Sounds a lot like the host OS is generic instead of container-focused, which could be part of the problem.
What was the cause/solution? Images too big?
What was the cause/solution? Images too big?
The cause was indeed images being too big. Images — not only the raw images, but also their extracted contents on the filesystem — count towards ephemeral storage too. In their case they can't even control the size of the images because those are supplied by a vendor.
The solution was to increase the node's disk space.