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#!/usr/bin/env python3
##
# Copyright 2020 Canonical Ltd.
# All rights reserved.
#
# 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
sys.path.append("lib")
from charms.osm.sshproxy import SSHProxyCharm
from ops.main import main
class MySSHProxyCharm(SSHProxyCharm):
def __init__(self, framework, key):
super().__init__(framework, key)
# Listen to charm events
self.framework.observe(self.on.config_changed, self.on_config_changed)
self.framework.observe(self.on.install, self.on_install)
self.framework.observe(self.on.start, self.on_start)
# Listen to the touch action event
self.framework.observe(self.on.touch_action, self.on_touch_action)
self.framework.observe(
self.on.interface_relation_changed, self.on_interface_relation_changed
)
def on_config_changed(self, event):
"""Handle changes in configuration"""
super().on_config_changed(event)
def on_install(self, event):
"""Called when the charm is being installed"""
super().on_install(event)
def on_start(self, event):
"""Called when the charm is being started"""
super().on_start(event)
def on_touch_action(self, event):
"""Touch a file."""
if self.model.unit.is_leader():
filename = event.params["filename"]
proxy = self.get_ssh_proxy()
stdout, stderr = proxy.run("touch {}".format(filename))
event.set_results({"output": stdout})
else:
event.fail("Unit is not leader")
return
def on_interface_relation_changed(self, event):
parameter = "Hello"
event.relation.data[self.model.unit]["parameter"] = parameter
self.model.unit.status = ActiveStatus("Parameter sent: {}".format(parameter))
if __name__ == "__main__":
main(MySSHProxyCharm)