1. Reduce complexity due to nested if blocks by using early
return/continue
2. Improve logging
Changes suggested as a part of code review comments in 39748
Signed-off-by: Vikram bir Singh <vikrambir.singh@docker.com>
Refactored exiting logic on way that layers are first marked to be under
removal so if actual removal fails they can be found from disk and
cleaned up.
Full garbage collector will be implemented as part of containerd
migration.
Signed-off-by: Olli Janatuinen <olli.janatuinen@gmail.com>
Layer metadata storage has not been implemented outside of the layer
store and will be deprecated by containerd metadata storage. To prepare
for this and freeze the current metadata storage, remove the exported
interface and make it internal to the layer store.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
The `digest` data type, used throughout docker for image verification
and identity, has been broken out into `opencontainers/go-digest`. This
PR updates the dependencies and moves uses over to the new type.
Signed-off-by: Stephen J Day <stephen.day@docker.com>
Fixes case where shutdown occurs before content is synced to disked
on layer creation. This case can leave the layer store in an bad
state and require manual recovery. This change ensures all files
are synced to disk before a layer is committed. Any shutdown that
occurs will only cause the layer to not show up but will allow it to
be repulled or recreated without error.
Added generic io logic to ioutils package to abstract it out of
the layer store package.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
Add continue when layer fails on store creation
Trim whitespace from layerstore files to keep trailing space from failing a layer load
Fixes#19449
Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
Layer store manages read-only and read-write layers on a union file system.
Read only layers are always referenced by content addresses.
Read-write layer identifiers are handled by the caller but upon registering
its difference, the committed read-only layer will be referenced by content
hash.
Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
