4d4b4a41b0
Machine charms need external connectivity to access services hosted on a K8S substrate. Ensure rabbitmq / ovn relay are access remotely for machine charms. Closes-Bug: #2098974 Change-Id: Ifadb196dd6d60e33feab7dc0d835a7ea84444b9e Signed-off-by: Guillaume Boutry <guillaume.boutry@canonical.com>
643 lines
21 KiB
Python
643 lines
21 KiB
Python
# Copyright 2022 Canonical Ltd.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Base classes for defining OVN relation handlers."""
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import ipaddress
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import itertools
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import logging
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import socket
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import typing
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from typing import (
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Callable,
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Iterator,
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)
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import ops.charm
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import ops.framework
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import ops_sunbeam.interfaces as sunbeam_interfaces
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import ops_sunbeam.relation_handlers as sunbeam_rhandlers
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import ops_sunbeam.tracing as sunbeam_tracing
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from ops.model import (
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BlockedStatus,
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)
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from ops_sunbeam.charm import (
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OSBaseOperatorCharm,
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)
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if typing.TYPE_CHECKING:
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import charms.ovn_central_k8s.v0.ovsdb as ovsdb
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logger = logging.getLogger(__name__)
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IPAddress = ipaddress.IPv4Address | ipaddress.IPv6Address | str
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@sunbeam_tracing.trace_type
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class OVNRelationUtils:
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"""Common utilities for processing OVN relations."""
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charm: OSBaseOperatorCharm
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relation_name: str
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interface: typing.Union[
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"ovsdb.OVSDBCMSRequires",
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"ovsdb.OVSDBCMSProvides",
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sunbeam_interfaces.OperatorPeers,
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]
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DB_NB_PORT = 6641
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DB_SB_PORT = 6642
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DB_SB_ADMIN_PORT = 16642
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DB_NB_CLUSTER_PORT = 6643
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DB_SB_CLUSTER_PORT = 6644
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def _format_addr(self, addr: str) -> str:
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"""Validate and format IP address.
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:param addr: IPv6 or IPv4 address
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:type addr: str
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:returns: Address string, optionally encapsulated in brackets ([])
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:rtype: str
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:raises: ValueError
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"""
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ipaddr = ipaddress.ip_address(addr)
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if isinstance(ipaddr, ipaddress.IPv6Address):
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fmt = "[{}]"
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else:
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fmt = "{}"
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return fmt.format(ipaddr)
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def _remote_addrs(self, key: str) -> Iterator[str]:
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"""Retrieve addresses published by remote units.
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:param key: Relation data key to retrieve value from.
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:type key: str
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:returns: addresses published by remote units.
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:rtype: Iterator[str]
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"""
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for addr in self.interface.get_all_unit_values(key): # type: ignore
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try:
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addr = self._format_addr(addr)
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yield addr
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except ValueError:
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continue
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def _remote_hostnames(self, key: str) -> Iterator[str]:
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"""Retrieve hostnames published by remote units.
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:param key: Relation data key to retrieve value from.
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:type key: str
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:returns: hostnames published by remote units.
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:rtype: Iterator[str]
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"""
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for hostname in self.interface.get_all_unit_values(key): # type: ignore
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yield hostname
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@property
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def cluster_remote_hostnames(self) -> Iterator[str]:
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"""Retrieve remote hostnames bound to remote endpoint.
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:returns: hostnames bound to remote endpoints.
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:rtype: Iterator[str]
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"""
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return self._remote_hostnames("bound-hostname")
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@property
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def cluster_remote_addrs(self) -> Iterator[str]:
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"""Retrieve remote addresses bound to remote endpoint.
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:returns: addresses bound to remote endpoints.
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:rtype: Iterator[str]
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"""
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return self._remote_addrs("bound-address")
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@property
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def cluster_remote_ingress_addrs(self) -> Iterator[str]:
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"""Retrieve remote addresses bound to remote endpoint.
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:returns: addresses bound to remote endpoints.
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:rtype: Iterator[str]
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"""
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return self._remote_addrs("ingress-bound-address")
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def db_connection_strs(
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self, hostnames: typing.Iterable[str], port: int, proto: str = "ssl"
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) -> Iterator[str]:
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"""Provide connection strings.
