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tasks.go
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tasks.go
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package registry
import (
"fmt"
"math"
"os"
"regexp"
"sort"
"strings"
"time"
"github.com/spf13/viper"
"github.com/tidwall/gjson"
)
type TagData struct {
name string
created time.Time
}
func (t TagData) String() string {
return fmt.Sprintf(`"%s <%s>"`, t.name, t.created.Format("2006-01-02 15:04:05"))
}
type timeSlice []TagData
func (p timeSlice) Len() int {
return len(p)
}
func (p timeSlice) Less(i, j int) bool {
// reverse sort tags on name if equal dates (OCI image case)
// see https://github.com/Quiq/registry-ui/pull/62
if p[i].created.Equal(p[j].created) {
return p[i].name > p[j].name
}
return p[i].created.After(p[j].created)
}
func (p timeSlice) Swap(i, j int) {
p[i], p[j] = p[j], p[i]
}
// PurgeOldTags purge old tags.
func PurgeOldTags(client *Client, purgeDryRun bool, purgeIncludeRepos, purgeExcludeRepos string) {
logger := SetupLogging("registry.tasks.PurgeOldTags")
keepDays := viper.GetInt("purge_tags.keep_days")
keepCount := viper.GetInt("purge_tags.keep_count")
keepRegexp := viper.GetString("purge_tags.keep_regexp")
keepFromFile := viper.GetString("purge_tags.keep_from_file")
dryRunText := ""
if purgeDryRun {
logger.Warn("Dry-run mode enabled.")
dryRunText = "skipped"
}
var dataFromFile gjson.Result
if keepFromFile != "" {
if _, err := os.Stat(keepFromFile); os.IsNotExist(err) {
logger.Warnf("Cannot open %s: %s", keepFromFile, err)
logger.Error("Not purging anything!")
return
}
data, err := os.ReadFile(keepFromFile)
if err != nil {
logger.Warnf("Cannot read %s: %s", keepFromFile, err)
logger.Error("Not purging anything!")
return
}
dataFromFile = gjson.ParseBytes(data)
}
catalog := []string{}
if purgeIncludeRepos != "" {
logger.Infof("Including repositories: %s", purgeIncludeRepos)
catalog = append(catalog, strings.Split(purgeIncludeRepos, ",")...)
} else {
client.RefreshCatalog()
catalog = client.GetRepos()
}
if purgeExcludeRepos != "" {
logger.Infof("Excluding repositories: %s", purgeExcludeRepos)
tmpCatalog := []string{}
for _, repo := range catalog {
if !ItemInSlice(repo, strings.Split(purgeExcludeRepos, ",")) {
tmpCatalog = append(tmpCatalog, repo)
}
}
catalog = tmpCatalog
}
logger.Infof("Working on repositories: %s", catalog)
now := time.Now().UTC()
repos := map[string]timeSlice{}
count := 0
for _, repo := range catalog {
tags := client.ListTags(repo)
if len(tags) == 0 {
continue
}
logger.Infof("[%s] scanning %d tags...", repo, len(tags))
for _, tag := range tags {
imageRef := repo + ":" + tag
created := client.GetImageCreated(imageRef)
if created.IsZero() {
// Image manifest with zero creation time, e.g. cosign w/o --record-creation-timestamp
logger.Debugf("[%s] tag with zero creation time: %s", repo, tag)
continue
}
repos[repo] = append(repos[repo], TagData{name: tag, created: created})
}
}
logger.Infof("Scanned %d repositories.", len(catalog))
logger.Infof("Filtering out tags for purging: keep %d days, keep count %d", keepDays, keepCount)
if keepRegexp != "" {
logger.Infof("Keeping tags matching regexp: %s", keepRegexp)
}
if keepFromFile != "" {
logger.Infof("Keeping tags from file: %+v", dataFromFile)
}
purgeTags := map[string][]string{}
keepTags := map[string][]string{}
count = 0
for _, repo := range SortedMapKeys(repos) {
// Sort tags by "created" from newest to oldest.
sort.Sort(repos[repo])
// Prep the list of tags to preserve if defined in the file
tagsFromFile := []string{}
for _, i := range dataFromFile.Get(repo).Array() {
tagsFromFile = append(tagsFromFile, i.String())
}
// Filter out tags
for _, tag := range repos[repo] {
daysOld := int(now.Sub(tag.created).Hours() / 24)
matchByRegexp := false
if keepRegexp != "" {
matchByRegexp, _ = regexp.MatchString(keepRegexp, tag.name)
}
if daysOld > keepDays && !matchByRegexp && !ItemInSlice(tag.name, tagsFromFile) {
purgeTags[repo] = append(purgeTags[repo], tag.name)
} else {
keepTags[repo] = append(keepTags[repo], tag.name)
}
}
// Keep minimal count of tags no matter how old they are.
if len(keepTags[repo]) < keepCount {
// At least "threshold"-"keep" but not more than available for "purge".
takeFromPurge := int(math.Min(float64(keepCount-len(keepTags[repo])), float64(len(purgeTags[repo]))))
keepTags[repo] = append(keepTags[repo], purgeTags[repo][:takeFromPurge]...)
purgeTags[repo] = purgeTags[repo][takeFromPurge:]
}
count = count + len(purgeTags[repo])
logger.Infof("[%s] All %d: %v", repo, len(repos[repo]), repos[repo])
logger.Infof("[%s] Keep %d: %v", repo, len(keepTags[repo]), keepTags[repo])
logger.Infof("[%s] Purge %d: %v", repo, len(purgeTags[repo]), purgeTags[repo])
}
logger.Infof("There are %d tags to purge.", count)
if count > 0 {
logger.Info("Purging old tags...")
}
for _, repo := range SortedMapKeys(purgeTags) {
if len(purgeTags[repo]) == 0 {
continue
}
logger.Infof("[%s] Purging %d tags... %s", repo, len(purgeTags[repo]), dryRunText)
if purgeDryRun {
continue
}
for _, tag := range purgeTags[repo] {
client.DeleteTag(repo, tag)
}
}
logger.Info("Done.")
}