I'm using docker desktop for mac.
I have built a docker image for a Node.js app that connects to an external MongoDB database via URI (the db is running on an AWS instance that I'm connected to over vpn). This works fine - I run the container and the app can connect to the database. Happy days.
Then...
I enable Kubernetes on docker desktop. I apply a deployment.yml to run the container but this deployment fails when trying to connect to the db. From my app's logs (I'm using mongoose):
MongooseServerSelectionError: connect EHOSTUNREACH [MY DB IP] +30005msInterestingly...
I can now no longer connect to the db by running my docker container either. I get the same error.
I have to disable kubernetes, restart docker desktop (twice), prune my previous container and network, and re-run my container. Then it will work again.
As soon as I enable kubernetes again, the db becomes unreachable again.
Any ideas why this is and/or how to fix it?
So the issue for us turned out to be an IP range clash. Exactly the same as described in this SO question:
https://stackoverflow.com/questions/53590312/change-kubernetes-docker-for-desktop-cluster-network-ip
Unfortunately, like this user, we haven't been able to find a solution