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:param hostnames: List of hostnames to include in conn strs
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:type hostnames: List[str]
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:param port: Port number
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:type port: int
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:param proto: Protocol
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:type proto: str
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:returns: connection strings
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:rtype: Iterator[str]
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"""
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for hostname in hostnames:
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yield ":".join((proto, str(hostname), str(port)))
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@property
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def db_nb_port(self) -> int:
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"""Provide port number for OVN Northbound OVSDB.
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:returns: port number for OVN Northbound OVSDB.
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:rtype: int
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"""
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return self.DB_NB_PORT
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@property
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def db_sb_port(self) -> int:
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"""Provide port number for OVN Southbound OVSDB.
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:returns: port number for OVN Southbound OVSDB.
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:rtype: int
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"""
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return self.DB_SB_PORT
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@property
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def db_sb_admin_port(self) -> int:
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"""Provide admin port number for OVN Southbound OVSDB.
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This is a special listener to allow ``ovn-northd`` to connect to an
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endpoint without RBAC enabled as there is currently no RBAC profile
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allowing ``ovn-northd`` to perform its work.
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:returns: admin port number for OVN Southbound OVSDB.
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:rtype: int
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"""
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return self.DB_SB_ADMIN_PORT
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@property
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def db_nb_cluster_port(self) -> int:
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"""Provide port number for OVN Northbound OVSDB.
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:returns port number for OVN Northbound OVSDB.
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:rtype: int
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"""
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return self.DB_NB_CLUSTER_PORT
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@property
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def db_sb_cluster_port(self) -> int:
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"""Provide port number for OVN Southbound OVSDB.
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:returns: port number for OVN Southbound OVSDB.
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:rtype: int
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"""
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return self.DB_SB_CLUSTER_PORT
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@property
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def db_nb_connection_strs(self) -> Iterator[str]:
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"""Provide OVN Northbound OVSDB connection strings.
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:returns: OVN Northbound OVSDB connection strings.
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:rtpye: Iterator[str]
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"""
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return self.db_connection_strs(
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self.cluster_remote_addrs, self.db_nb_port
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)
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@property
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def db_sb_connection_strs(self) -> Iterator[str]:
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"""Provide OVN Southbound OVSDB connection strings.
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:returns: OVN Southbound OVSDB connection strings.
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:rtpye: Iterator[str]
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"""
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return self.db_connection_strs(
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self.cluster_remote_addrs, self.db_sb_port
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)
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@property
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def db_ingress_nb_connection_strs(self) -> Iterator[str]:
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"""Provide OVN Northbound OVSDB connection strings.
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:returns: OVN Northbound OVSDB connection strings.
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:rtpye: Iterator[str]
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"""
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return self.db_connection_strs(
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self.cluster_remote_ingress_addrs, self.db_nb_port
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)
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@property
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def db_ingress_sb_connection_strs(self) -> Iterator[str]:
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"""Provide OVN Southbound OVSDB connection strings.
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:returns: OVN Southbound OVSDB connection strings.
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:rtpye: Iterator[str]
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"""
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return self.db_connection_strs(
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self.cluster_remote_ingress_addrs, self.db_sb_port
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)
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@property
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def db_nb_connection_hostname_strs(self) -> Iterator[str]:
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"""Provide OVN Northbound OVSDB connection strings.
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:returns: OVN Northbound OVSDB connection strings.
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:rtpye: Iterator[str]
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"""
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return self.db_connection_strs(
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self.cluster_remote_hostnames, self.db_nb_port
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)
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@property
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def db_sb_connection_hostname_strs(self) -> Iterator[str]:
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"""Provide OVN Southbound OVSDB connection strings.
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:returns: OVN Southbound OVSDB connection strings.
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:rtpye: Iterator[str]
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"""
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return self.db_connection_strs(
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self.cluster_remote_hostnames, self.db_sb_port
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)
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@property
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def cluster_local_addr(self) -> IPAddress | None:
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"""Retrieve local address bound to endpoint.
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:returns: IPv4 or IPv6 address bound to endpoint
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:rtype: str
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"""
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return self._endpoint_local_bound_addr()
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@property
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def cluster_ingress_addr(self) -> IPAddress | None:
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"""Retrieve local address bound to endpoint.
