I’m experiencing an issue with my Docker container that sends Pub/Sub messages. The container works perfectly when run locally on my laptop and on a Google Kubernetes Engine (GKE) cluster in Google Cloud. However, when deploying the same container on Docker Swarm, it fails to send messages.

Its wired, because as soon as i try to curl information through the REST API of PubSub from inside the container, it does work, an i get messages.

I also dont get any Messages, when i try to log out from the Libary, it just doesn’t do anything.

Hope someone can help me, or hint some steps how i can debugge this issue further

Test Docker Container locally, works
Test it from GKE Cluster, works
On Docker Swarm with Python Client Libary it is not working, but HTTP Requests work.