[davemooreuws]

On Docker Desktop the host can't reach Docker's bridge address, 172.17.0.1, which OpenSandbox put in every sandbox address it returned, so the API never reached a local sandbox.

OpenSandbox 1.1.0 takes two hosts, so compose.yml now sets each to one that works everywhere:

• [server].eip = "127.0.0.1" is the host in the addresses returned to the API. Sandbox ports are published on 0.0.0.0 (hard-coded as DOCKER_PUBLISH_HOST), so they answer on loopback, and Docker Desktop forwards them to the host's loopback.
• [docker].host_ip = "host.docker.internal" is how the OpenSandbox container itself reaches them, for its proxy and egress readiness check. The service's extra_hosts: host-gateway entry resolves it on Docker Engine and Docker Desktop.

publish_host is gone: OpenSandbox's DockerConfig has no such field and Pydantic ignores unknown keys, so it never did anything. With no setting left to choose, OPENSANDBOX_HOST_IP is gone too.

The OpenSandbox tests (sandboxes.test.ts, tools/sandbox.test.ts) pass on Docker Desktop for Windows and on Docker Engine on Ubuntu 24.04 (a temporary Actions run, removed). Docker Desktop for Mac should behave like Windows but hasn't been run.

An existing OpenSandbox needs docker compose --profile sandboxes up -d --force-recreate opensandbox: Compose doesn't recreate it when only the inline config changes.

Closes SUGA-2002

[cloudflare-workers-and-pages]

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Status	Name	Latest Commit	Updated (UTC)
✅ Deployment successful! View logs	sugabots-website	366bc8f	Oct 15 2026, 06:28 AM

[davemooreuws]

@jyecusch / @HomelessDinosaur could you test this on Mac?

[HomelessDinosaur]

Worked for me