openstack/sunbeam-charms
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Liam Young
2021-10-25 11:44:22 +01:00
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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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venv/
build/
.stestr/
*.charm
.tox
.coverage
__pycache__/
*.py[cod]

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/venv
*.py[cod]
*.charm

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

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# sunbeam-glance-operator
## 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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# sunbeam-glance-operator
## 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 liam
# 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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# 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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options:
debug:
default: False
description: Enable debug logging.
type: boolean
os-admin-hostname:
default: glance.juju
description: |
The hostname or address of the admin endpoints that should be advertised
in the glance image provider.
type: string
os-internal-hostname:
default: glance.juju
description: |
The hostname or address of the internal endpoints that should be advertised
in the glance image provider.
type: string
os-public-hostname:
default: glance.juju
description: |
The hostname or address of the internal endpoints that should be advertised
in the glance image provider.
type: string
region:
default: RegionOne
description: Space delimited list of OpenStack regions
type: string
ceph-osd-replication-count:
default: 3
type: int
description: |
This value dictates the number of replicas ceph must make of any
object it stores within the cinder rbd pool. Of course, this only
applies if using Ceph as a backend store. Note that once the cinder
rbd pool has been created, changing this value will not have any
effect (although it can be changed in ceph by manually configuring
your ceph cluster).
ceph-pool-weight:
type: int
default: 40
description: |
Defines a relative weighting of the pool as a percentage of the total
amount of data in the Ceph cluster. This effectively weights the number
of placement groups for the pool created to be appropriately portioned
to the amount of data expected. For example, if the ephemeral volumes
for the OpenStack compute instances are expected to take up 20% of the
overall configuration then this value would be specified as 20. Note -
it is important to choose an appropriate value for the pool weight as
this directly affects the number of placement groups which will be
created for the pool. The number of placement groups for a pool can
only be increased, never decreased - so it is important to identify the
percent of data that will likely reside in the pool.
volume-backend-name:
default:
type: string
description: |
Volume backend name for the backend. The default value is the
application name in the Juju model, e.g. "cinder-ceph-mybackend"
if it's deployed as `juju deploy cinder-ceph cinder-ceph-mybackend`.
A common backend name can be set to multiple backends with the
same characters so that those can be treated as a single virtual
backend associated with a single volume type.
backend-availability-zone:
default:
type: string
description: |
Availability zone name of this volume backend. If set, it will
override the default availability zone. Supported for Pike or
newer releases.
restrict-ceph-pools:
default: False
type: boolean
description: |
Optionally restrict Ceph key permissions to access pools as required.
rbd-pool-name:
default:
type: string
description: |
Optionally specify an existing rbd pool that cinder should map to.
rbd-flatten-volume-from-snapshot:
default:
type: boolean
default: False
description: |
Flatten volumes created from snapshots to remove dependency from
volume to snapshot. Supported on Queens+
rbd-mirroring-mode:
type: string
default: pool
description: |
The RBD mirroring mode used for the Ceph pool. This option is only used
with 'replicated' pool type, as it's not supported for 'erasure-coded'
pool type - valid values: 'pool' and 'image'
pool-type:
type: string
default: replicated
description: |
Ceph pool type to use for storage - valid values include ‘replicated’
and ‘erasure-coded’.
ec-profile-name:
type: string
default:
description: |
Name for the EC profile to be created for the EC pools. If not defined
a profile name will be generated based on the name of the pool used by
the application.
ec-rbd-metadata-pool:
type: string
default:
description: |
Name of the metadata pool to be created (for RBD use-cases). If not
defined a metadata pool name will be generated based on the name of
the data pool used by the application. The metadata pool is always
replicated, not erasure coded.
ec-profile-k:
type: int
default: 1
description: |
Number of data chunks that will be used for EC data pool. K+M factors
should never be greater than the number of available zones (or hosts)
for balancing.
ec-profile-m:
type: int
default: 2
description: |
Number of coding chunks that will be used for EC data pool. K+M factors
should never be greater than the number of available zones (or hosts)
for balancing.
ec-profile-locality:
type: int
default:
description: |
(lrc plugin - l) Group the coding and data chunks into sets of size l.
For instance, for k=4 and m=2, when l=3 two groups of three are created.
Each set can be recovered without reading chunks from another set. Note
that using the lrc plugin does incur more raw storage usage than isa or
jerasure in order to reduce the cost of recovery operations.
ec-profile-crush-locality:
type: string
default:
description: |
(lrc plugin) The type of the crush bucket in which each set of chunks
defined by l will be stored. For instance, if it is set to rack, each
group of l chunks will be placed in a different rack. It is used to
create a CRUSH rule step such as step choose rack. If it is not set,
no such grouping is done.
ec-profile-durability-estimator:
type: int
default:
description: |
(shec plugin - c) The number of parity chunks each of which includes
each data chunk in its calculation range. The number is used as a
durability estimator. For instance, if c=2, 2 OSDs can be down
without losing data.
ec-profile-helper-chunks:
type: int
default:
description: |
(clay plugin - d) Number of OSDs requested to send data during
recovery of a single chunk. d needs to be chosen such that
k+1 <= d <= k+m-1. Larger the d, the better the savings.
ec-profile-scalar-mds:
type: string
default:
description: |
(clay plugin) specifies the plugin that is used as a building
block in the layered construction. It can be one of jerasure,
isa, shec (defaults to jerasure).
ec-profile-plugin:
type: string
default: jerasure
description: |
EC plugin to use for this applications pool. The following list of
plugins acceptable - jerasure, lrc, isa, shec, clay.
ec-profile-technique:
type: string
default:
description: |
EC profile technique used for this applications pool - will be
validated based on the plugin configured via ec-profile-plugin.
Supported techniques are ‘reed_sol_van’, ‘reed_sol_r6_op’,
‘cauchy_orig’, ‘cauchy_good’, ‘liber8tion’ for jerasure,
‘reed_sol_van’, ‘cauchy’ for isa and ‘single’, ‘multiple’
for shec.
ec-profile-device-class:
type: string
default:
description: |
Device class from CRUSH map to use for placement groups for
erasure profile - valid values: ssd, hdd or nvme (or leave
unset to not use a device class).
bluestore-compression-algorithm:
type: string
default:
description: |
Compressor to use (if any) for pools requested by this charm.
.
NOTE: The ceph-osd charm sets a global default for this value (defaults
to 'lz4' unless configured by the end user) which will be used unless
specified for individual pools.
bluestore-compression-mode:
type: string
default:
description: |
Policy for using compression on pools requested by this charm.
.
'none' means never use compression.
'passive' means use compression when clients hint that data is
compressible.
'aggressive' means use compression unless clients hint that
data is not compressible.
'force' means use compression under all circumstances even if the clients
hint that the data is not compressible.
bluestore-compression-required-ratio:
type: float
default:
description: |
The ratio of the size of the data chunk after compression relative to the
original size must be at least this small in order to store the
compressed version on pools requested by this charm.
bluestore-compression-min-blob-size:
type: int
default:
description: |
Chunks smaller than this are never compressed on pools requested by
this charm.
bluestore-compression-min-blob-size-hdd:
type: int
default:
description: |
Value of bluestore compression min blob size for rotational media on
pools requested by this charm.
bluestore-compression-min-blob-size-ssd:
type: int
default:
description: |
Value of bluestore compression min blob size for solid state media on
pools requested by this charm.
bluestore-compression-max-blob-size:
type: int
default:
description: |
Chunks larger than this are broken into smaller blobs sizing bluestore
compression max blob size before being compressed on pools requested by
this charm.
bluestore-compression-max-blob-size-hdd:
type: int
default:
description: |
Value of bluestore compression max blob size for rotational media on
pools requested by this charm.
bluestore-compression-max-blob-size-ssd:
type: int
default:
description: |
Value of bluestore compression max blob size for solid state media on
pools requested by this charm.

