Merge lp:~1chb1n/charms/trusty/percona-cluster/liberty-prep into lp:~openstack-charmers-archive/charms/trusty/percona-cluster/next

[Ryan Beisner]

Sync charm-helpers for liberty cloud archive support; Also update makefile, update c-h sync yaml, update tests dir, update amulet test dependencies - to be consistent with other os-charms. Clean up old existing lint in unit tests.

[uosci-testing-bot (uosci-testing-bot)]

charm_unit_test #8088 percona-cluster-next for 1chb1n mp269210
    UNIT OK: passed

Build: http://10.245.162.77:8080/job/charm_unit_test/8088/

[uosci-testing-bot (uosci-testing-bot)]

charm_lint_check #8757 percona-cluster-next for 1chb1n mp269210
    LINT OK: passed

Build: http://10.245.162.77:8080/job/charm_lint_check/8757/

[uosci-testing-bot (uosci-testing-bot)]

charm_amulet_test #6034 percona-cluster-next for 1chb1n mp269210
    AMULET OK: passed

Build: http://10.245.162.77:8080/job/charm_amulet_test/6034/

[Liam Young (gnuoy)]

Approve

review: Approve

=== modified file 'Makefile'
--- Makefile	2015-07-22 11:17:09 +0000
+++ Makefile	2015-08-26 13:24:25 +0000
@@ -3,18 +3,17 @@
 export PYTHONPATH := hooks
 
 lint:
-	@flake8 --exclude hooks/charmhelpers hooks
+	@flake8 --exclude hooks/charmhelpers,tests/charmhelpers \
+        hooks unit_tests tests
 	@charm proof
 
-unit_test:
-	@$(PYTHON) /usr/bin/nosetests --nologcapture unit_tests
-
 test:
+	@# Bundletester expects unit tests here.
+	@$(PYTHON) /usr/bin/nosetests -v --nologcapture --with-coverage unit_tests
+
+functional_test:
 	@echo Starting amulet tests...
-	#NOTE(beisner): can remove -v after bug 1320357 is fixed
-	#   https://bugs.launchpad.net/amulet/+bug/1320357
 	@juju test -v -p AMULET_HTTP_PROXY,AMULET_OS_VIP --timeout 2700
-	#echo "Tests disables; http://pad.lv/1446169"
 
 bin/charm_helpers_sync.py:
 	@mkdir -p bin
@@ -22,8 +21,8 @@
         > bin/charm_helpers_sync.py
 
 sync: bin/charm_helpers_sync.py
-	@$(PYTHON) bin/charm_helpers_sync.py -c charm-helpers.yaml
+	@$(PYTHON) bin/charm_helpers_sync.py -c charm-helpers-hooks.yaml
 	@$(PYTHON) bin/charm_helpers_sync.py -c charm-helpers-tests.yaml
 
-publish: lint
+publish: lint test
 	bzr push lp:charms/trusty/percona-cluster

=== renamed file 'charm-helpers.yaml' => 'charm-helpers-hooks.yaml'
=== modified file 'hooks/charmhelpers/cli/__init__.py'
--- hooks/charmhelpers/cli/__init__.py	2015-08-03 14:52:57 +0000
+++ hooks/charmhelpers/cli/__init__.py	2015-08-26 13:24:25 +0000
@@ -152,15 +152,11 @@
         arguments = self.argument_parser.parse_args()
         argspec = inspect.getargspec(arguments.func)
         vargs = []
-        kwargs = {}
         for arg in argspec.args:
             vargs.append(getattr(arguments, arg))
         if argspec.varargs:
             vargs.extend(getattr(arguments, argspec.varargs))
-        if argspec.keywords:
-            for kwarg in argspec.keywords.items():
-                kwargs[kwarg] = getattr(arguments, kwarg)
-        output = arguments.func(*vargs, **kwargs)
+        output = arguments.func(*vargs)
         if getattr(arguments.func, '_cli_test_command', False):
             self.exit_code = 0 if output else 1
             output = ''

