Update kubernetes_service_patch to v1
v1 of the kubernetes_service_patch lib will patches the service definition on `status_update` event. This helps when Juju refreshes the patched services to their initial state. Depends-On: https://review.opendev.org/c/openstack/charm-ops-sunbeam/+/880270 Change-Id: I44ee58cb9f5ddee6339bcd207365a2dcb49ac006 Signed-off-by: Guillaume Boutry <guillaume.boutry@canonical.com>
This commit is contained in:
Guillaume Boutry
parent
294e26135c
commit
069a9daca6
|
|
@ -1,6 +1,6 @@
|
|||
#!/bin/bash
|
||||
|
||||
echo "INFO: Fetching libs from charmhub."
|
||||
charmcraft fetch-lib charms.observability_libs.v0.kubernetes_service_patch
|
||||
charmcraft fetch-lib charms.observability_libs.v1.kubernetes_service_patch
|
||||
charmcraft fetch-lib charms.ovn_central_k8s.v0.ovsdb
|
||||
charmcraft fetch-lib charms.tls_certificates_interface.v1.tls_certificates
|
||||
|
|
|
|||
|
|
@ -9,21 +9,20 @@ service named after the application in the namespace (named after the Juju model
|
|||
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.
|
||||
charm. In this case, any modifications to the default service (created during deployment), will be
|
||||
overwritten during a charm upgrade.
|
||||
|
||||
When initialised, 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:
|
||||
The constructor simply takes a reference to the parent charm, and a list of
|
||||
[`lightkube`](https://github.com/gtsystem/lightkube) ServicePorts that each define a port for the
|
||||
service. For information regarding the `lightkube` `ServicePort` model, please visit the
|
||||
`lightkube` [docs](https://gtsystem.github.io/lightkube-models/1.23/models/core_v1/#serviceport).
|
||||
|
||||
- a name for the port
|
||||
- port for the service to listen on
|
||||
- optionally: a targetPort for the service (the port in the container!)
|
||||
- optionally: a nodePort for the service (for NodePort or LoadBalancer services only!)
|
||||
- optionally: a name of the service (in case service name needs to be patched as well)
|
||||
Optionally, a name of the service (in case service name needs to be patched as well), labels,
|
||||
selectors, and annotations can be provided as keyword arguments.
|
||||
|
||||
## Getting Started
|
||||
|
||||
|
|
@ -32,8 +31,8 @@ that you also need to add `lightkube` and `lightkube-models` to your charm's `re
|
|||
|
||||
```shell
|
||||
cd some-charm
|
||||
charmcraft fetch-lib charms.observability_libs.v0.kubernetes_service_patch
|
||||
echo <<-EOF >> requirements.txt
|
||||
charmcraft fetch-lib charms.observability_libs.v1.kubernetes_service_patch
|
||||
cat << EOF >> requirements.txt
|
||||
lightkube
|
||||
lightkube-models
|
||||
EOF
|
||||
|
|
@ -41,28 +40,71 @@ EOF
|
|||
|
||||
Then, to initialise the library:
|
||||
|
||||
For ClusterIP services:
|
||||
For `ClusterIP` services:
|
||||
|
||||
```python
|
||||
# ...
|
||||
from charms.observability_libs.v0.kubernetes_service_patch import KubernetesServicePatch
|
||||
from charms.observability_libs.v1.kubernetes_service_patch import KubernetesServicePatch
|
||||
from lightkube.models.core_v1 import ServicePort
|
||||
|
||||
class SomeCharm(CharmBase):
|
||||
def __init__(self, *args):
|
||||
# ...
|
||||
self.service_patcher = KubernetesServicePatch(self, [(f"{self.app.name}", 8080)])
|
||||
port = ServicePort(443, name=f"{self.app.name}")
|
||||
self.service_patcher = KubernetesServicePatch(self, [port])