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"""Library for the ingress relation.
This library contains the Requires and Provides classes for handling
the ingress interface.
Import `IngressRequires` in your charm, with two required options:
- "self" (the charm itself)
- config_dict
`config_dict` accepts the following keys:
- service-hostname (required)
- service-name (required)
- service-port (required)
- additional-hostnames
- limit-rps
- limit-whitelist
- max-body-size
- path-routes
- retry-errors
- rewrite-enabled
- rewrite-target
- service-namespace
- session-cookie-max-age
- tls-secret-name
See [the config section](https://charmhub.io/nginx-ingress-integrator/configure) for descriptions
of each, along with the required type.
As an example, add the following to `src/charm.py`:
```
from charms.nginx_ingress_integrator.v0.ingress import IngressRequires
# In your charm's `__init__` method.
self.ingress = IngressRequires(self, {"service-hostname": self.config["external_hostname"],
"service-name": self.app.name,
"service-port": 80})
# In your charm's `config-changed` handler.
self.ingress.update_config({"service-hostname": self.config["external_hostname"]})
```
And then add the following to `metadata.yaml`:
```
requires:
ingress:
interface: ingress
```
You _must_ register the IngressRequires class as part of the `__init__` method
rather than, for instance, a config-changed event handler. This is because
doing so won't get the current relation changed event, because it wasn't
registered to handle the event (because it wasn't created in `__init__` when
the event was fired).
"""
import logging
from ops.charm import CharmEvents
from ops.framework import EventBase, EventSource, Object
from ops.model import BlockedStatus
# The unique Charmhub library identifier, never change it
LIBID = "db0af4367506491c91663468fb5caa4c"
# Increment this major API version when introducing breaking changes
LIBAPI = 0
# Increment this PATCH version before using `charmcraft publish-lib` or reset
# to 0 if you are raising the major API version
LIBPATCH = 9
logger = logging.getLogger(__name__)
REQUIRED_INGRESS_RELATION_FIELDS = {
"service-hostname",
"service-name",
"service-port",
}
OPTIONAL_INGRESS_RELATION_FIELDS = {
"additional-hostnames",
"limit-rps",
"limit-whitelist",
"max-body-size",
"retry-errors",
"rewrite-target",
"rewrite-enabled",
"service-namespace",
"session-cookie-max-age",
"tls-secret-name",
"path-routes",
}
class IngressAvailableEvent(EventBase):
pass
class IngressCharmEvents(CharmEvents):
"""Custom charm events."""
ingress_available = EventSource(IngressAvailableEvent)
class IngressRequires(Object):
"""This class defines the functionality for the 'requires' side of the 'ingress' relation.
Hook events observed:
- relation-changed
"""
def __init__(self, charm, config_dict):
super().__init__(charm, "ingress")
self.framework.observe(charm.on["ingress"].relation_changed, self._on_relation_changed)
self.config_dict = config_dict
def _config_dict_errors(self, update_only=False):
"""Check our config dict for errors."""
blocked_message = "Error in ingress relation, check `juju debug-log`"
unknown = [
x
for x in self.config_dict
if x not in REQUIRED_INGRESS_RELATION_FIELDS | OPTIONAL_INGRESS_RELATION_FIELDS
]
if unknown:
logger.error(
"Ingress relation error, unknown key(s) in config dictionary found: %s",
", ".join(unknown),
)
self.model.unit.status = BlockedStatus(blocked_message)
return True
if not update_only:
missing = [x for x in REQUIRED_INGRESS_RELATION_FIELDS if x not in self.config_dict]
if missing:
logger.error(
"Ingress relation error, missing required key(s) in config dictionary: %s",
", ".join(missing),
)
self.model.unit.status = BlockedStatus(blocked_message)
return True
return False
def _on_relation_changed(self, event):
"""Handle the relation-changed event."""
# `self.unit` isn't available here, so use `self.model.unit`.
if self.model.unit.is_leader():
if self._config_dict_errors():
return
for key in self.config_dict:
event.relation.data[self.model.app][key] = str(self.config_dict[key])
def update_config(self, config_dict):
"""Allow for updates to relation."""
if self.model.unit.is_leader():
self.config_dict = config_dict
if self._config_dict_errors(update_only=True):
return
relation = self.model.get_relation("ingress")
if relation:
for key in self.config_dict:
relation.data[self.model.app][key] = str(self.config_dict[key])
class IngressProvides(Object):
"""This class defines the functionality for the 'provides' side of the 'ingress' relation.
Hook events observed:
- relation-changed
"""
def __init__(self, charm):
super().__init__(charm, "ingress")
# Observe the relation-changed hook event and bind
# self.on_relation_changed() to handle the event.
self.framework.observe(charm.on["ingress"].relation_changed, self._on_relation_changed)
self.charm = charm
def _on_relation_changed(self, event):
"""Handle a change to the ingress relation.
Confirm we have the fields we expect to receive."""
# `self.unit` isn't available here, so use `self.model.unit`.
if not self.model.unit.is_leader():
return
ingress_data = {
field: event.relation.data[event.app].get(field)
for field in REQUIRED_INGRESS_RELATION_FIELDS | OPTIONAL_INGRESS_RELATION_FIELDS
}
missing_fields = sorted(
[
field
for field in REQUIRED_INGRESS_RELATION_FIELDS
if ingress_data.get(field) is None
]
)
if missing_fields:
logger.error(
"Missing required data fields for ingress relation: {}".format(
", ".join(missing_fields)
)
)
self.model.unit.status = BlockedStatus(
"Missing fields for ingress: {}".format(", ".join(missing_fields))
)
# Create an event that our charm can use to decide it's okay to
# configure the ingress.
self.charm.on.ingress_available.emit()

