The error encountered was:

ErrImagePull: "net/http: request canceled"

I wonder if this timeout value is configurable, or if it's hard-coded? We might consider raising the timeout, but I would much prefer to look into whatever is causing the network slowness to begin with.

A few theories have surfaced:

• it could be MTU-related, as we've seen previously
• this could be a misconfiguration of our deployments resulting from misunderstanding the "layer-cake" of volumes and FS types

We have seen this occur in several scenarios:

1. multi-node on OpenStack volumes with underlying XFS
2. single-node without an OpenStack volume at all

As i recall, changing our xfs docker volume to ext4 was a slight improvement, but that doesn't explain the shoddy performance on a single-node installation when no are volumes involved. Perhaps we should default to this going forward? More discussion will certainly be needed.

Should we just abandon CoreOS? This is a reasonable solution.