Add nocreate option for named volumes #27867
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ygalblum
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Add a per-volume 'nocreate' option that prevents automatic creation of
named volumes when they don't exist. When specified, Podman will fail
if the volume is not found instead of creating it automatically.
Usage: -v myvolume:/data:nocreate
--mount type=volume,src=myvolume,dst=/data,nocreate
See: containers#27862
Signed-off-by: Ygal Blum <ygal.blum@gmail.com>
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Luap99
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Thanks, I prefer this one. One comment on the implementation code but otherwise this seem fine.
| // Extract nocreate option before validation since it's not a standard mount option | ||
| rawOpts := strings.Split(splitVol[2], ",") | ||
| filteredOpts := make([]string, 0, len(rawOpts)) | ||
| for _, opt := range rawOpts { | ||
| if opt == "nocreate" { | ||
| noCreate = true | ||
| } else { | ||
| filteredOpts = append(filteredOpts, opt) | ||
| } | ||
| } | ||
| if len(filteredOpts) > 0 { | ||
| if options, err = parse.ValidateVolumeOpts(filteredOpts); err != nil { | ||
| return nil, nil, nil, err | ||
| } |
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I think this needs to be moved into ValidateVolumeOpts it already has options there that are not real mount options anyway.
Doing parsing in several places is never good otherwise, we should filter that option out later I think for consistent, i.e.
#26945
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The reason I chose this way was that ValidateVolumeOpts is implemented in the common repo and this option was only for Podman. So, I wasn't sure if putting a usage specific option in the common code would be a better practice. But, I guess this is not the only case. So, I'll open a PR there and update this PR once its merged.
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I've added it to the valid list: containers/container-libs#585
Once merged, I will move the actual parsing into
Line 35 in fd90d33
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Add a per-volume 'nocreate' option that prevents automatic creation of named volumes when they don't exist. When specified, Podman will fail if the volume is not found instead of creating it automatically.
Usage: -v myvolume:/data:nocreate
--mount type=volume,src=myvolume,dst=/data,nocreate
See: #27862
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Fixes: #00000in commit message (if applicable)make validatepr(format/lint checks)Noneif no user-facing changes)Does this PR introduce a user-facing change?