=== modified file 'hooks/charmhelpers/cli/commands.py'
--- hooks/charmhelpers/cli/commands.py	2015-08-03 14:52:57 +0000
+++ hooks/charmhelpers/cli/commands.py	2015-08-26 13:24:25 +0000
@@ -26,7 +26,7 @@
 """
 Import the sub-modules which have decorated subcommands to register with chlp.
 """
-import host  # noqa
-import benchmark  # noqa
-import unitdata  # noqa
-from charmhelpers.core import hookenv  # noqa
+from . import host  # noqa
+from . import benchmark  # noqa
+from . import unitdata  # noqa
+from . import hookenv  # noqa

=== added file 'hooks/charmhelpers/cli/hookenv.py'
--- hooks/charmhelpers/cli/hookenv.py	1970-01-01 00:00:00 +0000
+++ hooks/charmhelpers/cli/hookenv.py	2015-08-26 13:24:25 +0000
@@ -0,0 +1,23 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
+from . import cmdline
+from charmhelpers.core import hookenv
+
+
+cmdline.subcommand('relation-id')(hookenv.relation_id._wrapped)
+cmdline.subcommand('service-name')(hookenv.service_name)
+cmdline.subcommand('remote-service-name')(hookenv.remote_service_name._wrapped)

=== modified file 'hooks/charmhelpers/core/hookenv.py'
--- hooks/charmhelpers/core/hookenv.py	2015-08-03 14:52:57 +0000
+++ hooks/charmhelpers/core/hookenv.py	2015-08-26 13:24:25 +0000
@@ -34,23 +34,6 @@
 import tempfile
 from subprocess import CalledProcessError
 
-try:
-    from charmhelpers.cli import cmdline
-except ImportError as e:
-    # due to the anti-pattern of partially synching charmhelpers directly
-    # into charms, it's possible that charmhelpers.cli is not available;
-    # if that's the case, they don't really care about using the cli anyway,
-    # so mock it out
-    if str(e) == 'No module named cli':
-        class cmdline(object):
-            @classmethod
-            def subcommand(cls, *args, **kwargs):
-                def _wrap(func):
-                    return func
-                return _wrap
-    else:
-        raise
-
 import six
 if not six.PY3:
     from UserDict import UserDict
@@ -91,6 +74,7 @@
         res = func(*args, **kwargs)
         cache[key] = res
         return res
+    wrapper._wrapped = func
     return wrapper
 
 
@@ -190,7 +174,6 @@
     return os.environ.get('JUJU_RELATION', None)
 
 
[e-mail]()
 @cached
 def relation_id(relation_name=None, service_or_unit=None):
     """The relation ID for the current or a specified relation"""
@@ -216,13 +199,11 @@
     return os.environ.get('JUJU_REMOTE_UNIT', None)
 
 
[e-mail]()
 def service_name():
     """The name service group this unit belongs to"""
     return local_unit().split('/')[0]
 
 
[e-mail]()
 @cached
 def remote_service_name(relid=None):
     """The remote service name for a given relation-id (or the current relation)"""

=== modified file 'hooks/charmhelpers/core/host.py'
--- hooks/charmhelpers/core/host.py	2015-08-03 14:52:57 +0000
+++ hooks/charmhelpers/core/host.py	2015-08-26 13:24:25 +0000
@@ -72,7 +72,7 @@
     stopped = service_stop(service_name)
     # XXX: Support systemd too
     override_path = os.path.join(
-        init_dir, '{}.conf.override'.format(service_name))
+        init_dir, '{}.override'.format(service_name))
     with open(override_path, 'w') as fh:
         fh.write("manual\n")
     return stopped
@@ -86,7 +86,7 @@
     if init_dir is None:
         init_dir = "/etc/init"
     override_path = os.path.join(
-        init_dir, '{}.conf.override'.format(service_name))
+        init_dir, '{}.override'.format(service_name))
     if os.path.exists(override_path):
         os.unlink(override_path)
     started = service_start(service_name)
@@ -148,6 +148,16 @@
     return user_info
 