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:returns: IPv4 or IPv6 address bound to endpoint
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:rtype: str
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"""
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addresses = self._endpoint_ingress_bound_addresses()
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if len(addresses) > 1:
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logger.debug("Found multiple ingress addresses, picking first one")
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address = addresses[0]
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elif len(addresses) == 1:
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address = addresses[0]
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else:
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logger.debug("Found no ingress addresses")
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address = None
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return address
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@property
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def cluster_local_hostname(self) -> str:
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"""Retrieve local hostname for unit.
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:returns: Resolvable hostname for local unit.
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:rtype: str
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"""
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return socket.getfqdn()
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def _endpoint_local_bound_addr(self) -> IPAddress | None:
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"""Retrieve local address bound to endpoint.
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:returns: IPv4 or IPv6 address bound to endpoint
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"""
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addr = None
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for relation in self.charm.model.relations.get(self.relation_name, []):
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binding = self.charm.model.get_binding(relation)
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if binding and binding.network and binding.network.bind_address:
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addr = binding.network.bind_address
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break
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return addr
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def _endpoint_ingress_bound_addresses(self) -> list[IPAddress]:
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"""Retrieve local address bound to endpoint.
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:returns: IPv4 or IPv6 address bound to endpoint
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"""
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addresses: list[IPAddress] = []
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for relation in self.charm.model.relations.get(self.relation_name, []):
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binding = self.charm.model.get_binding(relation)
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if (
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binding
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and binding.network
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and binding.network.ingress_addresses
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):
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addresses.extend(binding.network.ingress_addresses)
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return list(set(addresses))
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@sunbeam_tracing.trace_type
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class OVNDBClusterPeerHandler(
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sunbeam_rhandlers.BasePeerHandler, OVNRelationUtils
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):
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"""Handle OVN peer relation."""
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interface: sunbeam_interfaces.OperatorPeers
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def publish_cluster_local_hostname(self, hostname: str | None = None):
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"""Announce hostname on relation.
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This will be used by our peers and clients to build a connection
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string to the remote cluster.
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:param hostname: Override hostname to announce.
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:type hostname: Optional[str]
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"""
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_hostname = hostname or self.cluster_local_hostname
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if _hostname:
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self.interface.set_unit_data({"bound-hostname": str(_hostname)})
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def expected_peers_available(self) -> bool:
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"""Whether expected peers have joined and published data on peer rel.
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NOTE: This does not work for the normal inter-charm relations, please
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refer separate method for that in the shared interface library.
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:returns: True if expected peers have joined and published data,
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False otherwise.
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:rtype: bool
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"""
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joined_units = self.interface.all_joined_units()
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# Remove this unit from expected_peer_units count
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expected_remote_units = self.interface.expected_peer_units() - 1
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if len(joined_units) < expected_remote_units:
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logging.debug(
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f"Expected {expected_remote_units} but only {joined_units} "
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"have joined so far"
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)
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return False
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hostnames = self.interface.get_all_unit_values("bound-hostname")
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if len(hostnames) < expected_remote_units:
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logging.debug(
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"Not all units have published a bound-hostname. Current "
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f"hostname list: {hostnames}"
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)
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return False
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else:
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logging.debug(
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f"All expected peers are present. Hostnames: {hostnames}"
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)
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return True
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@property
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def db_nb_connection_strs(self) -> Iterator[str]:
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"""Provide Northbound DB connection strings.
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We override the parent property because for the peer relation
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``cluster_remote_hostnames`` does not contain self.
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:returns: Northbound DB connection strings
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:rtype: Iterator[str]
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"""
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return itertools.chain(
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self.db_connection_strs(
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(self.cluster_local_hostname,), self.db_nb_port
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),
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self.db_connection_strs(
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self.cluster_remote_hostnames, self.db_nb_port
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),
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)
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@property
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def db_nb_cluster_connection_strs(self) -> Iterator[str]:
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"""Provide Northbound DB Cluster connection strings.
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We override the parent property because for the peer relation
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``cluster_remote_hostnames`` does not contain self.
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:returns: Northbound DB connection strings
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:rtype: Iterator[str]
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"""
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return itertools.chain(
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self.db_connection_strs(
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(self.cluster_local_hostname,), self.db_nb_cluster_port
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),
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self.db_connection_strs(
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self.cluster_remote_hostnames, self.db_nb_cluster_port
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),
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)
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@property
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def db_sb_cluster_connection_strs(self) -> Iterator[str]:
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"""Provide Southbound DB Cluster connection strings.
