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# 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
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@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)