 
+def user_exists(username):
+    """Check if a user exists"""
+    try:
+        pwd.getpwnam(username)
+        user_exists = True
+    except KeyError:
+        user_exists = False
+    return user_exists
+
+
 def add_group(group_name, system_group=False):
     """Add a group to the system"""
     try:
@@ -280,6 +290,17 @@
     return system_mounts
 
 
+def fstab_mount(mountpoint):
+    """Mount filesystem using fstab"""
+    cmd_args = ['mount', mountpoint]
+    try:
+        subprocess.check_output(cmd_args)
+    except subprocess.CalledProcessError as e:
+        log('Error unmounting {}\n{}'.format(mountpoint, e.output))
+        return False
+    return True
+
+
 def file_hash(path, hash_type='md5'):
     """
     Generate a hash checksum of the contents of 'path' or None if not found.
@@ -396,25 +417,80 @@
     return(''.join(random_chars))
 
 
-def list_nics(nic_type):
+def is_phy_iface(interface):
+    """Returns True if interface is not virtual, otherwise False."""
+    if interface:
+        sys_net = '/sys/class/net'
+        if os.path.isdir(sys_net):
+            for iface in glob.glob(os.path.join(sys_net, '*')):
+                if '/virtual/' in os.path.realpath(iface):
+                    continue
+
+                if interface == os.path.basename(iface):
+                    return True
+
+    return False
+
+
+def get_bond_master(interface):
+    """Returns bond master if interface is bond slave otherwise None.
+
+    NOTE: the provided interface is expected to be physical
+    """
+    if interface:
+        iface_path = '/sys/class/net/%s' % (interface)
+        if os.path.exists(iface_path):
+            if '/virtual/' in os.path.realpath(iface_path):
+                return None
+
+            master = os.path.join(iface_path, 'master')
+            if os.path.exists(master):
+                master = os.path.realpath(master)
+                # make sure it is a bond master
+                if os.path.exists(os.path.join(master, 'bonding')):
+                    return os.path.basename(master)
+
+    return None
+
+
+def list_nics(nic_type=None):
     '''Return a list of nics of given type(s)'''
     if isinstance(nic_type, six.string_types):
         int_types = [nic_type]
     else:
         int_types = nic_type
+
     interfaces = []
-    for int_type in int_types:
-        cmd = ['ip', 'addr', 'show', 'label', int_type + '*']
+    if nic_type:
+        for int_type in int_types:
+            cmd = ['ip', 'addr', 'show', 'label', int_type + '*']
+            ip_output = subprocess.check_output(cmd).decode('UTF-8')
+            ip_output = ip_output.split('\n')
+            ip_output = (line for line in ip_output if line)
+            for line in ip_output:
+                if line.split()[1].startswith(int_type):
+                    matched = re.search('.*: (' + int_type +
+                                        r'[0-9]+\.[0-9]+)@.*', line)
+                    if matched:
+                        iface = matched.groups()[0]
+                    else:
+                        iface = line.split()[1].replace(":", "")
+
+                    if iface not in interfaces:
+                        interfaces.append(iface)
+    else:
+        cmd = ['ip', 'a']
         ip_output = subprocess.check_output(cmd).decode('UTF-8').split('\n')
-        ip_output = (line for line in ip_output if line)
+        ip_output = (line.strip() for line in ip_output if line)
+
+        key = re.compile('^[0-9]+:\s+(.+):')
         for line in ip_output:
-            if line.split()[1].startswith(int_type):
-                matched = re.search('.*: (' + int_type + r'[0-9]+\.[0-9]+)@.*', line)
-                if matched:
-                    interface = matched.groups()[0]
-                else:
-                    interface = line.split()[1].replace(":", "")
-                interfaces.append(interface)
+            matched = re.search(key, line)
+            if matched:
+                iface = matched.group(1)
+                iface = iface.partition("@")[0]
+                if iface not in interfaces:
+                    interfaces.append(iface)
 
