openstack/charm-ceph-nfs
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[flake8]
max-line-length = 99
select: E,W,F,C,N
exclude:
venv
.git
build
dist
*.egg_info

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.tox
**/*.swp
__pycache__
.stestr/
lib/*
!lib/README.txt
build
ceph-iscsi.charm

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/venv
*.py[cod]
*.charm

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[DEFAULT]
test_path=./unit_tests
top_dir=./

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# ceph-nfs
## Developing
Create and activate a virtualenv with the development requirements:
virtualenv -p python3 venv
source venv/bin/activate
pip install -r requirements-dev.txt
## Code overview
TEMPLATE-TODO:
One of the most important things a consumer of your charm (or library)
needs to know is what set of functionality it provides. Which categories
does it fit into? Which events do you listen to? Which libraries do you
consume? Which ones do you export and how are they used?
## Intended use case
TEMPLATE-TODO:
Why were these decisions made? What's the scope of your charm?
## Roadmap
If this Charm doesn't fulfill all of the initial functionality you were
hoping for or planning on, please add a Roadmap or TODO here
## Testing
The Python operator framework includes a very nice harness for testing
operator behaviour without full deployment. Just `run_tests`:
./run_tests

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# ceph-nfs
## Description
TODO: Describe your charm in a few paragraphs of Markdown
## Usage
TODO: Provide high-level usage, such as required config or relations
## Relations
TODO: Provide any relations which are provided or required by your charm
## OCI Images
TODO: Include a link to the default image your charm uses
## Contributing
Please see the [Juju SDK docs](https://juju.is/docs/sdk) for guidelines
on enhancements to this charm following best practice guidelines, and
`CONTRIBUTING.md` for developer guidance.

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# Copyright 2021 OpenStack Charmers
# See LICENSE file for licensing details.
#
# TEMPLATE-TODO: change this example to suit your needs.
# If you don't need actions, you can remove the file entirely.
# It ties in to the example _on_fortune_action handler in src/charm.py
#
# Learn more about actions at: https://juju.is/docs/sdk/actions
fortune:
description: Returns a pithy phrase.
params:
fail:
description: "Fail with this message"
type: string
default: ""

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git+https://github.com/canonical/charmcraft.git@0.10.2#egg=charmcraft

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# Learn more about charmcraft.yaml configuration at:
# https://juju.is/docs/sdk/charmcraft-config
type: "charm"
bases:
- build-on:
- name: "ubuntu"
channel: "20.04"
run-on:
- name: "ubuntu"
channel: "20.04"

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# Copyright 2021 OpenStack Charmers
# See LICENSE file for licensing details.
#
# TEMPLATE-TODO: change this example to suit your needs.
# If you don't need a config, you can remove the file entirely.
# It ties in to the example _on_config_changed handler in src/charm.py
#
# Learn more about config at: https://juju.is/docs/sdk/config
options:
thing:
default: 🎁
description: A thing used by the charm.
type: string

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# Copyright 2021 OpenStack Charmers
# See LICENSE file for licensing details.
# For a complete list of supported options, see:
# https://discourse.charmhub.io/t/charm-metadata-v2/3674/15
name: ceph-nfs
display-name: |
TEMPLATE-TODO: fill out a display name for the Charmcraft store
description: |
TEMPLATE-TODO: fill out the charm's description
summary: |
TEMPLATE-TODO: fill out the charm's summary
# TEMPLATE-TODO: replace with containers for your workload (delete for non-k8s)
containers:
httpbin:
resource: httpbin-image
# TEMPLATE-TODO: each container defined above must specify an oci-image resource
resources:
httpbin-image:
type: oci-image
description: OCI image for httpbin (kennethreitz/httpbin)

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- project:
templates:
- charm-unit-jobs
check:
jobs:
- octopus
- pacific
vars:
needs_charm_build: true
charm_build_name: ceph-iscsi
build_type: charmcraft
- job:
name: focal-octopus
parent: func-target
dependencies:
- osci-lint
- tox-py35
- tox-py36
- tox-py37
- tox-py38
vars:
tox_extra_args: focal-octopus
- job:
name: focal-pacific
parent: func-target
dependencies: &smoke-jobs
- focal-octopus
vars:
tox_extra_args: focal-pacific

