installers/charm/mon/src/charm.py

   1 #!/usr/bin/env python3
   2 # Copyright 2021 Canonical Ltd.
   3 #
   4 # Licensed under the Apache License, Version 2.0 (the "License"); you may
   5 # not use this file except in compliance with the License. You may obtain
   6 # a copy of the License at
   7 #
   8 #         http://www.apache.org/licenses/LICENSE-2.0
   9 #
  10 # Unless required by applicable law or agreed to in writing, software
  11 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  12 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  13 # License for the specific language governing permissions and limitations
  14 # under the License.
  15 #
  16 # For those usages not covered by the Apache License, Version 2.0 please
  17 # contact: legal@canonical.com
  18 #
  19 # To get in touch with the maintainers, please contact:
  20 # osm-charmers@lists.launchpad.net
  21 ##
  22
  23 # pylint: disable=E0213
  24
  25
  26 import logging
  27 from typing import NoReturn
  28
  29
  30 from ops.main import main
  31 from opslib.osm.charm import CharmedOsmBase, RelationsMissing
  32 from opslib.osm.interfaces.kafka import KafkaClient
  33 from opslib.osm.interfaces.keystone import KeystoneClient
  34 from opslib.osm.interfaces.mongo import MongoClient
  35 from opslib.osm.interfaces.prometheus import PrometheusClient
  36 from opslib.osm.pod import ContainerV3Builder, PodSpecV3Builder
  37 from opslib.osm.validator import ModelValidator, validator
  38
  39
  40 logger = logging.getLogger(__name__)
  41
  42 PORT = 8000
  43
  44
  45 class ConfigModel(ModelValidator):
  46     keystone_enabled: bool
  47     vca_host: str
  48     vca_user: str
  49     vca_secret: str
  50     vca_cacert: str
  51     database_commonkey: str
  52     log_level: str
  53     openstack_default_granularity: int
  54     global_request_timeout: int
  55     collector_interval: int
  56     evaluator_interval: int
  57     grafana_url: str
  58     grafana_user: str
  59     grafana_password: str
  60
  61     @validator("log_level")
  62     def validate_log_level(cls, v):
  63         if v not in {"INFO", "DEBUG"}:
  64             raise ValueError("value must be INFO or DEBUG")
  65         return v
  66
  67
  68 class MonCharm(CharmedOsmBase):
  69     def __init__(self, *args) -> NoReturn:
  70         super().__init__(*args, oci_image="image")
  71
  72         self.kafka_client = KafkaClient(self, "kafka")
  73         self.framework.observe(self.on["kafka"].relation_changed, self.configure_pod)
  74         self.framework.observe(self.on["kafka"].relation_broken, self.configure_pod)
  75
  76         self.mongodb_client = MongoClient(self, "mongodb")
  77         self.framework.observe(self.on["mongodb"].relation_changed, self.configure_pod)
  78         self.framework.observe(self.on["mongodb"].relation_broken, self.configure_pod)
  79
  80         self.prometheus_client = PrometheusClient(self, "prometheus")
  81         self.framework.observe(
  82             self.on["prometheus"].relation_changed, self.configure_pod
  83         )
  84         self.framework.observe(
  85             self.on["prometheus"].relation_broken, self.configure_pod
  86         )
  87
  88         self.keystone_client = KeystoneClient(self, "keystone")
  89         self.framework.observe(self.on["keystone"].relation_changed, self.configure_pod)
  90         self.framework.observe(self.on["keystone"].relation_broken, self.configure_pod)
  91
  92     def _check_missing_dependencies(self, config: ConfigModel):
  93         missing_relations = []
  94
  95         if self.kafka_client.is_missing_data_in_unit():
  96             missing_relations.append("kafka")
  97         if self.mongodb_client.is_missing_data_in_unit():
  98             missing_relations.append("mongodb")
  99         if self.prometheus_client.is_missing_data_in_app():
 100             missing_relations.append("prometheus")
 101         if config.keystone_enabled:
 102             if self.keystone_client.is_missing_data_in_app():
 103                 missing_relations.append("keystone")
 104
 105         if missing_relations:
 106             raise RelationsMissing(missing_relations)
 107
 108     def build_pod_spec(self, image_info):
 109         # Validate config
 110         config = ConfigModel(**dict(self.config))
 111         # Check relations
 112         self._check_missing_dependencies(config)
 113         # Create Builder for the PodSpec
 114         pod_spec_builder = PodSpecV3Builder()
 115         # Build Container
 116         container_builder = ContainerV3Builder(self.app.name, image_info)
 117         container_builder.add_port(name=self.app.name, port=PORT)
 118         container_builder.add_envs(
 119             {
 120                 # General configuration
 121                 "ALLOW_ANONYMOUS_LOGIN": "yes",
 122                 "OSMMON_OPENSTACK_DEFAULT_GRANULARITY": config.openstack_default_granularity,
 123                 "OSMMON_GLOBAL_REQUEST_TIMEOUT": config.global_request_timeout,
 124                 "OSMMON_GLOBAL_LOGLEVEL": config.log_level,
 125                 "OSMMON_COLLECTOR_INTERVAL": config.collector_interval,
 126                 "OSMMON_EVALUATOR_INTERVAL": config.evaluator_interval,
 127                 # Kafka configuration
 128                 "OSMMON_MESSAGE_DRIVER": "kafka",
 129                 "OSMMON_MESSAGE_HOST": self.kafka_client.host,
 130                 "OSMMON_MESSAGE_PORT": self.kafka_client.port,
 131                 # Database configuration
 132                 "OSMMON_DATABASE_DRIVER": "mongo",
 133                 "OSMMON_DATABASE_URI": self.mongodb_client.connection_string,
 134                 "OSMMON_DATABASE_COMMONKEY": config.database_commonkey,
 135                 # Prometheus configuration
 136                 "OSMMON_PROMETHEUS_URL": f"http://{self.prometheus_client.hostname}:{self.prometheus_client.port}",
 137                 # VCA configuration
 138                 "OSMMON_VCA_HOST": config.vca_host,
 139                 "OSMMON_VCA_USER": config.vca_user,
 140                 "OSMMON_VCA_SECRET": config.vca_secret,
 141                 "OSMMON_VCA_CACERT": config.vca_cacert,
 142                 "OSMMON_GRAFANA_URL": config.grafana_url,
 143                 "OSMMON_GRAFANA_USER": config.grafana_user,
 144                 "OSMMON_GRAFANA_PASSWORD": config.grafana_password,
 145             }
 146         )
 147         if config.keystone_enabled:
 148             container_builder.add_envs(
 149                 {
 150                     "OSMMON_KEYSTONE_ENABLED": True,
 151                     "OSMMON_KEYSTONE_URL": self.keystone_client.host,
 152                     "OSMMON_KEYSTONE_DOMAIN_NAME": self.keystone_client.user_domain_name,
 153                     "OSMMON_KEYSTONE_PROJECT_DOMAIN_NAME": self.keystone_client.project_domain_name,
 154                     "OSMMON_KEYSTONE_SERVICE_USER": self.keystone_client.username,
 155                     "OSMMON_KEYSTONE_SERVICE_PASSWORD": self.keystone_client.password,
 156                     "OSMMON_KEYSTONE_SERVICE_PROJECT": self.keystone_client.service,
 157                 }
 158             )
 159
 160         container = container_builder.build()
 161         # Add container to pod spec
 162         pod_spec_builder.add_container(container)
 163         return pod_spec_builder.build()
 164
 165
 166 if __name__ == "__main__":
 167     main(MonCharm)