|
||||
# ...
|
||||
```
|
||||
|
||||
For LoadBalancer/NodePort services:
|
||||
For `LoadBalancer`/`NodePort` services:
|
||||
|
||||
```python
|
||||
# ...
|
||||
from charms.observability_libs.v0.kubernetes_service_patch import KubernetesServicePatch
|
||||
from charms.observability_libs.v1.kubernetes_service_patch import KubernetesServicePatch
|
||||
from lightkube.models.core_v1 import ServicePort
|
||||
|
||||
class SomeCharm(CharmBase):
|
||||
def __init__(self, *args):
|
||||
# ...
|
||||
port = ServicePort(443, name=f"{self.app.name}", targetPort=443, nodePort=30666)
|
||||
self.service_patcher = KubernetesServicePatch(
|
||||
self, [(f"{self.app.name}", 443, 443, 30666)], "LoadBalancer"
|
||||
self, [port], "LoadBalancer"
|
||||
)
|
||||
# ...
|
||||
```
|
||||
|
||||
Port protocols can also be specified. Valid protocols are `"TCP"`, `"UDP"`, and `"SCTP"`
|
||||
|
||||
```python
|
||||
# ...
|
||||
from charms.observability_libs.v1.kubernetes_service_patch import KubernetesServicePatch
|
||||
from lightkube.models.core_v1 import ServicePort
|
||||
|
||||
class SomeCharm(CharmBase):
|
||||
def __init__(self, *args):
|
||||
# ...
|
||||
tcp = ServicePort(443, name=f"{self.app.name}-tcp", protocol="TCP")
|
||||
udp = ServicePort(443, name=f"{self.app.name}-udp", protocol="UDP")
|
||||
sctp = ServicePort(443, name=f"{self.app.name}-sctp", protocol="SCTP")
|
||||
self.service_patcher = KubernetesServicePatch(self, [tcp, udp, sctp])
|
||||
# ...
|
||||
```
|
||||
|
||||
Bound with custom events by providing `refresh_event` argument:
|
||||
For example, you would like to have a configurable port in your charm and want to apply
|
||||
service patch every time charm config is changed.
|
||||
|
||||
```python
|
||||
from charms.observability_libs.v1.kubernetes_service_patch import KubernetesServicePatch
|
||||
from lightkube.models.core_v1 import ServicePort
|
||||
|
||||
class SomeCharm(CharmBase):
|
||||
def __init__(self, *args):
|
||||
# ...
|
||||
port = ServicePort(int(self.config["charm-config-port"]), name=f"{self.app.name}")
|
||||
self.service_patcher = KubernetesServicePatch(
|
||||
self,
|
||||
[port],
|
||||
refresh_event=self.on.config_changed
|
||||
)
|
||||
# ...
|
||||
```
|
||||
|
|
@ -83,15 +125,16 @@ def setUp(self, *unused):
|
|||
|
||||
import logging
|
||||
from types import MethodType
|
||||
from typing import Literal, Sequence, Tuple, Union
|
||||
from typing import List, Literal, Optional, Union
|
||||
|
||||
from lightkube import ApiError, Client
|
||||
from lightkube.core import exceptions
|
||||
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
|
||||
from ops.framework import BoundEvent, Object
|
||||
|
||||
logger = logging.getLogger(__name__)
|
||||
|
||||
|
|
@ -99,13 +142,12 @@ logger = logging.getLogger(__name__)
|
|||
LIBID = "0042f86d0a874435adef581806cddbbb"
|
||||
|
||||
# Increment this major API version when introducing breaking changes
|
||||
LIBAPI = 0
|
||||
LIBAPI = 1
|
||||
|
||||
# Increment this PATCH version before using `charmcraft publish-lib` or reset
|
||||
# to 0 if you are raising the major API version
|
||||
LIBPATCH = 6
|
||||
|
||||
PortDefinition = Union[Tuple[str, int], Tuple[str, int, int], Tuple[str, int, int, int]]
|
||||
ServiceType = Literal["ClusterIP", "LoadBalancer"]
|
||||
|
||||
|
||||
|
|
@ -115,18 +157,20 @@ class KubernetesServicePatch(Object):
|
|||
def __init__(
|
||||
self,
|
||||
charm: CharmBase,
|
||||
ports: Sequence[PortDefinition],
|
||||
service_name: str = None,
|
||||
ports: List[ServicePort],
|
||||
service_name: Optional[str] = None,
|
||||
service_type: ServiceType = "ClusterIP",
|
||||
additional_labels: dict = None,
|
||||
additional_selectors: dict = None,
|
||||
additional_annotations: dict = None,
|
||||
additional_labels: Optional[dict] = None,
|
||||
additional_selectors: Optional[dict] = None,
|
||||
additional_annotations: Optional[dict] = None,
|
||||
*,
|
||||
refresh_event: Optional[Union[BoundEvent, List[BoundEvent]]] = None,
|
||||
):
|
||||
"""Constructor for KubernetesServicePatch.