193
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# Copyright 2021 Canonical Ltd.
# See LICENSE file for licensing details.
"""# KubernetesServicePatch Library.
This library is designed to enable developers to more simply patch the Kubernetes Service created
by Juju during the deployment of a sidecar charm. When sidecar charms are deployed, Juju creates a
service named after the application in the namespace (named after the Juju model). This service by
default contains a "placeholder" port, which is 65536/TCP.
When modifying the default set of resources managed by Juju, one must consider the lifecycle of the
charm. In this case, any modifications to the default service (created during deployment), will
be overwritten during a charm upgrade.
When intialised, this library binds a handler to the parent charm's `install` and `upgrade_charm`
events which applies the patch to the cluster. This should ensure that the service ports are
correct throughout the charm's life.
The constructor simply takes a reference to the parent charm, and a list of tuples that each define
a port for the service, where each tuple contains:
- a name for the port
- port for the service to listen on
- optionally: a targetPort for the service (the port in the container!)
## Getting Started
To get started using the library, you just need to fetch the library using `charmcraft`. **Note
that you also need to add `lightkube` and `lightkube-models` to your charm's `requirements.txt`.**
```shell
cd some-charm
charmcraft fetch-lib charms.observability_libs.v0.kubernetes_service_patch
echo <<-EOF >> requirements.txt
lightkube
lightkube-models
EOF
```
Then, to initialise the library:
```python
# ...
from charms.observability_libs.v0.kubernetes_service_patch import KubernetesServicePatch
class SomeCharm(CharmBase):
def __init__(self, *args):
# ...
self.service_patcher = KubernetesServicePatch(self, [(f"{self.app.name}", 8080)])
# ...
```
Additionally, you may wish to use mocks in your charm's unit testing to ensure that the library
does not try to make any API calls, or open any files during testing that are unlikely to be
present, and could break your tests. The easiest way to do this is during your test `setUp`:
```python
# ...
@patch("charm.KubernetesServicePatch", lambda x, y: None)
def setUp(self, *unused):
self.harness = Harness(SomeCharm)
# ...
```
"""
import logging
from types import MethodType
from typing import Sequence, Tuple, Union
from lightkube import ApiError, Client
from lightkube.models.core_v1 import ServicePort, ServiceSpec
from lightkube.models.meta_v1 import ObjectMeta
from lightkube.resources.core_v1 import Service
from lightkube.types import PatchType
from ops.charm import CharmBase
from ops.framework import Object
logger = logging.getLogger(__name__)
# The unique Charmhub library identifier, never change it
LIBID = "0042f86d0a874435adef581806cddbbb"
# Increment this major API version when introducing breaking changes
LIBAPI = 0
# Increment this PATCH version before using `charmcraft publish-lib` or reset
# to 0 if you are raising the major API version
LIBPATCH = 3
PortDefinition = Union[Tuple[str, int], Tuple[str, int, int]]
class KubernetesServicePatch(Object):
"""A utility for patching the Kubernetes service set up by Juju."""
def __init__(self, charm: CharmBase, ports: Sequence[PortDefinition]):
"""Constructor for KubernetesServicePatch.
Args:
charm: the charm that is instantiating the library.
ports: a list of tuples (name, port, targetPort) for every service port.
"""
super().__init__(charm, "kubernetes-service-patch")
self.charm = charm
self.service = self._service_object(ports)
# Make mypy type checking happy that self._patch is a method
assert isinstance(self._patch, MethodType)
# Ensure this patch is applied during the 'install' and 'upgrade-charm' events
self.framework.observe(charm.on.install, self._patch)
self.framework.observe(charm.on.upgrade_charm, self._patch)
def _service_object(self, ports: Sequence[PortDefinition]) -> Service:
"""Creates a valid Service representation for Alertmanager.
Args:
ports: a list of tuples of the form (name, port) or (name, port, targetPort) for every
service port. If the 'targetPort' is omitted, it is assumed to be equal to 'port'.
Returns:
Service: A valid representation of a Kubernetes Service with the correct ports.
"""
return Service(
apiVersion="v1",
kind="Service",
metadata=ObjectMeta(
namespace=self._namespace,
name=self._app,
labels={"app.kubernetes.io/name": self._app},
),
spec=ServiceSpec(
selector={"app.kubernetes.io/name": self._app},
ports=[
ServicePort(name=p[0], port=p[1], targetPort=p[2] if len(p) > 2 else p[1]) # type: ignore
for p in ports
],
),
)
def _patch(self, _) -> None:
"""Patch the Kubernetes service created by Juju to map the correct port.
Raises:
PatchFailed: if patching fails due to lack of permissions, or otherwise.
"""
if not self.charm.unit.is_leader():
return
client = Client()
try:
client.patch(Service, self._app, self.service, patch_type=PatchType.MERGE)
except ApiError as e:
if e.status.code == 403:
logger.error("Kubernetes service patch failed: `juju trust` this application.")
else:
logger.error("Kubernetes service patch failed: %s", str(e))
else:
logger.info("Kubernetes service '%s' patched successfully", self._app)
def is_patched(self) -> bool:
"""Reports if the service patch has been applied.
Returns:
bool: A boolean indicating if the service patch has been applied.
"""
client = Client()
# Get the relevant service from the cluster
service = client.get(Service, name=self._app, namespace=self._namespace)
# Construct a list of expected ports, should the patch be applied
expected_ports = [(p.port, p.targetPort) for p in self.service.spec.ports]
# Construct a list in the same manner, using the fetched service
fetched_ports = [(p.port, p.targetPort) for p in service.spec.ports]
return expected_ports == fetched_ports
@property
def _app(self) -> str:
"""Name of the current Juju application.
Returns:
str: A string containing the name of the current Juju application.
"""
return self.charm.app.name
@property
def _namespace(self) -> str:
"""The Kubernetes namespace we're running in.
Returns:
str: A string containing the name of the current Kubernetes namespace.
"""
with open("/var/run/secrets/kubernetes.io/serviceaccount/namespace", "r") as f:
return f.read().strip()

