Hi All, I'm currently working on getting python-libjuju to successfully deploy the landscape-dense-maas bundle. It fails, as outlined in https://bugs.launchpad.net/juju/+bug/1651260.
(python-libjuju is a Python client that talks to Juju's websocket API; I'm currently using it inside the matrix testing framework.) The comments in that bug suggest that the root of the problem is that I'm trying to deploy a charm (haproxy) that has an empty string as a default value, but python-libjuju is using the legacy "config" param when it calls ApplicationDeploy in the api, rather than the new "config-yaml" param. This sounds simple to fix -- all I have to do is change an arg from "config" to "config-yaml", and everything should work! One hitch: the "config" param expects a json object, which is what we get back when we make our initial call to the planner, but config-yaml expects a string with yaml in it (this is per the logic in deployApplication in juju/apiserver/application/application.go). That also sounds simple. As we do elsewhere in python-libjuju when we want to pass a yaml blob to the API, I use Python's handy yaml library, do yaml.dump(config), where "config" is the json config object I got from the planner, and everything should work! This is where I'm stuck. If I pass in such a string, the websocket API simple hangs, and stops talking to me. I don't even see any error messages in the logs on my controller :-/ Does anyone have any insight as to what I might be doing incorrectly? In Python3, yaml.dump will produce a utf-8 string by default. All of that will get serialized to json before being submitted over the websocket, though, so I don't *think* that it's an encoding issue. (Passing the bundle in as a yaml blob to the planner in the first place works.) The config object I get back from the planner isn't wrapped in an "options" key, but adding that key before dumping the config to a yaml string doesn't fix the problem -- I still see the hang. Apologies for the length of the post. And thanks in advance for anything you can do to get me unstuck! ~ PeteVG
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