Just noting this because it wasted way more of my time that it should have…
So you write an etcd app in a different language from your previous apps and it can’t see the data that the other apps wrote? Check the versions of your client libraries. The v2 and v3 data stores in etcd are different, and cannot be seen by each other. You need to convert your v2 data to the v3 data store before it will be visible there.
You’re welcome.