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"""IdentityServiceProvides and Requires module.
This library contains the Requires and Provides classes for handling
the identity_service interface.
Import `IdentityServiceRequires` in your charm, with the charm object and the
relation name:
- self
- "identity_service"
Also provide additional parameters to the charm object:
- service
- internal_url
- public_url
- admin_url
- region
- username
- vhost
Two events are also available to respond to:
- connected
- ready
- goneaway
A basic example showing the usage of this relation follows:
```
from charms.sunbeam_sunbeam_identity_service_operator.v0.identity_service import IdentityServiceRequires
class IdentityServiceClientCharm(CharmBase):
def __init__(self, *args):
super().__init__(*args)
# IdentityService Requires
self.identity_service = IdentityServiceRequires(
self, "identity_service",
service = "my-service"
internal_url = "http://internal-url"
public_url = "http://public-url"
admin_url = "http://admin-url"
region = "region"
)
self.framework.observe(
self.identity_service.on.connected, self._on_identity_service_connected)
self.framework.observe(
self.identity_service.on.ready, self._on_identity_service_ready)
self.framework.observe(
self.identity_service.on.goneaway, self._on_identity_service_goneaway)
def _on_identity_service_connected(self, event):
'''React to the IdentityService connected event.
This event happens when n IdentityService relation is added to the
model before credentials etc have been provided.
'''
# Do something before the relation is complete
pass
def _on_identity_service_ready(self, event):
'''React to the IdentityService ready event.
The IdentityService interface will use the provided config for the
request to the identity server.
'''
# IdentityService Relation is ready. Do something with the completed relation.
pass
def _on_identity_service_goneaway(self, event):
'''React to the IdentityService goneaway event.
This event happens when an IdentityService relation is removed.
'''
# IdentityService Relation has goneaway. shutdown services or suchlike
pass
```
"""
# The unique Charmhub library identifier, never change it
LIBID = "6a7cb19b98314ecf916e3fcb02708608"
# Increment this major API version when introducing breaking changes
LIBAPI = 0
# Increment this PATCH version before using `charmcraft publish-lib` or reset
# to 0 if you are raising the major API version
LIBPATCH = 1
import json
import logging
import requests
from ops.framework import (
StoredState,
EventBase,
ObjectEvents,
EventSource,
Object,
)
from ops.model import Relation
from typing import List
logger = logging.getLogger(__name__)
class IdentityServiceConnectedEvent(EventBase):
"""IdentityService connected Event."""
pass
class IdentityServiceReadyEvent(EventBase):
"""IdentityService ready for use Event."""
pass
class IdentityServiceGoneAwayEvent(EventBase):
"""IdentityService relation has gone-away Event"""
pass
class IdentityServiceServerEvents(ObjectEvents):
"""Events class for `on`"""
connected = EventSource(IdentityServiceConnectedEvent)
ready = EventSource(IdentityServiceReadyEvent)
goneaway = EventSource(IdentityServiceGoneAwayEvent)
class IdentityServiceRequires(Object):
"""
IdentityServiceRequires class
"""
on = IdentityServiceServerEvents()
_stored = StoredState()
def __init__(self, charm, relation_name: str, service_endpoints: dict,
region: str):
super().__init__(charm, relation_name)
self.charm = charm
self.relation_name = relation_name
self.service_endpoints = service_endpoints
self.region = region
self.framework.observe(
self.charm.on[relation_name].relation_joined,
self._on_identity_service_relation_joined,
)
self.framework.observe(
self.charm.on[relation_name].relation_changed,
self._on_identity_service_relation_changed,
)
self.framework.observe(
self.charm.on[relation_name].relation_departed,
self._on_identity_service_relation_changed,
)
self.framework.observe(
self.charm.on[relation_name].relation_broken,
self._on_identity_service_relation_broken,
)
def _on_identity_service_relation_joined(self, event):
"""IdentityService relation joined."""
logging.debug("IdentityService on_joined")
self.on.connected.emit()
self.register_services(
self.service_endpoints,
self.region)
def _on_identity_service_relation_changed(self, event):
"""IdentityService relation changed."""
logging.debug("IdentityService on_changed")
try:
self.service_password
self.on.ready.emit()
except AttributeError:
pass
def _on_identity_service_relation_broken(self, event):
"""IdentityService relation broken."""
logging.debug("IdentityService on_broken")
self.on.goneaway.emit()
@property
def _identity_service_rel(self) -> Relation:
"""The IdentityService relation."""
return self.framework.model.get_relation(self.relation_name)
def get_remote_app_data(self, key: str) -> str:
"""Return the value for the given key from remote app data."""
data = self._identity_service_rel.data[self._identity_service_rel.app]
return data.get(key)
@property
def api_version(self) -> str:
"""Return the api_version."""
return self.get_remote_app_data('api-version')
@property
def auth_host(self) -> str:
"""Return the auth_host."""
return self.get_remote_app_data('auth-host')
@property
def auth_port(self) -> str:
"""Return the auth_port."""
return self.get_remote_app_data('auth-port')
@property
def auth_protocol(self) -> str:
"""Return the auth_protocol."""
return self.get_remote_app_data('auth-protocol')
@property
def internal_host(self) -> str:
"""Return the internal_host."""
return self.get_remote_app_data('internal-host')
@property
def internal_port(self) -> str:
"""Return the internal_port."""
return self.get_remote_app_data('internal-port')
@property
def internal_protocol(self) -> str:
"""Return the internal_protocol."""
return self.get_remote_app_data('internal-protocol')
@property
def admin_domain_name(self) -> str:
"""Return the admin_domain_name."""
return self.get_remote_app_data('admin-domain-name')
@property
def admin_domain_id(self) -> str:
"""Return the admin_domain_id."""
return self.get_remote_app_data('admin-domain-id')
@property
def admin_project_name(self) -> str:
"""Return the admin_project_name."""
return self.get_remote_app_data('admin-project-name')
@property
def admin_project_id(self) -> str:
"""Return the admin_project_id."""
return self.get_remote_app_data('admin-project-id')
@property
def admin_user_name(self) -> str:
"""Return the admin_user_name."""
return self.get_remote_app_data('admin-user-name')
@property
def admin_user_id(self) -> str:
"""Return the admin_user_id."""
return self.get_remote_app_data('admin-user-id')
@property
def service_domain_name(self) -> str:
"""Return the service_domain_name."""
return self.get_remote_app_data('service-domain-name')
@property
def service_domain_id(self) -> str:
"""Return the service_domain_id."""
return self.get_remote_app_data('service-domain-id')
@property
def service_host(self) -> str:
"""Return the service_host."""
return self.get_remote_app_data('service-host')
@property
def service_password(self) -> str:
"""Return the service_password."""
return self.get_remote_app_data('service-password')
@property
def service_port(self) -> str:
"""Return the service_port."""
return self.get_remote_app_data('service-port')
@property
def service_protocol(self) -> str:
"""Return the service_protocol."""
return self.get_remote_app_data('service-protocol')
@property
def service_project_name(self) -> str:
"""Return the service_project_name."""
return self.get_remote_app_data('service-project-name')
@property
def service_project_id(self) -> str:
"""Return the service_project_id."""
return self.get_remote_app_data('service-project-id')
@property
def service_user_name(self) -> str:
"""Return the service_user_name."""
return self.get_remote_app_data('service-user-name')
@property
def service_user_id(self) -> str:
"""Return the service_user_id."""
return self.get_remote_app_data('service-user-id')
def register_services(self, service_endpoints: dict,
region: str) -> None:
"""Request access to the IdentityService server."""
if self.model.unit.is_leader():
logging.debug("Requesting service registration")
app_data = self._identity_service_rel.data[self.charm.app]
app_data["service-endpoints"] = json.dumps(service_endpoints)
app_data["region"] = region
class HasIdentityServiceClientsEvent(EventBase):
"""Has IdentityServiceClients Event."""
pass
class ReadyIdentityServiceClientsEvent(EventBase):
"""IdentityServiceClients Ready Event."""
def __init__(self, handle, relation_id, relation_name, service_endpoints,
region, client_app_name):
super().__init__(handle)
self.relation_id = relation_id
self.relation_name = relation_name
self.service_endpoints = service_endpoints
self.region = region
self.client_app_name = client_app_name
def snapshot(self):
return {
"relation_id": self.relation_id,
"relation_name": self.relation_name,
"service_endpoints": self.service_endpoints,
"client_app_name": self.client_app_name,
"region": self.region}
def restore(self, snapshot):
super().restore(snapshot)
self.relation_id = snapshot["relation_id"]
self.relation_name = snapshot["relation_name"]
self.service_endpoints = snapshot["service_endpoints"]
self.region = snapshot["region"]
self.client_app_name = snapshot["client_app_name"]
class IdentityServiceClientEvents(ObjectEvents):
"""Events class for `on`"""
has_identity_service_clients = EventSource(HasIdentityServiceClientsEvent)
ready_identity_service_clients = EventSource(ReadyIdentityServiceClientsEvent)
class IdentityServiceProvides(Object):
"""
IdentityServiceProvides class
"""
on = IdentityServiceClientEvents()
_stored = StoredState()
def __init__(self, charm, relation_name):
super().__init__(charm, relation_name)
self.charm = charm
self.relation_name = relation_name
self.framework.observe(
self.charm.on[relation_name].relation_joined,
self._on_identity_service_relation_joined,
)
self.framework.observe(
self.charm.on[relation_name].relation_changed,
self._on_identity_service_relation_changed,
)
self.framework.observe(
self.charm.on[relation_name].relation_broken,
self._on_identity_service_relation_broken,
)
def _on_identity_service_relation_joined(self, event):
"""Handle IdentityService joined."""
logging.debug("IdentityService on_joined")
self.on.has_identity_service_clients.emit()
def _on_identity_service_relation_changed(self, event):
"""Handle IdentityService changed."""
logging.debug("IdentityService on_changed")
REQUIRED_KEYS = [
'service-endpoints',
'region']
values = [
event.relation.data[event.relation.app].get(k)
for k in REQUIRED_KEYS ]
# Validate data on the relation
if all(values):
print(event.relation.id)
print(event.relation.name)
service_eps = json.loads(
event.relation.data[event.relation.app]['service-endpoints'])
self.on.ready_identity_service_clients.emit(
event.relation.id,
event.relation.name,
service_eps,
event.relation.data[event.relation.app]['region'],
event.relation.app.name)
def _on_identity_service_relation_broken(self, event):
"""Handle IdentityService broken."""
logging.debug("IdentityServiceProvides on_departed")
# TODO clear data on the relation
def set_identity_service_credentials(self, relation_name: int,
relation_id: str,
api_version: str,
auth_host: str,
auth_port: str,
auth_protocol: str,
internal_host: str,
internal_port: str,
internal_protocol: str,
service_host: str,
service_port: str,
service_protocol: str,
admin_domain: str,
admin_project: str,
admin_user: str,
service_domain: str,
service_password: str,
service_project: str,
service_user: str):
logging.debug("Setting identity_service connection information.")
for relation in self.framework.model.relations[relation_name]:
if relation.id == relation_id:
_identity_service_rel = relation
app_data = _identity_service_rel.data[self.charm.app]
app_data["api-version"] = api_version
app_data["auth-host"] = auth_host
app_data["auth-port"] = str(auth_port)
app_data["auth-protocol"] = auth_protocol
app_data["internal-host"] = internal_host
app_data["internal-port"] = str(internal_port)
app_data["internal-protocol"] = internal_protocol
app_data["service-host"] = service_host
app_data["service-port"] = str(service_port)
app_data["service-protocol"] = service_protocol
app_data["admin-domain-name"] = admin_domain.name
app_data["admin-domain-id"] = admin_domain.id
app_data["admin-project-name"] = admin_project.name
app_data["admin-project-id"] = admin_project.id
app_data["admin-user-name"] = admin_user.name
app_data["admin-user-id"] = admin_user.id
app_data["service-domain-name"] = service_domain.name
app_data["service-domain-id"] = service_domain.id
app_data["service-project-name"] = service_project.name
app_data["service-project-id"] = service_project.id
app_data["service-user-name"] = service_user.name
app_data["service-user-id"] = service_user.id
app_data["service-password"] = service_password

