The WalT images are built based on Docker images. A docker image, by definition has a base layer and numerous layers, which each of them is generated automatically with manipulative command executions.
The manipulations are added to an image without further commands in WalT right after an image is changed either by copying files into the image via walt image cp <local_path> <image:tag:image_path> or by executing a series of commands via walt image shell.
When the maximum number of layers are reached, WalT server crashes unexpectedly. The expected behavior is either (1) merging manipulative layers to build a new base without any further interaction or (2) introduce a walt image squash <layered-image-name> <squashed-image-name> commad which may behave similar to docker --squash command.
First one has the disadvantage of modifying users' layers without prior notice.
Second one requires a warning message when number of layers are more than some predetermined value.
The WalT images are built based on Docker images. A docker image, by definition has a base layer and numerous layers, which each of them is generated automatically with manipulative command executions.
See https://stackoverflow.com/questions/31222377/what-are-docker-image-layers See https://stackoverflow.com/questions/39382518/whats-the-reason-for-the-42-layer-limit-in-docker
The manipulations are added to an image without further commands in WalT right after an image is changed either by copying files into the image via
walt image cp <local_path> <image:tag:image_path>or by executing a series of commands viawalt image shell.When the maximum number of layers are reached, WalT server crashes unexpectedly. The expected behavior is either (1) merging manipulative layers to build a new base without any further interaction or (2) introduce a
walt image squash <layered-image-name> <squashed-image-name>commad which may behave similar todocker --squashcommand.First one has the disadvantage of modifying users' layers without prior notice. Second one requires a warning message when number of layers are more than some predetermined value.