|
||||
|
||||
Args:
|
||||
charm: the charm that is instantiating the library.
|
||||
ports: a list of tuples (name, port, targetPort, nodePort) for every service port.
|
||||
ports: a list of ServicePorts
|
||||
service_name: allows setting custom name to the patched service. If none given,
|
||||
application name will be used.
|
||||
service_type: desired type of K8s service. Default value is in line with ServiceSpec's
|
||||
|
|
@ -136,6 +180,9 @@ class KubernetesServicePatch(Object):
|
|||
additional_selectors: Selectors to be added to the kubernetes service (by default only
|
||||
"app.kubernetes.io/name" is set to the service name)
|
||||
additional_annotations: Annotations to be added to the kubernetes service.
|
||||
refresh_event: an optional bound event or list of bound events which
|
||||
will be observed to re-apply the patch (e.g. on port change).
|
||||
The `install` and `upgrade-charm` events would be observed regardless.
|
||||
"""
|
||||
super().__init__(charm, "kubernetes-service-patch")
|
||||
self.charm = charm
|
||||
|
|
@ -154,23 +201,29 @@ class KubernetesServicePatch(Object):
|
|||
# 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)
|
||||
self.framework.observe(charm.on.update_status, self._patch)
|
||||
|
||||
# apply user defined events
|
||||
if refresh_event:
|
||||
if not isinstance(refresh_event, list):
|
||||
refresh_event = [refresh_event]
|
||||
|
||||
for evt in refresh_event:
|
||||
self.framework.observe(evt, self._patch)
|
||||
|
||||
def _service_object(
|
||||
self,
|
||||
ports: Sequence[PortDefinition],
|
||||
service_name: str = None,
|
||||
ports: List[ServicePort],
|
||||
service_name: Optional[str] = None,
|
||||
service_type: ServiceType = "ClusterIP",
|
||||
additional_labels: dict = None,
|
||||
additional_selectors: dict = None,
|
||||
additional_annotations: dict = None,
|
||||
additional_labels: Optional[dict] = None,
|
||||
additional_selectors: Optional[dict] = None,
|
||||
additional_annotations: Optional[dict] = None,
|
||||
) -> Service:
|
||||
"""Creates a valid Service representation.
|
||||
|
||||
Args:
|
||||
ports: a list of tuples of the form (name, port) or (name, port, targetPort)
|
||||
or (name, port, targetPort, nodePort) for every service port. If the 'targetPort'
|
||||
is omitted, it is assumed to be equal to 'port', with the exception of NodePort
|
||||
and LoadBalancer services, where all port numbers have to be specified.
|
||||
ports: a list of ServicePorts
|
||||
service_name: allows setting custom name to the patched service. If none given,
|
||||
application name will be used.
