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: I79f68c467d48b9b50143fd3a11e176f91804e805

defaults/main.yml

@@ -169,7 +169,7 @@ lxc_cache_prep_post_commands: '## post command skipped ##'
 # User defined variable pointing to a specific variable file used when setting
 # up the base container image. Deployers can use the provided container variable
 # files by simply inputting the file name
-# "{{ ansible_distribution }}-{{ ansible_distribution_version }}-container.yml"
+# "{{ ansible_facts['distribution'] }}-{{ ansible_facts['distribution_version'] }}-container.yml"
 # or by providing the full path to a local file containing all of the variables
 # needed to prepare a container. built-in supported values are:
 #   [redhat-7.yml, ubuntu-16.04.yml, ubuntu-18.04.yml]

meta/main.yml

@@ -20,10 +20,13 @@ galaxy_info:
   license: Apache2
   min_ansible_version: 2.4
   platforms:
+    - name: Debian
+      versions:
+        - buster
     - name: Ubuntu
       versions:
-        - xenial
         - bionic
+        - focal
     - name: EL
       versions:
         - 8

tasks/lxc_cache_preparation.yml

@@ -96,7 +96,7 @@
     mode: "0440"
     src: sudoers.j2
   when:
-    - ansible_facts['pkg_mgr'] == 'yum'
+    - ansible_facts['pkg_mgr'] == 'dnf'
 
 - name: Adjust sshd configuration in container
   lineinfile:

tests/test.yml

@@ -118,6 +118,6 @@
           - interface_file is search('.*255.255.255.0.*')
           - sysctl_conf is search('fs.inotify.max_user_instances.*')
           - "lxc_bridge_file.stat.exists"
-          - lxcbr0_facts.ansible_facts.ansible_lxcbr0.ipv4.address is match('10.100.100.1')
+          - ansible_facts['lxcbr0']['ipv4']['address'] is match('10.100.100.1')
           - extra_host_package_state is not changed
           - extra_cache_package_find.matched > 0

vars/gentoo-host.yml

@@ -1,50 +0,0 @@
----
-# Copyright 2016, Rackspace US, Inc.
-#
-# 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.
-
-# Required packages.
-lxc_hosts_distro_packages:
-  - net-misc/aria2
-  - net-misc/bridge-utils
-  - sys-fs/btrfs-progs
-  - app-admin/cgmanager
-  - sys-apps/dbus
-  - dev-util/debootstrap
-  - net-dns/dnsmasq
-  - dev-vcs/git
-  - sys-libs/libseccomp
-  - net-firewall/iptables
-  - sys-apps/irqbalance
-  - app-emulation/lxc
-  - app-emulation/lxc-templates
-  - dev-python/lxc-python2
-  - dev-python/python3-lxc
-  - app-arch/xz-utils
-  - sys-apps/ethtool
-  - sys-process/procps
-
-# Package to remove from the host
-lxc_hosts_remove_distro_packages:
-  - dnsmasq
-
-lxc_xz_bin: xz
-
-system_config_dir: "/etc/conf.d"
-systemd_utils_prefix: "/lib/systemd"
-
-lxc_cached_network_interfaces:
-  - src: "lxc-networkd-bridge.network.j2"
-    dest: "/etc/systemd/network/{{ lxc_net_bridge }}.network"
-  - src: "lxc-networkd-bridge.netdev.j2"
-    dest: "/etc/systemd/network/{{ lxc_net_bridge }}.netdev"

vars/redhat-host.yml

@@ -43,7 +43,7 @@ lxc_xz_bin: xz
 lxc_cached_network_interfaces:
   - src: "lxc-net-redhat-bridge.cfg.j2"
     dest: "/etc/sysconfig/network-scripts/ifcfg-{{ lxc_net_bridge }}"
-  - src: "lxc-net-suseredhat-postdown.cfg.j2"
+  - src: "lxc-net-redhat-postdown.cfg.j2"
     dest: "/etc/sysconfig/network-scripts/ifdown-post-{{ lxc_net_bridge }}"
     mode: "0755"
     interface: "${DEVICE}"