portainer: No such host error when attempting to update a stack

Bug description

I’m unable to update any stack definition in portainer on v 1.17.0 running on a docker swarm with engine v17.12

Expected behavior Change the yaml for a stack and hit update, should update the stack. In this case I am change the image used.

Steps to reproduce the issue:

Steps to reproduce the behavior:

1. Click on a stack
2. Change any parameter (or comment out an environment variable)
3. Click update the stack
4. error during connect: Get https://%2Fvar%2Frun%2Fdocker.sock/v1.37/info: dial tcp: lookup /var/run/docker.sock: no such host

(code=500)

Technical details:

• Portainer version: 1.17
• Docker version (managed by Portainer): 17.12, swarm
• Platform (windows/linux): linux
• Command used to start Portainer (docker run -p 9000:9000 portainer/portainer): deployed as stack

---

version: ‘3.4’

services: portainer: image: portainer/portainer command: -H unix:///var/run/docker.sock ports: - “9000:9000” volumes: - /var/run/docker.sock:/var/run/docker.sock - vol-portainer-data:/data deploy: replicas: 1 restart_policy: delay: 10s placement: constraints: - node.role == manager

• Browser: Chrome

Additional context I’m still able to make changes to services, update containers, even use the console for a container. It’s just updating a stack that fails.