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"""
## Overview
This document explains how to integrate with the MySQL charm for the purposes of consuming a mysql database. It also explains how alternative implementations of the MySQL charm may maintain the same interface and be backward compatible with all currently integrated charms. Finally this document is the authoritative reference on the structure of relation data that is shared between MySQL charms and any other charm that intends to use the database.
## Consumer Library Usage
The MySQL charm library uses the [Provider and Consumer](https://ops.readthedocs.io/en/latest/#module-ops.relation) objects from the Operator Framework. Charms that would like to use a MySQL database must use the `MySQLConsumer` object from the charm library. Using the `MySQLConsumer` object requires instantiating it, typically in the constructor of your charm. The `MySQLConsumer` constructor requires the name of the relation over which a database will be used. This relation must use the `mysql_datastore` interface. In addition the constructor also requires a `consumes` specification, which is a dictionary with key `mysql` (also see Provider Library Usage below) and a value that represents the minimum acceptable version of MySQL. This version string can be in any format that is compatible with the Python [Semantic Version module](https://pypi.org/project/semantic-version/). For example, assuming your charm consumes a database over a rlation named "monitoring", you may instantiate `MySQLConsumer` as follows:
from charms.mysql_k8s.v0.mysql import MySQLConsumer
def __init__(self, *args):
super().__init__(*args)
...
self.mysql_consumer = MySQLConsumer(
self, "monitoring", {"mysql": ">=8"}
)
...
This example hard codes the consumes dictionary argument containing the minimal MySQL version required, however you may want to consider generating this dictionary by some other means, such as a `self.consumes` property in your charm. This is because the minimum required MySQL version may change when you upgrade your charm. Of course it is expected that you will keep this version string updated as you develop newer releases of your charm. If the version string can be determined at run time by inspecting the actual deployed version of your charmed application, this would be ideal.
An instantiated `MySQLConsumer` object may be used to request new databases using the `new_database()` method. This method requires no arguments unless you require multiple databases. If multiple databases are requested, you must provide a unique `name_suffix` argument. For example:
def _on_database_relation_joined(self, event):
self.mysql_consumer.new_database(name_suffix="db1")
self.mysql_consumer.new_database(name_suffix="db2")
The `address`, `port`, `databases`, and `credentials` methods can all be called
to get the relevant information from the relation data.
"""
# !/usr/bin/env python3
# Copyright 2021 Canonical Ltd.
# See LICENSE file for licensing details.
import json
import uuid
import logging
from ops.relation import ConsumerBase
from ops.framework import (
StoredState,
EventBase,
ObjectEvents,
EventSource,
Object,
)
# The unique Charmhub library identifier, never change it
LIBID = "1fdc567d7095465990dc1f9be80461fd"
# Increment this major API version when introducing breaking changes
LIBAPI = 0
# Increment this PATCH version before using `charmcraft publish-lib` or reset
# to 0 if you are raising the major API version
LIBPATCH = 1
logger = logging.getLogger(__name__)
class DatabaseConnectedEvent(EventBase):
"""Database connected Event."""
pass
class DatabaseReadyEvent(EventBase):
"""Database ready for use Event."""
pass
class DatabaseGoneAwayEvent(EventBase):
"""Database relation has gone-away Event"""
pass
class DatabaseServerEvents(ObjectEvents):
"""Events class for `on`"""
connected = EventSource(DatabaseConnectedEvent)
ready = EventSource(DatabaseReadyEvent)
goneaway = EventSource(DatabaseGoneAwayEvent)
class MySQLConsumer(Object):
"""
MySQLConsumer lib class
"""
on = DatabaseServerEvents()
def __init__(self, charm, relation_name: str, databases: list):
super().__init__(charm, relation_name)
self.charm = charm
self.relation_name = relation_name
self.request_databases = databases
self.framework.observe(
self.charm.on[relation_name].relation_joined,
self._on_database_relation_joined,
)
def _on_database_relation_joined(self, event):
"""AMQP relation joined."""
logging.debug("DatabaseRequires on_joined")
self.on.connected.emit()
self.request_access(self.request_databases)
def databases(self, rel_id=None) -> list:
"""
List of currently available databases
Returns:
list: list of database names
"""
rel = self.framework.model.get_relation(self.relation_name, rel_id)
relation_data = rel.data[rel.app]
dbs = relation_data.get("databases")
databases = json.loads(dbs) if dbs else []
return databases
def credentials(self, rel_id=None) -> dict:
"""
Dictionary of credential information to access databases
Returns:
dict: dictionary of credential information including username,
password and address
"""
rel = self.framework.model.get_relation(self.relation_name, rel_id)
relation_data = rel.data[rel.app]
data = relation_data.get("data")
data = json.loads(data) if data else {}
credentials = data.get("credentials")
return credentials
def new_database(self, rel_id=None, name_suffix=""):
"""
Request creation of an additional database
"""
if not self.charm.unit.is_leader():
return
rel = self.framework.model.get_relation(self.relation_name, rel_id)
if name_suffix:
name_suffix = "_{}".format(name_suffix)
rid = str(uuid.uuid4()).split("-")[-1]
db_name = "db_{}_{}_{}".format(rel.id, rid, name_suffix)
logger.debug("CLIENT REQUEST %s", db_name)
rel_data = rel.data[self.charm.app]
dbs = rel_data.get("databases")
dbs = json.loads(dbs) if dbs else []
dbs.append(db_name)
rel.data[self.charm.app]["databases"] = json.dumps(dbs)
def request_access(self, databases: list) -> None:
"""Request access to the AMQP server."""
if self.model.unit.is_leader():
logging.debug("Requesting AMQP user and vhost")
if databases:
rel = self.framework.model.get_relation(self.relation_name)
rel.data[self.charm.app]["databases"] = json.dumps(databases)