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-r requirements.txt
coverage
flake8

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# requirements
git+https://github.com/juju/charm-helpers.git#egg=charmhelpers
git+https://github.com/canonical/operator.git#egg=ops
git+https://opendev.org/openstack/charm-ops-interface-ceph-client#egg=interface_ceph_client
git+https://opendev.org/openstack/charm-ops-openstack#egg=ops_openstack

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#!/usr/bin/env python3
# Copyright 2021 OpenStack Charmers
# See LICENSE file for licensing details.
#
# Learn more at: https://juju.is/docs/sdk
"""Charm the service.
Refer to the following post for a quick-start guide that will help you
develop a new k8s charm using the Operator Framework:
https://discourse.charmhub.io/t/4208
"""
import logging
from ops.charm import CharmBase
from ops.framework import StoredState
from ops.main import main
from ops.model import ActiveStatus
import ops_openstack.adapters
import ops_openstack.core
import ops_openstack.plugins.classes
logger = logging.getLogger(__name__)
class CephClientAdapter(ops_openstack.adapters.OpenStackOperRelationAdapter):
"""Adapter for ceph client interface."""
@property
def mon_hosts(self):
"""Sorted list of ceph mon addresses.
:returns: Ceph MON addresses.
:rtype: str
"""
hosts = self.relation.get_relation_data()['mon_hosts']
return ' '.join(sorted(hosts))
@property
def auth_supported(self):
"""Authentication type.
:returns: Authentication type
:rtype: str
"""
return self.relation.get_relation_data()['auth']
@property
def key(self):
"""Key client should use when communicating with Ceph cluster.
:returns: Key
:rtype: str
"""
return self.relation.get_relation_data()['key']
class CephNfsCharm(CharmBase):
"""Charm the service."""
_stored = StoredState()
def __init__(self, *args):
super().__init__(*args)
self.framework.observe(self.on.httpbin_pebble_ready, self._on_httpbin_pebble_ready)
self.framework.observe(self.on.config_changed, self._on_config_changed)
self.framework.observe(self.on.fortune_action, self._on_fortune_action)
self._stored.set_default(things=[])
def _on_httpbin_pebble_ready(self, event):
"""Define and start a workload using the Pebble API.
TEMPLATE-TODO: change this example to suit your needs.
You'll need to specify the right entrypoint and environment
configuration for your specific workload. Tip: you can see the
standard entrypoint of an existing container using docker inspect
Learn more about Pebble layers at https://github.com/canonical/pebble
"""
# Get a reference the container attribute on the PebbleReadyEvent
container = event.workload
# Define an initial Pebble layer configuration
pebble_layer = {
"summary": "httpbin layer",
"description": "pebble config layer for httpbin",
"services": {
"httpbin": {
"override": "replace",
"summary": "httpbin",
"command": "gunicorn -b 0.0.0.0:80 httpbin:app -k gevent",
"startup": "enabled",
"environment": {"thing": self.model.config["thing"]},
}
},
}
# Add intial Pebble config layer using the Pebble API
container.add_layer("httpbin", pebble_layer, combine=True)
# Autostart any services that were defined with startup: enabled
container.autostart()
# Learn more about statuses in the SDK docs:
# https://juju.is/docs/sdk/constructs#heading--statuses
self.unit.status = ActiveStatus()
def _on_config_changed(self, _):
"""Just an example to show how to deal with changed configuration.
TEMPLATE-TODO: change this example to suit your needs.
If you don't need to handle config, you can remove this method,
the hook created in __init__.py for it, the corresponding test,
and the config.py file.
Learn more about config at https://juju.is/docs/sdk/config
"""
current = self.config["thing"]
if current not in self._stored.things:
logger.debug("found a new thing: %r", current)
self._stored.things.append(current)
def _on_fortune_action(self, event):
"""Just an example to show how to receive actions.
TEMPLATE-TODO: change this example to suit your needs.
If you don't need to handle actions, you can remove this method,
the hook created in __init__.py for it, the corresponding test,
and the actions.py file.
Learn more about actions at https://juju.is/docs/sdk/actions
"""
fail = event.params["fail"]
if fail:
event.fail(fail)
else:
event.set_results({"fortune": "A bug in the code is worth two in the documentation."})
if __name__ == "__main__":
main(CephNfsCharm)