     return interfaces
 

=== added file 'hooks/charmhelpers/core/hugepage.py'
--- hooks/charmhelpers/core/hugepage.py	1970-01-01 00:00:00 +0000
+++ hooks/charmhelpers/core/hugepage.py	2015-08-26 13:24:25 +0000
@@ -0,0 +1,62 @@
+# -*- coding: utf-8 -*-
+
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
+import yaml
+from charmhelpers.core import fstab
+from charmhelpers.core import sysctl
+from charmhelpers.core.host import (
+    add_group,
+    add_user_to_group,
+    fstab_mount,
+    mkdir,
+)
+
+
+def hugepage_support(user, group='hugetlb', nr_hugepages=256,
+                     max_map_count=65536, mnt_point='/run/hugepages/kvm',
+                     pagesize='2MB', mount=True):
+    """Enable hugepages on system.
+
+    Args:
+    user (str)  -- Username to allow access to hugepages to
+    group (str) -- Group name to own hugepages
+    nr_hugepages (int) -- Number of pages to reserve
+    max_map_count (int) -- Number of Virtual Memory Areas a process can own
+    mnt_point (str) -- Directory to mount hugepages on
+    pagesize (str) -- Size of hugepages
+    mount (bool) -- Whether to Mount hugepages
+    """
+    group_info = add_group(group)
+    gid = group_info.gr_gid
+    add_user_to_group(user, group)
+    sysctl_settings = {
+        'vm.nr_hugepages': nr_hugepages,
+        'vm.max_map_count': max_map_count,
+        'vm.hugetlb_shm_group': gid,
+    }
+    sysctl.create(yaml.dump(sysctl_settings), '/etc/sysctl.d/10-hugepage.conf')
+    mkdir(mnt_point, owner='root', group='root', perms=0o755, force=False)
+    lfstab = fstab.Fstab()
+    fstab_entry = lfstab.get_entry_by_attr('mountpoint', mnt_point)
+    if fstab_entry:
+        lfstab.remove_entry(fstab_entry)
+    entry = lfstab.Entry('nodev', mnt_point, 'hugetlbfs',
+                         'mode=1770,gid={},pagesize={}'.format(gid, pagesize), 0, 0)
+    lfstab.add_entry(entry)
+    if mount:
+        fstab_mount(mnt_point)

=== modified file 'hooks/charmhelpers/core/services/helpers.py'
--- hooks/charmhelpers/core/services/helpers.py	2015-08-03 14:52:57 +0000
+++ hooks/charmhelpers/core/services/helpers.py	2015-08-26 13:24:25 +0000
@@ -16,7 +16,9 @@
 
 import os
 import yaml
+
 from charmhelpers.core import hookenv
+from charmhelpers.core import host
 from charmhelpers.core import templating
 
 from charmhelpers.core.services.base import ManagerCallback
@@ -240,27 +242,41 @@
 
     :param str source: The template source file, relative to
         `$CHARM_DIR/templates`
+
     :param str target: The target to write the rendered template to
     :param str owner: The owner of the rendered file
     :param str group: The group of the rendered file
     :param int perms: The permissions of the rendered file
-
+    :param partial on_change_action: functools partial to be executed when
+                                     rendered file changes
     """
     def __init__(self, source, target,
-                 owner='root', group='root', perms=0o444):
+                 owner='root', group='root', perms=0o444,
+                 on_change_action=None):
         self.source = source
         self.target = target
         self.owner = owner
         self.group = group
         self.perms = perms
+        self.on_change_action = on_change_action
 
