+++ /dev/null
-# Copyright 2021 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.
-#
-# For those usages not covered by the Apache License, Version 2.0 please
-# contact: legal@canonical.com
-#
-# To get in touch with the maintainers, please contact:
-# osm-charmers@lists.launchpad.net
-##
-
-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,
- network_get,
- relation_id,
-)
-from charms import layer
-from charmhelpers.core import hookenv
-import traceback
-
-
-@hook("upgrade-charm")
-@when("leadership.is_leader")
-def upgrade():
- clear_flag("prometheus-k8s.configured")
-
-
-@when("config.changed")
-@when("leadership.is_leader")
-def restart():
- clear_flag("prometheus-k8s.configured")
-
-
-@when_not("prometheus-k8s.configured")
-@when("leadership.is_leader")
-def configure():
- layer.status.maintenance("Configuring prometheus container")
- try:
- spec = make_pod_spec()
- log("set pod spec:\n{}".format(spec))
- layer.caas_base.pod_spec_set(spec)
- set_flag("prometheus-k8s.configured")
- layer.status.active("ready")
-
- except Exception as e:
- layer.status.blocked("k8s spec failed to deploy: {}".format(e))
- log(traceback.format_exc(), level=hookenv.ERROR)
-
-
-@when("prometheus-k8s.configured")
-def set_prometheus_active():
- layer.status.active("ready")
-
-
-@when_not("leadership.is_leader")
-def non_leaders_active():
- layer.status.active("ready")
-
-
-@when("prometheus-k8s.configured", "endpoint.prometheus.available")
-def send_config(prometheus):
- layer.status.maintenance("Sending prometheus configuration")
- cfg = config()
- try:
- info = network_get("prometheus", relation_id())
- log("network info {0}".format(info))
- host = info.get("ingress-addresses", [""])[0]
-
- prometheus.configure(hostname=host, port=cfg.get("advertised-port"))
- clear_flag("endpoint.prometheus.available")
- except Exception as e:
- log("Exception sending config: {}".format(e))
-
-
-def make_pod_spec():
- """Make pod specification for Kubernetes
-
- 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"),
- "docker_image": cfg.get("prometheus-image"),
- "a_docker_image": cfg.get("alpine-image"),
- }
- data.update(cfg)
- return pod_spec_template % data