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We override the parent property because for the peer relation
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``cluster_remote_hostnames`` does not contain self.
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:returns: Southbound DB connection strings
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:rtype: Iterator[str]
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"""
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return itertools.chain(
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self.db_connection_strs(
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(self.cluster_local_hostname,), self.db_sb_cluster_port
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),
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self.db_connection_strs(
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self.cluster_remote_hostnames, self.db_sb_cluster_port
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),
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)
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@property
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def db_sb_connection_strs(self) -> Iterator[str]:
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"""Provide Southbound DB connection strings.
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We override the parent property because for the peer relation
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``cluster_remote_hostnames`` does not contain self. We use a different
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port for connecting to the SB DB as there is currently no RBAC profile
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that provide the privileges ``ovn-northd`` requires to operate.
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:returns: Southbound DB connection strings
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:rtype: Iterator[str]
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"""
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return itertools.chain(
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self.db_connection_strs(
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(self.cluster_local_hostname,), self.db_sb_admin_port
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),
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self.db_connection_strs(
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self.cluster_remote_hostnames, self.db_sb_admin_port
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),
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)
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def _on_peers_relation_joined(
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self, event: ops.framework.EventBase
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) -> None:
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"""Process peer joined event."""
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self.publish_cluster_local_hostname()
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def context(self) -> dict:
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"""Context from relation data."""
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ctxt = super().context()
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ctxt.update(
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{
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"cluster_local_hostname": self.cluster_local_hostname,
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"cluster_remote_hostnames": self.cluster_remote_hostnames,
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"db_nb_cluster_connection_strs": self.db_nb_cluster_connection_strs,
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"db_sb_cluster_connection_strs": self.db_sb_cluster_connection_strs,
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"db_sb_cluster_port": self.db_sb_cluster_port,
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"db_nb_cluster_port": self.db_nb_cluster_port,
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"db_nb_connection_strs": list(self.db_nb_connection_strs),
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"db_sb_connection_strs": list(self.db_sb_connection_strs),
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}
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)
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return ctxt
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@sunbeam_tracing.trace_type
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class OVSDBCMSProvidesHandler(
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sunbeam_rhandlers.RelationHandler, OVNRelationUtils
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):
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"""Handle provides side of ovsdb-cms."""
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interface: "ovsdb.OVSDBCMSProvides"
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def __init__(
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self,
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charm: "OSBaseOperatorCharm",
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relation_name: str,
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callback_f: Callable,
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loadbalancer_address: str | None = None,
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mandatory: bool = False,
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) -> None:
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"""Run constructor."""
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super().__init__(charm, relation_name, callback_f, mandatory)
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self.loadbalancer_address = loadbalancer_address
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def __post_init__(self):
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"""Post init hook."""
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super().__post_init__()
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self._update_address_data()
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def setup_event_handler(self) -> ops.framework.Object:
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"""Configure event handlers for an Identity service relation."""
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# Lazy import to ensure this lib is only required if the charm
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# has this relation.
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logger.debug("Setting up ovs-cms provides event handler")
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import charms.ovn_central_k8s.v0.ovsdb as ovsdb
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ovsdb_svc = sunbeam_tracing.trace_type(ovsdb.OVSDBCMSProvides)(
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self.charm,
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self.relation_name,
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self.loadbalancer_address,
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)
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self.framework.observe(
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ovsdb_svc.on.ready, self._on_ovsdb_service_ready
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)
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return ovsdb_svc
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def _on_ovsdb_service_ready(self, event: ops.framework.EventBase) -> None:
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"""Handle OVSDB CMS change events."""
|
|
self.callback_f(event)
|
|
|
|
def _update_address_data(self) -> None:
|
|
"""Update hostname and IP address data on all relations."""
|
|
self.interface.set_unit_data(
|
|
{
|
|
"bound-hostname": str(self.cluster_local_hostname),
|
|
"bound-address": str(self.cluster_local_addr),
|
|
"ingress-bound-address": str(self.cluster_ingress_addr),
|
|
}
|
|
)
|
|
|
|
@property
|
|
def ready(self) -> bool:
|
|
"""Whether the interface is ready."""