     def __call__(self, manager, service_name, event_name):
+        pre_checksum = ''
+        if self.on_change_action and os.path.isfile(self.target):
+            pre_checksum = host.file_hash(self.target)
         service = manager.get_service(service_name)
         context = {}
         for ctx in service.get('required_data', []):
             context.update(ctx)
         templating.render(self.source, self.target, context,
                           self.owner, self.group, self.perms)
+        if self.on_change_action:
+            if pre_checksum == host.file_hash(self.target):
+                hookenv.log(
+                    'No change detected: {}'.format(self.target),
+                    hookenv.DEBUG)
+            else:
+                self.on_change_action()
 
 
 # Convenience aliases for templates

=== modified file 'hooks/charmhelpers/fetch/__init__.py'
--- hooks/charmhelpers/fetch/__init__.py	2015-08-03 14:52:57 +0000
+++ hooks/charmhelpers/fetch/__init__.py	2015-08-26 13:24:25 +0000
@@ -90,6 +90,14 @@
     'kilo/proposed': 'trusty-proposed/kilo',
     'trusty-kilo/proposed': 'trusty-proposed/kilo',
     'trusty-proposed/kilo': 'trusty-proposed/kilo',
+    # Liberty
+    'liberty': 'trusty-updates/liberty',
+    'trusty-liberty': 'trusty-updates/liberty',
+    'trusty-liberty/updates': 'trusty-updates/liberty',
+    'trusty-updates/liberty': 'trusty-updates/liberty',
+    'liberty/proposed': 'trusty-proposed/liberty',
+    'trusty-liberty/proposed': 'trusty-proposed/liberty',
+    'trusty-proposed/liberty': 'trusty-proposed/liberty',
 }
 
 # The order of this list is very important. Handlers should be listed in from

=== modified file 'metadata.yaml'
--- metadata.yaml	2013-09-19 15:58:28 +0000
+++ metadata.yaml	2015-08-26 13:24:25 +0000
@@ -5,7 +5,7 @@
   Percona XtraDB Cluster provides an active/active MySQL
   compatible alternative implemented using the Galera
   synchronous replication extensions.
-categories:
+tags:
   - databases
 provides:
   db:

=== renamed file 'tests/00-setup.sh' => 'tests/00-setup'
--- tests/00-setup.sh	2015-04-15 12:11:46 +0000
+++ tests/00-setup	2015-08-26 13:24:25 +0000
@@ -1,29 +1,16 @@
-#!/bin/bash -x
-# The script installs amulet and other tools needed for the amulet tests.
-
-# Get the status of the amulet package, this returns 0 of package is installed.
-dpkg -s amulet
-if [ $? -ne 0 ]; then
-  # Install the Amulet testing harness.
-  sudo add-apt-repository -y ppa:juju/stable
-  sudo apt-get update 
-  sudo apt-get install -y -q amulet juju-core charm-tools
-fi
-
-
-PACKAGES="python3 python3-yaml"
-for pkg in $PACKAGES; do
-  dpkg -s python3
-  if [ $? -ne 0 ]; then
-    sudo apt-get install -y -q $pkg
-  fi
-done
-
-
-#if [ ! -f "$(dirname $0)/../local.yaml" ]; then
-#  echo "To run these amulet tests a vip is needed, create a file called \
-#local.yaml in the charm dir, this file must contain a 'vip', if you're \
-#using the local provider with lxc you could use a free IP from the range \
-#10.0.3.0/24"
-#  exit 1
-#fi
+#!/bin/bash
+
+set -ex
+
+sudo add-apt-repository --yes ppa:juju/stable
+sudo apt-get update --yes
+sudo apt-get install --yes amulet \
+                           python-cinderclient \
+                           python-distro-info \
+                           python-glanceclient \
+                           python-heatclient \
+                           python-keystoneclient \
+                           python-neutronclient \
+                           python-novaclient \
+                           python-pika \
+                           python-swiftclient

