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Previously, we only did this for volumes created at the same time
as the container. However, this is not correct behavior - Docker
does so for all named volumes, even those made with
'podman volume create' and mounted into a container later.
Fixes #3945
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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When volume options and the local volume driver are specified,
the volume is intended to be mounted using the 'mount' command.
Supported options will be used to volume the volume before the
first container using it starts, and unmount the volume after the
last container using it dies.
This should work for any local filesystem, though at present I've
only tested with tmpfs and btrfs.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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We need to be able to track the number of times a volume has been
mounted for tmpfs/nfs/etc volumes. As such, we need a mutable
state for volumes. Add one, with the expected update/save methods
in both states.
There is backwards compat here, in that older volumes without a
state will still be accepted.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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In upcoming commits, we're going to turn on the backends for
these fields. Volumes with these set will act fundamentally
differently from other volumes. There will probably be validation
required for each field.
Until now, though, we've freely allowed creation of volumes with
these set - they just did nothing. So we have no idea what could
be in the DB with old volumes.
Change the struct tags so we don't have to worry about old,
unvalidated data. We'll start fresh with new volumes.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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This will require a 'podman system renumber' after being applied
to get lock numbers for existing volumes.
Add the DB backend code for rewriting volume configs and use it
for updating lock numbers as part of 'system renumber'.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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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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We're no longer using either of these JSON libraries, dropped
them in favor of jsoniter. We can't completely remove ffjson as
c/storage uses it and can't easily migrate, but we can make sure
that libpod itself isn't doing anything with them anymore.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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When removing volumes with rm --volumes we want to only remove
volumes that were created with the container. Volumes created
separately via 'podman volume create' should not be removed.
Also ensure that --rm implies volumes will be removed.
Fixes #2441
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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I was looking into why we have locks in volumes, and I'm fairly
convinced they're unnecessary.
We don't have a state whose accesses we need to guard with locks
and syncs. The only real purpose for the lock was to prevent
concurrent removal of the same volume.
Looking at the code, concurrent removal ought to be fine with a
bit of reordering - one or the other might fail, but we will
successfully evict the volume from the state.
Also, remove the 'prune' bool from RemoveVolume. None of our
other API functions accept it, and it only served to toggle off
more verbose error messages.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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Remove runtime's lockDir as it is no longer needed after the lock
rework.
Add a trivial in-memory lock manager for unit testing
Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
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Add support for podman volume and its subcommands.
The commands supported are:
podman volume create
podman volume inspect
podman volume ls
podman volume rm
podman volume prune
This is a tool to manage volumes used by podman. For now it only handle
named volumes, but eventually it will handle all volumes used by podman.
Signed-off-by: umohnani8 <umohnani@redhat.com>
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