fix: try fetch lost layer when unpack image #1
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If someone removes the content or snapshot by-pass the cri plugin, cir in-memory metadata think the image exists. When we create sandbox or container, we can't find snapshot and unpack from the content layer with the `discard_unpacked_layers` cri config. In that case, we can try fetch the lost image layer to complete create container. Signed-off-by: Yadong Ding <ding_yadong@foxmail.com>
When CRI has config `discardUnpackedLayers`, we should allows GC to clean layers up from the content store after unpacking. Use ctx to notificate unpack image to gc layer content when retry fetch lost layers. Signed-off-by: Yadong Ding <ding_yadong@foxmail.com>
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If someone removes the content or snapshot by-pass the cri plugin, cir in-memory metadata think the image exists. When we create sandbox or container, we can't find snapshot and unpack from the content layer with the
discard_unpacked_layersCRI config. In that case, we can try fetch the lost image layer to complete create container.example
discard_unpacked_layers=trueCRI config with overlayfs, pulled OCI images.In that case, we can't find snapshot with nydus sanpshotter. We can't unpack from the content store as well, because we use the
discard_unpacked_layers=trueconfig, the layer had discarded. We can try fetching the lost layer when unpacking image to fix this issue.