=== modified file 'tests/basic_deployment.py'
--- tests/basic_deployment.py	2015-07-22 11:17:09 +0000
+++ tests/basic_deployment.py	2015-08-26 13:24:25 +0000
@@ -100,7 +100,7 @@
 
             resources = ['res_mysql_vip']
             resources += ['res_mysql_monitor:%d' %
-                          i for i in range(self.units)]
+                          m for m in range(self.units)]
 
             assert sorted(self.get_pcmkr_resources()) == sorted(resources)
         else:

=== modified file 'tests/charmhelpers/contrib/amulet/utils.py'
--- tests/charmhelpers/contrib/amulet/utils.py	2015-08-03 14:52:57 +0000
+++ tests/charmhelpers/contrib/amulet/utils.py	2015-08-26 13:24:25 +0000
@@ -14,17 +14,23 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
 
-import amulet
-import ConfigParser
-import distro_info
 import io
+import json
 import logging
 import os
 import re
-import six
+import subprocess
 import sys
 import time
-import urlparse
+
+import amulet
+import distro_info
+import six
+from six.moves import configparser
+if six.PY3:
+    from urllib import parse as urlparse
+else:
+    import urlparse
 
 
 class AmuletUtils(object):
@@ -142,19 +148,23 @@
 
             for service_name in services_list:
                 if (self.ubuntu_releases.index(release) >= systemd_switch or
-                        service_name == "rabbitmq-server"):
-                    # init is systemd
+                        service_name in ['rabbitmq-server', 'apache2']):
+                    # init is systemd (or regular sysv)
                     cmd = 'sudo service {} status'.format(service_name)
+                    output, code = sentry_unit.run(cmd)
+                    service_running = code == 0
                 elif self.ubuntu_releases.index(release) < systemd_switch:
                     # init is upstart
                     cmd = 'sudo status {}'.format(service_name)
+                    output, code = sentry_unit.run(cmd)
+                    service_running = code == 0 and "start/running" in output
 
-                output, code = sentry_unit.run(cmd)
                 self.log.debug('{} `{}` returned '
                                '{}'.format(sentry_unit.info['unit_name'],
                                            cmd, code))
-                if code != 0:
-                    return "command `{}` returned {}".format(cmd, str(code))
+                if not service_running:
+                    return u"command `{}` returned {} {}".format(
+                        cmd, output, str(code))
         return None
 
     def _get_config(self, unit, filename):
@@ -164,7 +174,7 @@
         # NOTE(beisner):  by default, ConfigParser does not handle options
         # with no value, such as the flags used in the mysql my.cnf file.
         # https://bugs.python.org/issue7005
-        config = ConfigParser.ConfigParser(allow_no_value=True)
+        config = configparser.ConfigParser(allow_no_value=True)
         config.readfp(io.StringIO(file_contents))
         return config
 
@@ -450,15 +460,20 @@
                                         cmd, code, output))
         return None
 
-    def get_process_id_list(self, sentry_unit, process_name):
+    def get_process_id_list(self, sentry_unit, process_name,
+                            expect_success=True):
         """Get a list of process ID(s) from a single sentry juju unit
         for a single process name.
 
-        :param sentry_unit: Pointer to amulet sentry instance (juju unit)
+        :param sentry_unit: Amulet sentry instance (juju unit)
         :param process_name: Process name
+        :param expect_success: If False, expect the PID to be missing,
+            raise if it is present.
         :returns: List of process IDs
         """
-        cmd = 'pidof {}'.format(process_name)
+        cmd = 'pidof -x {}'.format(process_name)
+        if not expect_success:
+            cmd += " || exit 0 && exit 1"
         output, code = sentry_unit.run(cmd)
         if code != 0:
             msg = ('{} `{}` returned {} '
@@ -467,14 +482,23 @@
             amulet.raise_status(amulet.FAIL, msg=msg)
         return str(output).split()
 
