func cleanDockerGraph(graphDir string, v versionutil.Version) error {
logrus.Debugf("Cleaning for version %s", v)
// Handle migration files
migratedVersion := versionutil.StaticVersion(1, 10, 0)
migratedVersion.Tag = "dev"
if v.LessThan(migratedVersion) {
if err := removeIfExists(filepath.Join(graphDir, ".migration-v1-images.json")); err != nil {
return err
}
if err := removeIfExists(filepath.Join(graphDir, ".migration-v1-tags")); err != nil {
return err
}
root := filepath.Join(graphDir, "graph")
migrationPurger := func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
if !info.IsDir() {
if strings.HasPrefix(filepath.Base(path), ".migrat") {
logrus.Debugf("Removing migration file %s", path)
if err := os.Remove(path); err != nil {
return err
}
}
}
return nil
}
if err := filepath.Walk(root, migrationPurger); err != nil {
return err
}
// Remove all containers
infos, err := ioutil.ReadDir(filepath.Join(graphDir, "containers"))
if err != nil {
if os.IsNotExist(err) {
return nil
}
return err
}
drivers, err := getAllGraphDrivers(graphDir)
if err != nil {
return err
}
for _, info := range infos {
container := info.Name()
for _, graphDriver := range drivers {
if err := removeLayerGraphContent(container, "mount-id", graphDriver, graphDir); err != nil && !os.IsNotExist(err) {
return err
}
if err := removeLayerGraphContent(container, "init-id", graphDriver, graphDir); err != nil && !os.IsNotExist(err) {
return err
}
}
if err := os.RemoveAll(filepath.Join(graphDir, "containers", container)); err != nil {
return err
}
}
if err := os.RemoveAll(filepath.Join(graphDir, "image")); err != nil {
return err
}
if err := removeIfExists(filepath.Join(graphDir, "linkgraph.db")); err != nil {
return err
}
// TODO: Remove everything in graph driver directory which is not in graph
}
return nil
}
func (bc *fsBuildCache) InstallVersion(v versionutil.Version, target string) error {
cached := bc.getCached(v)
var cachedInit string
if cached == "" {
if v.Commit != "" {
return ErrCannotDownloadCommit
}
resp, err := http.Get(v.DownloadURL())
if err != nil {
return err
}
tf, err := bc.tempFile()
if err != nil {
return err
}
_, err = io.Copy(tf, resp.Body)
if err != nil {
if err := bc.cleanupTempFile(tf); err != nil {
// Just log
log.Printf("Error cleaning up temp file %v: %s", tf.Name(), err)
}
return err
}
cached, err = bc.saveVersion(tf, v)
if err != nil {
return err
}
// Remove any "-init"
cachedInit = initFile(cached)
if _, err := os.Stat(cachedInit); err == nil {
if err := os.Remove(cachedInit); err != nil {
return err
}
}
} else {
cachedInit = initFile(cached)
}
if err := CopyFile(cached, target, 0755); err != nil {
return err
}
targetInit := initFile(target)
if _, err := os.Stat(cachedInit); err == nil {
// Create target file, check if name starts with docker, replace with dockerinit
return CopyFile(cachedInit, targetInit, 0755)
}
if _, err := os.Stat(targetInit); err == nil {
// Truncate file, do not remove since operator may only have access
// to file and not directory. Future calls may rely on overwriting
// the content of this file.
vf, err := os.OpenFile(targetInit, os.O_TRUNC|os.O_WRONLY, 0755)
if err != nil {
return err
}
return vf.Close()
}
return nil
}