+++ /dev/null
-# Copyright 2020 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.
-from charms.reactive import endpoint_from_flag
-from charms.layer.caas_base import pod_spec_set
-from charms.reactive import when, when_not, hook
-from charms.reactive.flags import set_flag, clear_flag
-from charmhelpers.core.hookenv import log, metadata, config
-from charms import layer
-
-
-@hook("upgrade-charm")
-@when("leadership.is_leader")
-def upgrade():
- clear_flag("mon-k8s.configured")
-
-
-@when("config.changed")
-@when("leadership.is_leader")
-def restart():
- clear_flag("mon-k8s.configured")
-
-
-@when_not("kafka.ready")
-@when_not("mon-k8s.configured")
-@when("leadership.is_leader")
-def waiting_for_kafka():
- layer.status.waiting("Waiting for kafka to be ready")
-
-
-@when_not("mongo.ready")
-@when_not("mon-k8s.configured")
-@when("leadership.is_leader")
-def waiting_for_mongo():
- layer.status.waiting("Waiting for mongo to be ready")
-
-
-@when_not("endpoint.prometheus.available")
-@when_not("mon-k8s.configured")
-@when("leadership.is_leader")
-def waiting_for_prometheus():
- layer.status.waiting("Waiting for prometheus to be ready")
-
-
-@when("kafka.ready", "mongo.ready", "endpoint.prometheus.available")
-@when_not("mon-k8s.configured")
-@when("leadership.is_leader")
-def configure():
- layer.status.maintenance("Configuring mon container")
- try:
- kafka = endpoint_from_flag("kafka.ready")
- mongo = endpoint_from_flag("mongo.ready")
- prometheus = endpoint_from_flag("endpoint.prometheus.available")
-
- if kafka and mongo and prometheus:
- kafka_units = kafka.kafkas()
- kafka_unit = kafka_units[0]
-
- mongo_uri = mongo.connection_string()
- log("Mongo URI: {}".format(mongo_uri))
-
- prometheus_url = prometheus.targets()[0]["targets"][0]
-
- if mongo_uri and kafka_unit["host"]:
-
- spec = make_pod_spec(
- kafka_unit["host"], kafka_unit["port"], mongo_uri, prometheus_url
- )
-
- log("set pod spec:\n{}".format(spec))
- pod_spec_set(spec)
- set_flag("mon-k8s.configured")
- except Exception as e:
- layer.status.blocked("k8s spec failed to deploy: {}".format(e))
-
-
-@when("kafka.ready", "mongo.ready", "endpoint.prometheus.available")
-@when_not("leadership.is_leader")
-def non_leaders_active():
- layer.status.active("ready")
-
-
-@when("mon-k8s.configured")
-def set_mon_active():
- layer.status.active("ready")
-
-
-def make_pod_spec(kafka_host, kafka_port, mongo_uri, prometheus_url):
- """Make pod specification for Kubernetes
-
- Args:
- kafka_host (str): Kafka hostname or IP
- kafka_port (int): Kafka port
- mongo_uri (str): Mongo URI
- Returns:
- pod_spec: Pod specification for Kubernetes
- """
-
- with open("reactive/spec_template.yaml") as spec_file:
- pod_spec_template = spec_file.read()
-
- md = metadata()
- cfg = config()
-
- data = {
- "name": md.get("name"),
- "kafka_host": kafka_host,
- "kafka_port": kafka_port,
- "mongo_uri": mongo_uri,
- "prometheus_url": prometheus_url,
- }
- data.update(cfg)
- return pod_spec_template % data