314
charms/glance-k8s/lib/charms/sunbeam_rabbitmq_operator/v0/amqp.py Normal file
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"""AMQPProvides and Requires module.
This library contains the Requires and Provides classes for handling
the amqp interface.
Import `AMQPRequires` in your charm, with the charm object and the
relation name:
- self
- "amqp"
Also provide two additional parameters to the charm object:
- username
- vhost
Two events are also available to respond to:
- connected
- ready
- goneaway
A basic example showing the usage of this relation follows:
```
from charms.sunbeam_rabbitmq_operator.v0.amqp import AMQPRequires
class AMQPClientCharm(CharmBase):
def __init__(self, *args):
super().__init__(*args)
# AMQP Requires
self.amqp = AMQPRequires(
self, "amqp",
username="myusername",
vhost="vhostname"
)
self.framework.observe(
self.amqp.on.connected, self._on_amqp_connected)
self.framework.observe(
self.amqp.on.ready, self._on_amqp_ready)
self.framework.observe(
self.amqp.on.goneaway, self._on_amqp_goneaway)
def _on_amqp_connected(self, event):
'''React to the AMQP connected event.
This event happens when n AMQP relation is added to the
model before credentials etc have been provided.
'''
# Do something before the relation is complete
pass
def _on_amqp_ready(self, event):
'''React to the AMQP ready event.
The AMQP interface will use the provided username and vhost for the
request to the rabbitmq server.
'''
# AMQP Relation is ready. Do something with the completed relation.
pass
def _on_amqp_goneaway(self, event):
'''React to the AMQP goneaway event.
This event happens when an AMQP relation is removed.
'''
# AMQP Relation has goneaway. shutdown services or suchlike
pass
```
"""
# The unique Charmhub library identifier, never change it
LIBID = "ab1414b6baf044f099caf9c117f1a101"
# Increment this major API version when introducing breaking changes
LIBAPI = 0
# Increment this PATCH version before using `charmcraft publish-lib` or reset
# to 0 if you are raising the major API version
LIBPATCH = 3
import logging
import requests
from ops.framework import (
StoredState,
EventBase,
ObjectEvents,
EventSource,
Object,
)
from ops.model import Relation
from typing import List
logger = logging.getLogger(__name__)
class AMQPConnectedEvent(EventBase):
"""AMQP connected Event."""
pass
class AMQPReadyEvent(EventBase):
"""AMQP ready for use Event."""
pass
class AMQPGoneAwayEvent(EventBase):
"""AMQP relation has gone-away Event"""
pass
class AMQPServerEvents(ObjectEvents):
"""Events class for `on`"""
connected = EventSource(AMQPConnectedEvent)
ready = EventSource(AMQPReadyEvent)
goneaway = EventSource(AMQPGoneAwayEvent)
class AMQPRequires(Object):
"""
AMQPRequires class
"""
on = AMQPServerEvents()
_stored = StoredState()
def __init__(self, charm, relation_name: str, username: str, vhost: str):
super().__init__(charm, relation_name)
self.charm = charm
self.relation_name = relation_name
self.username = username
self.vhost = vhost
self.framework.observe(
self.charm.on[relation_name].relation_joined,
self._on_amqp_relation_joined,
)
self.framework.observe(
self.charm.on[relation_name].relation_changed,
self._on_amqp_relation_changed,
)
self.framework.observe(
self.charm.on[relation_name].relation_departed,
self._on_amqp_relation_changed,
)
self.framework.observe(
self.charm.on[relation_name].relation_broken,
self._on_amqp_relation_broken,
)
def _on_amqp_relation_joined(self, event):
"""AMQP relation joined."""
logging.debug("RabbitMQAMQPRequires on_joined")
self.on.connected.emit()
self.request_access(self.username, self.vhost)
def _on_amqp_relation_changed(self, event):
"""AMQP relation changed."""
logging.debug("RabbitMQAMQPRequires on_changed")
if self.password:
self.on.ready.emit()
def _on_amqp_relation_broken(self, event):
"""AMQP relation broken."""
logging.debug("RabbitMQAMQPRequires on_broken")
self.on.goneaway.emit()
@property
def _amqp_rel(self) -> Relation:
"""The AMQP relation."""
return self.framework.model.get_relation(self.relation_name)
@property
def password(self) -> str:
"""Return the AMQP password from the server side of the relation."""
return self._amqp_rel.data[self._amqp_rel.app].get("password")
@property
def hostname(self) -> str:
"""Return the hostname from the AMQP relation"""
return self._amqp_rel.data[self._amqp_rel.app].get("hostname")
@property
def ssl_port(self) -> str:
"""Return the SSL port from the AMQP relation"""
return self._amqp_rel.data[self._amqp_rel.app].get("ssl_port")
@property
def ssl_ca(self) -> str:
"""Return the SSL port from the AMQP relation"""
return self._amqp_rel.data[self._amqp_rel.app].get("ssl_ca")
@property
def hostnames(self) -> List[str]:
"""Return a list of remote RMQ hosts from the AMQP relation"""
_hosts = []
for unit in self._amqp_rel.units:
_hosts.append(self._amqp_rel.data[unit].get("ingress-address"))
return _hosts
def request_access(self, username: str, vhost: str) -> None:
"""Request access to the AMQP server."""
if self.model.unit.is_leader():
logging.debug("Requesting AMQP user and vhost")
self._amqp_rel.data[self.charm.app]["username"] = username
self._amqp_rel.data[self.charm.app]["vhost"] = vhost
class HasAMQPClientsEvent(EventBase):
"""Has AMQPClients Event."""
pass
class ReadyAMQPClientsEvent(EventBase):
"""AMQPClients Ready Event."""
pass
class AMQPClientEvents(ObjectEvents):
"""Events class for `on`"""
has_amqp_clients = EventSource(HasAMQPClientsEvent)
ready_amqp_clients = EventSource(ReadyAMQPClientsEvent)
class AMQPProvides(Object):
"""
AMQPProvides class
"""
on = AMQPClientEvents()
_stored = StoredState()
def __init__(self, charm, relation_name):
super().__init__(charm, relation_name)
self.charm = charm
self.relation_name = relation_name
self.framework.observe(
self.charm.on[relation_name].relation_joined,
self._on_amqp_relation_joined,
)
self.framework.observe(
self.charm.on[relation_name].relation_changed,
self._on_amqp_relation_changed,
)
self.framework.observe(
self.charm.on[relation_name].relation_broken,
self._on_amqp_relation_broken,
)
def _on_amqp_relation_joined(self, event):
"""Handle AMQP joined."""
logging.debug("RabbitMQAMQPProvides on_joined")
self.on.has_amqp_clients.emit()
def _on_amqp_relation_changed(self, event):
"""Handle AMQP changed."""
logging.debug("RabbitMQAMQPProvides on_changed")
# Validate data on the relation
if self.username(event) and self.vhost(event):
self.on.ready_amqp_clients.emit()
if self.charm.unit.is_leader():
self.set_amqp_credentials(
event, self.username(event), self.vhost(event)
)
def _on_amqp_relation_broken(self, event):
"""Handle AMQP broken."""
logging.debug("RabbitMQAMQPProvides on_departed")
# TODO clear data on the relation
def username(self, event):
"""Return the AMQP username from the client side of the relation."""
return event.relation.data[event.relation.app].get("username")
def vhost(self, event):
"""Return the AMQP vhost from the client side of the relation."""
return event.relation.data[event.relation.app].get("vhost")
def set_amqp_credentials(self, event, username, vhost):
"""Set AMQP Credentials.
:param event: The current event
:type EventsBase
:param username: The requested username
:type username: str
:param vhost: The requested vhost
:type vhost: str
:returns: None
:rtype: None
"""
# TODO: Can we move this into the charm code?
# TODO TLS Support. Existing interfaces set ssl_port and ssl_ca
logging.debug("Setting amqp connection information.")
try:
if not self.charm.does_vhost_exist(vhost):
self.charm.create_vhost(vhost)
password = self.charm.create_user(username)
self.charm.set_user_permissions(username, vhost)
event.relation.data[self.charm.app]["password"] = password
event.relation.data[self.charm.app][
"hostname"
] = self.charm.hostname
except requests.exceptions.ConnectionError as e:
logging.warning(
"Rabbitmq is not ready. Defering. Errno: {}".format(e.errno)
)
event.defer()

48
charms/glance-k8s/metadata.yaml Normal file
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# Copyright 2021 Canonical Ltd
# See LICENSE file for licensing details.
name: sunbeam-glance-operator
maintainer: OpenStack Charmers <openstack-charmers@lists.ubuntu.com>
summary: OpenStack Image Registry and Delivery Service
description: |
The Glance project provides an image registration and discovery service
and an image delivery service. These services are used in conjunction
by Nova to deliver images from object stores, such as OpenStack's Swift
service, to Nova's compute nodes.
version: 3
bases:
- name: ubuntu
channel: 20.04/stable
tags:
- openstack
- storage
- misc
containers:
glance-api:
resource: glance-api-image
resources:
glance-api-image:
type: oci-image
description: OCI image for OpenStack Glance (kolla/glance-api-image)
requires:
shared-db:
interface: mysql_datastore
limit: 1
ingress:
interface: ingress
identity-service:
interface: keystone
limit: 1
amqp:
interface: rabbitmq
image-service:
interface: glance
ceph:
interface: ceph-client
peers:
peers:
interface: glance-peer

8
charms/glance-k8s/requirements.txt Normal file
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@@ -0,0 +1,8 @@
# ops >= 1.2.0
jinja2
git+https://github.com/canonical/operator@2875e73e#egg=ops
git+https://opendev.org/openstack/charm-ops-openstack#egg=ops_openstack
git+https://github.com/openstack-charmers/advanced-sunbeam-openstack#egg=advanced_sunbeam_openstack
lightkube
git+https://github.com/openstack/charm-ops-interface-ceph-client#egg=interface_ceph_client
git+https://github.com/juju/charm-helpers.git#egg=charmhelpers

