Hi all! I'm currently trying to set up

meltano ui

in production, but having some issues similar to previously where the service is calling out to some external URI instead of just relying on local data. We have some pretty strict firewall policies (telco) so opening up an egress to one of these domain is easier said than done. Seems like the UI is calling out to both "discovery.meltano.com" and "pypi.org", see screenshot. In the logs of the container, I see that it has an issue parsing a local discovery.yaml file, which could be the reason why it falls back to reading files from the internet? I don't see why it wouldn't be able to read the file though because the cached

discovery.yml

file is there in the root directory of the project as recommended by the meltano docs. Any ideas what's wrong here?

@martin_morset I also noticed this when I was working on a feature for meltano on ~Friday to dump the entire project exactly as is parsed/interpreted by meltano to stdout as yaml (like kubectl describe). I got a bunch of those !!comment type things. I was using the

cononical

method in the codebase and figured I was doing something wrong. But maybe its a bigger issue 🤔

We recently moved to ruamel.yaml for our yaml parsing in order to preserve anchors, aliases, comments, etc. when parsing and rewriting

meltano.yml

files. At a glance, it would seem that ruamel.yaml might unexpectedly be dumping some additional python objects beyond what's supported by the jsonschemas for

meltano.yml

and

discovery.yml

. @alexander_butler @martin_morset what version of Meltano are you each seeing this issue in? If you've noticed the issue in multiple meltano versions, what release did you first see the issue in? FYI @edgar_ramirez_mondragon

meltano.yml

shouldn’t have this problem, but I see how

discovery.yml

could given that it still uses the old yaml library for serde

@martin_morset This is what I do to stop meltano from hanging on trying to connect to discovery.meltano.com: `export MELTANO_DISCOVERY_URL=false`https://docs.meltano.com/reference/settings#discovery_url

@cody_hanson I'm on

2.3.0

(latest afaik).