[Bug]: ERR Failed to list containers for docker

[fabrykowski]

Error Message and Logs

I just noticed, that my coolify-proxy can't (re)start, and only prints the following error messages:

coolify-proxy  | 2025-12-12T16:08:29Z ERR Failed to list containers for docker error="Get \"http://%2Fvar%2Frun%2Fdocker.sock/v1.51/containers/json?all=1\": context canceled" providerName=docker
coolify-proxy  | 2025-12-12T16:08:29Z ERR Cannot retrieve data error="context canceled" providerName=docker
coolify-proxy  | 2025-12-12T16:08:44Z ERR Failed to list containers for docker error="Get \"http://%2Fvar%2Frun%2Fdocker.sock/v1.51/containers/json?all=1\": context canceled" providerName=docker
coolify-proxy  | 2025-12-12T16:08:44Z ERR Cannot retrieve data error="context canceled" providerName=docker
coolify-proxy  | 2025-12-12T16:09:13Z ERR Failed to list containers for docker error="Get \"http://%2Fvar%2Frun%2Fdocker.sock/v1.51/containers/json?all=1\": context canceled" providerName=docker
coolify-proxy  | 2025-12-12T16:09:13Z ERR Cannot retrieve data error="context canceled" providerName=docker
coolify-proxy  | 2025-12-12T16:14:57Z ERR Failed to list containers for docker error="Get \"http://%2Fvar%2Frun%2Fdocker.sock/v1.51/containers/json?all=1\": context canceled" providerName=docker

The UI itself is reachable (how?), but the server is marked as "Not reachable & Not usable by Coolify".

Steps to Reproduce

1. Run Coolify?

Example Repository URL

No response

Coolify Version

v4.0.0-beta.452

Are you using Coolify Cloud?

No (self-hosted)

Operating System and Version (self-hosted)

Debian 13

Additional Information

docker --version
Docker version 29.1.3, build f52814d

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🔗 Similar Issues

Related Issues

• Bug: host host.docker.internal not in authorized list #5823
• [Bug]: Unable to Start Proxy #6430
• [Bug]: Error 500 with every and only new deployments on Status refresh #3831
• [Bug]: Coolify Traefik Proxy No Longer Working After Recent Update #7193
• [Bug]: Container status is unhealthy #6178
• [Bug]: Coolify container becomes UNHEALTHY after restart #7314

🔗 Related PRs

#7400 - Fix: Traefik proxy startup issues [merged]

👤 Suggested Assignees

• yipfram
• jayjarosz
• TheProcedural
• NoorChasib
• mtavano

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[djsisson]

Docker version 29.1.3 this requires you to update to at least traefik v3.6.1 to fix the issue

[fabrykowski]

Thank you! A manual docker compose pull inside /data/coolify/proxy resolved the problem.