Remove compare_host_packages strategy

Now that the undercloud is containerized, there will be very few host
packages to compare to, so there is a high risk that required package
updates will be skipped.

This is a strategy inherited from container-update.py that was
intended to avoid unnecessary calls to yum update, however we now have
a better approach using the repoquery, so host package comparison is
no longer required, and probably causing some of the instances of bug

Change-Id: Iab7b9d6377494001d904bb84b058ea293d73110c
Partial-Bug: #1786764

README.md

@@ -24,7 +24,6 @@ A role to allow modification to container images built for the TripleO project.
 | `target_image` | `''` | See modify image variables |
 | `update_repo` | `''` | If set, packages from this repo will be updated. Other repos will only be used for dependencies of these updates.|
 | `yum_repos_dir_path` | `None` | Optional path of directory to be used as `/etc/yum.repos.d` during the update |
-| `compare_host_packages` | `False` | If `True`, skip yum update when package versions match host package versions |
 | `container_build_tool` | `docker` | See modify image variables |
 
 ## Requirements ##

defaults/main.yml

@@ -1,3 +1,2 @@
-compare_host_packages: false
 update_repo: ''
 container_build_tool: 'docker'

files/compare-package-json.py

@@ -1,33 +0,0 @@
-#!/usr/bin/env python
-# Copyright 2018 Red Hat, 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.
-
-import json
-import subprocess
-import sys
-
-host_packages = json.load(sys.stdin)
-rpm_output = subprocess.check_output(
-    ['rpm', '-qa', '--qf', '%{NAME} %{VERSION}-%{RELEASE}\n']).split('\n')
-
-image_packages = dict(i.split(' ') for i in rpm_output if i)
-
-for pkg, version in image_packages.items():
-    host_version = host_packages.get(pkg)
-    if host_version and version != host_version:
-        print('%s-%s does not match host version %s' % (
-            pkg, version, host_version))
-        sys.exit(1)
-
-print('No package version differences found')

files/yum_update.sh

@@ -2,13 +2,6 @@
 
 set -eux
 
-if [ -f /tmp/host_packages.json ]; then
-    if /tmp/compare-package-json.py < /tmp/host_packages.json ; then
-        echo "Host package versions match, no update required"
-        exit
-    fi
-fi
-
 packages_for_update=
 if [ -n "$1" ] && command -v repoquery >/dev/null 2>&1; then
     installed=$(rpm -qa --qf "%{NAME}\n" | sort)

tasks/yum_update.yml

@@ -37,20 +37,6 @@
     chdir: "{{ modify_dir_path }}"
   when: yum_repos_dir_path is defined
 
-
-- name: Generate host package json file
-  block:
-
-    - command: |
-        rpm -qa --qf '"%{NAME}": "%{VERSION}-%{RELEASE}"\n'
-      register: rpm_query_output
-
-    - copy:
-        content: "{{ rpm_query_output.stdout | from_yaml | to_nice_json }}"
-        dest: "{{ modify_dir_path }}/host_packages.json"
-
-  when: compare_host_packages
-
 - name: Write Dockerfile to {{ modify_dir_path }}
   template:
     src: Dockerfile-yum.j2
@@ -62,12 +48,6 @@
     dest: "{{ modify_dir_path }}/yum_update.sh"
     mode: '0555'
 
-- name: Write compare-package-json.py
-  copy:
-    src: compare-package-json.py
-    dest: "{{ modify_dir_path }}/compare-package-json.py"
-    mode: '0555'
-
 - include_tasks: modify_image.yml
 
 - name: Clean modify directory

templates/Dockerfile-yum.j2

@@ -4,7 +4,6 @@ LABEL modified_append_tag={{ modified_append_tag }}
 USER root
 
 COPY yum_update.sh /tmp/
-COPY compare-package-json.py /tmp/
 
 {% if yum_repos_dir_path is defined %}
 RUN rm -rf /etc/yum.repos.d/
@@ -12,10 +11,6 @@ COPY yum.repos.d /etc/yum.repos.d
 COPY repos /
 {% endif %}
 
-{% if compare_host_packages %}
-COPY host_packages.json /tmp/
-{% endif %}
-
 RUN /tmp/yum_update.sh "{{ update_repo }}"
 
 USER "{{ original_user }}"