NAS Configuration

Do not overwrite entire daemon.json with scripts — you may lose data-root and break existing containers.

Assumes HubProxy is exposed at https://example.com via reverse proxy.

Synology DSM (Container Manager)

DSM 7.2+ renamed Docker to Container Manager.

UI (Recommended)

Container Manager → Registry → Settings
Select Docker Hub → Edit
Enable Registry mirror, enter https://example.com
Save and restart Docker engine

SSH (dockerd.json)

DSM ≤7.2: /var/packages/Docker/etc/dockerd.json

DSM 7.3+: /var/packages/ContainerManager/etc/dockerd.json

"registry-mirrors": ["https://example.com"]

Restart:

sudo systemctl restart pkgctl-Docker              # DSM ≤7.2
sudo systemctl restart pkg-ContainerManager-dockerd  # DSM 7.3+

Verify: sudo docker info | grep -A3 "Registry Mirrors"

Feiniu fnOS

Official guidance: do not edit /etc/docker/daemon.json directly with third-party scripts — it contains data-root; clearing it can make images/containers disappear.

Web UI (Recommended)

Docker → Image Registry → Registry Settings / Mirror Settings
Add URL: https://example.com
Move to top of list, save, restart Docker

Manual edit (Advanced)

Back up first; only append to registry-mirrors, keep data-root, restart Docker.

Notes

App Center apps may use fixed registries (e.g. Aliyun) unrelated to HubProxy
Restart Docker after changes