Add blazar-status upgrade check command framework

This adds basic framework for blazar-status upgrade
check commands. For now it has only "check_placeholder"
check implemented.
Real checks can be added to this tool in the future.

Change-Id: I6f40be87eb7e20fb396191e60af023923eb9019a
Story: 2003657
Task: 26121
This commit is contained in:
whoami-rajat 2018-10-19 14:41:07 +05:30
parent 44bc4383ab
commit 604b71520b
8 changed files with 178 additions and 0 deletions

53
blazar/cmd/status.py Normal file
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@ -0,0 +1,53 @@
# Copyright (c) 2018 NEC, Corp.
#
# 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 sys
from oslo_config import cfg
from oslo_upgradecheck import upgradecheck
from blazar.i18n import _
class Checks(upgradecheck.UpgradeCommands):
"""Various upgrade checks should be added as separate methods in this class
and added to _upgrade_checks tuple.
"""
def _check_placeholder(self):
# This is just a placeholder for upgrade checks, it should be
# removed when the actual checks are added
return upgradecheck.Result(upgradecheck.Code.SUCCESS)
# The format of the check functions is to return an
# oslo_upgradecheck.upgradecheck.Result
# object with the appropriate
# oslo_upgradecheck.upgradecheck.Code and details set.
# If the check hits warnings or failures then those should be stored
# in the returned Result's "details" attribute. The
# summary will be rolled up at the end of the check() method.
_upgrade_checks = (
# In the future there should be some real checks added here
(_('Placeholder'), _check_placeholder),
)
def main():
return upgradecheck.main(
cfg.CONF, project='blazar', upgrade_command=Checks())
if __name__ == '__main__':
sys.exit(main())

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# Copyright (c) 2018 NEC, Corp.
#
# 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.
from oslo_upgradecheck.upgradecheck import Code
from blazar.cmd import status
from blazar import tests
class TestUpgradeChecks(tests.TestCase):
def setUp(self):
super(TestUpgradeChecks, self).setUp()
self.cmd = status.Checks()
def test__check_placeholder(self):
check_result = self.cmd._check_placeholder()
self.assertEqual(
Code.SUCCESS, check_result.code)

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=============
blazar-status
=============
Synopsis
========
::
blazar-status <category> <command> [<args>]
Description
===========
:program:`blazar-status` is a tool that provides routines for checking the
status of a Blazar deployment.
Options
=======
The standard pattern for executing a :program:`blazar-status` command is::
blazar-status <category> <command> [<args>]
Run without arguments to see a list of available command categories::
blazar-status
Categories are:
* ``upgrade``
Detailed descriptions are below.
You can also run with a category argument such as ``upgrade`` to see a list of
all commands in that category::
blazar-status upgrade
These sections describe the available categories and arguments for
:program:`blazar-status`.
Upgrade
~~~~~~~
.. _blazar-status-checks:
``blazar-status upgrade check``
Performs a release-specific readiness check before restarting services with
new code. This command expects to have complete configuration and access
to databases and services.
**Return Codes**
.. list-table::
:widths: 20 80
:header-rows: 1
* - Return code
- Description
* - 0
- All upgrade readiness checks passed successfully and there is nothing
to do.
* - 1
- At least one check encountered an issue and requires further
investigation. This is considered a warning but the upgrade may be OK.
* - 2
- There was an upgrade status check failure that needs to be
investigated. This should be considered something that stops an
upgrade.
* - 255
- An unexpected error occurred.
**History of Checks**
**3.0.0 (Stein)**
* Placeholder to be filled in with checks as they are added in Stein.

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@ -6,3 +6,4 @@ Command-Line Interface Reference
host-reservation
instance-reservation
blazar-status

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@ -61,6 +61,7 @@ oslo.middleware==3.31.0
oslo.policy==1.30.0
oslo.serialization==2.18.0
oslo.service==1.24.0
oslo.upgradecheck==0.1.0
oslo.utils==3.33.0
oslotest==3.2.0
Paste==2.0.3

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---
prelude: >
Added new tool ``blazar-status upgrade check``.
features:
- |
New framework for ``blazar-status upgrade check`` command is added.
This framework allows adding various checks which can be run before a
Blazar upgrade to ensure if the upgrade can be performed safely.
upgrade:
- |
Operator can now use new CLI tool ``blazar-status upgrade check``
to check if Blazar deployment can be safely upgraded from
N-1 to N release.

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@ -21,6 +21,7 @@ oslo.middleware>=3.31.0 # Apache-2.0
oslo.policy>=1.30.0 # Apache-2.0
oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0
oslo.service!=1.28.1,>=1.24.0 # Apache-2.0
oslo.upgradecheck>=0.1.0 # Apache-2.0
oslo.utils>=3.33.0 # Apache-2.0
python-novaclient>=9.1.0 # Apache-2.0
netaddr>=0.7.18 # BSD

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@ -33,6 +33,7 @@ console_scripts =
blazar-api=blazar.cmd.api:main
blazar-rpc-zmq-receiver=blazar.cmd.rpc_zmq_receiver:main
blazar-manager=blazar.cmd.manager:main
blazar-status=blazar.cmd.status:main
blazar.resource.plugins =
dummy.vm.plugin=blazar.plugins.dummy_vm_plugin:DummyVMPlugin