-    def get_unit_process_ids(self, unit_processes):
+    def get_unit_process_ids(self, unit_processes, expect_success=True):
         """Construct a dict containing unit sentries, process names, and
-        process IDs."""
+        process IDs.
+
+        :param unit_processes: A dictionary of Amulet sentry instance
+            to list of process names.
+        :param expect_success: if False expect the processes to not be
+            running, raise if they are.
+        :returns: Dictionary of Amulet sentry instance to dictionary
+            of process names to PIDs.
+        """
         pid_dict = {}
-        for sentry_unit, process_list in unit_processes.iteritems():
+        for sentry_unit, process_list in six.iteritems(unit_processes):
             pid_dict[sentry_unit] = {}
             for process in process_list:
-                pids = self.get_process_id_list(sentry_unit, process)
+                pids = self.get_process_id_list(
+                    sentry_unit, process, expect_success=expect_success)
                 pid_dict[sentry_unit].update({process: pids})
         return pid_dict
 
@@ -488,7 +512,7 @@
             return ('Unit count mismatch.  expected, actual: {}, '
                     '{} '.format(len(expected), len(actual)))
 
-        for (e_sentry, e_proc_names) in expected.iteritems():
+        for (e_sentry, e_proc_names) in six.iteritems(expected):
             e_sentry_name = e_sentry.info['unit_name']
             if e_sentry in actual.keys():
                 a_proc_names = actual[e_sentry]
@@ -507,11 +531,23 @@
                             '{}'.format(e_proc_name, a_proc_name))
 
                 a_pids_length = len(a_pids)
-                if e_pids_length != a_pids_length:
-                    return ('PID count mismatch. {} ({}) expected, actual: '
+                fail_msg = ('PID count mismatch. {} ({}) expected, actual: '
                             '{}, {} ({})'.format(e_sentry_name, e_proc_name,
                                                  e_pids_length, a_pids_length,
                                                  a_pids))
+
+                # If expected is not bool, ensure PID quantities match
+                if not isinstance(e_pids_length, bool) and \
+                        a_pids_length != e_pids_length:
+                    return fail_msg
+                # If expected is bool True, ensure 1 or more PIDs exist
+                elif isinstance(e_pids_length, bool) and \
+                        e_pids_length is True and a_pids_length < 1:
+                    return fail_msg
+                # If expected is bool False, ensure 0 PIDs exist
+                elif isinstance(e_pids_length, bool) and \
+                        e_pids_length is False and a_pids_length != 0:
+                    return fail_msg
                 else:
                     self.log.debug('PID check OK: {} {} {}: '
                                    '{}'.format(e_sentry_name, e_proc_name,
@@ -531,3 +567,30 @@
             return 'Dicts within list are not identical'
 
         return None
+
+    def run_action(self, unit_sentry, action,
+                   _check_output=subprocess.check_output):
+        """Run the named action on a given unit sentry.
+
+        _check_output parameter is used for dependency injection.
+
+        @return action_id.
+        """
+        unit_id = unit_sentry.info["unit_name"]
+        command = ["juju", "action", "do", "--format=json", unit_id, action]
+        self.log.info("Running command: %s\n" % " ".join(command))
+        output = _check_output(command, universal_newlines=True)
+        data = json.loads(output)
+        action_id = data[u'Action queued with id']
+        return action_id
+
+    def wait_on_action(self, action_id, _check_output=subprocess.check_output):
+        """Wait for a given action, returning if it completed or not.
+
+        _check_output parameter is used for dependency injection.
+        """
+        command = ["juju", "action", "fetch", "--format=json", "--wait=0",
+                   action_id]
+        output = _check_output(command, universal_newlines=True)
+        data = json.loads(output)
+        return data.get(u"status") == "completed"