17
charms/glance-k8s/run_tests Executable file
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@@ -0,0 +1,17 @@
#!/bin/sh -e
# Copyright 2021 liam
# See LICENSE file for licensing details.
if [ -z "$VIRTUAL_ENV" -a -d venv/ ]; then
. venv/bin/activate
fi
if [ -z "$PYTHONPATH" ]; then
export PYTHONPATH="lib:src"
else
export PYTHONPATH="lib:src:$PYTHONPATH"
fi
flake8
coverage run --branch --source=src -m unittest -v "$@"
coverage report -m

182
charms/glance-k8s/src/charm.py Executable file
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@@ -0,0 +1,182 @@
#!/usr/bin/env python3
"""Glance Operator Charm.
This charm provide Glance services as part of an OpenStack deployment
"""
import logging
from typing import List
from ops.framework import StoredState
from ops.main import main
import advanced_sunbeam_openstack.cprocess as sunbeam_cprocess
import advanced_sunbeam_openstack.charm as sunbeam_charm
import advanced_sunbeam_openstack.core as sunbeam_core
import advanced_sunbeam_openstack.relation_handlers as sunbeam_rhandlers
import advanced_sunbeam_openstack.config_contexts as sunbeam_ctxts
from charms.observability_libs.v0.kubernetes_service_patch \
import KubernetesServicePatch
logger = logging.getLogger(__name__)
class GlanceOperatorCharm(sunbeam_charm.OSBaseOperatorAPICharm):
"""Charm the service."""
ceph_conf = "/etc/ceph/ceph.conf"
_state = StoredState()
_authed = False
service_name = "glance-api"
wsgi_admin_script = '/usr/bin/glance-wsgi-api'
wsgi_public_script = '/usr/bin/glance-wsgi-api'
def __init__(self, framework):
super().__init__(framework)
self.service_patcher = KubernetesServicePatch(
self,
[
('public', self.default_public_ingress_port),
]
)
@property
def config_contexts(self) -> List[sunbeam_ctxts.ConfigContext]:
"""Configuration contexts for the operator."""
contexts = super().config_contexts
contexts.append(
sunbeam_ctxts.CephConfigurationContext(self, "ceph_config"))
contexts.append(
sunbeam_ctxts.CinderCephConfigurationContext(self, "cinder_ceph"))
return contexts
@property
def container_configs(self) -> List[sunbeam_core.ContainerConfigFile]:
"""Container configurations for the operator."""
_cconfigs = super().container_configs
_cconfigs.extend(
[
sunbeam_core.ContainerConfigFile(
[self.service_name],
self.ceph_conf,
self.service_user,
self.service_group,
),
]
)
return _cconfigs
def get_relation_handlers(self) -> List[sunbeam_rhandlers.RelationHandler]:
"""Relation handlers for the service."""
handlers = super().get_relation_handlers()
self.ceph = sunbeam_rhandlers.CephClientHandler(
self,
"ceph",
self.configure_charm,
allow_ec_overwrites=True,
app_name='rbd'
)
handlers.append(self.ceph)
return handlers
@property
def service_conf(self) -> str:
"""Service default configuration file."""
return f"/etc/glance/glance-api.conf"
@property
def service_user(self) -> str:
"""Service user file and directory ownership."""
return 'glance'
@property
def service_group(self) -> str:
"""Service group file and directory ownership."""
return 'glance'
@property
def service_endpoints(self):
return [
{
'service_name': 'glance',
'type': 'image',
'description': "OpenStack Image",
'internal_url': f'{self.internal_url}',
'public_url': f'{self.public_url}',
'admin_url': f'{self.admin_url}'}]
@property
def default_public_ingress_port(self):
return 9292
def _do_bootstrap(self):
"""
Starts the appropriate services in the order they are needed.
If the service has not yet been bootstrapped, then this will
1. Create the database
"""
super()._do_bootstrap()
try:
container = self.unit.get_container(self.wsgi_container_name)
logger.info("Syncing database...")
out = sunbeam_cprocess.check_output(
container,
[
'sudo', '-u', 'glance',
'glance-manage', '--config-dir',
'/etc/glance', 'db', 'sync'],
service_name='keystone-db-sync',
timeout=180)
logging.debug(f'Output from database sync: \n{out}')
except sunbeam_cprocess.ContainerProcessError:
logger.exception('Failed to bootstrap')
self._state.bootstrapped = False
return
def configure_charm(self, event) -> None:
"""Catchall handler to cconfigure charm services."""
if not self.relation_handlers_ready():
logging.debug("Defering configuration, charm relations not ready")
return
for ph in self.pebble_handlers:
if ph.pebble_ready:
container = self.unit.get_container(
ph.container_name
)
sunbeam_cprocess.check_call(
container,
['apt', 'update'])
sunbeam_cprocess.check_call(
container,
['apt', 'install', '-y', 'ceph-common'])
try:
sunbeam_cprocess.check_call(
container,
['ceph-authtool',
f'/etc/ceph/ceph.client.{self.app.name}.keyring',
'--create-keyring',
f'--name=client.{self.app.name}',
f'--add-key={self.ceph.key}']
)
except sunbeam_cprocess.ContainerProcessError:
pass
ph.init_service(self.contexts())
super().configure_charm(event)
# Restarting services after bootstrap should be in aso
if self._state.bootstrapped:
for handler in self.pebble_handlers:
handler.start_service()
class GlanceWallabyOperatorCharm(GlanceOperatorCharm):
openstack_release = 'wallaby'
if __name__ == "__main__":
# Note: use_juju_for_storage=True required per
# https://github.com/canonical/operator/issues/506
main(GlanceWallabyOperatorCharm, use_juju_for_storage=True)

22
charms/glance-k8s/src/templates/ceph.conf.j2 Normal file
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@@ -0,0 +1,22 @@
###############################################################################
# [ WARNING ]
# ceph configuration file maintained in aso
# local changes may be overwritten.
###############################################################################
[global]
{% if ceph.auth -%}
auth_supported = {{ ceph.auth }}
mon host = {{ ceph.mon_hosts }}
{% endif -%}
keyring = /etc/ceph/$cluster.$name.keyring
log to syslog = false
err to syslog = false
clog to syslog = false
{% if ceph.rbd_features %}
rbd default features = {{ ceph.rbd_features }}
{% endif %}
[client]
{% if ceph_config.rbd_default_data_pool -%}
rbd default data pool = {{ ceph_config.rbd_default_data_pool }}
{% endif %}

26
charms/glance-k8s/src/templates/cinder.conf.j2 Normal file
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@@ -0,0 +1,26 @@
###############################################################################
# [ WARNING ]
# cinder configuration file maintained by Juju
# local changes may be overwritten.
###############################################################################
[DEFAULT]
rootwrap_config = /etc/cinder/rootwrap.conf
api_paste_confg = /etc/cinder/api-paste.ini
debug = {{ options.debug }}
transport_url = {{ amqp.transport_url }}
auth_strategy = keystone
{% include "parts/section-database" %}
[keystone_authtoken]
www_authenticate_uri = {{ identity_service.internal_protocol }}://{{ identity_service.internal_host }}:{{ identity_service.internal_port }}
auth_url = {{ identity_service.internal_protocol }}://{{ identity_service.internal_host }}:{{ identity_service.internal_port }}
auth_type = password
project_domain_name = {{ identity_service.service_domain_name }}
user_domain_name = {{ identity_service.service_domain_name }}
project_name = {{ identity_service.service_project_name }}
username = {{ identity_service.service_user_name }}
password = {{ identity_service.service_password }}
[oslo_concurrency]
lock_path = /var/lib/cinder/tmp

