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This implements support for mounting and unmounting volumes
backed by volume plugins. Support for actually retrieving
plugins requires a pull request to land in containers.conf and
then that to be vendored, and as such is not yet ready. Given
this, this code is only compile tested. However, the code for
everything past retrieving the plugin has been written - there is
support for creating, removing, mounting, and unmounting volumes,
which should allow full functionality once the c/common PR is
merged.
A major change is the signature of the MountPoint function for
volumes, which now, by necessity, returns an error. Named volumes
managed by a plugin do not have a mountpoint we control; instead,
it is managed entirely by the plugin. As such, we need to cache
the path in the DB, and calls to retrieve it now need to access
the DB (and may fail as such).
Notably absent is support for SELinux relabelling and chowning
these volumes. Given that we don't manage the mountpoint for
these volumes, I am extremely reluctant to try and modify it - we
could easily break the plugin trying to chown or relabel it.
Also, we had no less than *5* separate implementations of
inspecting a volume floating around in pkg/infra/abi and
pkg/api/handlers/libpod. And none of them used volume.Inspect(),
the only correct way of inspecting volumes. Remove them all and
consolidate to using the correct way. Compat API is likely still
doing things the wrong way, but that is an issue for another day.
Fixes #4304
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
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With the advent of Podman 2.0.0 we crossed the magical barrier of go
modules. While we were able to continue importing all packages inside
of the project, the project could not be vendored anymore from the
outside.
Move the go module to new major version and change all imports to
`github.com/containers/libpod/v2`. The renaming of the imports
was done via `gomove` [1].
[1] https://github.com/KSubedi/gomove
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
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move the chown for newly created volumes after the spec generation so
the correct UID/GID are known.
Closes: https://github.com/containers/libpod/issues/5698
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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In Podman 1.6.3, we added support for anonymous volumes - fixing
our old, broken support for named volumes that were created with
containers. Unfortunately, this reused the database field we used
for the old implementation, and toggled volume removal on for
`podman run --rm` - so now, we were removing *named* volumes
created with older versions of Podman.
We can't modify these old volumes in the DB, so the next-safest
thing to do is swap to a new field to indicate volumes should be
removed. Problem: Volumes created with 1.6.3 and up until this
lands, even anonymous volumes, will not be removed. However, this
is safer than removing too many volumes, as we were doing before.
Fixes #5009
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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We initialized the map to show them, but didn't actually copy
them in, so they weren't being displayed.
Signed-off-by: Matthew Heon <mheon@redhat.com>
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Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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Begin to separate the internal structures and frontend for
inspect on volumes. We can't rely on keeping internal data
structures for external presentation - separating presentation
and internal data format is good practice.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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