Remove references to unsupported operating systems

All references to Gentoo, SUSE, Debian stretch and Centos-7  are removed.
Conditional tasks, ternary operators and variables are simplified where possible
OS specific variables files are generalised where possible

Change-Id: I2defac928ff0081b262ba31bdb9981274f13b32b

handlers/main.yml

@@ -106,13 +106,6 @@
   changed_when: false
   listen: Enable hostnamed
 
-# NOTE(hwoarang) openSUSE randomly fails to start the service
-# with an error like the following one
-# sysctl-container.service: Failed at step CGROUP spawning /sbin/sysctl: No such device
-# Until this is fixed, we workaround it by simply retrying a few more times
-# before giving up
-# https://bugzilla.suse.com/show_bug.cgi?id=1055426
-# https://bugs.launchpad.net/openstack-ansible/+bug/1712741
 - name: Enable container sysctl service
   service:
     name: "sysctl-container"

meta/main.yml

@@ -22,16 +22,14 @@ galaxy_info:
   platforms:
     - name: Debian
       versions:
-        - stretch
+        - buster
     - name: Ubuntu
       versions:
         - bionic
+        - focal
     - name: EL
       versions:
         - 8
-    - name: opensuse
-      versions:
-        - 15.0
   categories:
     - cloud
     - lxc

tests/test-create-btrfs-dev.yml

@@ -56,5 +56,3 @@
   vars:
     btrfs_package:
       apt: "btrfs-progs"
-      yum: "btrfs-progs"
-      zypper: "btrfsprogs"

vars/gentoo.yml

@@ -1,40 +0,0 @@
----
-# Copyright 2018, Matthew Thode
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# no official systemd image is published, but machinectl seems to work
-lxc_container_backing_store: machinectl
-
-lxc_container_map:
-  distro: gentoo
-  arch: "{{ lxc_architecture_mapping.get( hostvars[physical_host]['ansible_facts']['architecture'] | lower ) }}"
-  release: 17.0-systemd
-
-lxc_container_default_config_list:
-  - "lxc.start.auto=1"
-  - "lxc.start.delay=15"
-  - "lxc.group=onboot"
-  - "lxc.group=openstack"
-  - "lxc.autodev=1"
-  - "lxc.pty.max=1024"
-  - "lxc.hook.autodev=/var/lib/lxc/{{ inventory_hostname }}/autodev"
-
-sysctl_path: "/usr/sbin"
-
-# shared binpkgs and distfiles
-_lxc_container_bind_mounts:
-  - host_directory: "/openstack/portage/packages"
-    container_directory: "/usr/portage/packages"
-  - host_directory: "/openstack/portage/distfiles"
-    container_directory: "/usr/portage/distfiles"

vars/suse.yml

@@ -1,31 +0,0 @@
----
-# Copyright 2016, Rackspace US, Inc.
-# Copyright 2017, SUSE LINUX GmbH.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-lxc_container_enable_resolved: false
-
-lxc_container_map:
-  distro: opensuse
-  arch: amd64
-  release: "{{ hostvars[physical_host]['ansible_facts']['distribution_version'] }}"
-
-lxc_container_default_config_list:
-  - "lxc.autodev=1"
-  - "lxc.group=onboot"
-  - "lxc.group=openstack"
-  - "lxc.hook.autodev=/var/lib/lxc/{{ inventory_hostname }}/autodev"
-  - "lxc.pty.max=1024"
-  - "lxc.start.auto=1"
-  - "lxc.start.delay=15"