|
||||
service_type: desired type of K8s service. Default value is in line with ServiceSpec's
|
||||
|
|
@ -203,15 +256,7 @@ class KubernetesServicePatch(Object):
|
|||
),
|
||||
spec=ServiceSpec(
|
||||
selector=selector,
|
||||
ports=[
|
||||
ServicePort(
|
||||
name=p[0],
|
||||
port=p[1],
|
||||
targetPort=p[2] if len(p) > 2 else p[1], # type: ignore[misc]
|
||||
nodePort=p[3] if len(p) > 3 else None, # type: ignore[arg-type, misc]
|
||||
)
|
||||
for p in ports
|
||||
],
|
||||
ports=ports,
|
||||
type=service_type,
|
||||
),
|
||||
)
|
||||
|
|
@ -222,11 +267,15 @@ class KubernetesServicePatch(Object):
|
|||
Raises:
|
||||
PatchFailed: if patching fails due to lack of permissions, or otherwise.
|
||||
"""
|
||||
if not self.charm.unit.is_leader():
|
||||
try:
|
||||
client = Client()
|
||||
except exceptions.ConfigError as e:
|
||||
logger.warning("Error creating k8s client: %s", e)
|
||||
return
|
||||
|
||||
client = Client()
|
||||
try:
|
||||
if self._is_patched(client):
|
||||
return
|
||||
if self.service_name != self._app:
|
||||
self._delete_and_create_service(client)
|
||||
client.patch(Service, self.service_name, self.service, patch_type=PatchType.MERGE)
|
||||
|
|
@ -252,12 +301,25 @@ class KubernetesServicePatch(Object):
|
|||
bool: A boolean indicating if the service patch has been applied.
|
||||
"""
|
||||
client = Client()
|
||||
return self._is_patched(client)
|
||||
|
||||
def _is_patched(self, client: Client) -> bool:
|
||||
# Get the relevant service from the cluster
|
||||
service = client.get(Service, name=self.service_name, namespace=self._namespace)
|
||||
try:
|
||||
service = client.get(Service, name=self.service_name, namespace=self._namespace)
|
||||
except ApiError as e:
|
||||
if e.status.code == 404 and self.service_name != self._app:
|
||||
return False
|
||||
else:
|
||||
logger.error("Kubernetes service get failed: %s", str(e))
|
||||
raise
|
||||
|
||||
# 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] # type: ignore[attr-defined] # noqa: E501
|
||||
fetched_ports = [
|
||||
(p.port, p.targetPort) for p in service.spec.ports # type: ignore[attr-defined]
|
||||
] # noqa: E501
|
||||
return expected_ports == fetched_ports
|
||||
|
||||
@property
|
||||
|
|
@ -42,9 +42,12 @@ import ops_sunbeam.ovn.config_contexts as ovn_ctxts
|
|||
import ops_sunbeam.ovn.container_handlers as ovn_chandlers
|
||||
import ops_sunbeam.ovn.relation_handlers as ovn_relation_handlers
|
||||
import ops_sunbeam.relation_handlers as sunbeam_rhandlers
|
||||
from charms.observability_libs.v0.kubernetes_service_patch import (
|
||||
from charms.observability_libs.v1.kubernetes_service_patch import (
|
||||
KubernetesServicePatch,
|
||||
)
|
||||
from lightkube.models.core_v1 import (
|
||||
ServicePort,
|
||||
)
|
||||
from ops.main import (
|
||||
main,
|
||||
)
|
||||
|
|
@ -97,9 +100,7 @@ class OVNRelayOperatorCharm(ovn_charm.OSBaseOVNOperatorCharm):
|
|||
super().__init__(framework)
|
||||
self.service_patcher = KubernetesServicePatch(
|
||||
self,
|
||||
[
|
||||
("southbound", 6642),
|
||||
],
|
||||
[ServicePort(6642, name="southbound")],
|
||||
service_type="LoadBalancer",
|
||||
)
|
||||
self.framework.observe(
|
||||
|
|
|
|||
Loading…
Reference in New Issue