=== modified file 'tests/charmhelpers/contrib/openstack/amulet/deployment.py'
--- tests/charmhelpers/contrib/openstack/amulet/deployment.py	2015-08-03 14:52:57 +0000
+++ tests/charmhelpers/contrib/openstack/amulet/deployment.py	2015-08-26 13:24:25 +0000
@@ -44,7 +44,7 @@
            Determine if the local branch being tested is derived from its
            stable or next (dev) branch, and based on this, use the corresonding
            stable or next branches for the other_services."""
-        base_charms = ['mysql', 'mongodb']
+        base_charms = ['mysql', 'mongodb', 'nrpe']
 
         if self.series in ['precise', 'trusty']:
             base_series = self.series
@@ -81,7 +81,7 @@
                       'ceph-osd', 'ceph-radosgw']
         # Most OpenStack subordinate charms do not expose an origin option
         # as that is controlled by the principle.
-        ignore = ['cinder-ceph', 'hacluster', 'neutron-openvswitch']
+        ignore = ['cinder-ceph', 'hacluster', 'neutron-openvswitch', 'nrpe']
 
         if self.openstack:
             for svc in services:

=== added file 'tests/tests.yaml'
--- tests/tests.yaml	1970-01-01 00:00:00 +0000
+++ tests/tests.yaml	2015-08-26 13:24:25 +0000
@@ -0,0 +1,19 @@
+bootstrap: true
+reset: true
+virtualenv: true
+makefile:
+    - lint
+    - test
+sources:
+    - ppa:juju/stable
+packages:
+    - amulet
+    - python-cinderclient
+    - python-distro-info
+    - python-glanceclient
+    - python-heatclient
+    - python-keystoneclient
+    - python-neutronclient
+    - python-novaclient
+    - python-pika
+    - python-swiftclient

=== modified file 'unit_tests/test_percona_hooks.py'
--- unit_tests/test_percona_hooks.py	2015-03-17 14:37:44 +0000
+++ unit_tests/test_percona_hooks.py	2015-08-26 13:24:25 +0000
@@ -36,6 +36,7 @@
         self.get_db_helper.return_value = helper
         self.test_config.set('vip', '10.0.3.3')
         self.test_config.set('sst-password', password)
+
         def f(k):
             return self.test_config.get(k)
 
@@ -48,12 +49,12 @@
                                              'cidr_netmask="24" '
                                              'nic="eth0"'),
                            'res_mysql_monitor':
-                               hooks.RES_MONITOR_PARAMS % {'sstpass': 'ubuntu'}}
+                           hooks.RES_MONITOR_PARAMS % {'sstpass': 'ubuntu'}}
         groups = {'grp_percona_cluster': 'res_mysql_vip'}
 
         clones = {'cl_mysql_monitor': 'res_mysql_monitor meta interleave=true'}
 
-        colocations = {'vip_mysqld': 'inf: grp_percona_cluster cl_mysql_monitor'}
+        colocations = {'vip_mysqld': 'inf: grp_percona_cluster cl_mysql_monitor'}  # noqa
 
         locations = {'loc_percona_cluster':
                      'grp_percona_cluster rule inf: writable eq 1'}

=== modified file 'unit_tests/test_percona_utils.py'
--- unit_tests/test_percona_utils.py	2015-07-29 10:21:16 +0000
+++ unit_tests/test_percona_utils.py	2015-08-26 13:24:25 +0000
@@ -111,8 +111,8 @@
                                     mock_log, mock_get_ipv6_addr):
         ipv6addr = '2001:db8:1:0:f816:3eff:fe79:cd'
         mock_get_ipv6_addr.return_value = [ipv6addr]
-        mock_rel_ids.return_value = [1,2]
-        mock_rel_units.return_value = [3,4]
+        mock_rel_ids.return_value = [1, 2]
+        mock_rel_units.return_value = [3, 4]
         mock_get_host_ip.return_value = 'hostA'
 
         def _mock_rel_get(*args, **kwargs):