Initial commit of system_updates

system_updates.py

@@ -0,0 +1,161 @@
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
+DOCUMENTATION = r'''
+---
+module: system_updates
+short_description: Collect system updates as ansible_facts
+description:
+    - Collects system updates from APT or Yum
+'''
+
+from ansible.module_utils.basic import AnsibleModule
+
+HAVE_PYTHON_APT = False
+HAVE_PYTHON_YUM = False
+
+try:
+    import apt
+    import apt_pkg
+    HAVE_PYTHON_APT = True
+except ImportError:
+    pass
+
+try:
+    import yum
+    from yum.logginglevels import __NO_LOGGING
+    HAVE_PYTHON_YUM = True
+except ImportError:
+    pass
+
+
+def get_updates_apt():
+    """Collect upgrades from APT"""
+
+    def is_critical_package(version):
+        for origin in version.origins:
+            if 'security' in origin.site.lower():
+                return True
+            if 'security' in origin.label.lower():
+                return True
+        return False
+
+    cache = apt.Cache(progress=None)
+    updated_packages = []
+
+    for pkg in cache:
+        for ver in pkg.versions:
+            if not ver.is_installed:
+                continue
+
+            candidate_ver = pkg.candidate
+            if pkg.is_upgradable:
+                updated_packages.append(dict(
+                    name=pkg.name,
+                    version=candidate_ver.version,
+                    arch=candidate_ver.architecture,
+                    category=candidate_ver.section,
+                    origin=candidate_ver.origins[0].origin,
+                    installed_version=ver.version,
+                    critical=is_critical_package(candidate_ver),
+                    description=ver.summary
+                ))
+    return updated_packages
+
+
+def get_updates_yum():
+    """Collect upgrades from Yum"""
+
+    def get_installed_version(package_name, arch=None):
+        search_results = yb.rpmdb.searchNevra(name=package_name, arch=arch)
+        return search_results[0].version if search_results else None
+
+    def is_critical_update(metadata):
+        for ref in metadata['references']:
+            if ref['type'].lower() in ('cve', 'security'):
+                return True
+            if 'CVE' in ref['title']:
+                return True
+        return False
+
+    # Make yum quiet
+    import logging
+    # grep -EIohr "getLogger\([^)]+\)" /usr/lib/python2.7/site-packages/yum/
+    loggers = ['yum', 'yum.Depsolve', 'yum.filelogging', 'yum.filelogging.RPMInstallCallback',
+               'yum.filelogging.YumBase', 'yum.plugin', 'yum.Repos', 'yum.ReposStorage', 'yum.update_md', 'yum.verbose',
+               'yum.verbose.Depsolve', 'yum.verbose.plugin', 'yum.ProcessTrasactionBaseCallback', 'yum.verbose.Repos',
+               'yum.verbose.update_md', 'yum.verbose.YumBase', 'yum.verbose.YumPlugins', 'yum.YumBase']
+
+    for name in loggers:
+        logger = logging.getLogger(name)
+        logger.setLevel(__NO_LOGGING)
+
+    yb = yum.YumBase()
+    yb.setCacheDir()
+
+    pkglist = yb.doPackageLists(pkgnarrow='updates')
+
+    umd = yum.update_md.UpdateMetadata()
+
+    repos = []
+    for update in pkglist.updates:
+        if update.repo not in repos:
+            repos.append(update.repo)
+            try:
+                umd.add(update.repo)
+            except yum.Errors.RepoMDError:
+                pass
+
+    updated_packages = []
+    for update in pkglist.updates:
+        critical_update = False
+        notice = umd.get_notice((update.name, update.ver, update.rel))
+        if notice:
+            metadata = notice.get_metadata()
+            critical_update = is_critical_update(metadata)
+
+        candidate = dict(
+            name=update.name,
+            version=update.version,
+            release=update.release,
+            epoch=update.epoch,
+            arch=update.arch,
+            installed_version=get_installed_version(update.name, update.arch),
+            critical=critical_update,
+            description=update.description
+        )
+        updated_packages.append(candidate)
+
+    return updated_packages
+
+
+def get_updates():
+    if HAVE_PYTHON_APT:
+        return get_updates_apt()
+    if HAVE_PYTHON_YUM:
+        return get_updates_yum()
+    return None
+
+
+def main():
+    module = AnsibleModule(argument_spec=dict(),
+                           supports_check_mode=True)
+
+    results = dict()
+    facts = dict()
+    updates = get_updates()
+
+    if updates is None:
+        results['skipped'] = True
+        results['msg'] = 'WARNING: Could not obtain updates'
+    else:
+        facts = updates
+
+    results['changed'] = False
+    results['ansible_facts'] = {'system_updates': facts }
+
+    module.exit_json(**results)
+
+
+if __name__ == '__main__':
+    main()