--- /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.layer.caas_base import pod_spec_set
+from charms.reactive import endpoint_from_flag
+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("lcm-k8s.configured")
+
+
+@when("config.changed")
+@when("leadership.is_leader")
+def restart():
+ clear_flag("lcm-k8s.configured")
+
+
+@when_not("kafka.ready")
+@when_not("lcm-k8s.configured")
+def waiting_for_kafka():
+ layer.status.waiting("Waiting for kafka to be ready")
+
+
+@when_not("mongo.ready")
+@when_not("lcm-k8s.configured")
+def waiting_for_mongo():
+ layer.status.waiting("Waiting for mongo to be ready")
+
+
+@when_not("ro.ready")
+@when_not("lcm-k8s.configured")
+def waiting_for_ro():
+ layer.status.waiting("Waiting for ro to be ready")
+
+
+@when("kafka.ready", "mongo.ready", "ro.ready")
+@when_not("lcm-k8s.configured")
+@when("leadership.is_leader")
+def configure():
+ layer.status.maintenance("Configuring lcm container")
+ try:
+ kafka = endpoint_from_flag("kafka.ready")
+ mongo = endpoint_from_flag("mongo.ready")
+ osm_ro = endpoint_from_flag("ro.ready")
+
+ if kafka and mongo and osm_ro:
+ kafka_units = kafka.kafkas()
+ kafka_unit = kafka_units[0]
+
+ mongo_uri = mongo.connection_string()
+ log("Mongo URI: {}".format(mongo_uri))
+
+ ros = osm_ro.ros()
+ ro_unit = ros[0]
+
+ if (
+ mongo_uri
+ and kafka_unit["host"]
+ and kafka_unit["port"]
+ and ro_unit["host"]
+ and ro_unit["port"]
+ ):
+ spec = make_pod_spec(
+ ro_unit["host"],
+ ro_unit["port"],
+ kafka_unit["host"],
+ kafka_unit["port"],
+ mongo_uri,
+ )
+
+ log("set pod spec:\n{}".format(spec))
+ pod_spec_set(spec)
+ layer.status.active("creating container")
+ set_flag("lcm-k8s.configured")
+ except Exception as e:
+ layer.status.blocked("k8s spec failed to deploy: {}".format(e))
+
+
+@when("lcm-k8s.configured")
+def set_lcm_active():
+ layer.status.active("ready")
+
+
+def make_pod_spec(ro_host, ro_port, kafka_host, kafka_port, mongo_uri):
+ """Make pod specification for Kubernetes
+
+ Args:
+ ro_host (str): RO hostname or IP
+ ro_port (str): RO Port
+ 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()
+
+ cfg = config()
+ md = metadata()
+
+ data = {
+ "name": md.get("name"),
+ "docker_image": cfg.get("image"),
+ "ro_host": ro_host,
+ "ro_port": ro_port,
+ "kafka_host": kafka_host,
+ "kafka_port": kafka_port,
+ "mongo_uri": mongo_uri,
+ }
+ data.update(cfg)
+
+ return pod_spec_template % data