Add PLA charm
Change-Id: I23d9f49e7ac92150e9325f1400c22c816402f0a4
Signed-off-by: David Garcia <david.garcia@canonical.com>
diff --git a/installers/charm/pla/src/charm.py b/installers/charm/pla/src/charm.py
new file mode 100755
index 0000000..b94d62b
--- /dev/null
+++ b/installers/charm/pla/src/charm.py
@@ -0,0 +1,124 @@
+#!/usr/bin/env python3
+# 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.
+
+import sys
+import logging
+
+sys.path.append("lib")
+
+from ops.charm import CharmBase
+from ops.framework import StoredState, Object
+from ops.main import main
+from ops.model import (
+ ActiveStatus,
+ MaintenanceStatus,
+)
+
+from glob import glob
+from pathlib import Path
+from string import Template
+
+logger = logging.getLogger(__name__)
+
+
+class PLACharm(CharmBase):
+ state = StoredState()
+
+ def __init__(self, framework, key):
+ super().__init__(framework, key)
+ self.state.set_default(spec=None)
+
+ # Observe Charm related events
+ self.framework.observe(self.on.config_changed, self.on_config_changed)
+ self.framework.observe(self.on.start, self.on_start)
+ self.framework.observe(self.on.upgrade_charm, self.on_upgrade_charm)
+
+ def _apply_spec(self):
+ # Only apply the spec if this unit is a leader.
+ if not self.framework.model.unit.is_leader():
+ return
+ new_spec = self.make_pod_spec()
+ if new_spec == self.state.spec:
+ return
+ self.framework.model.pod.set_spec(new_spec)
+ self.state.spec = new_spec
+
+ def make_pod_spec(self):
+ config = self.framework.model.config
+
+ ports = [
+ {"name": "port", "containerPort": config["port"], "protocol": "TCP",},
+ ]
+
+ kubernetes = {
+ "readinessProbe": {
+ "tcpSocket": {"port": config["port"]},
+ "timeoutSeconds": 5,
+ "periodSeconds": 5,
+ "initialDelaySeconds": 10,
+ },
+ "livenessProbe": {
+ "tcpSocket": {"port": config["port"]},
+ "timeoutSeconds": 5,
+ "initialDelaySeconds": 45,
+ },
+ }
+ config_spec = {
+ "OSMPLA_MESSAGE_DRIVER": "kafka",
+ "OSMPLA_MESSAGE_HOST": config["kafka_host"],
+ "OSMPLA_MESSAGE_PORT": config["kafka_port"],
+ "OSMPLA_DATABASE_DRIVER": "mongo",
+ "OSMPLA_DATABASE_URI": config["mongo_uri"],
+ "OSMPLA_GLOBAL_LOG_LEVEL": config["log_level"],
+ }
+
+ spec = {
+ "version": 2,
+ "containers": [
+ {
+ "name": self.framework.model.app.name,
+ "image": "{}".format(config["image"]),
+ "ports": ports,
+ "kubernetes": kubernetes,
+ "config": config_spec,
+ }
+ ],
+ }
+
+ return spec
+
+ def on_config_changed(self, event):
+ """Handle changes in configuration"""
+ unit = self.model.unit
+ unit.status = MaintenanceStatus("Applying new pod spec")
+ self._apply_spec()
+ unit.status = ActiveStatus("Ready")
+
+ def on_start(self, event):
+ """Called when the charm is being installed"""
+ unit = self.model.unit
+ unit.status = MaintenanceStatus("Applying pod spec")
+ self._apply_spec()
+ unit.status = ActiveStatus("Ready")
+
+ def on_upgrade_charm(self, event):
+ """Upgrade the charm."""
+ unit = self.model.unit
+ unit.status = MaintenanceStatus("Upgrading charm")
+ self.on_start(event)
+
+
+if __name__ == "__main__":
+ main(PLACharm)