
   glance-manage:
     binary: glance-manage
     config-files:
-      - "{snap}/etc/glance/glance.conf"
-      - "{snap_common}/etc/glance/glance.conf"
+      - "/etc/glance/glance.conf"
     config-dirs:
-      - "{snap_common}/etc/glance.conf.d"
+      - "/etc/glance/conf.d"
   glance-registry:
     binary: glance-registry
     config-files:
-      - "{snap}/etc/glance/glance-registry.conf"
-      - "{snap_common}/etc/glance/glance-registry.conf"
+      - "/etc/glance/glance-registry.conf"
     config-dirs:
-      - "{snap_common}/etc/glance.conf.d"
-    log-file: "{snap_common}/log/glance-registry.log"
+      - "/etc/glance/conf.d"
+    log-file: "/var/log/glance/glance-registry.log"
   glance-api:
     binary: glance-api
     config-files:
-      - "{snap}/etc/glance/glance-api.conf"
-      - "{snap_common}/etc/glance/glance-api.conf"
+      - "/etc/glance/glance-api.conf"
     config-dirs:
-      - "{snap_common}/etc/glance.conf.d"
-    log-file: "{snap_common}/log/glance-api.log"
+      - "/etc/glance/conf.d"
+    log-file: "/var/log/glance/glance-api.log"

snap/templates/glance-snap.conf.j2

@@ -1,11 +1,11 @@
 [DEFAULT]
 # Set state path to writable directory
-state_path = {{ snap_common }}
+state_path = /var/lib/glance
 
 [oslo_concurrency]
 # Oslo Concurrency lock path
-lock_path = {{ snap_common }}/lock
+lock_path = /var/lock/glance
 
 [glance_store]
 # Set default glance_store path to writable directory
-filesystem_store_datadir = {{ snap_common }}/images
+filesystem_store_datadir = /var/lib/glance/images

snapcraft.yaml

@@ -6,26 +6,21 @@ description: |
   to store, browse, share, distribute and manage bootable disk images,
   other data closely associated with initializing compute resources,
   and metadata definitions.
-confinement: strict
+confinement: classic
 grade: devel
 
+environment:
+  PATH: $PATH:$SNAP/bin/
+
 apps:
   api:
     command: snap-openstack glance-api
     daemon: simple
-    plugs:
-      - network
-      - network-bind
   registry:
     command: snap-openstack glance-registry
     daemon: simple
-    plugs:
-      - network
-      - network-bind
   manage:
     command: snap-openstack glance-manage
-    plugs:
-      - network
     aliases:
       - glance-manage
 
@@ -46,21 +41,16 @@ parts:
       - 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:
-      - glance
+    after: [glance]
     plugin: dump
     source: snap
   # TODO: replace below with scriplets once implemented in snapcraft
   config:
-    after:
-      - glance
+    after: [glance]
     plugin: dump
     source: http://tarballs.openstack.org/glance/glance-master.tar.gz
     organize:

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