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[client.ceph-nfs]
key = {{ ceph_client.key }}

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###############################################################################
# [ WARNING ]
# configuration file maintained by Juju
# local changes will be overwritten.
###############################################################################
[global]
auth supported = {{ ceph_client.auth_supported }}
mon host = {{ ceph_client.mon_hosts }}
keyring = /etc/ceph/nfs/$cluster.$name.keyring
[client.ceph-nfs]
client mount uid = 0
client mount gid = 0
log file = /var/log/ceph/ceph-client.nfs.log

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# This file is managed centrally. If you find the need to modify this as a
# one-off, please don't. Intead, consult #openstack-charms and ask about
# requirements management in charms via bot-control. Thank you.
charm-tools>=2.4.4
coverage>=3.6
mock>=1.2
flake8>=2.2.4
stestr>=2.2.0
requests>=2.18.4
psutil
# oslo.i18n dropped py35 support
oslo.i18n<4.0.0
git+https://github.com/openstack-charmers/zaza.git#egg=zaza
git+https://github.com/openstack-charmers/zaza-openstack-tests.git#egg=zaza.openstack
pytz # workaround for 14.04 pip/tox
pyudev # for ceph-* charm unit tests (not mocked?)

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local_overlay_enabled: False
series: focal
applications:
ubuntu:
charm: cs:ubuntu
num_units: 2
ceph-nfs:
charm: ../../ceph-nfs.charm
num_units: 2
ceph-osd:
charm: cs:~openstack-charmers-next/ceph-osd
num_units: 3
storage:
osd-devices: '2,10G'
options:
osd-devices: '/dev/test-non-existent'
ceph-mon:
charm: cs:~openstack-charmers-next/ceph-mon
num_units: 3
options:
monitor-count: '3'
excpected-osd-count: 6
relations:
- - 'ceph-mon:client'
- 'ceph-nfs:ceph-client'
- - 'ceph-osd:mon'
- 'ceph-mon:osd'

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charm_name: ceph-nfs
gate_bundles:
- focal-octopuc
- focal-pacific
smoke_bundles:
- focal-octopus
configure: []
tests: []
target_deploy_status:
ubuntu:
workload-status: active
workload-status-message: ''

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# Operator charm (with zaza): tox.ini
[tox]
envlist = pep8,py3
skipsdist = True
# NOTE: Avoid build/test env pollution by not enabling sitepackages.
sitepackages = False
# NOTE: Avoid false positives by not skipping missing interpreters.
skip_missing_interpreters = False
# NOTES:
# * We avoid the new dependency resolver by pinning pip < 20.3, see
# https://github.com/pypa/pip/issues/9187
# * Pinning dependencies requires tox >= 3.2.0, see
# https://tox.readthedocs.io/en/latest/config.html#conf-requires
# * It is also necessary to pin virtualenv as a newer virtualenv would still
# lead to fetching the latest pip in the func* tox targets, see
# https://stackoverflow.com/a/38133283
requires = pip < 20.3
virtualenv < 20.0
# NOTE: https://wiki.canonical.com/engineering/OpenStack/InstallLatestToxOnOsci
minversion = 3.2.0
[testenv]
setenv = VIRTUAL_ENV={envdir}
PYTHONHASHSEED=0
CHARM_DIR={envdir}
install_command =
pip install {opts} {packages}
commands = stestr run --slowest {posargs}
whitelist_externals =
git
add-to-archive.py
bash
passenv = HOME TERM CS_* OS_* TEST_*
deps = -r{toxinidir}/test-requirements.txt
[testenv:py35]
basepython = python3.5
# python3.5 is irrelevant on a focal+ charm.
commands = /bin/true
[testenv:py36]
basepython = python3.6
deps = -r{toxinidir}/requirements.txt
-r{toxinidir}/test-requirements.txt
[testenv:py37]
basepython = python3.7
deps = -r{toxinidir}/requirements.txt
-r{toxinidir}/test-requirements.txt
[testenv:py38]
basepython = python3.8
deps = -r{toxinidir}/requirements.txt
-r{toxinidir}/test-requirements.txt
[testenv:py3]
basepython = python3
deps = -r{toxinidir}/requirements.txt
-r{toxinidir}/test-requirements.txt
[testenv:pep8]
basepython = python3
deps = -r{toxinidir}/requirements.txt
-r{toxinidir}/test-requirements.txt
commands = flake8 {posargs} src unit_tests tests
[testenv:cover]
# Technique based heavily upon
# https://github.com/openstack/nova/blob/master/tox.ini
basepython = python3
deps = -r{toxinidir}/requirements.txt
-r{toxinidir}/test-requirements.txt
setenv =
{[testenv]setenv}
PYTHON=coverage run
commands =
coverage erase
stestr run --slowest {posargs}
coverage combine
coverage html -d cover
coverage xml -o cover/coverage.xml
coverage report
[coverage:run]
branch = True
concurrency = multiprocessing
parallel = True
source =
.
omit =
.tox/*
*/charmhelpers/*
unit_tests/*
[testenv:venv]
basepython = python3
commands = {posargs}
[testenv:build]
basepython = python3
deps = -r{toxinidir}/build-requirements.txt
commands =
charmcraft build
[testenv:func-noop]
basepython = python3
commands =
functest-run-suite --help
[testenv:func]
basepython = python3
commands =
functest-run-suite --keep-model
[testenv:func-smoke]
basepython = python3
commands =
functest-run-suite --keep-model --smoke
[testenv:func-dev]
basepython = python3
commands =
functest-run-suite --keep-model --dev
[testenv:func-target]
basepython = python3
commands =
functest-run-suite --keep-model --bundle {posargs}
[flake8]
# Ignore E902 because the unit_tests directory is missing in the built charm.
ignore = E402,E226,E902

