Updated examples to use juju.loop

[osm/N2VC.git] / examples / unitrun.py

diff --git a/examples/unitrun.py b/examples/unitrun.py
index 7e3c490..3dfacd6 100644 (file)
--- a/examples/unitrun.py
+++ b/examples/unitrun.py
@@ -1,47 +1,47 @@
 """
-Run this one against a model that has at least one unit deployed.
+This example:
+
+1. Connects to current model and resets it.
+2. Deploys one ubuntu unit.
+3. Runs an action against the unit.
+4. Waits for the action results to come back, then exits.
 
 """
 import asyncio
-import functools
+import logging
 
 from juju.model import Model
-from juju.unit import Unit
-from juju.client.connection import Connection
-
-
-loop = asyncio.get_event_loop()
-conn = loop.run_until_complete(Connection.connect_current())
-
-_seen_units = set()
+from juju import loop
 
 
-async def run_stuff_on_unit(unit):
-    if unit.Name in _seen_units:
-        return
+async def run_command(unit):
+    logging.debug('Running command on unit %s', unit.name)
 
-    print('Running command on unit', unit.Name)
-    # unit.run() returns a client.ActionResults instance
-    action_results = await unit.run('unit-get public-address')
-    _seen_units.add(unit.Name)
-    action_result = action_results.results[0]
+    # unit.run() returns a juju.action.Action instance
+    action = await unit.run('unit-get public-address')
+    logging.debug("Action results: %s", action.results)
 
-    print('Results from unit', unit.Name)
-    print(action_result.__dict__)
 
+async def main():
+    model = Model()
+    await model.connect_current()
+    await model.reset(force=True)
 
-def on_model_change(delta, old, new, model):
-    if isinstance(new, Unit):
-        task = loop.create_task(run_stuff_on_unit(new))
+    app = await model.deploy(
+        'ubuntu-0',
+        application_name='ubuntu',
+        series='trusty',
+        channel='stable',
+    )
 
-    if delta.entity == 'action':
-        print(delta.data)
-        print(new)
+    for unit in app.units:
+        await run_command(unit)
 
+    await model.disconnect()
 
-async def watch_model():
-    model = Model(conn)
-    model.add_observer(on_model_change)
-    await model.watch()
 
-loop.run_until_complete(watch_model())
+if __name__ == '__main__':
+    logging.basicConfig(level=logging.DEBUG)
+    ws_logger = logging.getLogger('websockets.protocol')
+    ws_logger.setLevel(logging.INFO)
+    loop.run(main())