Legacy plugins expect host-relative paths (such as for Volume.Mount).
However, a containerized plugin cannot respond with a host-relative
path. Therefore, this commit modifies new volume plugins' paths in Mount
and List to prepend the container's rootfs path.
This introduces a new PropagatedMount field in the Plugin Config.
When it is set for volume plugins, RootfsPropagation is set to rshared
and the path specified by PropagatedMount is bind-mounted with rshared
prior to launching the container. This is so that the daemon code can
access the paths returned by the plugin from the host mount namespace.
Signed-off-by: Tibor Vass <tibor@docker.com>
Upstream-commit: c54b717caf1a55e525ce180bfcb42addd59c6633
Component: engine
This is similar to network scopes where a volume can either be `local`
or `global`. A `global` volume is one that exists across the entire
cluster where as a `local` volume exists on a single engine.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: 2f40b1b281a3be8f34d82a5170988ee46ea1f442
Component: engine
This generates an ID string for calls to Mount/Unmount, allowing drivers
to differentiate between two callers of `Mount` and `Unmount`.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: 2b6bc294fc7f9e08a9091833b021b7d2a01ad2a6
Component: engine
The `Status` field is a `map[string]interface{}` which allows the driver to pass
back low-level details about the underlying volume.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: 36a1c56cf555f8fe9ceabeebb8fc956e05863fc7
Component: engine
Implements a `CachedPath` function on the volume plugin adapter that we
call from the volume list function instead of `Path.
If a driver does not implement `CachedPath` it will just call `Path`.
Also makes sure we store the path on Mount and remove the path on
Unmount.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: 9e6b1852a78eda6ed2cb255d6be8a0d0e5a5ca40
Component: engine
In cases where the a plugin responds with both a null or empty volume
and a null or empty Err, the daemon would panic.
This is because we assumed the idiom if `err` is nil, then `v` must not
be but in reality the plugin may return whatever it wants and we want to
make sure it doesn't harm the daemon.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: 96c79a1934dd52d2a6f648e519b5d4ac60ac8ca1
Component: engine
Hacks were added as interim support for 1.10 but should not be needed
for 1.11.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: 3403a01b07a73defe9f15c30e16ec8dfcab50439
Component: engine
Use a back-compat struct to handle listing volumes for volumes we know
about (because, presumably, they are being used by a container) for
volume drivers which don't yet support `List`.
Adds a fall-back for the volume driver `Get` call, which will use
`Create` when the driver returns a `404` for `Get`. The old behavior was
to always use `Create` to get a volume reference.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: f6c20d9b22ec9913f67b6c2ebdb5ef07c87b8cd7
Component: engine
Makes `docker volume ls` and `docker volume inspect` ask the volume
drivers rather than only using what is cached locally.
Previously in order to use a volume from an external driver, one would
either have to use `docker volume create` or have a container that is
already using that volume for it to be visible to the other volume
API's.
For keeping uniqueness of volume names in the daemon, names are bound to
a driver on a first come first serve basis. If two drivers have a volume
with the same name, the first one is chosen, and a warning is logged
about the second one.
Adds 2 new methods to the plugin API, `List` and `Get`.
If a plugin does not implement these endpoints, a user will not be able
to find the specified volumes as well requests go through the drivers.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: d3eca4451d264aac564594fe46b8c097bd85a5cc
Component: engine
