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https://github.com/containers/podman.git
synced 2026-03-19 15:18:44 -04:00
b513dc4c1e
When initing machines, we download a machine image, and uncompress and copy the image for the actual vm image. When a user constantly pulls new machines, there may be a buildup of old, unused machine images. This commit cleans ups the unused cached images. Changes: - If the machine is pulled from a URL or from the FCOS releases, we pull them into XDG_DATA_HOME/containers/podman/machine/vmType/cache - Cache cleanups only happen if there is a cache miss, and we need to pull a new image - For Fedora and FCOS, we actually use the cache, so we go through the cache dir and remove any images older than 2 weeks (FCOS's release cycle), on a cache miss. - For generic files pulled from a URL, we don't actually cache, so we delete the pulled file immediately after creating a machine image - For generic files from a local path, the original file will never be cleaned up Note that because we cache in a different dir, this will not clean up old images pulled before this commit. [NO NEW TESTS NEEDED] Signed-off-by: Ashley Cui <acui@redhat.com>
98 lines
2.1 KiB
Go
98 lines
2.1 KiB
Go
//go:build amd64 || arm64
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// +build amd64 arm64
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package machine
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import (
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"errors"
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"fmt"
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"os"
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"net/http"
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"net/url"
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"path/filepath"
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"time"
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)
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const (
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githubLatestReleaseURL = "https://github.com/containers/podman-wsl-fedora/releases/latest/download/rootfs.tar.xz"
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)
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type FedoraDownload struct {
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Download
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}
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func NewFedoraDownloader(vmType, vmName, releaseStream string) (DistributionDownload, error) {
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downloadURL, size, err := getFedoraDownload(githubLatestReleaseURL)
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if err != nil {
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return nil, err
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}
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cacheDir, err := GetCacheDir(vmType)
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if err != nil {
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return nil, err
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}
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imageName := "rootfs.tar.xz"
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f := FedoraDownload{
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Download: Download{
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Arch: getFcosArch(),
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Artifact: artifact,
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CacheDir: cacheDir,
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Format: Format,
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ImageName: imageName,
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LocalPath: filepath.Join(cacheDir, imageName),
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URL: downloadURL,
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VMName: vmName,
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Size: size,
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},
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}
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dataDir, err := GetDataDir(vmType)
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if err != nil {
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return nil, err
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}
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f.Download.LocalUncompressedFile = f.getLocalUncompressedFile(dataDir)
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return f, nil
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}
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func (f FedoraDownload) Get() *Download {
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return &f.Download
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}
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func (f FedoraDownload) HasUsableCache() (bool, error) {
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info, err := os.Stat(f.LocalPath)
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if err != nil {
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if errors.Is(err, os.ErrNotExist) {
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return false, nil
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}
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return false, err
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}
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return info.Size() == f.Size, nil
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}
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func (f FedoraDownload) CleanCache() error {
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// Set cached image to expire after 2 weeks
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expire := 14 * 24 * time.Hour
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return removeImageAfterExpire(f.CacheDir, expire)
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}
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func getFedoraDownload(releaseURL string) (*url.URL, int64, error) {
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downloadURL, err := url.Parse(releaseURL)
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if err != nil {
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return nil, -1, fmt.Errorf("invalid URL generated from discovered Fedora file: %s: %w", releaseURL, err)
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}
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resp, err := http.Head(releaseURL)
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if err != nil {
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return nil, -1, fmt.Errorf("head request failed: %s: %w", releaseURL, err)
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}
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_ = resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return nil, -1, fmt.Errorf("head request failed: %s: %w", releaseURL, err)
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}
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return downloadURL, resp.ContentLength, nil
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}
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