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layers: remove layerStore.getWithoutLock()
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This function was abstracting things a bit too much; the layerStore had a
exported `.Get()` which called `.getWithoutLock()`, but also a non-exported
`.get()`, which also called `.getWithoutLock()`.
While it's common to have a non-exported variant (without locking), the naming
of `.get()` could easily be confused for that variant (which it wasn't).
All locations where `.get()` was called were already handling locks for
`releaseLayer()`, so moving the actual locking inline for `.get()` makes it
more visible where locking happens.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
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I think this was there for historic reasons (may have been goimports expected
this, and we used to have a linter that wanted it), but it's not needed, so
let's remove it (to make my IDE less complaining about unneeded aliases).
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
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This code was originally written for v1.10 migration where it signified that layers
were recomputed from pre 1.8 layout and could possibly change the tarball checksums.
It's now being repurposed in the BuildKit adapter but there it doesn't have any
warn condition as all data generated by builder is new anyway.
Currently, debug log entries as the one below may appear in the daemon logs:
[2019-10-02T10:00:06.690674253Z] could not get checksum for "x128nsj79yzfx4j5h6em2w2on" with tar-split: "no tar-split file"
This patch removes the debug log, as it may confuse users ("we couldn't validate
what we downloaded, but we're gonna run it anyway?")
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
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Format the source according to latest goimports.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
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This is an additon to commit 1fea38856a ("Remove v1.10 migrator")
aka PR #38265. Since that one, CreateRWLayerByGraphID() is not
used anywhere, so let's drop it.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
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Goroutine stack analisys shown some lock contention
while doing massively (100 instances of `docker rm`)
parallel image removal, with many goroutines waiting
for the mountL mutex. Optimize it.
With this commit, the above operation is about 3x
faster, with no noticeable change to container
creation times (tested on aufs and overlay2).
kolyshkin@:
- squashed commits
- added description
- protected CreateRWLayer against name collisions by
temporary assiging nil to ls.mounts[name], and treating
nil as "non-existent" in all the other functions.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
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Signed-off-by: Daniel Nephin <dnephin@docker.com>
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Signed-off-by: John Howard <jhoward@microsoft.com>
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Signed-off-by: John Howard <jhoward@microsoft.com>
The re-coalesces the daemon stores which were split as part of the
original LCOW implementation.
This is part of the work discussed in https://github.com/moby/moby/issues/34617,
in particular see the document linked to in that issue.
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Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
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Fixes case sensitivity issue
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
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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>
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Close tarsplit gzip writer when creating tar-split.json.gz files during layer migration
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layer migration
There is a missing call to Close on the gzip.Writer that is used to
compress newly created tar-split files during layer migration. This can
result in corrupt tar-split files that later cause docker push and
docker save to fail. The Close call is necessary to flush buffered data
to the stream.
Fixes: #20104
Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
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Also changes missing storage layer for container
RWLayer to a soft failure.
Fixes #20147
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
(cherry picked from commit 2798d7a6a681aee8995e87c9b68128e54876d2b5)
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Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
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RWLayer will now have more operations and be protected through a referenced type rather than always looked up by string in the layer store.
Separates creation of RWLayer (write capture layer) from mounting of the layer.
This allows mount labels to be applied after creation and allowing RWLayer objects to have the same lifespan as a container without performance regressions from requiring mount.
Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
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Signed-off-by: Aidan Hobson Sayers <aidanhs@cantab.net>
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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>
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