|
|
return True
|
|
|
|
|
|
@sunbeam_tracing.trace_type
|
|
class OVSDBCMSRequiresHandler(
|
|
sunbeam_rhandlers.RelationHandler, OVNRelationUtils
|
|
):
|
|
"""Handle provides side of ovsdb-cms."""
|
|
|
|
interface: "ovsdb.OVSDBCMSRequires"
|
|
|
|
def __init__(
|
|
self,
|
|
charm: "OSBaseOperatorCharm",
|
|
relation_name: str,
|
|
callback_f: Callable,
|
|
external_connectivity: bool = False,
|
|
mandatory: bool = False,
|
|
) -> None:
|
|
"""Run constructor."""
|
|
super().__init__(charm, relation_name, callback_f, mandatory)
|
|
self.external_connectivity = external_connectivity
|
|
|
|
def setup_event_handler(self) -> ops.framework.Object:
|
|
"""Configure event handlers for an Identity service relation."""
|
|
# Lazy import to ensure this lib is only required if the charm
|
|
# has this relation.
|
|
logger.debug("Setting up ovs-cms requires event handler")
|
|
import charms.ovn_central_k8s.v0.ovsdb as ovsdb
|
|
|
|
ovsdb_svc = sunbeam_tracing.trace_type(ovsdb.OVSDBCMSRequires)(
|
|
self.charm,
|
|
self.relation_name,
|
|
external_connectivity=self.external_connectivity,
|
|
)
|
|
self.framework.observe(
|
|
ovsdb_svc.on.ready, self._on_ovsdb_service_ready
|
|
)
|
|
self.framework.observe(
|
|
ovsdb_svc.on.goneaway, self._on_ovsdb_service_goneaway
|
|
)
|
|
return ovsdb_svc
|
|
|
|
def _on_ovsdb_service_ready(self, event: ops.framework.EventBase) -> None:
|
|
"""Handle OVSDB CMS change events."""
|
|
self.callback_f(event)
|
|
|
|
def _on_ovsdb_service_goneaway(
|
|
self, event: ops.framework.EventBase
|
|
) -> None:
|
|
"""Handle OVSDB CMS change events."""
|
|
self.callback_f(event)
|
|
if self.mandatory:
|
|
logger.debug("ovsdb-cms integration removed, stop services")
|
|
self.charm.stop_services({self.relation_name})
|
|
self.status.set(BlockedStatus("integration missing"))
|
|
|
|
@property
|
|
def ready(self) -> bool:
|
|
"""Whether the interface is ready."""
|
|
return self.interface.remote_ready()
|
|
|
|
def context(self) -> dict:
|
|
"""Context from relation data."""
|
|
ctxt = super().context()
|
|
ctxt.update(
|
|
{
|
|
"local_hostname": self.cluster_local_hostname,
|
|
"hostnames": self.interface.bound_hostnames(),
|
|
"local_address": self.cluster_local_addr,
|
|
"addresses": self.interface.bound_addresses(),
|
|
"db_sb_connection_strs": ",".join(self.db_sb_connection_strs),
|
|
"db_nb_connection_strs": ",".join(self.db_nb_connection_strs),
|
|
"db_sb_connection_hostname_strs": ",".join(
|
|
self.db_sb_connection_hostname_strs
|
|
),
|
|
"db_nb_connection_hostname_strs": ",".join(
|
|
self.db_nb_connection_hostname_strs
|
|
),
|
|
}
|
|
)
|
|
if lb_address := self.interface.loadbalancer_address():
|
|
ctxt["db_ingress_sb_connection_strs"] = self.db_connection_strs(
|
|
[lb_address], self.db_sb_port
|
|
)
|
|
ctxt["db_ingress_nb_connection_strs"] = self.db_connection_strs(
|
|
[lb_address], self.db_nb_port
|
|
)
|
|
else:
|
|
ctxt["db_ingress_sb_connection_strs"] = (
|
|
self.db_ingress_sb_connection_strs
|
|
)
|
|
ctxt["db_ingress_nb_connection_strs"] = (
|
|
self.db_ingress_nb_connection_strs
|
|
)
|
|
|
|
return ctxt
|