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podman: add support for splitting imagestore

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Add support for `--imagestore` in podman which allows users to split the filesystem of containers vs image store, imagestore if configured will pull images in image storage instead of the graphRoot while keeping the other parts still in the originally configured graphRoot.

This is an implementation of
https://github.com/containers/storage/pull/1549 in podman.

Signed-off-by: Aditya R <arajan@redhat.com>
This commit is contained in:
Aditya R
2023-06-13 11:11:42 +05:30
parent 719e3228b1
commit 3829fbd35a
7 changed files with 97 additions and 0 deletions
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4
cmd/podman/root.go
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@ -507,6 +507,10 @@ func rootFlags(cmd *cobra.Command, podmanConfig *entities.PodmanConfig) {
pFlags.StringVar(&podmanConfig.Runroot, runrootFlagName, "", "Path to the 'run directory' where all state information is stored")
_ = cmd.RegisterFlagCompletionFunc(runrootFlagName, completion.AutocompleteDefault)
imageStoreFlagName := "imagestore"
pFlags.StringVar(&podmanConfig.ImageStore, imageStoreFlagName, "", "Path to the `image store`, different from `graph root`, use this to split storing the image into a separate `image store`, see `man containers-storage.conf` for details")
_ = cmd.RegisterFlagCompletionFunc(imageStoreFlagName, completion.AutocompleteDefault)
pFlags.BoolVar(&podmanConfig.TransientStore, "transient-store", false, "Enable transient container storage")
runtimeFlagName := "runtime"