how to get secrets from broken docker swarm

Question

My swarm server is broken(Linux system error), sadly it is only one node.

I read https://docs.docker.com/v17.09/engine/swarm/admin_guide/#back-up-the-swarm

Answer 1

It took me few hours today to figure out why docker daemon hangs after

docker swarm init --force-new-cluster

I believe there is one step missing from the official doc https://docs.docker.com/v17.09/engine/swarm/admin_guide/#restore-from-a-backup

Because after I removed docker-state.json then ran

docker swarm init --force-new-cluster --advertise-addr :2377

things work as expect.