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# Copyright 2021 OpenStack Charmers
# See LICENSE file for licensing details.
#
# Learn more about testing at: https://juju.is/docs/sdk/testing
import unittest
import sys
sys.path.append('lib') # noqa
sys.path.append('src') # noqa
from unittest.mock import Mock
from charm import CephNfsCharm
from ops.model import ActiveStatus
from ops.testing import Harness
class TestCharm(unittest.TestCase):
def setUp(self):
self.harness = Harness(CephNfsCharm)
self.addCleanup(self.harness.cleanup)
self.harness.begin()
def test_config_changed(self):
self.assertEqual(list(self.harness.charm._stored.things), [])
self.harness.update_config({"thing": "foo"})
self.assertEqual(list(self.harness.charm._stored.things), ["foo"])
def test_action(self):
# the harness doesn't (yet!) help much with actions themselves
action_event = Mock(params={"fail": ""})
self.harness.charm._on_fortune_action(action_event)
self.assertTrue(action_event.set_results.called)
def test_action_fail(self):
action_event = Mock(params={"fail": "fail this"})
self.harness.charm._on_fortune_action(action_event)
self.assertEqual(action_event.fail.call_args, [("fail this",)])
def test_httpbin_pebble_ready(self):
# Check the initial Pebble plan is empty
initial_plan = self.harness.get_container_pebble_plan("httpbin")
self.assertEqual(initial_plan.to_yaml(), "{}\n")
# Expected plan after Pebble ready with default config
expected_plan = {
"services": {
"httpbin": {
"override": "replace",
"summary": "httpbin",
"command": "gunicorn -b 0.0.0.0:80 httpbin:app -k gevent",
"startup": "enabled",
"environment": {"thing": "🎁"},
}
},
}
# Get the httpbin container from the model
container = self.harness.model.unit.get_container("httpbin")
# Emit the PebbleReadyEvent carrying the httpbin container
self.harness.charm.on.httpbin_pebble_ready.emit(container)
# Get the plan now we've run PebbleReady
updated_plan = self.harness.get_container_pebble_plan("httpbin").to_dict()
# Check we've got the plan we expected
self.assertEqual(expected_plan, updated_plan)
# Check the service was started
service = self.harness.model.unit.get_container("httpbin").get_service("httpbin")
self.assertTrue(service.is_running())
# Ensure we set an ActiveStatus with no message
self.assertEqual(self.harness.model.unit.status, ActiveStatus())