Support python3 in guest agent

Story: #2006455
Task: #36376
Change-Id: I62323ac1c1edfbf0378d0c89e156fdb3a879aa88

contrib/trove-guestagent

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 
 # Copyright 2011 OpenStack Foundation
 # All Rights Reserved.

integration/scripts/files/elements/ubuntu-guest/install.d/15-trove-dep

@@ -7,13 +7,9 @@ set -e
 set -o xtrace
 
 export DEBIAN_FRONTEND=noninteractive
-apt-get --allow-unauthenticated -y install python-dev libxml2-dev libxslt1-dev python-setuptools \
-    libffi-dev libssl-dev \
-    python-pip python-sqlalchemy python-lxml \
-    python-routes python-eventlet python-webob \
-    python-pastedeploy python-paste python-netaddr \
-    python-httplib2 python-iso8601 python-pexpect python-mysqldb python-migrate
-
+apt-get --allow-unauthenticated -y install \
+    libxml2-dev libxslt1-dev libffi-dev libssl-dev libyaml-dev \
+    python3 python3-dev python3-pip python3-sqlalchemy python3-setuptools
 
 # pick up the requirements file left for us by
 # extra-data.d/15-reddwarf-dep
@@ -25,8 +21,10 @@ if [ -f ${TMP_HOOKS_DIR}/upper-constraints.txt ]; then
     UPPER_CONSTRAINTS=" -c ${TMP_HOOKS_DIR}/upper-constraints.txt"
 fi
 
-pip2 install -q --upgrade -r ${TMP_HOOKS_DIR}/requirements.txt ${UPPER_CONSTRAINTS}
+pip3 install pip==9.0.3
+pip3 install wheel
+pip3 install --upgrade -r ${TMP_HOOKS_DIR}/requirements.txt ${UPPER_CONSTRAINTS}
 
 echo "diagnostic pip freeze output follows"
-pip2 freeze
+pip3 freeze
 echo "diagnostic pip freeze output above"

trove/guestagent/guest_log.py

@@ -294,7 +294,7 @@ class GuestLog(object):
             return True
 
     def _update_log_header_digest(self, log_file):
-        with open(log_file, 'r') as log:
+        with open(log_file, 'rb') as log:
             self._header_digest = hashlib.md5(log.readline()).hexdigest()
 
     def _get_headers(self):

trove/guestagent/pkg.py

@@ -22,7 +22,9 @@ import subprocess
 from tempfile import NamedTemporaryFile
 
 from oslo_log import log as logging
+from oslo_utils import encodeutils
 import pexpect
+import six
 
 from trove.common import exception
 from trove.common.exception import ProcessExecutionError
@@ -50,9 +52,10 @@ def getoutput(*cmd):
                                 stderr=subprocess.STDOUT)
     except OSError:
         # ignore errors like program not found
-        return b''
+        return six.text_type("")
+
     stdout = proc.communicate()[0]
-    return stdout
+    return encodeutils.safe_decode(stdout)
 
 
 class PkgAdminLockError(exception.TroveError):

trove/guestagent/strategies/replication/mysql_gtid.py

@@ -14,6 +14,7 @@
 #    under the License.
 #
 from oslo_log import log as logging
+from oslo_utils import encodeutils
 
 from trove.common import exception
 from trove.common.i18n import _
@@ -71,8 +72,8 @@ class MysqlGTIDReplication(mysql_base.MysqlReplicationBase):
         LOG.info("Reading last master GTID from %s", INFO_FILE)
         try:
             with open(INFO_FILE, 'rb') as f:
-                row = f.read().split('\t')
-                return row[2]
+                row = f.read().split(b'\t')
+                return encodeutils.safe_decode(row[2])
         except (IOError, IndexError) as ex:
             LOG.exception(ex)
             raise self.UnableToDetermineLastMasterGTID(