Zuul versions of sudo grep checks

Old legacy jobs will continue to want tocheck that the test user isn't
using sudo if sudo has been disabled. Add a zuul version of the checker
script and update the sudo rules to allow the zuul user to run it

Change-Id: I3f941fb57e4574dcca04442b97a70e6acbc395e9
Co-Authored-By: Clark Boylan <clark.boylan@gmail.com>

playbooks/legacy/pre.yaml

@@ -24,3 +24,25 @@
       with_items:
         - id_rsa
         - id_rsa.pub
+
+    - name: Add sudoers role for zuul-sudo-grep.sh
+      copy:
+        dest: /etc/sudoers.d/zuul-sudo-grep
+        content: "zuul ALL = NOPASSWD:/usr/local/jenkins/slave_scripts/zuul-sudo-grep.sh"
+        mode: 0440
+        validate: "/usr/sbin/visudo -cf %s"
+      become: true
+
+    - name: Copy zuul-sudo-grep.sh to
+      copy:
+        dest: /usr/local/jenkins/slave_scripts/zuul-sudo-grep.sh
+        src: zuul-sudo-grep.sh
+        mode: 0755
+      become: true
+
+    - name: Modify run-tox.sh to use zuul-sudo-grep.sh
+      lineinfile:
+        path: /usr/local/jenkins/slave_scripts/run-tox.sh
+        regexp: '^    sudo .script_path/jenkins-sudo-grep.sh post'
+        line: '    sudo $script_path/zuul-sudo-grep.sh post'
+      become: true

playbooks/legacy/zuul-sudo-grep.sh

@@ -0,0 +1,61 @@
+#!/bin/bash
+
+# Copyright 2012 Hewlett-Packard Development Company, L.P.
+# Copyright 2013 OpenStack Foundation
+#
+# 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.
+
+# Find out if zuul has attempted to run any sudo commands by checking
+# the auth.log or secure log or messages files before and after a test run.
+
+PATTERN="sudo.*zuul.*:.*\(incorrect password attempts\|command not allowed\)"
+if [ -f /var/log/auth.log ]; then
+    OLDLOGFILE=/var/log/auth.log.1
+    LOGFILE=/var/log/auth.log
+elif [ -f /var/log/secure ]; then
+    OLDLOGFILE=$( ls /var/log/secure-* | sort | tail -n1 )
+    LOGFILE=/var/log/secure
+elif [ -f /var/log/messages ]; then
+    OLDLOGFILE=$( ls /var/log/messages-* | sort | tail -n1 )
+    LOGFILE=/var/log/messages
+else
+    echo "*** Could not find auth.log/secure/messages log for sudo tracing"
+    exit 1
+fi
+
+case "$1" in
+    pre)
+        rm -fr /tmp/zuul-sudo-log
+        mkdir /tmp/zuul-sudo-log
+        if [ -f "$OLDLOGFILE" ]; then
+            stat -c %Y $OLDLOGFILE > /tmp/zuul-sudo-log/mtime-pre
+        else
+            echo "0" > /tmp/zuul-sudo-log/mtime-pre
+        fi
+        grep -h "$PATTERN" $LOGFILE > /tmp/zuul-sudo-log/pre
+        exit 0
+        ;;
+    post)
+        if [ -f "$OLDLOGFILE" ]; then
+            stat -c %Y $OLDLOGFILE > /tmp/zuul-sudo-log/mtime-post
+        else
+            echo "0" > /tmp/zuul-sudo-log/mtime-post
+        fi
+        if ! diff /tmp/zuul-sudo-log/mtime-pre /tmp/zuul-sudo-log/mtime-post > /dev/null; then
+            echo "diff"
+            grep -h "$PATTERN" $OLDLOGFILE > /tmp/zuul-sudo-log/post
+        fi
+        grep -h "$PATTERN" $LOGFILE >> /tmp/zuul-sudo-log/post
+        diff /tmp/zuul-sudo-log/pre /tmp/zuul-sudo-log/post
+        ;;
+esac