28
charms/glance-k8s/src/templates/glance-api.conf.j2 Normal file
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@@ -0,0 +1,28 @@
###############################################################################
# [ WARNING ]
# glance configuration file maintained by Juju
# local changes may be overwritten.
###############################################################################
[DEFAULT]
debug = {{ options.debug }}
transport_url = {{ amqp.transport_url }}
{% include "parts/section-database" %}
{% include "parts/section-identity" %}
[glance_store]
default_backend = ceph
filesystem_store_datadir = /var/lib/glance/images/
[ceph]
rbd_store_chunk_size = 8
rbd_store_pool = glance
rbd_store_user = glance
rados_connect_timeout = 0
rbd_store_ceph_conf = /etc/ceph/ceph.conf
[paste_deploy]
flavor = keystone

7
charms/glance-k8s/src/templates/parts/section-database Normal file
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@@ -0,0 +1,7 @@
[database]
{% if shared_db.database_host -%}
connection = {{ shared_db.database_type }}://{{ shared_db.database_user }}:{{ shared_db.database_password }}@{{ shared_db.database_host }}/{{ shared_db.database }}{% if shared_db.database_ssl_ca %}?ssl_ca={{ shared_db.database_ssl_ca }}{% if shared_db.database_ssl_cert %}&ssl_cert={{ shared_db.database_ssl_cert }}&ssl_key={{ shared_db.database_ssl_key }}{% endif %}{% endif %}
{% else -%}
connection = sqlite:////var/lib/cinder/cinder.db
{% endif -%}
connection_recycle_time = 200

10
charms/glance-k8s/src/templates/parts/section-federation Normal file
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@@ -0,0 +1,10 @@
{% if trusted_dashboards %}
[federation]
{% for dashboard_url in trusted_dashboards -%}
trusted_dashboard = {{ dashboard_url }}
{% endfor -%}
{% endif %}
{% for sp in fid_sps -%}
[{{ sp['protocol-name'] }}]
remote_id_attribute = {{ sp['remote-id-attribute'] }}
{% endfor -%}

11
charms/glance-k8s/src/templates/parts/section-identity Normal file
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@@ -0,0 +1,11 @@
[keystone_authtoken]
{% if identity_service.internal_host -%}
www_authenticate_uri = {{ identity_service.internal_protocol }}://{{ identity_service.internal_host }}:{{ identity_service.internal_port }}
auth_url = {{ identity_service.internal_protocol }}://{{ identity_service.internal_host }}:{{ identity_service.internal_port }}
auth_type = password
project_domain_name = {{ identity_service.service_domain_name }}
user_domain_name = {{ identity_service.service_domain_name }}
project_name = {{ identity_service.service_project_name }}
username = {{ identity_service.service_user_name }}
password = {{ identity_service.service_password }}
{% endif -%}

6
charms/glance-k8s/src/templates/parts/section-middleware Normal file
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@@ -0,0 +1,6 @@
{% for section in sections -%}
[{{section}}]
{% for key, value in sections[section].items() -%}
{{ key }} = {{ value }}
{% endfor %}
{%- endfor %}

15
charms/glance-k8s/src/templates/parts/section-signing Normal file
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@@ -0,0 +1,15 @@
{% if enable_signing -%}
[signing]
{% if certfile -%}
certfile = {{ certfile }}
{% endif -%}
{% if keyfile -%}
keyfile = {{ keyfile }}
{% endif -%}
{% if ca_certs -%}
ca_certs = {{ ca_certs }}
{% endif -%}
{% if ca_key -%}
ca_key = {{ ca_key }}
{% endif -%}
{% endif -%}

25
charms/glance-k8s/src/templates/wsgi-cinder.conf.j2 Normal file
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@@ -0,0 +1,25 @@
Listen 8776
<VirtualHost *:8776>
WSGIDaemonProcess cinder processes=3 threads=1 user=cinder group=cinder \
display-name=%{GROUP}
WSGIProcessGroup cinder
WSGIScriptAlias / /usr/bin/cinder-wsgi
WSGIApplicationGroup %{GLOBAL}
WSGIPassAuthorization On
<IfVersion >= 2.4>
ErrorLogFormat "%{cu}t %M"
</IfVersion>
ErrorLog /var/log/apache2/cinder_error.log
CustomLog /var/log/apache2/cinder_access.log combined
<Directory /usr/bin>
<IfVersion >= 2.4>
Require all granted
</IfVersion>
<IfVersion < 2.4>
Order allow,deny
Allow from all
</IfVersion>
</Directory>
</VirtualHost>

24
charms/glance-k8s/src/templates/wsgi-glance-api.conf.j2 Normal file
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@@ -0,0 +1,24 @@
Listen {{ wsgi_config.public_port }}
<VirtualHost *:{{ wsgi_config.public_port }}>
WSGIDaemonProcess glance processes=3 threads=1 user={{ wsgi_config.user }} group={{ wsgi_config.group }} \
display-name=%{GROUP}
WSGIProcessGroup glance
WSGIScriptAlias / {{ wsgi_config.wsgi_public_script }}
WSGIApplicationGroup %{GLOBAL}
WSGIPassAuthorization On
<IfVersion >= 2.4>
ErrorLogFormat "%{cu}t %M"
</IfVersion>
ErrorLog {{ wsgi_config.error_log }}
CustomLog {{ wsgi_config.custom_log }} combined
<Directory /usr/bin>
<IfVersion >= 2.4>
Require all granted
</IfVersion>
<IfVersion < 2.4>
Order allow,deny
Allow from all
</IfVersion>
</Directory>
</VirtualHost>

17
charms/glance-k8s/test-requirements.txt Normal file
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@@ -0,0 +1,17 @@
# 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,<=2.4.1
pyflakes==2.1.1
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?)

0
charms/glance-k8s/tests/__init__.py Normal file
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66
charms/glance-k8s/tests/test_charm.py Normal file
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@@ -0,0 +1,66 @@
# Copyright 2021 liam
# See LICENSE file for licensing details.
#
# Learn more about testing at: https://juju.is/docs/sdk/testing
import unittest
from unittest.mock import Mock
from charm import SunbeamGlanceOperatorCharm
from ops.model import ActiveStatus
from ops.testing import Harness
class TestCharm(unittest.TestCase):
def setUp(self):
self.harness = Harness(SunbeamGlanceOperatorCharm)
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())

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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
charmcraft
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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charms/glance-k8s/unit_tests/__init__.py Normal file
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72
charms/glance-k8s/unit_tests/test_cinder_charm.py Normal file
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#!/usr/bin/env python3
# Copyright 2021 Canonical Ltd.
#
# 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
sys.path.append('lib') # noqa
sys.path.append('src') # noqa
import charm
import advanced_sunbeam_openstack.test_utils as test_utils
class _GlanceWallabyOperatorCharm(charm.GlanceWallabyOperatorCharm):
def __init__(self, framework):
self.seen_events = []
self.render_calls = []
super().__init__(framework)
def _log_event(self, event):
self.seen_events.append(type(event).__name__)
def renderer(self, containers, container_configs, template_dir,
openstack_release, adapters):
self.render_calls.append(
(
containers,
container_configs,
template_dir,
openstack_release,
adapters))
def configure_charm(self, event):
super().configure_charm(event)
self._log_event(event)
class TestGlanceOperatorCharm(test_utils.CharmTestCase):
PATCHES = [
'KubernetesServicePatch'
]
def setUp(self):
self.container_calls = {
'push': {},
'pull': [],
'remove_path': []}
super().setUp(charm, self.PATCHES)
self.harness = test_utils.get_harness(
_GlanceWallabyOperatorCharm,
container_calls=self.container_calls)
self.addCleanup(self.harness.cleanup)
self.harness.begin()
def test_pebble_ready_handler(self):
self.assertEqual(self.harness.charm.seen_events, [])
self.harness.container_pebble_ready('glance-api')
self.assertEqual(self.harness.charm.seen_events, ['PebbleReadyEvent'])