Question 1

How do I set up persistent storage for Docker images in CoreOS VM on Mac?

Accepted Answer

The app automatically creates a sparse disk (data.img) mounted to /data, which binds to /var/lib/docker for persistence. You don't need to configure it manually—just ensure the VM is running and data will survive reboots.

Question 2

CoreOS VM for macOS vs Docker for Mac: which should I use?

Accepted Answer

Use CoreOS VM if you need CoreOS-specific features, rkt support, or integration with tools like etcd. Docker for Mac is better for a simpler, native Docker experience without the overhead of a full VM and CoreOS ecosystem.

Question 3

Can I run Kubernetes on CoreOS VM for macOS?

Accepted Answer

Yes, the README mentions integration with Kubernetes apps like Kube-solo and Kube-Cluster for macOS. You can use this VM as a base for local Kubernetes development, but additional setup might be required.

Question 4

Why is Corectl App required, and what does it do?

Accepted Answer

Corectl App serves as the corectld server daemon to control corectl tools needed for running CoreOS VMs. It's a separate dependency that manages virtualization via the macOS Hypervisor framework, so you must install it first.

Question 5

How to troubleshoot if CoreOS VM won't start on my Mac?

Accepted Answer

Check that Corectl App is installed and running, ensure macOS version is 10.10.3 or later, and verify iTerm2 is available. The app may auto-install iTerm2, but conflicts with existing terminals could cause issues.

Question 6

Is rkt supported, and how do I use it with this VM?

Accepted Answer

Yes, rkt is pre-installed on the CoreOS VM. Use the provided rkt shell script in ~/coreos-osx/bin to call rkt remotely via SSH, and data persists via the /data mount for /var/lib/rkt.

CoreOS VM

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