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feat: add support for searching volatile-containers.json #3644

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feat: add support for searching volatile-containers.json #3644

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37 changes: 26 additions & 11 deletions container/podman/fs.go
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,7 @@ import (

const (
containersJSONFilename = "containers.json"
volatileContainersJSONFilename = "volatile-containers.json"
)

type containersJSON struct {
Expand All @@ -34,20 +35,34 @@ type containersJSON struct {
}

func rwLayerID(storageDriver docker.StorageDriver, storageDir string, containerID string) (string, error) {
data, err := os.ReadFile(filepath.Join(storageDir, string(storageDriver)+"-containers", containersJSONFilename))
if err != nil {
return "", err
searchInFile := func(filename string) (string, error) {
data, err := os.ReadFile(filepath.Join(storageDir, string(storageDriver)+"-containers", filename))
if err != nil {
return "", err
}
var containers []containersJSON
err = json.Unmarshal(data, &containers)
if err != nil {
return "", err
}

for _, c := range containers {
if c.ID == containerID {
return c.Layer, nil
}
}

return "", nil
}
var containers []containersJSON
err = json.Unmarshal(data, &containers)
if err != nil {
return "", err

layer, err := searchInFile(containersJSONFilename)
if err == nil && layer != "" {
return layer, nil
}

for _, c := range containers {
if c.ID == containerID {
return c.Layer, nil
}
layer, err = searchInFile(volatileContainersJSONFilename)
if err == nil && layer != "" {
return layer, nil
}

return "", fmt.Errorf("unable to determine %v rw layer id", containerID)
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